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Code Issues Releases Activity

share streaminfo parsing function

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Originally committed as revision 13036 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Justin Ruggles 2008-05-02 21:34:34 +00:00
parent 9d48410f14
commit 9482171bbd
2 changed files with 20 additions and 8 deletions
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15
libavcodec/flac.c
View File

@ -94,7 +94,6 @@ static int64_t get_utf8(GetBitContext *gb){
return val; return val;
} }
static void metadata_streaminfo(AVCodecContext *avctx, FLACContext *s, const uint8_t *buffer);
static void allocate_buffers(FLACContext *s); static void allocate_buffers(FLACContext *s);
static int metadata_parse(FLACContext *s); static int metadata_parse(FLACContext *s);
@ -107,7 +106,7 @@ static av_cold int flac_decode_init(AVCodecContext * avctx)
/* initialize based on the demuxer-supplied streamdata header */ /* initialize based on the demuxer-supplied streamdata header */
init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size*8); init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size*8);
if (avctx->extradata_size == FLAC_STREAMINFO_SIZE) { if (avctx->extradata_size == FLAC_STREAMINFO_SIZE) {
metadata_streaminfo(avctx, s, avctx->extradata); ff_flac_parse_streaminfo(avctx, (FLACStreaminfo *)s, avctx->extradata);
allocate_buffers(s); allocate_buffers(s);
} else { } else {
metadata_parse(s); metadata_parse(s);
@ -117,9 +116,9 @@ static av_cold int flac_decode_init(AVCodecContext * avctx)
return 0; return 0;
} }
static void dump_headers(AVCodecContext *avctx, FLACContext *s) static void dump_headers(AVCodecContext *avctx, FLACStreaminfo *s)
{ {
av_log(avctx, AV_LOG_DEBUG, " Blocksize: %d .. %d (%d)\n", s->min_blocksize, s->max_blocksize, s->blocksize); av_log(avctx, AV_LOG_DEBUG, " Blocksize: %d .. %d\n", s->min_blocksize, s->max_blocksize);
av_log(avctx, AV_LOG_DEBUG, " Max Framesize: %d\n", s->max_framesize); av_log(avctx, AV_LOG_DEBUG, " Max Framesize: %d\n", s->max_framesize);
av_log(avctx, AV_LOG_DEBUG, " Samplerate: %d\n", s->samplerate); av_log(avctx, AV_LOG_DEBUG, " Samplerate: %d\n", s->samplerate);
av_log(avctx, AV_LOG_DEBUG, " Channels: %d\n", s->channels); av_log(avctx, AV_LOG_DEBUG, " Channels: %d\n", s->channels);
@ -143,8 +142,8 @@ static void allocate_buffers(FLACContext *s){
s->bitstream= av_fast_realloc(s->bitstream, &s->allocated_bitstream_size, s->max_framesize); s->bitstream= av_fast_realloc(s->bitstream, &s->allocated_bitstream_size, s->max_framesize);
} }
static void metadata_streaminfo(AVCodecContext *avctx, FLACContext *s, void ff_flac_parse_streaminfo(AVCodecContext *avctx, struct FLACStreaminfo *s,
const uint8_t *buffer) const uint8_t *buffer)
{ {
GetBitContext gb; GetBitContext gb;
init_get_bits(&gb, buffer, FLAC_STREAMINFO_SIZE*8); init_get_bits(&gb, buffer, FLAC_STREAMINFO_SIZE*8);
@ -197,7 +196,7 @@ static int metadata_parse(FLACContext *s)
if (metadata_size) { if (metadata_size) {
switch (metadata_type) { switch (metadata_type) {
case METADATA_TYPE_STREAMINFO: case METADATA_TYPE_STREAMINFO:
metadata_streaminfo(s->avctx, s, s->gb.buffer+get_bits_count(&s->gb)/8); ff_flac_parse_streaminfo(s->avctx, (FLACStreaminfo *)s, s->gb.buffer+get_bits_count(&s->gb)/8);
streaminfo_updated = 1; streaminfo_updated = 1;
default: default:
@ -573,7 +572,7 @@ static int decode_frame(FLACContext *s, int alloc_data_size)
s->bps = bps; s->bps = bps;
s->decorrelation= decorrelation; s->decorrelation= decorrelation;
// dump_headers(s->avctx, s); // dump_headers(s->avctx, (FLACStreaminfo *)s);
/* subframes */ /* subframes */
for (i = 0; i < s->channels; i++) for (i = 0; i < s->channels; i++)

13
libavcodec/flac.h
View File

@ -39,4 +39,17 @@
int channels; /**< number of channels */\ int channels; /**< number of channels */\
int bps; /**< bits-per-sample */\ int bps; /**< bits-per-sample */\
typedef struct FLACStreaminfo {
FLACSTREAMINFO
} FLACStreaminfo;
/**
* Parse the Streaminfo metadata block
* @param[out] avctx codec context to set basic stream parameters
* @param[out] s where parsed information is stored
* @param[in] buffer pointer to start of 34-byte streaminfo data
*/
void ff_flac_parse_streaminfo(AVCodecContext *avctx, struct FLACStreaminfo *s,
const uint8_t *buffer);
#endif /* FFMPEG_FLAC_H */ #endif /* FFMPEG_FLAC_H */