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4584 lines
151 KiB
C
4584 lines
151 KiB
C
/* GStreamer
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*
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* Copyright (C) 2014 Samsung Electronics. All rights reserved.
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* Author: Thiago Santos <thiagoss@osg.samsung.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/**
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* SECTION:gstadaptivedemux
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* @short_description: Base class for adaptive demuxers
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*
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* What is an adaptive demuxer?
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* Adaptive demuxers are special demuxers in the sense that they don't
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* actually demux data received from upstream but download the data
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* themselves.
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*
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* Adaptive formats (HLS, DASH, MSS) are composed of a manifest file and
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* a set of fragments. The manifest describes the available media and
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* the sequence of fragments to use. Each fragment contains a small
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* part of the media (typically only a few seconds). It is possible for
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* the manifest to have the same media available in different configurations
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* (bitrates for example) so that the client can select the one that
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* best suits its scenario (network fluctuation, hardware requirements...).
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* It is possible to switch from one representation of the media to another
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* during playback. That's why it is called 'adaptive', because it can be
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* adapted to the client's needs.
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*
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* Architectural overview:
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* The manifest is received by the demuxer in its sink pad and, upon receiving
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* EOS, it parses the manifest and exposes the streams available in it. For
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* each stream a source element will be created and will download the list
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* of fragments one by one. Once a fragment is finished downloading, the next
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* URI is set to the source element and it starts fetching it and pushing
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* through the stream's pad. This implies that each stream is independent from
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* each other as it runs on a separate thread.
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*
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* After downloading each fragment, the download rate of it is calculated and
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* the demuxer has a chance to switch to a different bitrate if needed. The
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* switch can be done by simply pushing a new caps before the next fragment
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* when codecs are the same, or by exposing a new pad group if it needs
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* a codec change.
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*
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* Extra features:
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* - Not linked streams: Streams that are not-linked have their download threads
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* interrupted to save network bandwidth. When they are
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* relinked a reconfigure event is received and the
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* stream is restarted.
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*
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* Subclasses:
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* While GstAdaptiveDemux is responsible for the workflow, it knows nothing
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* about the intrinsics of the subclass formats, so the subclasses are
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* resposible for maintaining the manifest data structures and stream
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* information.
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*/
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/*
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MT safety.
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The following rules were observed while implementing MT safety in adaptive demux:
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1. If a variable is accessed from multiple threads and at least one thread
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writes to it, then all the accesses needs to be done from inside a critical section.
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2. If thread A wants to join thread B then at the moment it calls gst_task_join
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it must not hold any mutexes that thread B might take.
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Adaptive demux API can be called from several threads. More, adaptive demux
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starts some threads to monitor the download of fragments. In order to protect
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accesses to shared variables (demux and streams) all the API functions that
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can be run in different threads will need to get a mutex (manifest_lock)
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when they start and release it when they end. Because some of those functions
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can indirectly call other API functions (eg they can generate events or messages
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that are processed in the same thread) the manifest_lock must be recursive.
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The manifest_lock will serialize the public API making access to shared
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variables safe. But some of these functions will try at some moment to join
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threads created by adaptive demux, or to change the state of src elements
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(which will block trying to join the src element streaming thread). Because
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of rule 2, those functions will need to release the manifest_lock during the
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call of gst_task_join. During this time they can be interrupted by other API calls.
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For example, during the precessing of a seek event, gst_adaptive_demux_stop_tasks
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is called and this will join all threads. In order to prevent interruptions
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during such period, all the API functions will also use a second lock: api_lock.
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This will be taken at the beginning of the function and released at the end,
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but this time this lock will not be temporarily released during join.
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This lock will be used only by API calls (not by gst_adaptive_demux_stream_download_loop
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or gst_adaptive_demux_updates_loop or _src_chain or _src_event) so it is safe
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to hold it while joining the threads or changing the src element state. The
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api_lock will serialise all external requests to adaptive demux. In order to
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avoid deadlocks, if a function needs to acquire both manifest and api locks,
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the api_lock will be taken first and the manifest_lock second.
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By using the api_lock a thread is protected against other API calls. But when
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temporarily dropping the manifest_lock, it will be vulnerable to changes from
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threads that use only the manifest_lock and not the api_lock. These threads run
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one of the following functions: gst_adaptive_demux_stream_download_loop,
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gst_adaptive_demux_updates_loop, _src_chain, _src_event. In order to guarantee
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that all operations during an API call are not impacted by other writes, the
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above mentioned functions must check a cancelled flag every time they reacquire
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the manifest_lock. If the flag is set, they must exit immediately, without
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performing any changes on the shared data. In this way, an API call (eg seek
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request) can set the cancel flag before releasing the manifest_lock and be sure
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that the demux object and its streams are not changed by anybody else.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "gstadaptivedemux.h"
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#include "gst/gst-i18n-plugin.h"
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#include <gst/base/gstadapter.h>
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GST_DEBUG_CATEGORY (adaptivedemux_debug);
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#define GST_CAT_DEFAULT adaptivedemux_debug
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#define MAX_DOWNLOAD_ERROR_COUNT 3
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#define DEFAULT_FAILED_COUNT 3
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#define DEFAULT_CONNECTION_SPEED 0
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#define DEFAULT_BITRATE_LIMIT 0.8f
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#define SRC_QUEUE_MAX_BYTES 20 * 1024 * 1024 /* For safety. Large enough to hold a segment. */
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#define NUM_LOOKBACK_FRAGMENTS 3
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#define GST_MANIFEST_GET_LOCK(d) (&(GST_ADAPTIVE_DEMUX_CAST(d)->priv->manifest_lock))
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#define GST_MANIFEST_LOCK(d) G_STMT_START { \
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GST_TRACE("Locking from thread %p", g_thread_self()); \
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g_rec_mutex_lock (GST_MANIFEST_GET_LOCK (d)); \
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GST_TRACE("Locked from thread %p", g_thread_self()); \
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} G_STMT_END
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#define GST_MANIFEST_UNLOCK(d) G_STMT_START { \
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GST_TRACE("Unlocking from thread %p", g_thread_self()); \
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g_rec_mutex_unlock (GST_MANIFEST_GET_LOCK (d)); \
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} G_STMT_END
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#define GST_API_GET_LOCK(d) (&(GST_ADAPTIVE_DEMUX_CAST(d)->priv->api_lock))
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#define GST_API_LOCK(d) g_mutex_lock (GST_API_GET_LOCK (d));
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#define GST_API_UNLOCK(d) g_mutex_unlock (GST_API_GET_LOCK (d));
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#define GST_ADAPTIVE_DEMUX_SEGMENT_GET_LOCK(d) (&GST_ADAPTIVE_DEMUX_CAST(d)->priv->segment_lock)
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#define GST_ADAPTIVE_DEMUX_SEGMENT_LOCK(d) g_mutex_lock (GST_ADAPTIVE_DEMUX_SEGMENT_GET_LOCK (d))
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#define GST_ADAPTIVE_DEMUX_SEGMENT_UNLOCK(d) g_mutex_unlock (GST_ADAPTIVE_DEMUX_SEGMENT_GET_LOCK (d))
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enum
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{
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PROP_0,
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PROP_CONNECTION_SPEED,
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PROP_BITRATE_LIMIT,
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PROP_LAST
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};
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/* Internal, so not using GST_FLOW_CUSTOM_SUCCESS_N */
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#define GST_ADAPTIVE_DEMUX_FLOW_SWITCH (GST_FLOW_CUSTOM_SUCCESS_2 + 1)
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struct _GstAdaptiveDemuxPrivate
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{
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GstAdapter *input_adapter; /* protected by manifest_lock */
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gboolean have_manifest; /* protected by manifest_lock */
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GList *old_streams; /* protected by manifest_lock */
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GstTask *updates_task; /* MT safe */
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GRecMutex updates_lock;
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GMutex updates_timed_lock;
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GCond updates_timed_cond; /* protected by updates_timed_lock */
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gboolean stop_updates_task; /* protected by updates_timed_lock */
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/* used only from updates_task, no need to protect it */
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gint update_failed_count;
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guint32 segment_seqnum; /* protected by manifest_lock */
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/* main lock used to protect adaptive demux and all its streams.
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* It serializes the adaptive demux public API.
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*/
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GRecMutex manifest_lock;
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/* condition to wait for manifest updates on a live stream.
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* In order to signal the manifest_cond, the caller needs to hold both
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* manifest_lock and manifest_update_lock (taken in this order)
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*/
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GCond manifest_cond;
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GMutex manifest_update_lock;
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/* Lock and condition for prerolling streams before exposing */
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GMutex preroll_lock;
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GCond preroll_cond;
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gint preroll_pending;
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GMutex api_lock;
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/* Protects demux and stream segment information
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* Needed because seeks can update segment information
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* without needing to stop tasks when they just want to
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* update the segment boundaries */
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GMutex segment_lock;
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};
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typedef struct _GstAdaptiveDemuxTimer
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{
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volatile gint ref_count;
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GCond *cond;
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GMutex *mutex;
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GstClockID clock_id;
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gboolean fired;
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} GstAdaptiveDemuxTimer;
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static GstBinClass *parent_class = NULL;
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static gint private_offset = 0;
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static void gst_adaptive_demux_class_init (GstAdaptiveDemuxClass * klass);
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static void gst_adaptive_demux_init (GstAdaptiveDemux * dec,
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GstAdaptiveDemuxClass * klass);
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static void gst_adaptive_demux_finalize (GObject * object);
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static GstStateChangeReturn gst_adaptive_demux_change_state (GstElement *
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element, GstStateChange transition);
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static void gst_adaptive_demux_handle_message (GstBin * bin, GstMessage * msg);
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static gboolean gst_adaptive_demux_sink_event (GstPad * pad, GstObject * parent,
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GstEvent * event);
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static GstFlowReturn gst_adaptive_demux_sink_chain (GstPad * pad,
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GstObject * parent, GstBuffer * buffer);
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static gboolean gst_adaptive_demux_src_query (GstPad * pad, GstObject * parent,
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GstQuery * query);
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static gboolean gst_adaptive_demux_src_event (GstPad * pad, GstObject * parent,
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GstEvent * event);
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static gboolean
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gst_adaptive_demux_push_src_event (GstAdaptiveDemux * demux, GstEvent * event);
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static void gst_adaptive_demux_updates_loop (GstAdaptiveDemux * demux);
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static void gst_adaptive_demux_stream_download_loop (GstAdaptiveDemuxStream *
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stream);
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static void gst_adaptive_demux_reset (GstAdaptiveDemux * demux);
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static gboolean gst_adaptive_demux_prepare_streams (GstAdaptiveDemux * demux,
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gboolean first_and_live);
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static gboolean gst_adaptive_demux_expose_streams (GstAdaptiveDemux * demux);
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static gboolean gst_adaptive_demux_is_live (GstAdaptiveDemux * demux);
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static GstFlowReturn gst_adaptive_demux_stream_seek (GstAdaptiveDemux * demux,
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GstAdaptiveDemuxStream * stream, gboolean forward, GstSeekFlags flags,
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GstClockTime ts, GstClockTime * final_ts);
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static gboolean gst_adaptive_demux_stream_has_next_fragment (GstAdaptiveDemux *
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demux, GstAdaptiveDemuxStream * stream);
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static gboolean gst_adaptive_demux_stream_select_bitrate (GstAdaptiveDemux *
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demux, GstAdaptiveDemuxStream * stream, guint64 bitrate);
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static GstFlowReturn
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gst_adaptive_demux_stream_update_fragment_info (GstAdaptiveDemux * demux,
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GstAdaptiveDemuxStream * stream);
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static gint64
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gst_adaptive_demux_stream_get_fragment_waiting_time (GstAdaptiveDemux * demux,
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GstAdaptiveDemuxStream * stream);
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static GstFlowReturn gst_adaptive_demux_update_manifest (GstAdaptiveDemux *
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demux);
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static GstFlowReturn
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gst_adaptive_demux_update_manifest_default (GstAdaptiveDemux * demux);
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static gboolean gst_adaptive_demux_has_next_period (GstAdaptiveDemux * demux);
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static void gst_adaptive_demux_advance_period (GstAdaptiveDemux * demux);
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static void gst_adaptive_demux_stream_free (GstAdaptiveDemuxStream * stream);
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static GstFlowReturn
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gst_adaptive_demux_stream_push_event (GstAdaptiveDemuxStream * stream,
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GstEvent * event);
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static void gst_adaptive_demux_stop_manifest_update_task (GstAdaptiveDemux *
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demux);
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static void gst_adaptive_demux_start_manifest_update_task (GstAdaptiveDemux *
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demux);
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static void gst_adaptive_demux_start_tasks (GstAdaptiveDemux * demux,
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gboolean start_preroll_streams);
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static void gst_adaptive_demux_stop_tasks (GstAdaptiveDemux * demux,
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gboolean stop_updates);
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static GstFlowReturn gst_adaptive_demux_combine_flows (GstAdaptiveDemux *
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demux);
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static void
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gst_adaptive_demux_stream_fragment_download_finish (GstAdaptiveDemuxStream *
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stream, GstFlowReturn ret, GError * err);
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static GstFlowReturn
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gst_adaptive_demux_stream_data_received_default (GstAdaptiveDemux * demux,
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GstAdaptiveDemuxStream * stream, GstBuffer * buffer);
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static GstFlowReturn
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gst_adaptive_demux_stream_finish_fragment_default (GstAdaptiveDemux * demux,
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GstAdaptiveDemuxStream * stream);
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static GstFlowReturn
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gst_adaptive_demux_stream_advance_fragment_unlocked (GstAdaptiveDemux * demux,
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GstAdaptiveDemuxStream * stream, GstClockTime duration);
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static gboolean
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gst_adaptive_demux_wait_until (GstClock * clock, GCond * cond, GMutex * mutex,
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GstClockTime end_time);
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static gboolean gst_adaptive_demux_clock_callback (GstClock * clock,
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GstClockTime time, GstClockID id, gpointer user_data);
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static gboolean
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gst_adaptive_demux_requires_periodical_playlist_update_default (GstAdaptiveDemux
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* demux);
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/* we can't use G_DEFINE_ABSTRACT_TYPE because we need the klass in the _init
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* method to get to the padtemplates */
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GType
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gst_adaptive_demux_get_type (void)
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{
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static volatile gsize type = 0;
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if (g_once_init_enter (&type)) {
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GType _type;
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static const GTypeInfo info = {
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sizeof (GstAdaptiveDemuxClass),
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NULL,
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NULL,
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(GClassInitFunc) gst_adaptive_demux_class_init,
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NULL,
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NULL,
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sizeof (GstAdaptiveDemux),
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0,
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(GInstanceInitFunc) gst_adaptive_demux_init,
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};
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_type = g_type_register_static (GST_TYPE_BIN,
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"GstAdaptiveDemux", &info, G_TYPE_FLAG_ABSTRACT);
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private_offset =
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g_type_add_instance_private (_type, sizeof (GstAdaptiveDemuxPrivate));
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g_once_init_leave (&type, _type);
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}
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return type;
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}
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static inline GstAdaptiveDemuxPrivate *
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gst_adaptive_demux_get_instance_private (GstAdaptiveDemux * self)
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{
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return (G_STRUCT_MEMBER_P (self, private_offset));
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}
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static void
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gst_adaptive_demux_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstAdaptiveDemux *demux = GST_ADAPTIVE_DEMUX (object);
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GST_API_LOCK (demux);
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GST_MANIFEST_LOCK (demux);
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switch (prop_id) {
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case PROP_CONNECTION_SPEED:
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demux->connection_speed = g_value_get_uint (value) * 1000;
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GST_DEBUG_OBJECT (demux, "Connection speed set to %u",
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demux->connection_speed);
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break;
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case PROP_BITRATE_LIMIT:
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demux->bitrate_limit = g_value_get_float (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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GST_MANIFEST_UNLOCK (demux);
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GST_API_UNLOCK (demux);
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}
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static void
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gst_adaptive_demux_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstAdaptiveDemux *demux = GST_ADAPTIVE_DEMUX (object);
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GST_MANIFEST_LOCK (demux);
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switch (prop_id) {
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case PROP_CONNECTION_SPEED:
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g_value_set_uint (value, demux->connection_speed / 1000);
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break;
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case PROP_BITRATE_LIMIT:
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g_value_set_float (value, demux->bitrate_limit);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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GST_MANIFEST_UNLOCK (demux);
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}
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static void
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gst_adaptive_demux_class_init (GstAdaptiveDemuxClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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GstBinClass *gstbin_class;
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gobject_class = G_OBJECT_CLASS (klass);
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gstelement_class = GST_ELEMENT_CLASS (klass);
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gstbin_class = GST_BIN_CLASS (klass);
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GST_DEBUG_CATEGORY_INIT (adaptivedemux_debug, "adaptivedemux", 0,
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"Base Adaptive Demux");
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parent_class = g_type_class_peek_parent (klass);
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if (private_offset != 0)
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g_type_class_adjust_private_offset (klass, &private_offset);
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gobject_class->set_property = gst_adaptive_demux_set_property;
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gobject_class->get_property = gst_adaptive_demux_get_property;
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gobject_class->finalize = gst_adaptive_demux_finalize;
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g_object_class_install_property (gobject_class, PROP_CONNECTION_SPEED,
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g_param_spec_uint ("connection-speed", "Connection Speed",
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"Network connection speed in kbps (0 = calculate from downloaded"
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" fragments)", 0, G_MAXUINT / 1000, DEFAULT_CONNECTION_SPEED,
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|
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
|
|
/* FIXME 2.0: rename this property to bandwidth-usage or any better name */
|
|
g_object_class_install_property (gobject_class, PROP_BITRATE_LIMIT,
|
|
g_param_spec_float ("bitrate-limit",
|
|
"Bitrate limit in %",
|
|
"Limit of the available bitrate to use when switching to alternates.",
|
|
0, 1, DEFAULT_BITRATE_LIMIT,
|
|
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
|
|
gstelement_class->change_state = gst_adaptive_demux_change_state;
|
|
|
|
gstbin_class->handle_message = gst_adaptive_demux_handle_message;
|
|
|
|
klass->data_received = gst_adaptive_demux_stream_data_received_default;
|
|
klass->finish_fragment = gst_adaptive_demux_stream_finish_fragment_default;
|
|
klass->update_manifest = gst_adaptive_demux_update_manifest_default;
|
|
klass->requires_periodical_playlist_update =
|
|
gst_adaptive_demux_requires_periodical_playlist_update_default;
|
|
|
|
}
|
|
|
|
static void
|
|
gst_adaptive_demux_init (GstAdaptiveDemux * demux,
|
|
GstAdaptiveDemuxClass * klass)
|
|
{
|
|
GstPadTemplate *pad_template;
|
|
GstClockType clock_type = GST_CLOCK_TYPE_OTHER;
|
|
GObjectClass *gobject_class;
|
|
|
|
GST_DEBUG_OBJECT (demux, "gst_adaptive_demux_init");
|
|
|
|
demux->priv = gst_adaptive_demux_get_instance_private (demux);
|
|
demux->priv->input_adapter = gst_adapter_new ();
|
|
demux->downloader = gst_uri_downloader_new ();
|
|
gst_uri_downloader_set_parent (demux->downloader, GST_ELEMENT_CAST (demux));
|
|
demux->stream_struct_size = sizeof (GstAdaptiveDemuxStream);
|
|
demux->priv->segment_seqnum = gst_util_seqnum_next ();
|
|
demux->have_group_id = FALSE;
|
|
demux->group_id = G_MAXUINT;
|
|
|
|
gst_segment_init (&demux->segment, GST_FORMAT_TIME);
|
|
|
|
gst_bin_set_suppressed_flags (GST_BIN_CAST (demux),
|
|
GST_ELEMENT_FLAG_SOURCE | GST_ELEMENT_FLAG_SINK);
|
|
|
|
demux->realtime_clock = gst_system_clock_obtain ();
|
|
g_assert (demux->realtime_clock != NULL);
|
|
gobject_class = G_OBJECT_GET_CLASS (demux->realtime_clock);
|
|
if (g_object_class_find_property (gobject_class, "clock-type")) {
|
|
g_object_get (demux->realtime_clock, "clock-type", &clock_type, NULL);
|
|
} else {
|
|
GST_WARNING_OBJECT (demux,
|
|
"System clock does not have clock-type property");
|
|
}
|
|
if (clock_type == GST_CLOCK_TYPE_REALTIME) {
|
|
demux->clock_offset = 0;
|
|
} else {
|
|
GDateTime *utc_now;
|
|
GstClockTime rtc_now;
|
|
GTimeVal gtv;
|
|
|
|
utc_now = g_date_time_new_now_utc ();
|
|
rtc_now = gst_clock_get_time (demux->realtime_clock);
|
|
g_date_time_to_timeval (utc_now, >v);
|
|
demux->clock_offset =
|
|
gtv.tv_sec * G_TIME_SPAN_SECOND + gtv.tv_usec -
|
|
GST_TIME_AS_USECONDS (rtc_now);
|
|
g_date_time_unref (utc_now);
|
|
}
|
|
g_rec_mutex_init (&demux->priv->updates_lock);
|
|
demux->priv->updates_task =
|
|
gst_task_new ((GstTaskFunction) gst_adaptive_demux_updates_loop,
|
|
demux, NULL);
|
|
gst_task_set_lock (demux->priv->updates_task, &demux->priv->updates_lock);
|
|
|
|
g_mutex_init (&demux->priv->updates_timed_lock);
|
|
g_cond_init (&demux->priv->updates_timed_cond);
|
|
|
|
g_cond_init (&demux->priv->manifest_cond);
|
|
g_mutex_init (&demux->priv->manifest_update_lock);
|
|
|
|
g_rec_mutex_init (&demux->priv->manifest_lock);
|
|
g_mutex_init (&demux->priv->api_lock);
|
|
g_mutex_init (&demux->priv->segment_lock);
|
|
|
|
g_cond_init (&demux->priv->preroll_cond);
|
|
g_mutex_init (&demux->priv->preroll_lock);
|
|
|
|
pad_template =
|
|
gst_element_class_get_pad_template (GST_ELEMENT_CLASS (klass), "sink");
|
|
g_return_if_fail (pad_template != NULL);
|
|
|
|
demux->sinkpad = gst_pad_new_from_template (pad_template, "sink");
|
|
gst_pad_set_event_function (demux->sinkpad,
|
|
GST_DEBUG_FUNCPTR (gst_adaptive_demux_sink_event));
|
|
gst_pad_set_chain_function (demux->sinkpad,
|
|
GST_DEBUG_FUNCPTR (gst_adaptive_demux_sink_chain));
|
|
|
|
/* Properties */
|
|
demux->bitrate_limit = DEFAULT_BITRATE_LIMIT;
|
|
demux->connection_speed = DEFAULT_CONNECTION_SPEED;
|
|
|
|
gst_element_add_pad (GST_ELEMENT (demux), demux->sinkpad);
|
|
}
|
|
|
|
static void
|
|
gst_adaptive_demux_finalize (GObject * object)
|
|
{
|
|
GstAdaptiveDemux *demux = GST_ADAPTIVE_DEMUX_CAST (object);
|
|
GstAdaptiveDemuxPrivate *priv = demux->priv;
|
|
|
|
GST_DEBUG_OBJECT (object, "finalize");
|
|
|
|
g_object_unref (priv->input_adapter);
|
|
g_object_unref (demux->downloader);
|
|
|
|
g_mutex_clear (&priv->updates_timed_lock);
|
|
g_cond_clear (&priv->updates_timed_cond);
|
|
g_mutex_clear (&demux->priv->manifest_update_lock);
|
|
g_cond_clear (&demux->priv->manifest_cond);
|
|
g_object_unref (priv->updates_task);
|
|
g_rec_mutex_clear (&priv->updates_lock);
|
|
g_rec_mutex_clear (&demux->priv->manifest_lock);
|
|
g_mutex_clear (&demux->priv->api_lock);
|
|
g_mutex_clear (&demux->priv->segment_lock);
|
|
if (demux->realtime_clock) {
|
|
gst_object_unref (demux->realtime_clock);
|
|
demux->realtime_clock = NULL;
|
|
}
|
|
|
|
g_cond_clear (&demux->priv->preroll_cond);
|
|
g_mutex_clear (&demux->priv->preroll_lock);
|
|
|
|
G_OBJECT_CLASS (parent_class)->finalize (object);
|
|
}
|
|
|
|
static GstStateChangeReturn
|
|
gst_adaptive_demux_change_state (GstElement * element,
|
|
GstStateChange transition)
|
|
{
|
|
GstAdaptiveDemux *demux = GST_ADAPTIVE_DEMUX_CAST (element);
|
|
GstStateChangeReturn result = GST_STATE_CHANGE_FAILURE;
|
|
|
|
GST_API_LOCK (demux);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_PAUSED_TO_READY:
|
|
GST_MANIFEST_LOCK (demux);
|
|
demux->running = FALSE;
|
|
gst_adaptive_demux_reset (demux);
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
break;
|
|
case GST_STATE_CHANGE_READY_TO_PAUSED:
|
|
GST_MANIFEST_LOCK (demux);
|
|
gst_adaptive_demux_reset (demux);
|
|
/* Clear "cancelled" flag in uridownloader since subclass might want to
|
|
* use uridownloader to fetch another manifest */
|
|
gst_uri_downloader_reset (demux->downloader);
|
|
if (demux->priv->have_manifest)
|
|
gst_adaptive_demux_start_manifest_update_task (demux);
|
|
demux->running = TRUE;
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
/* this must be run without MANIFEST_LOCK taken.
|
|
* For PLAYING to PLAYING state changes, it will want to take a lock in
|
|
* src element and that lock is held while the streaming thread is running.
|
|
* The streaming thread will take the MANIFEST_LOCK, leading to a deadlock.
|
|
*/
|
|
result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
|
|
|
|
GST_API_UNLOCK (demux);
|
|
return result;
|
|
}
|
|
|
|
static gboolean
|
|
gst_adaptive_demux_sink_event (GstPad * pad, GstObject * parent,
|
|
GstEvent * event)
|
|
{
|
|
GstAdaptiveDemux *demux = GST_ADAPTIVE_DEMUX_CAST (parent);
|
|
gboolean ret;
|
|
|
|
switch (event->type) {
|
|
case GST_EVENT_FLUSH_STOP:{
|
|
GST_API_LOCK (demux);
|
|
GST_MANIFEST_LOCK (demux);
|
|
|
|
gst_adaptive_demux_reset (demux);
|
|
|
|
ret = gst_pad_event_default (pad, parent, event);
|
|
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
GST_API_UNLOCK (demux);
|
|
|
|
return ret;
|
|
}
|
|
case GST_EVENT_EOS:{
|
|
GstAdaptiveDemuxClass *demux_class;
|
|
GstQuery *query;
|
|
gboolean query_res;
|
|
gboolean ret = TRUE;
|
|
gsize available;
|
|
GstBuffer *manifest_buffer;
|
|
|
|
GST_API_LOCK (demux);
|
|
GST_MANIFEST_LOCK (demux);
|
|
|
|
demux_class = GST_ADAPTIVE_DEMUX_GET_CLASS (demux);
|
|
|
|
available = gst_adapter_available (demux->priv->input_adapter);
|
|
|
|
if (available == 0) {
|
|
GST_WARNING_OBJECT (demux, "Received EOS without a manifest.");
|
|
ret = gst_pad_event_default (pad, parent, event);
|
|
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
GST_API_UNLOCK (demux);
|
|
|
|
return ret;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (demux, "Got EOS on the sink pad: manifest fetched");
|
|
|
|
/* Need to get the URI to use it as a base to generate the fragment's
|
|
* uris */
|
|
query = gst_query_new_uri ();
|
|
query_res = gst_pad_peer_query (pad, query);
|
|
if (query_res) {
|
|
gchar *uri, *redirect_uri;
|
|
gboolean permanent;
|
|
|
|
gst_query_parse_uri (query, &uri);
|
|
gst_query_parse_uri_redirection (query, &redirect_uri);
|
|
gst_query_parse_uri_redirection_permanent (query, &permanent);
|
|
|
|
if (permanent && redirect_uri) {
|
|
demux->manifest_uri = redirect_uri;
|
|
demux->manifest_base_uri = NULL;
|
|
g_free (uri);
|
|
} else {
|
|
demux->manifest_uri = uri;
|
|
demux->manifest_base_uri = redirect_uri;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (demux, "Fetched manifest at URI: %s (base: %s)",
|
|
demux->manifest_uri, GST_STR_NULL (demux->manifest_base_uri));
|
|
} else {
|
|
GST_WARNING_OBJECT (demux, "Upstream URI query failed.");
|
|
}
|
|
gst_query_unref (query);
|
|
|
|
/* Let the subclass parse the manifest */
|
|
manifest_buffer =
|
|
gst_adapter_take_buffer (demux->priv->input_adapter, available);
|
|
if (!demux_class->process_manifest (demux, manifest_buffer)) {
|
|
/* In most cases, this will happen if we set a wrong url in the
|
|
* source element and we have received the 404 HTML response instead of
|
|
* the manifest */
|
|
GST_ELEMENT_ERROR (demux, STREAM, DECODE, ("Invalid manifest."),
|
|
(NULL));
|
|
ret = FALSE;
|
|
} else {
|
|
demux->priv->have_manifest = TRUE;
|
|
}
|
|
gst_buffer_unref (manifest_buffer);
|
|
|
|
gst_element_post_message (GST_ELEMENT_CAST (demux),
|
|
gst_message_new_element (GST_OBJECT_CAST (demux),
|
|
gst_structure_new (GST_ADAPTIVE_DEMUX_STATISTICS_MESSAGE_NAME,
|
|
"manifest-uri", G_TYPE_STRING,
|
|
demux->manifest_uri, "uri", G_TYPE_STRING,
|
|
demux->manifest_uri,
|
|
"manifest-download-start", GST_TYPE_CLOCK_TIME,
|
|
GST_CLOCK_TIME_NONE,
|
|
"manifest-download-stop", GST_TYPE_CLOCK_TIME,
|
|
gst_util_get_timestamp (), NULL)));
|
|
|
|
if (ret) {
|
|
/* Send duration message */
|
|
if (!gst_adaptive_demux_is_live (demux)) {
|
|
GstClockTime duration = demux_class->get_duration (demux);
|
|
|
|
if (duration != GST_CLOCK_TIME_NONE) {
|
|
GST_DEBUG_OBJECT (demux,
|
|
"Sending duration message : %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (duration));
|
|
gst_element_post_message (GST_ELEMENT (demux),
|
|
gst_message_new_duration_changed (GST_OBJECT (demux)));
|
|
} else {
|
|
GST_DEBUG_OBJECT (demux,
|
|
"media duration unknown, can not send the duration message");
|
|
}
|
|
}
|
|
|
|
if (demux->next_streams) {
|
|
gst_adaptive_demux_prepare_streams (demux,
|
|
gst_adaptive_demux_is_live (demux));
|
|
gst_adaptive_demux_start_tasks (demux, TRUE);
|
|
gst_adaptive_demux_start_manifest_update_task (demux);
|
|
} else {
|
|
/* no streams */
|
|
GST_WARNING_OBJECT (demux, "No streams created from manifest");
|
|
GST_ELEMENT_ERROR (demux, STREAM, DEMUX,
|
|
(_("This file contains no playable streams.")),
|
|
("No known stream formats found at the Manifest"));
|
|
ret = FALSE;
|
|
}
|
|
|
|
}
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
GST_API_UNLOCK (demux);
|
|
|
|
gst_event_unref (event);
|
|
return ret;
|
|
}
|
|
case GST_EVENT_SEGMENT:
|
|
/* Swallow newsegments, we'll push our own */
|
|
gst_event_unref (event);
|
|
return TRUE;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return gst_pad_event_default (pad, parent, event);
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_adaptive_demux_sink_chain (GstPad * pad, GstObject * parent,
|
|
GstBuffer * buffer)
|
|
{
|
|
GstAdaptiveDemux *demux = GST_ADAPTIVE_DEMUX_CAST (parent);
|
|
|
|
GST_MANIFEST_LOCK (demux);
|
|
|
|
gst_adapter_push (demux->priv->input_adapter, buffer);
|
|
|
|
GST_INFO_OBJECT (demux, "Received manifest buffer, total size is %i bytes",
|
|
(gint) gst_adapter_available (demux->priv->input_adapter));
|
|
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
/* must be called with manifest_lock taken */
|
|
static void
|
|
gst_adaptive_demux_reset (GstAdaptiveDemux * demux)
|
|
{
|
|
GstAdaptiveDemuxClass *klass = GST_ADAPTIVE_DEMUX_GET_CLASS (demux);
|
|
GList *iter;
|
|
GList *old_streams;
|
|
GstEvent *eos;
|
|
|
|
/* take ownership of old_streams before releasing the manifest_lock in
|
|
* gst_adaptive_demux_stop_tasks
|
|
*/
|
|
old_streams = demux->priv->old_streams;
|
|
demux->priv->old_streams = NULL;
|
|
|
|
gst_adaptive_demux_stop_tasks (demux, TRUE);
|
|
|
|
if (klass->reset)
|
|
klass->reset (demux);
|
|
|
|
eos = gst_event_new_eos ();
|
|
for (iter = demux->streams; iter; iter = g_list_next (iter)) {
|
|
GstAdaptiveDemuxStream *stream = iter->data;
|
|
if (stream->pad) {
|
|
gst_pad_push_event (stream->pad, gst_event_ref (eos));
|
|
gst_pad_set_active (stream->pad, FALSE);
|
|
|
|
gst_element_remove_pad (GST_ELEMENT_CAST (demux), stream->pad);
|
|
}
|
|
gst_adaptive_demux_stream_free (stream);
|
|
}
|
|
gst_event_unref (eos);
|
|
g_list_free (demux->streams);
|
|
demux->streams = NULL;
|
|
if (demux->prepared_streams) {
|
|
g_list_free_full (demux->prepared_streams,
|
|
(GDestroyNotify) gst_adaptive_demux_stream_free);
|
|
demux->prepared_streams = NULL;
|
|
}
|
|
if (demux->next_streams) {
|
|
g_list_free_full (demux->next_streams,
|
|
(GDestroyNotify) gst_adaptive_demux_stream_free);
|
|
demux->next_streams = NULL;
|
|
}
|
|
|
|
if (old_streams) {
|
|
g_list_free_full (old_streams,
|
|
(GDestroyNotify) gst_adaptive_demux_stream_free);
|
|
}
|
|
|
|
if (demux->priv->old_streams) {
|
|
g_list_free_full (demux->priv->old_streams,
|
|
(GDestroyNotify) gst_adaptive_demux_stream_free);
|
|
demux->priv->old_streams = NULL;
|
|
}
|
|
|
|
g_free (demux->manifest_uri);
|
|
g_free (demux->manifest_base_uri);
|
|
demux->manifest_uri = NULL;
|
|
demux->manifest_base_uri = NULL;
|
|
|
|
gst_adapter_clear (demux->priv->input_adapter);
|
|
demux->priv->have_manifest = FALSE;
|
|
|
|
gst_segment_init (&demux->segment, GST_FORMAT_TIME);
|
|
|
|
demux->have_group_id = FALSE;
|
|
demux->group_id = G_MAXUINT;
|
|
demux->priv->segment_seqnum = gst_util_seqnum_next ();
|
|
}
|
|
|
|
static void
|
|
gst_adaptive_demux_handle_message (GstBin * bin, GstMessage * msg)
|
|
{
|
|
GstAdaptiveDemux *demux = GST_ADAPTIVE_DEMUX_CAST (bin);
|
|
|
|
switch (GST_MESSAGE_TYPE (msg)) {
|
|
case GST_MESSAGE_ERROR:{
|
|
GList *iter;
|
|
GstAdaptiveDemuxStream *stream = NULL;
|
|
GError *err = NULL;
|
|
gchar *debug = NULL;
|
|
gchar *new_error = NULL;
|
|
const GstStructure *details = NULL;
|
|
|
|
GST_MANIFEST_LOCK (demux);
|
|
|
|
for (iter = demux->streams; iter; iter = g_list_next (iter)) {
|
|
GstAdaptiveDemuxStream *cur = iter->data;
|
|
if (gst_object_has_as_ancestor (GST_MESSAGE_SRC (msg),
|
|
GST_OBJECT_CAST (cur->src))) {
|
|
stream = cur;
|
|
break;
|
|
}
|
|
}
|
|
if (stream == NULL) {
|
|
for (iter = demux->prepared_streams; iter; iter = g_list_next (iter)) {
|
|
GstAdaptiveDemuxStream *cur = iter->data;
|
|
if (gst_object_has_as_ancestor (GST_MESSAGE_SRC (msg),
|
|
GST_OBJECT_CAST (cur->src))) {
|
|
stream = cur;
|
|
break;
|
|
}
|
|
}
|
|
if (stream == NULL) {
|
|
GST_WARNING_OBJECT (demux,
|
|
"Failed to locate stream for errored element");
|
|
break;
|
|
}
|
|
}
|
|
|
|
gst_message_parse_error (msg, &err, &debug);
|
|
|
|
GST_WARNING_OBJECT (GST_ADAPTIVE_DEMUX_STREAM_PAD (stream),
|
|
"Source posted error: %d:%d %s (%s)", err->domain, err->code,
|
|
err->message, debug);
|
|
|
|
if (debug)
|
|
new_error = g_strdup_printf ("%s: %s\n", err->message, debug);
|
|
if (new_error) {
|
|
g_free (err->message);
|
|
err->message = new_error;
|
|
}
|
|
|
|
gst_message_parse_error_details (msg, &details);
|
|
if (details) {
|
|
gst_structure_get_uint (details, "http-status-code",
|
|
&stream->last_status_code);
|
|
}
|
|
|
|
/* error, but ask to retry */
|
|
gst_adaptive_demux_stream_fragment_download_finish (stream,
|
|
GST_FLOW_CUSTOM_ERROR, err);
|
|
|
|
g_error_free (err);
|
|
g_free (debug);
|
|
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
|
|
gst_message_unref (msg);
|
|
msg = NULL;
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (msg)
|
|
GST_BIN_CLASS (parent_class)->handle_message (bin, msg);
|
|
}
|
|
|
|
void
|
|
gst_adaptive_demux_set_stream_struct_size (GstAdaptiveDemux * demux,
|
|
gsize struct_size)
|
|
{
|
|
GST_API_LOCK (demux);
|
|
GST_MANIFEST_LOCK (demux);
|
|
demux->stream_struct_size = struct_size;
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
GST_API_UNLOCK (demux);
|
|
}
|
|
|
|
/* must be called with manifest_lock taken */
|
|
static gboolean
|
|
gst_adaptive_demux_prepare_stream (GstAdaptiveDemux * demux,
|
|
GstAdaptiveDemuxStream * stream)
|
|
{
|
|
GstPad *pad = stream->pad;
|
|
gchar *name = gst_pad_get_name (pad);
|
|
GstEvent *event;
|
|
gchar *stream_id;
|
|
|
|
gst_pad_set_active (pad, TRUE);
|
|
stream->need_header = TRUE;
|
|
|
|
stream_id = gst_pad_create_stream_id (pad, GST_ELEMENT_CAST (demux), name);
|
|
|
|
event =
|
|
gst_pad_get_sticky_event (GST_ADAPTIVE_DEMUX_SINK_PAD (demux),
|
|
GST_EVENT_STREAM_START, 0);
|
|
if (event) {
|
|
if (gst_event_parse_group_id (event, &demux->group_id))
|
|
demux->have_group_id = TRUE;
|
|
else
|
|
demux->have_group_id = FALSE;
|
|
gst_event_unref (event);
|
|
} else if (!demux->have_group_id) {
|
|
demux->have_group_id = TRUE;
|
|
demux->group_id = gst_util_group_id_next ();
|
|
}
|
|
event = gst_event_new_stream_start (stream_id);
|
|
if (demux->have_group_id)
|
|
gst_event_set_group_id (event, demux->group_id);
|
|
|
|
gst_pad_push_event (pad, event);
|
|
g_free (stream_id);
|
|
g_free (name);
|
|
|
|
GST_DEBUG_OBJECT (demux, "Preparing srcpad %s:%s", GST_DEBUG_PAD_NAME (pad));
|
|
|
|
stream->discont = TRUE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_adaptive_demux_expose_stream (GstAdaptiveDemux * demux,
|
|
GstAdaptiveDemuxStream * stream)
|
|
{
|
|
gboolean ret;
|
|
GstPad *pad = stream->pad;
|
|
GstCaps *caps;
|
|
|
|
if (stream->pending_caps) {
|
|
gst_pad_set_caps (pad, stream->pending_caps);
|
|
caps = stream->pending_caps;
|
|
stream->pending_caps = NULL;
|
|
} else {
|
|
caps = gst_pad_get_current_caps (pad);
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (demux, "Exposing srcpad %s:%s with caps %" GST_PTR_FORMAT,
|
|
GST_DEBUG_PAD_NAME (pad), caps);
|
|
if (caps)
|
|
gst_caps_unref (caps);
|
|
|
|
gst_object_ref (pad);
|
|
|
|
/* Don't hold the manifest lock while exposing a pad */
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
ret = gst_element_add_pad (GST_ELEMENT_CAST (demux), pad);
|
|
GST_MANIFEST_LOCK (demux);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* must be called with manifest_lock taken */
|
|
static GstClockTime
|
|
gst_adaptive_demux_stream_get_presentation_offset (GstAdaptiveDemux * demux,
|
|
GstAdaptiveDemuxStream * stream)
|
|
{
|
|
GstAdaptiveDemuxClass *klass;
|
|
|
|
klass = GST_ADAPTIVE_DEMUX_GET_CLASS (demux);
|
|
|
|
if (klass->get_presentation_offset == NULL)
|
|
return 0;
|
|
|
|
return klass->get_presentation_offset (demux, stream);
|
|
}
|
|
|
|
/* must be called with manifest_lock taken */
|
|
static GstClockTime
|
|
gst_adaptive_demux_get_period_start_time (GstAdaptiveDemux * demux)
|
|
{
|
|
GstAdaptiveDemuxClass *klass;
|
|
|
|
klass = GST_ADAPTIVE_DEMUX_GET_CLASS (demux);
|
|
|
|
if (klass->get_period_start_time == NULL)
|
|
return 0;
|
|
|
|
return klass->get_period_start_time (demux);
|
|
}
|
|
|
|
/* must be called with manifest_lock taken */
|
|
static gboolean
|
|
gst_adaptive_demux_prepare_streams (GstAdaptiveDemux * demux,
|
|
gboolean first_and_live)
|
|
{
|
|
GList *iter;
|
|
GstClockTime period_start, min_pts = GST_CLOCK_TIME_NONE;
|
|
|
|
g_return_val_if_fail (demux->next_streams != NULL, FALSE);
|
|
if (demux->prepared_streams != NULL) {
|
|
/* Old streams that were never exposed, due to a seek or so */
|
|
GST_FIXME_OBJECT (demux,
|
|
"Preparing new streams without cleaning up old ones!");
|
|
return FALSE;
|
|
}
|
|
|
|
demux->prepared_streams = demux->next_streams;
|
|
demux->next_streams = NULL;
|
|
|
|
if (!demux->running) {
|
|
GST_DEBUG_OBJECT (demux, "Not exposing pads due to shutdown");
|
|
return TRUE;
|
|
}
|
|
|
|
for (iter = demux->prepared_streams; iter; iter = g_list_next (iter)) {
|
|
GstAdaptiveDemuxStream *stream = iter->data;
|
|
|
|
stream->do_block = TRUE;
|
|
|
|
if (!gst_adaptive_demux_prepare_stream (demux,
|
|
GST_ADAPTIVE_DEMUX_STREAM_CAST (stream))) {
|
|
/* TODO act on error */
|
|
GST_FIXME_OBJECT (stream->pad,
|
|
"Do something on failure to expose stream");
|
|
}
|
|
|
|
if (first_and_live) {
|
|
/* TODO we only need the first timestamp, maybe create a simple function to
|
|
* get the current PTS of a fragment ? */
|
|
GST_DEBUG_OBJECT (demux, "Calling update_fragment_info");
|
|
gst_adaptive_demux_stream_update_fragment_info (demux, stream);
|
|
|
|
if (GST_CLOCK_TIME_IS_VALID (min_pts)) {
|
|
min_pts = MIN (min_pts, stream->fragment.timestamp);
|
|
} else {
|
|
min_pts = stream->fragment.timestamp;
|
|
}
|
|
}
|
|
}
|
|
|
|
period_start = gst_adaptive_demux_get_period_start_time (demux);
|
|
|
|
/* For live streams, the subclass is supposed to seek to the current
|
|
* fragment and then tell us its timestamp in stream->fragment.timestamp.
|
|
* We now also have to seek our demuxer segment to reflect this.
|
|
*
|
|
* FIXME: This needs some refactoring at some point.
|
|
*/
|
|
if (first_and_live) {
|
|
gst_segment_do_seek (&demux->segment, demux->segment.rate, GST_FORMAT_TIME,
|
|
GST_SEEK_FLAG_FLUSH, GST_SEEK_TYPE_SET, min_pts + period_start,
|
|
GST_SEEK_TYPE_NONE, -1, NULL);
|
|
}
|
|
|
|
for (iter = demux->prepared_streams; iter; iter = g_list_next (iter)) {
|
|
GstAdaptiveDemuxStream *stream = iter->data;
|
|
GstClockTime offset;
|
|
|
|
offset = gst_adaptive_demux_stream_get_presentation_offset (demux, stream);
|
|
stream->segment = demux->segment;
|
|
|
|
/* The demuxer segment is just built from seek events, but for each stream
|
|
* we have to adjust segments according to the current period and the
|
|
* stream specific presentation time offset.
|
|
*
|
|
* For each period, buffer timestamps start again from 0. Additionally the
|
|
* buffer timestamps are shifted by the stream specific presentation time
|
|
* offset, so the first buffer timestamp of a period is 0 + presentation
|
|
* time offset. If the stream contains timestamps itself, this is also
|
|
* supposed to be the presentation time stored inside the stream.
|
|
*
|
|
* The stream time over periods is supposed to be continuous, that is the
|
|
* buffer timestamp 0 + presentation time offset should map to the start
|
|
* time of the current period.
|
|
*
|
|
*
|
|
* The adjustment of the stream segments as such works the following.
|
|
*
|
|
* If the demuxer segment start is bigger than the period start, this
|
|
* means that we have to drop some media at the beginning of the current
|
|
* period, e.g. because a seek into the middle of the period has
|
|
* happened. The amount of media to drop is the difference between the
|
|
* period start and the demuxer segment start, and as each period starts
|
|
* again from 0, this difference is going to be the actual stream's
|
|
* segment start. As all timestamps of the stream are shifted by the
|
|
* presentation time offset, we will also have to move the segment start
|
|
* by that offset.
|
|
*
|
|
* Likewise, the demuxer segment stop value is adjusted in the same
|
|
* fashion.
|
|
*
|
|
* Now the running time and stream time at the stream's segment start has
|
|
* to be the one that is stored inside the demuxer's segment, which means
|
|
* that segment.base and segment.time have to be copied over (done just
|
|
* above)
|
|
*
|
|
*
|
|
* If the demuxer segment start is smaller than the period start time,
|
|
* this means that the whole period is inside the segment. As each period
|
|
* starts timestamps from 0, and additionally timestamps are shifted by
|
|
* the presentation time offset, the stream's first timestamp (and as such
|
|
* the stream's segment start) has to be the presentation time offset.
|
|
* The stream time at the segment start is supposed to be the stream time
|
|
* of the period start according to the demuxer segment, so the stream
|
|
* segment's time would be set to that. The same goes for the stream
|
|
* segment's base, which is supposed to be the running time of the period
|
|
* start according to the demuxer's segment.
|
|
*
|
|
* The same logic applies for negative rates with the segment stop and
|
|
* the period stop time (which gets clamped).
|
|
*
|
|
*
|
|
* For the first case where not the complete period is inside the segment,
|
|
* the segment time and base as calculated by the second case would be
|
|
* equivalent.
|
|
*/
|
|
GST_DEBUG_OBJECT (demux, "Using demux segment %" GST_SEGMENT_FORMAT,
|
|
&demux->segment);
|
|
GST_DEBUG_OBJECT (demux,
|
|
"period_start: %" GST_TIME_FORMAT " offset: %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (period_start), GST_TIME_ARGS (offset));
|
|
/* note for readers:
|
|
* Since stream->segment is initially a copy of demux->segment,
|
|
* only the values that need updating are modified below. */
|
|
if (first_and_live) {
|
|
/* If first and live, demuxer did seek to the current position already */
|
|
stream->segment.start = demux->segment.start - period_start + offset;
|
|
if (GST_CLOCK_TIME_IS_VALID (demux->segment.stop))
|
|
stream->segment.stop = demux->segment.stop - period_start + offset;
|
|
/* FIXME : Do we need to handle negative rates for this ? */
|
|
stream->segment.position = stream->segment.start;
|
|
} else if (demux->segment.start > period_start) {
|
|
/* seek within a period */
|
|
stream->segment.start = demux->segment.start - period_start + offset;
|
|
if (GST_CLOCK_TIME_IS_VALID (demux->segment.stop))
|
|
stream->segment.stop = demux->segment.stop - period_start + offset;
|
|
if (stream->segment.rate >= 0)
|
|
stream->segment.position = offset;
|
|
else
|
|
stream->segment.position = stream->segment.stop;
|
|
} else {
|
|
stream->segment.start = offset;
|
|
if (GST_CLOCK_TIME_IS_VALID (demux->segment.stop))
|
|
stream->segment.stop = demux->segment.stop - period_start + offset;
|
|
if (stream->segment.rate >= 0)
|
|
stream->segment.position = offset;
|
|
else
|
|
stream->segment.position = stream->segment.stop;
|
|
stream->segment.time =
|
|
gst_segment_to_stream_time (&demux->segment, GST_FORMAT_TIME,
|
|
period_start);
|
|
stream->segment.base =
|
|
gst_segment_to_running_time (&demux->segment, GST_FORMAT_TIME,
|
|
period_start);
|
|
}
|
|
|
|
stream->pending_segment = gst_event_new_segment (&stream->segment);
|
|
gst_event_set_seqnum (stream->pending_segment, demux->priv->segment_seqnum);
|
|
stream->qos_earliest_time = GST_CLOCK_TIME_NONE;
|
|
|
|
GST_DEBUG_OBJECT (demux,
|
|
"Prepared segment %" GST_SEGMENT_FORMAT " for stream %p",
|
|
&stream->segment, stream);
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_adaptive_demux_expose_streams (GstAdaptiveDemux * demux)
|
|
{
|
|
GList *iter;
|
|
GList *old_streams;
|
|
|
|
g_return_val_if_fail (demux->prepared_streams != NULL, FALSE);
|
|
|
|
old_streams = demux->streams;
|
|
demux->streams = demux->prepared_streams;
|
|
demux->prepared_streams = NULL;
|
|
|
|
for (iter = demux->streams; iter; iter = g_list_next (iter)) {
|
|
GstAdaptiveDemuxStream *stream = iter->data;
|
|
|
|
if (!gst_adaptive_demux_expose_stream (demux,
|
|
GST_ADAPTIVE_DEMUX_STREAM_CAST (stream))) {
|
|
/* TODO act on error */
|
|
}
|
|
}
|
|
demux->priv->preroll_pending = 0;
|
|
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
gst_element_no_more_pads (GST_ELEMENT_CAST (demux));
|
|
GST_MANIFEST_LOCK (demux);
|
|
|
|
if (old_streams) {
|
|
GstEvent *eos = gst_event_new_eos ();
|
|
|
|
/* before we put streams in the demux->priv->old_streams list,
|
|
* we ask the download task to stop. In this way, it will no longer be
|
|
* allowed to change the demux object.
|
|
*/
|
|
for (iter = old_streams; iter; iter = g_list_next (iter)) {
|
|
GstAdaptiveDemuxStream *stream = iter->data;
|
|
GstPad *pad = gst_object_ref (GST_PAD (stream->pad));
|
|
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
|
|
GST_DEBUG_OBJECT (pad, "Pushing EOS");
|
|
gst_pad_push_event (pad, gst_event_ref (eos));
|
|
gst_pad_set_active (pad, FALSE);
|
|
|
|
GST_LOG_OBJECT (pad, "Removing stream");
|
|
gst_element_remove_pad (GST_ELEMENT (demux), pad);
|
|
GST_MANIFEST_LOCK (demux);
|
|
|
|
gst_object_unref (GST_OBJECT (pad));
|
|
|
|
/* ask the download task to stop.
|
|
* We will not join it now, because our thread can be one of these tasks.
|
|
* We will do the joining later, from another stream download task or
|
|
* from gst_adaptive_demux_stop_tasks.
|
|
* We also cannot change the state of the stream->src element, because
|
|
* that will wait on the streaming thread (which could be this thread)
|
|
* to stop first.
|
|
* Because we sent an EOS to the downstream element, the stream->src
|
|
* element should detect this in its streaming task and stop.
|
|
* Even if it doesn't do that, we will change its state later in
|
|
* gst_adaptive_demux_stop_tasks.
|
|
*/
|
|
GST_LOG_OBJECT (stream, "Marking stream as cancelled");
|
|
gst_task_stop (stream->download_task);
|
|
g_mutex_lock (&stream->fragment_download_lock);
|
|
stream->cancelled = TRUE;
|
|
stream->replaced = TRUE;
|
|
g_cond_signal (&stream->fragment_download_cond);
|
|
g_mutex_unlock (&stream->fragment_download_lock);
|
|
}
|
|
gst_event_unref (eos);
|
|
|
|
/* The list should be freed from another thread as we can't properly
|
|
* cleanup a GstTask from itself */
|
|
demux->priv->old_streams =
|
|
g_list_concat (demux->priv->old_streams, old_streams);
|
|
}
|
|
|
|
/* Unblock after removing oldstreams */
|
|
for (iter = demux->streams; iter; iter = g_list_next (iter)) {
|
|
GstAdaptiveDemuxStream *stream = iter->data;
|
|
stream->do_block = FALSE;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (demux, "All streams are exposed");
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* must be called with manifest_lock taken */
|
|
GstAdaptiveDemuxStream *
|
|
gst_adaptive_demux_stream_new (GstAdaptiveDemux * demux, GstPad * pad)
|
|
{
|
|
GstAdaptiveDemuxStream *stream;
|
|
|
|
stream = g_malloc0 (demux->stream_struct_size);
|
|
|
|
/* Downloading task */
|
|
g_rec_mutex_init (&stream->download_lock);
|
|
stream->download_task =
|
|
gst_task_new ((GstTaskFunction) gst_adaptive_demux_stream_download_loop,
|
|
stream, NULL);
|
|
gst_task_set_lock (stream->download_task, &stream->download_lock);
|
|
|
|
stream->pad = pad;
|
|
stream->demux = demux;
|
|
stream->fragment_bitrates =
|
|
g_malloc0 (sizeof (guint64) * NUM_LOOKBACK_FRAGMENTS);
|
|
gst_pad_set_element_private (pad, stream);
|
|
stream->qos_earliest_time = GST_CLOCK_TIME_NONE;
|
|
|
|
g_mutex_lock (&demux->priv->preroll_lock);
|
|
stream->do_block = TRUE;
|
|
demux->priv->preroll_pending++;
|
|
g_mutex_unlock (&demux->priv->preroll_lock);
|
|
|
|
gst_pad_set_query_function (pad,
|
|
GST_DEBUG_FUNCPTR (gst_adaptive_demux_src_query));
|
|
gst_pad_set_event_function (pad,
|
|
GST_DEBUG_FUNCPTR (gst_adaptive_demux_src_event));
|
|
|
|
gst_segment_init (&stream->segment, GST_FORMAT_TIME);
|
|
g_cond_init (&stream->fragment_download_cond);
|
|
g_mutex_init (&stream->fragment_download_lock);
|
|
|
|
demux->next_streams = g_list_append (demux->next_streams, stream);
|
|
|
|
return stream;
|
|
}
|
|
|
|
GstAdaptiveDemuxStream *
|
|
gst_adaptive_demux_find_stream_for_pad (GstAdaptiveDemux * demux, GstPad * pad)
|
|
{
|
|
GList *iter;
|
|
|
|
for (iter = demux->streams; iter; iter = g_list_next (iter)) {
|
|
GstAdaptiveDemuxStream *stream = iter->data;
|
|
if (stream->pad == pad) {
|
|
return stream;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* must be called with manifest_lock taken.
|
|
* It will temporarily drop the manifest_lock in order to join the task.
|
|
* It will join only the old_streams (the demux->streams are joined by
|
|
* gst_adaptive_demux_stop_tasks before gst_adaptive_demux_stream_free is
|
|
* called)
|
|
*/
|
|
static void
|
|
gst_adaptive_demux_stream_free (GstAdaptiveDemuxStream * stream)
|
|
{
|
|
GstAdaptiveDemux *demux = stream->demux;
|
|
GstAdaptiveDemuxClass *klass = GST_ADAPTIVE_DEMUX_GET_CLASS (demux);
|
|
|
|
if (klass->stream_free)
|
|
klass->stream_free (stream);
|
|
|
|
g_clear_error (&stream->last_error);
|
|
if (stream->download_task) {
|
|
if (GST_TASK_STATE (stream->download_task) != GST_TASK_STOPPED) {
|
|
GST_DEBUG_OBJECT (demux, "Leaving streaming task %s:%s",
|
|
GST_DEBUG_PAD_NAME (stream->pad));
|
|
|
|
gst_task_stop (stream->download_task);
|
|
|
|
g_mutex_lock (&stream->fragment_download_lock);
|
|
stream->cancelled = TRUE;
|
|
g_cond_signal (&stream->fragment_download_cond);
|
|
g_mutex_unlock (&stream->fragment_download_lock);
|
|
}
|
|
GST_LOG_OBJECT (demux, "Waiting for task to finish");
|
|
|
|
/* temporarily drop the manifest lock to join the task */
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
|
|
gst_task_join (stream->download_task);
|
|
|
|
GST_MANIFEST_LOCK (demux);
|
|
|
|
GST_LOG_OBJECT (demux, "Finished");
|
|
gst_object_unref (stream->download_task);
|
|
g_rec_mutex_clear (&stream->download_lock);
|
|
stream->download_task = NULL;
|
|
}
|
|
|
|
gst_adaptive_demux_stream_fragment_clear (&stream->fragment);
|
|
|
|
if (stream->pending_segment) {
|
|
gst_event_unref (stream->pending_segment);
|
|
stream->pending_segment = NULL;
|
|
}
|
|
|
|
if (stream->pending_events) {
|
|
g_list_free_full (stream->pending_events, (GDestroyNotify) gst_event_unref);
|
|
stream->pending_events = NULL;
|
|
}
|
|
|
|
if (stream->internal_pad) {
|
|
gst_object_unparent (GST_OBJECT_CAST (stream->internal_pad));
|
|
}
|
|
|
|
if (stream->src_srcpad) {
|
|
gst_object_unref (stream->src_srcpad);
|
|
stream->src_srcpad = NULL;
|
|
}
|
|
|
|
if (stream->src) {
|
|
GstElement *src = stream->src;
|
|
|
|
stream->src = NULL;
|
|
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
gst_element_set_locked_state (src, TRUE);
|
|
gst_element_set_state (src, GST_STATE_NULL);
|
|
gst_bin_remove (GST_BIN_CAST (demux), src);
|
|
GST_MANIFEST_LOCK (demux);
|
|
}
|
|
|
|
g_cond_clear (&stream->fragment_download_cond);
|
|
g_mutex_clear (&stream->fragment_download_lock);
|
|
g_free (stream->fragment_bitrates);
|
|
|
|
if (stream->pad) {
|
|
gst_object_unref (stream->pad);
|
|
stream->pad = NULL;
|
|
}
|
|
if (stream->pending_caps)
|
|
gst_caps_unref (stream->pending_caps);
|
|
|
|
g_clear_pointer (&stream->pending_tags, gst_tag_list_unref);
|
|
|
|
g_free (stream);
|
|
}
|
|
|
|
/* must be called with manifest_lock taken */
|
|
static gboolean
|
|
gst_adaptive_demux_get_live_seek_range (GstAdaptiveDemux * demux,
|
|
gint64 * range_start, gint64 * range_stop)
|
|
{
|
|
GstAdaptiveDemuxClass *klass;
|
|
|
|
klass = GST_ADAPTIVE_DEMUX_GET_CLASS (demux);
|
|
|
|
g_return_val_if_fail (klass->get_live_seek_range, FALSE);
|
|
|
|
return klass->get_live_seek_range (demux, range_start, range_stop);
|
|
}
|
|
|
|
/* must be called with manifest_lock taken */
|
|
static gboolean
|
|
gst_adaptive_demux_stream_in_live_seek_range (GstAdaptiveDemux * demux,
|
|
GstAdaptiveDemuxStream * stream)
|
|
{
|
|
gint64 range_start, range_stop;
|
|
if (gst_adaptive_demux_get_live_seek_range (demux, &range_start, &range_stop)) {
|
|
GST_LOG_OBJECT (stream->pad,
|
|
"stream position %" GST_TIME_FORMAT " live seek range %"
|
|
GST_STIME_FORMAT " - %" GST_STIME_FORMAT,
|
|
GST_TIME_ARGS (stream->segment.position), GST_STIME_ARGS (range_start),
|
|
GST_STIME_ARGS (range_stop));
|
|
return (stream->segment.position >= range_start
|
|
&& stream->segment.position <= range_stop);
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
/* must be called with manifest_lock taken */
|
|
static gboolean
|
|
gst_adaptive_demux_can_seek (GstAdaptiveDemux * demux)
|
|
{
|
|
GstAdaptiveDemuxClass *klass;
|
|
|
|
klass = GST_ADAPTIVE_DEMUX_GET_CLASS (demux);
|
|
if (gst_adaptive_demux_is_live (demux)) {
|
|
return klass->get_live_seek_range != NULL;
|
|
}
|
|
|
|
return klass->seek != NULL;
|
|
}
|
|
|
|
static void
|
|
gst_adaptive_demux_update_streams_segment (GstAdaptiveDemux * demux,
|
|
GList * streams, gint64 period_start, GstSeekType start_type,
|
|
GstSeekType stop_type)
|
|
{
|
|
GList *iter;
|
|
for (iter = streams; iter; iter = g_list_next (iter)) {
|
|
GstAdaptiveDemuxStream *stream = iter->data;
|
|
GstEvent *seg_evt;
|
|
GstClockTime offset;
|
|
|
|
/* See comments in gst_adaptive_demux_get_period_start_time() for
|
|
* an explanation of the segment modifications */
|
|
stream->segment = demux->segment;
|
|
offset = gst_adaptive_demux_stream_get_presentation_offset (demux, stream);
|
|
stream->segment.start += offset - period_start;
|
|
if (GST_CLOCK_TIME_IS_VALID (demux->segment.stop))
|
|
stream->segment.stop += offset - period_start;
|
|
if (demux->segment.rate > 0 && start_type != GST_SEEK_TYPE_NONE)
|
|
stream->segment.position = stream->segment.start;
|
|
else if (demux->segment.rate < 0 && stop_type != GST_SEEK_TYPE_NONE)
|
|
stream->segment.position = stream->segment.stop;
|
|
seg_evt = gst_event_new_segment (&stream->segment);
|
|
gst_event_set_seqnum (seg_evt, demux->priv->segment_seqnum);
|
|
gst_event_replace (&stream->pending_segment, seg_evt);
|
|
GST_DEBUG_OBJECT (stream->pad, "Pending segment now %" GST_PTR_FORMAT,
|
|
stream->pending_segment);
|
|
gst_event_unref (seg_evt);
|
|
/* Make sure the first buffer after a seek has the discont flag */
|
|
stream->discont = TRUE;
|
|
stream->qos_earliest_time = GST_CLOCK_TIME_NONE;
|
|
}
|
|
}
|
|
|
|
#define IS_SNAP_SEEK(f) (f & (GST_SEEK_FLAG_SNAP_BEFORE | \
|
|
GST_SEEK_FLAG_SNAP_AFTER | \
|
|
GST_SEEK_FLAG_SNAP_NEAREST | \
|
|
GST_SEEK_FLAG_TRICKMODE_KEY_UNITS | \
|
|
GST_SEEK_FLAG_KEY_UNIT))
|
|
#define REMOVE_SNAP_FLAGS(f) (f & ~(GST_SEEK_FLAG_SNAP_BEFORE | \
|
|
GST_SEEK_FLAG_SNAP_AFTER | \
|
|
GST_SEEK_FLAG_SNAP_NEAREST))
|
|
|
|
static gboolean
|
|
gst_adaptive_demux_handle_seek_event (GstAdaptiveDemux * demux, GstPad * pad,
|
|
GstEvent * event)
|
|
{
|
|
GstAdaptiveDemuxClass *demux_class = GST_ADAPTIVE_DEMUX_GET_CLASS (demux);
|
|
gdouble rate;
|
|
GstFormat format;
|
|
GstSeekFlags flags;
|
|
GstSeekType start_type, stop_type;
|
|
gint64 start, stop;
|
|
guint32 seqnum;
|
|
gboolean update;
|
|
gboolean ret;
|
|
GstSegment oldsegment;
|
|
GstAdaptiveDemuxStream *stream = NULL;
|
|
|
|
GST_INFO_OBJECT (demux, "Received seek event");
|
|
|
|
GST_API_LOCK (demux);
|
|
GST_MANIFEST_LOCK (demux);
|
|
|
|
if (!gst_adaptive_demux_can_seek (demux)) {
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
GST_API_UNLOCK (demux);
|
|
gst_event_unref (event);
|
|
return FALSE;
|
|
}
|
|
|
|
gst_event_parse_seek (event, &rate, &format, &flags, &start_type, &start,
|
|
&stop_type, &stop);
|
|
|
|
if (format != GST_FORMAT_TIME) {
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
GST_API_UNLOCK (demux);
|
|
GST_WARNING_OBJECT (demux,
|
|
"Adaptive demuxers only support TIME-based seeking");
|
|
gst_event_unref (event);
|
|
return FALSE;
|
|
}
|
|
|
|
if (flags & GST_SEEK_FLAG_SEGMENT) {
|
|
GST_FIXME_OBJECT (demux, "Handle segment seeks");
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
GST_API_UNLOCK (demux);
|
|
gst_event_unref (event);
|
|
return FALSE;
|
|
}
|
|
|
|
seqnum = gst_event_get_seqnum (event);
|
|
|
|
if (gst_adaptive_demux_is_live (demux)) {
|
|
gint64 range_start, range_stop;
|
|
gboolean changed = FALSE;
|
|
gboolean start_valid = TRUE, stop_valid = TRUE;
|
|
|
|
if (!gst_adaptive_demux_get_live_seek_range (demux, &range_start,
|
|
&range_stop)) {
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
GST_API_UNLOCK (demux);
|
|
gst_event_unref (event);
|
|
GST_WARNING_OBJECT (demux, "Failure getting the live seek ranges");
|
|
return FALSE;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (demux,
|
|
"Live range is %" GST_STIME_FORMAT " %" GST_STIME_FORMAT,
|
|
GST_STIME_ARGS (range_start), GST_STIME_ARGS (range_stop));
|
|
|
|
/* Handle relative positioning for live streams (relative to the range_stop) */
|
|
if (start_type == GST_SEEK_TYPE_END) {
|
|
start = range_stop + start;
|
|
start_type = GST_SEEK_TYPE_SET;
|
|
changed = TRUE;
|
|
}
|
|
if (stop_type == GST_SEEK_TYPE_END) {
|
|
stop = range_stop + stop;
|
|
stop_type = GST_SEEK_TYPE_SET;
|
|
changed = TRUE;
|
|
}
|
|
|
|
/* Adjust the requested start/stop position if it falls beyond the live
|
|
* seek range.
|
|
* The only case where we don't adjust is for the starting point of
|
|
* an accurate seek (start if forward and stop if backwards)
|
|
*/
|
|
if (start_type == GST_SEEK_TYPE_SET && start < range_start &&
|
|
(rate < 0 || !(flags & GST_SEEK_FLAG_ACCURATE))) {
|
|
GST_DEBUG_OBJECT (demux,
|
|
"seek before live stream start, setting to range start: %"
|
|
GST_TIME_FORMAT, GST_TIME_ARGS (range_start));
|
|
start = range_start;
|
|
changed = TRUE;
|
|
}
|
|
/* truncate stop position also if set */
|
|
if (stop_type == GST_SEEK_TYPE_SET && stop > range_stop &&
|
|
(rate > 0 || !(flags & GST_SEEK_FLAG_ACCURATE))) {
|
|
GST_DEBUG_OBJECT (demux,
|
|
"seek ending after live start, adjusting to: %"
|
|
GST_TIME_FORMAT, GST_TIME_ARGS (range_stop));
|
|
stop = range_stop;
|
|
changed = TRUE;
|
|
}
|
|
|
|
if (start_type == GST_SEEK_TYPE_SET && GST_CLOCK_TIME_IS_VALID (start) &&
|
|
(start < range_start || start > range_stop)) {
|
|
GST_WARNING_OBJECT (demux,
|
|
"Seek to invalid position start:%" GST_STIME_FORMAT
|
|
" out of seekable range (%" GST_STIME_FORMAT " - %" GST_STIME_FORMAT
|
|
")", GST_STIME_ARGS (start), GST_STIME_ARGS (range_start),
|
|
GST_STIME_ARGS (range_stop));
|
|
start_valid = FALSE;
|
|
}
|
|
if (stop_type == GST_SEEK_TYPE_SET && GST_CLOCK_TIME_IS_VALID (stop) &&
|
|
(stop < range_start || stop > range_stop)) {
|
|
GST_WARNING_OBJECT (demux,
|
|
"Seek to invalid position stop:%" GST_STIME_FORMAT
|
|
" out of seekable range (%" GST_STIME_FORMAT " - %" GST_STIME_FORMAT
|
|
")", GST_STIME_ARGS (stop), GST_STIME_ARGS (range_start),
|
|
GST_STIME_ARGS (range_stop));
|
|
stop_valid = FALSE;
|
|
}
|
|
|
|
/* If the seek position is still outside of the seekable range, refuse the seek */
|
|
if (!start_valid || !stop_valid) {
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
GST_API_UNLOCK (demux);
|
|
gst_event_unref (event);
|
|
return FALSE;
|
|
}
|
|
|
|
/* Re-create seek event with changed/updated values */
|
|
if (changed) {
|
|
gst_event_unref (event);
|
|
event =
|
|
gst_event_new_seek (rate, format, flags,
|
|
start_type, start, stop_type, stop);
|
|
gst_event_set_seqnum (event, seqnum);
|
|
}
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (demux, "seek event, %" GST_PTR_FORMAT, event);
|
|
|
|
/* have a backup in case seek fails */
|
|
gst_segment_copy_into (&demux->segment, &oldsegment);
|
|
|
|
if (flags & GST_SEEK_FLAG_FLUSH) {
|
|
GstEvent *fevent;
|
|
|
|
GST_DEBUG_OBJECT (demux, "sending flush start");
|
|
fevent = gst_event_new_flush_start ();
|
|
gst_event_set_seqnum (fevent, seqnum);
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
gst_adaptive_demux_push_src_event (demux, fevent);
|
|
GST_MANIFEST_LOCK (demux);
|
|
|
|
gst_adaptive_demux_stop_tasks (demux, FALSE);
|
|
} else if ((rate > 0 && start_type != GST_SEEK_TYPE_NONE) ||
|
|
(rate < 0 && stop_type != GST_SEEK_TYPE_NONE)) {
|
|
|
|
gst_adaptive_demux_stop_tasks (demux, FALSE);
|
|
}
|
|
|
|
GST_ADAPTIVE_DEMUX_SEGMENT_LOCK (demux);
|
|
|
|
/*
|
|
* Handle snap seeks as follows:
|
|
* 1) do the snap seeking on the stream that received
|
|
* the event
|
|
* 2) use the final position on this stream to seek
|
|
* on the other streams to the same position
|
|
*
|
|
* We can't snap at all streams at the same time as
|
|
* they might end in different positions, so just
|
|
* use the one that received the event as the 'leading'
|
|
* one to do the snap seek.
|
|
*/
|
|
if (IS_SNAP_SEEK (flags) && demux_class->stream_seek && (stream =
|
|
gst_adaptive_demux_find_stream_for_pad (demux, pad))) {
|
|
GstClockTime ts;
|
|
GstSeekFlags stream_seek_flags = flags;
|
|
|
|
/* snap-seek on the stream that received the event and then
|
|
* use the resulting position to seek on all streams */
|
|
|
|
if (rate >= 0) {
|
|
if (start_type != GST_SEEK_TYPE_NONE)
|
|
ts = start;
|
|
else {
|
|
ts = stream->segment.position;
|
|
start_type = GST_SEEK_TYPE_SET;
|
|
}
|
|
} else {
|
|
if (stop_type != GST_SEEK_TYPE_NONE)
|
|
ts = stop;
|
|
else {
|
|
stop_type = GST_SEEK_TYPE_SET;
|
|
ts = stream->segment.position;
|
|
}
|
|
}
|
|
|
|
if (stream) {
|
|
demux_class->stream_seek (stream, rate >= 0, stream_seek_flags, ts, &ts);
|
|
}
|
|
|
|
/* replace event with a new one without snaping to seek on all streams */
|
|
gst_event_unref (event);
|
|
if (rate >= 0) {
|
|
start = ts;
|
|
} else {
|
|
stop = ts;
|
|
}
|
|
event =
|
|
gst_event_new_seek (rate, format, REMOVE_SNAP_FLAGS (flags),
|
|
start_type, start, stop_type, stop);
|
|
GST_DEBUG_OBJECT (demux, "Adapted snap seek to %" GST_PTR_FORMAT, event);
|
|
}
|
|
stream = NULL;
|
|
|
|
gst_segment_do_seek (&demux->segment, rate, format, flags, start_type,
|
|
start, stop_type, stop, &update);
|
|
|
|
/* FIXME - this seems unatural, do_seek() is updating base when we
|
|
* only want the start/stop position to change, maybe do_seek() needs
|
|
* some fixing? */
|
|
if (!(flags & GST_SEEK_FLAG_FLUSH) && ((rate > 0
|
|
&& start_type == GST_SEEK_TYPE_NONE) || (rate < 0
|
|
&& stop_type == GST_SEEK_TYPE_NONE))) {
|
|
demux->segment.base = oldsegment.base;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (demux, "Calling subclass seek: %" GST_PTR_FORMAT, event);
|
|
|
|
ret = demux_class->seek (demux, event);
|
|
|
|
if (!ret) {
|
|
/* Is there anything else we can do if it fails? */
|
|
gst_segment_copy_into (&oldsegment, &demux->segment);
|
|
} else {
|
|
demux->priv->segment_seqnum = seqnum;
|
|
}
|
|
GST_ADAPTIVE_DEMUX_SEGMENT_UNLOCK (demux);
|
|
|
|
if (flags & GST_SEEK_FLAG_FLUSH) {
|
|
GstEvent *fevent;
|
|
|
|
GST_DEBUG_OBJECT (demux, "Sending flush stop on all pad");
|
|
fevent = gst_event_new_flush_stop (TRUE);
|
|
gst_event_set_seqnum (fevent, seqnum);
|
|
gst_adaptive_demux_push_src_event (demux, fevent);
|
|
}
|
|
|
|
if (demux->next_streams) {
|
|
/* If the seek generated new streams, get them
|
|
* to preroll */
|
|
gst_adaptive_demux_prepare_streams (demux, FALSE);
|
|
gst_adaptive_demux_start_tasks (demux, TRUE);
|
|
} else {
|
|
GstClockTime period_start =
|
|
gst_adaptive_demux_get_period_start_time (demux);
|
|
|
|
GST_ADAPTIVE_DEMUX_SEGMENT_LOCK (demux);
|
|
gst_adaptive_demux_update_streams_segment (demux, demux->streams,
|
|
period_start, start_type, stop_type);
|
|
gst_adaptive_demux_update_streams_segment (demux, demux->prepared_streams,
|
|
period_start, start_type, stop_type);
|
|
GST_ADAPTIVE_DEMUX_SEGMENT_UNLOCK (demux);
|
|
|
|
/* Restart the demux */
|
|
gst_adaptive_demux_start_tasks (demux, FALSE);
|
|
}
|
|
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
GST_API_UNLOCK (demux);
|
|
gst_event_unref (event);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_adaptive_demux_src_event (GstPad * pad, GstObject * parent,
|
|
GstEvent * event)
|
|
{
|
|
GstAdaptiveDemux *demux;
|
|
|
|
demux = GST_ADAPTIVE_DEMUX_CAST (parent);
|
|
|
|
/* FIXME handle events received on pads that are to be removed */
|
|
|
|
switch (event->type) {
|
|
case GST_EVENT_SEEK:
|
|
{
|
|
guint32 seqnum = gst_event_get_seqnum (event);
|
|
if (seqnum == demux->priv->segment_seqnum) {
|
|
GST_LOG_OBJECT (pad,
|
|
"Drop duplicated SEEK event seqnum %" G_GUINT32_FORMAT, seqnum);
|
|
gst_event_unref (event);
|
|
return TRUE;
|
|
}
|
|
return gst_adaptive_demux_handle_seek_event (demux, pad, event);
|
|
}
|
|
case GST_EVENT_RECONFIGURE:{
|
|
GstAdaptiveDemuxStream *stream;
|
|
|
|
GST_MANIFEST_LOCK (demux);
|
|
stream = gst_adaptive_demux_find_stream_for_pad (demux, pad);
|
|
|
|
if (stream) {
|
|
if (!stream->cancelled && demux->running &&
|
|
stream->last_ret == GST_FLOW_NOT_LINKED) {
|
|
stream->last_ret = GST_FLOW_OK;
|
|
stream->restart_download = TRUE;
|
|
stream->need_header = TRUE;
|
|
stream->discont = TRUE;
|
|
GST_DEBUG_OBJECT (stream->pad, "Restarting download loop");
|
|
gst_task_start (stream->download_task);
|
|
}
|
|
gst_event_unref (event);
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
return TRUE;
|
|
}
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
}
|
|
break;
|
|
case GST_EVENT_LATENCY:{
|
|
/* Upstream and our internal source are irrelevant
|
|
* for latency, and we should not fail here to
|
|
* configure the latency */
|
|
gst_event_unref (event);
|
|
return TRUE;
|
|
}
|
|
case GST_EVENT_QOS:{
|
|
GstAdaptiveDemuxStream *stream;
|
|
|
|
GST_MANIFEST_LOCK (demux);
|
|
stream = gst_adaptive_demux_find_stream_for_pad (demux, pad);
|
|
|
|
if (stream) {
|
|
GstClockTimeDiff diff;
|
|
GstClockTime timestamp;
|
|
|
|
gst_event_parse_qos (event, NULL, NULL, &diff, ×tamp);
|
|
/* Only take into account lateness if late */
|
|
if (diff > 0)
|
|
stream->qos_earliest_time = timestamp + 2 * diff;
|
|
else
|
|
stream->qos_earliest_time = timestamp;
|
|
GST_DEBUG_OBJECT (stream->pad, "qos_earliest_time %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (stream->qos_earliest_time));
|
|
}
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return gst_pad_event_default (pad, parent, event);
|
|
}
|
|
|
|
static gboolean
|
|
gst_adaptive_demux_src_query (GstPad * pad, GstObject * parent,
|
|
GstQuery * query)
|
|
{
|
|
GstAdaptiveDemux *demux;
|
|
GstAdaptiveDemuxClass *demux_class;
|
|
gboolean ret = FALSE;
|
|
|
|
if (query == NULL)
|
|
return FALSE;
|
|
|
|
demux = GST_ADAPTIVE_DEMUX_CAST (parent);
|
|
demux_class = GST_ADAPTIVE_DEMUX_GET_CLASS (demux);
|
|
|
|
switch (query->type) {
|
|
case GST_QUERY_DURATION:{
|
|
GstClockTime duration = -1;
|
|
GstFormat fmt;
|
|
|
|
gst_query_parse_duration (query, &fmt, NULL);
|
|
|
|
GST_MANIFEST_LOCK (demux);
|
|
|
|
if (fmt == GST_FORMAT_TIME && demux->priv->have_manifest) {
|
|
duration = demux_class->get_duration (demux);
|
|
|
|
if (GST_CLOCK_TIME_IS_VALID (duration) && duration > 0) {
|
|
gst_query_set_duration (query, GST_FORMAT_TIME, duration);
|
|
ret = TRUE;
|
|
}
|
|
}
|
|
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
|
|
GST_LOG_OBJECT (demux, "GST_QUERY_DURATION returns %s with duration %"
|
|
GST_TIME_FORMAT, ret ? "TRUE" : "FALSE", GST_TIME_ARGS (duration));
|
|
break;
|
|
}
|
|
case GST_QUERY_LATENCY:{
|
|
gst_query_set_latency (query, FALSE, 0, -1);
|
|
ret = TRUE;
|
|
break;
|
|
}
|
|
case GST_QUERY_SEEKING:{
|
|
GstFormat fmt;
|
|
gint64 stop = -1;
|
|
gint64 start = 0;
|
|
|
|
GST_MANIFEST_LOCK (demux);
|
|
|
|
if (!demux->priv->have_manifest) {
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
GST_INFO_OBJECT (demux,
|
|
"Don't have manifest yet, can't answer seeking query");
|
|
return FALSE; /* can't answer without manifest */
|
|
}
|
|
|
|
gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL);
|
|
GST_INFO_OBJECT (demux, "Received GST_QUERY_SEEKING with format %d", fmt);
|
|
if (fmt == GST_FORMAT_TIME) {
|
|
GstClockTime duration;
|
|
gboolean can_seek = gst_adaptive_demux_can_seek (demux);
|
|
|
|
ret = TRUE;
|
|
if (can_seek) {
|
|
if (gst_adaptive_demux_is_live (demux)) {
|
|
ret = gst_adaptive_demux_get_live_seek_range (demux, &start, &stop);
|
|
if (!ret) {
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
GST_INFO_OBJECT (demux, "can't answer seeking query");
|
|
return FALSE;
|
|
}
|
|
} else {
|
|
duration = demux_class->get_duration (demux);
|
|
if (GST_CLOCK_TIME_IS_VALID (duration) && duration > 0)
|
|
stop = duration;
|
|
}
|
|
}
|
|
gst_query_set_seeking (query, fmt, can_seek, start, stop);
|
|
GST_INFO_OBJECT (demux, "GST_QUERY_SEEKING returning with start : %"
|
|
GST_TIME_FORMAT ", stop : %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (start), GST_TIME_ARGS (stop));
|
|
}
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
break;
|
|
}
|
|
case GST_QUERY_URI:
|
|
|
|
GST_MANIFEST_LOCK (demux);
|
|
|
|
/* TODO HLS can answer this differently it seems */
|
|
if (demux->manifest_uri) {
|
|
/* FIXME: (hls) Do we answer with the variant playlist, with the current
|
|
* playlist or the the uri of the last downlowaded fragment? */
|
|
gst_query_set_uri (query, demux->manifest_uri);
|
|
ret = TRUE;
|
|
}
|
|
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
break;
|
|
default:
|
|
/* Don't forward queries upstream because of the special nature of this
|
|
* "demuxer", which relies on the upstream element only to be fed
|
|
* the Manifest
|
|
*/
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* must be called with manifest_lock taken */
|
|
static void
|
|
gst_adaptive_demux_start_tasks (GstAdaptiveDemux * demux,
|
|
gboolean start_preroll_streams)
|
|
{
|
|
GList *iter;
|
|
|
|
if (!demux->running) {
|
|
GST_DEBUG_OBJECT (demux, "Not starting tasks due to shutdown");
|
|
return;
|
|
}
|
|
|
|
GST_INFO_OBJECT (demux, "Starting streams' tasks");
|
|
|
|
iter = start_preroll_streams ? demux->prepared_streams : demux->streams;
|
|
|
|
for (; iter; iter = g_list_next (iter)) {
|
|
GstAdaptiveDemuxStream *stream = iter->data;
|
|
|
|
if (!start_preroll_streams) {
|
|
g_mutex_lock (&stream->fragment_download_lock);
|
|
stream->cancelled = FALSE;
|
|
stream->replaced = FALSE;
|
|
g_mutex_unlock (&stream->fragment_download_lock);
|
|
}
|
|
|
|
stream->last_ret = GST_FLOW_OK;
|
|
gst_task_start (stream->download_task);
|
|
}
|
|
}
|
|
|
|
/* must be called with manifest_lock taken */
|
|
static void
|
|
gst_adaptive_demux_stop_manifest_update_task (GstAdaptiveDemux * demux)
|
|
{
|
|
gst_uri_downloader_cancel (demux->downloader);
|
|
|
|
gst_task_stop (demux->priv->updates_task);
|
|
|
|
g_mutex_lock (&demux->priv->updates_timed_lock);
|
|
GST_DEBUG_OBJECT (demux, "requesting stop of the manifest update task");
|
|
demux->priv->stop_updates_task = TRUE;
|
|
g_cond_signal (&demux->priv->updates_timed_cond);
|
|
g_mutex_unlock (&demux->priv->updates_timed_lock);
|
|
}
|
|
|
|
/* must be called with manifest_lock taken */
|
|
static void
|
|
gst_adaptive_demux_start_manifest_update_task (GstAdaptiveDemux * demux)
|
|
{
|
|
GstAdaptiveDemuxClass *demux_class = GST_ADAPTIVE_DEMUX_GET_CLASS (demux);
|
|
|
|
if (gst_adaptive_demux_is_live (demux)) {
|
|
gst_uri_downloader_reset (demux->downloader);
|
|
g_mutex_lock (&demux->priv->updates_timed_lock);
|
|
demux->priv->stop_updates_task = FALSE;
|
|
g_mutex_unlock (&demux->priv->updates_timed_lock);
|
|
/* Task to periodically update the manifest */
|
|
if (demux_class->requires_periodical_playlist_update (demux)) {
|
|
GST_DEBUG_OBJECT (demux, "requesting start of the manifest update task");
|
|
gst_task_start (demux->priv->updates_task);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* must be called with manifest_lock taken
|
|
* This function will temporarily release manifest_lock in order to join the
|
|
* download threads.
|
|
* The api_lock will still protect it against other threads trying to modify
|
|
* the demux element.
|
|
*/
|
|
static void
|
|
gst_adaptive_demux_stop_tasks (GstAdaptiveDemux * demux, gboolean stop_updates)
|
|
{
|
|
int i;
|
|
GList *iter;
|
|
GList *list_to_process;
|
|
|
|
GST_LOG_OBJECT (demux, "Stopping tasks");
|
|
|
|
if (stop_updates)
|
|
gst_adaptive_demux_stop_manifest_update_task (demux);
|
|
|
|
list_to_process = demux->streams;
|
|
for (i = 0; i < 2; ++i) {
|
|
for (iter = list_to_process; iter; iter = g_list_next (iter)) {
|
|
GstAdaptiveDemuxStream *stream = iter->data;
|
|
|
|
g_mutex_lock (&stream->fragment_download_lock);
|
|
stream->cancelled = TRUE;
|
|
gst_task_stop (stream->download_task);
|
|
g_cond_signal (&stream->fragment_download_cond);
|
|
g_mutex_unlock (&stream->fragment_download_lock);
|
|
}
|
|
list_to_process = demux->prepared_streams;
|
|
}
|
|
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
g_mutex_lock (&demux->priv->preroll_lock);
|
|
g_cond_broadcast (&demux->priv->preroll_cond);
|
|
g_mutex_unlock (&demux->priv->preroll_lock);
|
|
GST_MANIFEST_LOCK (demux);
|
|
|
|
g_mutex_lock (&demux->priv->manifest_update_lock);
|
|
g_cond_broadcast (&demux->priv->manifest_cond);
|
|
g_mutex_unlock (&demux->priv->manifest_update_lock);
|
|
|
|
/* need to release manifest_lock before stopping the src element.
|
|
* The streams were asked to cancel, so they will not make any writes to demux
|
|
* object. Even if we temporarily release manifest_lock, the demux->streams
|
|
* cannot change and iter cannot be invalidated.
|
|
*/
|
|
list_to_process = demux->streams;
|
|
for (i = 0; i < 2; ++i) {
|
|
for (iter = list_to_process; iter; iter = g_list_next (iter)) {
|
|
GstAdaptiveDemuxStream *stream = iter->data;
|
|
GstElement *src = stream->src;
|
|
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
|
|
if (src) {
|
|
gst_element_set_locked_state (src, TRUE);
|
|
gst_element_set_state (src, GST_STATE_READY);
|
|
}
|
|
|
|
/* stream->download_task value never changes, so it is safe to read it
|
|
* outside critical section
|
|
*/
|
|
gst_task_join (stream->download_task);
|
|
|
|
GST_MANIFEST_LOCK (demux);
|
|
}
|
|
list_to_process = demux->prepared_streams;
|
|
}
|
|
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
if (stop_updates)
|
|
gst_task_join (demux->priv->updates_task);
|
|
|
|
GST_MANIFEST_LOCK (demux);
|
|
|
|
list_to_process = demux->streams;
|
|
for (i = 0; i < 2; ++i) {
|
|
for (iter = list_to_process; iter; iter = g_list_next (iter)) {
|
|
GstAdaptiveDemuxStream *stream = iter->data;
|
|
|
|
stream->download_error_count = 0;
|
|
stream->need_header = TRUE;
|
|
stream->qos_earliest_time = GST_CLOCK_TIME_NONE;
|
|
}
|
|
list_to_process = demux->prepared_streams;
|
|
}
|
|
}
|
|
|
|
/* must be called with manifest_lock taken */
|
|
static gboolean
|
|
gst_adaptive_demux_push_src_event (GstAdaptiveDemux * demux, GstEvent * event)
|
|
{
|
|
GList *iter;
|
|
gboolean ret = TRUE;
|
|
|
|
for (iter = demux->streams; iter; iter = g_list_next (iter)) {
|
|
GstAdaptiveDemuxStream *stream = iter->data;
|
|
gst_event_ref (event);
|
|
ret = ret & gst_pad_push_event (stream->pad, event);
|
|
}
|
|
gst_event_unref (event);
|
|
return ret;
|
|
}
|
|
|
|
/* must be called with manifest_lock taken */
|
|
void
|
|
gst_adaptive_demux_stream_set_caps (GstAdaptiveDemuxStream * stream,
|
|
GstCaps * caps)
|
|
{
|
|
GST_DEBUG_OBJECT (stream->pad, "setting new caps for stream %" GST_PTR_FORMAT,
|
|
caps);
|
|
gst_caps_replace (&stream->pending_caps, caps);
|
|
gst_caps_unref (caps);
|
|
}
|
|
|
|
/* must be called with manifest_lock taken */
|
|
void
|
|
gst_adaptive_demux_stream_set_tags (GstAdaptiveDemuxStream * stream,
|
|
GstTagList * tags)
|
|
{
|
|
GST_DEBUG_OBJECT (stream->pad, "setting new tags for stream %" GST_PTR_FORMAT,
|
|
tags);
|
|
if (stream->pending_tags) {
|
|
gst_tag_list_unref (stream->pending_tags);
|
|
}
|
|
stream->pending_tags = tags;
|
|
}
|
|
|
|
/* must be called with manifest_lock taken */
|
|
void
|
|
gst_adaptive_demux_stream_queue_event (GstAdaptiveDemuxStream * stream,
|
|
GstEvent * event)
|
|
{
|
|
stream->pending_events = g_list_append (stream->pending_events, event);
|
|
}
|
|
|
|
/* must be called with manifest_lock taken */
|
|
static guint64
|
|
_update_average_bitrate (GstAdaptiveDemux * demux,
|
|
GstAdaptiveDemuxStream * stream, guint64 new_bitrate)
|
|
{
|
|
gint index = stream->moving_index % NUM_LOOKBACK_FRAGMENTS;
|
|
|
|
stream->moving_bitrate -= stream->fragment_bitrates[index];
|
|
stream->fragment_bitrates[index] = new_bitrate;
|
|
stream->moving_bitrate += new_bitrate;
|
|
|
|
stream->moving_index += 1;
|
|
|
|
if (stream->moving_index > NUM_LOOKBACK_FRAGMENTS)
|
|
return stream->moving_bitrate / NUM_LOOKBACK_FRAGMENTS;
|
|
return stream->moving_bitrate / stream->moving_index;
|
|
}
|
|
|
|
/* must be called with manifest_lock taken */
|
|
static guint64
|
|
gst_adaptive_demux_stream_update_current_bitrate (GstAdaptiveDemux * demux,
|
|
GstAdaptiveDemuxStream * stream)
|
|
{
|
|
guint64 average_bitrate;
|
|
guint64 fragment_bitrate;
|
|
|
|
if (demux->connection_speed) {
|
|
GST_LOG_OBJECT (demux, "Connection-speed is set to %u kbps, using it",
|
|
demux->connection_speed / 1000);
|
|
stream->current_download_rate = demux->connection_speed;
|
|
return demux->connection_speed;
|
|
}
|
|
|
|
fragment_bitrate = stream->last_bitrate;
|
|
GST_DEBUG_OBJECT (demux, "Download bitrate is : %" G_GUINT64_FORMAT " bps",
|
|
fragment_bitrate);
|
|
|
|
average_bitrate = _update_average_bitrate (demux, stream, fragment_bitrate);
|
|
|
|
GST_INFO_OBJECT (stream, "last fragment bitrate was %" G_GUINT64_FORMAT,
|
|
fragment_bitrate);
|
|
GST_INFO_OBJECT (stream,
|
|
"Last %u fragments average bitrate is %" G_GUINT64_FORMAT,
|
|
NUM_LOOKBACK_FRAGMENTS, average_bitrate);
|
|
|
|
/* Conservative approach, make sure we don't upgrade too fast */
|
|
stream->current_download_rate = MIN (average_bitrate, fragment_bitrate);
|
|
|
|
stream->current_download_rate *= demux->bitrate_limit;
|
|
GST_DEBUG_OBJECT (demux, "Bitrate after bitrate limit (%0.2f): %"
|
|
G_GUINT64_FORMAT, demux->bitrate_limit, stream->current_download_rate);
|
|
|
|
#if 0
|
|
/* Debugging code, modulate the bitrate every few fragments */
|
|
{
|
|
static guint ctr = 0;
|
|
if (ctr % 3 == 0) {
|
|
GST_INFO_OBJECT (demux, "Halving reported bitrate for debugging");
|
|
stream->current_download_rate /= 2;
|
|
}
|
|
ctr++;
|
|
}
|
|
#endif
|
|
|
|
return stream->current_download_rate;
|
|
}
|
|
|
|
/* must be called with manifest_lock taken */
|
|
static GstFlowReturn
|
|
gst_adaptive_demux_combine_flows (GstAdaptiveDemux * demux)
|
|
{
|
|
gboolean all_notlinked = TRUE;
|
|
gboolean all_eos = TRUE;
|
|
GList *iter;
|
|
|
|
for (iter = demux->streams; iter; iter = g_list_next (iter)) {
|
|
GstAdaptiveDemuxStream *stream = iter->data;
|
|
|
|
if (stream->last_ret != GST_FLOW_NOT_LINKED) {
|
|
all_notlinked = FALSE;
|
|
if (stream->last_ret != GST_FLOW_EOS)
|
|
all_eos = FALSE;
|
|
}
|
|
|
|
if (stream->last_ret <= GST_FLOW_NOT_NEGOTIATED
|
|
|| stream->last_ret == GST_FLOW_FLUSHING) {
|
|
return stream->last_ret;
|
|
}
|
|
}
|
|
if (all_notlinked)
|
|
return GST_FLOW_NOT_LINKED;
|
|
else if (all_eos)
|
|
return GST_FLOW_EOS;
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
/* Called with preroll_lock */
|
|
static void
|
|
gst_adaptive_demux_handle_preroll (GstAdaptiveDemux * demux,
|
|
GstAdaptiveDemuxStream * stream)
|
|
{
|
|
demux->priv->preroll_pending--;
|
|
if (demux->priv->preroll_pending == 0) {
|
|
/* That was the last one, time to release all streams
|
|
* and expose them */
|
|
GST_DEBUG_OBJECT (demux, "All streams prerolled. exposing");
|
|
gst_adaptive_demux_expose_streams (demux);
|
|
g_cond_broadcast (&demux->priv->preroll_cond);
|
|
}
|
|
}
|
|
|
|
/* must be called with manifest_lock taken.
|
|
* Temporarily releases manifest_lock
|
|
*/
|
|
GstFlowReturn
|
|
gst_adaptive_demux_stream_push_buffer (GstAdaptiveDemuxStream * stream,
|
|
GstBuffer * buffer)
|
|
{
|
|
GstAdaptiveDemux *demux = stream->demux;
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
gboolean discont = FALSE;
|
|
/* Pending events */
|
|
GstEvent *pending_caps = NULL, *pending_segment = NULL, *pending_tags = NULL;
|
|
GList *pending_events = NULL;
|
|
|
|
/* FIXME :
|
|
* This is duplicating *exactly* the same thing as what is done at the beginning
|
|
* of _src_chain if starting_fragment is TRUE */
|
|
if (stream->first_fragment_buffer) {
|
|
GstClockTime offset =
|
|
gst_adaptive_demux_stream_get_presentation_offset (demux, stream);
|
|
GstClockTime period_start =
|
|
gst_adaptive_demux_get_period_start_time (demux);
|
|
|
|
GST_ADAPTIVE_DEMUX_SEGMENT_LOCK (demux);
|
|
if (demux->segment.rate < 0)
|
|
/* Set DISCONT flag for every first buffer in reverse playback mode
|
|
* as each fragment for its own has to be reversed */
|
|
discont = TRUE;
|
|
|
|
GST_BUFFER_PTS (buffer) = stream->fragment.timestamp;
|
|
if (GST_BUFFER_PTS_IS_VALID (buffer))
|
|
GST_BUFFER_PTS (buffer) += offset;
|
|
|
|
if (GST_BUFFER_PTS_IS_VALID (buffer)) {
|
|
stream->segment.position = GST_BUFFER_PTS (buffer);
|
|
|
|
/* Convert from position inside the stream's segment to the demuxer's
|
|
* segment, they are not necessarily the same */
|
|
if (stream->segment.position - offset + period_start >
|
|
demux->segment.position)
|
|
demux->segment.position =
|
|
stream->segment.position - offset + period_start;
|
|
}
|
|
GST_ADAPTIVE_DEMUX_SEGMENT_UNLOCK (demux);
|
|
|
|
GST_LOG_OBJECT (stream->pad,
|
|
"Going to push buffer with PTS %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (GST_BUFFER_PTS (buffer)));
|
|
} else {
|
|
GST_BUFFER_PTS (buffer) = GST_CLOCK_TIME_NONE;
|
|
}
|
|
|
|
if (stream->discont) {
|
|
discont = TRUE;
|
|
stream->discont = FALSE;
|
|
}
|
|
|
|
if (discont) {
|
|
GST_DEBUG_OBJECT (stream->pad, "Marking fragment as discontinuous");
|
|
GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT);
|
|
} else {
|
|
GST_BUFFER_FLAG_UNSET (buffer, GST_BUFFER_FLAG_DISCONT);
|
|
}
|
|
|
|
stream->first_fragment_buffer = FALSE;
|
|
|
|
GST_BUFFER_DURATION (buffer) = GST_CLOCK_TIME_NONE;
|
|
GST_BUFFER_DTS (buffer) = GST_CLOCK_TIME_NONE;
|
|
if (G_UNLIKELY (stream->pending_caps)) {
|
|
pending_caps = gst_event_new_caps (stream->pending_caps);
|
|
gst_caps_unref (stream->pending_caps);
|
|
stream->pending_caps = NULL;
|
|
}
|
|
|
|
if (stream->do_block) {
|
|
|
|
g_mutex_lock (&demux->priv->preroll_lock);
|
|
|
|
/* If we are preroll state, set caps in here */
|
|
if (pending_caps) {
|
|
gst_pad_push_event (stream->pad, pending_caps);
|
|
pending_caps = NULL;
|
|
}
|
|
|
|
gst_adaptive_demux_handle_preroll (demux, stream);
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
|
|
while (stream->do_block && !stream->cancelled) {
|
|
GST_LOG_OBJECT (demux, "Stream %p sleeping for preroll", stream);
|
|
g_cond_wait (&demux->priv->preroll_cond, &demux->priv->preroll_lock);
|
|
}
|
|
if (stream->cancelled) {
|
|
GST_LOG_OBJECT (demux, "stream %p cancelled", stream);
|
|
gst_buffer_unref (buffer);
|
|
g_mutex_unlock (&demux->priv->preroll_lock);
|
|
return GST_FLOW_FLUSHING;
|
|
}
|
|
|
|
g_mutex_unlock (&demux->priv->preroll_lock);
|
|
GST_MANIFEST_LOCK (demux);
|
|
}
|
|
|
|
if (G_UNLIKELY (stream->pending_segment)) {
|
|
GST_ADAPTIVE_DEMUX_SEGMENT_LOCK (demux);
|
|
pending_segment = stream->pending_segment;
|
|
stream->pending_segment = NULL;
|
|
GST_ADAPTIVE_DEMUX_SEGMENT_UNLOCK (demux);
|
|
}
|
|
if (G_UNLIKELY (stream->pending_tags || stream->bitrate_changed)) {
|
|
GstTagList *tags = stream->pending_tags;
|
|
|
|
stream->pending_tags = NULL;
|
|
stream->bitrate_changed = 0;
|
|
|
|
if (stream->fragment.bitrate != 0) {
|
|
if (tags)
|
|
tags = gst_tag_list_make_writable (tags);
|
|
else
|
|
tags = gst_tag_list_new_empty ();
|
|
|
|
gst_tag_list_add (tags, GST_TAG_MERGE_KEEP,
|
|
GST_TAG_NOMINAL_BITRATE, stream->fragment.bitrate, NULL);
|
|
}
|
|
if (tags)
|
|
pending_tags = gst_event_new_tag (tags);
|
|
}
|
|
if (G_UNLIKELY (stream->pending_events)) {
|
|
pending_events = stream->pending_events;
|
|
stream->pending_events = NULL;
|
|
}
|
|
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
|
|
/* Do not push events or buffers holding the manifest lock */
|
|
if (G_UNLIKELY (pending_caps)) {
|
|
GST_DEBUG_OBJECT (stream->pad, "Setting pending caps: %" GST_PTR_FORMAT,
|
|
pending_caps);
|
|
gst_pad_push_event (stream->pad, pending_caps);
|
|
}
|
|
if (G_UNLIKELY (pending_segment)) {
|
|
GST_DEBUG_OBJECT (stream->pad, "Sending pending seg: %" GST_PTR_FORMAT,
|
|
pending_segment);
|
|
gst_pad_push_event (stream->pad, pending_segment);
|
|
}
|
|
if (G_UNLIKELY (pending_tags)) {
|
|
GST_DEBUG_OBJECT (stream->pad, "Sending pending tags: %" GST_PTR_FORMAT,
|
|
pending_tags);
|
|
gst_pad_push_event (stream->pad, pending_tags);
|
|
}
|
|
while (pending_events != NULL) {
|
|
GstEvent *event = pending_events->data;
|
|
|
|
if (!gst_pad_push_event (stream->pad, event))
|
|
GST_ERROR_OBJECT (stream->pad, "Failed to send pending event");
|
|
|
|
pending_events = g_list_delete_link (pending_events, pending_events);
|
|
}
|
|
|
|
/* Wait for preroll if blocking */
|
|
GST_DEBUG_OBJECT (stream->pad,
|
|
"About to push buffer of size %" G_GSIZE_FORMAT,
|
|
gst_buffer_get_size (buffer));
|
|
|
|
ret = gst_pad_push (stream->pad, buffer);
|
|
|
|
GST_MANIFEST_LOCK (demux);
|
|
|
|
g_mutex_lock (&stream->fragment_download_lock);
|
|
if (G_UNLIKELY (stream->cancelled)) {
|
|
GST_LOG_OBJECT (stream, "Stream was cancelled");
|
|
ret = stream->last_ret = GST_FLOW_FLUSHING;
|
|
g_mutex_unlock (&stream->fragment_download_lock);
|
|
return ret;
|
|
}
|
|
g_mutex_unlock (&stream->fragment_download_lock);
|
|
|
|
GST_LOG_OBJECT (stream->pad, "Push result: %d %s", ret,
|
|
gst_flow_get_name (ret));
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* must be called with manifest_lock taken */
|
|
static GstFlowReturn
|
|
gst_adaptive_demux_stream_finish_fragment_default (GstAdaptiveDemux * demux,
|
|
GstAdaptiveDemuxStream * stream)
|
|
{
|
|
/* No need to advance, this isn't a real fragment */
|
|
if (G_UNLIKELY (stream->downloading_header || stream->downloading_index))
|
|
return GST_FLOW_OK;
|
|
|
|
return gst_adaptive_demux_stream_advance_fragment (demux, stream,
|
|
stream->fragment.duration);
|
|
}
|
|
|
|
/* must be called with manifest_lock taken.
|
|
* Can temporarily release manifest_lock
|
|
*/
|
|
static GstFlowReturn
|
|
gst_adaptive_demux_stream_data_received_default (GstAdaptiveDemux * demux,
|
|
GstAdaptiveDemuxStream * stream, GstBuffer * buffer)
|
|
{
|
|
return gst_adaptive_demux_stream_push_buffer (stream, buffer);
|
|
}
|
|
|
|
static gboolean
|
|
gst_adaptive_demux_requires_periodical_playlist_update_default (GstAdaptiveDemux
|
|
* demux)
|
|
{
|
|
return TRUE;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
_src_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
|
|
{
|
|
GstAdaptiveDemuxStream *stream;
|
|
GstAdaptiveDemux *demux;
|
|
GstAdaptiveDemuxClass *klass;
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
|
|
demux = GST_ADAPTIVE_DEMUX_CAST (parent);
|
|
stream = gst_pad_get_element_private (pad);
|
|
klass = GST_ADAPTIVE_DEMUX_GET_CLASS (demux);
|
|
|
|
GST_MANIFEST_LOCK (demux);
|
|
|
|
/* do not make any changes if the stream is cancelled */
|
|
g_mutex_lock (&stream->fragment_download_lock);
|
|
if (G_UNLIKELY (stream->cancelled)) {
|
|
g_mutex_unlock (&stream->fragment_download_lock);
|
|
gst_buffer_unref (buffer);
|
|
ret = stream->last_ret = GST_FLOW_FLUSHING;
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
return ret;
|
|
}
|
|
g_mutex_unlock (&stream->fragment_download_lock);
|
|
|
|
/* starting_fragment is set to TRUE at the beginning of
|
|
* _stream_download_fragment()
|
|
* /!\ If there is a header/index being downloaded, then this will
|
|
* be TRUE for the first one ... but FALSE for the remaining ones,
|
|
* including the *actual* fragment ! */
|
|
if (stream->starting_fragment) {
|
|
GstClockTime offset =
|
|
gst_adaptive_demux_stream_get_presentation_offset (demux, stream);
|
|
GstClockTime period_start =
|
|
gst_adaptive_demux_get_period_start_time (demux);
|
|
|
|
stream->starting_fragment = FALSE;
|
|
if (klass->start_fragment) {
|
|
if (!klass->start_fragment (demux, stream)) {
|
|
ret = GST_FLOW_ERROR;
|
|
goto error;
|
|
}
|
|
}
|
|
|
|
GST_BUFFER_PTS (buffer) = stream->fragment.timestamp;
|
|
if (GST_BUFFER_PTS_IS_VALID (buffer))
|
|
GST_BUFFER_PTS (buffer) += offset;
|
|
|
|
GST_LOG_OBJECT (stream->pad, "set fragment pts=%" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (GST_BUFFER_PTS (buffer)));
|
|
|
|
if (GST_BUFFER_PTS_IS_VALID (buffer)) {
|
|
GST_ADAPTIVE_DEMUX_SEGMENT_LOCK (demux);
|
|
stream->segment.position = GST_BUFFER_PTS (buffer);
|
|
|
|
/* Convert from position inside the stream's segment to the demuxer's
|
|
* segment, they are not necessarily the same */
|
|
if (stream->segment.position - offset + period_start >
|
|
demux->segment.position)
|
|
demux->segment.position =
|
|
stream->segment.position - offset + period_start;
|
|
GST_ADAPTIVE_DEMUX_SEGMENT_UNLOCK (demux);
|
|
}
|
|
|
|
} else {
|
|
GST_BUFFER_PTS (buffer) = GST_CLOCK_TIME_NONE;
|
|
}
|
|
|
|
/* downloading_first_buffer is set to TRUE in download_uri() just before
|
|
* activating the source (i.e. requesting a given URI)
|
|
*
|
|
* The difference with starting_fragment is that this will be called
|
|
* for *all* first buffers (of index, and header, and fragment)
|
|
*
|
|
* ... to then only do something useful (in this block) for actual
|
|
* fragments... */
|
|
if (stream->downloading_first_buffer) {
|
|
gint64 chunk_size = 0;
|
|
|
|
stream->downloading_first_buffer = FALSE;
|
|
|
|
if (!stream->downloading_header && !stream->downloading_index) {
|
|
/* If this is the first buffer of a fragment (not the headers or index)
|
|
* and we don't have a birate from the sub-class, then see if we
|
|
* can work it out from the fragment size and duration */
|
|
if (stream->fragment.bitrate == 0 &&
|
|
stream->fragment.duration != 0 &&
|
|
gst_element_query_duration (stream->uri_handler, GST_FORMAT_BYTES,
|
|
&chunk_size)) {
|
|
guint bitrate = MIN (G_MAXUINT, gst_util_uint64_scale (chunk_size,
|
|
8 * GST_SECOND, stream->fragment.duration));
|
|
GST_LOG_OBJECT (demux,
|
|
"Fragment has size %" G_GUINT64_FORMAT " duration %" GST_TIME_FORMAT
|
|
" = bitrate %u", chunk_size,
|
|
GST_TIME_ARGS (stream->fragment.duration), bitrate);
|
|
stream->fragment.bitrate = bitrate;
|
|
}
|
|
if (stream->fragment.bitrate) {
|
|
stream->bitrate_changed = TRUE;
|
|
} else {
|
|
GST_WARNING_OBJECT (demux, "Bitrate for fragment not available");
|
|
}
|
|
}
|
|
}
|
|
|
|
stream->download_total_bytes += gst_buffer_get_size (buffer);
|
|
|
|
GST_TRACE_OBJECT (stream->pad, "Received buffer of size %" G_GSIZE_FORMAT,
|
|
gst_buffer_get_size (buffer));
|
|
|
|
ret = klass->data_received (demux, stream, buffer);
|
|
|
|
if (ret == GST_FLOW_FLUSHING) {
|
|
/* do not make any changes if the stream is cancelled */
|
|
g_mutex_lock (&stream->fragment_download_lock);
|
|
if (G_UNLIKELY (stream->cancelled)) {
|
|
g_mutex_unlock (&stream->fragment_download_lock);
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
return ret;
|
|
}
|
|
g_mutex_unlock (&stream->fragment_download_lock);
|
|
}
|
|
|
|
if (ret != GST_FLOW_OK) {
|
|
gboolean finished = FALSE;
|
|
|
|
if (ret < GST_FLOW_EOS) {
|
|
GST_ELEMENT_FLOW_ERROR (demux, ret);
|
|
|
|
/* TODO push this on all pads */
|
|
gst_pad_push_event (stream->pad, gst_event_new_eos ());
|
|
} else {
|
|
GST_DEBUG_OBJECT (stream->pad, "stream stopped, reason %s",
|
|
gst_flow_get_name (ret));
|
|
}
|
|
|
|
if (ret == (GstFlowReturn) GST_ADAPTIVE_DEMUX_FLOW_SWITCH) {
|
|
ret = GST_FLOW_EOS; /* return EOS to make the source stop */
|
|
} else if (ret == GST_ADAPTIVE_DEMUX_FLOW_END_OF_FRAGMENT) {
|
|
/* Behaves like an EOS event from upstream */
|
|
stream->fragment.finished = TRUE;
|
|
ret = klass->finish_fragment (demux, stream);
|
|
if (ret == (GstFlowReturn) GST_ADAPTIVE_DEMUX_FLOW_SWITCH) {
|
|
ret = GST_FLOW_EOS; /* return EOS to make the source stop */
|
|
} else if (ret != GST_FLOW_OK) {
|
|
goto error;
|
|
}
|
|
finished = TRUE;
|
|
}
|
|
|
|
gst_adaptive_demux_stream_fragment_download_finish (stream, ret, NULL);
|
|
if (finished)
|
|
ret = GST_FLOW_EOS;
|
|
}
|
|
|
|
error:
|
|
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* must be called with manifest_lock taken */
|
|
static void
|
|
gst_adaptive_demux_stream_fragment_download_finish (GstAdaptiveDemuxStream *
|
|
stream, GstFlowReturn ret, GError * err)
|
|
{
|
|
GST_DEBUG_OBJECT (stream->pad, "Download finish: %d %s - err: %p", ret,
|
|
gst_flow_get_name (ret), err);
|
|
|
|
/* if we have an error, only replace last_ret if it was OK before to avoid
|
|
* overwriting the first error we got */
|
|
if (stream->last_ret == GST_FLOW_OK) {
|
|
stream->last_ret = ret;
|
|
if (err) {
|
|
g_clear_error (&stream->last_error);
|
|
stream->last_error = g_error_copy (err);
|
|
}
|
|
}
|
|
g_mutex_lock (&stream->fragment_download_lock);
|
|
stream->download_finished = TRUE;
|
|
g_cond_signal (&stream->fragment_download_cond);
|
|
g_mutex_unlock (&stream->fragment_download_lock);
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_adaptive_demux_eos_handling (GstAdaptiveDemuxStream * stream)
|
|
{
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
GstAdaptiveDemuxClass *klass = GST_ADAPTIVE_DEMUX_GET_CLASS (stream->demux);
|
|
|
|
if (!klass->need_another_chunk || stream->fragment.chunk_size == -1
|
|
|| !klass->need_another_chunk (stream)
|
|
|| stream->fragment.chunk_size == 0) {
|
|
stream->fragment.finished = TRUE;
|
|
ret = klass->finish_fragment (stream->demux, stream);
|
|
}
|
|
gst_adaptive_demux_stream_fragment_download_finish (stream, ret, NULL);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
|
|
{
|
|
GstAdaptiveDemuxStream *stream = gst_pad_get_element_private (pad);
|
|
GstAdaptiveDemux *demux = stream->demux;
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_EOS:{
|
|
GST_DEBUG_OBJECT (pad, "Saw EOS on src pad");
|
|
GST_MANIFEST_LOCK (demux);
|
|
|
|
gst_adaptive_demux_eos_handling (stream);
|
|
|
|
/* FIXME ?
|
|
* _eos_handling() calls fragment_download_finish() which does the
|
|
* same thing as below.
|
|
* Could this cause races ? */
|
|
g_mutex_lock (&stream->fragment_download_lock);
|
|
stream->download_finished = TRUE;
|
|
g_cond_signal (&stream->fragment_download_cond);
|
|
g_mutex_unlock (&stream->fragment_download_lock);
|
|
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
|
|
gst_event_unref (event);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
|
|
{
|
|
GstAdaptiveDemuxStream *stream = gst_pad_get_element_private (pad);
|
|
|
|
switch (GST_QUERY_TYPE (query)) {
|
|
case GST_QUERY_ALLOCATION:
|
|
return FALSE;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return gst_pad_peer_query (stream->pad, query);
|
|
}
|
|
|
|
static GstPadProbeReturn
|
|
_uri_handler_probe (GstPad * pad, GstPadProbeInfo * info,
|
|
GstAdaptiveDemuxStream * stream)
|
|
{
|
|
GstPadProbeReturn ret = GST_PAD_PROBE_OK;
|
|
|
|
if (GST_PAD_PROBE_INFO_TYPE (info) & GST_PAD_PROBE_TYPE_BUFFER) {
|
|
GstBuffer *buf = GST_PAD_PROBE_INFO_BUFFER (info);
|
|
if (stream->fragment_bytes_downloaded == 0) {
|
|
stream->last_latency =
|
|
gst_adaptive_demux_get_monotonic_time (stream->demux) -
|
|
(stream->download_start_time * GST_USECOND);
|
|
GST_DEBUG_OBJECT (pad,
|
|
"FIRST BYTE since download_start %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (stream->last_latency));
|
|
}
|
|
stream->fragment_bytes_downloaded += gst_buffer_get_size (buf);
|
|
GST_LOG_OBJECT (pad,
|
|
"Received buffer, size %" G_GSIZE_FORMAT " total %" G_GUINT64_FORMAT,
|
|
gst_buffer_get_size (buf), stream->fragment_bytes_downloaded);
|
|
} else if (GST_PAD_PROBE_INFO_TYPE (info) &
|
|
GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM) {
|
|
GstEvent *ev = GST_PAD_PROBE_INFO_EVENT (info);
|
|
GST_LOG_OBJECT (pad, "Received event %s %" GST_PTR_FORMAT,
|
|
GST_EVENT_TYPE_NAME (ev), ev);
|
|
switch (GST_EVENT_TYPE (ev)) {
|
|
case GST_EVENT_SEGMENT:
|
|
stream->fragment_bytes_downloaded = 0;
|
|
break;
|
|
case GST_EVENT_EOS:
|
|
{
|
|
stream->last_download_time =
|
|
gst_adaptive_demux_get_monotonic_time (stream->demux) -
|
|
(stream->download_start_time * GST_USECOND);
|
|
stream->last_bitrate =
|
|
gst_util_uint64_scale (stream->fragment_bytes_downloaded,
|
|
8 * GST_SECOND, stream->last_download_time);
|
|
GST_DEBUG_OBJECT (pad,
|
|
"EOS since download_start %" GST_TIME_FORMAT " bitrate %"
|
|
G_GUINT64_FORMAT " bps", GST_TIME_ARGS (stream->last_download_time),
|
|
stream->last_bitrate);
|
|
/* Calculate bitrate since URI request */
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* must be called with manifest_lock taken.
|
|
* Can temporarily release manifest_lock
|
|
*/
|
|
static gboolean
|
|
gst_adaptive_demux_stream_wait_manifest_update (GstAdaptiveDemux * demux,
|
|
GstAdaptiveDemuxStream * stream)
|
|
{
|
|
gboolean ret = TRUE;
|
|
|
|
/* Wait until we're cancelled or there's something for
|
|
* us to download in the playlist or the playlist
|
|
* became non-live */
|
|
while (TRUE) {
|
|
GST_DEBUG_OBJECT (demux, "No fragment left but live playlist, wait a bit");
|
|
|
|
/* get the manifest_update_lock while still holding the manifest_lock.
|
|
* This will prevent other threads to signal the condition (they will need
|
|
* both manifest_lock and manifest_update_lock in order to signal).
|
|
* It cannot deadlock because all threads always get the manifest_lock first
|
|
* and manifest_update_lock second.
|
|
*/
|
|
g_mutex_lock (&demux->priv->manifest_update_lock);
|
|
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
|
|
g_cond_wait (&demux->priv->manifest_cond,
|
|
&demux->priv->manifest_update_lock);
|
|
g_mutex_unlock (&demux->priv->manifest_update_lock);
|
|
|
|
GST_MANIFEST_LOCK (demux);
|
|
|
|
/* check for cancelled every time we get the manifest_lock */
|
|
g_mutex_lock (&stream->fragment_download_lock);
|
|
if (G_UNLIKELY (stream->cancelled)) {
|
|
ret = FALSE;
|
|
stream->last_ret = GST_FLOW_FLUSHING;
|
|
g_mutex_unlock (&stream->fragment_download_lock);
|
|
break;
|
|
}
|
|
g_mutex_unlock (&stream->fragment_download_lock);
|
|
|
|
/* Got a new fragment or not live anymore? */
|
|
if (gst_adaptive_demux_stream_update_fragment_info (demux, stream) ==
|
|
GST_FLOW_OK) {
|
|
GST_DEBUG_OBJECT (demux, "new fragment available, "
|
|
"not waiting for manifest update");
|
|
ret = TRUE;
|
|
break;
|
|
}
|
|
|
|
if (!gst_adaptive_demux_is_live (demux)) {
|
|
GST_DEBUG_OBJECT (demux, "Not live anymore, "
|
|
"not waiting for manifest update");
|
|
ret = FALSE;
|
|
break;
|
|
}
|
|
}
|
|
GST_DEBUG_OBJECT (demux, "Retrying now");
|
|
return ret;
|
|
}
|
|
|
|
/* must be called with manifest_lock taken */
|
|
static gboolean
|
|
gst_adaptive_demux_stream_update_source (GstAdaptiveDemuxStream * stream,
|
|
const gchar * uri, const gchar * referer, gboolean refresh,
|
|
gboolean allow_cache)
|
|
{
|
|
GstAdaptiveDemux *demux = stream->demux;
|
|
|
|
if (!gst_uri_is_valid (uri)) {
|
|
GST_WARNING_OBJECT (stream->pad, "Invalid URI: %s", uri);
|
|
return FALSE;
|
|
}
|
|
|
|
/* Try to re-use existing source element */
|
|
if (stream->src != NULL) {
|
|
gchar *old_protocol, *new_protocol;
|
|
gchar *old_uri;
|
|
|
|
old_uri = gst_uri_handler_get_uri (GST_URI_HANDLER (stream->uri_handler));
|
|
old_protocol = gst_uri_get_protocol (old_uri);
|
|
new_protocol = gst_uri_get_protocol (uri);
|
|
|
|
if (!g_str_equal (old_protocol, new_protocol)) {
|
|
GstElement *src = stream->src;
|
|
|
|
stream->src = NULL;
|
|
gst_object_unref (stream->src_srcpad);
|
|
stream->src_srcpad = NULL;
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
gst_element_set_locked_state (src, TRUE);
|
|
gst_element_set_state (src, GST_STATE_NULL);
|
|
gst_bin_remove (GST_BIN_CAST (demux), src);
|
|
GST_MANIFEST_LOCK (demux);
|
|
GST_DEBUG_OBJECT (demux, "Can't re-use old source element");
|
|
} else {
|
|
GError *err = NULL;
|
|
|
|
GST_DEBUG_OBJECT (demux, "Re-using old source element");
|
|
if (!gst_uri_handler_set_uri (GST_URI_HANDLER (stream->uri_handler), uri,
|
|
&err)) {
|
|
GstElement *src = stream->src;
|
|
|
|
stream->src = NULL;
|
|
GST_DEBUG_OBJECT (demux, "Failed to re-use old source element: %s",
|
|
err ? err->message : "Unknown error");
|
|
g_clear_error (&err);
|
|
gst_object_unref (stream->src_srcpad);
|
|
stream->src_srcpad = NULL;
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
gst_element_set_locked_state (src, TRUE);
|
|
gst_element_set_state (src, GST_STATE_NULL);
|
|
gst_bin_remove (GST_BIN_CAST (demux), src);
|
|
GST_MANIFEST_LOCK (demux);
|
|
}
|
|
}
|
|
g_free (old_uri);
|
|
g_free (old_protocol);
|
|
g_free (new_protocol);
|
|
}
|
|
|
|
if (stream->src == NULL) {
|
|
GstPad *uri_handler_src;
|
|
GstPad *queue_sink;
|
|
GstPad *queue_src;
|
|
GstElement *uri_handler;
|
|
GstElement *queue;
|
|
GstPadLinkReturn pad_link_ret;
|
|
GObjectClass *gobject_class;
|
|
gchar *internal_name, *bin_name;
|
|
|
|
/* Our src consists of a bin containing uri_handler -> queue . The
|
|
* purpose of the queue is to allow the uri_handler to download an
|
|
* entire fragment without blocking, so we can accurately measure the
|
|
* download bitrate. */
|
|
|
|
queue = gst_element_factory_make ("queue", NULL);
|
|
if (queue == NULL)
|
|
return FALSE;
|
|
|
|
g_object_set (queue, "max-size-bytes", (guint) SRC_QUEUE_MAX_BYTES, NULL);
|
|
g_object_set (queue, "max-size-buffers", (guint) 0, NULL);
|
|
g_object_set (queue, "max-size-time", (guint64) 0, NULL);
|
|
|
|
uri_handler = gst_element_make_from_uri (GST_URI_SRC, uri, NULL, NULL);
|
|
if (uri_handler == NULL) {
|
|
GST_ELEMENT_ERROR (demux, CORE, MISSING_PLUGIN,
|
|
("Missing plugin to handle URI: '%s'", uri), (NULL));
|
|
gst_object_unref (queue);
|
|
return FALSE;
|
|
}
|
|
|
|
gobject_class = G_OBJECT_GET_CLASS (uri_handler);
|
|
|
|
if (g_object_class_find_property (gobject_class, "compress"))
|
|
g_object_set (uri_handler, "compress", FALSE, NULL);
|
|
if (g_object_class_find_property (gobject_class, "keep-alive"))
|
|
g_object_set (uri_handler, "keep-alive", TRUE, NULL);
|
|
if (g_object_class_find_property (gobject_class, "extra-headers")) {
|
|
if (referer || refresh || !allow_cache) {
|
|
GstStructure *extra_headers = gst_structure_new_empty ("headers");
|
|
|
|
if (referer)
|
|
gst_structure_set (extra_headers, "Referer", G_TYPE_STRING, referer,
|
|
NULL);
|
|
|
|
if (!allow_cache)
|
|
gst_structure_set (extra_headers, "Cache-Control", G_TYPE_STRING,
|
|
"no-cache", NULL);
|
|
else if (refresh)
|
|
gst_structure_set (extra_headers, "Cache-Control", G_TYPE_STRING,
|
|
"max-age=0", NULL);
|
|
|
|
g_object_set (uri_handler, "extra-headers", extra_headers, NULL);
|
|
|
|
gst_structure_free (extra_headers);
|
|
} else {
|
|
g_object_set (uri_handler, "extra-headers", NULL, NULL);
|
|
}
|
|
}
|
|
|
|
/* Source bin creation */
|
|
bin_name = g_strdup_printf ("srcbin-%s", GST_PAD_NAME (stream->pad));
|
|
stream->src = gst_bin_new (bin_name);
|
|
g_free (bin_name);
|
|
if (stream->src == NULL) {
|
|
gst_object_unref (queue);
|
|
gst_object_unref (uri_handler);
|
|
return FALSE;
|
|
}
|
|
|
|
gst_bin_add (GST_BIN_CAST (stream->src), queue);
|
|
gst_bin_add (GST_BIN_CAST (stream->src), uri_handler);
|
|
|
|
uri_handler_src = gst_element_get_static_pad (uri_handler, "src");
|
|
queue_sink = gst_element_get_static_pad (queue, "sink");
|
|
|
|
pad_link_ret =
|
|
gst_pad_link_full (uri_handler_src, queue_sink,
|
|
GST_PAD_LINK_CHECK_NOTHING);
|
|
if (GST_PAD_LINK_FAILED (pad_link_ret)) {
|
|
GST_WARNING_OBJECT (demux,
|
|
"Could not link pads %s:%s to %s:%s for reason %d",
|
|
GST_DEBUG_PAD_NAME (uri_handler_src), GST_DEBUG_PAD_NAME (queue_sink),
|
|
pad_link_ret);
|
|
g_object_unref (queue_sink);
|
|
g_object_unref (uri_handler_src);
|
|
gst_object_unref (stream->src);
|
|
stream->src = NULL;
|
|
return FALSE;
|
|
}
|
|
|
|
/* Add a downstream event and data probe */
|
|
gst_pad_add_probe (uri_handler_src, GST_PAD_PROBE_TYPE_DATA_DOWNSTREAM,
|
|
(GstPadProbeCallback) _uri_handler_probe, stream, NULL);
|
|
|
|
g_object_unref (queue_sink);
|
|
g_object_unref (uri_handler_src);
|
|
queue_src = gst_element_get_static_pad (queue, "src");
|
|
stream->src_srcpad = gst_ghost_pad_new ("src", queue_src);
|
|
g_object_unref (queue_src);
|
|
gst_element_add_pad (stream->src, stream->src_srcpad);
|
|
|
|
gst_element_set_locked_state (stream->src, TRUE);
|
|
gst_bin_add (GST_BIN_CAST (demux), stream->src);
|
|
stream->src_srcpad = gst_element_get_static_pad (stream->src, "src");
|
|
|
|
/* set up our internal floating pad to drop all events from
|
|
* the http src we don't care about. On the chain function
|
|
* we just push the buffer forward */
|
|
internal_name = g_strdup_printf ("internal-%s", GST_PAD_NAME (stream->pad));
|
|
stream->internal_pad = gst_pad_new (internal_name, GST_PAD_SINK);
|
|
g_free (internal_name);
|
|
gst_object_set_parent (GST_OBJECT_CAST (stream->internal_pad),
|
|
GST_OBJECT_CAST (demux));
|
|
GST_OBJECT_FLAG_SET (stream->internal_pad, GST_PAD_FLAG_NEED_PARENT);
|
|
gst_pad_set_element_private (stream->internal_pad, stream);
|
|
gst_pad_set_active (stream->internal_pad, TRUE);
|
|
gst_pad_set_chain_function (stream->internal_pad, _src_chain);
|
|
gst_pad_set_event_function (stream->internal_pad, _src_event);
|
|
gst_pad_set_query_function (stream->internal_pad, _src_query);
|
|
|
|
if (gst_pad_link_full (stream->src_srcpad, stream->internal_pad,
|
|
GST_PAD_LINK_CHECK_NOTHING) != GST_PAD_LINK_OK) {
|
|
GST_ERROR_OBJECT (stream->pad, "Failed to link internal pad");
|
|
return FALSE;
|
|
}
|
|
|
|
stream->uri_handler = uri_handler;
|
|
stream->queue = queue;
|
|
|
|
stream->last_status_code = 200; /* default to OK */
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
static GstPadProbeReturn
|
|
gst_ad_stream_src_to_ready_cb (GstPad * pad, GstPadProbeInfo * info,
|
|
gpointer user_data)
|
|
{
|
|
GstAdaptiveDemuxStream *stream = user_data;
|
|
|
|
/* The source's src pad is IDLE so now set the state to READY */
|
|
g_mutex_lock (&stream->fragment_download_lock);
|
|
stream->src_at_ready = TRUE;
|
|
g_cond_signal (&stream->fragment_download_cond);
|
|
g_mutex_unlock (&stream->fragment_download_lock);
|
|
|
|
return GST_PAD_PROBE_REMOVE;
|
|
}
|
|
|
|
#ifndef GST_DISABLE_GST_DEBUG
|
|
static const char *
|
|
uritype (GstAdaptiveDemuxStream * s)
|
|
{
|
|
if (s->downloading_header)
|
|
return "header";
|
|
if (s->downloading_index)
|
|
return "index";
|
|
return "fragment";
|
|
}
|
|
#endif
|
|
|
|
/* must be called with manifest_lock taken.
|
|
* Can temporarily release manifest_lock
|
|
*
|
|
* Will return when URI is fully downloaded (or aborted/errored)
|
|
*/
|
|
static GstFlowReturn
|
|
gst_adaptive_demux_stream_download_uri (GstAdaptiveDemux * demux,
|
|
GstAdaptiveDemuxStream * stream, const gchar * uri, gint64 start,
|
|
gint64 end, guint * http_status)
|
|
{
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
GST_DEBUG_OBJECT (stream->pad,
|
|
"Downloading %s uri: %s, range:%" G_GINT64_FORMAT " - %" G_GINT64_FORMAT,
|
|
uritype (stream), uri, start, end);
|
|
|
|
if (http_status)
|
|
*http_status = 200; /* default to ok if no further information */
|
|
|
|
if (!gst_adaptive_demux_stream_update_source (stream, uri, NULL, FALSE, TRUE)) {
|
|
ret = stream->last_ret = GST_FLOW_ERROR;
|
|
return ret;
|
|
}
|
|
|
|
gst_element_set_locked_state (stream->src, TRUE);
|
|
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
if (gst_element_set_state (stream->src,
|
|
GST_STATE_READY) != GST_STATE_CHANGE_FAILURE) {
|
|
/* If ranges are specified, seek to it */
|
|
if (start != 0 || end != -1) {
|
|
/* HTTP ranges are inclusive, GStreamer segments are exclusive for the
|
|
* stop position */
|
|
if (end != -1)
|
|
end += 1;
|
|
/* Send the seek event to the uri_handler, as the other pipeline elements
|
|
* can't handle it when READY. */
|
|
if (!gst_element_send_event (stream->uri_handler, gst_event_new_seek (1.0,
|
|
GST_FORMAT_BYTES, (GstSeekFlags) GST_SEEK_FLAG_FLUSH,
|
|
GST_SEEK_TYPE_SET, start, GST_SEEK_TYPE_SET, end))) {
|
|
|
|
GST_MANIFEST_LOCK (demux);
|
|
/* looks like the source can't handle seeks in READY */
|
|
g_clear_error (&stream->last_error);
|
|
stream->last_error = g_error_new (GST_CORE_ERROR,
|
|
GST_CORE_ERROR_NOT_IMPLEMENTED,
|
|
"Source element can't handle range requests");
|
|
stream->last_ret = GST_FLOW_ERROR;
|
|
} else {
|
|
GST_MANIFEST_LOCK (demux);
|
|
}
|
|
} else {
|
|
GST_MANIFEST_LOCK (demux);
|
|
}
|
|
|
|
if (G_LIKELY (stream->last_ret == GST_FLOW_OK)) {
|
|
stream->download_start_time =
|
|
GST_TIME_AS_USECONDS (gst_adaptive_demux_get_monotonic_time (demux));
|
|
|
|
/* src element is in state READY. Before we start it, we reset
|
|
* download_finished
|
|
*/
|
|
g_mutex_lock (&stream->fragment_download_lock);
|
|
stream->download_finished = FALSE;
|
|
stream->downloading_first_buffer = TRUE;
|
|
g_mutex_unlock (&stream->fragment_download_lock);
|
|
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
|
|
if (!gst_element_sync_state_with_parent (stream->src)) {
|
|
GST_WARNING_OBJECT (demux, "Could not sync state for src element");
|
|
GST_MANIFEST_LOCK (demux);
|
|
ret = stream->last_ret = GST_FLOW_ERROR;
|
|
return ret;
|
|
}
|
|
|
|
/* wait for the fragment to be completely downloaded */
|
|
GST_DEBUG_OBJECT (stream->pad,
|
|
"Waiting for %s download to finish: %s", uritype (stream), uri);
|
|
|
|
g_mutex_lock (&stream->fragment_download_lock);
|
|
stream->src_at_ready = FALSE;
|
|
if (G_UNLIKELY (stream->cancelled)) {
|
|
g_mutex_unlock (&stream->fragment_download_lock);
|
|
GST_MANIFEST_LOCK (demux);
|
|
ret = stream->last_ret = GST_FLOW_FLUSHING;
|
|
return ret;
|
|
}
|
|
/* download_finished is only set:
|
|
* * in ::fragment_download_finish()
|
|
* * if EOS is received on the _src pad
|
|
* */
|
|
while (!stream->cancelled && !stream->download_finished) {
|
|
g_cond_wait (&stream->fragment_download_cond,
|
|
&stream->fragment_download_lock);
|
|
}
|
|
g_mutex_unlock (&stream->fragment_download_lock);
|
|
|
|
GST_DEBUG_OBJECT (stream->pad,
|
|
"Finished Waiting for %s download: %s", uritype (stream), uri);
|
|
|
|
GST_MANIFEST_LOCK (demux);
|
|
g_mutex_lock (&stream->fragment_download_lock);
|
|
if (G_UNLIKELY (stream->cancelled)) {
|
|
ret = stream->last_ret = GST_FLOW_FLUSHING;
|
|
g_mutex_unlock (&stream->fragment_download_lock);
|
|
return ret;
|
|
}
|
|
g_mutex_unlock (&stream->fragment_download_lock);
|
|
|
|
ret = stream->last_ret;
|
|
|
|
GST_DEBUG_OBJECT (stream->pad, "%s download finished: %s %d %s",
|
|
uritype (stream), uri, stream->last_ret,
|
|
gst_flow_get_name (stream->last_ret));
|
|
if (stream->last_ret != GST_FLOW_OK && http_status) {
|
|
*http_status = stream->last_status_code;
|
|
}
|
|
}
|
|
|
|
/* changing src element state might try to join the streaming thread, so
|
|
* we must not hold the manifest lock.
|
|
*/
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
} else {
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
if (stream->last_ret == GST_FLOW_OK)
|
|
stream->last_ret = GST_FLOW_CUSTOM_ERROR;
|
|
ret = GST_FLOW_CUSTOM_ERROR;
|
|
}
|
|
|
|
stream->src_at_ready = FALSE;
|
|
|
|
gst_element_set_locked_state (stream->src, TRUE);
|
|
gst_pad_add_probe (stream->src_srcpad, GST_PAD_PROBE_TYPE_IDLE,
|
|
gst_ad_stream_src_to_ready_cb, stream, NULL);
|
|
|
|
g_mutex_lock (&stream->fragment_download_lock);
|
|
while (!stream->src_at_ready) {
|
|
g_cond_wait (&stream->fragment_download_cond,
|
|
&stream->fragment_download_lock);
|
|
}
|
|
g_mutex_unlock (&stream->fragment_download_lock);
|
|
|
|
gst_element_set_state (stream->src, GST_STATE_READY);
|
|
|
|
/* Need to drop the fragment_download_lock to get the MANIFEST lock */
|
|
GST_MANIFEST_LOCK (demux);
|
|
g_mutex_lock (&stream->fragment_download_lock);
|
|
if (G_UNLIKELY (stream->cancelled)) {
|
|
ret = stream->last_ret = GST_FLOW_FLUSHING;
|
|
g_mutex_unlock (&stream->fragment_download_lock);
|
|
return ret;
|
|
}
|
|
g_mutex_unlock (&stream->fragment_download_lock);
|
|
|
|
/* deactivate and reactivate our ghostpad to make it fresh for a new
|
|
* stream */
|
|
gst_pad_set_active (stream->internal_pad, FALSE);
|
|
gst_pad_set_active (stream->internal_pad, TRUE);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* must be called with manifest_lock taken.
|
|
* Can temporarily release manifest_lock
|
|
*/
|
|
static GstFlowReturn
|
|
gst_adaptive_demux_stream_download_header_fragment (GstAdaptiveDemuxStream *
|
|
stream)
|
|
{
|
|
GstAdaptiveDemux *demux = stream->demux;
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
|
|
if (stream->fragment.header_uri != NULL) {
|
|
GST_DEBUG_OBJECT (demux, "Fetching header %s %" G_GINT64_FORMAT "-%"
|
|
G_GINT64_FORMAT, stream->fragment.header_uri,
|
|
stream->fragment.header_range_start, stream->fragment.header_range_end);
|
|
|
|
stream->downloading_header = TRUE;
|
|
ret = gst_adaptive_demux_stream_download_uri (demux, stream,
|
|
stream->fragment.header_uri, stream->fragment.header_range_start,
|
|
stream->fragment.header_range_end, NULL);
|
|
stream->downloading_header = FALSE;
|
|
}
|
|
|
|
/* check if we have an index */
|
|
if (ret == GST_FLOW_OK) { /* TODO check for other valid types */
|
|
|
|
if (stream->fragment.index_uri != NULL) {
|
|
GST_DEBUG_OBJECT (demux,
|
|
"Fetching index %s %" G_GINT64_FORMAT "-%" G_GINT64_FORMAT,
|
|
stream->fragment.index_uri,
|
|
stream->fragment.index_range_start, stream->fragment.index_range_end);
|
|
stream->downloading_index = TRUE;
|
|
ret = gst_adaptive_demux_stream_download_uri (demux, stream,
|
|
stream->fragment.index_uri, stream->fragment.index_range_start,
|
|
stream->fragment.index_range_end, NULL);
|
|
stream->downloading_index = FALSE;
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* must be called with manifest_lock taken.
|
|
* Can temporarily release manifest_lock
|
|
*/
|
|
static GstFlowReturn
|
|
gst_adaptive_demux_stream_download_fragment (GstAdaptiveDemuxStream * stream)
|
|
{
|
|
GstAdaptiveDemux *demux = stream->demux;
|
|
GstAdaptiveDemuxClass *klass = GST_ADAPTIVE_DEMUX_GET_CLASS (demux);
|
|
gchar *url = NULL;
|
|
GstFlowReturn ret;
|
|
gboolean retried_once = FALSE, live;
|
|
guint http_status;
|
|
guint last_status_code;
|
|
|
|
/* FIXME : */
|
|
/* THERE ARE THREE DIFFERENT VARIABLES FOR THE "BEGINNING" OF A FRAGMENT ! */
|
|
stream->starting_fragment = TRUE;
|
|
stream->last_ret = GST_FLOW_OK;
|
|
stream->first_fragment_buffer = TRUE;
|
|
|
|
GST_DEBUG_OBJECT (stream->pad, "Downloading %s%s%s",
|
|
stream->fragment.uri ? "FRAGMENT " : "",
|
|
stream->fragment.header_uri ? "HEADER " : "",
|
|
stream->fragment.index_uri ? "INDEX" : "");
|
|
|
|
if (stream->fragment.uri == NULL && stream->fragment.header_uri == NULL &&
|
|
stream->fragment.index_uri == NULL)
|
|
goto no_url_error;
|
|
|
|
if (stream->need_header) {
|
|
ret = gst_adaptive_demux_stream_download_header_fragment (stream);
|
|
if (ret != GST_FLOW_OK) {
|
|
return ret;
|
|
}
|
|
stream->need_header = FALSE;
|
|
}
|
|
|
|
again:
|
|
ret = GST_FLOW_OK;
|
|
url = stream->fragment.uri;
|
|
GST_DEBUG_OBJECT (stream->pad, "Got url '%s' for stream %p", url, stream);
|
|
if (!url)
|
|
return ret;
|
|
|
|
stream->last_ret = GST_FLOW_OK;
|
|
http_status = 200;
|
|
|
|
/* Download the actual fragment, either in fragments or in one go */
|
|
if (klass->need_another_chunk && klass->need_another_chunk (stream)
|
|
&& stream->fragment.chunk_size != 0) {
|
|
/* Handle chunk downloading */
|
|
gint64 range_start, range_end, chunk_start, chunk_end;
|
|
guint64 download_total_bytes;
|
|
gint chunk_size = stream->fragment.chunk_size;
|
|
|
|
range_start = chunk_start = stream->fragment.range_start;
|
|
range_end = stream->fragment.range_end;
|
|
/* HTTP ranges are inclusive for the end */
|
|
if (chunk_size != -1)
|
|
chunk_end = range_start + chunk_size - 1;
|
|
else
|
|
chunk_end = range_end;
|
|
|
|
if (range_end != -1)
|
|
chunk_end = MIN (chunk_end, range_end);
|
|
|
|
while (!stream->fragment.finished && (chunk_start <= range_end
|
|
|| range_end == -1)) {
|
|
download_total_bytes = stream->download_total_bytes;
|
|
|
|
ret =
|
|
gst_adaptive_demux_stream_download_uri (demux, stream, url,
|
|
chunk_start, chunk_end, &http_status);
|
|
|
|
GST_DEBUG_OBJECT (stream->pad,
|
|
"Fragment chunk download result: %d (%d) %s", stream->last_ret,
|
|
http_status, gst_flow_get_name (stream->last_ret));
|
|
|
|
/* Don't retry for any chunks except the first. We would have sent
|
|
* data downstream already otherwise and it's difficult to recover
|
|
* from that in a meaningful way */
|
|
if (chunk_start > range_start)
|
|
retried_once = TRUE;
|
|
|
|
/* FIXME: Check for 416 Range Not Satisfiable here and fall back to
|
|
* downloading up to -1. We don't know the full duration.
|
|
* Needs https://bugzilla.gnome.org/show_bug.cgi?id=756806 */
|
|
if (ret != GST_FLOW_OK && chunk_end == -1) {
|
|
break;
|
|
} else if (ret != GST_FLOW_OK) {
|
|
chunk_end = -1;
|
|
stream->last_ret = GST_FLOW_OK;
|
|
continue;
|
|
}
|
|
|
|
if (chunk_end == -1)
|
|
break;
|
|
|
|
/* Short read, we're at the end now */
|
|
if (stream->download_total_bytes - download_total_bytes <
|
|
chunk_end + 1 - chunk_start)
|
|
break;
|
|
|
|
if (!klass->need_another_chunk (stream))
|
|
break;
|
|
|
|
/* HTTP ranges are inclusive for the end */
|
|
chunk_start += chunk_size;
|
|
chunk_size = stream->fragment.chunk_size;
|
|
if (chunk_size != -1)
|
|
chunk_end = chunk_start + chunk_size - 1;
|
|
else
|
|
chunk_end = range_end;
|
|
|
|
if (range_end != -1)
|
|
chunk_end = MIN (chunk_end, range_end);
|
|
}
|
|
} else {
|
|
ret =
|
|
gst_adaptive_demux_stream_download_uri (demux, stream, url,
|
|
stream->fragment.range_start, stream->fragment.range_end, &http_status);
|
|
GST_DEBUG_OBJECT (stream->pad, "Fragment download result: %d (%d) %s",
|
|
stream->last_ret, http_status, gst_flow_get_name (stream->last_ret));
|
|
}
|
|
if (ret == GST_FLOW_OK)
|
|
goto beach;
|
|
|
|
g_mutex_lock (&stream->fragment_download_lock);
|
|
if (G_UNLIKELY (stream->cancelled)) {
|
|
g_mutex_unlock (&stream->fragment_download_lock);
|
|
return ret;
|
|
}
|
|
g_mutex_unlock (&stream->fragment_download_lock);
|
|
|
|
/* TODO check if we are truly stopping */
|
|
if (ret != GST_FLOW_CUSTOM_ERROR)
|
|
goto beach;
|
|
|
|
last_status_code = stream->last_status_code;
|
|
GST_WARNING_OBJECT (stream->pad, "Got custom error, status %u, dc %d",
|
|
last_status_code, stream->download_error_count);
|
|
|
|
live = gst_adaptive_demux_is_live (demux);
|
|
if (!retried_once && ((last_status_code / 100 == 4 && live)
|
|
|| last_status_code / 100 == 5)) {
|
|
/* 4xx/5xx */
|
|
/* if current position is before available start, switch to next */
|
|
if (!gst_adaptive_demux_stream_has_next_fragment (demux, stream))
|
|
goto flushing;
|
|
|
|
if (live) {
|
|
gint64 range_start, range_stop;
|
|
|
|
if (!gst_adaptive_demux_get_live_seek_range (demux, &range_start,
|
|
&range_stop))
|
|
goto flushing;
|
|
|
|
if (demux->segment.position < range_start) {
|
|
GST_DEBUG_OBJECT (stream->pad, "Retrying once with next segment");
|
|
stream->last_ret = GST_FLOW_OK;
|
|
ret = gst_adaptive_demux_eos_handling (stream);
|
|
GST_DEBUG_OBJECT (stream->pad, "finish_fragment: %s",
|
|
gst_flow_get_name (ret));
|
|
GST_DEBUG_OBJECT (demux, "Calling update_fragment_info");
|
|
ret = gst_adaptive_demux_stream_update_fragment_info (demux, stream);
|
|
GST_DEBUG_OBJECT (stream->pad, "finish_fragment: %s",
|
|
gst_flow_get_name (ret));
|
|
if (ret == GST_FLOW_OK) {
|
|
retried_once = TRUE;
|
|
goto again;
|
|
}
|
|
} else if (demux->segment.position > range_stop) {
|
|
/* wait a bit to be in range, we don't have any locks at that point */
|
|
gint64 wait_time =
|
|
gst_adaptive_demux_stream_get_fragment_waiting_time (demux, stream);
|
|
if (wait_time > 0) {
|
|
gint64 end_time = g_get_monotonic_time () + wait_time / GST_USECOND;
|
|
|
|
GST_DEBUG_OBJECT (stream->pad,
|
|
"Download waiting for %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (wait_time));
|
|
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
g_mutex_lock (&stream->fragment_download_lock);
|
|
if (G_UNLIKELY (stream->cancelled)) {
|
|
g_mutex_unlock (&stream->fragment_download_lock);
|
|
GST_MANIFEST_LOCK (demux);
|
|
stream->last_ret = GST_FLOW_FLUSHING;
|
|
goto flushing;
|
|
}
|
|
do {
|
|
g_cond_wait_until (&stream->fragment_download_cond,
|
|
&stream->fragment_download_lock, end_time);
|
|
if (G_UNLIKELY (stream->cancelled)) {
|
|
g_mutex_unlock (&stream->fragment_download_lock);
|
|
GST_MANIFEST_LOCK (demux);
|
|
stream->last_ret = GST_FLOW_FLUSHING;
|
|
goto flushing;
|
|
}
|
|
} while (!stream->download_finished);
|
|
g_mutex_unlock (&stream->fragment_download_lock);
|
|
|
|
GST_MANIFEST_LOCK (demux);
|
|
}
|
|
}
|
|
}
|
|
|
|
flushing:
|
|
if (stream->download_error_count >= MAX_DOWNLOAD_ERROR_COUNT) {
|
|
/* looks like there is no way of knowing when a live stream has ended
|
|
* Have to assume we are falling behind and cause a manifest reload */
|
|
GST_DEBUG_OBJECT (stream->pad, "Converting error of live stream to EOS");
|
|
return GST_FLOW_EOS;
|
|
}
|
|
} else if (!gst_adaptive_demux_stream_has_next_fragment (demux, stream)) {
|
|
/* If this is the last fragment, consider failures EOS and not actual
|
|
* errors. Due to rounding errors in the durations, the last fragment
|
|
* might not actually exist */
|
|
GST_DEBUG_OBJECT (stream->pad, "Converting error for last fragment to EOS");
|
|
return GST_FLOW_EOS;
|
|
} else {
|
|
/* retry once (same segment) for 5xx (server errors) */
|
|
if (!retried_once) {
|
|
retried_once = TRUE;
|
|
/* wait a short time in case the server needs a bit to recover, we don't
|
|
* care if we get woken up before end time. We can use sleep here since
|
|
* we're already blocking and just want to wait some time. */
|
|
g_usleep (100000); /* a tenth of a second */
|
|
goto again;
|
|
}
|
|
}
|
|
|
|
beach:
|
|
return ret;
|
|
|
|
no_url_error:
|
|
{
|
|
GST_ELEMENT_ERROR (demux, STREAM, DEMUX,
|
|
(_("Failed to get fragment URL.")),
|
|
("An error happened when getting fragment URL"));
|
|
gst_task_stop (stream->download_task);
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
}
|
|
|
|
/* this function will take the manifest_lock and will keep it until the end.
|
|
* It will release it temporarily only when going to sleep.
|
|
* Every time it takes the manifest_lock, it will check for cancelled condition
|
|
*/
|
|
static void
|
|
gst_adaptive_demux_stream_download_loop (GstAdaptiveDemuxStream * stream)
|
|
{
|
|
GstAdaptiveDemux *demux = stream->demux;
|
|
GstClockTime next_download = gst_adaptive_demux_get_monotonic_time (demux);
|
|
GstFlowReturn ret;
|
|
gboolean live;
|
|
|
|
GST_LOG_OBJECT (stream->pad, "download loop start");
|
|
|
|
GST_MANIFEST_LOCK (demux);
|
|
|
|
g_mutex_lock (&stream->fragment_download_lock);
|
|
if (G_UNLIKELY (stream->cancelled)) {
|
|
stream->last_ret = GST_FLOW_FLUSHING;
|
|
g_mutex_unlock (&stream->fragment_download_lock);
|
|
goto cancelled;
|
|
}
|
|
g_mutex_unlock (&stream->fragment_download_lock);
|
|
|
|
/* Check if we're done with our segment */
|
|
GST_ADAPTIVE_DEMUX_SEGMENT_LOCK (demux);
|
|
if (demux->segment.rate > 0) {
|
|
if (GST_CLOCK_TIME_IS_VALID (demux->segment.stop)
|
|
&& stream->segment.position >= stream->segment.stop) {
|
|
GST_ADAPTIVE_DEMUX_SEGMENT_UNLOCK (demux);
|
|
ret = GST_FLOW_EOS;
|
|
gst_task_stop (stream->download_task);
|
|
goto end_of_manifest;
|
|
}
|
|
} else {
|
|
if (GST_CLOCK_TIME_IS_VALID (demux->segment.start)
|
|
&& stream->segment.position <= stream->segment.start) {
|
|
GST_ADAPTIVE_DEMUX_SEGMENT_UNLOCK (demux);
|
|
ret = GST_FLOW_EOS;
|
|
gst_task_stop (stream->download_task);
|
|
goto end_of_manifest;
|
|
}
|
|
}
|
|
GST_ADAPTIVE_DEMUX_SEGMENT_UNLOCK (demux);
|
|
|
|
/* Cleanup old streams if any */
|
|
if (G_UNLIKELY (demux->priv->old_streams != NULL)) {
|
|
GList *old_streams = demux->priv->old_streams;
|
|
demux->priv->old_streams = NULL;
|
|
|
|
GST_DEBUG_OBJECT (stream->pad, "Cleaning up old streams");
|
|
g_list_free_full (old_streams,
|
|
(GDestroyNotify) gst_adaptive_demux_stream_free);
|
|
GST_DEBUG_OBJECT (stream->pad, "Cleaning up old streams (done)");
|
|
|
|
/* gst_adaptive_demux_stream_free had temporarily released the manifest_lock.
|
|
* Recheck the cancelled flag.
|
|
*/
|
|
g_mutex_lock (&stream->fragment_download_lock);
|
|
if (G_UNLIKELY (stream->cancelled)) {
|
|
stream->last_ret = GST_FLOW_FLUSHING;
|
|
g_mutex_unlock (&stream->fragment_download_lock);
|
|
goto cancelled;
|
|
}
|
|
g_mutex_unlock (&stream->fragment_download_lock);
|
|
}
|
|
|
|
/* Restarting download, figure out new position
|
|
* FIXME : Move this to a separate function ? */
|
|
if (G_UNLIKELY (stream->restart_download)) {
|
|
GstEvent *seg_event;
|
|
GstClockTime cur, ts = 0;
|
|
gint64 pos;
|
|
|
|
GST_DEBUG_OBJECT (stream->pad,
|
|
"Activating stream due to reconfigure event");
|
|
|
|
if (gst_pad_peer_query_position (stream->pad, GST_FORMAT_TIME, &pos)) {
|
|
ts = (GstClockTime) pos;
|
|
GST_DEBUG_OBJECT (demux, "Downstream position: %"
|
|
GST_TIME_FORMAT, GST_TIME_ARGS (ts));
|
|
} else {
|
|
/* query other pads as some faulty element in the pad's branch might
|
|
* reject position queries. This should be better than using the
|
|
* demux segment position that can be much ahead */
|
|
GList *iter;
|
|
|
|
for (iter = demux->streams; iter != NULL; iter = g_list_next (iter)) {
|
|
GstAdaptiveDemuxStream *cur_stream =
|
|
(GstAdaptiveDemuxStream *) iter->data;
|
|
|
|
if (gst_pad_peer_query_position (cur_stream->pad, GST_FORMAT_TIME,
|
|
&pos)) {
|
|
ts = (GstClockTime) pos;
|
|
GST_DEBUG_OBJECT (stream->pad, "Downstream position: %"
|
|
GST_TIME_FORMAT, GST_TIME_ARGS (ts));
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
GST_ADAPTIVE_DEMUX_SEGMENT_LOCK (demux);
|
|
cur =
|
|
gst_segment_to_stream_time (&stream->segment, GST_FORMAT_TIME,
|
|
stream->segment.position);
|
|
|
|
/* we might have already pushed this data */
|
|
ts = MAX (ts, cur);
|
|
|
|
GST_DEBUG_OBJECT (stream->pad, "Restarting stream at "
|
|
"position %" GST_TIME_FORMAT, GST_TIME_ARGS (ts));
|
|
|
|
if (GST_CLOCK_TIME_IS_VALID (ts)) {
|
|
GstClockTime offset, period_start;
|
|
|
|
offset =
|
|
gst_adaptive_demux_stream_get_presentation_offset (demux, stream);
|
|
period_start = gst_adaptive_demux_get_period_start_time (demux);
|
|
|
|
/* TODO check return */
|
|
gst_adaptive_demux_stream_seek (demux, stream, demux->segment.rate >= 0,
|
|
0, ts, &ts);
|
|
|
|
stream->segment.position = ts - period_start + offset;
|
|
}
|
|
|
|
/* The stream's segment is still correct except for
|
|
* the position, so let's send a new one with the
|
|
* updated position */
|
|
seg_event = gst_event_new_segment (&stream->segment);
|
|
gst_event_set_seqnum (seg_event, demux->priv->segment_seqnum);
|
|
GST_ADAPTIVE_DEMUX_SEGMENT_UNLOCK (demux);
|
|
|
|
GST_DEBUG_OBJECT (stream->pad, "Sending restart segment: %"
|
|
GST_PTR_FORMAT, seg_event);
|
|
gst_pad_push_event (stream->pad, seg_event);
|
|
|
|
stream->discont = TRUE;
|
|
stream->restart_download = FALSE;
|
|
}
|
|
|
|
live = gst_adaptive_demux_is_live (demux);
|
|
|
|
/* Get information about the fragment to download */
|
|
GST_DEBUG_OBJECT (demux, "Calling update_fragment_info");
|
|
ret = gst_adaptive_demux_stream_update_fragment_info (demux, stream);
|
|
GST_DEBUG_OBJECT (stream->pad, "Fragment info update result: %d %s",
|
|
ret, gst_flow_get_name (ret));
|
|
if (ret == GST_FLOW_OK) {
|
|
|
|
/* wait for live fragments to be available */
|
|
if (live) {
|
|
gint64 wait_time =
|
|
gst_adaptive_demux_stream_get_fragment_waiting_time (demux, stream);
|
|
if (wait_time > 0) {
|
|
GstClockTime end_time =
|
|
gst_adaptive_demux_get_monotonic_time (demux) + wait_time;
|
|
|
|
GST_DEBUG_OBJECT (stream->pad, "Download waiting for %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (wait_time));
|
|
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
|
|
g_mutex_lock (&stream->fragment_download_lock);
|
|
if (G_UNLIKELY (stream->cancelled)) {
|
|
g_mutex_unlock (&stream->fragment_download_lock);
|
|
GST_MANIFEST_LOCK (demux);
|
|
stream->last_ret = GST_FLOW_FLUSHING;
|
|
goto cancelled;
|
|
}
|
|
gst_adaptive_demux_wait_until (demux->realtime_clock,
|
|
&stream->fragment_download_cond, &stream->fragment_download_lock,
|
|
end_time);
|
|
g_mutex_unlock (&stream->fragment_download_lock);
|
|
|
|
GST_DEBUG_OBJECT (stream->pad, "Download finished waiting");
|
|
|
|
GST_MANIFEST_LOCK (demux);
|
|
|
|
g_mutex_lock (&stream->fragment_download_lock);
|
|
if (G_UNLIKELY (stream->cancelled)) {
|
|
stream->last_ret = GST_FLOW_FLUSHING;
|
|
g_mutex_unlock (&stream->fragment_download_lock);
|
|
goto cancelled;
|
|
}
|
|
g_mutex_unlock (&stream->fragment_download_lock);
|
|
}
|
|
}
|
|
|
|
stream->last_ret = GST_FLOW_OK;
|
|
|
|
next_download = gst_adaptive_demux_get_monotonic_time (demux);
|
|
ret = gst_adaptive_demux_stream_download_fragment (stream);
|
|
|
|
if (ret == GST_FLOW_FLUSHING) {
|
|
g_mutex_lock (&stream->fragment_download_lock);
|
|
if (G_UNLIKELY (stream->cancelled)) {
|
|
stream->last_ret = GST_FLOW_FLUSHING;
|
|
g_mutex_unlock (&stream->fragment_download_lock);
|
|
goto cancelled;
|
|
}
|
|
g_mutex_unlock (&stream->fragment_download_lock);
|
|
}
|
|
|
|
} else {
|
|
stream->last_ret = ret;
|
|
}
|
|
|
|
switch (ret) {
|
|
case GST_FLOW_OK:
|
|
break; /* all is good, let's go */
|
|
case GST_FLOW_EOS:
|
|
GST_DEBUG_OBJECT (stream->pad, "EOS, checking to stop download loop");
|
|
|
|
/* we push the EOS after releasing the object lock */
|
|
if (gst_adaptive_demux_is_live (demux)
|
|
&& (demux->segment.rate == 1.0
|
|
|| gst_adaptive_demux_stream_in_live_seek_range (demux,
|
|
stream))) {
|
|
GstAdaptiveDemuxClass *demux_class =
|
|
GST_ADAPTIVE_DEMUX_GET_CLASS (demux);
|
|
|
|
/* this might be a fragment download error, refresh the manifest, just in case */
|
|
if (!demux_class->requires_periodical_playlist_update (demux)) {
|
|
ret = gst_adaptive_demux_update_manifest (demux);
|
|
break;
|
|
/* Wait only if we can ensure current manifest has been expired.
|
|
* The meaning "we have next period" *WITH* EOS is that, current
|
|
* period has been ended but we can continue to the next period */
|
|
} else if (!gst_adaptive_demux_has_next_period (demux) &&
|
|
gst_adaptive_demux_stream_wait_manifest_update (demux, stream)) {
|
|
goto end;
|
|
}
|
|
gst_task_stop (stream->download_task);
|
|
if (stream->replaced) {
|
|
goto end;
|
|
}
|
|
} else {
|
|
gst_task_stop (stream->download_task);
|
|
}
|
|
|
|
if (gst_adaptive_demux_combine_flows (demux) == GST_FLOW_EOS) {
|
|
if (gst_adaptive_demux_has_next_period (demux)) {
|
|
GST_DEBUG_OBJECT (stream->pad,
|
|
"Next period available, not sending EOS");
|
|
gst_adaptive_demux_advance_period (demux);
|
|
ret = GST_FLOW_OK;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case GST_FLOW_NOT_LINKED:
|
|
{
|
|
GstFlowReturn ret;
|
|
gst_task_stop (stream->download_task);
|
|
|
|
ret = gst_adaptive_demux_combine_flows (demux);
|
|
if (ret == GST_FLOW_NOT_LINKED) {
|
|
GST_ELEMENT_FLOW_ERROR (demux, ret);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case GST_FLOW_FLUSHING:{
|
|
GList *iter;
|
|
|
|
for (iter = demux->streams; iter; iter = g_list_next (iter)) {
|
|
GstAdaptiveDemuxStream *other;
|
|
|
|
other = iter->data;
|
|
gst_task_stop (other->download_task);
|
|
}
|
|
}
|
|
break;
|
|
|
|
default:
|
|
if (ret <= GST_FLOW_ERROR) {
|
|
gboolean is_live = gst_adaptive_demux_is_live (demux);
|
|
GST_WARNING_OBJECT (demux, "Error while downloading fragment");
|
|
if (++stream->download_error_count > MAX_DOWNLOAD_ERROR_COUNT) {
|
|
goto download_error;
|
|
}
|
|
|
|
g_clear_error (&stream->last_error);
|
|
|
|
/* First try to update the playlist for non-live playlists
|
|
* in case the URIs have changed in the meantime. But only
|
|
* try it the first time, after that we're going to wait a
|
|
* a bit to not flood the server */
|
|
if (stream->download_error_count == 1 && !is_live) {
|
|
/* TODO hlsdemux had more options to this function (boolean and err) */
|
|
|
|
if (gst_adaptive_demux_update_manifest (demux) == GST_FLOW_OK) {
|
|
/* Retry immediately, the playlist actually has changed */
|
|
GST_DEBUG_OBJECT (demux, "Updated the playlist");
|
|
goto end;
|
|
}
|
|
}
|
|
|
|
/* Wait half the fragment duration before retrying */
|
|
next_download += stream->fragment.duration / 2;
|
|
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
|
|
g_mutex_lock (&stream->fragment_download_lock);
|
|
if (G_UNLIKELY (stream->cancelled)) {
|
|
g_mutex_unlock (&stream->fragment_download_lock);
|
|
GST_MANIFEST_LOCK (demux);
|
|
stream->last_ret = GST_FLOW_FLUSHING;
|
|
goto cancelled;
|
|
}
|
|
gst_adaptive_demux_wait_until (demux->realtime_clock,
|
|
&stream->fragment_download_cond, &stream->fragment_download_lock,
|
|
next_download);
|
|
g_mutex_unlock (&stream->fragment_download_lock);
|
|
|
|
GST_DEBUG_OBJECT (demux, "Retrying now");
|
|
|
|
GST_MANIFEST_LOCK (demux);
|
|
|
|
g_mutex_lock (&stream->fragment_download_lock);
|
|
if (G_UNLIKELY (stream->cancelled)) {
|
|
stream->last_ret = GST_FLOW_FLUSHING;
|
|
g_mutex_unlock (&stream->fragment_download_lock);
|
|
goto cancelled;
|
|
}
|
|
g_mutex_unlock (&stream->fragment_download_lock);
|
|
|
|
/* Refetch the playlist now after we waited */
|
|
if (!is_live
|
|
&& gst_adaptive_demux_update_manifest (demux) == GST_FLOW_OK) {
|
|
GST_DEBUG_OBJECT (demux, "Updated the playlist");
|
|
}
|
|
goto end;
|
|
}
|
|
break;
|
|
}
|
|
|
|
end_of_manifest:
|
|
if (G_UNLIKELY (ret == GST_FLOW_EOS)) {
|
|
if (GST_OBJECT_PARENT (stream->pad) != NULL) {
|
|
if (demux->next_streams == NULL && demux->prepared_streams == NULL) {
|
|
GST_DEBUG_OBJECT (stream->src, "Pushing EOS on pad");
|
|
gst_adaptive_demux_stream_push_event (stream, gst_event_new_eos ());
|
|
} else {
|
|
GST_DEBUG_OBJECT (stream->src,
|
|
"Stream is EOS, but we're switching fragments. Not sending.");
|
|
}
|
|
} else {
|
|
GST_ERROR_OBJECT (demux, "Can't push EOS on non-exposed pad");
|
|
goto download_error;
|
|
}
|
|
}
|
|
|
|
end:
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
GST_LOG_OBJECT (stream->pad, "download loop end");
|
|
return;
|
|
|
|
cancelled:
|
|
{
|
|
GST_DEBUG_OBJECT (stream->pad, "Stream has been cancelled");
|
|
goto end;
|
|
}
|
|
download_error:
|
|
{
|
|
GstMessage *msg;
|
|
|
|
if (stream->last_error) {
|
|
gchar *debug = g_strdup_printf ("Error on stream %s:%s",
|
|
GST_DEBUG_PAD_NAME (stream->pad));
|
|
msg =
|
|
gst_message_new_error (GST_OBJECT_CAST (demux), stream->last_error,
|
|
debug);
|
|
GST_ERROR_OBJECT (stream->pad, "Download error: %s",
|
|
stream->last_error->message);
|
|
g_free (debug);
|
|
} else {
|
|
GError *err =
|
|
g_error_new (GST_RESOURCE_ERROR, GST_RESOURCE_ERROR_NOT_FOUND,
|
|
_("Couldn't download fragments"));
|
|
msg =
|
|
gst_message_new_error (GST_OBJECT_CAST (demux), err,
|
|
"Fragment downloading has failed consecutive times");
|
|
g_error_free (err);
|
|
GST_ERROR_OBJECT (stream->pad,
|
|
"Download error: Couldn't download fragments, too many failures");
|
|
}
|
|
|
|
gst_task_stop (stream->download_task);
|
|
if (stream->src) {
|
|
GstElement *src = stream->src;
|
|
|
|
stream->src = NULL;
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
gst_element_set_locked_state (src, TRUE);
|
|
gst_element_set_state (src, GST_STATE_NULL);
|
|
gst_bin_remove (GST_BIN_CAST (demux), src);
|
|
GST_MANIFEST_LOCK (demux);
|
|
}
|
|
|
|
gst_element_post_message (GST_ELEMENT_CAST (demux), msg);
|
|
|
|
goto end;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_adaptive_demux_updates_loop (GstAdaptiveDemux * demux)
|
|
{
|
|
GstClockTime next_update;
|
|
GstAdaptiveDemuxClass *klass = GST_ADAPTIVE_DEMUX_GET_CLASS (demux);
|
|
|
|
/* Loop for updating of the playlist. This periodically checks if
|
|
* the playlist is updated and does so, then signals the streaming
|
|
* thread in case it can continue downloading now. */
|
|
|
|
/* block until the next scheduled update or the signal to quit this thread */
|
|
GST_DEBUG_OBJECT (demux, "Started updates task");
|
|
|
|
GST_MANIFEST_LOCK (demux);
|
|
|
|
next_update =
|
|
gst_adaptive_demux_get_monotonic_time (demux) +
|
|
klass->get_manifest_update_interval (demux) * GST_USECOND;
|
|
|
|
/* Updating playlist only needed for live playlists */
|
|
while (gst_adaptive_demux_is_live (demux)) {
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
|
|
/* Wait here until we should do the next update or we're cancelled */
|
|
GST_DEBUG_OBJECT (demux, "Wait for next playlist update");
|
|
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
|
|
g_mutex_lock (&demux->priv->updates_timed_lock);
|
|
if (demux->priv->stop_updates_task) {
|
|
g_mutex_unlock (&demux->priv->updates_timed_lock);
|
|
goto quit;
|
|
}
|
|
gst_adaptive_demux_wait_until (demux->realtime_clock,
|
|
&demux->priv->updates_timed_cond,
|
|
&demux->priv->updates_timed_lock, next_update);
|
|
g_mutex_unlock (&demux->priv->updates_timed_lock);
|
|
|
|
g_mutex_lock (&demux->priv->updates_timed_lock);
|
|
if (demux->priv->stop_updates_task) {
|
|
g_mutex_unlock (&demux->priv->updates_timed_lock);
|
|
goto quit;
|
|
}
|
|
g_mutex_unlock (&demux->priv->updates_timed_lock);
|
|
|
|
GST_MANIFEST_LOCK (demux);
|
|
|
|
GST_DEBUG_OBJECT (demux, "Updating playlist");
|
|
|
|
ret = gst_adaptive_demux_update_manifest (demux);
|
|
|
|
if (ret == GST_FLOW_EOS) {
|
|
} else if (ret != GST_FLOW_OK) {
|
|
/* update_failed_count is used only here, no need to protect it */
|
|
demux->priv->update_failed_count++;
|
|
if (demux->priv->update_failed_count <= DEFAULT_FAILED_COUNT) {
|
|
GST_WARNING_OBJECT (demux, "Could not update the playlist, flow: %s",
|
|
gst_flow_get_name (ret));
|
|
next_update = gst_adaptive_demux_get_monotonic_time (demux)
|
|
+ klass->get_manifest_update_interval (demux) * GST_USECOND;
|
|
} else {
|
|
GST_ELEMENT_ERROR (demux, STREAM, FAILED,
|
|
(_("Internal data stream error.")), ("Could not update playlist"));
|
|
GST_DEBUG_OBJECT (demux, "Stopped updates task because of error");
|
|
gst_task_stop (demux->priv->updates_task);
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
goto end;
|
|
}
|
|
} else {
|
|
GST_DEBUG_OBJECT (demux, "Updated playlist successfully");
|
|
demux->priv->update_failed_count = 0;
|
|
next_update =
|
|
gst_adaptive_demux_get_monotonic_time (demux) +
|
|
klass->get_manifest_update_interval (demux) * GST_USECOND;
|
|
|
|
/* Wake up download tasks */
|
|
g_mutex_lock (&demux->priv->manifest_update_lock);
|
|
g_cond_broadcast (&demux->priv->manifest_cond);
|
|
g_mutex_unlock (&demux->priv->manifest_update_lock);
|
|
}
|
|
}
|
|
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
|
|
quit:
|
|
{
|
|
GST_DEBUG_OBJECT (demux, "Stop updates task request detected.");
|
|
}
|
|
|
|
end:
|
|
{
|
|
return;
|
|
}
|
|
}
|
|
|
|
/* must be called with manifest_lock taken */
|
|
static gboolean
|
|
gst_adaptive_demux_stream_push_event (GstAdaptiveDemuxStream * stream,
|
|
GstEvent * event)
|
|
{
|
|
gboolean ret;
|
|
GstPad *pad;
|
|
GstAdaptiveDemux *demux = stream->demux;
|
|
|
|
if (GST_EVENT_TYPE (event) == GST_EVENT_EOS) {
|
|
stream->eos = TRUE;
|
|
}
|
|
|
|
pad = gst_object_ref (GST_ADAPTIVE_DEMUX_STREAM_PAD (stream));
|
|
|
|
/* Can't push events holding the manifest lock */
|
|
GST_MANIFEST_UNLOCK (demux);
|
|
|
|
GST_DEBUG_OBJECT (GST_ADAPTIVE_DEMUX_STREAM_PAD (stream),
|
|
"Pushing event %" GST_PTR_FORMAT, event);
|
|
|
|
ret = gst_pad_push_event (pad, event);
|
|
|
|
gst_object_unref (pad);
|
|
|
|
GST_MANIFEST_LOCK (demux);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* must be called with manifest_lock taken */
|
|
static gboolean
|
|
gst_adaptive_demux_is_live (GstAdaptiveDemux * demux)
|
|
{
|
|
GstAdaptiveDemuxClass *klass = GST_ADAPTIVE_DEMUX_GET_CLASS (demux);
|
|
|
|
if (klass->is_live)
|
|
return klass->is_live (demux);
|
|
return FALSE;
|
|
}
|
|
|
|
/* must be called with manifest_lock taken */
|
|
static GstFlowReturn
|
|
gst_adaptive_demux_stream_seek (GstAdaptiveDemux * demux,
|
|
GstAdaptiveDemuxStream * stream, gboolean forward, GstSeekFlags flags,
|
|
GstClockTime ts, GstClockTime * final_ts)
|
|
{
|
|
GstAdaptiveDemuxClass *klass = GST_ADAPTIVE_DEMUX_GET_CLASS (demux);
|
|
|
|
if (klass->stream_seek)
|
|
return klass->stream_seek (stream, forward, flags, ts, final_ts);
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
|
|
/* must be called with manifest_lock taken */
|
|
static gboolean
|
|
gst_adaptive_demux_stream_has_next_fragment (GstAdaptiveDemux * demux,
|
|
GstAdaptiveDemuxStream * stream)
|
|
{
|
|
GstAdaptiveDemuxClass *klass = GST_ADAPTIVE_DEMUX_GET_CLASS (demux);
|
|
gboolean ret = TRUE;
|
|
|
|
if (klass->stream_has_next_fragment)
|
|
ret = klass->stream_has_next_fragment (stream);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* must be called with manifest_lock taken */
|
|
/* Called from:
|
|
* the ::finish_fragment() handlers when an *actual* fragment is done
|
|
* */
|
|
GstFlowReturn
|
|
gst_adaptive_demux_stream_advance_fragment (GstAdaptiveDemux * demux,
|
|
GstAdaptiveDemuxStream * stream, GstClockTime duration)
|
|
{
|
|
GstFlowReturn ret;
|
|
|
|
if (stream->last_ret == GST_FLOW_OK) {
|
|
stream->last_ret =
|
|
gst_adaptive_demux_stream_advance_fragment_unlocked (demux, stream,
|
|
duration);
|
|
}
|
|
ret = stream->last_ret;
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* must be called with manifest_lock taken */
|
|
GstFlowReturn
|
|
gst_adaptive_demux_stream_advance_fragment_unlocked (GstAdaptiveDemux * demux,
|
|
GstAdaptiveDemuxStream * stream, GstClockTime duration)
|
|
{
|
|
GstAdaptiveDemuxClass *klass = GST_ADAPTIVE_DEMUX_GET_CLASS (demux);
|
|
GstFlowReturn ret;
|
|
|
|
g_return_val_if_fail (klass->stream_advance_fragment != NULL, GST_FLOW_ERROR);
|
|
|
|
GST_LOG_OBJECT (stream->pad,
|
|
"timestamp %" GST_TIME_FORMAT " duration:%" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (stream->fragment.timestamp), GST_TIME_ARGS (duration));
|
|
|
|
stream->download_error_count = 0;
|
|
g_clear_error (&stream->last_error);
|
|
|
|
/* FIXME - url has no indication of byte ranges for subsegments */
|
|
/* FIXME : All those time statistics are biased, since they are calculated
|
|
* *AFTER* the queue2, which might be blocking. They should ideally be
|
|
* calculated *before* queue2 in the uri_handler_probe */
|
|
gst_element_post_message (GST_ELEMENT_CAST (demux),
|
|
gst_message_new_element (GST_OBJECT_CAST (demux),
|
|
gst_structure_new (GST_ADAPTIVE_DEMUX_STATISTICS_MESSAGE_NAME,
|
|
"manifest-uri", G_TYPE_STRING,
|
|
demux->manifest_uri, "uri", G_TYPE_STRING,
|
|
stream->fragment.uri, "fragment-start-time",
|
|
GST_TYPE_CLOCK_TIME, stream->download_start_time,
|
|
"fragment-stop-time", GST_TYPE_CLOCK_TIME,
|
|
gst_util_get_timestamp (), "fragment-size", G_TYPE_UINT64,
|
|
stream->download_total_bytes, "fragment-download-time",
|
|
GST_TYPE_CLOCK_TIME, stream->last_download_time, NULL)));
|
|
|
|
/* Don't update to the end of the segment if in reverse playback */
|
|
GST_ADAPTIVE_DEMUX_SEGMENT_LOCK (demux);
|
|
if (GST_CLOCK_TIME_IS_VALID (duration) && demux->segment.rate > 0) {
|
|
GstClockTime offset =
|
|
gst_adaptive_demux_stream_get_presentation_offset (demux, stream);
|
|
GstClockTime period_start =
|
|
gst_adaptive_demux_get_period_start_time (demux);
|
|
|
|
stream->segment.position += duration;
|
|
|
|
/* Convert from position inside the stream's segment to the demuxer's
|
|
* segment, they are not necessarily the same */
|
|
if (stream->segment.position - offset + period_start >
|
|
demux->segment.position)
|
|
demux->segment.position =
|
|
stream->segment.position - offset + period_start;
|
|
}
|
|
GST_ADAPTIVE_DEMUX_SEGMENT_UNLOCK (demux);
|
|
|
|
/* When advancing with a non 1.0 rate on live streams, we need to check
|
|
* the live seeking range again to make sure we can still advance to
|
|
* that position */
|
|
if (demux->segment.rate != 1.0 && gst_adaptive_demux_is_live (demux)) {
|
|
if (!gst_adaptive_demux_stream_in_live_seek_range (demux, stream))
|
|
ret = GST_FLOW_EOS;
|
|
else
|
|
ret = klass->stream_advance_fragment (stream);
|
|
} else if (gst_adaptive_demux_is_live (demux)
|
|
|| gst_adaptive_demux_stream_has_next_fragment (demux, stream)) {
|
|
ret = klass->stream_advance_fragment (stream);
|
|
} else {
|
|
ret = GST_FLOW_EOS;
|
|
}
|
|
|
|
stream->download_start_time =
|
|
GST_TIME_AS_USECONDS (gst_adaptive_demux_get_monotonic_time (demux));
|
|
|
|
if (ret == GST_FLOW_OK) {
|
|
if (gst_adaptive_demux_stream_select_bitrate (demux, stream,
|
|
gst_adaptive_demux_stream_update_current_bitrate (demux, stream))) {
|
|
stream->need_header = TRUE;
|
|
ret = (GstFlowReturn) GST_ADAPTIVE_DEMUX_FLOW_SWITCH;
|
|
}
|
|
|
|
/* the subclass might want to switch pads */
|
|
if (G_UNLIKELY (demux->next_streams)) {
|
|
GList *iter;
|
|
gboolean can_expose = TRUE;
|
|
|
|
gst_task_stop (stream->download_task);
|
|
|
|
ret = GST_FLOW_EOS;
|
|
|
|
for (iter = demux->streams; iter; iter = g_list_next (iter)) {
|
|
/* Only expose if all streams are now cancelled or finished downloading */
|
|
GstAdaptiveDemuxStream *other = iter->data;
|
|
if (other != stream) {
|
|
g_mutex_lock (&other->fragment_download_lock);
|
|
can_expose &= (other->cancelled == TRUE
|
|
|| other->download_finished == TRUE);
|
|
g_mutex_unlock (&other->fragment_download_lock);
|
|
}
|
|
}
|
|
|
|
if (can_expose) {
|
|
GST_DEBUG_OBJECT (demux, "Subclass wants new pads "
|
|
"to do bitrate switching");
|
|
gst_adaptive_demux_prepare_streams (demux, FALSE);
|
|
gst_adaptive_demux_start_tasks (demux, TRUE);
|
|
} else {
|
|
GST_LOG_OBJECT (demux, "Not switching yet - ongoing downloads");
|
|
}
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* must be called with manifest_lock taken */
|
|
static gboolean
|
|
gst_adaptive_demux_stream_select_bitrate (GstAdaptiveDemux *
|
|
demux, GstAdaptiveDemuxStream * stream, guint64 bitrate)
|
|
{
|
|
GstAdaptiveDemuxClass *klass = GST_ADAPTIVE_DEMUX_GET_CLASS (demux);
|
|
|
|
if (klass->stream_select_bitrate)
|
|
return klass->stream_select_bitrate (stream, bitrate);
|
|
return FALSE;
|
|
}
|
|
|
|
/* must be called with manifest_lock taken */
|
|
static GstFlowReturn
|
|
gst_adaptive_demux_stream_update_fragment_info (GstAdaptiveDemux * demux,
|
|
GstAdaptiveDemuxStream * stream)
|
|
{
|
|
GstAdaptiveDemuxClass *klass = GST_ADAPTIVE_DEMUX_GET_CLASS (demux);
|
|
GstFlowReturn ret;
|
|
|
|
g_return_val_if_fail (klass->stream_update_fragment_info != NULL,
|
|
GST_FLOW_ERROR);
|
|
|
|
/* Make sure the sub-class will update bitrate, or else
|
|
* we will later */
|
|
stream->fragment.bitrate = 0;
|
|
stream->fragment.finished = FALSE;
|
|
|
|
GST_LOG_OBJECT (stream->pad, "position %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (stream->segment.position));
|
|
|
|
ret = klass->stream_update_fragment_info (stream);
|
|
|
|
GST_LOG_OBJECT (stream->pad, "ret:%s uri:%s", gst_flow_get_name (ret),
|
|
stream->fragment.uri);
|
|
if (ret == GST_FLOW_OK) {
|
|
GST_LOG_OBJECT (stream->pad,
|
|
"timestamp %" GST_TIME_FORMAT " duration:%" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (stream->fragment.timestamp),
|
|
GST_TIME_ARGS (stream->fragment.duration));
|
|
GST_LOG_OBJECT (stream->pad,
|
|
"range start:%" G_GINT64_FORMAT " end:%" G_GINT64_FORMAT,
|
|
stream->fragment.range_start, stream->fragment.range_end);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* must be called with manifest_lock taken */
|
|
static gint64
|
|
gst_adaptive_demux_stream_get_fragment_waiting_time (GstAdaptiveDemux *
|
|
demux, GstAdaptiveDemuxStream * stream)
|
|
{
|
|
GstAdaptiveDemuxClass *klass = GST_ADAPTIVE_DEMUX_GET_CLASS (demux);
|
|
|
|
if (klass->stream_get_fragment_waiting_time)
|
|
return klass->stream_get_fragment_waiting_time (stream);
|
|
return 0;
|
|
}
|
|
|
|
/* must be called with manifest_lock taken */
|
|
static GstFlowReturn
|
|
gst_adaptive_demux_update_manifest_default (GstAdaptiveDemux * demux)
|
|
{
|
|
GstAdaptiveDemuxClass *klass = GST_ADAPTIVE_DEMUX_GET_CLASS (demux);
|
|
GstFragment *download;
|
|
GstBuffer *buffer;
|
|
GstFlowReturn ret;
|
|
GError *error = NULL;
|
|
|
|
download = gst_uri_downloader_fetch_uri (demux->downloader,
|
|
demux->manifest_uri, NULL, TRUE, TRUE, TRUE, &error);
|
|
if (download) {
|
|
g_free (demux->manifest_uri);
|
|
g_free (demux->manifest_base_uri);
|
|
if (download->redirect_permanent && download->redirect_uri) {
|
|
demux->manifest_uri = g_strdup (download->redirect_uri);
|
|
demux->manifest_base_uri = NULL;
|
|
} else {
|
|
demux->manifest_uri = g_strdup (download->uri);
|
|
demux->manifest_base_uri = g_strdup (download->redirect_uri);
|
|
}
|
|
|
|
buffer = gst_fragment_get_buffer (download);
|
|
g_object_unref (download);
|
|
ret = klass->update_manifest_data (demux, buffer);
|
|
gst_buffer_unref (buffer);
|
|
/* FIXME: Should the manifest uri vars be reverted to original
|
|
* values if updating fails? */
|
|
} else {
|
|
GST_WARNING_OBJECT (demux, "Failed to download manifest: %s",
|
|
error->message);
|
|
ret = GST_FLOW_NOT_LINKED;
|
|
}
|
|
g_clear_error (&error);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* must be called with manifest_lock taken */
|
|
static GstFlowReturn
|
|
gst_adaptive_demux_update_manifest (GstAdaptiveDemux * demux)
|
|
{
|
|
GstAdaptiveDemuxClass *klass = GST_ADAPTIVE_DEMUX_GET_CLASS (demux);
|
|
GstFlowReturn ret;
|
|
|
|
ret = klass->update_manifest (demux);
|
|
|
|
if (ret == GST_FLOW_OK) {
|
|
GstClockTime duration;
|
|
/* Send an updated duration message */
|
|
duration = klass->get_duration (demux);
|
|
if (duration != GST_CLOCK_TIME_NONE) {
|
|
GST_DEBUG_OBJECT (demux,
|
|
"Sending duration message : %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (duration));
|
|
gst_element_post_message (GST_ELEMENT (demux),
|
|
gst_message_new_duration_changed (GST_OBJECT (demux)));
|
|
} else {
|
|
GST_DEBUG_OBJECT (demux,
|
|
"Duration unknown, can not send the duration message");
|
|
}
|
|
|
|
/* If a manifest changes it's liveness or periodic updateness, we need
|
|
* to start/stop the manifest update task appropriately */
|
|
/* Keep this condition in sync with the one in
|
|
* gst_adaptive_demux_start_manifest_update_task()
|
|
*/
|
|
if (gst_adaptive_demux_is_live (demux) &&
|
|
klass->requires_periodical_playlist_update (demux)) {
|
|
gst_adaptive_demux_start_manifest_update_task (demux);
|
|
} else {
|
|
gst_adaptive_demux_stop_manifest_update_task (demux);
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
void
|
|
gst_adaptive_demux_stream_fragment_clear (GstAdaptiveDemuxStreamFragment * f)
|
|
{
|
|
g_free (f->uri);
|
|
f->uri = NULL;
|
|
f->range_start = 0;
|
|
f->range_end = -1;
|
|
|
|
g_free (f->header_uri);
|
|
f->header_uri = NULL;
|
|
f->header_range_start = 0;
|
|
f->header_range_end = -1;
|
|
|
|
g_free (f->index_uri);
|
|
f->index_uri = NULL;
|
|
f->index_range_start = 0;
|
|
f->index_range_end = -1;
|
|
|
|
f->finished = FALSE;
|
|
}
|
|
|
|
/* must be called with manifest_lock taken */
|
|
static gboolean
|
|
gst_adaptive_demux_has_next_period (GstAdaptiveDemux * demux)
|
|
{
|
|
GstAdaptiveDemuxClass *klass = GST_ADAPTIVE_DEMUX_GET_CLASS (demux);
|
|
gboolean ret = FALSE;
|
|
|
|
if (klass->has_next_period)
|
|
ret = klass->has_next_period (demux);
|
|
GST_DEBUG_OBJECT (demux, "Has next period: %d", ret);
|
|
return ret;
|
|
}
|
|
|
|
/* must be called with manifest_lock taken */
|
|
static void
|
|
gst_adaptive_demux_advance_period (GstAdaptiveDemux * demux)
|
|
{
|
|
GstAdaptiveDemuxClass *klass = GST_ADAPTIVE_DEMUX_GET_CLASS (demux);
|
|
|
|
g_return_if_fail (klass->advance_period != NULL);
|
|
|
|
GST_DEBUG_OBJECT (demux, "Advancing to next period");
|
|
klass->advance_period (demux);
|
|
gst_adaptive_demux_prepare_streams (demux, FALSE);
|
|
gst_adaptive_demux_start_tasks (demux, TRUE);
|
|
}
|
|
|
|
/**
|
|
* gst_adaptive_demux_get_monotonic_time:
|
|
* Returns: a monotonically increasing time, using the system realtime clock
|
|
*/
|
|
GstClockTime
|
|
gst_adaptive_demux_get_monotonic_time (GstAdaptiveDemux * demux)
|
|
{
|
|
g_return_val_if_fail (demux != NULL, GST_CLOCK_TIME_NONE);
|
|
return gst_clock_get_time (demux->realtime_clock);
|
|
}
|
|
|
|
/**
|
|
* gst_adaptive_demux_get_client_now_utc:
|
|
* @demux: #GstAdaptiveDemux
|
|
* Returns: the client's estimate of UTC
|
|
*
|
|
* Used to find the client's estimate of UTC, using the system realtime clock.
|
|
*/
|
|
GDateTime *
|
|
gst_adaptive_demux_get_client_now_utc (GstAdaptiveDemux * demux)
|
|
{
|
|
GstClockTime rtc_now;
|
|
gint64 utc_now;
|
|
GTimeVal gtv;
|
|
|
|
rtc_now = gst_clock_get_time (demux->realtime_clock);
|
|
utc_now = demux->clock_offset + GST_TIME_AS_USECONDS (rtc_now);
|
|
gtv.tv_sec = utc_now / G_TIME_SPAN_SECOND;
|
|
gtv.tv_usec = utc_now % G_TIME_SPAN_SECOND;
|
|
return g_date_time_new_from_timeval_utc (>v);
|
|
}
|
|
|
|
static GstAdaptiveDemuxTimer *
|
|
gst_adaptive_demux_timer_new (GCond * cond, GMutex * mutex)
|
|
{
|
|
GstAdaptiveDemuxTimer *timer;
|
|
|
|
timer = g_slice_new (GstAdaptiveDemuxTimer);
|
|
timer->fired = FALSE;
|
|
timer->cond = cond;
|
|
timer->mutex = mutex;
|
|
timer->ref_count = 1;
|
|
return timer;
|
|
}
|
|
|
|
static GstAdaptiveDemuxTimer *
|
|
gst_adaptive_demux_timer_ref (GstAdaptiveDemuxTimer * timer)
|
|
{
|
|
g_return_val_if_fail (timer != NULL, NULL);
|
|
g_atomic_int_inc (&timer->ref_count);
|
|
return timer;
|
|
}
|
|
|
|
static void
|
|
gst_adaptive_demux_timer_unref (GstAdaptiveDemuxTimer * timer)
|
|
{
|
|
g_return_if_fail (timer != NULL);
|
|
if (g_atomic_int_dec_and_test (&timer->ref_count)) {
|
|
g_slice_free (GstAdaptiveDemuxTimer, timer);
|
|
}
|
|
}
|
|
|
|
/* gst_adaptive_demux_wait_until:
|
|
* A replacement for g_cond_wait_until that uses the clock rather
|
|
* than system time to control the duration of the sleep. Typically
|
|
* clock is actually a #GstSystemClock, in which case this function
|
|
* behaves exactly like g_cond_wait_until. Inside unit tests,
|
|
* the clock is typically a #GstTestClock, which allows tests to run
|
|
* in non-realtime.
|
|
* This function must be called with mutex held.
|
|
*/
|
|
static gboolean
|
|
gst_adaptive_demux_wait_until (GstClock * clock, GCond * cond, GMutex * mutex,
|
|
GstClockTime end_time)
|
|
{
|
|
GstAdaptiveDemuxTimer *timer;
|
|
gboolean fired;
|
|
GstClockReturn res;
|
|
|
|
if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (end_time))) {
|
|
/* for an invalid time, gst_clock_id_wait_async will try to call
|
|
* gst_adaptive_demux_clock_callback from the current thread.
|
|
* It still holds the mutex while doing that, so it will deadlock.
|
|
* g_cond_wait_until would return immediately with false, so we'll do the same.
|
|
*/
|
|
return FALSE;
|
|
}
|
|
timer = gst_adaptive_demux_timer_new (cond, mutex);
|
|
timer->clock_id = gst_clock_new_single_shot_id (clock, end_time);
|
|
res =
|
|
gst_clock_id_wait_async (timer->clock_id,
|
|
gst_adaptive_demux_clock_callback, gst_adaptive_demux_timer_ref (timer),
|
|
(GDestroyNotify) gst_adaptive_demux_timer_unref);
|
|
/* clock does not support asynchronously wait. Assert and return */
|
|
if (res == GST_CLOCK_UNSUPPORTED) {
|
|
gst_clock_id_unref (timer->clock_id);
|
|
gst_adaptive_demux_timer_unref (timer);
|
|
g_return_val_if_reached (TRUE);
|
|
}
|
|
g_assert (!timer->fired);
|
|
/* the gst_adaptive_demux_clock_callback() will signal the
|
|
* cond when the clock's single shot timer fires, or the cond will be
|
|
* signalled by another thread that wants to cause this wait to finish
|
|
* early (e.g. to terminate the waiting thread).
|
|
* There is no need for a while loop here, because that logic is
|
|
* implemented by the function calling gst_adaptive_demux_wait_until() */
|
|
g_cond_wait (cond, mutex);
|
|
fired = timer->fired;
|
|
if (!fired)
|
|
gst_clock_id_unschedule (timer->clock_id);
|
|
gst_clock_id_unref (timer->clock_id);
|
|
gst_adaptive_demux_timer_unref (timer);
|
|
return !fired;
|
|
}
|
|
|
|
static gboolean
|
|
gst_adaptive_demux_clock_callback (GstClock * clock,
|
|
GstClockTime time, GstClockID id, gpointer user_data)
|
|
{
|
|
GstAdaptiveDemuxTimer *timer = (GstAdaptiveDemuxTimer *) user_data;
|
|
g_return_val_if_fail (timer != NULL, FALSE);
|
|
g_mutex_lock (timer->mutex);
|
|
timer->fired = TRUE;
|
|
g_cond_signal (timer->cond);
|
|
g_mutex_unlock (timer->mutex);
|
|
return TRUE;
|
|
}
|