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Make Smacker audio decoder output audio in original bit depth

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Patch by Daniel Verkamp
($firstname) at (three-letter file extension for drivers in Win 3.1) dot (nu)

Thread: [PATCH] Smacker: Output audio in original bit depth

Originally committed as revision 18111 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Daniel Verkamp 2009-03-21 15:52:14 +00:00 committed by Kostya Shishkov
parent 2bbd85719c
commit e1dc16ae56
2 changed files with 6 additions and 6 deletions
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11
libavcodec/smacker.c
View File

@ -558,7 +558,6 @@ static av_cold int decode_end(AVCodecContext *avctx)
static av_cold int smka_decode_init(AVCodecContext *avctx)
{
avctx->sample_fmt = SAMPLE_FMT_S16;
avctx->channel_layout = (avctx->channels==2) ? CH_LAYOUT_STEREO : CH_LAYOUT_MONO;
return 0;
}
@ -572,6 +571,7 @@ static int smka_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
HuffContext h[4];
VLC vlc[4];
int16_t *samples = data;
int8_t *samples8 = data;
int val;
int i, res;
int unp_size;
@ -589,7 +589,7 @@ static int smka_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
}
stereo = get_bits1(&gb);
bits = get_bits1(&gb);
if (unp_size & 0xC0000000 || (unp_size << !bits) > *data_size) {
if (unp_size & 0xC0000000 || unp_size > *data_size) {
av_log(avctx, AV_LOG_ERROR, "Frame is too large to fit in buffer\n");
return -1;
}
@ -655,7 +655,7 @@ static int smka_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
for(i = stereo; i >= 0; i--)
pred[i] = get_bits(&gb, 8);
for(i = 0; i < stereo; i++)
*samples++ = (pred[i] - 0x80) << 8;
*samples8++ = pred[i];
for(i = 0; i < unp_size; i++) {
if(i & stereo){
if(vlc[1].table)
@ -663,17 +663,16 @@ static int smka_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
else
res = 0;
pred[1] += (int8_t)h[1].values[res];
*samples++ = (pred[1] - 0x80) << 8;
*samples8++ = pred[1];
} else {
if(vlc[0].table)
res = get_vlc2(&gb, vlc[0].table, SMKTREE_BITS, 3);
else
res = 0;
pred[0] += (int8_t)h[0].values[res];
*samples++ = (pred[0] - 0x80) << 8;
*samples8++ = pred[0];
}
}
unp_size *= 2;
}
for(i = 0; i < 4; i++) {

1
libavformat/smacker.c
View File

@ -183,6 +183,7 @@ static int smacker_read_header(AVFormatContext *s, AVFormatParameters *ap)
ast[i]->codec->bits_per_coded_sample = (smk->rates[i] & SMK_AUD_16BITS) ? 16 : 8;
if(ast[i]->codec->bits_per_coded_sample == 16 && ast[i]->codec->codec_id == CODEC_ID_PCM_U8)
ast[i]->codec->codec_id = CODEC_ID_PCM_S16LE;
ast[i]->codec->sample_fmt = ast[i]->codec->bits_per_coded_sample == 8 ? SAMPLE_FMT_U8 : SAMPLE_FMT_S16;
av_set_pts_info(ast[i], 64, 1, ast[i]->codec->sample_rate
* ast[i]->codec->channels * ast[i]->codec->bits_per_coded_sample / 8);
}