smacker audio: sign-extend the initial 16-bit predicted value

Fixes Bug #265 Signed-off-by: Justin Ruggles <justin.ruggles@gmail.com>
13 years ago · 12cbbbb4ab
parent b691fd7a4d
commit 12cbbbb4ab
1 changed files with 1 additions and 1 deletions
--- a/libavcodec/smacker.c
+++ b/libavcodec/smacker.c
@ -655,7 +655,7 @@ static int smka_decode_frame(AVCodecContext *avctx, void *data,
    }
    if(bits) { //decode 16-bit data
        for(i = stereo; i >= 0; i--)
-            pred[i] = av_bswap16(get_bits(&gb, 16));
+            pred[i] = sign_extend(av_bswap16(get_bits(&gb, 16)), 16);
        for(i = 0; i <= stereo; i++)
            *samples++ = pred[i];
        for(; i < unp_size / 2; i++) {