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Calculate the correct blocksize for flash adpcm. Patch by Baptiste 

Coudurier.

Originally committed as revision 9742 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Baptiste Coudurier 2007-07-18 18:35:03 +00:00 committed by Benjamin Larsson
parent 1f48345af4
commit 9fff16bcbb
1 changed files with 10 additions and 4 deletions
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14
libavcodec/adpcm.c
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@ -183,7 +183,13 @@ static int adpcm_encode_init(AVCodecContext *avctx)
avctx->block_align = BLKSIZE;
break;
case CODEC_ID_ADPCM_SWF:
avctx->frame_size = 4*BLKSIZE * avctx->channels;
if (avctx->sample_rate != 11025 &&
avctx->sample_rate != 22050 &&
avctx->sample_rate != 44100) {
av_log(avctx, AV_LOG_ERROR, "Sample rate must be 11025, 22050 or 44100\n");
return -1;
}
avctx->frame_size = 512 * (avctx->sample_rate / 11025);
break;
default:
return -1;
@ -530,13 +536,13 @@ static int adpcm_encode_frame(AVCodecContext *avctx,
c->status[i].prev_sample = (signed short)samples[i];
}
for (i=0 ; i<4096 ; i++) {
for (i=0; i<avctx->frame_size; i++) {
put_bits(&pb, 4, adpcm_ima_compress_sample(&c->status[0], samples[avctx->channels*i]) & 0xF);
if (avctx->channels == 2)
put_bits(&pb, 4, adpcm_ima_compress_sample(&c->status[1], samples[2*i+1]) & 0xF);
}
dst += (3 + 2048) * avctx->channels;
flush_put_bits(&pb);
dst += put_bits_count(&pb)>>3;
break;
}
case CODEC_ID_ADPCM_MS: