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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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1390 lines
41 KiB
C
1390 lines
41 KiB
C
/* GStreamer
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* Copyright (C) 2012 Smart TV Alliance
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* Author: Thiago Sousa Santos <thiago.sousa.santos@collabora.com>, Collabora Ltd.
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*
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* gstmssdemux.c:
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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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:element-mssdemux
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*
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* Demuxes a Microsoft's Smooth Streaming manifest into its audio and/or video streams.
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*
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*
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*/
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/*
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* == Internals
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*
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* = Smooth streaming in a few lines
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* A SS stream is defined by a xml manifest file. This file has a list of
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* tracks (StreamIndex), each one can have multiple QualityLevels, that define
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* different encoding/bitrates. When playing a track, only one of those
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* QualityLevels can be active at a time (per stream).
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*
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* The StreamIndex defines a URL with {time} and {bitrate} tags that are
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* replaced by values indicated by the fragment start times and the selected
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* QualityLevel, that generates the fragments URLs.
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*
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* Another relevant detail is that the Isomedia fragments for smoothstreaming
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* won't contains a 'moov' atom, nor a 'stsd', so there is no information
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* about the media type/configuration on the fragments, it must be extracted
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* from the Manifest and passed downstream. mssdemux does this via GstCaps.
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*
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* = How mssdemux works
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* There is a gstmssmanifest.c utility that holds the manifest and parses
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* and has functions to extract information from it. mssdemux received the
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* manifest from its sink pad and starts processing it when it gets EOS.
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*
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* The Manifest is parsed and the streams are exposed, 1 pad for each, with
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* a initially selected QualityLevel. Each stream starts its own GstTaks that
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* is responsible for downloading fragments and storing in its own GstDataQueue.
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*
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* The mssdemux starts another GstTask, this one iterates through the streams
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* and selects the fragment with the smaller timestamp to push and repeats this.
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*
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* When a new connection-speed is set, mssdemux evaluates the available
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* QualityLevels and might decide to switch to another one. In this case it
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* exposes new pads for each stream, pushes EOS to the old ones and removes
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* them. This should make decodebin2 pad switching mechanism act and the
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* switch would be smooth for the final user.
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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 "gst/gst-i18n-plugin.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "gstmssdemux.h"
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GST_DEBUG_CATEGORY (mssdemux_debug);
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#define DEFAULT_CONNECTION_SPEED 0
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#define DEFAULT_MAX_QUEUE_SIZE_BUFFERS 0
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#define DEFAULT_BITRATE_LIMIT 0.8
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#define DOWNLOAD_RATE_MAX_HISTORY_LENGTH 5
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#define MAX_DOWNLOAD_ERROR_COUNT 3
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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_MAX_QUEUE_SIZE_BUFFERS,
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PROP_BITRATE_LIMIT,
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PROP_LAST
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};
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static GstStaticPadTemplate gst_mss_demux_sink_template =
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GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("application/vnd.ms-sstr+xml")
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);
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static GstStaticPadTemplate gst_mss_demux_videosrc_template =
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GST_STATIC_PAD_TEMPLATE ("video_%02u",
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GST_PAD_SRC,
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GST_PAD_SOMETIMES,
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GST_STATIC_CAPS_ANY);
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static GstStaticPadTemplate gst_mss_demux_audiosrc_template =
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GST_STATIC_PAD_TEMPLATE ("audio_%02u",
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GST_PAD_SRC,
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GST_PAD_SOMETIMES,
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GST_STATIC_CAPS_ANY);
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#define gst_mss_demux_parent_class parent_class
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G_DEFINE_TYPE (GstMssDemux, gst_mss_demux, GST_TYPE_ELEMENT);
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static void gst_mss_demux_dispose (GObject * object);
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static void gst_mss_demux_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_mss_demux_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static GstStateChangeReturn gst_mss_demux_change_state (GstElement * element,
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GstStateChange transition);
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static GstFlowReturn gst_mss_demux_chain (GstPad * pad, GstObject * parent,
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GstBuffer * buffer);
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static GstFlowReturn gst_mss_demux_event (GstPad * pad, GstObject * parent,
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GstEvent * event);
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static gboolean gst_mss_demux_src_query (GstPad * pad, GstObject * parent,
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GstQuery * query);
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static void gst_mss_demux_download_loop (GstMssDemuxStream * stream);
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static void gst_mss_demux_stream_loop (GstMssDemux * mssdemux);
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static void gst_mss_demux_stream_store_object (GstMssDemuxStream * stream,
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GstMiniObject * obj);
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static gboolean gst_mss_demux_process_manifest (GstMssDemux * mssdemux);
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static void
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gst_mss_demux_class_init (GstMssDemuxClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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gobject_class = (GObjectClass *) klass;
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gstelement_class = (GstElementClass *) klass;
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&gst_mss_demux_sink_template));
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&gst_mss_demux_videosrc_template));
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&gst_mss_demux_audiosrc_template));
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gst_element_class_set_static_metadata (gstelement_class,
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"Smooth Streaming demuxer", "Demuxer",
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"Parse and demultiplex a Smooth Streaming manifest into audio and video "
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"streams", "Thiago Santos <thiago.sousa.santos@collabora.com>");
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gobject_class->dispose = gst_mss_demux_dispose;
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gobject_class->set_property = gst_mss_demux_set_property;
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gobject_class->get_property = gst_mss_demux_get_property;
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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 = unknown)",
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0, G_MAXUINT / 1000, DEFAULT_CONNECTION_SPEED,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_MAX_QUEUE_SIZE_BUFFERS,
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g_param_spec_uint ("max-queue-size-buffers", "Max queue size in buffers",
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"Maximum buffers that can be stored in each internal stream queue "
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"(0 = infinite)", 0, G_MAXUINT, DEFAULT_MAX_QUEUE_SIZE_BUFFERS,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_BITRATE_LIMIT,
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g_param_spec_float ("bitrate-limit",
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"Bitrate limit in %",
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"Limit of the available bitrate to use when switching to alternates.",
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0, 1, DEFAULT_BITRATE_LIMIT,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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gstelement_class->change_state =
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GST_DEBUG_FUNCPTR (gst_mss_demux_change_state);
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GST_DEBUG_CATEGORY_INIT (mssdemux_debug, "mssdemux", 0, "mssdemux plugin");
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}
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static void
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gst_mss_demux_init (GstMssDemux * mssdemux)
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{
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mssdemux->sinkpad =
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gst_pad_new_from_static_template (&gst_mss_demux_sink_template, "sink");
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gst_pad_set_chain_function (mssdemux->sinkpad,
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GST_DEBUG_FUNCPTR (gst_mss_demux_chain));
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gst_pad_set_event_function (mssdemux->sinkpad,
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GST_DEBUG_FUNCPTR (gst_mss_demux_event));
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gst_element_add_pad (GST_ELEMENT_CAST (mssdemux), mssdemux->sinkpad);
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g_rec_mutex_init (&mssdemux->stream_lock);
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mssdemux->stream_task =
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gst_task_new ((GstTaskFunction) gst_mss_demux_stream_loop, mssdemux,
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NULL);
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gst_task_set_lock (mssdemux->stream_task, &mssdemux->stream_lock);
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mssdemux->data_queue_max_size = DEFAULT_MAX_QUEUE_SIZE_BUFFERS;
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mssdemux->bitrate_limit = DEFAULT_BITRATE_LIMIT;
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mssdemux->have_group_id = FALSE;
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mssdemux->group_id = G_MAXUINT;
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}
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static gboolean
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_data_queue_check_full (GstDataQueue * queue, guint visible, guint bytes,
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guint64 time, gpointer checkdata)
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{
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GstMssDemuxStream *stream = checkdata;
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GstMssDemux *mssdemux = stream->parent;
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if (mssdemux->data_queue_max_size == 0)
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return FALSE; /* never full */
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return visible >= mssdemux->data_queue_max_size;
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}
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static GstMssDemuxStream *
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gst_mss_demux_stream_new (GstMssDemux * mssdemux,
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GstMssStream * manifeststream, GstPad * srcpad)
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{
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GstMssDemuxStream *stream;
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stream = g_new0 (GstMssDemuxStream, 1);
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stream->downloader = gst_uri_downloader_new ();
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stream->dataqueue =
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gst_data_queue_new (_data_queue_check_full, NULL, NULL, stream);
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/* Downloading task */
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g_rec_mutex_init (&stream->download_lock);
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stream->download_task =
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gst_task_new ((GstTaskFunction) gst_mss_demux_download_loop, stream,
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NULL);
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gst_task_set_lock (stream->download_task, &stream->download_lock);
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stream->pad = srcpad;
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stream->manifest_stream = manifeststream;
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stream->parent = mssdemux;
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gst_download_rate_init (&stream->download_rate);
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gst_download_rate_set_max_length (&stream->download_rate,
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DOWNLOAD_RATE_MAX_HISTORY_LENGTH);
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return stream;
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}
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static void
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gst_mss_demux_stream_free (GstMssDemuxStream * stream)
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{
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if (stream->download_task) {
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if (GST_TASK_STATE (stream->download_task) != GST_TASK_STOPPED) {
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GST_DEBUG_OBJECT (stream->parent, "Leaving streaming task %s:%s",
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GST_DEBUG_PAD_NAME (stream->pad));
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gst_uri_downloader_cancel (stream->downloader);
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gst_task_stop (stream->download_task);
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g_rec_mutex_lock (&stream->download_lock);
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g_rec_mutex_unlock (&stream->download_lock);
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GST_LOG_OBJECT (stream->parent, "Waiting for task to finish");
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gst_task_join (stream->download_task);
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GST_LOG_OBJECT (stream->parent, "Finished");
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}
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gst_object_unref (stream->download_task);
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g_rec_mutex_clear (&stream->download_lock);
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stream->download_task = NULL;
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}
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gst_download_rate_deinit (&stream->download_rate);
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if (stream->pending_newsegment) {
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gst_event_unref (stream->pending_newsegment);
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stream->pending_newsegment = NULL;
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}
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if (stream->downloader != NULL) {
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g_object_unref (stream->downloader);
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stream->downloader = NULL;
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}
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if (stream->dataqueue) {
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g_object_unref (stream->dataqueue);
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stream->dataqueue = NULL;
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}
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if (stream->pad) {
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gst_object_unref (stream->pad);
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stream->pad = NULL;
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}
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if (stream->caps)
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gst_caps_unref (stream->caps);
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g_free (stream);
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}
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static void
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gst_mss_demux_reset (GstMssDemux * mssdemux)
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{
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GSList *iter;
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for (iter = mssdemux->streams; iter; iter = g_slist_next (iter)) {
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GstMssDemuxStream *stream = iter->data;
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if (stream->downloader)
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gst_uri_downloader_cancel (stream->downloader);
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gst_data_queue_set_flushing (stream->dataqueue, TRUE);
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}
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if (GST_TASK_STATE (mssdemux->stream_task) != GST_TASK_STOPPED) {
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gst_task_stop (mssdemux->stream_task);
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g_rec_mutex_lock (&mssdemux->stream_lock);
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g_rec_mutex_unlock (&mssdemux->stream_lock);
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gst_task_join (mssdemux->stream_task);
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}
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if (mssdemux->manifest_buffer) {
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gst_buffer_unref (mssdemux->manifest_buffer);
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mssdemux->manifest_buffer = NULL;
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}
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for (iter = mssdemux->streams; iter; iter = g_slist_next (iter)) {
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GstMssDemuxStream *stream = iter->data;
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if (stream->pad)
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gst_element_remove_pad (GST_ELEMENT_CAST (mssdemux), stream->pad);
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gst_mss_demux_stream_free (stream);
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}
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g_slist_free (mssdemux->streams);
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mssdemux->streams = NULL;
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if (mssdemux->manifest) {
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gst_mss_manifest_free (mssdemux->manifest);
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mssdemux->manifest = NULL;
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}
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mssdemux->n_videos = mssdemux->n_audios = 0;
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g_free (mssdemux->base_url);
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mssdemux->base_url = NULL;
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g_free (mssdemux->manifest_uri);
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mssdemux->manifest_uri = NULL;
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mssdemux->have_group_id = FALSE;
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mssdemux->group_id = G_MAXUINT;
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}
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static void
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gst_mss_demux_dispose (GObject * object)
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{
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GstMssDemux *mssdemux = GST_MSS_DEMUX_CAST (object);
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gst_mss_demux_reset (mssdemux);
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if (mssdemux->stream_task) {
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gst_object_unref (mssdemux->stream_task);
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g_rec_mutex_clear (&mssdemux->stream_lock);
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mssdemux->stream_task = NULL;
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}
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G_OBJECT_CLASS (parent_class)->dispose (object);
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}
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static void
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gst_mss_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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GstMssDemux *mssdemux = GST_MSS_DEMUX (object);
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switch (prop_id) {
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case PROP_CONNECTION_SPEED:
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GST_OBJECT_LOCK (mssdemux);
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mssdemux->connection_speed = g_value_get_uint (value) * 1000;
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mssdemux->update_bitrates = TRUE;
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GST_DEBUG_OBJECT (mssdemux, "Connection speed set to %" G_GUINT64_FORMAT,
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mssdemux->connection_speed);
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GST_OBJECT_UNLOCK (mssdemux);
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break;
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case PROP_MAX_QUEUE_SIZE_BUFFERS:
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mssdemux->data_queue_max_size = g_value_get_uint (value);
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break;
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case PROP_BITRATE_LIMIT:
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mssdemux->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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}
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static void
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gst_mss_demux_get_property (GObject * object, guint prop_id, GValue * value,
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GParamSpec * pspec)
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{
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GstMssDemux *mssdemux = GST_MSS_DEMUX (object);
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switch (prop_id) {
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case PROP_CONNECTION_SPEED:
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g_value_set_uint (value, mssdemux->connection_speed / 1000);
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break;
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case PROP_MAX_QUEUE_SIZE_BUFFERS:
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g_value_set_uint (value, mssdemux->data_queue_max_size);
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break;
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case PROP_BITRATE_LIMIT:
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g_value_set_float (value, mssdemux->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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}
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static GstStateChangeReturn
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gst_mss_demux_change_state (GstElement * element, GstStateChange transition)
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{
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GstMssDemux *mssdemux = GST_MSS_DEMUX_CAST (element);
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GstStateChangeReturn result = GST_STATE_CHANGE_FAILURE;
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switch (transition) {
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case GST_STATE_CHANGE_PAUSED_TO_READY:
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gst_mss_demux_reset (mssdemux);
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break;
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case GST_STATE_CHANGE_READY_TO_NULL:
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break;
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default:
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break;
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}
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result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
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switch (transition) {
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case GST_STATE_CHANGE_READY_TO_PAUSED:{
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gst_segment_init (&mssdemux->segment, GST_FORMAT_TIME);
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break;
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}
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default:
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break;
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}
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return result;
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}
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static GstFlowReturn
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gst_mss_demux_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
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{
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GstMssDemux *mssdemux = GST_MSS_DEMUX_CAST (parent);
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if (mssdemux->manifest_buffer == NULL)
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mssdemux->manifest_buffer = buffer;
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else
|
|
mssdemux->manifest_buffer =
|
|
gst_buffer_append (mssdemux->manifest_buffer, buffer);
|
|
|
|
GST_INFO_OBJECT (mssdemux, "Received manifest buffer, total size is %i bytes",
|
|
(gint) gst_buffer_get_size (mssdemux->manifest_buffer));
|
|
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
static void
|
|
gst_mss_demux_start (GstMssDemux * mssdemux)
|
|
{
|
|
GSList *iter;
|
|
|
|
GST_INFO_OBJECT (mssdemux, "Starting streams' tasks");
|
|
for (iter = mssdemux->streams; iter; iter = g_slist_next (iter)) {
|
|
GstMssDemuxStream *stream = iter->data;
|
|
gst_task_start (stream->download_task);
|
|
}
|
|
|
|
gst_task_start (mssdemux->stream_task);
|
|
}
|
|
|
|
static gboolean
|
|
gst_mss_demux_push_src_event (GstMssDemux * mssdemux, GstEvent * event)
|
|
{
|
|
GSList *iter;
|
|
gboolean ret = TRUE;
|
|
|
|
for (iter = mssdemux->streams; iter; iter = g_slist_next (iter)) {
|
|
GstMssDemuxStream *stream = iter->data;
|
|
gst_event_ref (event);
|
|
ret = ret & gst_pad_push_event (stream->pad, event);
|
|
}
|
|
gst_event_unref (event);
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_mss_demux_event (GstPad * pad, GstObject * parent, GstEvent * event)
|
|
{
|
|
GstMssDemux *mssdemux = GST_MSS_DEMUX_CAST (parent);
|
|
gboolean forward = TRUE;
|
|
gboolean ret = TRUE;
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_FLUSH_STOP:
|
|
gst_mss_demux_reset (mssdemux);
|
|
break;
|
|
case GST_EVENT_EOS:
|
|
if (mssdemux->manifest_buffer == NULL) {
|
|
GST_WARNING_OBJECT (mssdemux, "Received EOS without a manifest.");
|
|
break;
|
|
}
|
|
GST_INFO_OBJECT (mssdemux, "Received EOS");
|
|
|
|
if (gst_mss_demux_process_manifest (mssdemux))
|
|
gst_mss_demux_start (mssdemux);
|
|
forward = FALSE;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (forward) {
|
|
ret = gst_pad_event_default (pad, parent, event);
|
|
} else {
|
|
gst_event_unref (event);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
gst_mss_demux_stop_tasks (GstMssDemux * mssdemux, gboolean immediate)
|
|
{
|
|
GSList *iter;
|
|
|
|
for (iter = mssdemux->streams; iter; iter = g_slist_next (iter)) {
|
|
GstMssDemuxStream *stream = iter->data;
|
|
|
|
gst_data_queue_set_flushing (stream->dataqueue, TRUE);
|
|
|
|
stream->cancelled = TRUE;
|
|
if (immediate)
|
|
gst_uri_downloader_cancel (stream->downloader);
|
|
gst_task_pause (stream->download_task);
|
|
}
|
|
gst_task_pause (mssdemux->stream_task);
|
|
|
|
for (iter = mssdemux->streams; iter; iter = g_slist_next (iter)) {
|
|
GstMssDemuxStream *stream = iter->data;
|
|
g_rec_mutex_lock (&stream->download_lock);
|
|
stream->cancelled = FALSE;
|
|
stream->download_error_count = 0;
|
|
}
|
|
g_rec_mutex_lock (&mssdemux->stream_lock);
|
|
}
|
|
|
|
static void
|
|
gst_mss_demux_restart_tasks (GstMssDemux * mssdemux)
|
|
{
|
|
GSList *iter;
|
|
for (iter = mssdemux->streams; iter; iter = g_slist_next (iter)) {
|
|
GstMssDemuxStream *stream = iter->data;
|
|
gst_uri_downloader_reset (stream->downloader);
|
|
g_rec_mutex_unlock (&stream->download_lock);
|
|
}
|
|
g_rec_mutex_unlock (&mssdemux->stream_lock);
|
|
for (iter = mssdemux->streams; iter; iter = g_slist_next (iter)) {
|
|
GstMssDemuxStream *stream = iter->data;
|
|
|
|
gst_data_queue_set_flushing (stream->dataqueue, FALSE);
|
|
gst_task_start (stream->download_task);
|
|
}
|
|
gst_task_start (mssdemux->stream_task);
|
|
}
|
|
|
|
static gboolean
|
|
gst_mss_demux_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
|
|
{
|
|
GstMssDemux *mssdemux;
|
|
|
|
mssdemux = GST_MSS_DEMUX_CAST (parent);
|
|
|
|
switch (event->type) {
|
|
case GST_EVENT_SEEK:
|
|
{
|
|
gdouble rate;
|
|
GstFormat format;
|
|
GstSeekFlags flags;
|
|
GstSeekType start_type, stop_type;
|
|
gint64 start, stop;
|
|
GstEvent *newsegment;
|
|
GSList *iter;
|
|
gboolean update;
|
|
|
|
GST_INFO_OBJECT (mssdemux, "Received GST_EVENT_SEEK");
|
|
|
|
gst_event_parse_seek (event, &rate, &format, &flags, &start_type, &start,
|
|
&stop_type, &stop);
|
|
|
|
if (format != GST_FORMAT_TIME)
|
|
goto not_supported;
|
|
|
|
GST_DEBUG_OBJECT (mssdemux,
|
|
"seek event, rate: %f start: %" GST_TIME_FORMAT " stop: %"
|
|
GST_TIME_FORMAT, rate, GST_TIME_ARGS (start), GST_TIME_ARGS (stop));
|
|
|
|
if (flags & GST_SEEK_FLAG_FLUSH) {
|
|
GstEvent *flush = gst_event_new_flush_start ();
|
|
GST_DEBUG_OBJECT (mssdemux, "sending flush start");
|
|
|
|
gst_event_set_seqnum (flush, gst_event_get_seqnum (event));
|
|
gst_mss_demux_push_src_event (mssdemux, flush);
|
|
}
|
|
|
|
gst_mss_demux_stop_tasks (mssdemux, TRUE);
|
|
|
|
if (!gst_mss_manifest_seek (mssdemux->manifest, start)) {;
|
|
GST_WARNING_OBJECT (mssdemux, "Could not find seeked fragment");
|
|
goto not_supported;
|
|
}
|
|
|
|
gst_segment_do_seek (&mssdemux->segment, rate, format, flags,
|
|
start_type, start, stop_type, stop, &update);
|
|
|
|
newsegment = gst_event_new_segment (&mssdemux->segment);
|
|
gst_event_set_seqnum (newsegment, gst_event_get_seqnum (event));
|
|
for (iter = mssdemux->streams; iter; iter = g_slist_next (iter)) {
|
|
GstMssDemuxStream *stream = iter->data;
|
|
|
|
stream->eos = FALSE;
|
|
gst_data_queue_flush (stream->dataqueue);
|
|
gst_event_replace (&stream->pending_newsegment, newsegment);
|
|
}
|
|
gst_event_unref (newsegment);
|
|
|
|
if (flags & GST_SEEK_FLAG_FLUSH) {
|
|
GstEvent *flush = gst_event_new_flush_stop (TRUE);
|
|
GST_DEBUG_OBJECT (mssdemux, "sending flush stop");
|
|
|
|
gst_event_set_seqnum (flush, gst_event_get_seqnum (event));
|
|
gst_mss_demux_push_src_event (mssdemux, flush);
|
|
}
|
|
|
|
gst_mss_demux_restart_tasks (mssdemux);
|
|
|
|
gst_event_unref (event);
|
|
return TRUE;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return gst_pad_event_default (pad, parent, event);
|
|
|
|
not_supported:
|
|
gst_event_unref (event);
|
|
return FALSE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_mss_demux_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
|
|
{
|
|
GstMssDemux *mssdemux;
|
|
gboolean ret = FALSE;
|
|
|
|
if (query == NULL)
|
|
return FALSE;
|
|
|
|
mssdemux = GST_MSS_DEMUX (parent);
|
|
|
|
switch (query->type) {
|
|
case GST_QUERY_DURATION:{
|
|
GstClockTime duration = -1;
|
|
GstFormat fmt;
|
|
|
|
gst_query_parse_duration (query, &fmt, NULL);
|
|
if (fmt == GST_FORMAT_TIME && mssdemux->manifest) {
|
|
/* TODO should we use the streams accumulated duration or the main manifest duration? */
|
|
duration = gst_mss_manifest_get_gst_duration (mssdemux->manifest);
|
|
|
|
if (GST_CLOCK_TIME_IS_VALID (duration) && duration > 0) {
|
|
gst_query_set_duration (query, GST_FORMAT_TIME, duration);
|
|
ret = TRUE;
|
|
}
|
|
}
|
|
GST_INFO_OBJECT (mssdemux, "GST_QUERY_DURATION returns %s with duration %"
|
|
GST_TIME_FORMAT, ret ? "TRUE" : "FALSE", GST_TIME_ARGS (duration));
|
|
break;
|
|
}
|
|
case GST_QUERY_LATENCY:{
|
|
gboolean live = FALSE;
|
|
|
|
live = mssdemux->manifest
|
|
&& gst_mss_manifest_is_live (mssdemux->manifest);
|
|
|
|
gst_query_set_latency (query, live, 0, -1);
|
|
ret = TRUE;
|
|
break;
|
|
}
|
|
case GST_QUERY_SEEKING:{
|
|
GstFormat fmt;
|
|
gint64 stop = -1;
|
|
|
|
if (mssdemux->manifest && gst_mss_manifest_is_live (mssdemux->manifest)) {
|
|
return FALSE; /* no live seeking */
|
|
}
|
|
|
|
gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL);
|
|
GST_INFO_OBJECT (mssdemux, "Received GST_QUERY_SEEKING with format %d",
|
|
fmt);
|
|
if (fmt == GST_FORMAT_TIME) {
|
|
GstClockTime duration;
|
|
duration = gst_mss_manifest_get_gst_duration (mssdemux->manifest);
|
|
if (GST_CLOCK_TIME_IS_VALID (duration) && duration > 0)
|
|
stop = duration;
|
|
gst_query_set_seeking (query, fmt, TRUE, 0, stop);
|
|
ret = TRUE;
|
|
GST_INFO_OBJECT (mssdemux, "GST_QUERY_SEEKING returning with stop : %"
|
|
GST_TIME_FORMAT, GST_TIME_ARGS (stop));
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
/* Don't fordward 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;
|
|
}
|
|
|
|
static void
|
|
_set_src_pad_functions (GstPad * pad)
|
|
{
|
|
gst_pad_set_query_function (pad, GST_DEBUG_FUNCPTR (gst_mss_demux_src_query));
|
|
gst_pad_set_event_function (pad, GST_DEBUG_FUNCPTR (gst_mss_demux_src_event));
|
|
}
|
|
|
|
static GstPad *
|
|
_create_pad (GstMssDemux * mssdemux, GstMssStream * manifeststream)
|
|
{
|
|
gchar *name;
|
|
GstPad *srcpad = NULL;
|
|
GstMssStreamType streamtype;
|
|
|
|
streamtype = gst_mss_stream_get_type (manifeststream);
|
|
GST_DEBUG_OBJECT (mssdemux, "Found stream of type: %s",
|
|
gst_mss_stream_type_name (streamtype));
|
|
|
|
/* TODO use stream's name/bitrate/index as the pad name? */
|
|
if (streamtype == MSS_STREAM_TYPE_VIDEO) {
|
|
name = g_strdup_printf ("video_%02u", mssdemux->n_videos++);
|
|
srcpad =
|
|
gst_pad_new_from_static_template (&gst_mss_demux_videosrc_template,
|
|
name);
|
|
g_free (name);
|
|
} else if (streamtype == MSS_STREAM_TYPE_AUDIO) {
|
|
name = g_strdup_printf ("audio_%02u", mssdemux->n_audios++);
|
|
srcpad =
|
|
gst_pad_new_from_static_template (&gst_mss_demux_audiosrc_template,
|
|
name);
|
|
g_free (name);
|
|
}
|
|
|
|
if (!srcpad) {
|
|
GST_WARNING_OBJECT (mssdemux, "Ignoring unknown type stream");
|
|
return NULL;
|
|
}
|
|
|
|
_set_src_pad_functions (srcpad);
|
|
return srcpad;
|
|
}
|
|
|
|
static void
|
|
gst_mss_demux_create_streams (GstMssDemux * mssdemux)
|
|
{
|
|
GSList *streams = gst_mss_manifest_get_streams (mssdemux->manifest);
|
|
GSList *iter;
|
|
|
|
if (streams == NULL) {
|
|
GST_INFO_OBJECT (mssdemux, "No streams found in the manifest");
|
|
GST_ELEMENT_ERROR (mssdemux, STREAM, DEMUX,
|
|
(_("This file contains no playable streams.")),
|
|
("no streams found at the Manifest"));
|
|
return;
|
|
}
|
|
|
|
for (iter = streams; iter; iter = g_slist_next (iter)) {
|
|
GstPad *srcpad = NULL;
|
|
GstMssDemuxStream *stream = NULL;
|
|
GstMssStream *manifeststream = iter->data;
|
|
|
|
srcpad = _create_pad (mssdemux, manifeststream);
|
|
|
|
if (!srcpad) {
|
|
continue;
|
|
}
|
|
|
|
stream = gst_mss_demux_stream_new (mssdemux, manifeststream, srcpad);
|
|
gst_mss_stream_set_active (manifeststream, TRUE);
|
|
mssdemux->streams = g_slist_append (mssdemux->streams, stream);
|
|
}
|
|
|
|
/* select initial bitrates */
|
|
GST_OBJECT_LOCK (mssdemux);
|
|
GST_INFO_OBJECT (mssdemux, "Changing max bitrate to %" G_GUINT64_FORMAT,
|
|
mssdemux->connection_speed);
|
|
gst_mss_manifest_change_bitrate (mssdemux->manifest,
|
|
mssdemux->connection_speed);
|
|
mssdemux->update_bitrates = FALSE;
|
|
GST_OBJECT_UNLOCK (mssdemux);
|
|
}
|
|
|
|
static GstCaps *
|
|
create_mss_caps (GstMssDemuxStream * stream, GstCaps * caps)
|
|
{
|
|
return gst_caps_new_simple ("video/quicktime", "variant", G_TYPE_STRING,
|
|
"mss-fragmented", "timescale", G_TYPE_UINT64,
|
|
gst_mss_stream_get_timescale (stream->manifest_stream), "media-caps",
|
|
GST_TYPE_CAPS, caps, NULL);
|
|
}
|
|
|
|
static gboolean
|
|
gst_mss_demux_expose_stream (GstMssDemux * mssdemux, GstMssDemuxStream * stream)
|
|
{
|
|
GstCaps *caps;
|
|
GstCaps *media_caps;
|
|
GstPad *pad = stream->pad;
|
|
|
|
media_caps = gst_mss_stream_get_caps (stream->manifest_stream);
|
|
|
|
if (media_caps) {
|
|
gchar *name = gst_pad_get_name (pad);
|
|
GstEvent *event;
|
|
gchar *stream_id;
|
|
gst_pad_set_active (pad, TRUE);
|
|
|
|
caps = create_mss_caps (stream, media_caps);
|
|
gst_caps_unref (media_caps);
|
|
|
|
stream_id =
|
|
gst_pad_create_stream_id (pad, GST_ELEMENT_CAST (mssdemux), name);
|
|
|
|
event =
|
|
gst_pad_get_sticky_event (mssdemux->sinkpad, GST_EVENT_STREAM_START, 0);
|
|
if (event) {
|
|
if (gst_event_parse_group_id (event, &mssdemux->group_id))
|
|
mssdemux->have_group_id = TRUE;
|
|
else
|
|
mssdemux->have_group_id = FALSE;
|
|
gst_event_unref (event);
|
|
} else if (!mssdemux->have_group_id) {
|
|
mssdemux->have_group_id = TRUE;
|
|
mssdemux->group_id = gst_util_group_id_next ();
|
|
}
|
|
event = gst_event_new_stream_start (stream_id);
|
|
if (mssdemux->have_group_id)
|
|
gst_event_set_group_id (event, mssdemux->group_id);
|
|
|
|
gst_pad_push_event (pad, event);
|
|
g_free (stream_id);
|
|
g_free (name);
|
|
|
|
gst_pad_set_caps (pad, caps);
|
|
stream->caps = caps;
|
|
|
|
GST_INFO_OBJECT (mssdemux, "Adding srcpad %s:%s with caps %" GST_PTR_FORMAT,
|
|
GST_DEBUG_PAD_NAME (pad), caps);
|
|
gst_object_ref (pad);
|
|
|
|
stream->pending_newsegment = gst_event_new_segment (&mssdemux->segment);
|
|
gst_element_add_pad (GST_ELEMENT_CAST (mssdemux), pad);
|
|
} else {
|
|
GST_WARNING_OBJECT (mssdemux,
|
|
"Couldn't get caps from manifest stream %p %s, not exposing it", stream,
|
|
GST_PAD_NAME (stream->pad));
|
|
return FALSE;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_mss_demux_process_manifest (GstMssDemux * mssdemux)
|
|
{
|
|
GstQuery *query;
|
|
gchar *uri = NULL;
|
|
gboolean ret;
|
|
GSList *iter;
|
|
|
|
g_return_val_if_fail (mssdemux->manifest_buffer != NULL, FALSE);
|
|
g_return_val_if_fail (mssdemux->manifest == NULL, FALSE);
|
|
|
|
query = gst_query_new_uri ();
|
|
ret = gst_pad_peer_query (mssdemux->sinkpad, query);
|
|
if (ret) {
|
|
gchar *baseurl_end;
|
|
gst_query_parse_uri (query, &uri);
|
|
GST_INFO_OBJECT (mssdemux, "Upstream is using URI: %s", uri);
|
|
|
|
mssdemux->manifest_uri = g_strdup (uri);
|
|
baseurl_end = g_strrstr (uri, "/Manifest");
|
|
if (baseurl_end == NULL) {
|
|
/* second try */
|
|
baseurl_end = g_strrstr (uri, "/manifest");
|
|
}
|
|
|
|
if (baseurl_end) {
|
|
/* set the new end of the string */
|
|
baseurl_end[0] = '\0';
|
|
} else {
|
|
GST_WARNING_OBJECT (mssdemux, "Stream's URI didn't end with /manifest");
|
|
}
|
|
|
|
mssdemux->base_url = uri;
|
|
}
|
|
gst_query_unref (query);
|
|
|
|
if (mssdemux->base_url == NULL) {
|
|
GST_ELEMENT_ERROR (mssdemux, RESOURCE, NOT_FOUND,
|
|
(_("Couldn't get the Manifest's URI")),
|
|
("need to get the manifest's URI from upstream elements"));
|
|
return FALSE;
|
|
}
|
|
|
|
GST_INFO_OBJECT (mssdemux, "Received manifest: %i bytes",
|
|
(gint) gst_buffer_get_size (mssdemux->manifest_buffer));
|
|
|
|
mssdemux->manifest = gst_mss_manifest_new (mssdemux->manifest_buffer);
|
|
if (!mssdemux->manifest) {
|
|
GST_ELEMENT_ERROR (mssdemux, STREAM, FORMAT, ("Bad manifest file"),
|
|
("Xml manifest file couldn't be parsed"));
|
|
return FALSE;
|
|
}
|
|
|
|
GST_INFO_OBJECT (mssdemux, "Live stream: %d",
|
|
gst_mss_manifest_is_live (mssdemux->manifest));
|
|
|
|
gst_mss_demux_create_streams (mssdemux);
|
|
for (iter = mssdemux->streams; iter;) {
|
|
GSList *current = iter;
|
|
GstMssDemuxStream *stream = iter->data;
|
|
iter = g_slist_next (iter); /* do it ourselves as we want it done in the beginning of the loop */
|
|
if (!gst_mss_demux_expose_stream (mssdemux, stream)) {
|
|
gst_mss_demux_stream_free (stream);
|
|
mssdemux->streams = g_slist_delete_link (mssdemux->streams, current);
|
|
}
|
|
}
|
|
|
|
if (!mssdemux->streams) {
|
|
/* no streams */
|
|
GST_WARNING_OBJECT (mssdemux, "Couldn't identify the caps for any of the "
|
|
"streams found in the manifest");
|
|
GST_ELEMENT_ERROR (mssdemux, STREAM, DEMUX,
|
|
(_("This file contains no playable streams.")),
|
|
("No known stream formats found at the Manifest"));
|
|
return FALSE;
|
|
}
|
|
|
|
gst_element_no_more_pads (GST_ELEMENT_CAST (mssdemux));
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
gst_mss_demux_reload_manifest (GstMssDemux * mssdemux)
|
|
{
|
|
GstUriDownloader *downloader;
|
|
GstFragment *manifest_data;
|
|
GstBuffer *manifest_buffer;
|
|
|
|
downloader = gst_uri_downloader_new ();
|
|
|
|
manifest_data =
|
|
gst_uri_downloader_fetch_uri (downloader, mssdemux->manifest_uri);
|
|
manifest_buffer = gst_fragment_get_buffer (manifest_data);
|
|
g_object_unref (manifest_data);
|
|
|
|
gst_mss_manifest_reload_fragments (mssdemux->manifest, manifest_buffer);
|
|
gst_buffer_replace (&mssdemux->manifest_buffer, manifest_buffer);
|
|
gst_buffer_unref (manifest_buffer);
|
|
|
|
g_object_unref (downloader);
|
|
}
|
|
|
|
static void
|
|
gst_mss_demux_reconfigure_stream (GstMssDemuxStream * stream)
|
|
{
|
|
GstMssDemux *mssdemux = stream->parent;
|
|
guint64 new_bitrate;
|
|
|
|
new_bitrate =
|
|
mssdemux->bitrate_limit *
|
|
gst_download_rate_get_current_rate (&stream->download_rate);
|
|
if (mssdemux->connection_speed) {
|
|
new_bitrate = MIN (mssdemux->connection_speed, new_bitrate);
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (mssdemux,
|
|
"Current stream %s download bitrate %" G_GUINT64_FORMAT,
|
|
GST_PAD_NAME (stream->pad), new_bitrate);
|
|
|
|
if (gst_mss_stream_select_bitrate (stream->manifest_stream, new_bitrate)) {
|
|
GstEvent *capsevent;
|
|
GstCaps *caps;
|
|
caps = gst_mss_stream_get_caps (stream->manifest_stream);
|
|
|
|
if (stream->caps)
|
|
gst_caps_unref (stream->caps);
|
|
stream->caps = create_mss_caps (stream, caps);
|
|
gst_caps_unref (caps);
|
|
|
|
GST_DEBUG_OBJECT (mssdemux,
|
|
"Stream %s changed bitrate to %" G_GUINT64_FORMAT " caps: %"
|
|
GST_PTR_FORMAT, GST_PAD_NAME (stream->pad),
|
|
gst_mss_stream_get_current_bitrate (stream->manifest_stream), caps);
|
|
|
|
capsevent = gst_event_new_caps (stream->caps);
|
|
gst_mss_demux_stream_store_object (stream,
|
|
GST_MINI_OBJECT_CAST (capsevent));
|
|
}
|
|
}
|
|
|
|
static void
|
|
_free_data_queue_item (gpointer obj)
|
|
{
|
|
GstDataQueueItem *item = obj;
|
|
|
|
gst_mini_object_unref (item->object);
|
|
g_slice_free (GstDataQueueItem, item);
|
|
}
|
|
|
|
static void
|
|
gst_mss_demux_stream_store_object (GstMssDemuxStream * stream,
|
|
GstMiniObject * obj)
|
|
{
|
|
GstDataQueueItem *item;
|
|
gboolean ret = FALSE;
|
|
|
|
item = g_slice_new (GstDataQueueItem);
|
|
item->object = (GstMiniObject *) obj;
|
|
|
|
item->duration = 0; /* we don't care */
|
|
item->size = 0;
|
|
item->visible = TRUE;
|
|
|
|
item->destroy = (GDestroyNotify) _free_data_queue_item;
|
|
|
|
if (G_LIKELY (GST_IS_BUFFER (obj))) {
|
|
ret = gst_data_queue_push (stream->dataqueue, item);
|
|
} else {
|
|
ret = gst_data_queue_push_force (stream->dataqueue, item);
|
|
}
|
|
|
|
if (!ret) {
|
|
GST_DEBUG_OBJECT (stream->parent, "Failed to store object %p", obj);
|
|
item->destroy (item);
|
|
}
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_mss_demux_stream_download_fragment (GstMssDemuxStream * stream,
|
|
gboolean * buffer_downloaded)
|
|
{
|
|
GstMssDemux *mssdemux = stream->parent;
|
|
gchar *path;
|
|
gchar *url;
|
|
GstFragment *fragment;
|
|
GstBuffer *_buffer;
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
guint64 before_download, after_download;
|
|
|
|
before_download = g_get_real_time ();
|
|
|
|
GST_DEBUG_OBJECT (mssdemux, "Getting url for stream %p", stream);
|
|
ret = gst_mss_stream_get_fragment_url (stream->manifest_stream, &path);
|
|
switch (ret) {
|
|
case GST_FLOW_OK:
|
|
break; /* all is good, let's go */
|
|
case GST_FLOW_EOS:
|
|
if (gst_mss_manifest_is_live (mssdemux->manifest)) {
|
|
gst_mss_demux_reload_manifest (mssdemux);
|
|
return GST_FLOW_OK;
|
|
}
|
|
return GST_FLOW_EOS;
|
|
case GST_FLOW_ERROR:
|
|
goto error;
|
|
default:
|
|
break;
|
|
}
|
|
if (!path) {
|
|
goto no_url_error;
|
|
}
|
|
GST_DEBUG_OBJECT (mssdemux, "Got url path '%s' for stream %p", path, stream);
|
|
|
|
url = g_strdup_printf ("%s/%s", mssdemux->base_url, path);
|
|
|
|
GST_DEBUG_OBJECT (mssdemux, "Got url '%s' for stream %p", url, stream);
|
|
|
|
fragment = gst_uri_downloader_fetch_uri (stream->downloader, url);
|
|
g_free (path);
|
|
g_free (url);
|
|
|
|
if (!fragment) {
|
|
GST_INFO_OBJECT (mssdemux, "No fragment downloaded");
|
|
/* TODO check if we are truly stoping */
|
|
if (gst_mss_manifest_is_live (mssdemux->manifest)) {
|
|
/* 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 */
|
|
return GST_FLOW_OK;
|
|
}
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
|
|
_buffer = gst_fragment_get_buffer (fragment);
|
|
_buffer = gst_buffer_make_writable (_buffer);
|
|
GST_BUFFER_TIMESTAMP (_buffer) =
|
|
gst_mss_stream_get_fragment_gst_timestamp (stream->manifest_stream);
|
|
GST_BUFFER_DURATION (_buffer) =
|
|
gst_mss_stream_get_fragment_gst_duration (stream->manifest_stream);
|
|
|
|
g_object_unref (fragment);
|
|
|
|
if (buffer_downloaded)
|
|
*buffer_downloaded = _buffer != NULL;
|
|
|
|
after_download = g_get_real_time ();
|
|
if (_buffer) {
|
|
#ifndef GST_DISABLE_GST_DEBUG
|
|
guint64 bitrate = (8 * gst_buffer_get_size (_buffer) * 1000000LLU) /
|
|
(after_download - before_download);
|
|
#endif
|
|
|
|
GST_DEBUG_OBJECT (mssdemux,
|
|
"Measured download bitrate: %s %" G_GUINT64_FORMAT " bps",
|
|
GST_PAD_NAME (stream->pad), bitrate);
|
|
gst_download_rate_add_rate (&stream->download_rate,
|
|
gst_buffer_get_size (_buffer),
|
|
1000 * (after_download - before_download));
|
|
|
|
GST_DEBUG_OBJECT (mssdemux,
|
|
"Storing buffer for stream %p - %s. Timestamp: %" GST_TIME_FORMAT
|
|
" Duration: %" GST_TIME_FORMAT,
|
|
stream, GST_PAD_NAME (stream->pad),
|
|
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (_buffer)),
|
|
GST_TIME_ARGS (GST_BUFFER_DURATION (_buffer)));
|
|
gst_mss_demux_stream_store_object (stream, GST_MINI_OBJECT_CAST (_buffer));
|
|
}
|
|
|
|
return ret;
|
|
|
|
no_url_error:
|
|
{
|
|
GST_ELEMENT_ERROR (mssdemux, STREAM, DEMUX,
|
|
(_("Failed to get fragment URL.")),
|
|
("An error happened when getting fragment URL"));
|
|
gst_task_pause (stream->download_task);
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
error:
|
|
{
|
|
GST_WARNING_OBJECT (mssdemux, "Error while pushing fragment");
|
|
gst_task_pause (stream->download_task);
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_mss_demux_download_loop (GstMssDemuxStream * stream)
|
|
{
|
|
GstMssDemux *mssdemux = stream->parent;
|
|
gboolean buffer_downloaded = FALSE;
|
|
GstFlowReturn ret;
|
|
|
|
GST_LOG_OBJECT (mssdemux, "download loop start %p", stream);
|
|
|
|
GST_OBJECT_LOCK (mssdemux);
|
|
GST_DEBUG_OBJECT (mssdemux,
|
|
"Starting streams reconfiguration due to bitrate changes");
|
|
gst_mss_demux_reconfigure_stream (stream);
|
|
GST_DEBUG_OBJECT (mssdemux, "Finished streams reconfiguration");
|
|
GST_OBJECT_UNLOCK (mssdemux);
|
|
|
|
ret = gst_mss_demux_stream_download_fragment (stream, &buffer_downloaded);
|
|
|
|
if (stream->cancelled)
|
|
goto cancelled;
|
|
|
|
switch (ret) {
|
|
case GST_FLOW_OK:
|
|
break; /* all is good, let's go */
|
|
case GST_FLOW_EOS:
|
|
goto eos;
|
|
case GST_FLOW_ERROR:
|
|
goto error;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
stream->download_error_count = 0;
|
|
|
|
if (buffer_downloaded) {
|
|
gst_mss_stream_advance_fragment (stream->manifest_stream);
|
|
}
|
|
|
|
GST_LOG_OBJECT (mssdemux, "download loop end %p", stream);
|
|
return;
|
|
|
|
eos:
|
|
{
|
|
GST_DEBUG_OBJECT (mssdemux, "Storing EOS for pad %s:%s",
|
|
GST_DEBUG_PAD_NAME (stream->pad));
|
|
gst_mss_demux_stream_store_object (stream,
|
|
GST_MINI_OBJECT_CAST (gst_event_new_eos ()));
|
|
gst_task_pause (stream->download_task);
|
|
return;
|
|
}
|
|
error:
|
|
{
|
|
GST_WARNING_OBJECT (mssdemux, "Error while pushing fragment");
|
|
if (++stream->download_error_count >= DOWNLOAD_RATE_MAX_HISTORY_LENGTH) {
|
|
GST_ELEMENT_ERROR (mssdemux, RESOURCE, NOT_FOUND,
|
|
(_("Couldn't download fragments")),
|
|
("fragment downloading has failed too much consecutive times"));
|
|
}
|
|
return;
|
|
}
|
|
cancelled:
|
|
{
|
|
GST_DEBUG_OBJECT (mssdemux, "Stream %p has been cancelled", stream);
|
|
gst_task_pause (stream->download_task);
|
|
return;
|
|
}
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_mss_demux_select_latest_stream (GstMssDemux * mssdemux,
|
|
GstMssDemuxStream ** stream)
|
|
{
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
GstMssDemuxStream *current = NULL;
|
|
GstClockTime cur_time = GST_CLOCK_TIME_NONE;
|
|
GSList *iter;
|
|
|
|
if (!mssdemux->streams)
|
|
return GST_FLOW_ERROR;
|
|
|
|
for (iter = mssdemux->streams; iter; iter = g_slist_next (iter)) {
|
|
GstClockTime time;
|
|
GstMssDemuxStream *other;
|
|
GstDataQueueItem *item;
|
|
|
|
other = iter->data;
|
|
if (other->eos) {
|
|
continue;
|
|
}
|
|
|
|
if (!gst_data_queue_peek (other->dataqueue, &item)) {
|
|
/* flushing */
|
|
return GST_FLOW_FLUSHING;
|
|
}
|
|
|
|
if (GST_IS_EVENT (item->object)) {
|
|
/* events have higher priority */
|
|
current = other;
|
|
break;
|
|
}
|
|
time = GST_BUFFER_TIMESTAMP (GST_BUFFER_CAST (item->object));
|
|
if (time < cur_time) {
|
|
cur_time = time;
|
|
current = other;
|
|
}
|
|
}
|
|
|
|
*stream = current;
|
|
if (current == NULL)
|
|
ret = GST_FLOW_EOS;
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
gst_mss_demux_stream_loop (GstMssDemux * mssdemux)
|
|
{
|
|
GstMssDemuxStream *stream = NULL;
|
|
GstFlowReturn ret;
|
|
GstMiniObject *object = NULL;
|
|
GstDataQueueItem *item = NULL;
|
|
|
|
GST_LOG_OBJECT (mssdemux, "Starting stream loop");
|
|
|
|
ret = gst_mss_demux_select_latest_stream (mssdemux, &stream);
|
|
|
|
if (stream)
|
|
GST_DEBUG_OBJECT (mssdemux,
|
|
"Stream loop selected %p stream of pad %s. %d - %s", stream,
|
|
GST_PAD_NAME (stream->pad), ret, gst_flow_get_name (ret));
|
|
else
|
|
GST_DEBUG_OBJECT (mssdemux, "No streams selected -> %d - %s", ret,
|
|
gst_flow_get_name (ret));
|
|
|
|
switch (ret) {
|
|
case GST_FLOW_OK:
|
|
break;
|
|
case GST_FLOW_ERROR:
|
|
goto error;
|
|
case GST_FLOW_EOS:
|
|
goto eos;
|
|
case GST_FLOW_FLUSHING:
|
|
GST_DEBUG_OBJECT (mssdemux, "Wrong state, stopping task");
|
|
goto stop;
|
|
default:
|
|
g_assert_not_reached ();
|
|
}
|
|
|
|
GST_LOG_OBJECT (mssdemux, "popping next item from queue for stream %p %s",
|
|
stream, GST_PAD_NAME (stream->pad));
|
|
if (gst_data_queue_pop (stream->dataqueue, &item)) {
|
|
if (item->object)
|
|
object = gst_mini_object_ref (item->object);
|
|
item->destroy (item);
|
|
} else {
|
|
GST_DEBUG_OBJECT (mssdemux,
|
|
"Failed to get object from dataqueue on stream %p %s", stream,
|
|
GST_PAD_NAME (stream->pad));
|
|
goto stop;
|
|
}
|
|
|
|
if (G_UNLIKELY (stream->pending_newsegment)) {
|
|
gst_pad_push_event (stream->pad, stream->pending_newsegment);
|
|
stream->pending_newsegment = NULL;
|
|
}
|
|
|
|
if (G_LIKELY (GST_IS_BUFFER (object))) {
|
|
if (GST_BUFFER_TIMESTAMP (object) != stream->next_timestamp) {
|
|
GST_DEBUG_OBJECT (mssdemux, "Marking buffer %p as discont buffer:%"
|
|
GST_TIME_FORMAT " != expected:%" GST_TIME_FORMAT, object,
|
|
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (object)),
|
|
GST_TIME_ARGS (stream->next_timestamp));
|
|
GST_BUFFER_FLAG_SET (object, GST_BUFFER_FLAG_DISCONT);
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (mssdemux,
|
|
"Pushing buffer %p %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT
|
|
" discont:%d on pad %s", object,
|
|
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (object)),
|
|
GST_TIME_ARGS (GST_BUFFER_DURATION (object)),
|
|
GST_BUFFER_FLAG_IS_SET (object, GST_BUFFER_FLAG_DISCONT),
|
|
GST_PAD_NAME (stream->pad));
|
|
|
|
stream->next_timestamp =
|
|
GST_BUFFER_TIMESTAMP (object) + GST_BUFFER_DURATION (object);
|
|
|
|
stream->have_data = TRUE;
|
|
ret = gst_pad_push (stream->pad, GST_BUFFER_CAST (object));
|
|
} else if (GST_IS_EVENT (object)) {
|
|
if (GST_EVENT_TYPE (object) == GST_EVENT_EOS) {
|
|
stream->eos = TRUE;
|
|
}
|
|
GST_DEBUG_OBJECT (mssdemux, "Pushing event %p on pad %s", object,
|
|
GST_PAD_NAME (stream->pad));
|
|
gst_pad_push_event (stream->pad, GST_EVENT_CAST (object));
|
|
} else {
|
|
g_return_if_reached ();
|
|
}
|
|
|
|
switch (ret) {
|
|
case GST_FLOW_EOS:
|
|
goto eos; /* EOS ? */
|
|
case GST_FLOW_ERROR:
|
|
goto error;
|
|
case GST_FLOW_NOT_LINKED:
|
|
break; /* TODO what to do here? pause the task or just keep pushing? */
|
|
case GST_FLOW_OK:
|
|
default:
|
|
break;
|
|
}
|
|
|
|
GST_LOG_OBJECT (mssdemux, "Stream loop end");
|
|
return;
|
|
|
|
eos:
|
|
{
|
|
GST_DEBUG_OBJECT (mssdemux, "EOS on all pads");
|
|
gst_task_pause (mssdemux->stream_task);
|
|
return;
|
|
}
|
|
error:
|
|
{
|
|
GST_WARNING_OBJECT (mssdemux, "Error while pushing fragment");
|
|
gst_task_pause (mssdemux->stream_task);
|
|
return;
|
|
}
|
|
stop:
|
|
{
|
|
GST_DEBUG_OBJECT (mssdemux, "Pausing streaming task");
|
|
gst_task_pause (mssdemux->stream_task);
|
|
return;
|
|
}
|
|
}
|