---
libavcodec/alac.c | 14 ++++++--------
1 files changed, 6 insertions(+), 8 deletions(-)
diff --git a/libavcodec/alac.c b/libavcodec/alac.c
index f48079c..eeb888e 100644
--- a/libavcodec/alac.c
+++ b/libavcodec/alac.c
@@ -201,29 +201,29 @@ static void predictor_decompress_fir_adapt(int32_t
*error_buffer,
/* NOTE: 4 and 8 are very common cases that could be optimized. */
/* general case */
- for (i = predictor_coef_num + 1; i < output_size; i++) {
+ for (i = predictor_coef_num; i < output_size - 1; i++) {
int j;
int val = 0;
- int error_val = error_buffer[i];
+ int error_val = error_buffer[i + 1];
int error_sign;
for (j = 0; j < predictor_coef_num; j++) {
- val += (buffer_out[predictor_coef_num-j] - buffer_out[0]) *
+ val += (buffer_out[i - j] - buffer_out[i - predictor_coef_num]) *
predictor_coef_table[j];
}
val = (val + (1 << (predictor_quantitization - 1))) >>
predictor_quantitization;
- val += buffer_out[0] + error_val;
+ val += buffer_out[i - predictor_coef_num] + error_val;
- buffer_out[predictor_coef_num + 1] = sign_extend(val, readsamplesize);
+ buffer_out[i + 1] = sign_extend(val, readsamplesize);
/* adapt LPC coefficients */
error_sign = sign_only(error_val);
if (error_sign) {
for (j = predictor_coef_num - 1; j >= 0 && error_val * error_sign
> 0; j--) {
int sign;
- val = buffer_out[0] - buffer_out[predictor_coef_num - j];
+ val = buffer_out[i - predictor_coef_num] - buffer_out[i - j];
sign = sign_only(val) * error_sign;
predictor_coef_table[j] -= sign;
val *= sign;
@@ -231,8 +231,6 @@ static void predictor_decompress_fir_adapt(int32_t
*error_buffer,
(predictor_coef_num - j));
}
}
-
- buffer_out++;
}
}
--
1.7.1
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