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Fix an overflow in the predictor.

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fixes issue 636
Patch by Jai.

Originally committed as revision 16007 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Jai Menon 2008-12-05 07:58:31 +00:00 committed by Benoit Fouet
parent 6e74619e5e
commit 3d5e1bfb20
1 changed files with 2 additions and 1 deletions
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libavcodec/alacenc.c
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@ -253,7 +253,8 @@ static void alac_linear_predictor(AlacEncodeContext *s, int ch)
sum >>= lpc.lpc_quant; sum >>= lpc.lpc_quant;
sum += samples[0]; sum += samples[0];
residual[i] = samples[lpc.lpc_order+1] - sum; residual[i] = (samples[lpc.lpc_order+1] - sum) << (32 - s->write_sample_size) >>
(32 - s->write_sample_size);
res_val = residual[i]; res_val = residual[i];
if(res_val) { if(res_val) {