yading@11: /**
yading@11:     Copyright (C) 2005  Michael Ahlberg, Måns Rullgård
yading@11: 
yading@11:     Permission is hereby granted, free of charge, to any person
yading@11:     obtaining a copy of this software and associated documentation
yading@11:     files (the "Software"), to deal in the Software without
yading@11:     restriction, including without limitation the rights to use, copy,
yading@11:     modify, merge, publish, distribute, sublicense, and/or sell copies
yading@11:     of the Software, and to permit persons to whom the Software is
yading@11:     furnished to do so, subject to the following conditions:
yading@11: 
yading@11:     The above copyright notice and this permission notice shall be
yading@11:     included in all copies or substantial portions of the Software.
yading@11: 
yading@11:     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
yading@11:     EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
yading@11:     MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
yading@11:     NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
yading@11:     HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
yading@11:     WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
yading@11:     OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
yading@11:     DEALINGS IN THE SOFTWARE.
yading@11: **/
yading@11: 
yading@11: #ifndef AVFORMAT_OGGDEC_H
yading@11: #define AVFORMAT_OGGDEC_H
yading@11: 
yading@11: #include "avformat.h"
yading@11: #include "metadata.h"
yading@11: 
yading@11: struct ogg_codec {
yading@11:     const int8_t *magic;
yading@11:     uint8_t magicsize;
yading@11:     const int8_t *name;
yading@11:     /**
yading@11:      * Attempt to process a packet as a header
yading@11:      * @return 1 if the packet was a valid header,
yading@11:      *         0 if the packet was not a header (was a data packet)
yading@11:      *         -1 if an error occurred or for unsupported stream
yading@11:      */
yading@11:     int (*header)(AVFormatContext *, int);
yading@11:     int (*packet)(AVFormatContext *, int);
yading@11:     /**
yading@11:      * Translate a granule into a timestamp.
yading@11:      * Will set dts if non-null and known.
yading@11:      * @return pts
yading@11:      */
yading@11:     uint64_t (*gptopts)(AVFormatContext *, int, uint64_t, int64_t *dts);
yading@11:     /**
yading@11:      * 1 if granule is the start time of the associated packet.
yading@11:      * 0 if granule is the end time of the associated packet.
yading@11:      */
yading@11:     int granule_is_start;
yading@11:     /**
yading@11:      * Number of expected headers
yading@11:      */
yading@11:     int nb_header;
yading@11:     void (*cleanup)(AVFormatContext *s, int idx);
yading@11: };
yading@11: 
yading@11: struct ogg_stream {
yading@11:     uint8_t *buf;
yading@11:     unsigned int bufsize;
yading@11:     unsigned int bufpos;
yading@11:     unsigned int pstart;
yading@11:     unsigned int psize;
yading@11:     unsigned int pflags;
yading@11:     unsigned int pduration;
yading@11:     uint32_t serial;
yading@11:     uint64_t granule;
yading@11:     uint64_t start_granule;
yading@11:     int64_t lastpts;
yading@11:     int64_t lastdts;
yading@11:     int64_t sync_pos;   ///< file offset of the first page needed to reconstruct the current packet
yading@11:     int64_t page_pos;   ///< file offset of the current page
yading@11:     int flags;
yading@11:     const struct ogg_codec *codec;
yading@11:     int header;
yading@11:     int nsegs, segp;
yading@11:     uint8_t segments[255];
yading@11:     int incomplete; ///< whether we're expecting a continuation in the next page
yading@11:     int page_end;   ///< current packet is the last one completed in the page
yading@11:     int keyframe_seek;
yading@11:     int got_start;
yading@11:     int got_data;   ///< 1 if the stream got some data (non-initial packets), 0 otherwise
yading@11:     int nb_header; ///< set to the number of parsed headers
yading@11:     void *private;
yading@11: };
yading@11: 
yading@11: struct ogg_state {
yading@11:     uint64_t pos;
yading@11:     int curidx;
yading@11:     struct ogg_state *next;
yading@11:     int nstreams;
yading@11:     struct ogg_stream streams[1];
yading@11: };
yading@11: 
yading@11: struct ogg {
yading@11:     struct ogg_stream *streams;
yading@11:     int nstreams;
yading@11:     int headers;
yading@11:     int curidx;
yading@11:     int64_t page_pos;                   ///< file offset of the current page
yading@11:     struct ogg_state *state;
yading@11: };
yading@11: 
yading@11: #define OGG_FLAG_CONT 1
yading@11: #define OGG_FLAG_BOS  2
yading@11: #define OGG_FLAG_EOS  4
yading@11: 
yading@11: #define OGG_NOGRANULE_VALUE (-1ull)
yading@11: 
yading@11: extern const struct ogg_codec ff_celt_codec;
yading@11: extern const struct ogg_codec ff_dirac_codec;
yading@11: extern const struct ogg_codec ff_flac_codec;
yading@11: extern const struct ogg_codec ff_ogm_audio_codec;
yading@11: extern const struct ogg_codec ff_ogm_old_codec;
yading@11: extern const struct ogg_codec ff_ogm_text_codec;
yading@11: extern const struct ogg_codec ff_ogm_video_codec;
yading@11: extern const struct ogg_codec ff_old_dirac_codec;
yading@11: extern const struct ogg_codec ff_old_flac_codec;
yading@11: extern const struct ogg_codec ff_opus_codec;
yading@11: extern const struct ogg_codec ff_skeleton_codec;
yading@11: extern const struct ogg_codec ff_speex_codec;
yading@11: extern const struct ogg_codec ff_theora_codec;
yading@11: extern const struct ogg_codec ff_vorbis_codec;
yading@11: 
yading@11: int ff_vorbis_comment(AVFormatContext *ms, AVDictionary **m, const uint8_t *buf, int size);
yading@11: 
yading@11: static inline int
yading@11: ogg_find_stream (struct ogg * ogg, int serial)
yading@11: {
yading@11:     int i;
yading@11: 
yading@11:     for (i = 0; i < ogg->nstreams; i++)
yading@11:         if (ogg->streams[i].serial == serial)
yading@11:             return i;
yading@11: 
yading@11:     return -1;
yading@11: }
yading@11: 
yading@11: static inline uint64_t
yading@11: ogg_gptopts (AVFormatContext * s, int i, uint64_t gp, int64_t *dts)
yading@11: {
yading@11:     struct ogg *ogg = s->priv_data;
yading@11:     struct ogg_stream *os = ogg->streams + i;
yading@11:     uint64_t pts = AV_NOPTS_VALUE;
yading@11: 
yading@11:     if(os->codec && os->codec->gptopts){
yading@11:         pts = os->codec->gptopts(s, i, gp, dts);
yading@11:     } else {
yading@11:         pts = gp;
yading@11:         if (dts)
yading@11:             *dts = pts;
yading@11:     }
yading@11: 
yading@11:     return pts;
yading@11: }
yading@11: 
yading@11: #endif /* AVFORMAT_OGGDEC_H */