0,0 → 1,168 |
/** |
Copyright (C) 2005 Michael Ahlberg, Måns Rullgård |
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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. |
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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. |
**/ |
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#ifndef AVFORMAT_OGGDEC_H |
#define AVFORMAT_OGGDEC_H |
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#include "avformat.h" |
#include "metadata.h" |
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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); |
}; |
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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 |
int end_trimming; ///< set the number of packets to drop from the end |
uint8_t *new_metadata; |
unsigned int new_metadata_size; |
void *private; |
}; |
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struct ogg_state { |
uint64_t pos; |
int curidx; |
struct ogg_state *next; |
int nstreams; |
struct ogg_stream streams[1]; |
}; |
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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; |
}; |
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#define OGG_FLAG_CONT 1 |
#define OGG_FLAG_BOS 2 |
#define OGG_FLAG_EOS 4 |
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#define OGG_NOGRANULE_VALUE (-1ull) |
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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; |
extern const struct ogg_codec ff_vp8_codec; |
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int ff_vorbis_comment(AVFormatContext *ms, AVDictionary **m, |
const uint8_t *buf, int size, int parse_picture); |
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int ff_vorbis_stream_comment(AVFormatContext *as, AVStream *st, |
const uint8_t *buf, int size); |
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static inline int |
ogg_find_stream (struct ogg * ogg, int serial) |
{ |
int i; |
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for (i = 0; i < ogg->nstreams; i++) |
if (ogg->streams[i].serial == serial) |
return i; |
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return -1; |
} |
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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; |
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if(os->codec && os->codec->gptopts){ |
pts = os->codec->gptopts(s, i, gp, dts); |
} else { |
pts = gp; |
if (dts) |
*dts = pts; |
} |
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return pts; |
} |
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#endif /* AVFORMAT_OGGDEC_H */ |