[SCM] libav/experimental: Correctly update output sample format in wavpack decoder. Patch by Laurent Aimar (at 'fenrir (cons 'videolan 'org))
siretart at users.alioth.debian.org
siretart at users.alioth.debian.org
Sun Jun 30 16:45:01 UTC 2013
The following commit has been merged in the experimental branch:
commit 60294c593e1abb8bd90a40ae5340775db3caa594
Author: Laurent Aimar <fenrir at via.ecp.fr>
Date: Sun Apr 26 04:23:29 2009 +0000
Correctly update output sample format in wavpack decoder.
Patch by Laurent Aimar (at 'fenrir (cons 'videolan 'org))
Originally committed as revision 18694 to svn://svn.ffmpeg.org/ffmpeg/trunk
diff --git a/libavcodec/wavpack.c b/libavcodec/wavpack.c
index 4e262a2..f31402d 100644
--- a/libavcodec/wavpack.c
+++ b/libavcodec/wavpack.c
@@ -524,7 +524,7 @@ static int wavpack_decode_frame(AVCodecContext *avctx,
int got_hybrid = 0;
const uint8_t* buf_end = buf + buf_size;
int i, j, id, size, ssize, weights, t;
- int bpp = avctx->bits_per_coded_sample <= 16 ? 2 : 4;
+ int bpp;
if (buf_size == 0){
*data_size = 0;
@@ -540,18 +540,27 @@ static int wavpack_decode_frame(AVCodecContext *avctx,
*data_size = 0;
return buf_size;
}
- /* should not happen but who knows */
- if(s->samples * bpp * avctx->channels > *data_size){
- av_log(avctx, AV_LOG_ERROR, "Packet size is too big to be handled in lavc!\n");
- return -1;
- }
s->frame_flags = AV_RL32(buf); buf += 4;
+ if((s->frame_flags&0x03) <= 1){
+ bpp = 2;
+ avctx->sample_fmt = SAMPLE_FMT_S16;
+ } else {
+ bpp = 4;
+ avctx->sample_fmt = SAMPLE_FMT_S32;
+ }
s->stereo_in = (s->frame_flags & WV_FALSE_STEREO) ? 0 : s->stereo;
s->joint = s->frame_flags & WV_JOINT_STEREO;
s->hybrid = s->frame_flags & WV_HYBRID_MODE;
s->hybrid_bitrate = s->frame_flags & WV_HYBRID_BITRATE;
s->post_shift = 8 * (bpp-1-(s->frame_flags&0x03)) + ((s->frame_flags >> 13) & 0x1f);
s->CRC = AV_RL32(buf); buf += 4;
+
+ /* should not happen but who knows */
+ if(s->samples * bpp * avctx->channels > *data_size){
+ av_log(avctx, AV_LOG_ERROR, "Packet size is too big to be handled in lavc!\n");
+ return -1;
+ }
+
// parse metadata blocks
while(buf < buf_end){
id = *buf++;
--
Libav/FFmpeg packaging
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