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
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
|
/* GStreamer
* Copyright (C) 2010 Mark Nauwelaerts <mark.nauwelaerts@collabora.co.uk>
* Copyright (C) 2010 Nokia Corporation. All rights reserved.
* Contact: Stefan Kost <stefan.kost@nokia.com>
*
* Tremor modifications <2006>:
* Chris Lord, OpenedHand Ltd. <chris@openedhand.com>, http://www.o-hand.com/
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstvorbisdeclib.h"
#ifndef TREMOR
/* These samples can be outside of the float -1.0 -- 1.0 range, this
* is allowed, downstream elements are supposed to clip */
void
copy_samples (vorbis_sample_t * out, vorbis_sample_t ** in, guint samples,
gint channels, gint width)
{
gint i, j;
g_assert (width == 4);
#ifdef GST_VORBIS_DEC_SEQUENTIAL
for (i = 0; i < channels; i++) {
memcpy (out, in[i], samples * sizeof (float));
out += samples;
}
#else
for (j = 0; j < samples; j++) {
for (i = 0; i < channels; i++) {
*out++ = in[i][j];
}
}
#endif
}
#else
/* Taken from Tremor, misc.h */
#ifdef _ARM_ASSEM_
static inline ogg_int32_t
CLIP_TO_15 (ogg_int32_t x)
{
int tmp;
asm volatile ("subs %1, %0, #32768\n\t"
"movpl %0, #0x7f00\n\t"
"orrpl %0, %0, #0xff\n"
"adds %1, %0, #32768\n\t"
"movmi %0, #0x8000":"+r" (x), "=r" (tmp)
::"cc");
return (x);
}
#else
static inline ogg_int32_t
CLIP_TO_15 (ogg_int32_t x)
{
int ret = x;
ret -= ((x <= 32767) - 1) & (x - 32767);
ret -= ((x >= -32768) - 1) & (x + 32768);
return (ret);
}
#endif
static void
copy_samples_32 (gint32 * out, ogg_int32_t ** in, guint samples, gint channels)
{
gint i, j;
for (j = 0; j < samples; j++) {
for (i = 0; i < channels; i++) {
*out++ = CLIP_TO_15 (in[i][j] >> 9);
}
}
}
static void
copy_samples_16 (gint16 * out, ogg_int32_t ** in, guint samples, gint channels)
{
gint i, j;
for (j = 0; j < samples; j++) {
for (i = 0; i < channels; i++) {
*out++ = CLIP_TO_15 (in[i][j] >> 9);
}
}
}
void
copy_samples (vorbis_sample_t * out, vorbis_sample_t ** in, guint samples,
gint channels, gint width)
{
if (width == 4) {
copy_samples_32 ((gint32 *) out, in, samples, channels);
} else if (width == 2) {
copy_samples_16 ((gint16 *) out, in, samples, channels);
} else {
g_assert_not_reached ();
}
}
#endif
|
