2 * Copyright (c) 2012 Mans Rullgard <mans@mansr.com>
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/avutil.h"
32 # define sample_type int32_t
34 # define sample_type int16_t
38 # define FSUF AV_JOIN(SAMPLE_SIZE, p)
39 # define sample sample_type *
41 # define S(s, c, i) (s[c][i])
43 # define FSUF SAMPLE_SIZE
44 # define sample sample_type
46 # define S(s, c, i) (*s++)
49 #define FUNC(n) AV_JOIN(n ## _, FSUF)
51 static void FUNC(flac_decorrelate_indep_c)(uint8_t **out, int32_t **in,
52 int channels, int len, int shift)
54 sample *samples = (sample *) OUT(out);
57 for (j = 0; j < len; j++)
58 for (i = 0; i < channels; i++)
59 S(samples, i, j) = (int)((unsigned)in[i][j] << shift);
62 static void FUNC(flac_decorrelate_ls_c)(uint8_t **out, int32_t **in,
63 int channels, int len, int shift)
65 sample *samples = (sample *) OUT(out);
68 for (i = 0; i < len; i++) {
69 unsigned a = in[0][i];
70 unsigned b = in[1][i];
71 S(samples, 0, i) = a << shift;
72 S(samples, 1, i) = (a - b) << shift;
76 static void FUNC(flac_decorrelate_rs_c)(uint8_t **out, int32_t **in,
77 int channels, int len, int shift)
79 sample *samples = (sample *) OUT(out);
82 for (i = 0; i < len; i++) {
83 unsigned a = in[0][i];
84 unsigned b = in[1][i];
85 S(samples, 0, i) = (a + b) << shift;
86 S(samples, 1, i) = b << shift;
90 static void FUNC(flac_decorrelate_ms_c)(uint8_t **out, int32_t **in,
91 int channels, int len, int shift)
93 sample *samples = (sample *) OUT(out);
96 for (i = 0; i < len; i++) {
97 unsigned a = in[0][i];
100 S(samples, 0, i) = (a + b) << shift;
101 S(samples, 1, i) = a << shift;