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Diffstat (limited to 'ac3dec/downmix_c.c')
| -rw-r--r-- | ac3dec/downmix_c.c | 161 |
1 files changed, 0 insertions, 161 deletions
diff --git a/ac3dec/downmix_c.c b/ac3dec/downmix_c.c deleted file mode 100644 index 875d785..0000000 --- a/ac3dec/downmix_c.c +++ /dev/null @@ -1,161 +0,0 @@ -/* - * downmix_c.c - * - * Copyright (C) Aaron Holtzman - May 1999 - * - * This file is part of ac3dec, a free Dolby AC-3 stream decoder. - * - * ac3dec is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * ac3dec 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 General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with GNU Make; see the file COPYING. If not, write to - * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. - * - * - */ - -#include <stdlib.h> -#include <stdio.h> -#include <math.h> -#include "ac3.h" -#include "ac3_internal.h" - -#include "debug.h" -#include "downmix.h" -#include "downmix_c.h" - - -void downmix_3f_2r_to_2ch_c (float *samples, dm_par_t *dm_par) -{ - int i; - float *left, *right, *center, *left_sur, *right_sur; - float left_tmp, right_tmp; - - left = samples; - right = samples + 256 * 2; - center = samples + 256; - left_sur = samples + 256 * 3; - right_sur = samples + 256 * 4; - - for (i=0; i < 256; i++) { -#if defined DOLBY_SURROUND - left_tmp = dm_par->unit * *left + dm_par->clev * *center - dm_par->slev * (*left_sur + *right_sur); - right_tmp= dm_par->unit * *right++ + dm_par->clev * *center + dm_par->slev * (*left_sur++ + *right_sur++); -#else - left_tmp = dm_par->unit * *left + dm_par->clev * *center + dm_par->slev * *left_sur++; - right_tmp= dm_par->unit * *right++ + dm_par->clev * *center + dm_par->slev * *right_sur++; -#endif - *left++ = left_tmp; - *center++ = right_tmp; - - } -} - - -void downmix_2f_2r_to_2ch_c (float *samples, dm_par_t *dm_par) -{ - int i; - float *left, *right, *left_sur, *right_sur; - float left_tmp, right_tmp; - - left = &samples[0]; - right = &samples[256]; - left_sur = &samples[512]; - right_sur = &samples[768]; - - for (i = 0; i < 256; i++) { - left_tmp = dm_par->unit * *left + dm_par->slev * *left_sur++; - right_tmp= dm_par->unit * *right + dm_par->slev * *right_sur++; - *left++ = left_tmp; - *right++ = right_tmp; - } -} - - -void downmix_3f_1r_to_2ch_c (float *samples, dm_par_t *dm_par) -{ - int i; - float *left, *right, *center, *right_sur; - float left_tmp, right_tmp; - - left = &samples[0]; - right = &samples[512]; - center = &samples[256]; - right_sur = &samples[768]; - - for (i = 0; i < 256; i++) { - left_tmp = dm_par->unit * *left + dm_par->clev * *center - dm_par->slev * *right_sur; - right_tmp= dm_par->unit * *right++ + dm_par->clev * *center + dm_par->slev * *right_sur++; - *left++ = left_tmp; - *center++ = right_tmp; - } -} - - -void downmix_2f_1r_to_2ch_c (float *samples, dm_par_t *dm_par) -{ - int i; - float *left, *right, *right_sur; - float left_tmp, right_tmp; - - left = &samples[0]; - right = &samples[256]; - right_sur = &samples[512]; - - for (i = 0; i < 256; i++) { - left_tmp = dm_par->unit * *left - dm_par->slev * *right_sur; - right_tmp= dm_par->unit * *right + dm_par->slev * *right_sur++; - *left++ = left_tmp; - *right++ = right_tmp; - } -} - - -void downmix_3f_0r_to_2ch_c (float *samples, dm_par_t *dm_par) -{ - int i; - float *left, *right, *center; - float left_tmp, right_tmp; - - left = &samples[0]; - center = &samples[256]; - right = &samples[512]; - - for (i = 0; i < 256; i++) { - left_tmp = dm_par->unit * *left + dm_par->clev * *center; - right_tmp= dm_par->unit * *right++ + dm_par->clev * *center; - *left++ = left_tmp; - *center++ = right_tmp; - } -} - - -void stream_sample_2ch_to_s16_c (int16_t *s16_samples, float *left, float *right) -{ - int i; - - for (i=0; i < 256; i++) { - *s16_samples++ = (int16_t) *left++; - *s16_samples++ = (int16_t) *right++; - } -} - - -void stream_sample_1ch_to_s16_c (int16_t *s16_samples, float *center) -{ - int i; - float tmp; - - for (i=0; i < 256; i++) { - *s16_samples++ = tmp = (int16_t) (0.7071f * *center++); - *s16_samples++ = tmp; - } -} |