gstreamer/subprojects/gst-plugins-bad/ext/dash/gstdashdemux.h
Jan Schmidt 4e25c519de dashdemux: Preserve current representation on live manifest updates
When updating a manifest during live playback, preserve the current
representation for each stream.

During update_fragment_info, if the current representation changed
because it couldn't be matched, trigger a caps change and new
header download.

This reverts commit e0e1db212f
and reapplies "dashdemux: Fix issue when manifest update sets slow start
without passing necessary header & caps changes downstream" with
changes.

Fixes https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/issues/507
Fixes https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/issues/1729

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2920>
2022-09-05 16:07:00 +00:00

164 lines
4.8 KiB
C

/*
* DASH demux plugin for GStreamer
*
* gstdashdemux.h
*
* 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.
*/
#ifndef __GST_DASH_DEMUX_H__
#define __GST_DASH_DEMUX_H__
#include <gst/gst.h>
#include <gst/adaptivedemux/gstadaptivedemux.h>
#include <gst/base/gstadapter.h>
#include <gst/base/gstdataqueue.h>
#include "gstmpdclient.h"
#include <gst/isoff/gstisoff.h>
#include <gst/uridownloader/gsturidownloader.h>
G_BEGIN_DECLS
#define GST_TYPE_DASH_DEMUX \
(gst_dash_demux_get_type())
#define GST_DASH_DEMUX(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_DASH_DEMUX,GstDashDemux))
#define GST_DASH_DEMUX_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_DASH_DEMUX,GstDashDemuxClass))
#define GST_IS_DASH_DEMUX(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_DASH_DEMUX))
#define GST_IS_DASH_DEMUX_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_DASH_DEMUX))
#define GST_DASH_DEMUX_CAST(obj) \
((GstDashDemux *)obj)
typedef struct _GstDashDemuxClockDrift GstDashDemuxClockDrift;
typedef struct _GstDashDemuxStream GstDashDemuxStream;
typedef struct _GstDashDemux GstDashDemux;
typedef struct _GstDashDemuxClass GstDashDemuxClass;
struct _GstDashDemuxStream
{
GstAdaptiveDemuxStream parent;
gint index;
GstActiveStream *active_stream;
GstMediaFragmentInfo current_fragment;
/* index parsing */
GstSidxParser sidx_parser;
GstClockTime sidx_position;
gint64 sidx_base_offset;
gboolean allow_sidx;
GstClockTime pending_seek_ts;
GstAdapter *adapter;
/* current offset of the first byte in the adapter / last byte we pushed or
* dropped*/
guint64 current_offset;
/* index = 1, header = 2, data = 3 */
guint current_index_header_or_data;
/* ISOBMFF box parsing */
gboolean is_isobmff;
struct {
/* index = 1, header = 2, data = 3 */
guint32 current_fourcc;
guint64 current_start_offset;
guint64 current_size;
} isobmff_parser;
GstMoofBox *moof;
guint64 moof_offset, moof_size;
GArray *moof_sync_samples;
guint current_sync_sample;
guint64 moof_average_size;
guint64 keyframe_average_size;
guint64 keyframe_average_distance;
gboolean first_sync_sample_after_moof, first_sync_sample_always_after_moof;
/* Internal position value, at the keyframe/entry level */
GstClockTime actual_position;
/* Timestamp of the beginning of the current fragment */
GstClockTime current_fragment_timestamp;
GstClockTime current_fragment_duration;
GstClockTime current_fragment_keyframe_distance;
/* Average keyframe download time (only in trickmode-key-units) */
GstClockTime average_download_time;
/* Cached target time (only in trickmode-key-units) */
GstClockTime target_time;
/* Average skip-ahead time (only in trickmode-key-units) */
GstClockTime average_skip_size;
gchar *last_representation_id;
};
/**
* GstDashDemux:
*
* Opaque #GstDashDemux data structure.
*/
struct _GstDashDemux
{
GstAdaptiveDemux parent;
GSList *next_periods;
GstMPDClient *client; /* MPD client */
GMutex client_lock;
GstDashDemuxClockDrift *clock_drift;
gboolean end_of_period;
gboolean end_of_manifest;
/* Properties */
GstClockTime max_buffering_time; /* Maximum buffering time accumulated during playback */
guint max_bitrate; /* max of bitrate supported by target decoder */
gint max_video_width, max_video_height;
gint max_video_framerate_n, max_video_framerate_d;
gchar* default_presentation_delay; /* presentation time delay if MPD@suggestedPresentationDelay is not present */
gint n_audio_streams;
gint n_video_streams;
gint n_subtitle_streams;
gboolean trickmode_no_audio;
gboolean allow_trickmode_key_units;
};
struct _GstDashDemuxClass
{
GstAdaptiveDemuxClass parent_class;
};
GType gst_dash_demux_get_type (void);
GST_ELEMENT_REGISTER_DECLARE (dashdemux);
G_END_DECLS
#endif /* __GST_DASH_DEMUX_H__ */