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
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
|
/*
* Copyright (c) 2019-2025 Allwinner Technology Co., Ltd. ALL rights reserved.
*
* Allwinner is a trademark of Allwinner Technology Co.,Ltd., registered in
* the the people's Republic of China and other countries.
* All Allwinner Technology Co.,Ltd. trademarks are used with permission.
*
* DISCLAIMER
* THIRD PARTY LICENCES MAY BE REQUIRED TO IMPLEMENT THE SOLUTION/PRODUCT.
* IF YOU NEED TO INTEGRATE THIRD PARTY’S TECHNOLOGY (SONY, DTS, DOLBY, AVS OR MPEGLA, ETC.)
* IN ALLWINNERS’SDK OR PRODUCTS, YOU SHALL BE SOLELY RESPONSIBLE TO OBTAIN
* ALL APPROPRIATELY REQUIRED THIRD PARTY LICENCES.
* ALLWINNER SHALL HAVE NO WARRANTY, INDEMNITY OR OTHER OBLIGATIONS WITH RESPECT TO MATTERS
* COVERED UNDER ANY REQUIRED THIRD PARTY LICENSE.
* YOU ARE SOLELY RESPONSIBLE FOR YOUR USAGE OF THIRD PARTY’S TECHNOLOGY.
*
*
* THIS SOFTWARE IS PROVIDED BY ALLWINNER"AS IS" AND TO THE MAXIMUM EXTENT
* PERMITTED BY LAW, ALLWINNER EXPRESSLY DISCLAIMS ALL WARRANTIES OF ANY KIND,
* WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING WITHOUT LIMITATION REGARDING
* THE TITLE, NON-INFRINGEMENT, ACCURACY, CONDITION, COMPLETENESS, PERFORMANCE
* OR MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
* IN NO EVENT SHALL ALLWINNER BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS, OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/* non-concurrent version, only supporting little endians */
#define generic_dmix_supported_format \
((1ULL << SND_PCM_FORMAT_S16_LE) | (1ULL << SND_PCM_FORMAT_S32_LE) |\
(1ULL << SND_PCM_FORMAT_S24_LE) | (1ULL << SND_PCM_FORMAT_S24_3LE) | \
(1ULL << SND_PCM_FORMAT_U8))
static void generic_mix_areas_16_native(unsigned int size,
volatile signed short *dst,
signed short *src,
volatile signed int *sum,
size_t dst_step,
size_t src_step,
size_t sum_step)
{
register signed int sample;
for (;;) {
sample = *src;
if (! *dst) {
*sum = sample;
*dst = *src;
} else {
sample += *sum;
*sum = sample;
if (sample > 0x7fff)
sample = 0x7fff;
else if (sample < -0x8000)
sample = -0x8000;
*dst = sample;
}
if (!--size)
return;
src = (signed short *) ((char *)src + src_step);
dst = (signed short *) ((char *)dst + dst_step);
sum = (signed int *) ((char *)sum + sum_step);
}
}
static void generic_remix_areas_16_native(unsigned int size,
volatile signed short *dst,
signed short *src,
volatile signed int *sum,
size_t dst_step,
size_t src_step,
size_t sum_step)
{
register signed int sample;
for (;;) {
sample = *src;
if (! *dst) {
*sum = -sample;
*dst = -sample;
} else {
*sum = sample = *sum - sample;
if (sample > 0x7fff)
sample = 0x7fff;
else if (sample < -0x8000)
sample = -0x8000;
*dst = sample;
}
if (!--size)
return;
src = (signed short *) ((char *)src + src_step);
dst = (signed short *) ((char *)dst + dst_step);
sum = (signed int *) ((char *)sum + sum_step);
}
}
static void generic_mix_areas_32_native(unsigned int size,
volatile signed int *dst,
signed int *src,
volatile signed int *sum,
size_t dst_step,
size_t src_step,
size_t sum_step)
{
register signed int sample;
for (;;) {
sample = *src >> 8;
if (! *dst) {
*sum = sample;
*dst = *src;
} else {
sample += *sum;
*sum = sample;
if (sample > 0x7fffff)
sample = 0x7fffffff;
else if (sample < -0x800000)
sample = -0x80000000;
else
sample *= 256;
*dst = sample;
}
if (!--size)
return;
src = (signed int *) ((char *)src + src_step);
dst = (signed int *) ((char *)dst + dst_step);
sum = (signed int *) ((char *)sum + sum_step);
}
}
static void generic_remix_areas_32_native(unsigned int size,
volatile signed int *dst,
signed int *src,
volatile signed int *sum,
size_t dst_step,
size_t src_step,
size_t sum_step)
{
register signed int sample;
for (;;) {
sample = *src >> 8;
if (! *dst) {
*sum = -sample;
*dst = -*src;
} else {
*sum = sample = *sum - sample;
if (sample > 0x7fffff)
sample = 0x7fffffff;
else if (sample < -0x800000)
sample = -0x80000000;
else
sample *= 256;
*dst = sample;
}
if (!--size)
return;
src = (signed int *) ((char *)src + src_step);
dst = (signed int *) ((char *)dst + dst_step);
sum = (signed int *) ((char *)sum + sum_step);
}
}
/* always little endian */
static void generic_mix_areas_24(unsigned int size,
volatile unsigned char *dst,
unsigned char *src,
volatile signed int *sum,
size_t dst_step,
size_t src_step,
size_t sum_step)
{
register signed int sample;
for (;;) {
sample = src[0] | (src[1] << 8) | (((signed char *)src)[2] << 16);
if (!(dst[0] | dst[1] | dst[2])) {
*sum = sample;
} else {
sample += *sum;
*sum = sample;
if (sample > 0x7fffff)
sample = 0x7fffff;
else if (sample < -0x800000)
sample = -0x800000;
}
dst[0] = sample;
dst[1] = sample >> 8;
dst[2] = sample >> 16;
if (!--size)
return;
dst += dst_step;
src += src_step;
sum = (signed int *) ((char *)sum + sum_step);
}
}
static void generic_remix_areas_24(unsigned int size,
volatile unsigned char *dst,
unsigned char *src,
volatile signed int *sum,
size_t dst_step,
size_t src_step,
size_t sum_step)
{
register signed int sample;
for (;;) {
sample = src[0] | (src[1] << 8) | (((signed char *)src)[2] << 16);
if (!(dst[0] | dst[1] | dst[2])) {
sample = -sample;
*sum = sample;
} else {
*sum = sample = *sum - sample;
if (sample > 0x7fffff)
sample = 0x7fffff;
else if (sample < -0x800000)
sample = -0x800000;
}
dst[0] = sample;
dst[1] = sample >> 8;
dst[2] = sample >> 16;
if (!--size)
return;
dst += dst_step;
src += src_step;
sum = (signed int *) ((char *)sum + sum_step);
}
}
static void generic_mix_areas_u8(unsigned int size,
volatile unsigned char *dst,
unsigned char *src,
volatile signed int *sum,
size_t dst_step,
size_t src_step,
size_t sum_step)
{
for (;;) {
register int sample = *src - 0x80;
if (*dst == 0x80) {
*sum = sample;
} else {
sample += *sum;
*sum = sample;
if (sample > 0x7f)
sample = 0x7f;
else if (sample < -0x80)
sample = -0x80;
}
*dst = sample + 0x80;
if (!--size)
return;
dst += dst_step;
src += src_step;
sum = (signed int *) ((char *)sum + sum_step);
}
}
static void generic_remix_areas_u8(unsigned int size,
volatile unsigned char *dst,
unsigned char *src,
volatile signed int *sum,
size_t dst_step,
size_t src_step,
size_t sum_step)
{
for (;;) {
register int sample = *src - 0x80;
if (*dst == 0x80) {
sample = -sample;
*sum = sample;
} else {
*sum = sample = *sum - sample;
if (sample > 0x7f)
sample = 0x7f;
else if (sample < -0x80)
sample = -0x80;
}
*dst = sample + 0x80;
if (!--size)
return;
dst += dst_step;
src += src_step;
sum = (signed int *) ((char *)sum + sum_step);
}
}
static void generic_mix_select_callbacks(snd_pcm_direct_t *dmix)
{
/* only support native version, not support swap version */
dmix->u.dmix.mix_areas_16 = generic_mix_areas_16_native;
dmix->u.dmix.mix_areas_32 = generic_mix_areas_32_native;
dmix->u.dmix.remix_areas_16 = generic_remix_areas_16_native;
dmix->u.dmix.remix_areas_32 = generic_remix_areas_32_native;
dmix->u.dmix.mix_areas_24 = generic_mix_areas_24;
dmix->u.dmix.mix_areas_u8 = generic_mix_areas_u8;
dmix->u.dmix.remix_areas_24 = generic_remix_areas_24;
dmix->u.dmix.remix_areas_u8 = generic_remix_areas_u8;
}
|
