mirror of https://git.ffmpeg.org/ffmpeg.git
87 lines
2.4 KiB
C
87 lines
2.4 KiB
C
/*
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* Copyright (c) 2012 Mans Rullgard <mans@mansr.com>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <stdint.h>
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#undef FUNC
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#undef sample
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#if SAMPLE_SIZE == 32
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# define FUNC(n) n ## _32
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# define sample int32_t
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#else
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# define FUNC(n) n ## _16
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# define sample int16_t
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#endif
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static void FUNC(flac_decorrelate_indep_c)(uint8_t **out, int32_t **in,
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int channels, int len, int shift)
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{
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sample *samples = (sample *) out[0];
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int i, j;
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for (j = 0; j < len; j++)
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for (i = 0; i < channels; i++)
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*samples++ = in[i][j] << shift;
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}
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static void FUNC(flac_decorrelate_ls_c)(uint8_t **out, int32_t **in,
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int channels, int len, int shift)
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{
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sample *samples = (sample *) out[0];
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int i;
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for (i = 0; i < len; i++) {
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int a = in[0][i];
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int b = in[1][i];
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*samples++ = a << shift;
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*samples++ = (a - b) << shift;
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}
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}
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static void FUNC(flac_decorrelate_rs_c)(uint8_t **out, int32_t **in,
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int channels, int len, int shift)
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{
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sample *samples = (sample *) out[0];
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int i;
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for (i = 0; i < len; i++) {
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int a = in[0][i];
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int b = in[1][i];
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*samples++ = (a + b) << shift;
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*samples++ = b << shift;
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}
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}
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static void FUNC(flac_decorrelate_ms_c)(uint8_t **out, int32_t **in,
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int channels, int len, int shift)
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{
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sample *samples = (sample *) out[0];
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int i;
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for (i = 0; i < len; i++) {
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int a = in[0][i];
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int b = in[1][i];
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a -= b >> 1;
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*samples++ = (a + b) << shift;
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*samples++ = a << shift;
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}
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}
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