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alacenc: Fix missing sign_extend()

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Fixes ticket #2497

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 8aea2f05dc56f7e7d60767dd27ba8e846a05e8ae)
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Michael Niedermayer 2013-06-13 00:01:13 +02:00 committed by Carl Eugen Hoyos
parent f6bca606f1
commit 7a472e0da9
1 changed files with 1 additions and 1 deletions
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libavcodec/alacenc.c
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@ -264,7 +264,7 @@ static void alac_linear_predictor(AlacEncodeContext *s, int ch)
// generate warm-up samples
residual[0] = samples[0];
for (i = 1; i <= lpc.lpc_order; i++)
residual[i] = samples[i] - samples[i-1];
residual[i] = sign_extend(samples[i] - samples[i-1], s->write_sample_size);
// perform lpc on remaining samples
for (i = lpc.lpc_order + 1; i < s->frame_size; i++) {