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Support for WavPack version 0x410 (false stereo chunks) 

Patch by David Bryant printf("david@%s.com",wv_demuxer.long_name);
Thread [PATCH] handle WavPack stream version 0x410

Originally committed as revision 10101 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
David Bryant 2007-08-13 05:36:50 +00:00 committed by Kostya Shishkov
parent 11ead90e23
commit a6ba65f7f2
2 changed files with 26 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

36
libavcodec/wavpack.c
View File

@ -28,6 +28,7 @@
*/
#define WV_JOINT_STEREO 0x00000010
#define WV_FALSE_STEREO 0x40000000
enum WP_ID_Flags{
WP_IDF_MASK = 0x1F,
@ -66,7 +67,7 @@ typedef struct Decorr {
typedef struct WavpackContext {
AVCodecContext *avctx;
int stereo;
int stereo, stereo_in;
int joint;
uint32_t CRC;
GetBitContext gb;
@ -386,6 +387,7 @@ static int wavpack_decode_frame(AVCodecContext *avctx,
}
memset(s->decorr, 0, MAX_TERMS * sizeof(Decorr));
memset(s->median, 0, sizeof(s->median));
s->and = s->or = s->shift = 0;
s->samples = AV_RL32(buf); buf += 4;
@ -398,6 +400,7 @@ static int wavpack_decode_frame(AVCodecContext *avctx,
av_log(avctx, AV_LOG_ERROR, "Packet size is too big to be handled in lavc!\n");
return -1;
}
s->stereo_in = (AV_RL32(buf) & WV_FALSE_STEREO) ? 0 : s->stereo;
s->joint = AV_RL32(buf) & WV_JOINT_STEREO; buf += 4;
s->CRC = AV_RL32(buf); buf += 4;
// parse metadata blocks
@ -443,7 +446,7 @@ static int wavpack_decode_frame(AVCodecContext *avctx,
av_log(avctx, AV_LOG_ERROR, "No decorrelation terms met\n");
continue;
}
weights = size >> s->stereo;
weights = size >> s->stereo_in;
if(weights > MAX_TERMS || weights > s->terms){
av_log(avctx, AV_LOG_ERROR, "Too many decorrelation weights\n");
buf += ssize;
@ -454,7 +457,7 @@ static int wavpack_decode_frame(AVCodecContext *avctx,
s->decorr[s->terms - i - 1].weightA = t << 3;
if(s->decorr[s->terms - i - 1].weightA > 0)
s->decorr[s->terms - i - 1].weightA += (s->decorr[s->terms - i - 1].weightA + 64) >> 7;
if(s->stereo){
if(s->stereo_in){
t = (int8_t)(*buf++);
s->decorr[s->terms - i - 1].weightB = t << 3;
if(s->decorr[s->terms - i - 1].weightB > 0)
@ -473,7 +476,7 @@ static int wavpack_decode_frame(AVCodecContext *avctx,
if(s->decorr[i].value > 8){
s->decorr[i].samplesA[0] = wp_exp2(AV_RL16(buf)); buf += 2;
s->decorr[i].samplesA[1] = wp_exp2(AV_RL16(buf)); buf += 2;
if(s->stereo){
if(s->stereo_in){
s->decorr[i].samplesB[0] = wp_exp2(AV_RL16(buf)); buf += 2;
s->decorr[i].samplesB[1] = wp_exp2(AV_RL16(buf)); buf += 2;
t += 4;
@ -486,22 +489,22 @@ static int wavpack_decode_frame(AVCodecContext *avctx,
}else{
for(j = 0; j < s->decorr[i].value; j++){
s->decorr[i].samplesA[j] = wp_exp2(AV_RL16(buf)); buf += 2;
if(s->stereo){
if(s->stereo_in){
s->decorr[i].samplesB[j] = wp_exp2(AV_RL16(buf)); buf += 2;
}
}
t += s->decorr[i].value * 2 * avctx->channels;
t += s->decorr[i].value * 2 * (s->stereo_in + 1);
}
}
got_samples = 1;
break;
case WP_ID_ENTROPY:
if(size != 6 * avctx->channels){
av_log(avctx, AV_LOG_ERROR, "Entropy vars size should be %i, got %i", 6 * avctx->channels, size);
if(size != 6 * (s->stereo_in + 1)){
av_log(avctx, AV_LOG_ERROR, "Entropy vars size should be %i, got %i", 6 * (s->stereo_in + 1), size);
buf += ssize;
continue;
}
for(i = 0; i < 3 * avctx->channels; i++){
for(i = 0; i < 3 * (s->stereo_in + 1); i++){
s->median[i] = wp_exp2(AV_RL16(buf));
buf += 2;
}
@ -556,10 +559,21 @@ static int wavpack_decode_frame(AVCodecContext *avctx,
return -1;
}
if(s->stereo)
if(s->stereo_in)
samplecount = wv_unpack_stereo(s, &s->gb, samples);
else
else{
samplecount = wv_unpack_mono(s, &s->gb, samples);
if(s->stereo){
int16_t *dst = samples + samplecount * 2;
int16_t *src = samples + samplecount;
int cnt = samplecount;
while(cnt--){
*--dst = *--src;
*--dst = *src;
}
samplecount *= 2;
}
}
*data_size = samplecount * 2;
return buf_size;

2
libavformat/wv.c
View File

@ -86,7 +86,7 @@ static int wv_read_block_header(AVFormatContext *ctx, ByteIOContext *pb)
}
wc->blksize = size;
ver = get_le16(pb);
if(ver < 0x402 || ver > 0x40F){
if(ver < 0x402 || ver > 0x410){
av_log(ctx, AV_LOG_ERROR, "Unsupported version %03X\n", ver);
return -1;
}