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Diffstat (limited to 'ffmpeg/libavformat/oggdec.h')
| -rw-r--r-- | ffmpeg/libavformat/oggdec.h | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/ffmpeg/libavformat/oggdec.h b/ffmpeg/libavformat/oggdec.h new file mode 100644 index 0000000..e9a300d --- /dev/null +++ b/ffmpeg/libavformat/oggdec.h @@ -0,0 +1,160 @@ +/** + 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; + void (*cleanup)(AVFormatContext *s, int idx); +}; + +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; + int64_t page_pos; ///< file offset of the current page + 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 */ |