flacdec: add planar output support
[libav.git] / libavcodec / flacdsp_template.c
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1/*
2 * Copyright (c) 2012 Mans Rullgard <mans@mansr.com>
3 *
4 * This file is part of Libav.
5 *
6 * Libav 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.
10 *
11 * Libav 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.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with Libav; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21#include <stdint.h>
784514a4 22#include "libavutil/avutil.h"
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23
24#undef FUNC
784514a4 25#undef FSUF
4a852834 26#undef sample
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27#undef sample_type
28#undef OUT
29#undef S
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30
31#if SAMPLE_SIZE == 32
784514a4 32# define sample_type int32_t
4a852834 33#else
784514a4 34# define sample_type int16_t
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35#endif
36
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37#if PLANAR
38# define FSUF AV_JOIN(SAMPLE_SIZE, p)
39# define sample sample_type *
40# define OUT(n) n
41# define S(s, c, i) (s[c][i])
42#else
43# define FSUF SAMPLE_SIZE
44# define sample sample_type
45# define OUT(n) n[0]
46# define S(s, c, i) (*s++)
47#endif
48
49#define FUNC(n) AV_JOIN(n ## _, FSUF)
50
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51static void FUNC(flac_decorrelate_indep_c)(uint8_t **out, int32_t **in,
52 int channels, int len, int shift)
53{
784514a4 54 sample *samples = (sample *) OUT(out);
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55 int i, j;
56
57 for (j = 0; j < len; j++)
58 for (i = 0; i < channels; i++)
784514a4 59 S(samples, i, j) = in[i][j] << shift;
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60}
61
62static void FUNC(flac_decorrelate_ls_c)(uint8_t **out, int32_t **in,
63 int channels, int len, int shift)
64{
784514a4 65 sample *samples = (sample *) OUT(out);
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66 int i;
67
68 for (i = 0; i < len; i++) {
69 int a = in[0][i];
70 int b = in[1][i];
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71 S(samples, 0, i) = a << shift;
72 S(samples, 1, i) = (a - b) << shift;
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73 }
74}
75
76static void FUNC(flac_decorrelate_rs_c)(uint8_t **out, int32_t **in,
77 int channels, int len, int shift)
78{
784514a4 79 sample *samples = (sample *) OUT(out);
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80 int i;
81
82 for (i = 0; i < len; i++) {
83 int a = in[0][i];
84 int b = in[1][i];
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85 S(samples, 0, i) = (a + b) << shift;
86 S(samples, 1, i) = b << shift;
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87 }
88}
89
90static void FUNC(flac_decorrelate_ms_c)(uint8_t **out, int32_t **in,
91 int channels, int len, int shift)
92{
784514a4 93 sample *samples = (sample *) OUT(out);
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94 int i;
95
96 for (i = 0; i < len; i++) {
97 int a = in[0][i];
98 int b = in[1][i];
99 a -= b >> 1;
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100 S(samples, 0, i) = (a + b) << shift;
101 S(samples, 1, i) = a << shift;
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102 }
103}