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
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
|
/*
* Copyright (C) 2003-2014 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program 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.
*
* This program 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 this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include "PcmMix.hxx"
#include "Volume.hxx"
#include "PcmUtils.hxx"
#include "AudioFormat.hxx"
#include "Traits.hxx"
#include "util/Clamp.hxx"
#include "PcmDither.cxx" // including the .cxx file to get inlined templates
#include <assert.h>
#include <math.h>
template<SampleFormat F, class Traits=SampleTraits<F>>
static typename Traits::value_type
PcmAddVolume(PcmDither &dither,
typename Traits::value_type _a, typename Traits::value_type _b,
int volume1, int volume2)
{
typename Traits::long_type a(_a), b(_b);
typename Traits::long_type c(a * volume1 + b * volume2);
return dither.DitherShift<typename Traits::long_type,
Traits::BITS + PCM_VOLUME_BITS,
Traits::BITS>(c);
}
template<SampleFormat F, class Traits=SampleTraits<F>>
static void
PcmAddVolume(PcmDither &dither,
typename Traits::pointer_type a,
typename Traits::const_pointer_type b,
size_t n, int volume1, int volume2)
{
for (size_t i = 0; i != n; ++i)
a[i] = PcmAddVolume<F, Traits>(dither, a[i], b[i],
volume1, volume2);
}
template<SampleFormat F, class Traits=SampleTraits<F>>
static void
PcmAddVolumeVoid(PcmDither &dither,
void *a, const void *b, size_t size, int volume1, int volume2)
{
constexpr size_t sample_size = Traits::SAMPLE_SIZE;
assert(size % sample_size == 0);
PcmAddVolume<F, Traits>(dither,
typename Traits::pointer_type(a),
typename Traits::const_pointer_type(b),
size / sample_size,
volume1, volume2);
}
static void
pcm_add_vol_float(float *buffer1, const float *buffer2,
unsigned num_samples, float volume1, float volume2)
{
while (num_samples > 0) {
float sample1 = *buffer1;
float sample2 = *buffer2++;
sample1 = (sample1 * volume1 + sample2 * volume2);
*buffer1++ = sample1;
--num_samples;
}
}
static bool
pcm_add_vol(PcmDither &dither, void *buffer1, const void *buffer2, size_t size,
int vol1, int vol2,
SampleFormat format)
{
switch (format) {
case SampleFormat::UNDEFINED:
case SampleFormat::DSD:
/* not implemented */
return false;
case SampleFormat::S8:
PcmAddVolumeVoid<SampleFormat::S8>(dither,
buffer1, buffer2, size,
vol1, vol2);
return true;
case SampleFormat::S16:
PcmAddVolumeVoid<SampleFormat::S16>(dither,
buffer1, buffer2, size,
vol1, vol2);
return true;
case SampleFormat::S24_P32:
PcmAddVolumeVoid<SampleFormat::S24_P32>(dither,
buffer1, buffer2, size,
vol1, vol2);
return true;
case SampleFormat::S32:
PcmAddVolumeVoid<SampleFormat::S32>(dither,
buffer1, buffer2, size,
vol1, vol2);
return true;
case SampleFormat::FLOAT:
pcm_add_vol_float((float *)buffer1, (const float *)buffer2,
size / 4,
pcm_volume_to_float(vol1),
pcm_volume_to_float(vol2));
return true;
}
assert(false);
gcc_unreachable();
}
template<SampleFormat F, class Traits=SampleTraits<F>>
static typename Traits::value_type
PcmAdd(typename Traits::value_type _a, typename Traits::value_type _b)
{
typename Traits::sum_type a(_a), b(_b);
return PcmClamp<F, Traits>(a + b);
}
template<SampleFormat F, class Traits=SampleTraits<F>>
static void
PcmAdd(typename Traits::pointer_type a,
typename Traits::const_pointer_type b,
size_t n)
{
for (size_t i = 0; i != n; ++i)
a[i] = PcmAdd<F, Traits>(a[i], b[i]);
}
template<SampleFormat F, class Traits=SampleTraits<F>>
static void
PcmAddVoid(void *a, const void *b, size_t size)
{
constexpr size_t sample_size = Traits::SAMPLE_SIZE;
assert(size % sample_size == 0);
PcmAdd<F, Traits>(typename Traits::pointer_type(a),
typename Traits::const_pointer_type(b),
size / sample_size);
}
static void
pcm_add_float(float *buffer1, const float *buffer2, unsigned num_samples)
{
while (num_samples > 0) {
float sample1 = *buffer1;
float sample2 = *buffer2++;
*buffer1++ = sample1 + sample2;
--num_samples;
}
}
static bool
pcm_add(void *buffer1, const void *buffer2, size_t size,
SampleFormat format)
{
switch (format) {
case SampleFormat::UNDEFINED:
case SampleFormat::DSD:
/* not implemented */
return false;
case SampleFormat::S8:
PcmAddVoid<SampleFormat::S8>(buffer1, buffer2, size);
return true;
case SampleFormat::S16:
PcmAddVoid<SampleFormat::S16>(buffer1, buffer2, size);
return true;
case SampleFormat::S24_P32:
PcmAddVoid<SampleFormat::S24_P32>(buffer1, buffer2, size);
return true;
case SampleFormat::S32:
PcmAddVoid<SampleFormat::S32>(buffer1, buffer2, size);
return true;
case SampleFormat::FLOAT:
pcm_add_float((float *)buffer1, (const float *)buffer2,
size / 4);
return true;
}
assert(false);
gcc_unreachable();
}
bool
pcm_mix(PcmDither &dither, void *buffer1, const void *buffer2, size_t size,
SampleFormat format, float portion1)
{
float s;
/* portion1 is between 0.0 and 1.0 for crossfading, MixRamp uses -1
* to signal mixing rather than fading */
if (portion1 < 0)
return pcm_add(buffer1, buffer2, size, format);
s = sin(M_PI_2 * portion1);
s *= s;
int vol1 = s * PCM_VOLUME_1S + 0.5;
vol1 = Clamp<int>(vol1, 0, PCM_VOLUME_1S);
return pcm_add_vol(dither, buffer1, buffer2, size,
vol1, PCM_VOLUME_1S - vol1, format);
}
|
