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Viewing changes to avidemux/ADM_audiofilter/audiofilter_mixer.cpp

  • Committer: Bazaar Package Importer
  • Author(s): Daniel T Chen
  • Date: 2006-12-15 17:13:20 UTC
  • mfrom: (1.1.6 upstream)
  • Revision ID: james.westby@ubuntu.com-20061215171320-w79pvpehxx2fr217
Tags: 1:2.3.0-0.0ubuntu1
* Merge from debian-multimedia.org, remaining Ubuntu change:
  - desktop file,
  - no support for ccache and make -j.
* Closes Ubuntu: #69614.

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avidemux/ADM_audiofilter/audiofilter_mixer.cpp
 
1
/***************************************************************************
 
2
         Downmixer
 
3
 ***************************************************************************/
 
4
 
 
5
 
 
6
/***************************************************************************
 
7
 *                                                                         *
 
8
 *   This program is free software; you can redistribute it and/or modify  *
 
9
 *   it under the terms of the GNU General Public License as published by  *
 
10
 *   the Free Software Foundation; either version 2 of the License, or     *
 
11
 *   (at your option) any later version.                                   *
 
12
 *                                                                         *
 
13
 ***************************************************************************/
 
14
#include "config.h"
 
15
#include <stdio.h>
 
16
#include <stdlib.h>
 
17
#include <string.h>
 
18
#include <math.h>
 
19
 
 
20
#include <ADM_assert.h>
 
21
#include "ADM_library/default.h"
 
22
 
 
23
 
 
24
#include "audioeng_process.h"
 
25
#include "audiofilter_mixer.h"
 
26
#include "audiofilter_channel_route.h"
 
27
#include "audiofilter_dolby.h"
 
28
 
 
29
 
 
30
AUDMAudioFilterMixer::AUDMAudioFilterMixer(AUDMAudioFilter *instream,CHANNEL_CONF out):AUDMAudioFilter (instream)
 
31
{
 
32
    _output=out;
 
33
    _previous->rewind();     // rewind
 
34
    ADM_assert(_output<CHANNEL_LAST);
 
35
    
 
36
    
 
37
    double d;               // Update duration
 
38
    d=_wavHeader.byterate;
 
39
    d/=_wavHeader.channels;
 
40
 
 
41
        switch (_output) {
 
42
                case CHANNEL_MONO:
 
43
                        _wavHeader.channels = 1;
 
44
                        ch_route.output_type[0] = CH_MONO;
 
45
                break;
 
46
                case CHANNEL_STEREO:
 
47
                        _wavHeader.channels = 2;
 
48
                        ch_route.output_type[0] = CH_FRONT_LEFT;
 
49
                        ch_route.output_type[1] = CH_FRONT_RIGHT;
 
50
                break;
 
51
                case CHANNEL_2F_1R:
 
52
                        _wavHeader.channels = 3;
 
53
                        ch_route.output_type[0] = CH_FRONT_LEFT;
 
54
                        ch_route.output_type[1] = CH_FRONT_RIGHT;
 
55
                        ch_route.output_type[2] = CH_REAR_CENTER;
 
56
                break;
 
57
                case CHANNEL_3F:
 
58
                        _wavHeader.channels = 3;
 
59
                        ch_route.output_type[0] = CH_FRONT_LEFT;
 
60
                        ch_route.output_type[1] = CH_FRONT_RIGHT;
 
61
                        ch_route.output_type[2] = CH_FRONT_CENTER;
 
62
                break;
 
63
                case CHANNEL_3F_1R:
 
64
                        _wavHeader.channels = 4;
 
65
                        ch_route.output_type[0] = CH_FRONT_LEFT;
 
66
                        ch_route.output_type[1] = CH_FRONT_RIGHT;
 
67
                        ch_route.output_type[2] = CH_REAR_CENTER;
 
68
                        ch_route.output_type[3] = CH_FRONT_CENTER;
 
69
                break;
 
70
                case CHANNEL_2F_2R:
 
71
                        _wavHeader.channels = 4;
 
72
                        ch_route.output_type[0] = CH_FRONT_LEFT;
 
73
                        ch_route.output_type[1] = CH_FRONT_RIGHT;
 
74
                        ch_route.output_type[2] = CH_REAR_LEFT;
 
75
                        ch_route.output_type[3] = CH_REAR_RIGHT;
 
76
                break;
 
77
                case CHANNEL_3F_2R:
 
78
                        _wavHeader.channels = 5;
 
79
                        ch_route.output_type[0] = CH_FRONT_LEFT;
 
80
                        ch_route.output_type[1] = CH_FRONT_RIGHT;
 
81
                        ch_route.output_type[2] = CH_REAR_LEFT;
 
82
                        ch_route.output_type[3] = CH_REAR_RIGHT;
 
83
                        ch_route.output_type[4] = CH_FRONT_CENTER;
 
84
                break;
 
85
                case CHANNEL_3F_2R_LFE:
 
86
                        _wavHeader.channels = 6;
 
87
                        ch_route.output_type[0] = CH_FRONT_LEFT;
 
88
                        ch_route.output_type[1] = CH_FRONT_RIGHT;
 
89
                        ch_route.output_type[2] = CH_REAR_LEFT;
 
90
                        ch_route.output_type[3] = CH_REAR_RIGHT;
 
91
                        ch_route.output_type[4] = CH_FRONT_CENTER;
 
92
                        ch_route.output_type[5] = CH_LFE;
 
93
                break;
 
94
                case CHANNEL_DOLBY_PROLOGIC:
 
95
                case CHANNEL_DOLBY_PROLOGIC2:
 
96
                        _wavHeader.channels = 2;
 
97
                        ch_route.output_type[0] = CH_FRONT_LEFT;
 
98
                        ch_route.output_type[1] = CH_FRONT_RIGHT;
 
99
                        DolbyInit();
 
100
                break;
 
101
        }
 
102
 
 
103
    d*=_wavHeader.channels;
 
104
    _wavHeader.byterate = (uint32_t)ceil(d);
 
105
 
 
106
 
 
107
//    printf("[mixer]Input channels : %u : %u \n",_previous->getInfo()->channels,input_channels);
 
108
//    printf("[mixer]Out   channels : %u : %u \n",_wavHeader.channels,ADM_channel_mixer[_output]);
 
109
 
 
110
};
 
111
 
 
112
AUDMAudioFilterMixer::~AUDMAudioFilterMixer()
 
113
{
 
114
};
 
115
 
 
116
static int MCOPY(float *in,float *out,uint32_t nbSample,uint32_t chan)
 
117
{
 
118
    memcpy(out,in,nbSample*chan*sizeof(float));
 
119
    return nbSample*chan;
 
120
    
 
121
}
 
122
 
 
123
static int MNto1(float *in,float *out,uint32_t nbSample,uint32_t chan)
 
124
{
 
125
float sum;
 
126
int den=(chan+1)&0xfe;
 
127
    for(int i=0;i<nbSample;i++)
 
128
    {
 
129
        sum=0;
 
130
        for(int j=0;j<chan;j++)
 
131
          sum+=in[j];
 
132
        out[0]=sum/(float)den;
 
133
        out++;
 
134
        in+=chan;
 
135
    }
 
136
    return nbSample;
 
137
    
 
138
}
 
139
 
 
140
static int MStereo(float *in,float *out,uint32_t nbSample,uint32_t chan)
 
141
{
 
142
        memset(out, 0, sizeof(float) * nbSample * 2);
 
143
 
 
144
        for (int i = 0; i < nbSample; i++) {
 
145
                for (int c = 0; c < chan; c++) {
 
146
                        switch (ch_route.input_type[c]) {
 
147
                                case CH_MONO:
 
148
                                case CH_FRONT_CENTER:
 
149
                                case CH_REAR_CENTER:
 
150
                                case CH_LFE:
 
151
                                        out[0]  += *in * 0.707;
 
152
                                        out[1]  += *in * 0.707;
 
153
                                break;
 
154
                                case CH_FRONT_LEFT:
 
155
                                case CH_REAR_LEFT:
 
156
                                case CH_SIDE_LEFT:
 
157
                                        out[0]  += *in;
 
158
                                break;
 
159
                                case CH_FRONT_RIGHT:
 
160
                                case CH_REAR_RIGHT:
 
161
                                case CH_SIDE_RIGHT:
 
162
                                        out[1]  += *in;
 
163
                                break;
 
164
                        }
 
165
                        in++;
 
166
                }
 
167
                out += 2;
 
168
        }
 
169
 
 
170
        return nbSample*2;
 
171
}
 
172
 
 
173
static int M2F1R(float *in,float *out,uint32_t nbSample,uint32_t chan)
 
174
{
 
175
        memset(out, 0, sizeof(float) * nbSample * 3);
 
176
 
 
177
        for (int i = 0; i < nbSample; i++) {
 
178
                for (int c = 0; c < chan; c++) {
 
179
                        switch (ch_route.input_type[c]) {
 
180
                                case CH_MONO:
 
181
                                case CH_FRONT_CENTER:
 
182
                                        out[0]  += *in * 0.707;
 
183
                                        out[1]  += *in * 0.707;
 
184
                                break;
 
185
                                case CH_FRONT_LEFT:
 
186
                                        out[0]  += *in;
 
187
                                break;
 
188
                                case CH_FRONT_RIGHT:
 
189
                                        out[1]  += *in;
 
190
                                break;
 
191
                                case CH_REAR_LEFT:
 
192
                                case CH_REAR_RIGHT:
 
193
                                case CH_REAR_CENTER:
 
194
                                        out[2]  += *in;
 
195
                                break;
 
196
                                case CH_LFE:
 
197
                                        out[0]  += *in * 0.595;
 
198
                                        out[1]  += *in * 0.595;
 
199
                                        out[2]  += *in * 0.595;
 
200
                                break;
 
201
                                case CH_SIDE_LEFT:
 
202
                                        out[0]  += *in * 0.707;
 
203
                                        out[2]  += *in * 0.707;
 
204
                                break;
 
205
                                case CH_SIDE_RIGHT:
 
206
                                        out[1]  += *in * 0.707;
 
207
                                        out[2]  += *in * 0.707;
 
208
                                break;
 
209
                        }
 
210
                        in++;
 
211
                }
 
212
                out += 3;
 
213
        }
 
214
 
 
215
        return nbSample * 3;
 
216
}
 
217
 
 
218
static int M3F(float *in,float *out,uint32_t nbSample,uint32_t chan)
 
219
{
 
220
        memset(out, 0, sizeof(float) * nbSample * 3);
 
221
 
 
222
        for (int i = 0; i < nbSample; i++) {
 
223
                for (int c = 0; c < chan; c++) {
 
224
                        switch (ch_route.input_type[c]) {
 
225
                                case CH_MONO:
 
226
                                case CH_FRONT_CENTER:
 
227
                                case CH_REAR_CENTER:
 
228
                                        out[2]  += *in;
 
229
                                break;
 
230
                                case CH_FRONT_LEFT:
 
231
                                case CH_REAR_LEFT:
 
232
                                case CH_SIDE_LEFT:
 
233
                                        out[0]  += *in;
 
234
                                break;
 
235
                                case CH_FRONT_RIGHT:
 
236
                                case CH_REAR_RIGHT:
 
237
                                case CH_SIDE_RIGHT:
 
238
                                        out[1]  += *in;
 
239
                                break;
 
240
                                case CH_LFE:
 
241
                                        out[0]  += *in * 0.595;
 
242
                                        out[1]  += *in * 0.595;
 
243
                                        out[2]  += *in * 0.595;
 
244
                                break;
 
245
                        }
 
246
                        in++;
 
247
                }
 
248
                out += 3;
 
249
        }
 
250
 
 
251
        return nbSample * 3;
 
252
}
 
253
 
 
254
static int M3F1R(float *in,float *out,uint32_t nbSample,uint32_t chan)
 
255
{
 
256
        memset(out, 0, sizeof(float) * nbSample * 4);
 
257
 
 
258
        for (int i = 0; i < nbSample; i++) {
 
259
                for (int c = 0; c < chan; c++) {
 
260
                        switch (ch_route.input_type[c]) {
 
261
                                case CH_MONO:
 
262
                                case CH_FRONT_CENTER:
 
263
                                        out[3]  += *in;
 
264
                                break;
 
265
                                case CH_REAR_CENTER:
 
266
                                case CH_REAR_LEFT:
 
267
                                case CH_REAR_RIGHT:
 
268
                                        out[2]  += *in;
 
269
                                break;
 
270
                                case CH_FRONT_LEFT:
 
271
                                        out[0]  += *in;
 
272
                                break;
 
273
                                case CH_FRONT_RIGHT:
 
274
                                        out[1]  += *in;
 
275
                                break;
 
276
                                case CH_LFE:
 
277
                                        out[0]  += *in * 0.5;
 
278
                                        out[1]  += *in * 0.5;
 
279
                                        out[2]  += *in * 0.5;
 
280
                                        out[3]  += *in * 0.5;
 
281
                                break;
 
282
                                case CH_SIDE_LEFT:
 
283
                                        out[0]  += *in * 0.707;
 
284
                                        out[2]  += *in * 0.707;
 
285
                                break;
 
286
                                case CH_SIDE_RIGHT:
 
287
                                        out[1]  += *in * 0.707;
 
288
                                        out[2]  += *in * 0.707;
 
289
                                break;
 
290
                        }
 
291
                        in++;
 
292
                }
 
293
                out += 4;
 
294
        }
 
295
 
 
296
        return nbSample * 4;
 
297
}
 
298
 
 
299
static int M2F2R(float *in,float *out,uint32_t nbSample,uint32_t chan)
 
300
{
 
301
        memset(out, 0, sizeof(float) * nbSample * 4);
 
302
 
 
303
        for (int i = 0; i < nbSample; i++) {
 
304
                for (int c = 0; c < chan; c++) {
 
305
                        switch (ch_route.input_type[c]) {
 
306
                                case CH_MONO:
 
307
                                case CH_FRONT_CENTER:
 
308
                                        out[0]  += *in * 0.707;
 
309
                                        out[1]  += *in * 0.707;
 
310
                                break;
 
311
                                case CH_FRONT_LEFT:
 
312
                                        out[0]  += *in;
 
313
                                break;
 
314
                                case CH_FRONT_RIGHT:
 
315
                                        out[1]  += *in;
 
316
                                break;
 
317
                                case CH_REAR_LEFT:
 
318
                                        out[2]  += *in;
 
319
                                break;
 
320
                                case CH_REAR_RIGHT:
 
321
                                        out[3]  += *in;
 
322
                                break;
 
323
                                case CH_REAR_CENTER:
 
324
                                        out[2]  += *in * 0.707;
 
325
                                        out[3]  += *in * 0.707;
 
326
                                break;
 
327
                                case CH_LFE:
 
328
                                        out[0]  += *in * 0.5;
 
329
                                        out[1]  += *in * 0.5;
 
330
                                        out[2]  += *in * 0.5;
 
331
                                        out[3]  += *in * 0.5;
 
332
                                break;
 
333
                                case CH_SIDE_LEFT:
 
334
                                        out[0]  += *in * 0.707;
 
335
                                        out[2]  += *in * 0.707;
 
336
                                break;
 
337
                                case CH_SIDE_RIGHT:
 
338
                                        out[1]  += *in * 0.707;
 
339
                                        out[3]  += *in * 0.707;
 
340
                                break;
 
341
                        }
 
342
                        in++;
 
343
                }
 
344
                out += 4;
 
345
        }
 
346
 
 
347
        return nbSample * 4;
 
348
}
 
349
 
 
350
static int M3F2R(float *in,float *out,uint32_t nbSample,uint32_t chan)
 
351
{
 
352
        memset(out, 0, sizeof(float) * nbSample * 5);
 
353
 
 
354
        for (int i = 0; i < nbSample; i++) {
 
355
                for (int c = 0; c < chan; c++) {
 
356
                        switch (ch_route.input_type[c]) {
 
357
                                case CH_MONO:
 
358
                                case CH_FRONT_CENTER:
 
359
                                        out[4]  += *in;
 
360
                                break;
 
361
                                case CH_FRONT_LEFT:
 
362
                                        out[0]  += *in;
 
363
                                break;
 
364
                                case CH_FRONT_RIGHT:
 
365
                                        out[1]  += *in;
 
366
                                break;
 
367
                                case CH_REAR_LEFT:
 
368
                                        out[2]  += *in;
 
369
                                break;
 
370
                                case CH_REAR_RIGHT:
 
371
                                        out[3]  += *in;
 
372
                                break;
 
373
                                case CH_REAR_CENTER:
 
374
                                        out[2]  += *in * 0.707;
 
375
                                        out[3]  += *in * 0.707;
 
376
                                break;
 
377
                                case CH_LFE:
 
378
                                        out[0]  += *in * 0.459;
 
379
                                        out[1]  += *in * 0.459;
 
380
                                        out[2]  += *in * 0.459;
 
381
                                        out[3]  += *in * 0.459;
 
382
                                        out[4]  += *in * 0.459;
 
383
                                break;
 
384
                                case CH_SIDE_LEFT:
 
385
                                        out[0]  += *in * 0.707;
 
386
                                        out[2]  += *in * 0.707;
 
387
                                break;
 
388
                                case CH_SIDE_RIGHT:
 
389
                                        out[1]  += *in * 0.707;
 
390
                                        out[3]  += *in * 0.707;
 
391
                                break;
 
392
                        }
 
393
                        in++;
 
394
                }
 
395
                out += 5;
 
396
        }
 
397
 
 
398
        return nbSample * 5;
 
399
}
 
400
 
 
401
static int M3F2RLFE(float *in,float *out,uint32_t nbSample,uint32_t chan)
 
402
{
 
403
        memset(out, 0, sizeof(float) * nbSample * 6);
 
404
 
 
405
        for (int i = 0; i < nbSample; i++) {
 
406
                for (int c = 0; c < chan; c++) {
 
407
                        switch (ch_route.input_type[c]) {
 
408
                                case CH_MONO:
 
409
                                case CH_FRONT_CENTER:
 
410
                                        out[4]  += *in;
 
411
                                break;
 
412
                                case CH_FRONT_LEFT:
 
413
                                        out[0]  += *in;
 
414
                                break;
 
415
                                case CH_FRONT_RIGHT:
 
416
                                        out[1]  += *in;
 
417
                                break;
 
418
                                case CH_REAR_LEFT:
 
419
                                        out[2]  += *in;
 
420
                                break;
 
421
                                case CH_REAR_RIGHT:
 
422
                                        out[3]  += *in;
 
423
                                break;
 
424
                                case CH_REAR_CENTER:
 
425
                                        out[2]  += *in * 0.707;
 
426
                                        out[3]  += *in * 0.707;
 
427
                                break;
 
428
                                case CH_LFE:
 
429
                                        out[5]  += *in;
 
430
                                break;
 
431
                                case CH_SIDE_LEFT:
 
432
                                        out[0]  += *in * 0.707;
 
433
                                        out[2]  += *in * 0.707;
 
434
                                break;
 
435
                                case CH_SIDE_RIGHT:
 
436
                                        out[1]  += *in * 0.707;
 
437
                                        out[3]  += *in * 0.707;
 
438
                                break;
 
439
                        }
 
440
                        in++;
 
441
                }
 
442
                out += 6;
 
443
        }
 
444
 
 
445
        return nbSample * 6;
 
446
}
 
447
 
 
448
static int MDolbyProLogic(float *in,float *out,uint32_t nbSample,uint32_t chan)
 
449
{
 
450
        memset(out, 0, sizeof(float) * nbSample * 2);
 
451
 
 
452
        for (int i = 0; i < nbSample; i++) {
 
453
                for (int c = 0; c < chan; c++) {
 
454
                        switch (ch_route.input_type[c]) {
 
455
                                case CH_MONO:
 
456
                                case CH_FRONT_CENTER:
 
457
                                case CH_LFE:
 
458
                                        out[0]  += *in * 0.707;
 
459
                                        out[1]  += *in * 0.707;
 
460
                                break;
 
461
                                case CH_FRONT_LEFT:
 
462
                                        out[0]  += *in;
 
463
                                break;
 
464
                                case CH_FRONT_RIGHT:
 
465
                                        out[1]  += *in;
 
466
                                break;
 
467
                                case CH_REAR_CENTER:
 
468
                                case CH_REAR_LEFT:
 
469
                                case CH_REAR_RIGHT:
 
470
                                        out[0]  += DolbyShiftLeft(*in) * 0.707;
 
471
                                        out[1]  += DolbyShiftRight(*in) * 0.707;
 
472
                                break;
 
473
                                case CH_SIDE_LEFT:
 
474
                                        out[0]  += *in * 0.707;
 
475
                                        out[0]  += DolbyShiftLeft(*in) * 0.707 * 0.707;
 
476
                                        out[1]  += DolbyShiftRight(*in) * 0.707 * 0.707;
 
477
                                break;
 
478
                                case CH_SIDE_RIGHT:
 
479
                                        out[1]  += *in * 0.5;
 
480
                                        out[0]  += DolbyShiftLeft(*in) * 0.707 * 0.707;
 
481
                                        out[1]  += DolbyShiftRight(*in) * 0.707 * 0.707;
 
482
                                break;
 
483
                        }
 
484
                        in++;
 
485
                }
 
486
                out += 2;
 
487
        }
 
488
 
 
489
        return nbSample*2;
 
490
}
 
491
 
 
492
static int MDolbyProLogic2(float *in,float *out,uint32_t nbSample,uint32_t chan)
 
493
{
 
494
        memset(out, 0, sizeof(float) * nbSample * 2);
 
495
 
 
496
        for (int i = 0; i < nbSample; i++) {
 
497
                for (int c = 0; c < chan; c++) {
 
498
                        switch (ch_route.input_type[c]) {
 
499
                                case CH_MONO:
 
500
                                case CH_FRONT_CENTER:
 
501
                                case CH_LFE:
 
502
                                        out[0]  += *in * 0.707;
 
503
                                        out[1]  += *in * 0.707;
 
504
                                break;
 
505
                                case CH_FRONT_LEFT:
 
506
                                        out[0]  += *in;
 
507
                                break;
 
508
                                case CH_FRONT_RIGHT:
 
509
                                        out[1]  += *in;
 
510
                                break;
 
511
                                case CH_REAR_CENTER:
 
512
                                        out[0]  += DolbyShiftLeft(*in) * 0.707;
 
513
                                        out[1]  += DolbyShiftRight(*in) * 0.707;
 
514
                                break;
 
515
                                case CH_REAR_LEFT:
 
516
                                        out[0]  += DolbyShiftLeft(*in) * 0.8165;
 
517
                                        out[1]  += DolbyShiftRight(*in) * 0.5774;
 
518
                                break;
 
519
                                case CH_REAR_RIGHT:
 
520
                                        out[0]  += DolbyShiftLeft(*in) * 0.5774;
 
521
                                        out[1]  += DolbyShiftRight(*in) * 0.8165;
 
522
                                break;
 
523
                                case CH_SIDE_LEFT:
 
524
                                        out[0]  += *in * 0.707;
 
525
                                        out[0]  += DolbyShiftLeft(*in) * 0.8165 * 0.707;
 
526
                                        out[1]  += DolbyShiftRight(*in) * 0.5774 * 0.707;
 
527
                                break;
 
528
                                case CH_SIDE_RIGHT:
 
529
                                        out[1]  += *in * 0.707;
 
530
                                        out[0]  += DolbyShiftLeft(*in) * 0.5774 * 0.707;
 
531
                                        out[1]  += DolbyShiftRight(*in) * 0.8165 * 0.707;
 
532
                                break;
 
533
                        }
 
534
                        in++;
 
535
                }
 
536
                out += 2;
 
537
        }
 
538
 
 
539
        return nbSample*2;
 
540
}
 
541
 
 
542
 
 
543
typedef int MIXER(float *in,float *out,uint32_t nbSample,uint32_t chan)  ;
 
544
 
 
545
static MIXER *matrixCall[CHANNEL_LAST] = {
 
546
NULL, MNto1, MStereo, M2F1R, M3F, M3F1R, M2F2R, M3F2R, M3F2RLFE, MDolbyProLogic, MDolbyProLogic2
 
547
};
 
548
//_____________________________________________
 
549
uint32_t AUDMAudioFilterMixer::fill(uint32_t max,float *output,AUD_Status *status)
 
550
{
 
551
 
 
552
    uint32_t rd = 0;
 
553
    uint8_t *in,*out;
 
554
    uint32_t window;
 
555
    int nbSampleMax=max/_wavHeader.channels;
 
556
    uint8_t input_channels = _previous->getInfo()->channels;
 
557
 
 
558
// Fill incoming buffer
 
559
    shrink();
 
560
    fillIncomingBuffer(status);
 
561
    // Block not filled ?
 
562
    if((_tail-_head)<input_channels)
 
563
    {
 
564
      if(*status==AUD_END_OF_STREAM && _head)
 
565
      {
 
566
        memset(&_incomingBuffer[_head],0,sizeof(float) * input_channels);
 
567
        _tail=_head+input_channels;
 
568
        printf("[Mixer] Warning asked %u symbols, a window is %u symbols\n",max,window);
 
569
      }
 
570
      else
 
571
      {
 
572
        return 0;
 
573
      }
 
574
    }
 
575
    // How many ?
 
576
 
 
577
    // Let's go
 
578
    int processed=0;
 
579
    int available=0;
 
580
    if(!nbSampleMax)
 
581
    {
 
582
      printf("[Mixer] Warning max %u, channels %u\n",max,input_channels);
 
583
    }
 
584
    available=(_tail-_head)/input_channels; // nb Sample
 
585
    ADM_assert(available);
 
586
    if(available > nbSampleMax) available=nbSampleMax;
 
587
    
 
588
    ADM_assert(available);
 
589
    
 
590
 
 
591
    // Now do the downsampling
 
592
        if (_output == CHANNEL_INVALID || ch_route.compareChType(&_wavHeader, _previous->getInfo())) {
 
593
                ch_route.copy = 1;
 
594
                rd= (uint32_t)MCOPY(&_incomingBuffer[_head],output,available,input_channels);
 
595
        } else {
 
596
                ch_route.copy = 0;
 
597
                MIXER *call=matrixCall[_output];
 
598
                rd= (uint32_t)call(&_incomingBuffer[_head],output,available,input_channels);
 
599
        }
 
600
 
 
601
    _head+=available*input_channels;
 
602
    return rd;
 
603
    
 
604
}
 
605