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
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
|
/*
* Copyright (C) 2003-2011 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 "pcm_format.h"
#include "pcm_dither.h"
#include "pcm_buffer.h"
#include "pcm_pack.h"
static void
pcm_convert_8_to_16(int16_t *out, const int8_t *in,
unsigned num_samples)
{
while (num_samples > 0) {
*out++ = *in++ << 8;
--num_samples;
}
}
static void
pcm_convert_24_to_16(struct pcm_dither *dither,
int16_t *out, const int32_t *in,
unsigned num_samples)
{
pcm_dither_24_to_16(dither, out, in, num_samples);
}
static void
pcm_convert_32_to_16(struct pcm_dither *dither,
int16_t *out, const int32_t *in,
unsigned num_samples)
{
pcm_dither_32_to_16(dither, out, in, num_samples);
}
static int32_t *
pcm_convert_24_to_24p32(struct pcm_buffer *buffer, const uint8_t *src,
unsigned num_samples)
{
int32_t *dest = pcm_buffer_get(buffer, num_samples * 4);
pcm_unpack_24(dest, src, src + num_samples * 3, false);
return dest;
}
const int16_t *
pcm_convert_to_16(struct pcm_buffer *buffer, struct pcm_dither *dither,
enum sample_format src_format, const void *src,
size_t src_size, size_t *dest_size_r)
{
unsigned num_samples;
int16_t *dest;
int32_t *dest32;
switch (src_format) {
case SAMPLE_FORMAT_UNDEFINED:
break;
case SAMPLE_FORMAT_S8:
num_samples = src_size;
*dest_size_r = src_size * sizeof(*dest);
dest = pcm_buffer_get(buffer, *dest_size_r);
pcm_convert_8_to_16(dest,
(const int8_t *)src,
num_samples);
return dest;
case SAMPLE_FORMAT_S16:
*dest_size_r = src_size;
return src;
case SAMPLE_FORMAT_S24:
/* convert to S24_P32 first */
num_samples = src_size / 3;
dest32 = pcm_convert_24_to_24p32(buffer, src, num_samples);
dest = (int16_t *)dest32;
/* convert to 16 bit in-place */
*dest_size_r = num_samples * sizeof(*dest);
pcm_convert_24_to_16(dither, dest, dest32,
num_samples);
return dest;
case SAMPLE_FORMAT_S24_P32:
num_samples = src_size / 4;
*dest_size_r = num_samples * sizeof(*dest);
dest = pcm_buffer_get(buffer, *dest_size_r);
pcm_convert_24_to_16(dither, dest,
(const int32_t *)src,
num_samples);
return dest;
case SAMPLE_FORMAT_S32:
num_samples = src_size / 4;
*dest_size_r = num_samples * sizeof(*dest);
dest = pcm_buffer_get(buffer, *dest_size_r);
pcm_convert_32_to_16(dither, dest,
(const int32_t *)src,
num_samples);
return dest;
}
return NULL;
}
static void
pcm_convert_8_to_24(int32_t *out, const int8_t *in,
unsigned num_samples)
{
while (num_samples > 0) {
*out++ = *in++ << 16;
--num_samples;
}
}
static void
pcm_convert_16_to_24(int32_t *out, const int16_t *in,
unsigned num_samples)
{
while (num_samples > 0) {
*out++ = *in++ << 8;
--num_samples;
}
}
static void
pcm_convert_32_to_24(int32_t *out, const int32_t *in,
unsigned num_samples)
{
while (num_samples > 0) {
*out++ = *in++ >> 8;
--num_samples;
}
}
const int32_t *
pcm_convert_to_24(struct pcm_buffer *buffer,
enum sample_format src_format, const void *src,
size_t src_size, size_t *dest_size_r)
{
unsigned num_samples;
int32_t *dest;
switch (src_format) {
case SAMPLE_FORMAT_UNDEFINED:
break;
case SAMPLE_FORMAT_S8:
num_samples = src_size;
*dest_size_r = src_size * sizeof(*dest);
dest = pcm_buffer_get(buffer, *dest_size_r);
pcm_convert_8_to_24(dest, (const int8_t *)src,
num_samples);
return dest;
case SAMPLE_FORMAT_S16:
num_samples = src_size / 2;
*dest_size_r = num_samples * sizeof(*dest);
dest = pcm_buffer_get(buffer, *dest_size_r);
pcm_convert_16_to_24(dest, (const int16_t *)src,
num_samples);
return dest;
case SAMPLE_FORMAT_S24:
num_samples = src_size / 3;
*dest_size_r = num_samples * sizeof(*dest);
return pcm_convert_24_to_24p32(buffer, src, num_samples);
case SAMPLE_FORMAT_S24_P32:
*dest_size_r = src_size;
return src;
case SAMPLE_FORMAT_S32:
num_samples = src_size / 4;
*dest_size_r = num_samples * sizeof(*dest);
dest = pcm_buffer_get(buffer, *dest_size_r);
pcm_convert_32_to_24(dest, (const int32_t *)src,
num_samples);
return dest;
}
return NULL;
}
static void
pcm_convert_8_to_32(int32_t *out, const int8_t *in,
unsigned num_samples)
{
while (num_samples > 0) {
*out++ = *in++ << 24;
--num_samples;
}
}
static void
pcm_convert_16_to_32(int32_t *out, const int16_t *in,
unsigned num_samples)
{
while (num_samples > 0) {
*out++ = *in++ << 16;
--num_samples;
}
}
static void
pcm_convert_24_to_32(int32_t *out, const int32_t *in,
unsigned num_samples)
{
while (num_samples > 0) {
*out++ = *in++ << 8;
--num_samples;
}
}
const int32_t *
pcm_convert_to_32(struct pcm_buffer *buffer,
enum sample_format src_format, const void *src,
size_t src_size, size_t *dest_size_r)
{
unsigned num_samples;
int32_t *dest;
switch (src_format) {
case SAMPLE_FORMAT_UNDEFINED:
break;
case SAMPLE_FORMAT_S8:
num_samples = src_size;
*dest_size_r = src_size * sizeof(*dest);
dest = pcm_buffer_get(buffer, *dest_size_r);
pcm_convert_8_to_32(dest, (const int8_t *)src,
num_samples);
return dest;
case SAMPLE_FORMAT_S16:
num_samples = src_size / 2;
*dest_size_r = num_samples * sizeof(*dest);
dest = pcm_buffer_get(buffer, *dest_size_r);
pcm_convert_16_to_32(dest, (const int16_t *)src,
num_samples);
return dest;
case SAMPLE_FORMAT_S24:
/* convert to S24_P32 first */
num_samples = src_size / 3;
dest = pcm_convert_24_to_24p32(buffer, src, num_samples);
/* convert to 32 bit in-place */
*dest_size_r = num_samples * sizeof(*dest);
pcm_convert_24_to_32(dest, dest, num_samples);
return dest;
case SAMPLE_FORMAT_S24_P32:
num_samples = src_size / 4;
*dest_size_r = num_samples * sizeof(*dest);
dest = pcm_buffer_get(buffer, *dest_size_r);
pcm_convert_24_to_32(dest, (const int32_t *)src,
num_samples);
return dest;
case SAMPLE_FORMAT_S32:
*dest_size_r = src_size;
return src;
}
return NULL;
}
|
