gstreamer/subprojects/gst-plugins-good/gst/matroska/matroska-demux.h
2022-10-27 19:45:44 +00:00

146 lines
5.2 KiB
C

/* GStreamer Matroska muxer/demuxer
* (c) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
* (c) 2011 Debarshi Ray <rishi@gnu.org>
*
* matroska-demux.h: matroska file/stream demuxer definition
*
* 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 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; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GST_MATROSKA_DEMUX_H__
#define __GST_MATROSKA_DEMUX_H__
#include <gst/gst.h>
#include <gst/base/gstflowcombiner.h>
#include "ebml-read.h"
#include "matroska-ids.h"
#include "matroska-read-common.h"
G_BEGIN_DECLS
#define GST_TYPE_MATROSKA_DEMUX \
(gst_matroska_demux_get_type ())
#define GST_MATROSKA_DEMUX(obj) \
(G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_MATROSKA_DEMUX, GstMatroskaDemux))
#define GST_MATROSKA_DEMUX_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_MATROSKA_DEMUX, GstMatroskaDemuxClass))
#define GST_IS_MATROSKA_DEMUX(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_MATROSKA_DEMUX))
#define GST_IS_MATROSKA_DEMUX_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_MATROSKA_DEMUX))
typedef struct _GstMatroskaDemux {
GstElement parent;
/* < private > */
GstMatroskaReadCommon common;
/* pads */
GstClock *clock;
gboolean have_nonintraonly_v_streams;
guint num_v_streams;
guint num_a_streams;
guint num_t_streams;
guint group_id;
gboolean have_group_id;
GstFlowCombiner *flowcombiner;
/* state */
gboolean streaming;
guint64 seek_block;
gboolean seek_first;
/* did we parse cues/tracks/segmentinfo already? */
GList *seek_parsed;
/* Offset of the last Tracks element parsed,
* to avoid reparsing or recreating tracks unecessarily */
guint64 tracks_ebml_offset;
/* cluster positions (optional) */
GArray *clusters;
/* keeping track of playback position */
GstClockTime last_stop_end;
GstClockTime stream_start_time;
/* Stop time for reverse playback */
GstClockTime to_time;
GstEvent *new_segment;
/* some state saving */
GstClockTime cluster_time;
guint64 cluster_offset;
guint64 cluster_prevsize; /* 0 if unknown */
guint64 first_cluster_offset;
guint64 next_cluster_offset;
GstClockTime requested_seek_time;
guint64 seek_offset;
GstClockTime audio_lead_in_ts;
/* alternative duration; optionally obtained from last cluster */
guint64 last_cluster_offset;
GstClockTime stream_last_time;
/* index stuff */
gboolean seekable;
gboolean building_index;
guint64 index_offset;
GstEvent *seek_event;
GstEvent *deferred_seek_event;
GstPad *deferred_seek_pad;
gboolean need_segment;
guint32 segment_seqnum;
/* If TRUE, matroskamux received upstream newsegment in TIME format
* which likely means that upstream is driving the pipeline (such as
* adaptive demuxers) */
gboolean upstream_format_is_time;
/* reverse playback */
GArray *seek_index;
gint seek_entry;
gboolean seen_cluster_prevsize; /* We track this because the
* first cluster won't have
* this set, so we can't just
* check cluster_prevsize to
* determine if it's there
* or not. We assume if one
* cluster has it, all but
* the first will have it. */
guint max_backtrack_distance; /* in seconds (0 = don't backtrack) */
/* gap handling */
guint64 max_gap_time;
/* for non-finalized files, with invalid segment duration */
gboolean invalid_duration;
/* Cached upstream length (default G_MAXUINT64) */
guint64 cached_length;
} GstMatroskaDemux;
typedef struct _GstMatroskaDemuxClass {
GstElementClass parent;
} GstMatroskaDemuxClass;
G_END_DECLS
#endif /* __GST_MATROSKA_DEMUX_H__ */