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

Fixes Bug #265 Signed-off-by: Justin Ruggles <justin.ruggles@gmail.com>

smacker audio: sign-extend the initial 16-bit predicted value
Fixes Bug #265 Signed-off-by: Justin Ruggles <justin.ruggles@gmail.com>
12cbbbb4 · Franz Brauße · Justin Ruggles · b691fd7a · 12cbbbb4
Commit 12cbbbb4 authored Mar 30, 2012 by Franz Brauße Committed by Justin Ruggles Mar 30, 2012
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smacker.c libavcodec/smacker.c +1 -1

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--- 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++) {