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Reset internal state on corrupted blocks in wavpack decoder.

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wavpack_decode_block() supposes that it is called back with the exact
same buffer unless it has returned with an error. With multi-channels
files, wavpack_decode_frame() was breaking this assumption.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit c2a016ad4d9c29285813ba5806189e63e063e0fb)
This commit is contained in:
Laurent Aimar 2011-09-26 23:37:30 +02:00 committed by Michael Niedermayer
parent 9770127cd8
commit 9851184d30
1 changed files with 13 additions and 1 deletions
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14
libavcodec/wavpack.c
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@ -1173,6 +1173,15 @@ static int wavpack_decode_block(AVCodecContext *avctx, int block_no,
return samplecount * bpp;
}
static void wavpack_decode_flush(AVCodecContext *avctx)
{
WavpackContext *s = avctx->priv_data;
int i;
for (i = 0; i < s->fdec_num; i++)
wv_reset_saved_context(s->fdec[i]);
}
static int wavpack_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
AVPacket *avpkt)
@ -1205,11 +1214,14 @@ static int wavpack_decode_frame(AVCodecContext *avctx,
if(frame_size < 0 || frame_size > buf_size){
av_log(avctx, AV_LOG_ERROR, "Block %d has invalid size (size %d vs. %d bytes left)\n",
s->block, frame_size, buf_size);
wavpack_decode_flush(avctx);
return -1;
}
if((samplecount = wavpack_decode_block(avctx, s->block, data,
data_size, buf, frame_size)) < 0)
data_size, buf, frame_size)) < 0) {
wavpack_decode_flush(avctx);
return -1;
}
s->block++;
buf += frame_size; buf_size -= frame_size;
}