gst/matroska/matroska-demux.h

   1 /* GStreamer Matroska muxer/demuxer
   2  * (c) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
   3  * (c) 2011 Debarshi Ray <rishi@gnu.org>
   4  *
   5  * matroska-demux.h: matroska file/stream demuxer definition
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Library General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Library General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Library General Public
  18  * License along with this library; if not, write to the
  19  * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
  20  * Boston, MA 02110-1301, USA.
  21  */
  22
  23 #ifndef __GST_MATROSKA_DEMUX_H__
  24 #define __GST_MATROSKA_DEMUX_H__
  25
  26 #include <gst/gst.h>
  27 #include <gst/base/gstflowcombiner.h>
  28
  29 #include "ebml-read.h"
  30 #include "matroska-ids.h"
  31 #include "matroska-read-common.h"
  32
  33 G_BEGIN_DECLS
  34
  35 #define GST_TYPE_MATROSKA_DEMUX \
  36   (gst_matroska_demux_get_type ())
  37 #define GST_MATROSKA_DEMUX(obj) \
  38   (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_MATROSKA_DEMUX, GstMatroskaDemux))
  39 #define GST_MATROSKA_DEMUX_CLASS(klass) \
  40   (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_MATROSKA_DEMUX, GstMatroskaDemuxClass))
  41 #define GST_IS_MATROSKA_DEMUX(obj) \
  42   (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_MATROSKA_DEMUX))
  43 #define GST_IS_MATROSKA_DEMUX_CLASS(klass) \
  44   (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_MATROSKA_DEMUX))
  45
  46 typedef struct _GstMatroskaDemux {
  47   GstElement              parent;
  48
  49   /* < private > */
  50
  51   GstMatroskaReadCommon    common;
  52
  53   /* pads */
  54   GstClock                *clock;
  55   gboolean                 have_nonintraonly_v_streams;
  56   guint                    num_v_streams;
  57   guint                    num_a_streams;
  58   guint                    num_t_streams;
  59
  60   guint                    group_id;
  61   gboolean                 have_group_id;
  62
  63   GstFlowCombiner         *flowcombiner;
  64
  65   /* state */
  66   gboolean                 streaming;
  67   guint64                  seek_block;
  68   gboolean                 seek_first;
  69
  70   /* did we parse cues/tracks/segmentinfo already? */
  71   gboolean                 tracks_parsed;
  72   GList                   *seek_parsed;
  73
  74   /* cluster positions (optional) */
  75   GArray                  *clusters;
  76
  77   /* keeping track of playback position */
  78   GstClockTime             last_stop_end;
  79   GstClockTime             stream_start_time;
  80
  81   /* Stop time for reverse playback */
  82   GstClockTime             to_time;
  83   GstEvent                *new_segment;
  84
  85   /* some state saving */
  86   GstClockTime             cluster_time;
  87   guint64                  cluster_offset;
  88   guint64                  cluster_prevsize;       /* 0 if unknown */
  89   guint64                  first_cluster_offset;
  90   guint64                  next_cluster_offset;
  91   GstClockTime             requested_seek_time;
  92   guint64                  seek_offset;
  93
  94   /* alternative duration; optionally obtained from last cluster */
  95   guint64                  last_cluster_offset;
  96   GstClockTime             stream_last_time;
  97
  98   /* index stuff */
  99   gboolean                 seekable;
 100   gboolean                 building_index;
 101   guint64                  index_offset;
 102   GstEvent                *seek_event;
 103   gboolean                 need_segment;
 104   guint32                  segment_seqnum;
 105
 106   /* reverse playback */
 107   GArray                  *seek_index;
 108   gint                     seek_entry;
 109
 110   gboolean                 seen_cluster_prevsize;  /* We track this because the
 111                                                     * first cluster won't have
 112                                                     * this set, so we can't just
 113                                                     * check cluster_prevsize to
 114                                                     * determine if it's there
 115                                                     * or not. We assume if one
 116                                                     * cluster has it, all but
 117                                                     * the first will have it. */
 118
 119   guint                    max_backtrack_distance; /* in seconds (0 = don't backtrack) */
 120
 121   /* gap handling */
 122   guint64                  max_gap_time;
 123
 124   /* for non-finalized files, with invalid segment duration */
 125   gboolean                 invalid_duration;
 126
 127   /* Cached upstream length (default G_MAXUINT64) */
 128   guint64                  cached_length;
 129 } GstMatroskaDemux;
 130
 131 typedef struct _GstMatroskaDemuxClass {
 132   GstElementClass parent;
 133 } GstMatroskaDemuxClass;
 134
 135 gboolean gst_matroska_demux_plugin_init (GstPlugin *plugin);
 136
 137 G_END_DECLS
 138
 139 #endif /* __GST_MATROSKA_DEMUX_H__ */