| /* |
| * DASH demux plugin for GStreamer |
| * |
| * gstdashdemux.c |
| * |
| * Copyright (C) 2012 Orange |
| * |
| * Authors: |
| * David Corvoysier <david.corvoysier@orange.com> |
| * Hamid Zakari <hamid.zakari@gmail.com> |
| * |
| * Copyright (C) 2013 Smart TV Alliance |
| * Author: Thiago Sousa Santos <thiago.sousa.santos@collabora.com>, Collabora Ltd. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public |
| * License along with this library (COPYING); if not, write to the |
| * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| * Boston, MA 02111-1307, USA. |
| */ |
| /** |
| * SECTION:element-dashdemux |
| * @title: dashdemux |
| * |
| * DASH demuxer element. |
| * ## Example launch line |
| * |[ |
| * 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" |
| * ]| |
| */ |
| |
| /* Implementation notes: |
| * |
| * The following section describes how dashdemux works internally. |
| * |
| * Introduction: |
| * |
| * dashdemux is a "fake" demux, as unlike traditional demux elements, it |
| * doesn't split data streams contained in an envelope to expose them to |
| * downstream decoding elements. |
| * |
| * Instead, it parses an XML file called a manifest to identify a set of |
| * individual stream fragments it needs to fetch and expose to the actual |
| * demux elements that will handle them (this behavior is sometimes |
| * referred as the "demux after a demux" scenario). |
| * |
| * For a given section of content, several representations corresponding |
| * to different bitrates may be available: dashdemux will select the most |
| * appropriate representation based on local conditions (typically the |
| * available bandwidth and the amount of buffering available, capped by |
| * a maximum allowed bitrate). |
| * |
| * The representation selection algorithm can be configured using |
| * specific properties: max bitrate, min/max buffering, bandwidth ratio. |
| * |
| * |
| * General Design: |
| * |
| * dashdemux has a single sink pad that accepts the data corresponding |
| * to the manifest, typically fetched from an HTTP or file source. |
| * |
| * dashdemux exposes the streams it recreates based on the fragments it |
| * fetches through dedicated src pads corresponding to the caps of the |
| * fragments container (ISOBMFF/MP4 or MPEG2TS). |
| * |
| * During playback, new representations will typically be exposed as a |
| * new set of pads (see 'Switching between representations' below). |
| * |
| * Fragments downloading is performed using a dedicated task that fills |
| * an internal queue. Another task is in charge of popping fragments |
| * from the queue and pushing them downstream. |
| * |
| * Switching between representations: |
| * |
| * Decodebin supports scenarios allowing to seamlessly switch from one |
| * stream to another inside the same "decoding chain". |
| * |
| * To achieve that, it combines the elements it autoplugged in chains |
| * and groups, allowing only one decoding group to be active at a given |
| * time for a given chain. |
| * |
| * A chain can signal decodebin that it is complete by sending a |
| * no-more-pads event, but even after that new pads can be added to |
| * create new subgroups, providing that a new no-more-pads event is sent. |
| * |
| * We take advantage of that to dynamically create a new decoding group |
| * in order to select a different representation during playback. |
| * |
| * Typically, assuming that each fragment contains both audio and video, |
| * the following tree would be created: |
| * |
| * chain "DASH Demux" |
| * |_ group "Representation set 1" |
| * | |_ chain "Qt Demux 0" |
| * | |_ group "Stream 0" |
| * | |_ chain "H264" |
| * | |_ chain "AAC" |
| * |_ group "Representation set 2" |
| * |_ chain "Qt Demux 1" |
| * |_ group "Stream 1" |
| * |_ chain "H264" |
| * |_ chain "AAC" |
| * |
| * Or, if audio and video are contained in separate fragments: |
| * |
| * chain "DASH Demux" |
| * |_ group "Representation set 1" |
| * | |_ chain "Qt Demux 0" |
| * | | |_ group "Stream 0" |
| * | | |_ chain "H264" |
| * | |_ chain "Qt Demux 1" |
| * | |_ group "Stream 1" |
| * | |_ chain "AAC" |
| * |_ group "Representation set 2" |
| * |_ chain "Qt Demux 3" |
| * | |_ group "Stream 2" |
| * | |_ chain "H264" |
| * |_ chain "Qt Demux 4" |
| * |_ group "Stream 3" |
| * |_ chain "AAC" |
| * |
| * In both cases, when switching from Set 1 to Set 2 an EOS is sent on |
| * each end pad corresponding to Rep 0, triggering the "drain" state to |
| * propagate upstream. |
| * Once both EOS have been processed, the "Set 1" group is completely |
| * drained, and decodebin2 will switch to the "Set 2" group. |
| * |
| * Note: nothing can be pushed to the new decoding group before the |
| * old one has been drained, which means that in order to be able to |
| * adapt quickly to bandwidth changes, we will not be able to rely |
| * on downstream buffering, and will instead manage an internal queue. |
| * |
| * |
| * Keyframe trick-mode implementation: |
| * |
| * When requested (with GST_SEEK_FLAG_TRICKMODE_KEY_UNIT) and if the format |
| * is supported (ISOBMFF profiles), dashdemux can download only keyframes |
| * in order to provide fast forward/reverse playback without exceeding the |
| * available bandwith/cpu/memory usage. |
| * |
| * This is done in two parts: |
| * 1) Parsing ISOBMFF atoms to detect the location of keyframes and only |
| * download/push those. |
| * 2) Deciding what the ideal next keyframe to download is in order to |
| * provide as many keyframes as possible without rebuffering. |
| * |
| * * Keyframe-only downloads: |
| * |
| * For each beginning of fragment, the fragment header will be parsed in |
| * gst_dash_demux_parse_isobmff() and then the information (offset, pts...) |
| * of each keyframe will be stored in moof_sync_samples. |
| * |
| * gst_dash_demux_stream_update_fragment_info() will specify the range |
| * start and end of the current keyframe, which will cause GstAdaptiveDemux |
| * to do a new upstream range request. |
| * |
| * When advancing, if there are still some keyframes in the current |
| * fragment, gst_dash_demux_stream_advance_fragment() will call |
| * gst_dash_demux_stream_advance_sync_sample() which decides what the next |
| * keyframe to get will be (it can be in reverse order for example, or |
| * might not be the *next* keyframe but one further as explained below). |
| * |
| * If no more keyframes are available in the current fragment, dash will |
| * advance to the next fragment (just like in the normal case) or to a |
| * fragment much further away (as explained below). |
| * |
| * |
| * * Deciding the optimal "next" keyframe/fragment to download: |
| * |
| * The main reason for doing keyframe-only downloads is for trick-modes |
| * (i.e. being able to do fast reverse/forward playback with limited |
| * bandwith/cpu/memory). |
| * |
| * Downloading all keyframes might not be the optimal solution, especially |
| * at high playback rates, since the time taken to download the keyframe |
| * might exceed the available running time between two displayed frames |
| * (i.e. all frames would end up arriving late). This would cause severe |
| * rebuffering. |
| * |
| * Note: The values specified below can be in either the segment running |
| * time or in absolute values. Where position values need to be converted |
| * to segment running time the "running_time(val)" notation is used, and |
| * where running time need ot be converted to segment poisition the |
| * "position(val)" notation is used. |
| * |
| * The goal instead is to be able to download/display as many frames as |
| * possible for a given playback rate. For that the implementation will |
| * take into account: |
| * * The requested playback rate and segment |
| * * The average time to request and download a keyframe (in running time) |
| * * The current position of dashdemux in the stream |
| * * The current downstream (i.e. sink) position (in running time) |
| * |
| * To reach this goal we consider that there is some amount of buffering |
| * (in time) between dashdemux and the display sink. While we do not know |
| * the exact amount of buffering available, a safe and reasonable assertion |
| * is that there is at least a second (in running time). |
| * |
| * The average time to request and fully download a keyframe (with or |
| * without fragment header) is obtained by averaging the |
| * GstAdaptiveDemuxStream->last_download_time and is stored in |
| * GstDashDemuxStream->average_download_time. Those values include the |
| * network latency and full download time, which are more interesting and |
| * correct than just bitrates (with small download sizes, the impact of the |
| * network latency is much higher). |
| * |
| * The current position is calculated based on the fragment timestamp and |
| * the current keyframe index within that fragment. It is stored in |
| * GstDashDemuxStream->actual_position. |
| * |
| * The downstream position of the pipeline is obtained via QoS events and |
| * is stored in GstAdaptiveDemuxStream->qos_earliest_time (note: it's a |
| * running time value). |
| * |
| * The estimated buffering level between dashdemux and downstream is |
| * therefore: |
| * buffering_level = running_time(actual_position) - qos_earliest_time |
| * |
| * In order to avoid rebuffering, we want to ensure that the next keyframe |
| * (including potential fragment header) we request will be download, demuxed |
| * and decoded in time so that it is not late. That next keyframe time is |
| * called the "target_time" and is calculated whenever we have finished |
| * pushing a keyframe downstream. |
| * |
| * One simple observation at this point is that we *need* to make sure that |
| * the target time is chosen such that: |
| * running_time(target_time) > qos_earliest_time + average_download_time |
| * |
| * i.e. we chose a target time which will be greater than the time at which |
| * downstream will be once we request and download the keyframe (otherwise |
| * we're guaranteed to be late). |
| * |
| * This would provide the highest number of displayed frames per |
| * second, but it is just a *minimal* value and is not enough as-is, |
| * since it doesn't take into account the following items which could |
| * cause frames to arrive late (and therefore rebuffering): |
| * * Network jitter (i.e. by how much the download time can fluctuate) |
| * * Network stalling |
| * * Different keyframe sizes (and therefore download time) |
| * * Decoding speed |
| * |
| * Instead, we adjust the target time calculation based on the |
| * buffering_level. |
| * |
| * The smaller the buffering level is (i.e. the closer we are between |
| * current and downstream), the more aggresively we skip forward (and |
| * guarantee the keyframe will be downloaded, decoded and displayed in |
| * time). And the higher the buffering level, the least aggresivelly |
| * we need to skip forward (and therefore display more frames per |
| * second). |
| * |
| * Right now the threshold for agressive switching is set to 3 |
| * average_download_time. Below that buffering level we set the target time |
| * to at least 3 average_download_time distance beyond the |
| * qos_earliest_time. |
| * |
| * If we are above that buffering level we set the target time to: |
| * position(running_time(position) + average_download_time) |
| * |
| * The logic is therefore: |
| * WHILE(!EOS) |
| * Calculate target_time |
| * Advance to keyframe/fragment for that target_time |
| * Adaptivedemux downloads that keyframe/fragment |
| * |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| # include "config.h" |
| #endif |
| |
| #include <string.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <inttypes.h> |
| #include <gio/gio.h> |
| #include <gst/base/gsttypefindhelper.h> |
| #include <gst/tag/tag.h> |
| #include <gst/net/gstnet.h> |
| #include "gst/gst-i18n-plugin.h" |
| #include "gstdashdemux.h" |
| #include "gstdash_debug.h" |
| |
| static GstStaticPadTemplate gst_dash_demux_videosrc_template = |
| GST_STATIC_PAD_TEMPLATE ("video_%02u", |
| GST_PAD_SRC, |
| GST_PAD_SOMETIMES, |
| GST_STATIC_CAPS_ANY); |
| |
| static GstStaticPadTemplate gst_dash_demux_audiosrc_template = |
| GST_STATIC_PAD_TEMPLATE ("audio_%02u", |
| GST_PAD_SRC, |
| GST_PAD_SOMETIMES, |
| GST_STATIC_CAPS_ANY); |
| |
| static GstStaticPadTemplate gst_dash_demux_subtitlesrc_template = |
| GST_STATIC_PAD_TEMPLATE ("subtitle_%02u", |
| GST_PAD_SRC, |
| GST_PAD_SOMETIMES, |
| GST_STATIC_CAPS_ANY); |
| |
| static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink", |
| GST_PAD_SINK, |
| GST_PAD_ALWAYS, |
| GST_STATIC_CAPS ("application/dash+xml")); |
| |
| GST_DEBUG_CATEGORY (gst_dash_demux_debug); |
| #define GST_CAT_DEFAULT gst_dash_demux_debug |
| |
| enum |
| { |
| PROP_0, |
| |
| PROP_MAX_BUFFERING_TIME, |
| PROP_BANDWIDTH_USAGE, |
| PROP_MAX_BITRATE, |
| PROP_MAX_VIDEO_WIDTH, |
| PROP_MAX_VIDEO_HEIGHT, |
| PROP_MAX_VIDEO_FRAMERATE, |
| PROP_PRESENTATION_DELAY, |
| PROP_LAST |
| }; |
| |
| /* Default values for properties */ |
| #define DEFAULT_MAX_BUFFERING_TIME 30 /* in seconds */ |
| #define DEFAULT_BANDWIDTH_USAGE 0.8f /* 0 to 1 */ |
| #define DEFAULT_MAX_BITRATE 0 /* in bit/s */ |
| #define DEFAULT_MAX_VIDEO_WIDTH 0 |
| #define DEFAULT_MAX_VIDEO_HEIGHT 0 |
| #define DEFAULT_MAX_VIDEO_FRAMERATE_N 0 |
| #define DEFAULT_MAX_VIDEO_FRAMERATE_D 1 |
| #define DEFAULT_PRESENTATION_DELAY "10s" /* 10s */ |
| |
| /* Clock drift compensation for live streams */ |
| #define SLOW_CLOCK_UPDATE_INTERVAL (1000000 * 30 * 60) /* 30 minutes */ |
| #define FAST_CLOCK_UPDATE_INTERVAL (1000000 * 30) /* 30 seconds */ |
| #define SUPPORTED_CLOCK_FORMATS (GST_MPD_UTCTIMING_TYPE_NTP | GST_MPD_UTCTIMING_TYPE_HTTP_HEAD | GST_MPD_UTCTIMING_TYPE_HTTP_XSDATE | GST_MPD_UTCTIMING_TYPE_HTTP_ISO | GST_MPD_UTCTIMING_TYPE_HTTP_NTP) |
| #define NTP_TO_UNIX_EPOCH G_GUINT64_CONSTANT(2208988800) /* difference (in seconds) between NTP epoch and Unix epoch */ |
| |
| struct _GstDashDemuxClockDrift |
| { |
| GMutex clock_lock; /* used to protect access to struct */ |
| guint selected_url; |
| gint64 next_update; |
| /* @clock_compensation: amount (in usecs) to add to client's idea of |
| now to map it to the server's idea of now */ |
| GTimeSpan clock_compensation; |
| GstClock *ntp_clock; |
| }; |
| |
| typedef struct |
| { |
| guint64 start_offset, end_offset; |
| /* TODO: Timestamp and duration */ |
| } GstDashStreamSyncSample; |
| |
| /* GObject */ |
| static void gst_dash_demux_set_property (GObject * object, guint prop_id, |
| const GValue * value, GParamSpec * pspec); |
| static void gst_dash_demux_get_property (GObject * object, guint prop_id, |
| GValue * value, GParamSpec * pspec); |
| static void gst_dash_demux_dispose (GObject * obj); |
| |
| /* GstAdaptiveDemux */ |
| static GstClockTime gst_dash_demux_get_duration (GstAdaptiveDemux * ademux); |
| static gboolean gst_dash_demux_is_live (GstAdaptiveDemux * ademux); |
| static void gst_dash_demux_reset (GstAdaptiveDemux * ademux); |
| static gboolean gst_dash_demux_process_manifest (GstAdaptiveDemux * ademux, |
| GstBuffer * buf); |
| static gboolean gst_dash_demux_seek (GstAdaptiveDemux * demux, GstEvent * seek); |
| static GstFlowReturn |
| gst_dash_demux_stream_update_fragment_info (GstAdaptiveDemuxStream * stream); |
| static GstFlowReturn gst_dash_demux_stream_seek (GstAdaptiveDemuxStream * |
| stream, gboolean forward, GstSeekFlags flags, GstClockTime ts, |
| GstClockTime * final_ts); |
| static gboolean gst_dash_demux_stream_has_next_fragment (GstAdaptiveDemuxStream |
| * stream); |
| static GstFlowReturn |
| gst_dash_demux_stream_advance_fragment (GstAdaptiveDemuxStream * stream); |
| static gboolean |
| gst_dash_demux_stream_advance_subfragment (GstAdaptiveDemuxStream * stream); |
| static gboolean gst_dash_demux_stream_select_bitrate (GstAdaptiveDemuxStream * |
| stream, guint64 bitrate); |
| static gint64 gst_dash_demux_get_manifest_update_interval (GstAdaptiveDemux * |
| demux); |
| static GstFlowReturn gst_dash_demux_update_manifest_data (GstAdaptiveDemux * |
| demux, GstBuffer * buf); |
| static gint64 |
| gst_dash_demux_stream_get_fragment_waiting_time (GstAdaptiveDemuxStream * |
| stream); |
| static void gst_dash_demux_advance_period (GstAdaptiveDemux * demux); |
| static gboolean gst_dash_demux_has_next_period (GstAdaptiveDemux * demux); |
| static GstFlowReturn gst_dash_demux_data_received (GstAdaptiveDemux * demux, |
| GstAdaptiveDemuxStream * stream, GstBuffer * buffer); |
| static gboolean |
| gst_dash_demux_stream_fragment_start (GstAdaptiveDemux * demux, |
| GstAdaptiveDemuxStream * stream); |
| static GstFlowReturn |
| gst_dash_demux_stream_fragment_finished (GstAdaptiveDemux * demux, |
| GstAdaptiveDemuxStream * stream); |
| static gboolean gst_dash_demux_need_another_chunk (GstAdaptiveDemuxStream * |
| stream); |
| |
| /* GstDashDemux */ |
| static gboolean gst_dash_demux_setup_all_streams (GstDashDemux * demux); |
| static void gst_dash_demux_stream_free (GstAdaptiveDemuxStream * stream); |
| |
| static GstCaps *gst_dash_demux_get_input_caps (GstDashDemux * demux, |
| GstActiveStream * stream); |
| static GstPad *gst_dash_demux_create_pad (GstDashDemux * demux, |
| GstActiveStream * stream); |
| static GstDashDemuxClockDrift *gst_dash_demux_clock_drift_new (GstDashDemux * |
| demux); |
| static void gst_dash_demux_clock_drift_free (GstDashDemuxClockDrift *); |
| static gboolean gst_dash_demux_poll_clock_drift (GstDashDemux * demux); |
| static GTimeSpan gst_dash_demux_get_clock_compensation (GstDashDemux * demux); |
| static GDateTime *gst_dash_demux_get_server_now_utc (GstDashDemux * demux); |
| |
| #define SIDX(s) (&(s)->sidx_parser.sidx) |
| |
| static inline GstSidxBoxEntry * |
| SIDX_ENTRY (GstDashDemuxStream * s, gint i) |
| { |
| g_assert (i < SIDX (s)->entries_count); |
| return &(SIDX (s)->entries[(i)]); |
| } |
| |
| #define SIDX_CURRENT_ENTRY(s) SIDX_ENTRY(s, SIDX(s)->entry_index) |
| |
| static void gst_dash_demux_send_content_protection_event (gpointer cp_data, |
| gpointer stream); |
| |
| #define gst_dash_demux_parent_class parent_class |
| G_DEFINE_TYPE_WITH_CODE (GstDashDemux, gst_dash_demux, GST_TYPE_ADAPTIVE_DEMUX, |
| GST_DEBUG_CATEGORY_INIT (gst_dash_demux_debug, "dashdemux", 0, |
| "dashdemux element") |
| ); |
| |
| static void |
| gst_dash_demux_dispose (GObject * obj) |
| { |
| GstDashDemux *demux = GST_DASH_DEMUX (obj); |
| |
| gst_dash_demux_reset (GST_ADAPTIVE_DEMUX_CAST (demux)); |
| |
| if (demux->client) { |
| gst_mpd_client_free (demux->client); |
| demux->client = NULL; |
| } |
| |
| g_mutex_clear (&demux->client_lock); |
| |
| gst_dash_demux_clock_drift_free (demux->clock_drift); |
| demux->clock_drift = NULL; |
| g_free (demux->default_presentation_delay); |
| G_OBJECT_CLASS (parent_class)->dispose (obj); |
| } |
| |
| static gboolean |
| gst_dash_demux_get_live_seek_range (GstAdaptiveDemux * demux, gint64 * start, |
| gint64 * stop) |
| { |
| GstDashDemux *self = GST_DASH_DEMUX (demux); |
| GDateTime *now; |
| GDateTime *mstart; |
| GTimeSpan stream_now; |
| GstClockTime seg_duration; |
| |
| if (self->client->mpd_node->availabilityStartTime == NULL) |
| return FALSE; |
| |
| seg_duration = gst_mpd_client_get_maximum_segment_duration (self->client); |
| now = gst_dash_demux_get_server_now_utc (self); |
| mstart = |
| gst_date_time_to_g_date_time (self->client-> |
| mpd_node->availabilityStartTime); |
| stream_now = g_date_time_difference (now, mstart); |
| g_date_time_unref (now); |
| g_date_time_unref (mstart); |
| |
| if (stream_now <= 0) |
| return FALSE; |
| |
| *stop = stream_now * GST_USECOND; |
| if (self->client->mpd_node->timeShiftBufferDepth == GST_MPD_DURATION_NONE) { |
| *start = 0; |
| } else { |
| *start = |
| *stop - (self->client->mpd_node->timeShiftBufferDepth * GST_MSECOND); |
| if (*start < 0) |
| *start = 0; |
| } |
| |
| /* As defined in 5.3.9.5.3 of the DASH specification, a segment does |
| not become available until the sum of: |
| * the value of the MPD@availabilityStartTime, |
| * the PeriodStart time of the containing Period |
| * the MPD start time of the Media Segment, and |
| * the MPD duration of the Media Segment. |
| Therefore we need to subtract the media segment duration from the stop |
| time. |
| */ |
| *stop -= seg_duration; |
| return TRUE; |
| } |
| |
| static GstClockTime |
| gst_dash_demux_get_presentation_offset (GstAdaptiveDemux * demux, |
| GstAdaptiveDemuxStream * stream) |
| { |
| GstDashDemuxStream *dashstream = (GstDashDemuxStream *) stream; |
| GstDashDemux *dashdemux = GST_DASH_DEMUX_CAST (demux); |
| |
| return gst_mpd_parser_get_stream_presentation_offset (dashdemux->client, |
| dashstream->index); |
| } |
| |
| static GstClockTime |
| gst_dash_demux_get_period_start_time (GstAdaptiveDemux * demux) |
| { |
| GstDashDemux *dashdemux = GST_DASH_DEMUX_CAST (demux); |
| |
| return gst_mpd_parser_get_period_start_time (dashdemux->client); |
| } |
| |
| static void |
| gst_dash_demux_class_init (GstDashDemuxClass * klass) |
| { |
| GObjectClass *gobject_class; |
| GstElementClass *gstelement_class; |
| GstAdaptiveDemuxClass *gstadaptivedemux_class; |
| |
| gobject_class = (GObjectClass *) klass; |
| gstelement_class = (GstElementClass *) klass; |
| gstadaptivedemux_class = (GstAdaptiveDemuxClass *) klass; |
| |
| gobject_class->set_property = gst_dash_demux_set_property; |
| gobject_class->get_property = gst_dash_demux_get_property; |
| gobject_class->dispose = gst_dash_demux_dispose; |
| |
| #ifndef GST_REMOVE_DEPRECATED |
| g_object_class_install_property (gobject_class, PROP_MAX_BUFFERING_TIME, |
| g_param_spec_uint ("max-buffering-time", "Maximum buffering time", |
| "Maximum number of seconds of buffer accumulated during playback" |
| "(deprecated)", |
| 2, G_MAXUINT, DEFAULT_MAX_BUFFERING_TIME, |
| G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | G_PARAM_DEPRECATED)); |
| |
| g_object_class_install_property (gobject_class, PROP_BANDWIDTH_USAGE, |
| g_param_spec_float ("bandwidth-usage", |
| "Bandwidth usage [0..1]", |
| "Percentage of the available bandwidth to use when " |
| "selecting representations (deprecated)", |
| 0, 1, DEFAULT_BANDWIDTH_USAGE, |
| G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | G_PARAM_DEPRECATED)); |
| #endif |
| |
| g_object_class_install_property (gobject_class, PROP_MAX_BITRATE, |
| g_param_spec_uint ("max-bitrate", "Max bitrate", |
| "Max of bitrate supported by target video decoder (0 = no maximum)", |
| 0, G_MAXUINT, DEFAULT_MAX_BITRATE, |
| G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); |
| |
| g_object_class_install_property (gobject_class, PROP_MAX_VIDEO_WIDTH, |
| g_param_spec_uint ("max-video-width", "Max video width", |
| "Max video width to select (0 = no maximum)", |
| 0, G_MAXUINT, DEFAULT_MAX_VIDEO_WIDTH, |
| G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); |
| |
| g_object_class_install_property (gobject_class, PROP_MAX_VIDEO_HEIGHT, |
| g_param_spec_uint ("max-video-height", "Max video height", |
| "Max video height to select (0 = no maximum)", |
| 0, G_MAXUINT, DEFAULT_MAX_VIDEO_HEIGHT, |
| G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); |
| |
| g_object_class_install_property (gobject_class, PROP_MAX_VIDEO_FRAMERATE, |
| gst_param_spec_fraction ("max-video-framerate", "Max video framerate", |
| "Max video framerate to select (0/1 = no maximum)", |
| 0, 1, G_MAXINT, 1, DEFAULT_MAX_VIDEO_FRAMERATE_N, |
| DEFAULT_MAX_VIDEO_FRAMERATE_D, |
| G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); |
| |
| g_object_class_install_property (gobject_class, PROP_PRESENTATION_DELAY, |
| g_param_spec_string ("presentation-delay", "Presentation delay", |
| "Default presentation delay (in seconds, milliseconds or fragments) (e.g. 12s, 2500ms, 3f)", |
| DEFAULT_PRESENTATION_DELAY, |
| G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); |
| |
| gst_element_class_add_static_pad_template (gstelement_class, |
| &gst_dash_demux_audiosrc_template); |
| gst_element_class_add_static_pad_template (gstelement_class, |
| &gst_dash_demux_videosrc_template); |
| gst_element_class_add_static_pad_template (gstelement_class, |
| &gst_dash_demux_subtitlesrc_template); |
| |
| gst_element_class_add_static_pad_template (gstelement_class, &sinktemplate); |
| |
| gst_element_class_set_static_metadata (gstelement_class, |
| "DASH Demuxer", |
| "Codec/Demuxer/Adaptive", |
| "Dynamic Adaptive Streaming over HTTP demuxer", |
| "David Corvoysier <david.corvoysier@orange.com>\n\ |
| Hamid Zakari <hamid.zakari@gmail.com>\n\ |
| Gianluca Gennari <gennarone@gmail.com>"); |
| |
| |
| gstadaptivedemux_class->get_duration = gst_dash_demux_get_duration; |
| gstadaptivedemux_class->is_live = gst_dash_demux_is_live; |
| gstadaptivedemux_class->reset = gst_dash_demux_reset; |
| gstadaptivedemux_class->seek = gst_dash_demux_seek; |
| |
| gstadaptivedemux_class->process_manifest = gst_dash_demux_process_manifest; |
| gstadaptivedemux_class->update_manifest_data = |
| gst_dash_demux_update_manifest_data; |
| gstadaptivedemux_class->get_manifest_update_interval = |
| gst_dash_demux_get_manifest_update_interval; |
| |
| gstadaptivedemux_class->has_next_period = gst_dash_demux_has_next_period; |
| gstadaptivedemux_class->advance_period = gst_dash_demux_advance_period; |
| gstadaptivedemux_class->stream_has_next_fragment = |
| gst_dash_demux_stream_has_next_fragment; |
| gstadaptivedemux_class->stream_advance_fragment = |
| gst_dash_demux_stream_advance_fragment; |
| gstadaptivedemux_class->stream_get_fragment_waiting_time = |
| gst_dash_demux_stream_get_fragment_waiting_time; |
| gstadaptivedemux_class->stream_seek = gst_dash_demux_stream_seek; |
| gstadaptivedemux_class->stream_select_bitrate = |
| gst_dash_demux_stream_select_bitrate; |
| gstadaptivedemux_class->stream_update_fragment_info = |
| gst_dash_demux_stream_update_fragment_info; |
| gstadaptivedemux_class->stream_free = gst_dash_demux_stream_free; |
| gstadaptivedemux_class->get_live_seek_range = |
| gst_dash_demux_get_live_seek_range; |
| gstadaptivedemux_class->get_presentation_offset = |
| gst_dash_demux_get_presentation_offset; |
| gstadaptivedemux_class->get_period_start_time = |
| gst_dash_demux_get_period_start_time; |
| |
| gstadaptivedemux_class->start_fragment = gst_dash_demux_stream_fragment_start; |
| gstadaptivedemux_class->finish_fragment = |
| gst_dash_demux_stream_fragment_finished; |
| gstadaptivedemux_class->data_received = gst_dash_demux_data_received; |
| gstadaptivedemux_class->need_another_chunk = |
| gst_dash_demux_need_another_chunk; |
| } |
| |
| static void |
| gst_dash_demux_init (GstDashDemux * demux) |
| { |
| /* Properties */ |
| demux->max_buffering_time = DEFAULT_MAX_BUFFERING_TIME * GST_SECOND; |
| demux->max_bitrate = DEFAULT_MAX_BITRATE; |
| demux->max_video_width = DEFAULT_MAX_VIDEO_WIDTH; |
| demux->max_video_height = DEFAULT_MAX_VIDEO_HEIGHT; |
| demux->max_video_framerate_n = DEFAULT_MAX_VIDEO_FRAMERATE_N; |
| demux->max_video_framerate_d = DEFAULT_MAX_VIDEO_FRAMERATE_D; |
| demux->default_presentation_delay = g_strdup (DEFAULT_PRESENTATION_DELAY); |
| |
| g_mutex_init (&demux->client_lock); |
| |
| gst_adaptive_demux_set_stream_struct_size (GST_ADAPTIVE_DEMUX_CAST (demux), |
| sizeof (GstDashDemuxStream)); |
| } |
| |
| static void |
| gst_dash_demux_set_property (GObject * object, guint prop_id, |
| const GValue * value, GParamSpec * pspec) |
| { |
| GstAdaptiveDemux *adaptivedemux = GST_ADAPTIVE_DEMUX_CAST (object); |
| GstDashDemux *demux = GST_DASH_DEMUX (object); |
| |
| switch (prop_id) { |
| case PROP_MAX_BUFFERING_TIME: |
| demux->max_buffering_time = g_value_get_uint (value) * GST_SECOND; |
| break; |
| case PROP_BANDWIDTH_USAGE: |
| adaptivedemux->bitrate_limit = g_value_get_float (value); |
| break; |
| case PROP_MAX_BITRATE: |
| demux->max_bitrate = g_value_get_uint (value); |
| break; |
| case PROP_MAX_VIDEO_WIDTH: |
| demux->max_video_width = g_value_get_uint (value); |
| break; |
| case PROP_MAX_VIDEO_HEIGHT: |
| demux->max_video_height = g_value_get_uint (value); |
| break; |
| case PROP_MAX_VIDEO_FRAMERATE: |
| demux->max_video_framerate_n = gst_value_get_fraction_numerator (value); |
| demux->max_video_framerate_d = gst_value_get_fraction_denominator (value); |
| break; |
| case PROP_PRESENTATION_DELAY: |
| g_free (demux->default_presentation_delay); |
| demux->default_presentation_delay = g_value_dup_string (value); |
| break; |
| default: |
| G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); |
| break; |
| } |
| } |
| |
| static void |
| gst_dash_demux_get_property (GObject * object, guint prop_id, GValue * value, |
| GParamSpec * pspec) |
| { |
| GstAdaptiveDemux *adaptivedemux = GST_ADAPTIVE_DEMUX_CAST (object); |
| GstDashDemux *demux = GST_DASH_DEMUX (object); |
| |
| 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; |
| case PROP_MAX_VIDEO_WIDTH: |
| g_value_set_uint (value, demux->max_video_width); |
| break; |
| case PROP_MAX_VIDEO_HEIGHT: |
| g_value_set_uint (value, demux->max_video_height); |
| break; |
| case PROP_MAX_VIDEO_FRAMERATE: |
| gst_value_set_fraction (value, demux->max_video_framerate_n, |
| demux->max_video_framerate_d); |
| break; |
| case PROP_PRESENTATION_DELAY: |
| if (demux->default_presentation_delay == NULL) |
| g_value_set_static_string (value, ""); |
| else |
| g_value_set_string (value, demux->default_presentation_delay); |
| 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; |
| GstStructure *s; |
| 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; |
| |
| if (demux->trickmode_no_audio |
| && active_stream->mimeType == GST_STREAM_AUDIO) { |
| GST_DEBUG_OBJECT (demux, |
| "Skipping audio stream %d because of TRICKMODE_NO_AUDIO flag", i); |
| continue; |
| } |
| |
| srcpad = gst_dash_demux_create_pad (demux, active_stream); |
| if (srcpad == NULL) |
| continue; |
| |
| 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) { |
| GList *it; |
| |
| for (it = adp_set->ContentComponents; it; it = it->next) { |
| GstContentComponentNode *cc_node = it->data; |
| if (cc_node->lang) { |
| lang = cc_node->lang; |
| break; |
| } |
| } |
| } |
| } |
| |
| 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; |
| s = gst_caps_get_structure (caps, 0); |
| stream->allow_sidx = |
| gst_mpd_client_has_isoff_ondemand_profile (demux->client); |
| stream->is_isobmff = gst_structure_has_name (s, "video/quicktime") |
| || gst_structure_has_name (s, "audio/x-m4a"); |
| stream->first_sync_sample_always_after_moof = TRUE; |
| stream->adapter = gst_adapter_new (); |
| 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; |
| stream->sidx_position = GST_CLOCK_TIME_NONE; |
| stream->actual_position = GST_CLOCK_TIME_NONE; |
| stream->target_time = GST_CLOCK_TIME_NONE; |
| /* Set a default average keyframe download time of a quarter of a second */ |
| stream->average_download_time = 250 * GST_MSECOND; |
| if (active_stream->cur_adapt_set && |
| active_stream->cur_adapt_set->RepresentationBase && |
| active_stream->cur_adapt_set->RepresentationBase->ContentProtection) { |
| GST_DEBUG_OBJECT (demux, "Adding ContentProtection events to source pad"); |
| g_list_foreach (active_stream->cur_adapt_set->RepresentationBase-> |
| ContentProtection, gst_dash_demux_send_content_protection_event, |
| stream); |
| } |
| |
| gst_isoff_sidx_parser_init (&stream->sidx_parser); |
| } |
| |
| return TRUE; |
| } |
| |
| static void |
| gst_dash_demux_send_content_protection_event (gpointer data, gpointer userdata) |
| { |
| GstDescriptorType *cp = (GstDescriptorType *) data; |
| GstDashDemuxStream *stream = (GstDashDemuxStream *) userdata; |
| GstEvent *event; |
| GstBuffer *pssi; |
| glong pssi_len; |
| gchar *schemeIdUri; |
| |
| if (cp->schemeIdUri == NULL) |
| return; |
| |
| GST_TRACE_OBJECT (stream, "check schemeIdUri %s", cp->schemeIdUri); |
| /* RFC 2141 states: The leading "urn:" sequence is case-insensitive */ |
| schemeIdUri = g_ascii_strdown (cp->schemeIdUri, -1); |
| if (g_str_has_prefix (schemeIdUri, "urn:uuid:")) { |
| pssi_len = strlen (cp->value); |
| pssi = gst_buffer_new_wrapped (g_memdup (cp->value, pssi_len), pssi_len); |
| GST_LOG_OBJECT (stream, "Queuing Protection event on source pad"); |
| /* RFC 4122 states that the hex part of a UUID is in lower case, |
| * but some streams seem to ignore this and use upper case for the |
| * protection system ID */ |
| event = gst_event_new_protection (cp->schemeIdUri + 9, pssi, "dash/mpd"); |
| gst_adaptive_demux_stream_queue_event ((GstAdaptiveDemuxStream *) stream, |
| event); |
| gst_buffer_unref (pssi); |
| } |
| g_free (schemeIdUri); |
| } |
| |
| 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)) { |
| GDateTime *g_now; |
| if (dashdemux->client->mpd_node->availabilityStartTime == NULL) { |
| ret = FALSE; |
| GST_ERROR_OBJECT (demux, "MPD does not have availabilityStartTime"); |
| goto done; |
| } |
| if (dashdemux->clock_drift == NULL) { |
| gchar **urls; |
| urls = |
| gst_mpd_client_get_utc_timing_sources (dashdemux->client, |
| SUPPORTED_CLOCK_FORMATS, NULL); |
| if (urls) { |
| GST_DEBUG_OBJECT (dashdemux, "Found a supported UTCTiming element"); |
| dashdemux->clock_drift = gst_dash_demux_clock_drift_new (dashdemux); |
| gst_dash_demux_poll_clock_drift (dashdemux); |
| } |
| } |
| /* get period index for period encompassing the current time */ |
| g_now = gst_dash_demux_get_server_now_utc (dashdemux); |
| now = gst_date_time_new_from_g_date_time (g_now); |
| 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; |
| } else if (dashdemux->default_presentation_delay) { |
| gint64 dfp = |
| gst_mpd_client_parse_default_presentation_delay (dashdemux->client, |
| dashdemux->default_presentation_delay); |
| GstDateTime *target = gst_mpd_client_add_time_difference (now, |
| dfp * -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) |
| { |
| 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 (); |
| gst_mpd_client_set_uri_downloader (dashdemux->client, demux->downloader); |
| |
| 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_setup_media_presentation (dashdemux->client, 0, 0, |
| NULL)) { |
| 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; |
| case GST_STREAM_APPLICATION: |
| if (gst_mpd_client_active_stream_contains_subtitles (stream)) { |
| name = g_strdup_printf ("subtitle_%02u", demux->n_subtitle_streams++); |
| tmpl = |
| gst_static_pad_template_get (&gst_dash_demux_subtitlesrc_template); |
| } else { |
| return NULL; |
| } |
| break; |
| default: |
| g_assert_not_reached (); |
| return NULL; |
| } |
| |
| /* Create and activate new pads */ |
| pad = gst_pad_new_from_template (tmpl, name); |
| 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; |
| } |
| gst_dash_demux_clock_drift_free (demux->clock_drift); |
| demux->clock_drift = NULL; |
| demux->client = gst_mpd_client_new (); |
| gst_mpd_client_set_uri_downloader (demux->client, ademux->downloader); |
| |
| demux->n_audio_streams = 0; |
| demux->n_video_streams = 0; |
| demux->n_subtitle_streams = 0; |
| |
| demux->trickmode_no_audio = FALSE; |
| demux->allow_trickmode_key_units = TRUE; |
| } |
| |
| static GstCaps * |
| gst_dash_demux_get_video_input_caps (GstDashDemux * demux, |
| GstActiveStream * stream) |
| { |
| guint width = 0, height = 0; |
| gint fps_num = 0, fps_den = 1; |
| gboolean have_fps = FALSE; |
| 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); |
| have_fps = |
| gst_mpd_client_get_video_stream_framerate (stream, &fps_num, &fps_den); |
| } |
| caps = gst_mpd_client_get_stream_caps (stream); |
| if (caps == NULL) |
| return NULL; |
| |
| if (width > 0 && height > 0) { |
| gst_caps_set_simple (caps, "width", G_TYPE_INT, width, "height", |
| G_TYPE_INT, height, NULL); |
| } |
| |
| if (have_fps) { |
| gst_caps_set_simple (caps, "framerate", GST_TYPE_FRACTION, fps_num, |
| fps_den, NULL); |
| } |
| |
| return caps; |
| } |
| |
| static GstCaps * |
| gst_dash_demux_get_audio_input_caps (GstDashDemux * demux, |
| GstActiveStream * stream) |
| { |
| guint rate = 0, channels = 0; |
| 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); |
| } |
| caps = gst_mpd_client_get_stream_caps (stream); |
| if (caps == NULL) |
| return NULL; |
| |
| 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) |
| { |
| GstCaps *caps = NULL; |
| |
| if (stream == NULL) |
| return NULL; |
| |
| caps = gst_mpd_client_get_stream_caps (stream); |
| if (caps == NULL) |
| return NULL; |
| |
| 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) { |
| stream->fragment.header_uri = |
| gst_uri_join_strings (gst_mpdparser_get_baseURL (dashdemux->client, |
| dashstream->index), path); |
| g_free (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) { |
| stream->fragment.index_uri = |
| gst_uri_join_strings (gst_mpdparser_get_baseURL (dashdemux->client, |
| dashstream->index), path); |
| g_free (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); |
| |
| /* Reset chunk size if any */ |
| stream->fragment.chunk_size = 0; |
| dashstream->current_fragment_keyframe_distance = GST_CLOCK_TIME_NONE; |
| |
| if (GST_ADAPTIVE_DEMUX_STREAM_NEED_HEADER (stream) && isombff) { |
| gst_dash_demux_stream_update_headers_info (stream); |
| /* sidx entries may not be available in here */ |
| if (stream->fragment.index_uri |
| && dashstream->sidx_position != GST_CLOCK_TIME_NONE) { |
| /* request only the index to be downloaded as we need to reposition the |
| * stream to a subsegment */ |
| return GST_FLOW_OK; |
| } |
| } |
| |
| if (dashstream->moof_sync_samples |
| && GST_ADAPTIVE_DEMUX_IN_TRICKMODE_KEY_UNITS (dashdemux)) { |
| GstDashStreamSyncSample *sync_sample = |
| &g_array_index (dashstream->moof_sync_samples, GstDashStreamSyncSample, |
| dashstream->current_sync_sample); |
| |
| gst_mpd_client_get_next_fragment (dashdemux->client, dashstream->index, |
| &fragment); |
| |
| if (isombff && dashstream->sidx_position != GST_CLOCK_TIME_NONE |
| && SIDX (dashstream)->entries) { |
| GstSidxBoxEntry *entry = SIDX_CURRENT_ENTRY (dashstream); |
| dashstream->current_fragment_timestamp = fragment.timestamp = entry->pts; |
| dashstream->current_fragment_duration = fragment.duration = |
| entry->duration; |
| } else { |
| dashstream->current_fragment_timestamp = fragment.timestamp; |
| dashstream->current_fragment_duration = fragment.duration; |
| } |
| |
| dashstream->current_fragment_keyframe_distance = |
| fragment.duration / dashstream->moof_sync_samples->len; |
| dashstream->actual_position = |
| fragment.timestamp + |
| dashstream->current_sync_sample * |
| dashstream->current_fragment_keyframe_distance; |
| if (stream->segment.rate < 0.0) |
| dashstream->actual_position += |
| dashstream->current_fragment_keyframe_distance; |
| dashstream->actual_position = |
| MIN (dashstream->actual_position, |
| fragment.timestamp + fragment.duration); |
| |
| stream->fragment.uri = fragment.uri; |
| stream->fragment.timestamp = GST_CLOCK_TIME_NONE; |
| stream->fragment.duration = GST_CLOCK_TIME_NONE; |
| stream->fragment.range_start = sync_sample->start_offset; |
| stream->fragment.range_end = sync_sample->end_offset; |
| |
| GST_DEBUG_OBJECT (stream->pad, "Actual position %" GST_TIME_FORMAT, |
| GST_TIME_ARGS (dashstream->actual_position)); |
| |
| 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_adaptive_demux_stream_fragment_clear (&stream->fragment); |
| 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 mpd does not specify indexRange (i.e., null index_uri), |
| * sidx entries may not be available until download it */ |
| if (isombff && dashstream->sidx_position != GST_CLOCK_TIME_NONE |
| && SIDX (dashstream)->entries) { |
| GstSidxBoxEntry *entry = SIDX_CURRENT_ENTRY (dashstream); |
| stream->fragment.range_start = |
| dashstream->sidx_base_offset + entry->offset; |
| dashstream->actual_position = stream->fragment.timestamp = entry->pts; |
| dashstream->current_fragment_timestamp = stream->fragment.timestamp = |
| entry->pts; |
| dashstream->current_fragment_duration = stream->fragment.duration = |
| entry->duration; |
| if (stream->demux->segment.rate < 0.0) { |
| stream->fragment.range_end = |
| stream->fragment.range_start + entry->size - 1; |
| dashstream->actual_position += entry->duration; |
| } else { |
| stream->fragment.range_end = fragment.range_end; |
| } |
| } else { |
| dashstream->actual_position = stream->fragment.timestamp = |
| fragment.timestamp; |
| dashstream->current_fragment_timestamp = fragment.timestamp; |
| dashstream->current_fragment_duration = stream->fragment.duration = |
| fragment.duration; |
| if (stream->demux->segment.rate < 0.0) |
| dashstream->actual_position += fragment.duration; |
| stream->fragment.range_start = |
| MAX (fragment.range_start, dashstream->sidx_base_offset); |
| stream->fragment.range_end = fragment.range_end; |
| } |
| |
| GST_DEBUG_OBJECT (stream->pad, "Actual position %" GST_TIME_FORMAT, |
| GST_TIME_ARGS (dashstream->actual_position)); |
| |
| return GST_FLOW_OK; |
| } |
| |
| return GST_FLOW_EOS; |
| } |
| |
| static gint |
| gst_dash_demux_index_entry_search (GstSidxBoxEntry * entry, GstClockTime * ts, |
| gpointer user_data) |
| { |
| GstClockTime entry_ts = entry->pts + entry->duration; |
| if (entry_ts <= *ts) |
| return -1; |
| else if (entry->pts > *ts) |
| return 1; |
| else |
| return 0; |
| } |
| |
| static GstFlowReturn |
| gst_dash_demux_stream_sidx_seek (GstDashDemuxStream * dashstream, |
| gboolean forward, GstSeekFlags flags, GstClockTime ts, |
| GstClockTime * final_ts) |
| { |
| GstSidxBox *sidx = SIDX (dashstream); |
| GstSidxBoxEntry *entry; |
| gint idx = sidx->entries_count; |
| GstFlowReturn ret = GST_FLOW_OK; |
| |
| if (sidx->entries_count == 0) |
| return GST_FLOW_EOS; |
| |
| entry = |
| gst_util_array_binary_search (sidx->entries, sidx->entries_count, |
| sizeof (GstSidxBoxEntry), |
| (GCompareDataFunc) gst_dash_demux_index_entry_search, |
| GST_SEARCH_MODE_EXACT, &ts, NULL); |
| |
| /* No exact match found, nothing in our index |
| * This is usually a bug or broken stream, as the seeking code already |
| * makes sure that we're in the correct period and segment, and only need |
| * to find the correct place inside the segment. Allow for some rounding |
| * errors and inaccuracies here though */ |
| if (!entry) { |
| GstSidxBoxEntry *last_entry = &sidx->entries[sidx->entries_count - 1]; |
| |
| GST_WARNING_OBJECT (dashstream->parent.pad, "Couldn't find SIDX entry"); |
| |
| if (ts < sidx->entries[0].pts |
| && ts + 250 * GST_MSECOND >= sidx->entries[0].pts) |
| entry = &sidx->entries[0]; |
| else if (ts >= last_entry->pts + last_entry->duration && |
| ts < last_entry->pts + last_entry->duration + 250 * GST_MSECOND) |
| entry = last_entry; |
| } |
| if (!entry) |
| return GST_FLOW_EOS; |
| |
| idx = entry - sidx->entries; |
| |
| /* FIXME in reverse mode, if we are exactly at a fragment start it makes more |
| * sense to start from the end of the previous fragment */ |
| if (!forward && idx > 0 && entry->pts == ts) { |
| idx--; |
| entry = &sidx->entries[idx]; |
| } |
| |
| /* Now entry->pts <= ts < entry->pts + entry->duration, need to adjust for |
| * snapping */ |
| if ((flags & GST_SEEK_FLAG_SNAP_NEAREST) == GST_SEEK_FLAG_SNAP_NEAREST) { |
| if (idx + 1 < sidx->entries_count |
| && sidx->entries[idx + 1].pts - ts < ts - sidx->entries[idx].pts) |
| idx += 1; |
| } else if ((forward && (flags & GST_SEEK_FLAG_SNAP_AFTER)) || (!forward |
| && (flags & GST_SEEK_FLAG_SNAP_BEFORE))) { |
| if (idx + 1 < sidx->entries_count && entry->pts < ts) |
| idx += 1; |
| } |
| |
| g_assert (sidx->entry_index < sidx->entries_count); |
| |
| sidx->entry_index = idx; |
| dashstream->sidx_position = sidx->entries[idx].pts; |
| |
| if (final_ts) |
| *final_ts = dashstream->sidx_position; |
| |
| return ret; |
| } |
| |
| static GstFlowReturn |
| gst_dash_demux_stream_seek (GstAdaptiveDemuxStream * stream, gboolean forward, |
| GstSeekFlags flags, GstClockTime ts, GstClockTime * final_ts) |
| { |
| GstDashDemuxStream *dashstream = (GstDashDemuxStream *) stream; |
| GstDashDemux *dashdemux = GST_DASH_DEMUX_CAST (stream->demux); |
| gint last_index, last_repeat; |
| gboolean is_isobmff; |
| |
| last_index = dashstream->active_stream->segment_index; |
| last_repeat = dashstream->active_stream->segment_repeat_index; |
| |
| if (dashstream->adapter) |
| gst_adapter_clear (dashstream->adapter); |
| dashstream->current_offset = -1; |
| dashstream->current_index_header_or_data = 0; |
| |
| dashstream->isobmff_parser.current_fourcc = 0; |
| dashstream->isobmff_parser.current_start_offset = 0; |
| dashstream->isobmff_parser.current_size = 0; |
| |
| if (dashstream->moof) |
| gst_isoff_moof_box_free (dashstream->moof); |
| dashstream->moof = NULL; |
| if (dashstream->moof_sync_samples) |
| g_array_free (dashstream->moof_sync_samples, TRUE); |
| dashstream->moof_sync_samples = NULL; |
| dashstream->current_sync_sample = -1; |
| dashstream->target_time = GST_CLOCK_TIME_NONE; |
| |
| is_isobmff = gst_mpd_client_has_isoff_ondemand_profile (dashdemux->client); |
| |
| if (!gst_mpd_client_stream_seek (dashdemux->client, dashstream->active_stream, |
| forward, |
| is_isobmff ? (flags & (~(GST_SEEK_FLAG_SNAP_BEFORE | |
| GST_SEEK_FLAG_SNAP_AFTER))) : flags, ts, final_ts)) { |
| return GST_FLOW_EOS; |
| } |
| |
| if (is_isobmff) { |
| GstClockTime period_start, offset; |
| |
| period_start = gst_mpd_parser_get_period_start_time (dashdemux->client); |
| offset = |
| gst_mpd_parser_get_stream_presentation_offset (dashdemux->client, |
| dashstream->index); |
| |
| if (G_UNLIKELY (ts < period_start)) |
| ts = offset; |
| else |
| ts += offset - period_start; |
| |
| if (last_index != dashstream->active_stream->segment_index || |
| last_repeat != dashstream->active_stream->segment_repeat_index) { |
| GST_LOG_OBJECT (stream->pad, |
| "Segment index was changed, reset sidx parser"); |
| gst_isoff_sidx_parser_clear (&dashstream->sidx_parser); |
| dashstream->sidx_base_offset = 0; |
| dashstream->allow_sidx = TRUE; |
| } |
| |
| if (dashstream->sidx_parser.status == GST_ISOFF_SIDX_PARSER_FINISHED) { |
| if (gst_dash_demux_stream_sidx_seek (dashstream, forward, flags, ts, |
| final_ts) != GST_FLOW_OK) { |
| GST_ERROR_OBJECT (stream->pad, "Couldn't find position in sidx"); |
| dashstream->sidx_position = GST_CLOCK_TIME_NONE; |
| gst_isoff_sidx_parser_clear (&dashstream->sidx_parser); |
| } |
| dashstream->pending_seek_ts = GST_CLOCK_TIME_NONE; |
| } else { |
| /* no index yet, seek when we have it */ |
| /* FIXME - the final_ts won't be correct here */ |
| dashstream->pending_seek_ts = ts; |
| } |
| } |
| |
| stream->discont = TRUE; |
| |
| return GST_FLOW_OK; |
| } |
| |
| static gboolean |
| gst_dash_demux_stream_has_next_sync_sample (GstAdaptiveDemuxStream * stream) |
| { |
| GstDashDemuxStream *dashstream = (GstDashDemuxStream *) stream; |
| |
| if (dashstream->moof_sync_samples && |
| GST_ADAPTIVE_DEMUX_IN_TRICKMODE_KEY_UNITS (stream->demux)) { |
| if (stream->demux->segment.rate > 0.0) { |
| if (dashstream->current_sync_sample + 1 < |
| dashstream->moof_sync_samples->len) |
| return TRUE; |
| } else { |
| if (dashstream->current_sync_sample >= 1) |
| return TRUE; |
| } |
| } |
| return FALSE; |
| } |
| |
| static gboolean |
| gst_dash_demux_stream_has_next_subfragment (GstAdaptiveDemuxStream * stream) |
| { |
| GstDashDemuxStream *dashstream = (GstDashDemuxStream *) stream; |
| GstSidxBox *sidx = SIDX (dashstream); |
| |
| if (dashstream->sidx_parser.status == GST_ISOFF_SIDX_PARSER_FINISHED) { |
| if (stream->demux->segment.rate > 0.0) { |
| if (sidx->entry_index + 1 < sidx->entries_count) |
| return TRUE; |
| } else { |
| if (sidx->entry_index >= 1) |
| return TRUE; |
| } |
| } |
| return FALSE; |
| } |
| |
| static gboolean |
| gst_dash_demux_stream_advance_sync_sample (GstAdaptiveDemuxStream * stream, |
| GstClockTime target_time) |
| { |
| GstDashDemuxStream *dashstream = (GstDashDemuxStream *) stream; |
| gboolean fragment_finished = FALSE; |
| guint idx = -1; |
| |
| if (GST_CLOCK_TIME_IS_VALID (target_time)) { |
| GST_LOG_OBJECT (stream->pad, |
| "target_time:%" GST_TIME_FORMAT " fragment ts %" GST_TIME_FORMAT |
| " average keyframe dist: %" GST_TIME_FORMAT |
| " current keyframe dist: %" GST_TIME_FORMAT |
| " fragment duration:%" GST_TIME_FORMAT, |
| GST_TIME_ARGS (target_time), |
| GST_TIME_ARGS (dashstream->current_fragment_timestamp), |
| GST_TIME_ARGS (dashstream->keyframe_average_distance), |
| GST_TIME_ARGS (dashstream->current_fragment_keyframe_distance), |
| GST_TIME_ARGS (stream->fragment.duration)); |
| |
| if (stream->demux->segment.rate > 0.0) { |
| idx = |
| (target_time - |
| dashstream->current_fragment_timestamp) / |
| dashstream->current_fragment_keyframe_distance; |
| |
| /* Prevent getting stuck in a loop due to rounding errors */ |
| if (idx == dashstream->current_sync_sample) |
| idx++; |
| } else { |
| GstClockTime end_time = |
| dashstream->current_fragment_timestamp + |
| dashstream->current_fragment_duration; |
| |
| if (end_time < target_time) { |
| idx = dashstream->moof_sync_samples->len; |
| } else { |
| idx = |
| (end_time - |
| target_time) / dashstream->current_fragment_keyframe_distance; |
| if (idx == dashstream->moof_sync_samples->len) { |
| dashstream->current_sync_sample = -1; |
| fragment_finished = TRUE; |
| goto beach; |
| } |
| idx = dashstream->moof_sync_samples->len - 1 - idx; |
| } |
| |
| /* Prevent getting stuck in a loop due to rounding errors */ |
| if (idx == dashstream->current_sync_sample) { |
| if (idx == 0) { |
| dashstream->current_sync_sample = -1; |
| fragment_finished = TRUE; |
| goto beach; |
| } |
| |
| idx--; |
| } |
| } |
| } |
| |
| GST_DEBUG_OBJECT (stream->pad, |
| "Advancing sync sample #%d target #%d", |
| dashstream->current_sync_sample, idx); |
| |
| if (idx != -1 && idx >= dashstream->moof_sync_samples->len) { |
| dashstream->current_sync_sample = -1; |
| fragment_finished = TRUE; |
| goto beach; |
| } |
| |
| if (stream->demux->segment.rate > 0.0) { |
| /* Try to get the sync sample for the target time */ |
| if (idx != -1) { |
| dashstream->current_sync_sample = idx; |
| } else { |
| dashstream->current_sync_sample++; |
| if (dashstream->current_sync_sample >= dashstream->moof_sync_samples->len) { |
| fragment_finished = TRUE; |
| } |
| } |
| } else { |
| if (idx != -1) { |
| dashstream->current_sync_sample = idx; |
| } else if (dashstream->current_sync_sample == -1) { |
| dashstream->current_sync_sample = dashstream->moof_sync_samples->len - 1; |
| } else if (dashstream->current_sync_sample == 0) { |
| dashstream->current_sync_sample = -1; |
| fragment_finished = TRUE; |
| } else { |
| dashstream->current_sync_sample--; |
| } |
| } |
| |
| beach: |
| GST_DEBUG_OBJECT (stream->pad, |
| "Advancing sync sample #%d fragment_finished:%d", |
| dashstream->current_sync_sample, fragment_finished); |
| |
| if (!fragment_finished) |
| stream->discont = TRUE; |
| |
| return !fragment_finished; |
| } |
| |
| 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) { |
| gint idx = ++sidx->entry_index; |
| if (idx < sidx->entries_count) { |
| fragment_finished = FALSE; |
| } |
| |
| if (idx == sidx->entries_count) |
| dashstream->sidx_position = |
| sidx->entries[idx - 1].pts + sidx->entries[idx - 1].duration; |
| else |
| dashstream->sidx_position = sidx->entries[idx].pts; |
| } else { |
| gint idx = --sidx->entry_index; |
| |
| if (idx >= 0) { |
| fragment_finished = FALSE; |
| dashstream->sidx_position = sidx->entries[idx].pts; |
| } else { |
| dashstream->sidx_position = GST_CLOCK_TIME_NONE; |
| } |
| } |
| } |
| |
| GST_DEBUG_OBJECT (stream->pad, "New sidx index: %d / %d. " |
| "Finished fragment: %d", sidx->entry_index, sidx->entries_count, |
| fragment_finished); |
| |
| 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; |
| |
| if (dashstream->moof_sync_samples && |
| GST_ADAPTIVE_DEMUX_IN_TRICKMODE_KEY_UNITS (dashdemux)) { |
| if (gst_dash_demux_stream_has_next_sync_sample (stream)) |
| return TRUE; |
| } |
| |
| if (gst_mpd_client_has_isoff_ondemand_profile (dashdemux->client)) { |
| if (gst_dash_demux_stream_has_next_subfragment (stream)) |
| return TRUE; |
| } |
| |
| return gst_mpd_client_has_next_segment (dashdemux->client, |
| dashstream->active_stream, stream->demux->segment.rate > 0.0); |
| } |
| |
| /* The goal here is to figure out, once we have pushed a keyframe downstream, |
| * what the next ideal keyframe to download is. |
| * |
| * This is done based on: |
| * * the current internal position (i.e. actual_position) |
| * * the reported downstream position (QoS feedback) |
| * * the average keyframe download time (average_download_time) |
| */ |
| static GstClockTime |
| gst_dash_demux_stream_get_target_time (GstDashDemux * dashdemux, |
| GstAdaptiveDemuxStream * stream, GstClockTime cur_position, |
| GstClockTime min_skip) |
| { |
| GstDashDemuxStream *dashstream = (GstDashDemuxStream *) stream; |
| GstClockTime cur_running, min_running, min_position; |
| GstClockTimeDiff diff; |
| GstClockTime ret = cur_position; |
| GstClockTime deadline; |
| GstClockTime earliest_time = GST_CLOCK_TIME_NONE; |
| |
| g_assert (min_skip > 0); |
| |
| /* minimum stream position we have to skip to */ |
| if (stream->segment.rate > 0) |
| min_position = cur_position + min_skip; |
| else if (cur_position < min_skip) |
| min_position = 0; |
| else |
| min_position = cur_position - min_skip; |
| |
| /* Use current clock time or the QoS earliest time, whichever is further in |
| * the future. The QoS time is only updated on every QoS event and |
| * especially not if e.g. a videodecoder or converter drops a frame further |
| * downstream. |
| * |
| * We only use the times if we ever received a QoS event since the last |
| * flush, as otherwise base_time and clock might not be correct because of a |
| * still pre-rolling sink |
| */ |
| if (stream->qos_earliest_time != GST_CLOCK_TIME_NONE) { |
| GstClock *clock; |
| |
| clock = gst_element_get_clock (GST_ELEMENT_CAST (dashdemux)); |
| |
| if (clock) { |
| GstClockTime base_time; |
| GstClockTime now_time; |
| |
| base_time = gst_element_get_base_time (GST_ELEMENT_CAST (dashdemux)); |
| now_time = gst_clock_get_time (clock); |
| if (now_time > base_time) |
| now_time -= base_time; |
| else |
| now_time = 0; |
| |
| gst_object_unref (clock); |
| |
| earliest_time = MAX (now_time, stream->qos_earliest_time); |
| } else { |
| earliest_time = stream->qos_earliest_time; |
| } |
| } |
| |
| /* our current position in running time */ |
| cur_running = |
| gst_segment_to_running_time (&stream->segment, GST_FORMAT_TIME, |
| cur_position); |
| |
| /* the minimum position we have to skip to in running time */ |
| min_running = |
| gst_segment_to_running_time (&stream->segment, GST_FORMAT_TIME, |
| min_position); |
| |
| GST_DEBUG_OBJECT (stream->pad, |
| "position: current %" GST_TIME_FORMAT " min next %" GST_TIME_FORMAT, |
| GST_TIME_ARGS (cur_position), GST_TIME_ARGS (min_position)); |
| GST_DEBUG_OBJECT (stream->pad, |
| "running time: current %" GST_TIME_FORMAT " min next %" GST_TIME_FORMAT |
| " earliest %" GST_TIME_FORMAT, GST_TIME_ARGS (cur_running), |
| GST_TIME_ARGS (min_running), GST_TIME_ARGS (earliest_time)); |
| |
| /* Take configured maximum video bandwidth and framerate into account */ |
| { |
| GstClockTime min_run_dist, min_frame_dist, diff = 0; |
| guint max_fps_n, max_fps_d; |
| |
| min_run_dist = min_skip / ABS (stream->segment.rate); |
| |
| if (dashdemux->max_video_framerate_n != 0) { |
| max_fps_n = dashdemux->max_video_framerate_n; |
| max_fps_d = dashdemux->max_video_framerate_d; |
| } else { |
| /* more than 10 fps is not very useful if we're skipping anyway */ |
| max_fps_n = 10; |
| max_fps_d = 1; |
| } |
| |
| min_frame_dist = gst_util_uint64_scale_ceil (GST_SECOND, |
| max_fps_d, max_fps_n); |
| |
| GST_DEBUG_OBJECT (stream->pad, |
| "Have max framerate %d/%d - Min dist %" GST_TIME_FORMAT |
| ", min requested dist %" GST_TIME_FORMAT, |
| max_fps_n, max_fps_d, |
| GST_TIME_ARGS (min_run_dist), GST_TIME_ARGS (min_frame_dist)); |
| if (min_frame_dist > min_run_dist) |
| diff = MAX (diff, min_frame_dist - min_run_dist); |
| |
| if (dashdemux->max_bitrate != 0) { |
| guint64 max_bitrate = gst_util_uint64_scale_ceil (GST_SECOND, |
| 8 * dashstream->keyframe_average_size, |
| dashstream->keyframe_average_distance) * ABS (stream->segment.rate); |
| |
| if (max_bitrate > dashdemux->max_bitrate) { |
| min_frame_dist = gst_util_uint64_scale_ceil (GST_SECOND, |
| 8 * dashstream->keyframe_average_size, |
| dashdemux->max_bitrate) * ABS (stream->segment.rate); |
| |
| GST_DEBUG_OBJECT (stream->pad, |
| "Have max bitrate %u - Min dist %" GST_TIME_FORMAT |
| ", min requested dist %" GST_TIME_FORMAT, dashdemux->max_bitrate, |
| GST_TIME_ARGS (min_run_dist), GST_TIME_ARGS (min_frame_dist)); |
| if (min_frame_dist > min_run_dist) |
| diff = MAX (diff, min_frame_dist - min_run_dist); |
| } |
| } |
| |
| if (diff > 0) { |
| GST_DEBUG_OBJECT (stream->pad, |
| "Skipping further ahead by %" GST_TIME_FORMAT, GST_TIME_ARGS (diff)); |
| min_running += diff; |
| } |
| } |
| |
| if (earliest_time == GST_CLOCK_TIME_NONE) { |
| GstClockTime run_key_dist; |
| |
| run_key_dist = |
| dashstream->keyframe_average_distance / ABS (stream->segment.rate); |
| |
| /* If we don't have downstream information (such as at startup or |
| * without live sinks), just get the next time by taking the minimum |
| * amount we have to skip ahead |
| * Except if it takes us longer to download */ |
| if (run_key_dist > dashstream->average_download_time) |
| ret = |
| gst_segment_position_from_running_time (&stream->segment, |
| GST_FORMAT_TIME, min_running); |
| else |
| ret = gst_segment_position_from_running_time (&stream->segment, |
| GST_FORMAT_TIME, |
| min_running - run_key_dist + dashstream->average_download_time); |
| |
| GST_DEBUG_OBJECT (stream->pad, |
| "Advancing to %" GST_TIME_FORMAT " (was %" GST_TIME_FORMAT ")", |
| GST_TIME_ARGS (ret), GST_TIME_ARGS (min_position)); |
| |
| goto out; |
| } |
| |
| /* Figure out the difference, in running time, between where we are and |
| * where downstream is */ |
| diff = min_running - earliest_time; |
| GST_LOG_OBJECT (stream->pad, |
| "min_running %" GST_TIME_FORMAT " diff %" GST_STIME_FORMAT |
| " average_download %" GST_TIME_FORMAT, GST_TIME_ARGS (min_running), |
| GST_STIME_ARGS (diff), GST_TIME_ARGS (dashstream->average_download_time)); |
| |
| /* Have at least 500ms or 3 keyframes safety between current position and downstream */ |
| deadline = MAX (500 * GST_MSECOND, 3 * dashstream->average_download_time); |
| |
| /* The furthest away we are from the current position, the least we need to advance */ |
| if (diff < 0 || diff < deadline) { |
| /* Force skipping (but not more than 1s ahead) */ |
| ret = |
| gst_segment_position_from_running_time (&stream->segment, |
| GST_FORMAT_TIME, earliest_time + MIN (deadline, GST_SECOND)); |
| GST_DEBUG_OBJECT (stream->pad, |
| "MUST SKIP to at least %" GST_TIME_FORMAT " (was %" GST_TIME_FORMAT ")", |
| GST_TIME_ARGS (ret), GST_TIME_ARGS (min_position)); |
| } else if (diff < 4 * dashstream->average_download_time) { |
| /* Go forward a bit less aggresively (and at most 1s forward) */ |
| ret = gst_segment_position_from_running_time (&stream->segment, |
| GST_FORMAT_TIME, min_running + MIN (GST_SECOND, |
| 2 * dashstream->average_download_time)); |
| GST_DEBUG_OBJECT (stream->pad, |
| "MUST SKIP to at least %" GST_TIME_FORMAT " (was %" GST_TIME_FORMAT ")", |
| GST_TIME_ARGS (ret), GST_TIME_ARGS (min_position)); |
| } else { |
| /* Get the next position satisfying the download time */ |
| ret = gst_segment_position_from_running_time (&stream->segment, |
| GST_FORMAT_TIME, min_running); |
| GST_DEBUG_OBJECT (stream->pad, |
| "Advance to %" GST_TIME_FORMAT " (was %" GST_TIME_FORMAT ")", |
| GST_TIME_ARGS (ret), GST_TIME_ARGS (min_position)); |
| } |
| |
| out: |
| |
| { |
| GstClockTime cur_skip = |
| (cur_position < ret) ? ret - cur_position : cur_position - ret; |
| |
| if (dashstream->average_skip_size == 0) { |
| dashstream->average_skip_size = cur_skip; |
| } else { |
| dashstream->average_skip_size = |
| (cur_skip + 3 * dashstream->average_skip_size) / 4; |
| } |
| |
| if (dashstream->average_skip_size > |
| cur_skip + dashstream->keyframe_average_distance |
| && dashstream->average_skip_size > min_skip) { |
| if (stream->segment.rate > 0) |
| ret = cur_position + dashstream->average_skip_size; |
| else if (cur_position > dashstream->average_skip_size) |
| ret = cur_position - dashstream->average_skip_size; |
| else |
| ret = 0; |
| } |
| } |
| |
| return ret; |
| } |
| |
| static GstFlowReturn |
| gst_dash_demux_stream_advance_fragment (GstAdaptiveDemuxStream * stream) |
| { |
| GstDashDemuxStream *dashstream = (GstDashDemuxStream *) stream; |
| GstDashDemux *dashdemux = GST_DASH_DEMUX_CAST (stream->demux); |
| GstClockTime target_time = GST_CLOCK_TIME_NONE; |
| GstClockTime previous_position; |
| GstFlowReturn ret; |
| |
| GST_DEBUG_OBJECT (stream->pad, "Advance fragment"); |
| |
| /* Update download statistics */ |
| if (dashstream->moof_sync_samples && |
| GST_ADAPTIVE_DEMUX_IN_TRICKMODE_KEY_UNITS (dashdemux) && |
| GST_CLOCK_TIME_IS_VALID (stream->last_download_time)) { |
| if (GST_CLOCK_TIME_IS_VALID (dashstream->average_download_time)) { |
| dashstream->average_download_time = |
| (3 * dashstream->average_download_time + |
| stream->last_download_time) / 4; |
| } else { |
| dashstream->average_download_time = stream->last_download_time; |
| } |
| |
| GST_DEBUG_OBJECT (stream->pad, |
| "Download time last: %" GST_TIME_FORMAT " average: %" GST_TIME_FORMAT, |
| GST_TIME_ARGS (stream->last_download_time), |
| GST_TIME_ARGS (dashstream->average_download_time)); |
| } |
| |
| previous_position = dashstream->actual_position; |
| |
| /* Update internal position */ |
| if (GST_CLOCK_TIME_IS_VALID (dashstream->actual_position)) { |
| GstClockTime dur; |
| if (dashstream->moof_sync_samples |
| && GST_ADAPTIVE_DEMUX_IN_TRICKMODE_KEY_UNITS (dashdemux)) { |
| GST_LOG_OBJECT (stream->pad, "current sync sample #%d", |
| dashstream->current_sync_sample); |
| if (dashstream->current_sync_sample == -1) { |
| dur = 0; |
| } else if (dashstream->current_sync_sample < |
| dashstream->moof_sync_samples->len) { |
| dur = dashstream->current_fragment_keyframe_distance; |
| } else { |
| if (gst_mpd_client_has_isoff_ondemand_profile (dashdemux->client) && |
| dashstream->sidx_position != GST_CLOCK_TIME_NONE |
| && SIDX (dashstream)->entries) { |
| GstSidxBoxEntry *entry = SIDX_CURRENT_ENTRY (dashstream); |
| dur = entry->duration; |
| } else { |
| dur = |
| dashstream->current_fragment_timestamp + |
| dashstream->current_fragment_duration - |
| dashstream->actual_position; |
| } |
| } |
| } else if (gst_mpd_client_has_isoff_ondemand_profile (dashdemux->client) && |
| dashstream->sidx_position != GST_CLOCK_TIME_NONE |
| && SIDX (dashstream)->entries) { |
| GstSidxBoxEntry *entry = SIDX_CURRENT_ENTRY (dashstream); |
| dur = entry->duration; |
| } else { |
| dur = stream->fragment.duration; |
| } |
| |
| if (dashstream->moof_sync_samples |
| && GST_ADAPTIVE_DEMUX_IN_TRICKMODE_KEY_UNITS (dashdemux)) { |
| /* We just downloaded the header, we actually use the previous |
| * target_time now as it was not used up yet */ |
| if (dashstream->current_sync_sample == -1) |
| target_time = dashstream->target_time; |
| else |
| target_time = |
| gst_dash_demux_stream_get_target_time (dashdemux, stream, |
| dashstream->actual_position, dur); |
| dashstream->actual_position = target_time; |
| } else { |
| /* Adjust based on direction */ |
| if (stream->demux->segment.rate > 0.0) |
| dashstream->actual_position += dur; |
| else if (dashstream->actual_position >= dur) |
| dashstream->actual_position -= dur; |
| else |
| dashstream->actual_position = 0; |
| } |
| |
| GST_DEBUG_OBJECT (stream->pad, "Actual position %" GST_TIME_FORMAT, |
| GST_TIME_ARGS (dashstream->actual_position)); |
| } |
| dashstream->target_time = target_time; |
| |
| GST_DEBUG_OBJECT (stream->pad, "target_time: %" GST_TIME_FORMAT, |
| GST_TIME_ARGS (target_time)); |
| |
| /* If downloading only keyframes, switch to the next one or fall through */ |
| if (dashstream->moof_sync_samples && |
| GST_ADAPTIVE_DEMUX_IN_TRICKMODE_KEY_UNITS (dashdemux)) { |
| if (gst_dash_demux_stream_advance_sync_sample (stream, target_time)) |
| return GST_FLOW_OK; |
| } |
| |
| dashstream->isobmff_parser.current_fourcc = 0; |
| dashstream->isobmff_parser.current_start_offset = 0; |
| dashstream->isobmff_parser.current_size = 0; |
| |
| if (dashstream->moof) |
| gst_isoff_moof_box_free (dashstream->moof); |
| dashstream->moof = NULL; |
| if (dashstream->moof_sync_samples) |
| g_array_free (dashstream->moof_sync_samples, TRUE); |
| dashstream->moof_sync_samples = NULL; |
| dashstream->current_sync_sample = -1; |
| |
| /* Check if we just need to 'advance' to the next fragment, or if we |
| * need to skip by more. */ |
| if (GST_CLOCK_TIME_IS_VALID (target_time) |
| && GST_ADAPTIVE_DEMUX_IN_TRICKMODE_KEY_UNITS (stream->demux) && |
| dashstream->active_stream->mimeType == GST_STREAM_VIDEO) { |
| GstClockTime actual_ts; |
| GstSeekFlags flags = 0; |
| |
| /* Key-unit trick mode, seek to fragment containing target time |
| * |
| * We first try seeking without snapping. As above code to skip keyframes |
| * in the current fragment was not successful, we should go at least one |
| * fragment ahead. Due to rounding errors we could end up at the same |
| * fragment again here, in which case we retry seeking with the SNAP_AFTER |
| * flag. |
| * |
| * We don't always set that flag as we would then end up one further |
| * fragment in the future in all good cases. |
| */ |
| while (TRUE) { |
| ret = |
| gst_dash_demux_stream_seek (stream, (stream->segment.rate > 0), flags, |
| target_time, &actual_ts); |
| |
| if (ret != GST_FLOW_OK) { |
| GST_WARNING_OBJECT (stream->pad, "Failed to seek to %" GST_TIME_FORMAT, |
| GST_TIME_ARGS (target_time)); |
| /* Give up */ |
| if (flags != 0) |
| break; |
| |
| /* Retry with skipping ahead */ |
| flags |= GST_SEEK_FLAG_SNAP_AFTER; |
| continue; |
| } |
| |
| GST_DEBUG_OBJECT (stream->pad, |
| "Skipped to %" GST_TIME_FORMAT " (wanted %" GST_TIME_FORMAT ", was %" |
| GST_TIME_FORMAT ")", GST_TIME_ARGS (actual_ts), |
| GST_TIME_ARGS (target_time), GST_TIME_ARGS (previous_position)); |
| |
| if ((stream->segment.rate > 0 && actual_ts <= previous_position) || |
| (stream->segment.rate < 0 && actual_ts >= previous_position)) { |
| /* Give up */ |
| if (flags != 0) |
| break; |
| |
| /* Retry with forcing skipping ahead */ |
| flags |= GST_SEEK_FLAG_SNAP_AFTER; |
| |
| continue; |
| } |
| |
| /* All good */ |
| break; |
| } |
| } else { |
| /* Normal mode, advance to the next fragment */ |
| if (gst_mpd_client_has_isoff_ondemand_profile (dashdemux->client)) { |
| if (gst_dash_demux_stream_advance_subfragment (stream)) |
| return GST_FLOW_OK; |
| } |
| |
| if (dashstream->adapter) |
| gst_adapter_clear (dashstream->adapter); |
| |
| gst_isoff_sidx_parser_clear (&dashstream->sidx_parser); |
| dashstream->sidx_base_offset = 0; |
| dashstream->sidx_position = GST_CLOCK_TIME_NONE; |
| dashstream->allow_sidx = TRUE; |
| |
| ret = gst_mpd_client_advance_segment (dashdemux->client, |
| dashstream->active_stream, stream->demux->segment.rate > 0.0); |
| } |
| return ret; |
| } |
| |
| static gboolean |
| gst_dash_demux_stream_select_bitrate (GstAdaptiveDemuxStream * stream, |
| guint64 bitrate) |
| { |
| GstActiveStream *active_stream = NULL; |
| GList *rep_list = NULL; |
| gint new_index; |
| GstAdaptiveDemux *base_demux = stream->demux; |
| 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; |
| } |
| |
| /* In key-frame trick mode don't change bitrates */ |
| if (GST_ADAPTIVE_DEMUX_IN_TRICKMODE_KEY_UNITS (demux)) { |
| GST_DEBUG_OBJECT (demux, "In key-frame trick mode, not changing bitrates"); |
| 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); |
| |
| if (active_stream->mimeType == GST_STREAM_VIDEO && demux->max_bitrate) { |
| bitrate = MIN (demux->max_bitrate, bitrate); |
| } |
| |
| /* get representation index with current max_bandwidth */ |
| if (GST_ADAPTIVE_DEMUX_IN_TRICKMODE_KEY_UNITS (base_demux) || |
| ABS (base_demux->segment.rate) <= 1.0) { |
| new_index = |
| gst_mpdparser_get_rep_idx_with_max_bandwidth (rep_list, bitrate, |
| demux->max_video_width, demux->max_video_height, |
| demux->max_video_framerate_n, demux->max_video_framerate_d); |
| } else { |
| new_index = |
| gst_mpdparser_get_rep_idx_with_max_bandwidth (rep_list, |
| bitrate / ABS (base_demux->segment.rate), demux->max_video_width, |
| demux->max_video_height, demux->max_video_framerate_n, |
| demux->max_video_framerate_d); |
| } |
| |
| /* 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 (ret) { |
| if (gst_mpd_client_has_isoff_ondemand_profile (demux->client) |
| && SIDX (dashstream)->entries) { |
| /* store our current position to change to the same one in a different |
| * representation if needed */ |
| if (SIDX (dashstream)->entry_index < SIDX (dashstream)->entries_count) |
| dashstream->sidx_position = SIDX_CURRENT_ENTRY (dashstream)->pts; |
| else if (SIDX (dashstream)->entry_index >= |
| SIDX (dashstream)->entries_count) |
| dashstream->sidx_position = |
| SIDX_ENTRY (dashstream, |
| SIDX (dashstream)->entries_count - 1)->pts + SIDX_ENTRY (dashstream, |
| SIDX (dashstream)->entries_count - 1)->duration; |
| else |
| dashstream->sidx_position = GST_CLOCK_TIME_NONE; |
| } else { |
| dashstream->sidx_position = GST_CLOCK_TIME_NONE; |
| } |
| |
| gst_isoff_sidx_parser_clear (&dashstream->sidx_parser); |
| dashstream->sidx_base_offset = 0; |
| dashstream->allow_sidx = TRUE; |
| |
| /* Reset ISOBMFF box parsing state */ |
| dashstream->isobmff_parser.current_fourcc = 0; |
| dashstream->isobmff_parser.current_start_offset = 0; |
| dashstream->isobmff_parser.current_size = 0; |
| |
| dashstream->current_offset = -1; |
| dashstream->current_index_header_or_data = 0; |
| |
| if (dashstream->adapter) |
| gst_adapter_clear (dashstream->adapter); |
| |
| if (dashstream->moof) |
| gst_isoff_moof_box_free (dashstream->moof); |
| dashstream->moof = NULL; |
| if (dashstream->moof_sync_samples) |
| g_array_free (dashstream->moof_sync_samples, TRUE); |
| dashstream->moof_sync_samples = NULL; |
| dashstream->current_sync_sample = -1; |
| dashstream->target_time = GST_CLOCK_TIME_NONE; |
| } |
| |
| end: |
| return ret; |
| } |
| |
| #define SEEK_UPDATES_PLAY_POSITION(r, start_type, stop_type) \ |
| ((r >= 0 && start_type != GST_SEEK_TYPE_NONE) || \ |
| (r < 0 && stop_type != GST_SEEK_TYPE_NONE)) |
| |
| 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, *streams = NULL; |
| GstDashDemux *dashdemux = GST_DASH_DEMUX_CAST (demux); |
| gboolean trickmode_no_audio; |
| |
| gst_event_parse_seek (seek, &rate, &format, &flags, &start_type, &start, |
| &stop_type, &stop); |
| |
| if (!SEEK_UPDATES_PLAY_POSITION (rate, start_type, stop_type)) { |
| /* nothing to do if we don't have to update the current position */ |
| return TRUE; |
| } |
| |
| if (demux->segment.rate > 0.0) { |
| target_pos = (GstClockTime) start; |
| } else { |
| target_pos = (GstClockTime) stop; |
| } |
| |
| /* select the requested Period in the Media Presentation */ |
| if (!gst_mpd_client_setup_media_presentation (dashdemux->client, target_pos, |
| -1, NULL)) |
| return FALSE; |
| |
| 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) start:%" |
| GST_TIME_FORMAT " - duration:%" |
| GST_TIME_FORMAT ") for position %" GST_TIME_FORMAT, |
| current_period, GST_TIME_ARGS (current_pos), |
| GST_TIME_ARGS (period->duration), GST_TIME_ARGS (target_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; |
| } |
| |
| trickmode_no_audio = ! !(flags & GST_SEEK_FLAG_TRICKMODE_NO_AUDIO); |
| |
| streams = demux->streams; |
| 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); |
| dashdemux->trickmode_no_audio = trickmode_no_audio; |
| |
| /* 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; |
| streams = demux->next_streams; |
| } else if (dashdemux->trickmode_no_audio != trickmode_no_audio) { |
| /* clean old active stream list, if any */ |
| gst_active_streams_free (dashdemux->client); |
| dashdemux->trickmode_no_audio = trickmode_no_audio; |
| |
| /* setup video, audio and subtitle streams, starting from the new Period */ |
| if (!gst_dash_demux_setup_all_streams (dashdemux)) |
| return FALSE; |
| streams = demux->next_streams; |
| } |
| |
| /* Update the current sequence on all streams */ |
| for (iter = streams; iter; iter = g_list_next (iter)) { |
| GstAdaptiveDemuxStream *stream = iter->data; |
| GstDashDemuxStream *dashstream = iter->data; |
| |
| dashstream->average_skip_size = 0; |
| if (gst_dash_demux_stream_seek (stream, rate >= 0, 0, target_pos, |
| NULL) != GST_FLOW_OK) |
| return FALSE; |
| } |
| |
| return TRUE; |
| } |
| |
| static gint64 |
| gst_dash_demux_get_manifest_update_interval (GstAdaptiveDemux * demux) |
| { |
| GstDashDemux *dashdemux = GST_DASH_DEMUX_CAST (demux); |
| return MIN (dashdemux->client->mpd_node->minimumUpdatePeriod * 1000, |
| SLOW_CLOCK_UPDATE_INTERVAL); |
| } |
| |
| 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 (); |
| gst_mpd_client_set_uri_downloader (new_client, demux->downloader); |
| 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; |
| GList *streams; |
| |
| /* 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, -1, |
| (period_id ? -1 : period_idx), period_id)) { |
| /* 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"); |
| gst_mpd_client_free (new_client); |
| gst_buffer_unmap (buffer, &mapinfo); |
| 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"); |
| gst_mpd_client_free (new_client); |
| gst_buffer_unmap (buffer, &mapinfo); |
| 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"); |
| gst_mpd_client_free (new_client); |
| gst_buffer_unmap (buffer, &mapinfo); |
| return GST_FLOW_ERROR; |
| } |
| |
| /* If no pads have been exposed yet, need to use those */ |
| streams = NULL; |
| if (demux->streams == NULL) { |
| if (demux->prepared_streams) { |
| streams = demux->prepared_streams; |
| } |
| } else { |
| streams = demux->streams; |
| } |
| |
| /* update the streams to play from the next segment */ |
| for (iter = 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); |
| gst_mpd_client_free (new_client); |
| gst_buffer_unmap (buffer, &mapinfo); |
| 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. |
| */ |
| |
| /* _get_next_fragment_timestamp() returned relative timestamp to |
| * corresponding period start, but _client_stream_seek expects absolute |
| * MPD time. */ |
| ts += gst_mpd_parser_get_period_start_time (dashdemux->client); |
| |
| 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, |
| demux->segment.rate >= 0, 0, ts, NULL); |
| } |
| |
| demux_stream->active_stream = new_stream; |
| } |
| |
| gst_mpd_client_free (dashdemux->client); |
| dashdemux->client = new_client; |
| |
| GST_DEBUG_OBJECT (demux, "Manifest file successfully updated"); |
| if (dashdemux->clock_drift) { |
| gst_dash_demux_poll_clock_drift (dashdemux); |
| } |
| } 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_mpd_client_free (new_client); |
| 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 *segmentAvailability; |
| GstActiveStream *active_stream = dashstream->active_stream; |
| |
| segmentAvailability = |
| gst_mpd_client_get_next_segment_availability_start_time |
| (dashdemux->client, active_stream); |
| |
| if (segmentAvailability) { |
| gint64 diff; |
| GstDateTime *cur_time; |
| |
| cur_time = |
| gst_date_time_new_from_g_date_time |
| (gst_adaptive_demux_get_client_now_utc (GST_ADAPTIVE_DEMUX_CAST |
| (dashdemux))); |
| diff = |
| gst_mpd_client_calculate_time_difference (cur_time, |
| segmentAvailability); |
| gst_date_time_unref (segmentAvailability); |
| gst_date_time_unref (cur_time); |
| /* subtract the server's clock drift, so that if the server's |
| time is behind our idea of UTC, we need to sleep for longer |
| before requesting a fragment */ |
| return diff - |
| gst_dash_demux_get_clock_compensation (dashdemux) * GST_USECOND; |
| } |
| 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); |
| |
| 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 gboolean |
| gst_dash_demux_stream_fragment_start (GstAdaptiveDemux * demux, |
| GstAdaptiveDemuxStream * stream) |
| { |
| GstDashDemux *dashdemux = GST_DASH_DEMUX_CAST (demux); |
| GstDashDemuxStream *dashstream = (GstDashDemuxStream *) stream; |
| |
| GST_LOG_OBJECT (stream->pad, "Actual position %" GST_TIME_FORMAT, |
| GST_TIME_ARGS (dashstream->actual_position)); |
| |
| dashstream->current_index_header_or_data = 0; |
| dashstream->current_offset = -1; |
| |
| /* We need to mark every first buffer of a key unit as discont, |
| * and also every first buffer of a moov and moof. This ensures |
| * that qtdemux takes note of our buffer offsets for each of those |
| * buffers instead of keeping track of them itself from the first |
| * buffer. We need offsets to be consistent between moof and mdat |
| */ |
| if (dashstream->is_isobmff && dashdemux->allow_trickmode_key_units |
| && GST_ADAPTIVE_DEMUX_IN_TRICKMODE_KEY_UNITS (demux) |
| && dashstream->active_stream->mimeType == GST_STREAM_VIDEO) |
| stream->discont = TRUE; |
| |
| return TRUE; |
| } |
| |
| static GstFlowReturn |
| gst_dash_demux_stream_fragment_finished (GstAdaptiveDemux * demux, |
| GstAdaptiveDemuxStream * stream) |
| { |
| GstDashDemux *dashdemux = GST_DASH_DEMUX_CAST (demux); |
| GstDashDemuxStream *dashstream = (GstDashDemuxStream *) stream; |
| |
| /* We need to mark every first buffer of a key unit as discont, |
| * and also every first buffer of a moov and moof. This ensures |
| * that qtdemux takes note of our buffer offsets for each of those |
| * buffers instead of keeping track of them itself from the first |
| * buffer. We need offsets to be consistent between moof and mdat |
| */ |
| if (dashstream->is_isobmff && dashdemux->allow_trickmode_key_units |
| && GST_ADAPTIVE_DEMUX_IN_TRICKMODE_KEY_UNITS (demux) |
| && dashstream->active_stream->mimeType == GST_STREAM_VIDEO) |
| stream->discont = TRUE; |
| |
| /* Only handle fragment advancing specifically for SIDX if we're not |
| * in key unit mode */ |
| if (!(dashstream->moof_sync_samples |
| && GST_ADAPTIVE_DEMUX_IN_TRICKMODE_KEY_UNITS (dashdemux)) |
| && 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 */ |
| if (dashstream->pending_seek_ts != GST_CLOCK_TIME_NONE) { |
| if (SIDX (dashstream)->entry_index < SIDX (dashstream)->entries_count) |
| return GST_FLOW_OK; |
| } else if (gst_dash_demux_stream_has_next_subfragment (stream)) { |
| return GST_FLOW_OK; |
| } |
| } |
| |
| 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 gboolean |
| gst_dash_demux_need_another_chunk (GstAdaptiveDemuxStream * stream) |
| { |
| GstDashDemux *dashdemux = (GstDashDemux *) stream->demux; |
| GstDashDemuxStream *dashstream = (GstDashDemuxStream *) stream; |
| |
| /* We're chunked downloading for ISOBMFF in KEY_UNITS mode for the actual |
| * fragment until we parsed the moof and arrived at the mdat. 8192 is a |
| * random guess for the moof size |
| */ |
| if (dashstream->is_isobmff |
| && GST_ADAPTIVE_DEMUX_IN_TRICKMODE_KEY_UNITS (stream->demux) |
| && dashstream->active_stream->mimeType == GST_STREAM_VIDEO |
| && !stream->downloading_header && !stream->downloading_index |
| && dashdemux->allow_trickmode_key_units) { |
| if (dashstream->isobmff_parser.current_fourcc != GST_ISOFF_FOURCC_MDAT) { |
| /* Need to download the moof first to know anything */ |
| |
| stream->fragment.chunk_size = 8192; |
| /* Do we have the first fourcc already or are we in the middle */ |
| if (dashstream->isobmff_parser.current_fourcc == 0) { |
| stream->fragment.chunk_size += dashstream->moof_average_size; |
| if (dashstream->first_sync_sample_always_after_moof) { |
| gboolean first = FALSE; |
| /* Check if we'll really need that first sample */ |
| if (GST_CLOCK_TIME_IS_VALID (dashstream->target_time)) { |
| first = |
| ((dashstream->target_time - |
| dashstream->current_fragment_timestamp) / |
| dashstream->keyframe_average_distance) == 0 ? TRUE : FALSE; |
| } else if (stream->segment.rate > 0) { |
| first = TRUE; |
| } |
| |
| if (first) |
| stream->fragment.chunk_size += dashstream->keyframe_average_size; |
| } |
| } |
| |
| if (gst_mpd_client_has_isoff_ondemand_profile (dashdemux->client) && |
| dashstream->sidx_parser.sidx.entries) { |
| guint64 sidx_start_offset = |
| dashstream->sidx_base_offset + |
| SIDX_CURRENT_ENTRY (dashstream)->offset; |
| guint64 sidx_end_offset = |
| sidx_start_offset + SIDX_CURRENT_ENTRY (dashstream)->size; |
| guint64 downloaded_end_offset; |
| |
| if (dashstream->current_offset == GST_CLOCK_TIME_NONE) { |
| downloaded_end_offset = sidx_start_offset; |
| } else { |
| downloaded_end_offset = |
| dashstream->current_offset + |
| gst_adapter_available (dashstream->adapter); |
| } |
| |
| downloaded_end_offset = MAX (downloaded_end_offset, sidx_start_offset); |
| |
| if (stream->fragment.chunk_size + |
| downloaded_end_offset > sidx_end_offset) { |
| stream->fragment.chunk_size = sidx_end_offset - downloaded_end_offset; |
| } |
| } |
| } else if (dashstream->moof && dashstream->moof_sync_samples) { |
| /* Have the moof, either we're done now or we want to download the |
| * directly following sync sample */ |
| if (dashstream->first_sync_sample_after_moof |
| && dashstream->current_sync_sample == 0) { |
| GstDashStreamSyncSample *sync_sample = |
| &g_array_index (dashstream->moof_sync_samples, |
| GstDashStreamSyncSample, 0); |
| guint64 end_offset = sync_sample->end_offset + 1; |
| guint64 downloaded_end_offset; |
| |
| downloaded_end_offset = |
| dashstream->current_offset + |
| gst_adapter_available (dashstream->adapter); |
| |
| if (gst_mpd_client_has_isoff_ondemand_profile (dashdemux->client) && |
| dashstream->sidx_parser.sidx.entries) { |
| guint64 sidx_end_offset = |
| dashstream->sidx_base_offset + |
| SIDX_CURRENT_ENTRY (dashstream)->offset + |
| SIDX_CURRENT_ENTRY (dashstream)->size; |
| |
| if (end_offset > sidx_end_offset) { |
| end_offset = sidx_end_offset; |
| } |
| } |
| |
| if (downloaded_end_offset < end_offset) { |
| stream->fragment.chunk_size = end_offset - downloaded_end_offset; |
| } else { |
| stream->fragment.chunk_size = 0; |
| } |
| } else { |
| stream->fragment.chunk_size = 0; |
| } |
| } else { |
| /* Have moof but can't do key-units mode, just download until the end */ |
| stream->fragment.chunk_size = -1; |
| } |
| } else { |
| /* We might've decided that we can't allow key-unit only |
| * trickmodes while doing chunked downloading. In that case |
| * just download from here to the end now */ |
| if (dashstream->moof |
| && GST_ADAPTIVE_DEMUX_IN_TRICKMODE_KEY_UNITS (stream->demux)) { |
| stream->fragment.chunk_size = -1; |
| } else { |
| stream->fragment.chunk_size = 0; |
| } |
| } |
| |
| return stream->fragment.chunk_size != 0; |
| } |
| |
| static GstFlowReturn |
| gst_dash_demux_parse_isobmff (GstAdaptiveDemux * demux, |
| GstDashDemuxStream * dash_stream, gboolean * sidx_seek_needed) |
| { |
| GstAdaptiveDemuxStream *stream = (GstAdaptiveDemuxStream *) dash_stream; |
| GstDashDemux *dashdemux = GST_DASH_DEMUX_CAST (demux); |
| gsize available; |
| GstBuffer *buffer; |
| GstMapInfo map; |
| GstByteReader reader; |
| guint32 fourcc; |
| guint header_size; |
| guint64 size, buffer_offset; |
| |
| *sidx_seek_needed = FALSE; |
| |
| /* This must not be called when we're in the mdat. We only look at the mdat |
| * header and then stop parsing the boxes as we're only interested in the |
| * metadata! Handling mdat is the job of the surrounding code, as well as |
| * stopping or starting the next fragment when mdat is over (=> sidx) |
| */ |
| g_assert (dash_stream->isobmff_parser.current_fourcc != |
| GST_ISOFF_FOURCC_MDAT); |
| |
| available = gst_adapter_available (dash_stream->adapter); |
| buffer = gst_adapter_take_buffer (dash_stream->adapter, available); |
| buffer_offset = dash_stream->current_offset; |
| |
| /* Always at the start of a box here */ |
| g_assert (dash_stream->isobmff_parser.current_size == 0); |
| |
| /* At the start of a box => Parse it */ |
| gst_buffer_map (buffer, &map, GST_MAP_READ); |
| gst_byte_reader_init (&reader, map.data, map.size); |
| |
| /* While there are more boxes left to parse ... */ |
| dash_stream->isobmff_parser.current_start_offset = buffer_offset; |
| do { |
| dash_stream->isobmff_parser.current_fourcc = 0; |
| dash_stream->isobmff_parser.current_size = 0; |
| |
| if (!gst_isoff_parse_box_header (&reader, &fourcc, NULL, &header_size, |
| &size)) { |
| break; |
| } |
| |
| dash_stream->isobmff_parser.current_fourcc = fourcc; |
| if (size == 0) { |
| /* We assume this is mdat, anything else with "size until end" |
| * does not seem to make sense */ |
| g_assert (dash_stream->isobmff_parser.current_fourcc == |
| GST_ISOFF_FOURCC_MDAT); |
| dash_stream->isobmff_parser.current_size = -1; |
| break; |
| } |
| |
| dash_stream->isobmff_parser.current_size = size; |
| |
| /* Do we have the complete box or are at MDAT */ |
| if (gst_byte_reader_get_remaining (&reader) < size - header_size || |
| dash_stream->isobmff_parser.current_fourcc == GST_ISOFF_FOURCC_MDAT) { |
| /* Reset byte reader to the beginning of the box */ |
| gst_byte_reader_set_pos (&reader, |
| gst_byte_reader_get_pos (&reader) - header_size); |
| break; |
| } |
| |
| GST_LOG_OBJECT (stream->pad, |
| "box %" GST_FOURCC_FORMAT " at offset %" G_GUINT64_FORMAT " size %" |
| G_GUINT64_FORMAT, GST_FOURCC_ARGS (fourcc), |
| dash_stream->isobmff_parser.current_start_offset, size); |
| |
| if (dash_stream->isobmff_parser.current_fourcc == GST_ISOFF_FOURCC_MOOF) { |
| GstByteReader sub_reader; |
| |
| /* Only allow SIDX before the very first moof */ |
| dash_stream->allow_sidx = FALSE; |
| |
| g_assert (dash_stream->moof == NULL); |
| g_assert (dash_stream->moof_sync_samples == NULL); |
| gst_byte_reader_get_sub_reader (&reader, &sub_reader, size - header_size); |
| dash_stream->moof = gst_isoff_moof_box_parse (&sub_reader); |
| dash_stream->moof_offset = |
| dash_stream->isobmff_parser.current_start_offset; |
| dash_stream->moof_size = size; |
| dash_stream->current_sync_sample = -1; |
| |
| if (dash_stream->moof_average_size) { |
| if (dash_stream->moof_average_size < size) |
| dash_stream->moof_average_size = |
| (size * 3 + dash_stream->moof_average_size) / 4; |
| else |
| dash_stream->moof_average_size = |
| (size + dash_stream->moof_average_size + 3) / 4; |
| } else { |
| dash_stream->moof_average_size = size; |
| } |
| } else if (dash_stream->isobmff_parser.current_fourcc == |
| GST_ISOFF_FOURCC_SIDX && |
| gst_mpd_client_has_isoff_ondemand_profile (dashdemux->client) && |
| dash_stream->allow_sidx) { |
| GstByteReader sub_reader; |
| GstIsoffParserResult res; |
| guint dummy; |
| |
| dash_stream->sidx_base_offset = |
| dash_stream->isobmff_parser.current_start_offset + size; |
| dash_stream->allow_sidx = FALSE; |
| |
| gst_byte_reader_get_sub_reader (&reader, &sub_reader, size - header_size); |
| |
| res = |
| gst_isoff_sidx_parser_parse (&dash_stream->sidx_parser, &sub_reader, |
| &dummy); |
| |
| if (res == GST_ISOFF_PARSER_DONE) { |
| guint64 first_offset = dash_stream->sidx_parser.sidx.first_offset; |
| GstSidxBox *sidx = SIDX (dash_stream); |
| guint i; |
| |
| if (first_offset) { |
| GST_LOG_OBJECT (stream->pad, |
| "non-zero sidx first offset %" G_GUINT64_FORMAT, first_offset); |
| dash_stream->sidx_base_offset += first_offset; |
| } |
| |
| for (i = 0; i < sidx->entries_count; i++) { |
| GstSidxBoxEntry *entry = &sidx->entries[i]; |
| |
| if (entry->ref_type != 0) { |
| GST_FIXME_OBJECT (stream->pad, "SIDX ref_type 1 not supported yet"); |
| dash_stream->sidx_position = GST_CLOCK_TIME_NONE; |
| gst_isoff_sidx_parser_clear (&dash_stream->sidx_parser); |
| break; |
| } |
| } |
| |
| /* We might've cleared the index above */ |
| if (sidx->entries_count > 0) { |
| if (GST_CLOCK_TIME_IS_VALID (dash_stream->pending_seek_ts)) { |
| /* FIXME, preserve seek flags */ |
| if (gst_dash_demux_stream_sidx_seek (dash_stream, |
| demux->segment.rate >= 0, 0, dash_stream->pending_seek_ts, |
| NULL) != GST_FLOW_OK) { |
| GST_ERROR_OBJECT (stream->pad, "Couldn't find position in sidx"); |
| dash_stream->sidx_position = GST_CLOCK_TIME_NONE; |
| gst_isoff_sidx_parser_clear (&dash_stream->sidx_parser); |
| } |
| dash_stream->pending_seek_ts = GST_CLOCK_TIME_NONE; |
| } else { |
| |
| if (dash_stream->sidx_position == GST_CLOCK_TIME_NONE) { |
| SIDX (dash_stream)->entry_index = 0; |
| } else { |
| if (gst_dash_demux_stream_sidx_seek (dash_stream, |
| demux->segment.rate >= 0, GST_SEEK_FLAG_SNAP_BEFORE, |
| dash_stream->sidx_position, NULL) != GST_FLOW_OK) { |
| GST_ERROR_OBJECT (stream->pad, |
| "Couldn't find position in sidx"); |
| dash_stream->sidx_position = GST_CLOCK_TIME_NONE; |
| gst_isoff_sidx_parser_clear (&dash_stream->sidx_parser); |
| } |
| } |
| dash_stream->sidx_position = |
| SIDX (dash_stream)->entries[SIDX (dash_stream)-> |
| entry_index].pts; |
| } |
| } |
| |
| if (dash_stream->sidx_parser.status == GST_ISOFF_SIDX_PARSER_FINISHED && |
| SIDX (dash_stream)->entry_index != 0) { |
| /* Need to jump to the requested SIDX entry. Push everything up to |
| * the SIDX box below and let the caller handle everything else */ |
| *sidx_seek_needed = TRUE; |
| break; |
| } |
| } |
| } else { |
| gst_byte_reader_skip (&reader, size - header_size); |
| } |
| |
| dash_stream->isobmff_parser.current_fourcc = 0; |
| dash_stream->isobmff_parser.current_start_offset += size; |
| dash_stream->isobmff_parser.current_size = 0; |
| } while (gst_byte_reader_get_remaining (&reader) > 0); |
| |
| gst_buffer_unmap (buffer, &map); |
| |
| /* mdat? Push all we have and wait for it to be over */ |
| if (dash_stream->isobmff_parser.current_fourcc == GST_ISOFF_FOURCC_MDAT) { |
| GstBuffer *pending; |
| |
| GST_LOG_OBJECT (stream->pad, |
| "box %" GST_FOURCC_FORMAT " at offset %" G_GUINT64_FORMAT " size %" |
| G_GUINT64_FORMAT, GST_FOURCC_ARGS (fourcc), |
| dash_stream->isobmff_parser.current_start_offset, |
| dash_stream->isobmff_parser.current_size); |
| |
| /* At mdat. Move the start of the mdat to the adapter and have everything |
| * else be pushed. We parsed all header boxes at this point and are not |
| * supposed to be called again until the next moof */ |
| pending = _gst_buffer_split (buffer, gst_byte_reader_get_pos (&reader), -1); |
| gst_adapter_push (dash_stream->adapter, pending); |
| dash_stream->current_offset += gst_byte_reader_get_pos (&reader); |
| dash_stream->isobmff_parser.current_size = 0; |
| |
| GST_BUFFER_OFFSET (buffer) = buffer_offset; |
| GST_BUFFER_OFFSET_END (buffer) = |
| buffer_offset + gst_buffer_get_size (buffer); |
| return gst_adaptive_demux_stream_push_buffer (stream, buffer); |
| } else if (gst_byte_reader_get_pos (&reader) != 0) { |
| GstBuffer *pending; |
| |
| /* Multiple complete boxes and no mdat? Push them and keep the remainder, |
| * which is the start of the next box if any remainder */ |
| |
| pending = _gst_buffer_split (buffer, gst_byte_reader_get_pos (&reader), -1); |
| gst_adapter_push (dash_stream->adapter, pending); |
| dash_stream->current_offset += gst_byte_reader_get_pos (&reader); |
| dash_stream->isobmff_parser.current_size = 0; |
| |
| GST_BUFFER_OFFSET (buffer) = buffer_offset; |
| GST_BUFFER_OFFSET_END (buffer) = |
| buffer_offset + gst_buffer_get_size (buffer); |
| return gst_adaptive_demux_stream_push_buffer (stream, buffer); |
| } |
| |
| /* Not even a single complete, non-mdat box, wait */ |
| dash_stream->isobmff_parser.current_size = 0; |
| gst_adapter_push (dash_stream->adapter, buffer); |
| |
| return GST_FLOW_OK; |
| } |
| |
| static gboolean |
| gst_dash_demux_find_sync_samples (GstAdaptiveDemux * demux, |
| GstAdaptiveDemuxStream * stream) |
| { |
| GstDashDemux *dashdemux = (GstDashDemux *) stream->demux; |
| GstDashDemuxStream *dash_stream = (GstDashDemuxStream *) stream; |
| guint i; |
| guint32 track_id = 0; |
| guint64 prev_traf_end; |
| gboolean trex_sample_flags = FALSE; |
| |
| if (!dash_stream->moof) { |
| dashdemux->allow_trickmode_key_units = FALSE; |
| return FALSE; |
| } |
| |
| dash_stream->current_sync_sample = -1; |
| dash_stream->moof_sync_samples = |
| g_array_new (FALSE, FALSE, sizeof (GstDashStreamSyncSample)); |
| |
| prev_traf_end = dash_stream->moof_offset; |
| |
| /* generate table of keyframes and offsets */ |
| for (i = 0; i < dash_stream->moof->traf->len; i++) { |
| GstTrafBox *traf = &g_array_index (dash_stream->moof->traf, GstTrafBox, i); |
| guint64 traf_offset = 0, prev_trun_end; |
| guint j; |
| |
| if (i == 0) { |
| track_id = traf->tfhd.track_id; |
| } else if (track_id != traf->tfhd.track_id) { |
| GST_ERROR_OBJECT (stream->pad, |
| "moof with trafs of different track ids (%u != %u)", track_id, |
| traf->tfhd.track_id); |
| g_array_free (dash_stream->moof_sync_samples, TRUE); |
| dash_stream->moof_sync_samples = NULL; |
| dashdemux->allow_trickmode_key_units = FALSE; |
| return FALSE; |
| } |
| |
| if (traf->tfhd.flags & GST_TFHD_FLAGS_BASE_DATA_OFFSET_PRESENT) { |
| traf_offset = traf->tfhd.base_data_offset; |
| } else if (traf->tfhd.flags & GST_TFHD_FLAGS_DEFAULT_BASE_IS_MOOF) { |
| traf_offset = dash_stream->moof_offset; |
| } else { |
| traf_offset = prev_traf_end; |
| } |
| |
| prev_trun_end = traf_offset; |
| |
| for (j = 0; j < traf->trun->len; j++) { |
| GstTrunBox *trun = &g_array_index (traf->trun, GstTrunBox, j); |
| guint64 trun_offset, prev_sample_end; |
| guint k; |
| |
| if (trun->flags & GST_TRUN_FLAGS_DATA_OFFSET_PRESENT) { |
| trun_offset = traf_offset + trun->data_offset; |
| } else { |
| trun_offset = prev_trun_end; |
| } |
| |
| prev_sample_end = trun_offset; |
| for (k = 0; k < trun->samples->len; k++) { |
| GstTrunSample *sample = |
| &g_array_index (trun->samples, GstTrunSample, k); |
| guint64 sample_offset; |
| guint32 sample_flags; |
| #if 0 |
| guint32 sample_duration; |
| #endif |
| |
| sample_offset = prev_sample_end; |
| |
| if (trun->flags & GST_TRUN_FLAGS_SAMPLE_FLAGS_PRESENT) { |
| sample_flags = sample->sample_flags; |
| } else if ((trun->flags & GST_TRUN_FLAGS_FIRST_SAMPLE_FLAGS_PRESENT) |
| && k == 0) { |
| sample_flags = trun->first_sample_flags; |
| } else if (traf-> |
| tfhd.flags & GST_TFHD_FLAGS_DEFAULT_SAMPLE_FLAGS_PRESENT) { |
| sample_flags = traf->tfhd.default_sample_flags; |
| } else { |
| trex_sample_flags = TRUE; |
| continue; |
| } |
| |
| #if 0 |
| if (trun->flags & GST_TRUN_FLAGS_SAMPLE_DURATION_PRESENT) { |
| sample_duration = sample->sample_duration; |
| } else if (traf-> |
| tfhd.flags & GST_TFHD_FLAGS_DEFAULT_SAMPLE_DURATION_PRESENT) { |
| sample_duration = traf->tfhd.default_sample_duration; |
| } else { |
| GST_FIXME_OBJECT (stream->pad, |
| "Sample duration given by trex - can't download only keyframes"); |
| g_array_free (dash_stream->moof_sync_samples, TRUE); |
| dash_stream->moof_sync_samples = NULL; |
| return FALSE; |
| } |
| #endif |
| |
| if (trun->flags & GST_TRUN_FLAGS_SAMPLE_SIZE_PRESENT) { |
| prev_sample_end += sample->sample_size; |
| } else if (traf-> |
| tfhd.flags & GST_TFHD_FLAGS_DEFAULT_SAMPLE_SIZE_PRESENT) { |
| prev_sample_end += traf->tfhd.default_sample_size; |
| } else { |
| GST_FIXME_OBJECT (stream->pad, |
| "Sample size given by trex - can't download only keyframes"); |
| g_array_free (dash_stream->moof_sync_samples, TRUE); |
| dash_stream->moof_sync_samples = NULL; |
| dashdemux->allow_trickmode_key_units = FALSE; |
| return FALSE; |
| } |
| |
| /* Non-non-sync sample aka sync sample */ |
| if (!GST_ISOFF_SAMPLE_FLAGS_SAMPLE_IS_NON_SYNC_SAMPLE (sample_flags) || |
| GST_ISOFF_SAMPLE_FLAGS_SAMPLE_DEPENDS_ON (sample_flags) == 2) { |
| GstDashStreamSyncSample sync_sample = |
| { sample_offset, prev_sample_end - 1 }; |
| /* TODO: need timestamps so we can decide to download or not */ |
| g_array_append_val (dash_stream->moof_sync_samples, sync_sample); |
| } |
| } |
| |
| prev_trun_end = prev_sample_end; |
| } |
| |
| prev_traf_end = prev_trun_end; |
| } |
| |
| if (trex_sample_flags) { |
| if (dash_stream->moof_sync_samples->len > 0) { |
| GST_LOG_OBJECT (stream->pad, |
| "Some sample flags given by trex but still found sync samples"); |
| } else { |
| GST_FIXME_OBJECT (stream->pad, |
| "Sample flags given by trex - can't download only keyframes"); |
| g_array_free (dash_stream->moof_sync_samples, TRUE); |
| dash_stream->moof_sync_samples = NULL; |
| dashdemux->allow_trickmode_key_units = FALSE; |
| return FALSE; |
| } |
| } |
| |
| if (dash_stream->moof_sync_samples->len == 0) { |
| GST_LOG_OBJECT (stream->pad, "No sync samples found in fragment"); |
| g_array_free (dash_stream->moof_sync_samples, TRUE); |
| dash_stream->moof_sync_samples = NULL; |
| dashdemux->allow_trickmode_key_units = FALSE; |
| return FALSE; |
| } |
| |
| { |
| GstDashStreamSyncSample *sync_sample; |
| guint i; |
| guint size; |
| GstClockTime current_keyframe_distance; |
| |
| for (i = 0; i < dash_stream->moof_sync_samples->len; i++) { |
| sync_sample = |
| &g_array_index (dash_stream->moof_sync_samples, |
| GstDashStreamSyncSample, i); |
| size = sync_sample->end_offset + 1 - sync_sample->start_offset; |
| |
| if (dash_stream->keyframe_average_size) { |
| /* Over-estimate the keyframe size */ |
| if (dash_stream->keyframe_average_size < size) |
| dash_stream->keyframe_average_size = |
| (size * 3 + dash_stream->keyframe_average_size) / 4; |
| else |
| dash_stream->keyframe_average_size = |
| (size + dash_stream->keyframe_average_size * 3) / 4; |
| } else { |
| dash_stream->keyframe_average_size = size; |
| } |
| |
| if (i == 0) { |
| if (dash_stream->moof_offset + dash_stream->moof_size + 8 < |
| sync_sample->start_offset) { |
| dash_stream->first_sync_sample_after_moof = FALSE; |
| dash_stream->first_sync_sample_always_after_moof = FALSE; |
| } else { |
| dash_stream->first_sync_sample_after_moof = |
| (dash_stream->moof_sync_samples->len == 1 |
| || demux->segment.rate > 0.0); |
| } |
| } |
| } |
| |
| g_assert (stream->fragment.duration != 0); |
| g_assert (stream->fragment.duration != GST_CLOCK_TIME_NONE); |
| |
| if (gst_mpd_client_has_isoff_ondemand_profile (dashdemux->client) |
| && dash_stream->sidx_position != GST_CLOCK_TIME_NONE |
| && SIDX (dash_stream)->entries) { |
| GstSidxBoxEntry *entry = SIDX_CURRENT_ENTRY (dash_stream); |
| current_keyframe_distance = |
| entry->duration / dash_stream->moof_sync_samples->len; |
| } else { |
| current_keyframe_distance = |
| stream->fragment.duration / dash_stream->moof_sync_samples->len; |
| } |
| dash_stream->current_fragment_keyframe_distance = current_keyframe_distance; |
| |
| if (dash_stream->keyframe_average_distance) { |
| /* Under-estimate the keyframe distance */ |
| if (dash_stream->keyframe_average_distance > current_keyframe_distance) |
| dash_stream->keyframe_average_distance = |
| (dash_stream->keyframe_average_distance * 3 + |
| current_keyframe_distance) / 4; |
| else |
| dash_stream->keyframe_average_distance = |
| (dash_stream->keyframe_average_distance + |
| current_keyframe_distance * 3) / 4; |
| } else { |
| dash_stream->keyframe_average_distance = current_keyframe_distance; |
| } |
| |
| GST_DEBUG_OBJECT (stream->pad, |
| "average keyframe sample size: %" G_GUINT64_FORMAT, |
| dash_stream->keyframe_average_size); |
| GST_DEBUG_OBJECT (stream->pad, |
| "average keyframe distance: %" GST_TIME_FORMAT " (%" GST_TIME_FORMAT |
| ")", GST_TIME_ARGS (dash_stream->keyframe_average_distance), |
| GST_TIME_ARGS (current_keyframe_distance)); |
| GST_DEBUG_OBJECT (stream->pad, "first sync sample after moof: %d", |
| dash_stream->first_sync_sample_after_moof); |
| } |
| |
| return TRUE; |
| } |
| |
| |
| static GstFlowReturn |
| gst_dash_demux_handle_isobmff (GstAdaptiveDemux * demux, |
| GstAdaptiveDemuxStream * stream) |
| { |
| GstDashDemuxStream *dash_stream = (GstDashDemuxStream *) stream; |
| GstFlowReturn ret = GST_FLOW_OK; |
| GstBuffer *buffer; |
| gboolean sidx_advance = FALSE; |
| |
| /* We parse all ISOBMFF boxes of a (sub)fragment until the mdat. This covers |
| * at least moov, moof and sidx boxes. Once mdat is received we just output |
| * everything until the next (sub)fragment */ |
| if (dash_stream->isobmff_parser.current_fourcc != GST_ISOFF_FOURCC_MDAT) { |
| gboolean sidx_seek_needed = FALSE; |
| |
| ret = gst_dash_demux_parse_isobmff (demux, dash_stream, &sidx_seek_needed); |
| if (ret != GST_FLOW_OK) |
| return ret; |
| |
| /* Go to selected segment if needed here */ |
| if (sidx_seek_needed && !stream->downloading_index) |
| return GST_ADAPTIVE_DEMUX_FLOW_END_OF_FRAGMENT; |
| |
| /* No mdat yet, let's get called again with the next boxes */ |
| if (dash_stream->isobmff_parser.current_fourcc != GST_ISOFF_FOURCC_MDAT) |
| return ret; |
| |
| /* Here we end up only if we're right at the mdat start */ |
| |
| /* Jump to the next sync sample. As we're doing chunked downloading |
| * here, just drop data until our chunk is over so we can reuse the |
| * HTTP connection instead of having to create a new one or |
| * reuse the data if the sync sample follows the moof */ |
| if (dash_stream->active_stream->mimeType == GST_STREAM_VIDEO |
| && gst_dash_demux_find_sync_samples (demux, stream) && |
| GST_ADAPTIVE_DEMUX_IN_TRICKMODE_KEY_UNITS (stream->demux)) { |
| guint idx = -1; |
| |
| if (GST_CLOCK_TIME_IS_VALID (dash_stream->target_time)) { |
| idx = |
| (dash_stream->target_time - |
| dash_stream->current_fragment_timestamp) / |
| dash_stream->current_fragment_keyframe_distance; |
| } else if (stream->segment.rate > 0) { |
| idx = 0; |
| } |
| |
| GST_DEBUG_OBJECT (stream->pad, "target %" GST_TIME_FORMAT " idx %d", |
| GST_TIME_ARGS (dash_stream->target_time), idx); |
| /* Figure out target time */ |
| |
| if (dash_stream->first_sync_sample_after_moof && idx == 0) { |
| /* If we're here, don't throw away data but collect sync |
| * sample while we're at it below. We're doing chunked |
| * downloading so might need to adjust the next chunk size for |
| * the remainder */ |
| dash_stream->current_sync_sample = 0; |
| GST_DEBUG_OBJECT (stream->pad, "Using first keyframe after header"); |
| } |
| } |
| |
| if (gst_adapter_available (dash_stream->adapter) == 0) |
| return ret; |
| |
| /* We have some data from the mdat available in the adapter, handle it |
| * below in the push code */ |
| } else { |
| /* Somewhere in the middle of the mdat */ |
| } |
| |
| /* At mdat */ |
| if (dash_stream->sidx_parser.status == GST_ISOFF_SIDX_PARSER_FINISHED) { |
| guint64 sidx_end_offset = |
| dash_stream->sidx_base_offset + |
| SIDX_CURRENT_ENTRY (dash_stream)->offset + |
| SIDX_CURRENT_ENTRY (dash_stream)->size; |
| gboolean has_next = gst_dash_demux_stream_has_next_subfragment (stream); |
| gsize available; |
| |
| /* Need to handle everything in the adapter according to the parsed SIDX |
| * and advance subsegments accordingly */ |
| |
| available = gst_adapter_available (dash_stream->adapter); |
| if (dash_stream->current_offset + available < sidx_end_offset) { |
| buffer = gst_adapter_take_buffer (dash_stream->adapter, available); |
| } else { |
| if (!has_next && sidx_end_offset <= dash_stream->current_offset) { |
| /* Drain all bytes, since there might be trailing bytes at the end of subfragment */ |
| buffer = gst_adapter_take_buffer (dash_stream->adapter, available); |
| } else { |
| if (sidx_end_offset <= dash_stream->current_offset) { |
| /* This means a corrupted stream or a bug: ignoring bugs, it |
| * should only happen if the SIDX index is corrupt */ |
| GST_ERROR_OBJECT (stream->pad, "Invalid SIDX state"); |
| gst_adapter_clear (dash_stream->adapter); |
| return GST_FLOW_ERROR; |
| } else { |
| buffer = |
| gst_adapter_take_buffer (dash_stream->adapter, |
| sidx_end_offset - dash_stream->current_offset); |
| sidx_advance = TRUE; |
| } |
| } |
| } |
| } else { |
| /* Take it all and handle it further below */ |
| buffer = |
| gst_adapter_take_buffer (dash_stream->adapter, |
| gst_adapter_available (dash_stream->adapter)); |
| |
| /* Attention: All code paths below need to update dash_stream->current_offset */ |
| } |
| |
| /* We're actually running in key-units trick mode */ |
| if (dash_stream->active_stream->mimeType == GST_STREAM_VIDEO |
| && dash_stream->moof_sync_samples |
| && GST_ADAPTIVE_DEMUX_IN_TRICKMODE_KEY_UNITS (stream->demux)) { |
| if (dash_stream->current_sync_sample == -1) { |
| /* We're doing chunked downloading and wait for finishing the current |
| * chunk so we can jump to the first keyframe */ |
| dash_stream->current_offset += gst_buffer_get_size (buffer); |
| gst_buffer_unref (buffer); |
| return GST_FLOW_OK; |
| } else { |
| GstDashStreamSyncSample *sync_sample = |
| &g_array_index (dash_stream->moof_sync_samples, |
| GstDashStreamSyncSample, dash_stream->current_sync_sample); |
| guint64 end_offset = |
| dash_stream->current_offset + gst_buffer_get_size (buffer); |
| |
| /* Make sure to not download too much, this should only happen for |
| * the very first keyframe if it follows the moof */ |
| if (dash_stream->current_offset >= sync_sample->end_offset + 1) { |
| dash_stream->current_offset += gst_buffer_get_size (buffer); |
| gst_buffer_unref (buffer); |
| return GST_FLOW_OK; |
| } else if (end_offset > sync_sample->end_offset + 1) { |
| guint64 remaining = |
| sync_sample->end_offset + 1 - dash_stream->current_offset; |
| GstBuffer *sub = gst_buffer_copy_region (buffer, GST_BUFFER_COPY_ALL, 0, |
| remaining); |
| gst_buffer_unref (buffer); |
| buffer = sub; |
| } |
| } |
| } |
| |
| GST_BUFFER_OFFSET (buffer) = dash_stream->current_offset; |
| dash_stream->current_offset += gst_buffer_get_size (buffer); |
| GST_BUFFER_OFFSET_END (buffer) = dash_stream->current_offset; |
| |
| ret = gst_adaptive_demux_stream_push_buffer (stream, buffer); |
| if (ret != GST_FLOW_OK) |
| return ret; |
| |
| if (sidx_advance) { |
| ret = |
| gst_adaptive_demux_stream_advance_fragment (demux, stream, |
| SIDX_CURRENT_ENTRY (dash_stream)->duration); |
| if (ret != GST_FLOW_OK) |
| return ret; |
| |
| /* If we still have data available, recurse and use it up if possible */ |
| if (gst_adapter_available (dash_stream->adapter) > 0) |
| return gst_dash_demux_handle_isobmff (demux, stream); |
| } |
| |
| return ret; |
| } |
| |
| static GstFlowReturn |
| gst_dash_demux_data_received (GstAdaptiveDemux * demux, |
| GstAdaptiveDemuxStream * stream, GstBuffer * buffer) |
| { |
| GstDashDemuxStream *dash_stream = (GstDashDemuxStream *) stream; |
| GstFlowReturn ret = GST_FLOW_OK; |
| guint index_header_or_data; |
| |
| if (stream->downloading_index) |
| index_header_or_data = 1; |
| else if (stream->downloading_header) |
| index_header_or_data = 2; |
| else |
| index_header_or_data = 3; |
| |
| if (dash_stream->current_index_header_or_data != index_header_or_data) { |
| /* Clear pending data */ |
| if (gst_adapter_available (dash_stream->adapter) != 0) |
| GST_ERROR_OBJECT (stream->pad, |
| "Had pending SIDX data after switch between index/header/data"); |
| gst_adapter_clear (dash_stream->adapter); |
| dash_stream->current_index_header_or_data = index_header_or_data; |
| dash_stream->current_offset = -1; |
| } |
| |
| if (dash_stream->current_offset == -1) |
| dash_stream->current_offset = |
| GST_BUFFER_OFFSET_IS_VALID (buffer) ? GST_BUFFER_OFFSET (buffer) : 0; |
| |
| gst_adapter_push (dash_stream->adapter, buffer); |
| buffer = NULL; |
| |
| if (dash_stream->is_isobmff || stream->downloading_index) { |
| /* SIDX index is also ISOBMMF */ |
| ret = gst_dash_demux_handle_isobmff (demux, stream); |
| } else if (dash_stream->sidx_parser.status == GST_ISOFF_SIDX_PARSER_FINISHED) { |
| gsize available; |
| |
| /* Not ISOBMFF but had a SIDX index. Does this even exist or work? */ |
| while (ret == GST_FLOW_OK |
| && ((available = gst_adapter_available (dash_stream->adapter)) > 0)) { |
| gboolean advance = FALSE; |
| guint64 sidx_end_offset = |
| dash_stream->sidx_base_offset + |
| SIDX_CURRENT_ENTRY (dash_stream)->offset + |
| SIDX_CURRENT_ENTRY (dash_stream)->size; |
| gboolean has_next = gst_dash_demux_stream_has_next_subfragment (stream); |
| |
| if (dash_stream->current_offset + available < sidx_end_offset) { |
| buffer = gst_adapter_take_buffer (dash_stream->adapter, available); |
| } else { |
| if (!has_next && sidx_end_offset <= dash_stream->current_offset) { |
| /* Drain all bytes, since there might be trailing bytes at the end of subfragment */ |
| buffer = gst_adapter_take_buffer (dash_stream->adapter, available); |
| } else { |
| if (sidx_end_offset <= dash_stream->current_offset) { |
| /* This means a corrupted stream or a bug: ignoring bugs, it |
| * should only happen if the SIDX index is corrupt */ |
| GST_ERROR_OBJECT (stream->pad, "Invalid SIDX state"); |
| gst_adapter_clear (dash_stream->adapter); |
| ret = GST_FLOW_ERROR; |
| break; |
| } else { |
| buffer = |
| gst_adapter_take_buffer (dash_stream->adapter, |
| sidx_end_offset - dash_stream->current_offset); |
| advance = TRUE; |
| } |
| } |
| } |
| |
| GST_BUFFER_OFFSET (buffer) = dash_stream->current_offset; |
| GST_BUFFER_OFFSET_END (buffer) = |
| GST_BUFFER_OFFSET (buffer) + gst_buffer_get_size (buffer); |
| dash_stream->current_offset = GST_BUFFER_OFFSET_END (buffer); |
| |
| ret = gst_adaptive_demux_stream_push_buffer (stream, buffer); |
| |
| if (advance) { |
| if (has_next) { |
| 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 { |
| break; |
| } |
| } |
| } |
| } else { |
| /* this should be the main header, just push it all */ |
| buffer = gst_adapter_take_buffer (dash_stream->adapter, |
| gst_adapter_available (dash_stream->adapter)); |
| |
| GST_BUFFER_OFFSET (buffer) = dash_stream->current_offset; |
| GST_BUFFER_OFFSET_END (buffer) = |
| GST_BUFFER_OFFSET (buffer) + gst_buffer_get_size (buffer); |
| dash_stream->current_offset = GST_BUFFER_OFFSET_END (buffer); |
| |
| ret = gst_adaptive_demux_stream_push_buffer (stream, buffer); |
| } |
| |
| 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); |
| if (dash_stream->adapter) |
| g_object_unref (dash_stream->adapter); |
| if (dash_stream->moof) |
| gst_isoff_moof_box_free (dash_stream->moof); |
| if (dash_stream->moof_sync_samples) |
| g_array_free (dash_stream->moof_sync_samples, TRUE); |
| } |
| |
| static GstDashDemuxClockDrift * |
| gst_dash_demux_clock_drift_new (GstDashDemux * demux) |
| { |
| GstDashDemuxClockDrift *clock_drift; |
| |
| clock_drift = g_slice_new0 (GstDashDemuxClockDrift); |
| g_mutex_init (&clock_drift->clock_lock); |
| clock_drift->next_update = |
| GST_TIME_AS_USECONDS (gst_adaptive_demux_get_monotonic_time |
| (GST_ADAPTIVE_DEMUX_CAST (demux))); |
| return clock_drift; |
| } |
| |
| static void |
| gst_dash_demux_clock_drift_free (GstDashDemuxClockDrift * clock_drift) |
| { |
| if (clock_drift) { |
| g_mutex_lock (&clock_drift->clock_lock); |
| if (clock_drift->ntp_clock) |
| g_object_unref (clock_drift->ntp_clock); |
| g_mutex_unlock (&clock_drift->clock_lock); |
| g_mutex_clear (&clock_drift->clock_lock); |
| g_slice_free (GstDashDemuxClockDrift, clock_drift); |
| } |
| } |
| |
| /* |
| * The value attribute of the UTCTiming element contains a white-space |
| * separated list of servers that are recommended to be used in |
| * combination with the NTP protocol as defined in IETF RFC 5905 for |
| * getting the appropriate time. |
| * |
| * The DASH standard does not specify which version of NTP. This |
| * function only works with NTPv4 servers. |
| */ |
| static GstDateTime * |
| gst_dash_demux_poll_ntp_server (GstDashDemuxClockDrift * clock_drift, |
| gchar ** urls) |
| { |
| GstClockTime ntp_clock_time; |
| GDateTime *dt, *dt2; |
| |
| if (!clock_drift->ntp_clock) { |
| GResolver *resolver; |
| GList *inet_addrs; |
| GError *err; |
| gchar *ip_addr; |
| |
| resolver = g_resolver_get_default (); |
| /* We don't round-robin NTP servers. If the manifest specifies multiple |
| NTP time servers, select one at random */ |
| clock_drift->selected_url = g_random_int_range (0, g_strv_length (urls)); |
| GST_DEBUG ("Connecting to NTP time server %s", |
| urls[clock_drift->selected_url]); |
| inet_addrs = g_resolver_lookup_by_name (resolver, |
| urls[clock_drift->selected_url], NULL, &err); |
| g_object_unref (resolver); |
| if (!inet_addrs || g_list_length (inet_addrs) == 0) { |
| GST_ERROR ("Failed to resolve hostname of NTP server: %s", |
| err ? (err->message) : "unknown error"); |
| if (inet_addrs) |
| g_resolver_free_addresses (inet_addrs); |
| if (err) |
| g_error_free (err); |
| return NULL; |
| } |
| ip_addr = |
| g_inet_address_to_string ((GInetAddress |
| *) (g_list_first (inet_addrs)->data)); |
| clock_drift->ntp_clock = gst_ntp_clock_new ("dashntp", ip_addr, 123, 0); |
| g_free (ip_addr); |
| g_resolver_free_addresses (inet_addrs); |
| if (!clock_drift->ntp_clock) { |
| GST_ERROR ("Failed to create NTP clock"); |
| return NULL; |
| } |
| if (!gst_clock_wait_for_sync (clock_drift->ntp_clock, 5 * GST_SECOND)) { |
| g_object_unref (clock_drift->ntp_clock); |
| clock_drift->ntp_clock = NULL; |
| GST_ERROR ("Failed to lock to NTP clock"); |
| return NULL; |
| } |
| } |
| ntp_clock_time = gst_clock_get_time (clock_drift->ntp_clock); |
| if (ntp_clock_time == GST_CLOCK_TIME_NONE) { |
| GST_ERROR ("Failed to get time from NTP clock"); |
| return NULL; |
| } |
| ntp_clock_time -= NTP_TO_UNIX_EPOCH * GST_SECOND; |
| dt = g_date_time_new_from_unix_utc (ntp_clock_time / GST_SECOND); |
| if (!dt) { |
| GST_ERROR ("Failed to create GstDateTime"); |
| return NULL; |
| } |
| ntp_clock_time = |
| gst_util_uint64_scale (ntp_clock_time % GST_SECOND, 1000000, GST_SECOND); |
| dt2 = g_date_time_add (dt, ntp_clock_time); |
| g_date_time_unref (dt); |
| return gst_date_time_new_from_g_date_time (dt2); |
| } |
| |
| struct Rfc5322TimeZone |
| { |
| const gchar *name; |
| gfloat tzoffset; |
| }; |
| |
| /* |
| Parse an RFC5322 (section 3.3) date-time from the Date: field in the |
| HTTP response. |
| See https://tools.ietf.org/html/rfc5322#section-3.3 |
| */ |
| static GstDateTime * |
| gst_dash_demux_parse_http_head (GstDashDemuxClockDrift * clock_drift, |
| GstFragment * download) |
| { |
| static const gchar *months[] = { NULL, "Jan", "Feb", "Mar", "Apr", |
| "May", "Jun", "Jul", "Aug", |
| "Sep", "Oct", "Nov", "Dec", NULL |
| }; |
| static const struct Rfc5322TimeZone timezones[] = { |
| {"Z", 0}, |
| {"UT", 0}, |
| {"GMT", 0}, |
| {"BST", 1}, |
| {"EST", -5}, |
| {"EDT", -4}, |
| {"CST", -6}, |
| {"CDT", -5}, |
| {"MST", -7}, |
| {"MDT", -6}, |
| {"PST", -8}, |
| {"PDT", -7}, |
| {NULL, 0} |
| }; |
| GstDateTime *value = NULL; |
| const GstStructure *response_headers; |
| const gchar *http_date; |
| const GValue *val; |
| gint ret; |
| const gchar *pos; |
| gint year = -1, month = -1, day = -1, hour = -1, minute = -1, second = -1; |
| gchar zone[6]; |
| gchar monthstr[4]; |
| gfloat tzoffset = 0; |
| gboolean parsed_tz = FALSE; |
| |
| g_return_val_if_fail (download != NULL, NULL); |
| g_return_val_if_fail (download->headers != NULL, NULL); |
| |
| val = gst_structure_get_value (download->headers, "response-headers"); |
| if (!val) { |
| return NULL; |
| } |
| response_headers = gst_value_get_structure (val); |
| http_date = gst_structure_get_string (response_headers, "Date"); |
| if (!http_date) { |
| return NULL; |
| } |
| |
| /* skip optional text version of day of the week */ |
| pos = strchr (http_date, ','); |
| if (pos) |
| pos++; |
| else |
| pos = http_date; |
| ret = |
| sscanf (pos, "%02d %3s %04d %02d:%02d:%02d %5s", &day, monthstr, &year, |
| &hour, &minute, &second, zone); |
| if (ret == 7) { |
| gchar *z = zone; |
| gint i; |
| |
| for (i = 1; months[i]; ++i) { |
| if (g_ascii_strncasecmp (months[i], monthstr, strlen (months[i])) == 0) { |
| month = i; |
| break; |
| } |
| } |
| for (i = 0; timezones[i].name && !parsed_tz; ++i) { |
| if (g_ascii_strncasecmp (timezones[i].name, z, |
| strlen (timezones[i].name)) == 0) { |
| tzoffset = timezones[i].tzoffset; |
| parsed_tz = TRUE; |
| } |
| } |
| if (!parsed_tz) { |
| gint hh, mm; |
| gboolean neg = FALSE; |
| /* check if it is in the form +-HHMM */ |
| if (*z == '+' || *z == '-') { |
| if (*z == '+') |
| ++z; |
| else if (*z == '-') { |
| ++z; |
| neg = TRUE; |
| } |
| ret = sscanf (z, "%02d%02d", &hh, &mm); |
| if (ret == 2) { |
| tzoffset = hh; |
| tzoffset += mm / 60.0; |
| if (neg) |
| tzoffset = -tzoffset; |
| parsed_tz = TRUE; |
| } |
| } |
| } |
| /* Accept year in both 2 digit or 4 digit format */ |
| if (year < 100) |
| year += 2000; |
| } |
| if (month > 0 && parsed_tz) { |
| value = gst_date_time_new (tzoffset, |
| year, month, day, hour, minute, second); |
| } |
| return value; |
| } |
| |
| /* |
| The timing information is contained in the message body of the HTTP |
| response and contains a time value formatted according to NTP timestamp |
| format in IETF RFC 5905. |
| |
| 0 1 2 3 |
| 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| | Seconds | |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| | Fraction | |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| |
| NTP Timestamp Format |
| */ |
| static GstDateTime * |
| gst_dash_demux_parse_http_ntp (GstDashDemuxClockDrift * clock_drift, |
| GstBuffer * buffer) |
| { |
| gint64 seconds; |
| guint64 fraction; |
| GDateTime *dt, *dt2; |
| GstMapInfo mapinfo; |
| |
| /* See https://tools.ietf.org/html/rfc5905#page-12 for details of |
| the NTP Timestamp Format */ |
| gst_buffer_map (buffer, &mapinfo, GST_MAP_READ); |
| if (mapinfo.size != 8) { |
| gst_buffer_unmap (buffer, &mapinfo); |
| return NULL; |
| } |
| seconds = GST_READ_UINT32_BE (mapinfo.data); |
| fraction = GST_READ_UINT32_BE (mapinfo.data + 4); |
| gst_buffer_unmap (buffer, &mapinfo); |
| fraction = gst_util_uint64_scale (fraction, 1000000, |
| G_GUINT64_CONSTANT (1) << 32); |
| /* subtract constant to convert from 1900 based time to 1970 based time */ |
| seconds -= NTP_TO_UNIX_EPOCH; |
| dt = g_date_time_new_from_unix_utc (seconds); |
| dt2 = g_date_time_add (dt, fraction); |
| g_date_time_unref (dt); |
| return gst_date_time_new_from_g_date_time (dt2); |
| } |
| |
| /* |
| The timing information is contained in the message body of the |
| HTTP response and contains a time value formatted according to |
| xs:dateTime as defined in W3C XML Schema Part 2: Datatypes specification. |
| */ |
| static GstDateTime * |
| gst_dash_demux_parse_http_xsdate (GstDashDemuxClockDrift * clock_drift, |
| GstBuffer * buffer) |
| { |
| GstDateTime *value = NULL; |
| GstMapInfo mapinfo; |
| |
| /* the string from the server might not be zero terminated */ |
| if (gst_buffer_map (buffer, &mapinfo, GST_MAP_READ)) { |
| gchar *str; |
| str = g_strndup ((const gchar *) mapinfo.data, mapinfo.size); |
| gst_buffer_unmap (buffer, &mapinfo); |
| value = gst_date_time_new_from_iso8601_string (str); |
| g_free (str); |
| } |
| return value; |
| } |
| |
| static gboolean |
| gst_dash_demux_poll_clock_drift (GstDashDemux * demux) |
| { |
| GstDashDemuxClockDrift *clock_drift; |
| GDateTime *start = NULL, *end; |
| GstBuffer *buffer = NULL; |
| GstDateTime *value = NULL; |
| gboolean ret = FALSE; |
| gint64 now; |
| GstMPDUTCTimingType method; |
| gchar **urls; |
| |
| g_return_val_if_fail (demux != NULL, FALSE); |
| g_return_val_if_fail (demux->clock_drift != NULL, FALSE); |
| clock_drift = demux->clock_drift; |
| now = |
| GST_TIME_AS_USECONDS (gst_adaptive_demux_get_monotonic_time |
| (GST_ADAPTIVE_DEMUX_CAST (demux))); |
| if (now < clock_drift->next_update) { |
| /*TODO: If a fragment fails to download in adaptivedemux, it waits |
| for a manifest reload before another attempt to fetch a fragment. |
| Section 10.8.6 of the DVB-DASH standard states that the DASH client |
| shall refresh the manifest and resynchronise to one of the time sources. |
| |
| Currently the fact that the manifest refresh follows a download failure |
| does not make it into dashdemux. */ |
| return TRUE; |
| } |
| urls = gst_mpd_client_get_utc_timing_sources (demux->client, |
| SUPPORTED_CLOCK_FORMATS, &method); |
| if (!urls) { |
| return FALSE; |
| } |
| /* Update selected_url just in case the number of URLs in the UTCTiming |
| element has shrunk since the last poll */ |
| clock_drift->selected_url = clock_drift->selected_url % g_strv_length (urls); |
| g_mutex_lock (&clock_drift->clock_lock); |
| |
| if (method == GST_MPD_UTCTIMING_TYPE_NTP) { |
| value = gst_dash_demux_poll_ntp_server (clock_drift, urls); |
| if (!value) { |
| GST_ERROR_OBJECT (demux, "Failed to fetch time from NTP server %s", |
| urls[clock_drift->selected_url]); |
| g_mutex_unlock (&clock_drift->clock_lock); |
| goto quit; |
| } |
| } |
| start = |
| gst_adaptive_demux_get_client_now_utc (GST_ADAPTIVE_DEMUX_CAST (demux)); |
| if (!value) { |
| GstFragment *download; |
| gint64 range_start = 0, range_end = -1; |
| GST_DEBUG_OBJECT (demux, "Fetching current time from %s", |
| urls[clock_drift->selected_url]); |
| if (method == GST_MPD_UTCTIMING_TYPE_HTTP_HEAD) { |
| range_start = -1; |
| } |
| download = |
| gst_uri_downloader_fetch_uri_with_range (GST_ADAPTIVE_DEMUX_CAST |
| (demux)->downloader, urls[clock_drift->selected_url], NULL, TRUE, TRUE, |
| TRUE, range_start, range_end, NULL); |
| if (download) { |
| if (method == GST_MPD_UTCTIMING_TYPE_HTTP_HEAD && download->headers) { |
| value = gst_dash_demux_parse_http_head (clock_drift, download); |
| } else { |
| buffer = gst_fragment_get_buffer (download); |
| } |
| g_object_unref (download); |
| } |
| } |
| g_mutex_unlock (&clock_drift->clock_lock); |
| if (!value && !buffer) { |
| GST_ERROR_OBJECT (demux, "Failed to fetch time from %s", |
| urls[clock_drift->selected_url]); |
| goto quit; |
| } |
| end = gst_adaptive_demux_get_client_now_utc (GST_ADAPTIVE_DEMUX_CAST (demux)); |
| if (!value && method == GST_MPD_UTCTIMING_TYPE_HTTP_NTP) { |
| value = gst_dash_demux_parse_http_ntp (clock_drift, buffer); |
| } else if (!value) { |
| /* GST_MPD_UTCTIMING_TYPE_HTTP_XSDATE or GST_MPD_UTCTIMING_TYPE_HTTP_ISO */ |
| value = gst_dash_demux_parse_http_xsdate (clock_drift, buffer); |
| } |
| if (buffer) |
| gst_buffer_unref (buffer); |
| if (value) { |
| GTimeSpan download_duration = g_date_time_difference (end, start); |
| GDateTime *client_now, *server_now; |
| /* We don't know when the server sampled its clock, but we know |
| it must have been before "end" and probably after "start". |
| A reasonable estimate is to use (start+end)/2 |
| */ |
| client_now = g_date_time_add (start, download_duration / 2); |
| server_now = gst_date_time_to_g_date_time (value); |
| /* If gst_date_time_new_from_iso8601_string is given an unsupported |
| ISO 8601 format, it can return a GstDateTime that is not valid, |
| which causes gst_date_time_to_g_date_time to return NULL */ |
| if (server_now) { |
| g_mutex_lock (&clock_drift->clock_lock); |
| clock_drift->clock_compensation = |
| g_date_time_difference (server_now, client_now); |
| g_mutex_unlock (&clock_drift->clock_lock); |
| GST_DEBUG_OBJECT (demux, |
| "Difference between client and server clocks is %lfs", |
| ((double) clock_drift->clock_compensation) / 1000000.0); |
| g_date_time_unref (server_now); |
| ret = TRUE; |
| } else { |
| GST_ERROR_OBJECT (demux, "Failed to parse DateTime from server"); |
| } |
| g_date_time_unref (client_now); |
| gst_date_time_unref (value); |
| } else { |
| GST_ERROR_OBJECT (demux, "Failed to parse DateTime from server"); |
| } |
| g_date_time_unref (end); |
| quit: |
| if (start) |
| g_date_time_unref (start); |
| /* if multiple URLs were specified, use a simple round-robin to |
| poll each server */ |
| g_mutex_lock (&clock_drift->clock_lock); |
| if (method == GST_MPD_UTCTIMING_TYPE_NTP) { |
| clock_drift->next_update = now + FAST_CLOCK_UPDATE_INTERVAL; |
| } else { |
| clock_drift->selected_url = |
| (1 + clock_drift->selected_url) % g_strv_length (urls); |
| if (ret) { |
| clock_drift->next_update = now + SLOW_CLOCK_UPDATE_INTERVAL; |
| } else { |
| clock_drift->next_update = now + FAST_CLOCK_UPDATE_INTERVAL; |
| } |
| } |
| g_mutex_unlock (&clock_drift->clock_lock); |
| return ret; |
| } |
| |
| static GTimeSpan |
| gst_dash_demux_get_clock_compensation (GstDashDemux * demux) |
| { |
| GTimeSpan rv = 0; |
| if (demux->clock_drift) { |
| g_mutex_lock (&demux->clock_drift->clock_lock); |
| rv = demux->clock_drift->clock_compensation; |
| g_mutex_unlock (&demux->clock_drift->clock_lock); |
| } |
| GST_LOG_OBJECT (demux, "Clock drift %" GST_STIME_FORMAT, GST_STIME_ARGS (rv)); |
| return rv; |
| } |
| |
| static GDateTime * |
| gst_dash_demux_get_server_now_utc (GstDashDemux * demux) |
| { |
| GDateTime *client_now; |
| GDateTime *server_now; |
| |
| client_now = |
| gst_adaptive_demux_get_client_now_utc (GST_ADAPTIVE_DEMUX_CAST (demux)); |
| server_now = |
| g_date_time_add (client_now, |
| gst_dash_demux_get_clock_compensation (demux)); |
| g_date_time_unref (client_now); |
| return server_now; |
| } |