147 lines
4.3 KiB
C
147 lines
4.3 KiB
C
/**
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Copyright (C) 2005 Michael Ahlberg, Måns Rullgård
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Permission is hereby granted, free of charge, to any person
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obtaining a copy of this software and associated documentation
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files (the "Software"), to deal in the Software without
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restriction, including without limitation the rights to use, copy,
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modify, merge, publish, distribute, sublicense, and/or sell copies
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of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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DEALINGS IN THE SOFTWARE.
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**/
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#ifndef AVFORMAT_OGGDEC_H
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#define AVFORMAT_OGGDEC_H
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#include "avformat.h"
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#include "metadata.h"
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struct ogg_codec {
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const int8_t *magic;
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uint8_t magicsize;
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const int8_t *name;
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/**
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* Attempt to process a packet as a header
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* @return 1 if the packet was a valid header,
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* 0 if the packet was not a header (was a data packet)
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* -1 if an error occurred or for unsupported stream
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*/
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int (*header)(AVFormatContext *, int);
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int (*packet)(AVFormatContext *, int);
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/**
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* Translate a granule into a timestamp.
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* Will set dts if non-null and known.
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* @return pts
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*/
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uint64_t (*gptopts)(AVFormatContext *, int, uint64_t, int64_t *dts);
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/**
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* 1 if granule is the start time of the associated packet.
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* 0 if granule is the end time of the associated packet.
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*/
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int granule_is_start;
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};
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struct ogg_stream {
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uint8_t *buf;
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unsigned int bufsize;
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unsigned int bufpos;
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unsigned int pstart;
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unsigned int psize;
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unsigned int pflags;
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unsigned int pduration;
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uint32_t serial;
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uint64_t granule;
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int64_t lastpts;
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int64_t lastdts;
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int64_t sync_pos; ///< file offset of the first page needed to reconstruct the current packet
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int64_t page_pos; ///< file offset of the current page
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int flags;
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const struct ogg_codec *codec;
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int header;
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int nsegs, segp;
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uint8_t segments[255];
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int incomplete; ///< whether we're expecting a continuation in the next page
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int page_end; ///< current packet is the last one completed in the page
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int keyframe_seek;
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void *private;
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};
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struct ogg_state {
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uint64_t pos;
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int curidx;
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struct ogg_state *next;
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int nstreams;
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struct ogg_stream streams[1];
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};
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struct ogg {
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struct ogg_stream *streams;
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int nstreams;
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int headers;
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int curidx;
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struct ogg_state *state;
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};
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#define OGG_FLAG_CONT 1
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#define OGG_FLAG_BOS 2
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#define OGG_FLAG_EOS 4
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extern const struct ogg_codec ff_dirac_codec;
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extern const struct ogg_codec ff_flac_codec;
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extern const struct ogg_codec ff_ogm_audio_codec;
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extern const struct ogg_codec ff_ogm_old_codec;
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extern const struct ogg_codec ff_ogm_text_codec;
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extern const struct ogg_codec ff_ogm_video_codec;
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extern const struct ogg_codec ff_old_dirac_codec;
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extern const struct ogg_codec ff_old_flac_codec;
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extern const struct ogg_codec ff_skeleton_codec;
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extern const struct ogg_codec ff_speex_codec;
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extern const struct ogg_codec ff_theora_codec;
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extern const struct ogg_codec ff_vorbis_codec;
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int ff_vorbis_comment(AVFormatContext *ms, AVMetadata **m, const uint8_t *buf, int size);
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static inline int
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ogg_find_stream (struct ogg * ogg, int serial)
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{
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int i;
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for (i = 0; i < ogg->nstreams; i++)
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if (ogg->streams[i].serial == serial)
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return i;
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return -1;
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}
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static inline uint64_t
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ogg_gptopts (AVFormatContext * s, int i, uint64_t gp, int64_t *dts)
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{
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struct ogg *ogg = s->priv_data;
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struct ogg_stream *os = ogg->streams + i;
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uint64_t pts = AV_NOPTS_VALUE;
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if(os->codec && os->codec->gptopts){
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pts = os->codec->gptopts(s, i, gp, dts);
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} else {
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pts = gp;
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if (dts)
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*dts = pts;
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}
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return pts;
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}
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#endif /* AVFORMAT_OGGDEC_H */
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