summaryrefslogtreecommitdiff
path: root/audio/mixeng.c
blob: 981b97a96485fd2460c29ebe1a7d6fc5951b26e6 (plain)
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
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
/*
 * QEMU Mixing engine
 *
 * Copyright (c) 2004-2005 Vassili Karpov (malc)
 * Copyright (c) 1998 Fabrice Bellard
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
#include "qemu/osdep.h"
#include "qemu-common.h"
#include "audio.h"

#define AUDIO_CAP "mixeng"
#include "audio_int.h"

/* 8 bit */
#define ENDIAN_CONVERSION natural
#define ENDIAN_CONVERT(v) (v)

/* Signed 8 bit */
#define BSIZE 8
#define ITYPE int
#define IN_MIN SCHAR_MIN
#define IN_MAX SCHAR_MAX
#define SIGNED
#define SHIFT 8
#include "mixeng_template.h"
#undef SIGNED
#undef IN_MAX
#undef IN_MIN
#undef BSIZE
#undef ITYPE
#undef SHIFT

/* Unsigned 8 bit */
#define BSIZE 8
#define ITYPE uint
#define IN_MIN 0
#define IN_MAX UCHAR_MAX
#define SHIFT 8
#include "mixeng_template.h"
#undef IN_MAX
#undef IN_MIN
#undef BSIZE
#undef ITYPE
#undef SHIFT

#undef ENDIAN_CONVERT
#undef ENDIAN_CONVERSION

/* Signed 16 bit */
#define BSIZE 16
#define ITYPE int
#define IN_MIN SHRT_MIN
#define IN_MAX SHRT_MAX
#define SIGNED
#define SHIFT 16
#define ENDIAN_CONVERSION natural
#define ENDIAN_CONVERT(v) (v)
#include "mixeng_template.h"
#undef ENDIAN_CONVERT
#undef ENDIAN_CONVERSION
#define ENDIAN_CONVERSION swap
#define ENDIAN_CONVERT(v) bswap16 (v)
#include "mixeng_template.h"
#undef ENDIAN_CONVERT
#undef ENDIAN_CONVERSION
#undef SIGNED
#undef IN_MAX
#undef IN_MIN
#undef BSIZE
#undef ITYPE
#undef SHIFT

/* Unsigned 16 bit */
#define BSIZE 16
#define ITYPE uint
#define IN_MIN 0
#define IN_MAX USHRT_MAX
#define SHIFT 16
#define ENDIAN_CONVERSION natural
#define ENDIAN_CONVERT(v) (v)
#include "mixeng_template.h"
#undef ENDIAN_CONVERT
#undef ENDIAN_CONVERSION
#define ENDIAN_CONVERSION swap
#define ENDIAN_CONVERT(v) bswap16 (v)
#include "mixeng_template.h"
#undef ENDIAN_CONVERT
#undef ENDIAN_CONVERSION
#undef IN_MAX
#undef IN_MIN
#undef BSIZE
#undef ITYPE
#undef SHIFT

/* Signed 32 bit */
#define BSIZE 32
#define ITYPE int
#define IN_MIN INT32_MIN
#define IN_MAX INT32_MAX
#define SIGNED
#define SHIFT 32
#define ENDIAN_CONVERSION natural
#define ENDIAN_CONVERT(v) (v)
#include "mixeng_template.h"
#undef ENDIAN_CONVERT
#undef ENDIAN_CONVERSION
#define ENDIAN_CONVERSION swap
#define ENDIAN_CONVERT(v) bswap32 (v)
#include "mixeng_template.h"
#undef ENDIAN_CONVERT
#undef ENDIAN_CONVERSION
#undef SIGNED
#undef IN_MAX
#undef IN_MIN
#undef BSIZE
#undef ITYPE
#undef SHIFT

/* Unsigned 32 bit */
#define BSIZE 32
#define ITYPE uint
#define IN_MIN 0
#define IN_MAX UINT32_MAX
#define SHIFT 32
#define ENDIAN_CONVERSION natural
#define ENDIAN_CONVERT(v) (v)
#include "mixeng_template.h"
#undef ENDIAN_CONVERT
#undef ENDIAN_CONVERSION
#define ENDIAN_CONVERSION swap
#define ENDIAN_CONVERT(v) bswap32 (v)
#include "mixeng_template.h"
#undef ENDIAN_CONVERT
#undef ENDIAN_CONVERSION
#undef IN_MAX
#undef IN_MIN
#undef BSIZE
#undef ITYPE
#undef SHIFT

t_sample *mixeng_conv[2][2][2][3] = {
    {
        {
            {
                conv_natural_uint8_t_to_mono,
                conv_natural_uint16_t_to_mono,
                conv_natural_uint32_t_to_mono
            },
            {
                conv_natural_uint8_t_to_mono,
                conv_swap_uint16_t_to_mono,
                conv_swap_uint32_t_to_mono,
            }
        },
        {
            {
                conv_natural_int8_t_to_mono,
                conv_natural_int16_t_to_mono,
                conv_natural_int32_t_to_mono
            },
            {
                conv_natural_int8_t_to_mono,
                conv_swap_int16_t_to_mono,
                conv_swap_int32_t_to_mono
            }
        }
    },
    {
        {
            {
                conv_natural_uint8_t_to_stereo,
                conv_natural_uint16_t_to_stereo,
                conv_natural_uint32_t_to_stereo
            },
            {
                conv_natural_uint8_t_to_stereo,
                conv_swap_uint16_t_to_stereo,
                conv_swap_uint32_t_to_stereo
            }
        },
        {
            {
                conv_natural_int8_t_to_stereo,
                conv_natural_int16_t_to_stereo,
                conv_natural_int32_t_to_stereo
            },
            {
                conv_natural_int8_t_to_stereo,
                conv_swap_int16_t_to_stereo,
                conv_swap_int32_t_to_stereo,
            }
        }
    }
};

f_sample *mixeng_clip[2][2][2][3] = {
    {
        {
            {
                clip_natural_uint8_t_from_mono,
                clip_natural_uint16_t_from_mono,
                clip_natural_uint32_t_from_mono
            },
            {
                clip_natural_uint8_t_from_mono,
                clip_swap_uint16_t_from_mono,
                clip_swap_uint32_t_from_mono
            }
        },
        {
            {
                clip_natural_int8_t_from_mono,
                clip_natural_int16_t_from_mono,
                clip_natural_int32_t_from_mono
            },
            {
                clip_natural_int8_t_from_mono,
                clip_swap_int16_t_from_mono,
                clip_swap_int32_t_from_mono
            }
        }
    },
    {
        {
            {
                clip_natural_uint8_t_from_stereo,
                clip_natural_uint16_t_from_stereo,
                clip_natural_uint32_t_from_stereo
            },
            {
                clip_natural_uint8_t_from_stereo,
                clip_swap_uint16_t_from_stereo,
                clip_swap_uint32_t_from_stereo
            }
        },
        {
            {
                clip_natural_int8_t_from_stereo,
                clip_natural_int16_t_from_stereo,
                clip_natural_int32_t_from_stereo
            },
            {
                clip_natural_int8_t_from_stereo,
                clip_swap_int16_t_from_stereo,
                clip_swap_int32_t_from_stereo
            }
        }
    }
};

/*
 * August 21, 1998
 * Copyright 1998 Fabrice Bellard.
 *
 * [Rewrote completly the code of Lance Norskog And Sundry
 * Contributors with a more efficient algorithm.]
 *
 * This source code is freely redistributable and may be used for
 * any purpose.  This copyright notice must be maintained.
 * Lance Norskog And Sundry Contributors are not responsible for
 * the consequences of using this software.
 */

/*
 * Sound Tools rate change effect file.
 */
/*
 * Linear Interpolation.
 *
 * The use of fractional increment allows us to use no buffer. It
 * avoid the problems at the end of the buffer we had with the old
 * method which stored a possibly big buffer of size
 * lcm(in_rate,out_rate).
 *
 * Limited to 16 bit samples and sampling frequency <= 65535 Hz. If
 * the input & output frequencies are equal, a delay of one sample is
 * introduced.  Limited to processing 32-bit count worth of samples.
 *
 * 1 << FRAC_BITS evaluating to zero in several places.  Changed with
 * an (unsigned long) cast to make it safe.  MarkMLl 2/1/99
 */

/* Private data */
struct rate {
    uint64_t opos;
    uint64_t opos_inc;
    uint32_t ipos;              /* position in the input stream (integer) */
    struct st_sample ilast;          /* last sample in the input stream */
};

/*
 * Prepare processing.
 */
void *st_rate_start (int inrate, int outrate)
{
    struct rate *rate = audio_calloc (AUDIO_FUNC, 1, sizeof (*rate));

    if (!rate) {
        dolog ("Could not allocate resampler (%zu bytes)\n", sizeof (*rate));
        return NULL;
    }

    rate->opos = 0;

    /* increment */
    rate->opos_inc = ((uint64_t) inrate << 32) / outrate;

    rate->ipos = 0;
    rate->ilast.l = 0;
    rate->ilast.r = 0;
    return rate;
}

#define NAME st_rate_flow_mix
#define OP(a, b) a += b
#include "rate_template.h"

#define NAME st_rate_flow
#define OP(a, b) a = b
#include "rate_template.h"

void st_rate_stop (void *opaque)
{
    g_free (opaque);
}

void mixeng_clear (struct st_sample *buf, int len)
{
    memset (buf, 0, len * sizeof (struct st_sample));
}

void mixeng_volume (struct st_sample *buf, int len, struct mixeng_volume *vol)
{
    if (vol->mute) {
        mixeng_clear (buf, len);
        return;
    }

    while (len--) {
#ifdef FLOAT_MIXENG
        buf->l = buf->l * vol->l;
        buf->r = buf->r * vol->r;
#else
        buf->l = (buf->l * vol->l) >> 32;
        buf->r = (buf->r * vol->r) >> 32;
#endif
        buf += 1;
    }
}