1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
|
/*
* common functions for reordering audio channels
*
* Copyright (C) 2007 Ulion <ulion A gmail P com>
*
* This file is part of MPlayer.
*
* MPlayer 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 of the License, or
* (at your option) any later version.
*
* MPlayer 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 MPlayer; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <inttypes.h>
#include <string.h>
#include "audio/reorder_ch.h"
static inline void reorder_to_planar_(void *restrict out, const void *restrict in,
size_t size, size_t nchan, size_t nmemb)
{
size_t i, c;
char *outptr = (char *) out;
size_t instep = nchan * size;
for (c = 0; c < nchan; ++c) {
const char *inptr = ((const char *) in) + c * size;
for (i = 0; i < nmemb; ++i, inptr += instep, outptr += size) {
memcpy(outptr, inptr, size);
}
}
}
void reorder_to_planar(void *restrict out, const void *restrict in,
size_t size, size_t nchan, size_t nmemb)
{
// special case for mono (nothing to do...)
if (nchan == 1)
memcpy(out, in, size * nchan * nmemb);
// these calls exist to insert an inline copy of to_planar_ here with known
// value of size to help the compiler replace the memcpy calls by mov
// instructions
else if (size == 1)
reorder_to_planar_(out, in, 1, nchan, nmemb);
else if (size == 2)
reorder_to_planar_(out, in, 2, nchan, nmemb);
else if (size == 4)
reorder_to_planar_(out, in, 4, nchan, nmemb);
// general case (calls memcpy a lot, should actually never happen, but
// stays here for correctness purposes)
else
reorder_to_planar_(out, in, size, nchan, nmemb);
}
static inline void reorder_to_packed_(uint8_t *out, uint8_t **in,
size_t size, size_t nchan, size_t nmemb)
{
size_t outstep = nchan * size;
for (size_t c = 0; c < nchan; ++c) {
char *outptr = out + c * size;
char *inptr = in[c];
for (size_t i = 0; i < nmemb; ++i, outptr += outstep, inptr += size) {
memcpy(outptr, inptr, size);
}
}
}
// out = destination array of packed samples of given size, nmemb frames
// in[channel] = source array of samples for the given channel
void reorder_to_packed(uint8_t *out, uint8_t **in,
size_t size, size_t nchan, size_t nmemb)
{
if (nchan == 1)
memcpy(out, in, size * nchan * nmemb);
// See reorder_to_planar() why this is done this way
else if (size == 1)
reorder_to_packed_(out, in, 1, nchan, nmemb);
else if (size == 2)
reorder_to_packed_(out, in, 2, nchan, nmemb);
else if (size == 4)
reorder_to_packed_(out, in, 4, nchan, nmemb);
else
reorder_to_packed_(out, in, size, nchan, nmemb);
}
|
