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| author | Michael Niedermayer <michaelni@gmx.at> | 2003-08-20 07:57:00 +0000 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2003-08-20 07:57:00 +0000 |
| commit | 743739d2c5d271d81c971f17c49982ce7fd543a1 (patch) | |
| tree | 3c35976e47facff91bcfadb20ce5bad0dd909dc7 /libavcodec/ac3enc.c | |
| parent | b928ec649c6f836858dedd3a62909a31af20430a (diff) | |
| download | ffmpeg-743739d2c5d271d81c971f17c49982ce7fd543a1.tar.gz | |
AC3 encoding patch ba (Ross Martin <ffmpeg at ross dot interwrx dot com>)
Originally committed as revision 2129 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/ac3enc.c')
| -rw-r--r-- | libavcodec/ac3enc.c | 29 |
1 files changed, 22 insertions, 7 deletions
diff --git a/libavcodec/ac3enc.c b/libavcodec/ac3enc.c index 3e83fb1fcf..4093fb75d8 100644 --- a/libavcodec/ac3enc.c +++ b/libavcodec/ac3enc.c @@ -978,7 +978,7 @@ static void output_audio_block(AC3EncodeContext *s, int8_t global_exp[AC3_MAX_CHANNELS], int block_num) { - int ch, nb_groups, group_size, i, baie; + int ch, nb_groups, group_size, i, baie, rbnd; uint8_t *p; uint16_t qmant[AC3_MAX_CHANNELS][N/2]; int exp0, exp1; @@ -1000,14 +1000,28 @@ static void output_audio_block(AC3EncodeContext *s, put_bits(&s->pb, 1, 0); /* no new coupling strategy */ } - if (s->acmod == 2) { - put_bits(&s->pb, 1, 0); /* no matrixing (but should be used in the future) */ - } + if (s->acmod == 2) + { + if(block_num==0) + { + /* first block must define rematrixing (rematstr) */ + put_bits(&s->pb, 1, 1); + + /* dummy rematrixing rematflg(1:4)=0 */ + for (rbnd=0;rbnd<4;rbnd++) + put_bits(&s->pb, 1, 0); + } + else + { + /* no matrixing (but should be used in the future) */ + put_bits(&s->pb, 1, 0); + } + } #if defined(DEBUG) { - static int count = 0; - printf("Block #%d (%d)\n", block_num, count++); + static int count = 0; + printf("Block #%d (%d)\n", block_num, count++); } #endif /* exponent strategy */ @@ -1329,7 +1343,8 @@ static int output_frame_end(AC3EncodeContext *s) frame = s->pb.buf; n = 2 * s->frame_size - (pbBufPtr(&s->pb) - frame) - 2; assert(n >= 0); - memset(pbBufPtr(&s->pb), 0, n); + if(n>0) + memset(pbBufPtr(&s->pb), 0, n); /* Now we must compute both crcs : this is not so easy for crc1 because it is at the beginning of the data... */ |