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Pass size=-1 as is if that is the case instead of subtracting the offset. Otherwise we have an invalid size passed for that buffer.
1436 lines
47 KiB
C
1436 lines
47 KiB
C
/*
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* DASH demux plugin for GStreamer
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*
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* gstdashdemux.c
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*
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* Copyright (C) 2012 Orange
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*
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* Authors:
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* David Corvoysier <david.corvoysier@orange.com>
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* Hamid Zakari <hamid.zakari@gmail.com>
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*
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* Copyright (C) 2013 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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* 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 2.1 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 (COPYING); 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-dashdemux
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*
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* DASH demuxer element.
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* <title>Example launch line</title>
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* |[
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* gst-launch-1.0 playbin uri="http://www-itec.uni-klu.ac.at/ftp/datasets/mmsys12/RedBullPlayStreets/redbull_4s/RedBullPlayStreets_4s_isoffmain_DIS_23009_1_v_2_1c2_2011_08_30.mpd"
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* ]|
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*/
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/* Implementation notes:
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*
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* The following section describes how dashdemux works internally.
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*
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* Introduction:
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*
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* dashdemux is a "fake" demux, as unlike traditional demux elements, it
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* doesn't split data streams contained in an enveloppe to expose them
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* to downstream decoding elements.
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*
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* Instead, it parses an XML file called a manifest to identify a set of
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* individual stream fragments it needs to fetch and expose to the actual
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* demux elements that will handle them (this behavior is sometimes
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* referred as the "demux after a demux" scenario).
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*
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* For a given section of content, several representations corresponding
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* to different bitrates may be available: dashdemux will select the most
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* appropriate representation based on local conditions (typically the
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* available bandwidth and the amount of buffering available, capped by
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* a maximum allowed bitrate).
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*
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* The representation selection algorithm can be configured using
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* specific properties: max bitrate, min/max buffering, bandwidth ratio.
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*
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*
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* General Design:
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*
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* dashdemux has a single sink pad that accepts the data corresponding
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* to the manifest, typically fetched from an HTTP or file source.
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*
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* dashdemux exposes the streams it recreates based on the fragments it
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* fetches through dedicated src pads corresponding to the caps of the
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* fragments container (ISOBMFF/MP4 or MPEG2TS).
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*
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* During playback, new representations will typically be exposed as a
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* new set of pads (see 'Switching between representations' below).
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*
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* Fragments downloading is performed using a dedicated task that fills
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* an internal queue. Another task is in charge of popping fragments
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* from the queue and pushing them downstream.
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*
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* Switching between representations:
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*
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* Decodebin supports scenarios allowing to seamlessly switch from one
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* stream to another inside the same "decoding chain".
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*
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* To achieve that, it combines the elements it autoplugged in chains
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* and groups, allowing only one decoding group to be active at a given
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* time for a given chain.
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*
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* A chain can signal decodebin that it is complete by sending a
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* no-more-pads event, but even after that new pads can be added to
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* create new subgroups, providing that a new no-more-pads event is sent.
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*
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* We take advantage of that to dynamically create a new decoding group
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* in order to select a different representation during playback.
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*
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* Typically, assuming that each fragment contains both audio and video,
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* the following tree would be created:
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*
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* chain "DASH Demux"
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* |_ group "Representation set 1"
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* | |_ chain "Qt Demux 0"
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* | |_ group "Stream 0"
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* | |_ chain "H264"
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* | |_ chain "AAC"
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* |_ group "Representation set 2"
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* |_ chain "Qt Demux 1"
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* |_ group "Stream 1"
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* |_ chain "H264"
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* |_ chain "AAC"
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*
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* Or, if audio and video are contained in separate fragments:
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*
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* chain "DASH Demux"
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* |_ group "Representation set 1"
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* | |_ chain "Qt Demux 0"
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* | | |_ group "Stream 0"
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* | | |_ chain "H264"
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* | |_ chain "Qt Demux 1"
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* | |_ group "Stream 1"
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* | |_ chain "AAC"
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* |_ group "Representation set 2"
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* |_ chain "Qt Demux 3"
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* | |_ group "Stream 2"
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* | |_ chain "H264"
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* |_ chain "Qt Demux 4"
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* |_ group "Stream 3"
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* |_ chain "AAC"
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*
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* In both cases, when switching from Set 1 to Set 2 an EOS is sent on
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* each end pad corresponding to Rep 0, triggering the "drain" state to
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* propagate upstream.
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* Once both EOS have been processed, the "Set 1" group is completely
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* drained, and decodebin2 will switch to the "Set 2" group.
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*
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* Note: nothing can be pushed to the new decoding group before the
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* old one has been drained, which means that in order to be able to
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* adapt quickly to bandwidth changes, we will not be able to rely
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* on downstream buffering, and will instead manage an internal queue.
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*
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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 <string.h>
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#include <inttypes.h>
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#include <gst/base/gsttypefindhelper.h>
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#include <gst/tag/tag.h>
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#include "gst/gst-i18n-plugin.h"
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#include "gstdashdemux.h"
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#include "gstdash_debug.h"
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static GstStaticPadTemplate gst_dash_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_dash_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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static GstStaticPadTemplate sinktemplate = 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/dash+xml"));
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GST_DEBUG_CATEGORY (gst_dash_demux_debug);
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#define GST_CAT_DEFAULT gst_dash_demux_debug
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enum
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{
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PROP_0,
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PROP_MAX_BUFFERING_TIME,
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PROP_BANDWIDTH_USAGE,
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PROP_MAX_BITRATE,
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PROP_LAST
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};
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/* Default values for properties */
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#define DEFAULT_MAX_BUFFERING_TIME 30 /* in seconds */
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#define DEFAULT_BANDWIDTH_USAGE 0.8 /* 0 to 1 */
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#define DEFAULT_MAX_BITRATE 24000000 /* in bit/s */
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/* GObject */
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static void gst_dash_demux_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_dash_demux_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static void gst_dash_demux_dispose (GObject * obj);
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/* GstAdaptiveDemux */
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static GstClockTime gst_dash_demux_get_duration (GstAdaptiveDemux * ademux);
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static gboolean gst_dash_demux_is_live (GstAdaptiveDemux * ademux);
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static void gst_dash_demux_reset (GstAdaptiveDemux * ademux);
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static gboolean gst_dash_demux_process_manifest (GstAdaptiveDemux * ademux,
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GstBuffer * buf);
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static gboolean gst_dash_demux_seek (GstAdaptiveDemux * demux, GstEvent * seek);
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static GstFlowReturn
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gst_dash_demux_stream_update_fragment_info (GstAdaptiveDemuxStream * stream);
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static GstFlowReturn gst_dash_demux_stream_seek (GstAdaptiveDemuxStream *
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stream, GstClockTime ts);
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static gboolean
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gst_dash_demux_stream_has_next_fragment (GstAdaptiveDemuxStream * stream);
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static GstFlowReturn
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gst_dash_demux_stream_advance_fragment (GstAdaptiveDemuxStream * stream);
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static gboolean
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gst_dash_demux_stream_advance_subfragment (GstAdaptiveDemuxStream * stream);
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static gboolean gst_dash_demux_stream_select_bitrate (GstAdaptiveDemuxStream *
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stream, guint64 bitrate);
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static gint64
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gst_dash_demux_get_manifest_update_interval (GstAdaptiveDemux * demux);
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static GstFlowReturn
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gst_dash_demux_update_manifest_data (GstAdaptiveDemux * demux, GstBuffer * buf);
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static gint64
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gst_dash_demux_stream_get_fragment_waiting_time (GstAdaptiveDemuxStream *
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stream);
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static void gst_dash_demux_advance_period (GstAdaptiveDemux * demux);
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static gboolean gst_dash_demux_has_next_period (GstAdaptiveDemux * demux);
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static GstFlowReturn gst_dash_demux_data_received (GstAdaptiveDemux * demux,
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GstAdaptiveDemuxStream * stream);
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static GstFlowReturn
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gst_dash_demux_stream_fragment_finished (GstAdaptiveDemux * demux,
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GstAdaptiveDemuxStream * stream);
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/* GstDashDemux */
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static gboolean gst_dash_demux_setup_all_streams (GstDashDemux * demux);
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static void gst_dash_demux_stream_free (GstAdaptiveDemuxStream * stream);
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static GstCaps *gst_dash_demux_get_input_caps (GstDashDemux * demux,
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GstActiveStream * stream);
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static GstPad *gst_dash_demux_create_pad (GstDashDemux * demux,
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GstActiveStream * stream);
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#define SIDX(s) (&(s)->sidx_parser.sidx)
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#define SIDX_ENTRY(s,i) (&(SIDX(s)->entries[(i)]))
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#define SIDX_CURRENT_ENTRY(s) SIDX_ENTRY(s, SIDX(s)->entry_index)
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#define gst_dash_demux_parent_class parent_class
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G_DEFINE_TYPE_WITH_CODE (GstDashDemux, gst_dash_demux, GST_TYPE_ADAPTIVE_DEMUX,
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GST_DEBUG_CATEGORY_INIT (gst_dash_demux_debug, "dashdemux", 0,
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"dashdemux element")
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);
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static void
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gst_dash_demux_dispose (GObject * obj)
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{
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GstDashDemux *demux = GST_DASH_DEMUX (obj);
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gst_dash_demux_reset (GST_ADAPTIVE_DEMUX_CAST (demux));
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if (demux->client) {
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gst_mpd_client_free (demux->client);
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demux->client = NULL;
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}
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g_mutex_clear (&demux->client_lock);
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G_OBJECT_CLASS (parent_class)->dispose (obj);
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}
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static gboolean
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gst_dash_demux_get_live_seek_range (GstAdaptiveDemux * demux, gint64 * start,
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gint64 * stop)
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{
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GstDashDemux *self = GST_DASH_DEMUX (demux);
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GDateTime *now = g_date_time_new_now_utc ();
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GDateTime *mstart =
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gst_date_time_to_g_date_time (self->client->
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mpd_node->availabilityStartTime);
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GTimeSpan stream_now;
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stream_now = g_date_time_difference (now, mstart);
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g_date_time_unref (now);
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g_date_time_unref (mstart);
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*stop = stream_now * GST_USECOND;
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*start = *stop - (self->client->mpd_node->timeShiftBufferDepth * GST_MSECOND);
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return TRUE;
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}
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static GstClockTime
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gst_dash_demux_get_presentation_offset (GstAdaptiveDemux * demux,
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GstAdaptiveDemuxStream * stream)
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{
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GstDashDemuxStream *dashstream = (GstDashDemuxStream *) stream;
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GstDashDemux *dashdemux = GST_DASH_DEMUX_CAST (demux);
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return gst_mpd_parser_get_stream_presentation_offset (dashdemux->client,
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dashstream->index);
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}
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static void
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gst_dash_demux_class_init (GstDashDemuxClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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GstAdaptiveDemuxClass *gstadaptivedemux_class;
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gobject_class = (GObjectClass *) klass;
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gstelement_class = (GstElementClass *) klass;
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gstadaptivedemux_class = (GstAdaptiveDemuxClass *) klass;
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gobject_class->set_property = gst_dash_demux_set_property;
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gobject_class->get_property = gst_dash_demux_get_property;
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gobject_class->dispose = gst_dash_demux_dispose;
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#ifndef GST_REMOVE_DEPRECATED
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g_object_class_install_property (gobject_class, PROP_MAX_BUFFERING_TIME,
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g_param_spec_uint ("max-buffering-time", "Maximum buffering time",
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"Maximum number of seconds of buffer accumulated during playback"
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"(deprecated)",
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2, G_MAXUINT, DEFAULT_MAX_BUFFERING_TIME,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | G_PARAM_DEPRECATED));
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g_object_class_install_property (gobject_class, PROP_BANDWIDTH_USAGE,
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g_param_spec_float ("bandwidth-usage",
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"Bandwidth usage [0..1]",
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"Percentage of the available bandwidth to use when "
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"selecting representations (deprecated)",
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0, 1, DEFAULT_BANDWIDTH_USAGE,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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#endif
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g_object_class_install_property (gobject_class, PROP_MAX_BITRATE,
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g_param_spec_uint ("max-bitrate", "Max bitrate",
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"Max of bitrate supported by target decoder",
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1000, G_MAXUINT, DEFAULT_MAX_BITRATE,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&gst_dash_demux_audiosrc_template));
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&gst_dash_demux_videosrc_template));
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&sinktemplate));
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gst_element_class_set_static_metadata (gstelement_class,
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"DASH Demuxer",
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"Codec/Demuxer/Adaptive",
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"Dynamic Adaptive Streaming over HTTP demuxer",
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"David Corvoysier <david.corvoysier@orange.com>\n\
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Hamid Zakari <hamid.zakari@gmail.com>\n\
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Gianluca Gennari <gennarone@gmail.com>");
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gstadaptivedemux_class->get_duration = gst_dash_demux_get_duration;
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gstadaptivedemux_class->is_live = gst_dash_demux_is_live;
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gstadaptivedemux_class->reset = gst_dash_demux_reset;
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gstadaptivedemux_class->seek = gst_dash_demux_seek;
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gstadaptivedemux_class->process_manifest = gst_dash_demux_process_manifest;
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gstadaptivedemux_class->update_manifest_data =
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gst_dash_demux_update_manifest_data;
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gstadaptivedemux_class->get_manifest_update_interval =
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gst_dash_demux_get_manifest_update_interval;
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gstadaptivedemux_class->has_next_period = gst_dash_demux_has_next_period;
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gstadaptivedemux_class->advance_period = gst_dash_demux_advance_period;
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gstadaptivedemux_class->stream_has_next_fragment =
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gst_dash_demux_stream_has_next_fragment;
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gstadaptivedemux_class->stream_advance_fragment =
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gst_dash_demux_stream_advance_fragment;
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gstadaptivedemux_class->stream_get_fragment_waiting_time =
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gst_dash_demux_stream_get_fragment_waiting_time;
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gstadaptivedemux_class->stream_seek = gst_dash_demux_stream_seek;
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gstadaptivedemux_class->stream_select_bitrate =
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gst_dash_demux_stream_select_bitrate;
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gstadaptivedemux_class->stream_update_fragment_info =
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gst_dash_demux_stream_update_fragment_info;
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gstadaptivedemux_class->stream_free = gst_dash_demux_stream_free;
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gstadaptivedemux_class->get_live_seek_range =
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gst_dash_demux_get_live_seek_range;
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gstadaptivedemux_class->get_presentation_offset =
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gst_dash_demux_get_presentation_offset;
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}
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static void
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gst_dash_demux_init (GstDashDemux * demux)
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{
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/* Properties */
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demux->max_buffering_time = DEFAULT_MAX_BUFFERING_TIME * GST_SECOND;
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demux->max_bitrate = DEFAULT_MAX_BITRATE;
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g_mutex_init (&demux->client_lock);
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gst_adaptive_demux_set_stream_struct_size (GST_ADAPTIVE_DEMUX_CAST (demux),
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sizeof (GstDashDemuxStream));
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}
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static void
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gst_dash_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 *adaptivedemux = GST_ADAPTIVE_DEMUX_CAST (object);
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GstDashDemux *demux = GST_DASH_DEMUX (object);
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switch (prop_id) {
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case PROP_MAX_BUFFERING_TIME:
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demux->max_buffering_time = g_value_get_uint (value) * GST_SECOND;
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break;
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case PROP_BANDWIDTH_USAGE:
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adaptivedemux->bitrate_limit = g_value_get_float (value);
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break;
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case PROP_MAX_BITRATE:
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demux->max_bitrate = g_value_get_uint (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_dash_demux_get_property (GObject * object, guint prop_id, GValue * value,
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GParamSpec * pspec)
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{
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GstAdaptiveDemux *adaptivedemux = GST_ADAPTIVE_DEMUX_CAST (object);
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GstDashDemux *demux = GST_DASH_DEMUX (object);
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switch (prop_id) {
|
|
case PROP_MAX_BUFFERING_TIME:
|
|
g_value_set_uint (value, demux->max_buffering_time / GST_SECOND);
|
|
break;
|
|
case PROP_BANDWIDTH_USAGE:
|
|
g_value_set_float (value, adaptivedemux->bitrate_limit);
|
|
break;
|
|
case PROP_MAX_BITRATE:
|
|
g_value_set_uint (value, demux->max_bitrate);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_dash_demux_setup_mpdparser_streams (GstDashDemux * demux,
|
|
GstMpdClient * client)
|
|
{
|
|
gboolean has_streams = FALSE;
|
|
GList *adapt_sets, *iter;
|
|
|
|
adapt_sets = gst_mpd_client_get_adaptation_sets (client);
|
|
for (iter = adapt_sets; iter; iter = g_list_next (iter)) {
|
|
GstAdaptationSetNode *adapt_set_node = iter->data;
|
|
|
|
gst_mpd_client_setup_streaming (client, adapt_set_node);
|
|
has_streams = TRUE;
|
|
}
|
|
|
|
if (!has_streams) {
|
|
GST_ELEMENT_ERROR (demux, STREAM, DEMUX, ("Manifest has no playable "
|
|
"streams"), ("No streams could be activated from the manifest"));
|
|
}
|
|
return has_streams;
|
|
}
|
|
|
|
static gboolean
|
|
gst_dash_demux_setup_all_streams (GstDashDemux * demux)
|
|
{
|
|
guint i;
|
|
|
|
GST_DEBUG_OBJECT (demux, "Setting up streams for period %d",
|
|
gst_mpd_client_get_period_index (demux->client));
|
|
|
|
/* clean old active stream list, if any */
|
|
gst_active_streams_free (demux->client);
|
|
|
|
if (!gst_dash_demux_setup_mpdparser_streams (demux, demux->client)) {
|
|
return FALSE;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (demux, "Creating stream objects");
|
|
for (i = 0; i < gst_mpdparser_get_nb_active_stream (demux->client); i++) {
|
|
GstDashDemuxStream *stream;
|
|
GstActiveStream *active_stream;
|
|
GstCaps *caps;
|
|
GstPad *srcpad;
|
|
gchar *lang = NULL;
|
|
GstTagList *tags = NULL;
|
|
|
|
active_stream = gst_mpdparser_get_active_stream_by_index (demux->client, i);
|
|
if (active_stream == NULL)
|
|
continue;
|
|
/* TODO: support 'application' mimeType */
|
|
if (active_stream->mimeType == GST_STREAM_APPLICATION)
|
|
continue;
|
|
|
|
srcpad = gst_dash_demux_create_pad (demux, active_stream);
|
|
caps = gst_dash_demux_get_input_caps (demux, active_stream);
|
|
GST_LOG_OBJECT (demux, "Creating stream %d %" GST_PTR_FORMAT, i, caps);
|
|
|
|
if (active_stream->cur_adapt_set) {
|
|
GstAdaptationSetNode *adp_set = active_stream->cur_adapt_set;
|
|
lang = adp_set->lang;
|
|
|
|
/* Fallback to the language in ContentComponent node */
|
|
if (lang == NULL && g_list_length (adp_set->ContentComponents) == 1) {
|
|
GstContentComponentNode *cc_node = adp_set->ContentComponents->data;
|
|
lang = cc_node->lang;
|
|
}
|
|
}
|
|
|
|
if (lang) {
|
|
if (gst_tag_check_language_code (lang))
|
|
tags = gst_tag_list_new (GST_TAG_LANGUAGE_CODE, lang, NULL);
|
|
else
|
|
tags = gst_tag_list_new (GST_TAG_LANGUAGE_NAME, lang, NULL);
|
|
}
|
|
|
|
stream = (GstDashDemuxStream *)
|
|
gst_adaptive_demux_stream_new (GST_ADAPTIVE_DEMUX_CAST (demux), srcpad);
|
|
stream->active_stream = active_stream;
|
|
gst_adaptive_demux_stream_set_caps (GST_ADAPTIVE_DEMUX_STREAM_CAST (stream),
|
|
caps);
|
|
if (tags)
|
|
gst_adaptive_demux_stream_set_tags (GST_ADAPTIVE_DEMUX_STREAM_CAST
|
|
(stream), tags);
|
|
stream->index = i;
|
|
stream->pending_seek_ts = GST_CLOCK_TIME_NONE;
|
|
gst_isoff_sidx_parser_init (&stream->sidx_parser);
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static GstClockTime
|
|
gst_dash_demux_get_duration (GstAdaptiveDemux * ademux)
|
|
{
|
|
GstDashDemux *demux = GST_DASH_DEMUX_CAST (ademux);
|
|
|
|
g_return_val_if_fail (demux->client != NULL, GST_CLOCK_TIME_NONE);
|
|
|
|
return gst_mpd_client_get_media_presentation_duration (demux->client);
|
|
}
|
|
|
|
static gboolean
|
|
gst_dash_demux_is_live (GstAdaptiveDemux * ademux)
|
|
{
|
|
GstDashDemux *demux = GST_DASH_DEMUX_CAST (ademux);
|
|
|
|
g_return_val_if_fail (demux->client != NULL, FALSE);
|
|
|
|
return gst_mpd_client_is_live (demux->client);
|
|
}
|
|
|
|
static gboolean
|
|
gst_dash_demux_setup_streams (GstAdaptiveDemux * demux)
|
|
{
|
|
GstDashDemux *dashdemux = GST_DASH_DEMUX_CAST (demux);
|
|
gboolean ret = TRUE;
|
|
GstDateTime *now = NULL;
|
|
guint period_idx;
|
|
|
|
/* setup video, audio and subtitle streams, starting from first Period if
|
|
* non-live */
|
|
period_idx = 0;
|
|
if (gst_mpd_client_is_live (dashdemux->client)) {
|
|
|
|
/* get period index for period encompassing the current time */
|
|
now = gst_date_time_new_now_utc ();
|
|
if (dashdemux->client->mpd_node->suggestedPresentationDelay != -1) {
|
|
GstDateTime *target = gst_mpd_client_add_time_difference (now,
|
|
dashdemux->client->mpd_node->suggestedPresentationDelay * -1000);
|
|
gst_date_time_unref (now);
|
|
now = target;
|
|
}
|
|
period_idx =
|
|
gst_mpd_client_get_period_index_at_time (dashdemux->client, now);
|
|
if (period_idx == G_MAXUINT) {
|
|
#ifndef GST_DISABLE_GST_DEBUG
|
|
gchar *date_str = gst_date_time_to_iso8601_string (now);
|
|
GST_DEBUG_OBJECT (demux, "Unable to find live period active at %s",
|
|
date_str);
|
|
g_free (date_str);
|
|
#endif
|
|
ret = FALSE;
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
if (!gst_mpd_client_set_period_index (dashdemux->client, period_idx) ||
|
|
!gst_dash_demux_setup_all_streams (dashdemux)) {
|
|
ret = FALSE;
|
|
goto done;
|
|
}
|
|
|
|
/* If stream is live, try to find the segment that
|
|
* is closest to current time */
|
|
if (gst_mpd_client_is_live (dashdemux->client)) {
|
|
GDateTime *gnow;
|
|
|
|
GST_DEBUG_OBJECT (demux, "Seeking to current time of day for live stream ");
|
|
|
|
gnow = gst_date_time_to_g_date_time (now);
|
|
gst_mpd_client_seek_to_time (dashdemux->client, gnow);
|
|
g_date_time_unref (gnow);
|
|
} else {
|
|
GST_DEBUG_OBJECT (demux, "Seeking to first segment for on-demand stream ");
|
|
|
|
/* start playing from the first segment */
|
|
gst_mpd_client_seek_to_first_segment (dashdemux->client);
|
|
}
|
|
|
|
done:
|
|
if (now != NULL)
|
|
gst_date_time_unref (now);
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_dash_demux_process_manifest (GstAdaptiveDemux * demux, GstBuffer * buf)
|
|
{
|
|
GstAdaptiveDemuxClass *klass;
|
|
GstDashDemux *dashdemux = GST_DASH_DEMUX_CAST (demux);
|
|
gboolean ret = FALSE;
|
|
gchar *manifest;
|
|
GstMapInfo mapinfo;
|
|
|
|
if (dashdemux->client)
|
|
gst_mpd_client_free (dashdemux->client);
|
|
dashdemux->client = gst_mpd_client_new ();
|
|
|
|
dashdemux->client->mpd_uri = g_strdup (demux->manifest_uri);
|
|
dashdemux->client->mpd_base_uri = g_strdup (demux->manifest_base_uri);
|
|
|
|
GST_DEBUG_OBJECT (demux, "Fetched MPD file at URI: %s (base: %s)",
|
|
dashdemux->client->mpd_uri,
|
|
GST_STR_NULL (dashdemux->client->mpd_base_uri));
|
|
|
|
if (gst_buffer_map (buf, &mapinfo, GST_MAP_READ)) {
|
|
manifest = (gchar *) mapinfo.data;
|
|
if (gst_mpd_parse (dashdemux->client, manifest, mapinfo.size)) {
|
|
if (gst_mpd_client_has_isoff_ondemand_profile (dashdemux->client)) {
|
|
klass = GST_ADAPTIVE_DEMUX_GET_CLASS (dashdemux);
|
|
|
|
klass->data_received = gst_dash_demux_data_received;
|
|
klass->finish_fragment = gst_dash_demux_stream_fragment_finished;
|
|
}
|
|
|
|
if (gst_mpd_client_setup_media_presentation (dashdemux->client)) {
|
|
ret = TRUE;
|
|
} else {
|
|
GST_ELEMENT_ERROR (demux, STREAM, DECODE,
|
|
("Incompatible manifest file."), (NULL));
|
|
}
|
|
}
|
|
gst_buffer_unmap (buf, &mapinfo);
|
|
} else {
|
|
GST_WARNING_OBJECT (demux, "Failed to map manifest buffer");
|
|
}
|
|
|
|
if (ret)
|
|
ret = gst_dash_demux_setup_streams (demux);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static GstPad *
|
|
gst_dash_demux_create_pad (GstDashDemux * demux, GstActiveStream * stream)
|
|
{
|
|
GstPad *pad;
|
|
GstPadTemplate *tmpl;
|
|
gchar *name;
|
|
|
|
switch (stream->mimeType) {
|
|
case GST_STREAM_AUDIO:
|
|
name = g_strdup_printf ("audio_%02u", demux->n_audio_streams++);
|
|
tmpl = gst_static_pad_template_get (&gst_dash_demux_audiosrc_template);
|
|
break;
|
|
case GST_STREAM_VIDEO:
|
|
name = g_strdup_printf ("video_%02u", demux->n_video_streams++);
|
|
tmpl = gst_static_pad_template_get (&gst_dash_demux_videosrc_template);
|
|
break;
|
|
default:
|
|
g_assert_not_reached ();
|
|
return NULL;
|
|
}
|
|
|
|
/* Create and activate new pads */
|
|
pad = gst_ghost_pad_new_no_target_from_template (name, tmpl);
|
|
g_free (name);
|
|
gst_object_unref (tmpl);
|
|
|
|
gst_pad_set_active (pad, TRUE);
|
|
GST_INFO_OBJECT (demux, "Creating srcpad %s:%s", GST_DEBUG_PAD_NAME (pad));
|
|
return pad;
|
|
}
|
|
|
|
static void
|
|
gst_dash_demux_reset (GstAdaptiveDemux * ademux)
|
|
{
|
|
GstDashDemux *demux = GST_DASH_DEMUX_CAST (ademux);
|
|
|
|
GST_DEBUG_OBJECT (demux, "Resetting demux");
|
|
|
|
demux->end_of_period = FALSE;
|
|
demux->end_of_manifest = FALSE;
|
|
|
|
if (demux->client) {
|
|
gst_mpd_client_free (demux->client);
|
|
demux->client = NULL;
|
|
}
|
|
demux->client = gst_mpd_client_new ();
|
|
|
|
demux->n_audio_streams = 0;
|
|
demux->n_video_streams = 0;
|
|
}
|
|
|
|
static GstCaps *
|
|
gst_dash_demux_get_video_input_caps (GstDashDemux * demux,
|
|
GstActiveStream * stream)
|
|
{
|
|
guint width = 0, height = 0;
|
|
const gchar *mimeType = NULL;
|
|
GstCaps *caps = NULL;
|
|
|
|
if (stream == NULL)
|
|
return NULL;
|
|
|
|
/* if bitstreamSwitching is true we dont need to swich pads on resolution change */
|
|
if (!gst_mpd_client_get_bitstream_switching_flag (stream)) {
|
|
width = gst_mpd_client_get_video_stream_width (stream);
|
|
height = gst_mpd_client_get_video_stream_height (stream);
|
|
}
|
|
mimeType = gst_mpd_client_get_stream_mimeType (stream);
|
|
if (mimeType == NULL)
|
|
return NULL;
|
|
|
|
caps = gst_caps_from_string (mimeType);
|
|
if (width > 0 && height > 0) {
|
|
gst_caps_set_simple (caps, "width", G_TYPE_INT, width, "height",
|
|
G_TYPE_INT, height, NULL);
|
|
}
|
|
|
|
return caps;
|
|
}
|
|
|
|
static GstCaps *
|
|
gst_dash_demux_get_audio_input_caps (GstDashDemux * demux,
|
|
GstActiveStream * stream)
|
|
{
|
|
guint rate = 0, channels = 0;
|
|
const gchar *mimeType;
|
|
GstCaps *caps = NULL;
|
|
|
|
if (stream == NULL)
|
|
return NULL;
|
|
|
|
/* if bitstreamSwitching is true we dont need to swich pads on rate/channels change */
|
|
if (!gst_mpd_client_get_bitstream_switching_flag (stream)) {
|
|
channels = gst_mpd_client_get_audio_stream_num_channels (stream);
|
|
rate = gst_mpd_client_get_audio_stream_rate (stream);
|
|
}
|
|
mimeType = gst_mpd_client_get_stream_mimeType (stream);
|
|
if (mimeType == NULL)
|
|
return NULL;
|
|
|
|
caps = gst_caps_from_string (mimeType);
|
|
if (rate > 0) {
|
|
gst_caps_set_simple (caps, "rate", G_TYPE_INT, rate, NULL);
|
|
}
|
|
if (channels > 0) {
|
|
gst_caps_set_simple (caps, "channels", G_TYPE_INT, channels, NULL);
|
|
}
|
|
|
|
return caps;
|
|
}
|
|
|
|
static GstCaps *
|
|
gst_dash_demux_get_application_input_caps (GstDashDemux * demux,
|
|
GstActiveStream * stream)
|
|
{
|
|
const gchar *mimeType;
|
|
GstCaps *caps = NULL;
|
|
|
|
if (stream == NULL)
|
|
return NULL;
|
|
|
|
mimeType = gst_mpd_client_get_stream_mimeType (stream);
|
|
if (mimeType == NULL)
|
|
return NULL;
|
|
|
|
caps = gst_caps_from_string (mimeType);
|
|
|
|
return caps;
|
|
}
|
|
|
|
static GstCaps *
|
|
gst_dash_demux_get_input_caps (GstDashDemux * demux, GstActiveStream * stream)
|
|
{
|
|
switch (stream->mimeType) {
|
|
case GST_STREAM_VIDEO:
|
|
return gst_dash_demux_get_video_input_caps (demux, stream);
|
|
case GST_STREAM_AUDIO:
|
|
return gst_dash_demux_get_audio_input_caps (demux, stream);
|
|
case GST_STREAM_APPLICATION:
|
|
return gst_dash_demux_get_application_input_caps (demux, stream);
|
|
default:
|
|
return GST_CAPS_NONE;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_dash_demux_stream_update_headers_info (GstAdaptiveDemuxStream * stream)
|
|
{
|
|
GstDashDemuxStream *dashstream = (GstDashDemuxStream *) stream;
|
|
GstDashDemux *dashdemux = GST_DASH_DEMUX_CAST (stream->demux);
|
|
gchar *path = NULL;
|
|
|
|
gst_mpd_client_get_next_header (dashdemux->client,
|
|
&path, dashstream->index,
|
|
&stream->fragment.header_range_start, &stream->fragment.header_range_end);
|
|
|
|
if (path != NULL && strncmp (path, "http://", 7) != 0) {
|
|
stream->fragment.header_uri =
|
|
gst_uri_join_strings (gst_mpdparser_get_baseURL (dashdemux->client,
|
|
dashstream->index), path);
|
|
g_free (path);
|
|
} else {
|
|
stream->fragment.header_uri = path;
|
|
}
|
|
path = NULL;
|
|
|
|
gst_mpd_client_get_next_header_index (dashdemux->client,
|
|
&path, dashstream->index,
|
|
&stream->fragment.index_range_start, &stream->fragment.index_range_end);
|
|
|
|
if (path != NULL && strncmp (path, "http://", 7) != 0) {
|
|
stream->fragment.index_uri =
|
|
gst_uri_join_strings (gst_mpdparser_get_baseURL (dashdemux->client,
|
|
dashstream->index), path);
|
|
g_free (path);
|
|
} else {
|
|
stream->fragment.index_uri = path;
|
|
}
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_dash_demux_stream_update_fragment_info (GstAdaptiveDemuxStream * stream)
|
|
{
|
|
GstDashDemuxStream *dashstream = (GstDashDemuxStream *) stream;
|
|
GstDashDemux *dashdemux = GST_DASH_DEMUX_CAST (stream->demux);
|
|
GstClockTime ts;
|
|
GstMediaFragmentInfo fragment;
|
|
gboolean isombff;
|
|
|
|
gst_adaptive_demux_stream_fragment_clear (&stream->fragment);
|
|
|
|
isombff = gst_mpd_client_has_isoff_ondemand_profile (dashdemux->client);
|
|
|
|
if (GST_ADAPTIVE_DEMUX_STREAM_NEED_HEADER (stream) && isombff) {
|
|
gst_dash_demux_stream_update_headers_info (stream);
|
|
dashstream->sidx_base_offset = stream->fragment.index_range_end + 1;
|
|
if (dashstream->sidx_index != 0) {
|
|
/* request only the index to be downloaded as we need to reposition the
|
|
* stream to a subsegment */
|
|
return GST_FLOW_OK;
|
|
}
|
|
}
|
|
|
|
if (gst_mpd_client_get_next_fragment_timestamp (dashdemux->client,
|
|
dashstream->index, &ts)) {
|
|
if (GST_ADAPTIVE_DEMUX_STREAM_NEED_HEADER (stream)) {
|
|
gst_dash_demux_stream_update_headers_info (stream);
|
|
}
|
|
|
|
gst_mpd_client_get_next_fragment (dashdemux->client, dashstream->index,
|
|
&fragment);
|
|
|
|
stream->fragment.uri = fragment.uri;
|
|
if (isombff && dashstream->sidx_index != 0) {
|
|
GstSidxBoxEntry *entry = SIDX_CURRENT_ENTRY (dashstream);
|
|
stream->fragment.range_start =
|
|
dashstream->sidx_base_offset + entry->offset;
|
|
stream->fragment.timestamp = entry->pts;
|
|
stream->fragment.duration = entry->duration;
|
|
if (stream->demux->segment.rate < 0.0) {
|
|
stream->fragment.range_end =
|
|
stream->fragment.range_start + entry->size - 1;
|
|
} else {
|
|
stream->fragment.range_end = fragment.range_end;
|
|
}
|
|
} else {
|
|
stream->fragment.timestamp = fragment.timestamp;
|
|
stream->fragment.duration = fragment.duration;
|
|
stream->fragment.range_start =
|
|
MAX (fragment.range_start, dashstream->sidx_base_offset);
|
|
stream->fragment.range_end = fragment.range_end;
|
|
}
|
|
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
return GST_FLOW_EOS;
|
|
}
|
|
|
|
static void
|
|
gst_dash_demux_stream_sidx_seek (GstDashDemuxStream * dashstream,
|
|
GstClockTime ts)
|
|
{
|
|
GstSidxBox *sidx = SIDX (dashstream);
|
|
gint i;
|
|
|
|
/* TODO optimize to a binary search */
|
|
for (i = 0; i < sidx->entries_count; i++) {
|
|
if (sidx->entries[i].pts + sidx->entries[i].duration >= ts)
|
|
break;
|
|
}
|
|
sidx->entry_index = i;
|
|
dashstream->sidx_index = i;
|
|
if (i < sidx->entries_count)
|
|
dashstream->sidx_current_remaining = sidx->entries[i].size;
|
|
else
|
|
dashstream->sidx_current_remaining = 0;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_dash_demux_stream_seek (GstAdaptiveDemuxStream * stream, GstClockTime ts)
|
|
{
|
|
GstDashDemuxStream *dashstream = (GstDashDemuxStream *) stream;
|
|
GstDashDemux *dashdemux = GST_DASH_DEMUX_CAST (stream->demux);
|
|
|
|
if (gst_mpd_client_has_isoff_ondemand_profile (dashdemux->client)) {
|
|
if (dashstream->sidx_parser.status == GST_ISOFF_SIDX_PARSER_FINISHED) {
|
|
gst_dash_demux_stream_sidx_seek (dashstream, ts);
|
|
} else {
|
|
/* no index yet, seek when we have it */
|
|
dashstream->pending_seek_ts = ts;
|
|
}
|
|
}
|
|
|
|
gst_mpd_client_stream_seek (dashdemux->client, dashstream->active_stream, ts);
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
static gboolean
|
|
gst_dash_demux_stream_advance_subfragment (GstAdaptiveDemuxStream * stream)
|
|
{
|
|
GstDashDemuxStream *dashstream = (GstDashDemuxStream *) stream;
|
|
|
|
GstSidxBox *sidx = SIDX (dashstream);
|
|
gboolean fragment_finished = TRUE;
|
|
|
|
if (dashstream->sidx_parser.status == GST_ISOFF_SIDX_PARSER_FINISHED) {
|
|
if (stream->demux->segment.rate > 0.0) {
|
|
sidx->entry_index++;
|
|
if (sidx->entry_index < sidx->entries_count) {
|
|
fragment_finished = FALSE;
|
|
}
|
|
} else {
|
|
sidx->entry_index--;
|
|
if (sidx->entry_index >= 0) {
|
|
fragment_finished = FALSE;
|
|
}
|
|
}
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (stream->pad, "New sidx index: %d / %d. "
|
|
"Finished fragment: %d", sidx->entry_index, sidx->entries_count,
|
|
fragment_finished);
|
|
|
|
if (!fragment_finished) {
|
|
dashstream->sidx_current_remaining = sidx->entries[sidx->entry_index].size;
|
|
}
|
|
return !fragment_finished;
|
|
}
|
|
|
|
static gboolean
|
|
gst_dash_demux_stream_has_next_fragment (GstAdaptiveDemuxStream * stream)
|
|
{
|
|
GstDashDemux *dashdemux = GST_DASH_DEMUX_CAST (stream->demux);
|
|
GstDashDemuxStream *dashstream = (GstDashDemuxStream *) stream;
|
|
|
|
return gst_mpd_client_has_next_segment (dashdemux->client,
|
|
dashstream->active_stream, stream->demux->segment.rate > 0.0);
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_dash_demux_stream_advance_fragment (GstAdaptiveDemuxStream * stream)
|
|
{
|
|
GstDashDemuxStream *dashstream = (GstDashDemuxStream *) stream;
|
|
GstDashDemux *dashdemux = GST_DASH_DEMUX_CAST (stream->demux);
|
|
|
|
GST_DEBUG_OBJECT (stream->pad, "Advance fragment");
|
|
|
|
if (gst_mpd_client_has_isoff_ondemand_profile (dashdemux->client)) {
|
|
if (gst_dash_demux_stream_advance_subfragment (stream))
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
return gst_mpd_client_advance_segment (dashdemux->client,
|
|
dashstream->active_stream, stream->demux->segment.rate > 0.0);
|
|
}
|
|
|
|
static gboolean
|
|
gst_dash_demux_stream_select_bitrate (GstAdaptiveDemuxStream * stream,
|
|
guint64 bitrate)
|
|
{
|
|
GstActiveStream *active_stream = NULL;
|
|
GList *rep_list = NULL;
|
|
gint new_index;
|
|
GstDashDemux *demux = GST_DASH_DEMUX_CAST (stream->demux);
|
|
GstDashDemuxStream *dashstream = (GstDashDemuxStream *) stream;
|
|
gboolean ret = FALSE;
|
|
|
|
active_stream = dashstream->active_stream;
|
|
if (active_stream == NULL) {
|
|
goto end;
|
|
}
|
|
|
|
/* retrieve representation list */
|
|
if (active_stream->cur_adapt_set)
|
|
rep_list = active_stream->cur_adapt_set->Representations;
|
|
if (!rep_list) {
|
|
goto end;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (stream->pad,
|
|
"Trying to change to bitrate: %" G_GUINT64_FORMAT, bitrate);
|
|
|
|
/* get representation index with current max_bandwidth */
|
|
new_index = gst_mpdparser_get_rep_idx_with_max_bandwidth (rep_list, bitrate);
|
|
|
|
/* if no representation has the required bandwidth, take the lowest one */
|
|
if (new_index == -1)
|
|
new_index = gst_mpdparser_get_rep_idx_with_min_bandwidth (rep_list);
|
|
|
|
if (new_index != active_stream->representation_idx) {
|
|
GstRepresentationNode *rep = g_list_nth_data (rep_list, new_index);
|
|
GST_INFO_OBJECT (demux, "Changing representation idx: %d %d %u",
|
|
dashstream->index, new_index, rep->bandwidth);
|
|
if (gst_mpd_client_setup_representation (demux->client, active_stream, rep)) {
|
|
GstCaps *caps;
|
|
|
|
GST_INFO_OBJECT (demux, "Switching bitrate to %d",
|
|
active_stream->cur_representation->bandwidth);
|
|
caps = gst_dash_demux_get_input_caps (demux, active_stream);
|
|
gst_adaptive_demux_stream_set_caps (stream, caps);
|
|
ret = TRUE;
|
|
|
|
} else {
|
|
GST_WARNING_OBJECT (demux, "Can not switch representation, aborting...");
|
|
}
|
|
}
|
|
|
|
if (gst_mpd_client_has_isoff_ondemand_profile (demux->client)) {
|
|
|
|
/* store our current position to change to the same one in a different
|
|
* representation if needed */
|
|
dashstream->sidx_index = SIDX (dashstream)->entry_index;
|
|
if (ret) {
|
|
/* TODO cache indexes to avoid re-downloading and parsing */
|
|
/* if we switched, we need a new index */
|
|
gst_isoff_sidx_parser_clear (&dashstream->sidx_parser);
|
|
gst_isoff_sidx_parser_init (&dashstream->sidx_parser);
|
|
}
|
|
}
|
|
|
|
end:
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_dash_demux_seek (GstAdaptiveDemux * demux, GstEvent * seek)
|
|
{
|
|
gdouble rate;
|
|
GstFormat format;
|
|
GstSeekFlags flags;
|
|
GstSeekType start_type, stop_type;
|
|
gint64 start, stop;
|
|
GList *list;
|
|
GstClockTime current_pos, target_pos;
|
|
guint current_period;
|
|
GstStreamPeriod *period;
|
|
GList *iter;
|
|
GstDashDemux *dashdemux = GST_DASH_DEMUX_CAST (demux);
|
|
|
|
gst_event_parse_seek (seek, &rate, &format, &flags, &start_type, &start,
|
|
&stop_type, &stop);
|
|
|
|
/* TODO check if start-type/stop-type is SET */
|
|
if (demux->segment.rate > 0.0)
|
|
target_pos = (GstClockTime) demux->segment.start;
|
|
else
|
|
target_pos = (GstClockTime) demux->segment.stop;
|
|
|
|
/* select the requested Period in the Media Presentation */
|
|
current_period = 0;
|
|
for (list = g_list_first (dashdemux->client->periods); list;
|
|
list = g_list_next (list)) {
|
|
period = list->data;
|
|
current_pos = period->start;
|
|
current_period = period->number;
|
|
GST_DEBUG_OBJECT (demux, "Looking at period %u pos %" GST_TIME_FORMAT,
|
|
current_period, GST_TIME_ARGS (current_pos));
|
|
if (current_pos <= target_pos
|
|
&& target_pos < current_pos + period->duration) {
|
|
break;
|
|
}
|
|
}
|
|
if (list == NULL) {
|
|
GST_WARNING_OBJECT (demux, "Could not find seeked Period");
|
|
return FALSE;
|
|
}
|
|
if (current_period != gst_mpd_client_get_period_index (dashdemux->client)) {
|
|
GST_DEBUG_OBJECT (demux, "Seeking to Period %d", current_period);
|
|
|
|
/* clean old active stream list, if any */
|
|
gst_active_streams_free (dashdemux->client);
|
|
|
|
/* setup video, audio and subtitle streams, starting from the new Period */
|
|
if (!gst_mpd_client_set_period_index (dashdemux->client, current_period)
|
|
|| !gst_dash_demux_setup_all_streams (dashdemux))
|
|
return FALSE;
|
|
}
|
|
|
|
/* Update the current sequence on all streams */
|
|
for (iter = demux->streams; iter; iter = g_list_next (iter)) {
|
|
GstDashDemuxStream *dashstream = iter->data;
|
|
|
|
if (flags & GST_SEEK_FLAG_FLUSH) {
|
|
gst_isoff_sidx_parser_clear (&dashstream->sidx_parser);
|
|
gst_isoff_sidx_parser_init (&dashstream->sidx_parser);
|
|
}
|
|
gst_dash_demux_stream_seek (iter->data, target_pos);
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
static gint64
|
|
gst_dash_demux_get_manifest_update_interval (GstAdaptiveDemux * demux)
|
|
{
|
|
GstDashDemux *dashdemux = GST_DASH_DEMUX_CAST (demux);
|
|
return dashdemux->client->mpd_node->minimumUpdatePeriod * 1000;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_dash_demux_update_manifest_data (GstAdaptiveDemux * demux,
|
|
GstBuffer * buffer)
|
|
{
|
|
GstDashDemux *dashdemux = GST_DASH_DEMUX_CAST (demux);
|
|
GstMpdClient *new_client = NULL;
|
|
GstMapInfo mapinfo;
|
|
|
|
GST_DEBUG_OBJECT (demux, "Updating manifest file from URL");
|
|
|
|
/* parse the manifest file */
|
|
new_client = gst_mpd_client_new ();
|
|
new_client->mpd_uri = g_strdup (demux->manifest_uri);
|
|
new_client->mpd_base_uri = g_strdup (demux->manifest_base_uri);
|
|
gst_buffer_map (buffer, &mapinfo, GST_MAP_READ);
|
|
|
|
if (gst_mpd_parse (new_client, (gchar *) mapinfo.data, mapinfo.size)) {
|
|
const gchar *period_id;
|
|
guint period_idx;
|
|
GList *iter;
|
|
GList *streams_iter;
|
|
|
|
/* prepare the new manifest and try to transfer the stream position
|
|
* status from the old manifest client */
|
|
|
|
GST_DEBUG_OBJECT (demux, "Updating manifest");
|
|
|
|
period_id = gst_mpd_client_get_period_id (dashdemux->client);
|
|
period_idx = gst_mpd_client_get_period_index (dashdemux->client);
|
|
|
|
/* setup video, audio and subtitle streams, starting from current Period */
|
|
if (!gst_mpd_client_setup_media_presentation (new_client)) {
|
|
/* TODO */
|
|
}
|
|
|
|
if (period_id) {
|
|
if (!gst_mpd_client_set_period_id (new_client, period_id)) {
|
|
GST_DEBUG_OBJECT (demux, "Error setting up the updated manifest file");
|
|
return GST_FLOW_EOS;
|
|
}
|
|
} else {
|
|
if (!gst_mpd_client_set_period_index (new_client, period_idx)) {
|
|
GST_DEBUG_OBJECT (demux, "Error setting up the updated manifest file");
|
|
return GST_FLOW_EOS;
|
|
}
|
|
}
|
|
|
|
if (!gst_dash_demux_setup_mpdparser_streams (dashdemux, new_client)) {
|
|
GST_ERROR_OBJECT (demux, "Failed to setup streams on manifest " "update");
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
|
|
/* update the streams to play from the next segment */
|
|
for (iter = demux->streams, streams_iter = new_client->active_streams;
|
|
iter && streams_iter;
|
|
iter = g_list_next (iter), streams_iter = g_list_next (streams_iter)) {
|
|
GstDashDemuxStream *demux_stream = iter->data;
|
|
GstActiveStream *new_stream = streams_iter->data;
|
|
GstClockTime ts;
|
|
|
|
if (!new_stream) {
|
|
GST_DEBUG_OBJECT (demux,
|
|
"Stream of index %d is missing from manifest update",
|
|
demux_stream->index);
|
|
return GST_FLOW_EOS;
|
|
}
|
|
|
|
if (gst_mpd_client_get_next_fragment_timestamp (dashdemux->client,
|
|
demux_stream->index, &ts)
|
|
|| gst_mpd_client_get_last_fragment_timestamp_end (dashdemux->client,
|
|
demux_stream->index, &ts)) {
|
|
|
|
/* Due to rounding when doing the timescale conversions it might happen
|
|
* that the ts falls back to a previous segment, leading the same data
|
|
* to be downloaded twice. We try to work around this by always adding
|
|
* 10 microseconds to get back to the correct segment. The errors are
|
|
* usually on the order of nanoseconds so it should be enough.
|
|
*/
|
|
GST_DEBUG_OBJECT (GST_ADAPTIVE_DEMUX_STREAM_PAD (demux_stream),
|
|
"Current position: %" GST_TIME_FORMAT ", updating to %"
|
|
GST_TIME_FORMAT, GST_TIME_ARGS (ts),
|
|
GST_TIME_ARGS (ts + (10 * GST_USECOND)));
|
|
ts += 10 * GST_USECOND;
|
|
gst_mpd_client_stream_seek (new_client, new_stream, ts);
|
|
}
|
|
|
|
demux_stream->active_stream = new_stream;
|
|
}
|
|
|
|
gst_mpd_client_free (dashdemux->client);
|
|
dashdemux->client = new_client;
|
|
|
|
GST_DEBUG_OBJECT (demux, "Manifest file successfully updated");
|
|
} else {
|
|
/* 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_WARNING_OBJECT (demux, "Error parsing the manifest.");
|
|
gst_buffer_unmap (buffer, &mapinfo);
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
|
|
gst_buffer_unmap (buffer, &mapinfo);
|
|
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
static gint64
|
|
gst_dash_demux_stream_get_fragment_waiting_time (GstAdaptiveDemuxStream *
|
|
stream)
|
|
{
|
|
GstDashDemux *dashdemux = GST_DASH_DEMUX_CAST (stream->demux);
|
|
GstDashDemuxStream *dashstream = (GstDashDemuxStream *) stream;
|
|
GstDateTime *seg_end_time;
|
|
GstActiveStream *active_stream = dashstream->active_stream;
|
|
|
|
seg_end_time =
|
|
gst_mpd_client_get_next_segment_availability_end_time (dashdemux->client,
|
|
active_stream);
|
|
|
|
if (seg_end_time) {
|
|
gint64 diff;
|
|
GstDateTime *cur_time;
|
|
|
|
cur_time = gst_date_time_new_now_utc ();
|
|
diff = gst_mpd_client_calculate_time_difference (cur_time, seg_end_time);
|
|
gst_date_time_unref (seg_end_time);
|
|
gst_date_time_unref (cur_time);
|
|
return diff;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static gboolean
|
|
gst_dash_demux_has_next_period (GstAdaptiveDemux * demux)
|
|
{
|
|
GstDashDemux *dashdemux = GST_DASH_DEMUX_CAST (demux);
|
|
|
|
if (demux->segment.rate >= 0)
|
|
return gst_mpd_client_has_next_period (dashdemux->client);
|
|
else
|
|
return gst_mpd_client_has_previous_period (dashdemux->client);
|
|
}
|
|
|
|
static void
|
|
gst_dash_demux_advance_period (GstAdaptiveDemux * demux)
|
|
{
|
|
GstDashDemux *dashdemux = GST_DASH_DEMUX_CAST (demux);
|
|
|
|
g_return_if_fail (gst_mpd_client_has_next_period (dashdemux->client));
|
|
|
|
if (demux->segment.rate >= 0) {
|
|
if (!gst_mpd_client_set_period_index (dashdemux->client,
|
|
gst_mpd_client_get_period_index (dashdemux->client) + 1)) {
|
|
/* TODO error */
|
|
return;
|
|
}
|
|
} else {
|
|
if (!gst_mpd_client_set_period_index (dashdemux->client,
|
|
gst_mpd_client_get_period_index (dashdemux->client) - 1)) {
|
|
/* TODO error */
|
|
return;
|
|
}
|
|
}
|
|
|
|
gst_dash_demux_setup_all_streams (dashdemux);
|
|
gst_mpd_client_seek_to_first_segment (dashdemux->client);
|
|
}
|
|
|
|
static GstBuffer *
|
|
_gst_buffer_split (GstBuffer * buffer, gint offset, gsize size)
|
|
{
|
|
GstBuffer *newbuf = gst_buffer_copy_region (buffer,
|
|
GST_BUFFER_COPY_FLAGS | GST_BUFFER_COPY_TIMESTAMPS | GST_BUFFER_COPY_META
|
|
| GST_BUFFER_COPY_MEMORY, offset, size == -1 ? size : size - offset);
|
|
|
|
gst_buffer_resize (buffer, 0, offset);
|
|
|
|
return newbuf;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_dash_demux_stream_fragment_finished (GstAdaptiveDemux * demux,
|
|
GstAdaptiveDemuxStream * stream)
|
|
{
|
|
GstDashDemux *dashdemux = GST_DASH_DEMUX_CAST (demux);
|
|
GstDashDemuxStream *dashstream = (GstDashDemuxStream *) stream;
|
|
|
|
if (gst_mpd_client_has_isoff_ondemand_profile (dashdemux->client) &&
|
|
dashstream->sidx_parser.status == GST_ISOFF_SIDX_PARSER_FINISHED) {
|
|
/* fragment is advanced on data_received when byte limits are reached */
|
|
return GST_FLOW_OK;
|
|
} else {
|
|
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);
|
|
}
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_dash_demux_data_received (GstAdaptiveDemux * demux,
|
|
GstAdaptiveDemuxStream * stream)
|
|
{
|
|
GstDashDemuxStream *dash_stream = (GstDashDemuxStream *) stream;
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
GstBuffer *buffer;
|
|
gsize available;
|
|
|
|
if (stream->downloading_index) {
|
|
GstIsoffParserResult res;
|
|
guint consumed;
|
|
|
|
available = gst_adapter_available (stream->adapter);
|
|
buffer = gst_adapter_take_buffer (stream->adapter, available);
|
|
|
|
if (dash_stream->sidx_parser.status != GST_ISOFF_SIDX_PARSER_FINISHED) {
|
|
res =
|
|
gst_isoff_sidx_parser_add_buffer (&dash_stream->sidx_parser, buffer,
|
|
&consumed);
|
|
|
|
if (res == GST_ISOFF_PARSER_ERROR) {
|
|
} else if (res == GST_ISOFF_PARSER_UNEXPECTED) {
|
|
/* this is not a 'sidx' index, just skip it and continue playback */
|
|
} else {
|
|
/* when finished, prepare for real data streaming */
|
|
if (dash_stream->sidx_parser.status == GST_ISOFF_SIDX_PARSER_FINISHED) {
|
|
if (GST_CLOCK_TIME_IS_VALID (dash_stream->pending_seek_ts)) {
|
|
gst_dash_demux_stream_sidx_seek (dash_stream,
|
|
dash_stream->pending_seek_ts);
|
|
dash_stream->pending_seek_ts = GST_CLOCK_TIME_NONE;
|
|
} else {
|
|
SIDX (dash_stream)->entry_index = dash_stream->sidx_index;
|
|
}
|
|
dash_stream->sidx_current_remaining =
|
|
SIDX_CURRENT_ENTRY (dash_stream)->size;
|
|
} else if (consumed < available) {
|
|
GstBuffer *pending;
|
|
/* we still need to keep some data around for the next parsing round
|
|
* so just push what was already processed by the parser */
|
|
pending = _gst_buffer_split (buffer, consumed, -1);
|
|
gst_adapter_push (stream->adapter, pending);
|
|
}
|
|
}
|
|
}
|
|
ret = gst_adaptive_demux_stream_push_buffer (stream, buffer);
|
|
} else if (dash_stream->sidx_parser.status == GST_ISOFF_SIDX_PARSER_FINISHED) {
|
|
|
|
while (ret == GST_FLOW_OK
|
|
&& ((available = gst_adapter_available (stream->adapter)) > 0)) {
|
|
gboolean advance = FALSE;
|
|
|
|
if (available < dash_stream->sidx_current_remaining) {
|
|
buffer = gst_adapter_take_buffer (stream->adapter, available);
|
|
dash_stream->sidx_current_remaining -= available;
|
|
} else {
|
|
buffer =
|
|
gst_adapter_take_buffer (stream->adapter,
|
|
dash_stream->sidx_current_remaining);
|
|
dash_stream->sidx_current_remaining = 0;
|
|
advance = TRUE;
|
|
}
|
|
ret = gst_adaptive_demux_stream_push_buffer (stream, buffer);
|
|
if (advance) {
|
|
GstFlowReturn new_ret;
|
|
new_ret =
|
|
gst_adaptive_demux_stream_advance_fragment (demux, stream,
|
|
SIDX_CURRENT_ENTRY (dash_stream)->duration);
|
|
|
|
/* only overwrite if it was OK before */
|
|
if (ret == GST_FLOW_OK)
|
|
ret = new_ret;
|
|
}
|
|
}
|
|
} else {
|
|
/* this should be the main header, just push it all */
|
|
ret =
|
|
gst_adaptive_demux_stream_push_buffer (stream,
|
|
gst_adapter_take_buffer (stream->adapter,
|
|
gst_adapter_available (stream->adapter)));
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
gst_dash_demux_stream_free (GstAdaptiveDemuxStream * stream)
|
|
{
|
|
GstDashDemuxStream *dash_stream = (GstDashDemuxStream *) stream;
|
|
|
|
gst_isoff_sidx_parser_clear (&dash_stream->sidx_parser);
|
|
}
|