diff options
Diffstat (limited to 'libavcodec/dcadsp.c')
| -rw-r--r-- | libavcodec/dcadsp.c | 22 |
1 files changed, 11 insertions, 11 deletions
diff --git a/libavcodec/dcadsp.c b/libavcodec/dcadsp.c index 8fc49cebda..3a925fb93e 100644 --- a/libavcodec/dcadsp.c +++ b/libavcodec/dcadsp.c @@ -2,20 +2,20 @@ * Copyright (c) 2004 Gildas Bazin * Copyright (c) 2010 Mans Rullgard <mans@mansr.com> * - * This file is part of Libav. + * This file is part of FFmpeg. * - * Libav is free software; you can redistribute it and/or + * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * - * Libav is distributed in the hope that it will be useful, + * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public - * License along with Libav; if not, write to the Free Software + * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ @@ -36,22 +36,22 @@ static inline void dca_lfe_fir(float *out, const float *in, const float *coefs, int decifactor) { - float *out2 = out + decifactor; + float *out2 = out + 2*decifactor-1; const float *cf0 = coefs; - const float *cf1 = coefs + 256; + 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++, cf0++) { + v0 += in[-j] * *cf0; + v1 += in[1+j-num_coeffs] * *cf0; + } *out++ = v0; - *out2++ = v1; + *out2-- = v1; } } |