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