[FFmpeg-cvslog] vmdaudio: correct the silent chunk count in the first block.

[Justin Ruggles]

ffmpeg | branch: master | Justin Ruggles <justin.ruggles at gmail.com> | Wed Feb 23 13:11:03 2011 -0500| [2be17a71ae1be0cdd8e7f50470f863dcb596c916] | committer: Michael Niedermayer

vmdaudio: correct the silent chunk count in the first block.

This fixes A/V sync with several samples, notably:
http://samples.mplayerhq.hu/game-formats/sierra-vmd/swat_*.vmd

Signed-off-by: Ronald S. Bultje <rsbultje at gmail.com>
(cherry picked from commit 6989cb2dae85ea455ffcc8a36a763134fb311e29)

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=2be17a71ae1be0cdd8e7f50470f863dcb596c916
---

 libavcodec/vmdav.c |    6 +-----
 1 files changed, 1 insertions(+), 5 deletions(-)

diff --git a/libavcodec/vmdav.c b/libavcodec/vmdav.c
index c6043e9..53d40a9 100644
--- a/libavcodec/vmdav.c
+++ b/libavcodec/vmdav.c
@@ -520,11 +520,7 @@ static int vmdaudio_decode_frame(AVCodecContext *avctx,
         uint32_t flags = AV_RB32(p);
         int raw_block_size = s->block_align *
                              (av_get_bits_per_sample_fmt(avctx->sample_fmt) / 8);
-        int silent_chunks;
-        if(flags == 0xFFFFFFFF)
-            silent_chunks = 32;
-        else
-            silent_chunks = av_log2(flags + 1);
+        int silent_chunks = av_popcount(flags);
         if(*data_size < (s->block_align*silent_chunks + buf_size - 20) * 2)
             return -1;
         *data_size = 0;