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a6702a76d5
TOC support in mastroskamux has been deactivated for a couple of years. This commit updates it to recent GstToc evolutions and introduces toc unit tests for both matroska-mux and matroska-demux. There are two UIDs for Chapters in Matroska's specifications: - The ChapterUID is a mandatory unsigned integer which internally refers to a given chapter. Except for title & language which use dedicated fields, this UID can also be used to add tags to the Chapter. The tags come in a separate section of the container. - The ChapterStringUID is an optional UTF-8 string which also uniquely refers to a chapter but from an external perspective. It can act as a "WebVTT cue identifier" which "can be used to reference a specific cue, for example from script or CSS". During muxing, the ChapterUID is generated and checked for unicity, while the ChapterStringUID receives the user defined UID. In order to be able to refer to chapters from the tags section, we maintain an internal Toc tree with the generated ChapterUID. When demuxing, the ChapterStringUIDs (if available) are assigned to the GstTocEntries UIDs and an internal toc mimicking the toc is used to keep track of the ChapterUIDs and match the tags with the appropriate GstTocEntries. https://bugzilla.gnome.org/show_bug.cgi?id=790686
172 lines
6.4 KiB
C
172 lines
6.4 KiB
C
/* GStreamer Matroska muxer/demuxer
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* (c) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
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* (c) 2011 Debarshi Ray <rishi@gnu.org>
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*
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* matroska-read-common.h: shared by matroska file/stream demuxer and parser
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __GST_MATROSKA_READ_COMMON_H__
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#define __GST_MATROSKA_READ_COMMON_H__
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#include <glib.h>
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#include <gst/gst.h>
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#include <gst/base/gstadapter.h>
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#include "matroska-ids.h"
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G_BEGIN_DECLS
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GST_DEBUG_CATEGORY_EXTERN(matroskareadcommon_debug);
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typedef enum {
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GST_MATROSKA_READ_STATE_START,
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GST_MATROSKA_READ_STATE_SEGMENT,
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GST_MATROSKA_READ_STATE_HEADER,
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GST_MATROSKA_READ_STATE_DATA,
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GST_MATROSKA_READ_STATE_SEEK,
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GST_MATROSKA_READ_STATE_SCANNING
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} GstMatroskaReadState;
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typedef struct _GstMatroskaReadCommon {
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#if 0
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GstIndex *element_index;
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gint element_index_writer_id;
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#endif
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/* pads */
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GstPad *sinkpad;
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GPtrArray *src;
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guint num_streams;
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/* metadata */
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gchar *muxing_app;
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gchar *writing_app;
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gint64 created;
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/* state */
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GstMatroskaReadState state;
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/* stream type */
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gboolean is_webm;
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gboolean has_video;
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/* did we parse cues/tracks/segmentinfo already? */
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gboolean index_parsed;
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gboolean segmentinfo_parsed;
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gboolean attachments_parsed;
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gboolean chapters_parsed;
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GList *tags_parsed;
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/* chapters stuff */
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/* Internal toc is used to keep track of the internal UID
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* which are different from the external StringUID used
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* in the user toc */
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GstToc *toc;
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GstToc *internal_toc;
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gboolean toc_updated;
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/* start-of-segment and length */
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guint64 ebml_segment_start;
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guint64 ebml_segment_length;
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/* a cue (index) table */
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GArray *index;
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/* timescale in the file */
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guint64 time_scale;
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/* keeping track of playback position */
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GstSegment segment;
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GstTagList *global_tags;
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gboolean global_tags_changed;
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/* pull mode caching */
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GstBuffer *cached_buffer;
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guint8 *cached_data;
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GstMapInfo cached_map;
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/* push and pull mode */
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guint64 offset;
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guint64 start_resync_offset;
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/* state to restore after scanning for invalid data */
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gint state_to_restore;
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/* push based mode usual suspects */
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GstAdapter *adapter;
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/* cache for track tags that forward-reference their tracks */
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GHashTable *cached_track_taglists ;
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} GstMatroskaReadCommon;
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GstFlowReturn gst_matroska_decode_content_encodings (GArray * encodings);
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gboolean gst_matroska_decode_data (GArray * encodings, gpointer * data_out,
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gsize * size_out, GstMatroskaTrackEncodingScope scope, gboolean free);
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gint gst_matroska_index_seek_find (GstMatroskaIndex * i1, GstClockTime * time,
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gpointer user_data);
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GstMatroskaIndex * gst_matroska_read_common_do_index_seek (
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GstMatroskaReadCommon * common, GstMatroskaTrackContext * track, gint64
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seek_pos, GArray ** _index, gint * _entry_index, GstSearchMode snap_dir);
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void gst_matroska_read_common_found_global_tag (GstMatroskaReadCommon * common,
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GstElement * el, GstTagList * taglist);
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gint64 gst_matroska_read_common_get_length (GstMatroskaReadCommon * common);
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GstMatroskaTrackContext * gst_matroska_read_common_get_seek_track (
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GstMatroskaReadCommon * common, GstMatroskaTrackContext * track);
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GstFlowReturn gst_matroska_read_common_parse_index (GstMatroskaReadCommon *
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common, GstEbmlRead * ebml);
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GstFlowReturn gst_matroska_read_common_parse_info (GstMatroskaReadCommon *
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common, GstElement * el, GstEbmlRead * ebml);
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GstFlowReturn gst_matroska_read_common_parse_attachments (
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GstMatroskaReadCommon * common, GstElement * el, GstEbmlRead * ebml);
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GstFlowReturn gst_matroska_read_common_parse_chapters (GstMatroskaReadCommon *
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common, GstEbmlRead * ebml);
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GstFlowReturn gst_matroska_read_common_parse_header (GstMatroskaReadCommon *
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common, GstEbmlRead * ebml);
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GstFlowReturn gst_matroska_read_common_parse_metadata (GstMatroskaReadCommon *
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common, GstElement * el, GstEbmlRead * ebml);
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GstFlowReturn gst_matroska_read_common_parse_skip (GstMatroskaReadCommon *
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common, GstEbmlRead * ebml, const gchar * parent_name, guint id);
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GstFlowReturn gst_matroska_read_common_peek_bytes (GstMatroskaReadCommon *
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common, guint64 offset, guint size, GstBuffer ** p_buf, guint8 ** bytes);
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GstFlowReturn gst_matroska_read_common_peek_id_length_pull (GstMatroskaReadCommon *
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common, GstElement * el, guint32 * _id, guint64 * _length, guint *
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_needed);
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GstFlowReturn gst_matroska_read_common_peek_id_length_push (GstMatroskaReadCommon *
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common, GstElement * el, guint32 * _id, guint64 * _length, guint *
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_needed);
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gint gst_matroska_read_common_stream_from_num (GstMatroskaReadCommon * common,
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guint track_num);
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GstFlowReturn gst_matroska_read_common_read_track_encodings (
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GstMatroskaReadCommon * common, GstEbmlRead * ebml,
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GstMatroskaTrackContext * context);
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void gst_matroska_read_common_reset_streams (GstMatroskaReadCommon * common,
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GstClockTime time, gboolean full);
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void gst_matroska_read_common_free_parsed_el (gpointer mem, gpointer user_data);
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void gst_matroska_read_common_init (GstMatroskaReadCommon * ctx);
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void gst_matroska_read_common_finalize (GstMatroskaReadCommon * ctx);
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void gst_matroska_read_common_reset (GstElement * element,
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GstMatroskaReadCommon * ctx);
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gboolean gst_matroska_read_common_tracknumber_unique (GstMatroskaReadCommon *
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common, guint64 num);
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G_END_DECLS
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#endif /* __GST_MATROSKA_READ_COMMON_H__ */
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