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b4d6263f38
In case many packets fit on a page, we may not see a granpos for a while, and granpos interpolation can wrap the 'frames since last keyframe' part of the granpos, generating a granpos which is smaller than what it should be. This is fixed by detecting keyframe packets (at least for Theora), and updating the last keyframe granpos from this. This may still be generating potentially wrong granpos for streams which have a Theora like granpos (keyframes, a max keyframe distance and a count of frames since last keyframe), and which allow implicit granules on packets. For these streams, a custom keyframe detection routine should be plugged into their GstOggStream mapper. https://bugzilla.gnome.org/show_bug.cgi?id=669164
144 lines
4.3 KiB
C
144 lines
4.3 KiB
C
/* GStreamer
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* Copyright (C) 2009 David Schleef <ds@schleef.org>
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*
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* gstoggstream.h: header for GstOggStream
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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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __GST_OGG_STREAM_H__
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#define __GST_OGG_STREAM_H__
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#include <ogg/ogg.h>
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#include <gst/gst.h>
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#include <gst/tag/tag.h>
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G_BEGIN_DECLS
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typedef enum {
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GST_OGG_SKELETON_FISBONE,
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GST_OGG_SKELETON_INDEX,
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} GstOggSkeleton;
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typedef struct {
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guint64 offset;
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guint64 timestamp;
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} GstOggIndex;
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typedef struct _GstOggStream GstOggStream;
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struct _GstOggStream
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{
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ogg_stream_state stream;
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guint32 serialno;
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GList *headers;
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gboolean have_headers;
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GList *queued;
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/* for oggparse */
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gboolean in_headers;
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GList *unknown_pages;
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GList *stored_buffers;
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gint map;
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gboolean is_skeleton;
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gboolean have_fisbone;
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gint granulerate_n;
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gint granulerate_d;
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gint64 granule_offset;
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guint32 preroll;
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guint granuleshift;
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gint n_header_packets;
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gint n_header_packets_seen;
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gint64 accumulated_granule;
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gint frame_size;
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gint bitrate;
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guint64 total_time;
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gboolean is_sparse;
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GstCaps *caps;
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gboolean is_video;
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gboolean always_flush_page;
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/* vorbis stuff */
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int nln_increments[4];
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int nsn_increment;
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int short_size;
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int long_size;
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int vorbis_log2_num_modes;
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int vorbis_mode_sizes[256];
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int last_size;
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int version;
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gint bitrate_upper;
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gint bitrate_nominal;
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gint bitrate_lower;
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GstTagList *taglist;
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/* theora stuff */
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gboolean theora_has_zero_keyoffset;
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/* VP8 stuff */
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gboolean is_vp8;
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/* OGM stuff */
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gboolean is_ogm;
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gboolean is_ogm_text;
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/* fishead stuff */
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guint16 skeleton_major, skeleton_minor;
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gint64 prestime;
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gint64 basetime;
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/* index */
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guint n_index;
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GstOggIndex *index;
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guint64 kp_denom;
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guint64 idx_bitrate;
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};
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gboolean gst_ogg_stream_setup_map (GstOggStream * pad, ogg_packet *packet);
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gboolean gst_ogg_stream_setup_map_from_caps_headers (GstOggStream * pad,
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const GstCaps * caps);
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GstClockTime gst_ogg_stream_get_end_time_for_granulepos (GstOggStream *pad,
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gint64 granulepos);
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GstClockTime gst_ogg_stream_get_start_time_for_granulepos (GstOggStream *pad,
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gint64 granulepos);
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GstClockTime gst_ogg_stream_granule_to_time (GstOggStream *pad, gint64 granule);
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gint64 gst_ogg_stream_granulepos_to_granule (GstOggStream * pad, gint64 granulepos);
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gint64 gst_ogg_stream_granulepos_to_key_granule (GstOggStream * pad, gint64 granulepos);
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gint64 gst_ogg_stream_granule_to_granulepos (GstOggStream * pad, gint64 granule, gint64 keyframe_granule);
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GstClockTime gst_ogg_stream_get_packet_start_time (GstOggStream *pad,
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ogg_packet *packet);
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gboolean gst_ogg_stream_granulepos_is_key_frame (GstOggStream *pad,
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gint64 granulepos);
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gboolean gst_ogg_stream_packet_is_header (GstOggStream *pad, ogg_packet *packet);
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gboolean gst_ogg_stream_packet_is_key_frame (GstOggStream *pad, ogg_packet *packet);
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gint64 gst_ogg_stream_get_packet_duration (GstOggStream * pad, ogg_packet *packet);
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void gst_ogg_stream_extract_tags (GstOggStream * pad, ogg_packet * packet);
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const char *gst_ogg_stream_get_media_type (GstOggStream * pad);
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gboolean gst_ogg_map_parse_fisbone (GstOggStream * pad, const guint8 * data, guint size,
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guint32 * serialno, GstOggSkeleton *type);
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gboolean gst_ogg_map_add_fisbone (GstOggStream * pad, GstOggStream * skel_pad, const guint8 * data, guint size,
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GstClockTime * p_start_time);
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gboolean gst_ogg_map_add_index (GstOggStream * pad, GstOggStream * skel_pad, const guint8 * data, guint size);
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gboolean gst_ogg_map_search_index (GstOggStream * pad, gboolean before, guint64 *timestamp, guint64 *offset);
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G_END_DECLS
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#endif /* __GST_OGG_STREAM_H__ */
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