gst/matroska/matroska-demux.h

   1 /* GStreamer Matroska muxer/demuxer
   2  * (c) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
   3  *
   4  * matroska-demux.h: matroska file/stream demuxer definition
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Library General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Library General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Library General Public
  17  * License along with this library; if not, write to the
  18  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19  * Boston, MA 02111-1307, USA.
  20  */
  21
  22 #ifndef __GST_MATROSKA_DEMUX_H__
  23 #define __GST_MATROSKA_DEMUX_H__
  24
  25 #include <gst/gst.h>
  26 #include <gst/base/gstadapter.h>
  27
  28 #include "ebml-read.h"
  29 #include "matroska-ids.h"
  30
  31 G_BEGIN_DECLS
  32
  33 #define GST_TYPE_MATROSKA_DEMUX \
  34   (gst_matroska_demux_get_type ())
  35 #define GST_MATROSKA_DEMUX(obj) \
  36   (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_MATROSKA_DEMUX, GstMatroskaDemux))
  37 #define GST_MATROSKA_DEMUX_CLASS(klass) \
  38   (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_MATROSKA_DEMUX, GstMatroskaDemuxClass))
  39 #define GST_IS_MATROSKA_DEMUX(obj) \
  40   (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_MATROSKA_DEMUX))
  41 #define GST_IS_MATROSKA_DEMUX_CLASS(klass) \
  42   (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_MATROSKA_DEMUX))
  43
  44 typedef enum {
  45   GST_MATROSKA_DEMUX_STATE_START,
  46   GST_MATROSKA_DEMUX_STATE_SEGMENT,
  47   GST_MATROSKA_DEMUX_STATE_HEADER,
  48   GST_MATROSKA_DEMUX_STATE_DATA,
  49   GST_MATROSKA_DEMUX_STATE_SEEK,
  50   GST_MATROSKA_DEMUX_STATE_SCANNING
  51 } GstMatroskaDemuxState;
  52
  53 typedef struct _GstMatroskaDemux {
  54   GstElement              parent;
  55
  56   /* < private > */
  57
  58   GstIndex                *element_index;
  59   gint                     element_index_writer_id;
  60
  61   /* pads */
  62   GstPad                  *sinkpad;
  63   GPtrArray               *src;
  64   GstClock                *clock;
  65   guint                    num_streams;
  66   guint                    num_v_streams;
  67   guint                    num_a_streams;
  68   guint                    num_t_streams;
  69
  70   /* metadata */
  71   gchar                   *muxing_app;
  72   gchar                   *writing_app;
  73   gint64                   created;
  74
  75   /* state */
  76   gboolean                 streaming;
  77   GstMatroskaDemuxState    state;
  78   guint                    level_up;
  79   guint64                  seek_block;
  80   gboolean                 seek_first;
  81
  82   /* did we parse cues/tracks/segmentinfo already? */
  83   gboolean                 index_parsed;
  84   gboolean                 tracks_parsed;
  85   gboolean                 segmentinfo_parsed;
  86   gboolean                 attachments_parsed;
  87   GList                   *tags_parsed;
  88   GList                   *seek_parsed;
  89
  90   /* start-of-segment */
  91   guint64                  ebml_segment_start;
  92
  93   /* a cue (index) table */
  94   GArray                  *index;
  95   /* cluster positions (optional) */
  96   GArray                  *clusters;
  97
  98   /* timescale in the file */
  99   guint64                  time_scale;
 100
 101   /* keeping track of playback position */
 102   GstSegment               segment;
 103   gboolean                 segment_running;
 104   GstClockTime             last_stop_end;
 105
 106   GstEvent                *close_segment;
 107   GstEvent                *new_segment;
 108   GstTagList              *global_tags;
 109
 110   /* pull mode caching */
 111   GstBuffer *cached_buffer;
 112
 113   /* push and pull mode */
 114   guint64                  offset;
 115   /* some state saving */
 116   GstClockTime             cluster_time;
 117   guint64                  cluster_offset;
 118   guint64                  first_cluster_offset;
 119   guint64                  next_cluster_offset;
 120
 121   /* push based mode usual suspects */
 122   GstAdapter              *adapter;
 123   /* index stuff */
 124   gboolean                 seekable;
 125   gboolean                 building_index;
 126   guint64                  index_offset;
 127   GstEvent                *seek_event;
 128   gboolean                 need_newsegment;
 129
 130   /* reverse playback */
 131   GArray                  *seek_index;
 132   gint                     seek_entry;
 133 } GstMatroskaDemux;
 134
 135 typedef struct _GstMatroskaDemuxClass {
 136   GstElementClass parent;
 137 } GstMatroskaDemuxClass;
 138
 139 gboolean gst_matroska_demux_plugin_init (GstPlugin *plugin);
 140
 141 G_END_DECLS
 142
 143 #endif /* __GST_MATROSKA_DEMUX_H__ */