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
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
|
/**
* OpenAL cross platform audio library
* Copyright (C) 1999-2007 by authors.
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
* Or go to http://www.gnu.org/copyleft/lgpl.html
*/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "alMain.h"
#include "alu.h"
#include "alconfig.h"
#include "ringbuffer.h"
#include "compat.h"
#include "backends/base.h"
#include <portaudio.h>
static const ALCchar pa_device[] = "PortAudio Default";
#ifdef HAVE_DYNLOAD
static void *pa_handle;
#define MAKE_FUNC(x) static __typeof(x) * p##x
MAKE_FUNC(Pa_Initialize);
MAKE_FUNC(Pa_Terminate);
MAKE_FUNC(Pa_GetErrorText);
MAKE_FUNC(Pa_StartStream);
MAKE_FUNC(Pa_StopStream);
MAKE_FUNC(Pa_OpenStream);
MAKE_FUNC(Pa_CloseStream);
MAKE_FUNC(Pa_GetDefaultOutputDevice);
MAKE_FUNC(Pa_GetDefaultInputDevice);
MAKE_FUNC(Pa_GetStreamInfo);
#undef MAKE_FUNC
#define Pa_Initialize pPa_Initialize
#define Pa_Terminate pPa_Terminate
#define Pa_GetErrorText pPa_GetErrorText
#define Pa_StartStream pPa_StartStream
#define Pa_StopStream pPa_StopStream
#define Pa_OpenStream pPa_OpenStream
#define Pa_CloseStream pPa_CloseStream
#define Pa_GetDefaultOutputDevice pPa_GetDefaultOutputDevice
#define Pa_GetDefaultInputDevice pPa_GetDefaultInputDevice
#define Pa_GetStreamInfo pPa_GetStreamInfo
#endif
static ALCboolean pa_load(void)
{
PaError err;
#ifdef HAVE_DYNLOAD
if(!pa_handle)
{
#ifdef _WIN32
# define PALIB "portaudio.dll"
#elif defined(__APPLE__) && defined(__MACH__)
# define PALIB "libportaudio.2.dylib"
#elif defined(__OpenBSD__)
# define PALIB "libportaudio.so"
#else
# define PALIB "libportaudio.so.2"
#endif
pa_handle = LoadLib(PALIB);
if(!pa_handle)
return ALC_FALSE;
#define LOAD_FUNC(f) do { \
p##f = GetSymbol(pa_handle, #f); \
if(p##f == NULL) \
{ \
CloseLib(pa_handle); \
pa_handle = NULL; \
return ALC_FALSE; \
} \
} while(0)
LOAD_FUNC(Pa_Initialize);
LOAD_FUNC(Pa_Terminate);
LOAD_FUNC(Pa_GetErrorText);
LOAD_FUNC(Pa_StartStream);
LOAD_FUNC(Pa_StopStream);
LOAD_FUNC(Pa_OpenStream);
LOAD_FUNC(Pa_CloseStream);
LOAD_FUNC(Pa_GetDefaultOutputDevice);
LOAD_FUNC(Pa_GetDefaultInputDevice);
LOAD_FUNC(Pa_GetStreamInfo);
#undef LOAD_FUNC
if((err=Pa_Initialize()) != paNoError)
{
ERR("Pa_Initialize() returned an error: %s\n", Pa_GetErrorText(err));
CloseLib(pa_handle);
pa_handle = NULL;
return ALC_FALSE;
}
}
#else
if((err=Pa_Initialize()) != paNoError)
{
ERR("Pa_Initialize() returned an error: %s\n", Pa_GetErrorText(err));
return ALC_FALSE;
}
#endif
return ALC_TRUE;
}
typedef struct ALCportPlayback {
DERIVE_FROM_TYPE(ALCbackend);
PaStream *stream;
PaStreamParameters params;
ALuint update_size;
} ALCportPlayback;
static int ALCportPlayback_WriteCallback(const void *inputBuffer, void *outputBuffer,
unsigned long framesPerBuffer, const PaStreamCallbackTimeInfo *timeInfo,
const PaStreamCallbackFlags statusFlags, void *userData);
static void ALCportPlayback_Construct(ALCportPlayback *self, ALCdevice *device);
static void ALCportPlayback_Destruct(ALCportPlayback *self);
static ALCenum ALCportPlayback_open(ALCportPlayback *self, const ALCchar *name);
static ALCboolean ALCportPlayback_reset(ALCportPlayback *self);
static ALCboolean ALCportPlayback_start(ALCportPlayback *self);
static void ALCportPlayback_stop(ALCportPlayback *self);
static DECLARE_FORWARD2(ALCportPlayback, ALCbackend, ALCenum, captureSamples, ALCvoid*, ALCuint)
static DECLARE_FORWARD(ALCportPlayback, ALCbackend, ALCuint, availableSamples)
static DECLARE_FORWARD(ALCportPlayback, ALCbackend, ClockLatency, getClockLatency)
static DECLARE_FORWARD(ALCportPlayback, ALCbackend, void, lock)
static DECLARE_FORWARD(ALCportPlayback, ALCbackend, void, unlock)
DECLARE_DEFAULT_ALLOCATORS(ALCportPlayback)
DEFINE_ALCBACKEND_VTABLE(ALCportPlayback);
static void ALCportPlayback_Construct(ALCportPlayback *self, ALCdevice *device)
{
ALCbackend_Construct(STATIC_CAST(ALCbackend, self), device);
SET_VTABLE2(ALCportPlayback, ALCbackend, self);
self->stream = NULL;
}
static void ALCportPlayback_Destruct(ALCportPlayback *self)
{
PaError err = self->stream ? Pa_CloseStream(self->stream) : paNoError;
if(err != paNoError)
ERR("Error closing stream: %s\n", Pa_GetErrorText(err));
self->stream = NULL;
ALCbackend_Destruct(STATIC_CAST(ALCbackend, self));
}
static int ALCportPlayback_WriteCallback(const void *UNUSED(inputBuffer), void *outputBuffer,
unsigned long framesPerBuffer, const PaStreamCallbackTimeInfo *UNUSED(timeInfo),
const PaStreamCallbackFlags UNUSED(statusFlags), void *userData)
{
ALCportPlayback *self = userData;
ALCportPlayback_lock(self);
aluMixData(STATIC_CAST(ALCbackend, self)->mDevice, outputBuffer, framesPerBuffer);
ALCportPlayback_unlock(self);
return 0;
}
static ALCenum ALCportPlayback_open(ALCportPlayback *self, const ALCchar *name)
{
ALCdevice *device = STATIC_CAST(ALCbackend, self)->mDevice;
PaError err;
if(!name)
name = pa_device;
else if(strcmp(name, pa_device) != 0)
return ALC_INVALID_VALUE;
self->update_size = device->UpdateSize;
self->params.device = -1;
if(!ConfigValueInt(NULL, "port", "device", &self->params.device) ||
self->params.device < 0)
self->params.device = Pa_GetDefaultOutputDevice();
self->params.suggestedLatency = (device->UpdateSize*device->NumUpdates) /
(float)device->Frequency;
self->params.hostApiSpecificStreamInfo = NULL;
self->params.channelCount = ((device->FmtChans == DevFmtMono) ? 1 : 2);
switch(device->FmtType)
{
case DevFmtByte:
self->params.sampleFormat = paInt8;
break;
case DevFmtUByte:
self->params.sampleFormat = paUInt8;
break;
case DevFmtUShort:
/* fall-through */
case DevFmtShort:
self->params.sampleFormat = paInt16;
break;
case DevFmtUInt:
/* fall-through */
case DevFmtInt:
self->params.sampleFormat = paInt32;
break;
case DevFmtFloat:
self->params.sampleFormat = paFloat32;
break;
}
retry_open:
err = Pa_OpenStream(&self->stream, NULL, &self->params,
device->Frequency, device->UpdateSize, paNoFlag,
ALCportPlayback_WriteCallback, self
);
if(err != paNoError)
{
if(self->params.sampleFormat == paFloat32)
{
self->params.sampleFormat = paInt16;
goto retry_open;
}
ERR("Pa_OpenStream() returned an error: %s\n", Pa_GetErrorText(err));
return ALC_INVALID_VALUE;
}
alstr_copy_cstr(&device->DeviceName, name);
return ALC_NO_ERROR;
}
static ALCboolean ALCportPlayback_reset(ALCportPlayback *self)
{
ALCdevice *device = STATIC_CAST(ALCbackend, self)->mDevice;
const PaStreamInfo *streamInfo;
streamInfo = Pa_GetStreamInfo(self->stream);
device->Frequency = streamInfo->sampleRate;
device->UpdateSize = self->update_size;
if(self->params.sampleFormat == paInt8)
device->FmtType = DevFmtByte;
else if(self->params.sampleFormat == paUInt8)
device->FmtType = DevFmtUByte;
else if(self->params.sampleFormat == paInt16)
device->FmtType = DevFmtShort;
else if(self->params.sampleFormat == paInt32)
device->FmtType = DevFmtInt;
else if(self->params.sampleFormat == paFloat32)
device->FmtType = DevFmtFloat;
else
{
ERR("Unexpected sample format: 0x%lx\n", self->params.sampleFormat);
return ALC_FALSE;
}
if(self->params.channelCount == 2)
device->FmtChans = DevFmtStereo;
else if(self->params.channelCount == 1)
device->FmtChans = DevFmtMono;
else
{
ERR("Unexpected channel count: %u\n", self->params.channelCount);
return ALC_FALSE;
}
SetDefaultChannelOrder(device);
return ALC_TRUE;
}
static ALCboolean ALCportPlayback_start(ALCportPlayback *self)
{
PaError err;
err = Pa_StartStream(self->stream);
if(err != paNoError)
{
ERR("Pa_StartStream() returned an error: %s\n", Pa_GetErrorText(err));
return ALC_FALSE;
}
return ALC_TRUE;
}
static void ALCportPlayback_stop(ALCportPlayback *self)
{
PaError err = Pa_StopStream(self->stream);
if(err != paNoError)
ERR("Error stopping stream: %s\n", Pa_GetErrorText(err));
}
typedef struct ALCportCapture {
DERIVE_FROM_TYPE(ALCbackend);
PaStream *stream;
PaStreamParameters params;
ll_ringbuffer_t *ring;
} ALCportCapture;
static int ALCportCapture_ReadCallback(const void *inputBuffer, void *outputBuffer,
unsigned long framesPerBuffer, const PaStreamCallbackTimeInfo *timeInfo,
const PaStreamCallbackFlags statusFlags, void *userData);
static void ALCportCapture_Construct(ALCportCapture *self, ALCdevice *device);
static void ALCportCapture_Destruct(ALCportCapture *self);
static ALCenum ALCportCapture_open(ALCportCapture *self, const ALCchar *name);
static DECLARE_FORWARD(ALCportCapture, ALCbackend, ALCboolean, reset)
static ALCboolean ALCportCapture_start(ALCportCapture *self);
static void ALCportCapture_stop(ALCportCapture *self);
static ALCenum ALCportCapture_captureSamples(ALCportCapture *self, ALCvoid *buffer, ALCuint samples);
static ALCuint ALCportCapture_availableSamples(ALCportCapture *self);
static DECLARE_FORWARD(ALCportCapture, ALCbackend, ClockLatency, getClockLatency)
static DECLARE_FORWARD(ALCportCapture, ALCbackend, void, lock)
static DECLARE_FORWARD(ALCportCapture, ALCbackend, void, unlock)
DECLARE_DEFAULT_ALLOCATORS(ALCportCapture)
DEFINE_ALCBACKEND_VTABLE(ALCportCapture);
static void ALCportCapture_Construct(ALCportCapture *self, ALCdevice *device)
{
ALCbackend_Construct(STATIC_CAST(ALCbackend, self), device);
SET_VTABLE2(ALCportCapture, ALCbackend, self);
self->stream = NULL;
self->ring = NULL;
}
static void ALCportCapture_Destruct(ALCportCapture *self)
{
PaError err = self->stream ? Pa_CloseStream(self->stream) : paNoError;
if(err != paNoError)
ERR("Error closing stream: %s\n", Pa_GetErrorText(err));
self->stream = NULL;
ll_ringbuffer_free(self->ring);
self->ring = NULL;
ALCbackend_Destruct(STATIC_CAST(ALCbackend, self));
}
static int ALCportCapture_ReadCallback(const void *inputBuffer, void *UNUSED(outputBuffer),
unsigned long framesPerBuffer, const PaStreamCallbackTimeInfo *UNUSED(timeInfo),
const PaStreamCallbackFlags UNUSED(statusFlags), void *userData)
{
ALCportCapture *self = userData;
size_t writable = ll_ringbuffer_write_space(self->ring);
if(framesPerBuffer > writable)
framesPerBuffer = writable;
ll_ringbuffer_write(self->ring, inputBuffer, framesPerBuffer);
return 0;
}
static ALCenum ALCportCapture_open(ALCportCapture *self, const ALCchar *name)
{
ALCdevice *device = STATIC_CAST(ALCbackend, self)->mDevice;
ALuint samples, frame_size;
PaError err;
if(!name)
name = pa_device;
else if(strcmp(name, pa_device) != 0)
return ALC_INVALID_VALUE;
samples = device->UpdateSize * device->NumUpdates;
samples = maxu(samples, 100 * device->Frequency / 1000);
frame_size = FrameSizeFromDevFmt(device->FmtChans, device->FmtType, device->AmbiOrder);
self->ring = ll_ringbuffer_create(samples, frame_size, false);
if(self->ring == NULL) return ALC_INVALID_VALUE;
self->params.device = -1;
if(!ConfigValueInt(NULL, "port", "capture", &self->params.device) ||
self->params.device < 0)
self->params.device = Pa_GetDefaultInputDevice();
self->params.suggestedLatency = 0.0f;
self->params.hostApiSpecificStreamInfo = NULL;
switch(device->FmtType)
{
case DevFmtByte:
self->params.sampleFormat = paInt8;
break;
case DevFmtUByte:
self->params.sampleFormat = paUInt8;
break;
case DevFmtShort:
self->params.sampleFormat = paInt16;
break;
case DevFmtInt:
self->params.sampleFormat = paInt32;
break;
case DevFmtFloat:
self->params.sampleFormat = paFloat32;
break;
case DevFmtUInt:
case DevFmtUShort:
ERR("%s samples not supported\n", DevFmtTypeString(device->FmtType));
return ALC_INVALID_VALUE;
}
self->params.channelCount = ChannelsFromDevFmt(device->FmtChans, device->AmbiOrder);
err = Pa_OpenStream(&self->stream, &self->params, NULL,
device->Frequency, paFramesPerBufferUnspecified, paNoFlag,
ALCportCapture_ReadCallback, self
);
if(err != paNoError)
{
ERR("Pa_OpenStream() returned an error: %s\n", Pa_GetErrorText(err));
return ALC_INVALID_VALUE;
}
alstr_copy_cstr(&device->DeviceName, name);
return ALC_NO_ERROR;
}
static ALCboolean ALCportCapture_start(ALCportCapture *self)
{
PaError err = Pa_StartStream(self->stream);
if(err != paNoError)
{
ERR("Error starting stream: %s\n", Pa_GetErrorText(err));
return ALC_FALSE;
}
return ALC_TRUE;
}
static void ALCportCapture_stop(ALCportCapture *self)
{
PaError err = Pa_StopStream(self->stream);
if(err != paNoError)
ERR("Error stopping stream: %s\n", Pa_GetErrorText(err));
}
static ALCuint ALCportCapture_availableSamples(ALCportCapture *self)
{
return ll_ringbuffer_read_space(self->ring);
}
static ALCenum ALCportCapture_captureSamples(ALCportCapture *self, ALCvoid *buffer, ALCuint samples)
{
ll_ringbuffer_read(self->ring, buffer, samples);
return ALC_NO_ERROR;
}
typedef struct ALCportBackendFactory {
DERIVE_FROM_TYPE(ALCbackendFactory);
} ALCportBackendFactory;
#define ALCPORTBACKENDFACTORY_INITIALIZER { { GET_VTABLE2(ALCportBackendFactory, ALCbackendFactory) } }
static ALCboolean ALCportBackendFactory_init(ALCportBackendFactory *self);
static void ALCportBackendFactory_deinit(ALCportBackendFactory *self);
static ALCboolean ALCportBackendFactory_querySupport(ALCportBackendFactory *self, ALCbackend_Type type);
static void ALCportBackendFactory_probe(ALCportBackendFactory *self, enum DevProbe type, al_string *outnames);
static ALCbackend* ALCportBackendFactory_createBackend(ALCportBackendFactory *self, ALCdevice *device, ALCbackend_Type type);
DEFINE_ALCBACKENDFACTORY_VTABLE(ALCportBackendFactory);
static ALCboolean ALCportBackendFactory_init(ALCportBackendFactory* UNUSED(self))
{
if(!pa_load())
return ALC_FALSE;
return ALC_TRUE;
}
static void ALCportBackendFactory_deinit(ALCportBackendFactory* UNUSED(self))
{
#ifdef HAVE_DYNLOAD
if(pa_handle)
{
Pa_Terminate();
CloseLib(pa_handle);
pa_handle = NULL;
}
#else
Pa_Terminate();
#endif
}
static ALCboolean ALCportBackendFactory_querySupport(ALCportBackendFactory* UNUSED(self), ALCbackend_Type type)
{
if(type == ALCbackend_Playback || type == ALCbackend_Capture)
return ALC_TRUE;
return ALC_FALSE;
}
static void ALCportBackendFactory_probe(ALCportBackendFactory* UNUSED(self), enum DevProbe type, al_string *outnames)
{
switch(type)
{
case ALL_DEVICE_PROBE:
case CAPTURE_DEVICE_PROBE:
alstr_append_range(outnames, pa_device, pa_device+sizeof(pa_device));
break;
}
}
static ALCbackend* ALCportBackendFactory_createBackend(ALCportBackendFactory* UNUSED(self), ALCdevice *device, ALCbackend_Type type)
{
if(type == ALCbackend_Playback)
{
ALCportPlayback *backend;
NEW_OBJ(backend, ALCportPlayback)(device);
if(!backend) return NULL;
return STATIC_CAST(ALCbackend, backend);
}
if(type == ALCbackend_Capture)
{
ALCportCapture *backend;
NEW_OBJ(backend, ALCportCapture)(device);
if(!backend) return NULL;
return STATIC_CAST(ALCbackend, backend);
}
return NULL;
}
ALCbackendFactory *ALCportBackendFactory_getFactory(void)
{
static ALCportBackendFactory factory = ALCPORTBACKENDFACTORY_INITIALIZER;
return STATIC_CAST(ALCbackendFactory, &factory);
}
|