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-rw-r--r--libavcodec/dcadsp.c14
1 files changed, 6 insertions, 8 deletions
diff --git a/libavcodec/dcadsp.c b/libavcodec/dcadsp.c
index 8fc49cebda..294a1b2736 100644
--- a/libavcodec/dcadsp.c
+++ b/libavcodec/dcadsp.c
@@ -36,22 +36,20 @@ static inline void
dca_lfe_fir(float *out, const float *in, const float *coefs,
int decifactor)
{
- float *out2 = out + decifactor;
- const float *cf0 = coefs;
- const float *cf1 = coefs + 256;
+ float *out2 = out + 2 * decifactor - 1;
+ int num_coeffs = 256 / decifactor;
int j, k;
/* One decimated sample generates 2*decifactor interpolated ones */
for (k = 0; k < decifactor; k++) {
float v0 = 0.0;
float v1 = 0.0;
- for (j = 0; j < 256 / decifactor; j++) {
- float s = in[-j];
- v0 += s * *cf0++;
- v1 += s * *--cf1;
+ for (j = 0; j < num_coeffs; j++, coefs++) {
+ v0 += in[-j] * *coefs;
+ v1 += in[j + 1 - num_coeffs] * *coefs;
}
*out++ = v0;
- *out2++ = v1;
+ *out2-- = v1;
}
}