|
1 /**************************************************************************** |
|
2 ** |
|
3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). |
|
4 ** All rights reserved. |
|
5 ** Contact: Nokia Corporation (qt-info@nokia.com) |
|
6 ** |
|
7 ** This file is part of the QtMultimedia module of the Qt Toolkit. |
|
8 ** |
|
9 ** $QT_BEGIN_LICENSE:LGPL$ |
|
10 ** No Commercial Usage |
|
11 ** This file contains pre-release code and may not be distributed. |
|
12 ** You may use this file in accordance with the terms and conditions |
|
13 ** contained in the Technology Preview License Agreement accompanying |
|
14 ** this package. |
|
15 ** |
|
16 ** GNU Lesser General Public License Usage |
|
17 ** Alternatively, this file may be used under the terms of the GNU Lesser |
|
18 ** General Public License version 2.1 as published by the Free Software |
|
19 ** Foundation and appearing in the file LICENSE.LGPL included in the |
|
20 ** packaging of this file. Please review the following information to |
|
21 ** ensure the GNU Lesser General Public License version 2.1 requirements |
|
22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
|
23 ** |
|
24 ** In addition, as a special exception, Nokia gives you certain additional |
|
25 ** rights. These rights are described in the Nokia Qt LGPL Exception |
|
26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
|
27 ** |
|
28 ** If you have questions regarding the use of this file, please contact |
|
29 ** Nokia at qt-info@nokia.com. |
|
30 ** |
|
31 ** |
|
32 ** |
|
33 ** |
|
34 ** |
|
35 ** |
|
36 ** |
|
37 ** |
|
38 ** $QT_END_LICENSE$ |
|
39 ** |
|
40 ****************************************************************************/ |
|
41 |
|
42 // |
|
43 // W A R N I N G |
|
44 // ------------- |
|
45 // |
|
46 // This file is not part of the Qt API. It exists for the convenience |
|
47 // of other Qt classes. This header file may change from version to |
|
48 // version without notice, or even be removed. |
|
49 // |
|
50 // We mean it. |
|
51 // |
|
52 |
|
53 #include <QtCore/qcoreapplication.h> |
|
54 #include "qaudiooutput_alsa_p.h" |
|
55 |
|
56 QT_BEGIN_NAMESPACE |
|
57 |
|
58 //#define DEBUG_AUDIO 1 |
|
59 |
|
60 static const int minimumIntervalTime = 50; |
|
61 |
|
62 QAudioOutputPrivate::QAudioOutputPrivate(const QByteArray &device, const QAudioFormat& audioFormat): |
|
63 settings(audioFormat) |
|
64 { |
|
65 bytesAvailable = 0; |
|
66 handle = 0; |
|
67 ahandler = 0; |
|
68 access = SND_PCM_ACCESS_RW_INTERLEAVED; |
|
69 pcmformat = SND_PCM_FORMAT_S16; |
|
70 buffer_frames = 0; |
|
71 period_frames = 0; |
|
72 buffer_size = 0; |
|
73 period_size = 0; |
|
74 buffer_time = 100000; |
|
75 period_time = 20000; |
|
76 totalTimeValue = 0; |
|
77 intervalTime = 1000; |
|
78 audioBuffer = 0; |
|
79 errorState = QAudio::NoError; |
|
80 deviceState = QAudio::StopState; |
|
81 audioSource = 0; |
|
82 pullMode = true; |
|
83 resuming = false; |
|
84 opened = false; |
|
85 |
|
86 QStringList list1 = QString(QLatin1String(device)).split(QLatin1String(":")); |
|
87 m_device = QByteArray(list1.at(0).toLocal8Bit().constData()); |
|
88 |
|
89 timer = new QTimer(this); |
|
90 connect(timer,SIGNAL(timeout()),SLOT(userFeed())); |
|
91 } |
|
92 |
|
93 QAudioOutputPrivate::~QAudioOutputPrivate() |
|
94 { |
|
95 close(); |
|
96 disconnect(timer, SIGNAL(timeout())); |
|
97 QCoreApplication::processEvents(); |
|
98 delete timer; |
|
99 } |
|
100 |
|
101 QAudio::Error QAudioOutputPrivate::error() const |
|
102 { |
|
103 return errorState; |
|
104 } |
|
105 |
|
106 QAudio::State QAudioOutputPrivate::state() const |
|
107 { |
|
108 return deviceState; |
|
109 } |
|
110 |
|
111 void QAudioOutputPrivate::async_callback(snd_async_handler_t *ahandler) |
|
112 { |
|
113 QAudioOutputPrivate* audioOut; |
|
114 |
|
115 audioOut = static_cast<QAudioOutputPrivate*> |
|
116 (snd_async_handler_get_callback_private(ahandler)); |
|
117 |
|
118 if((audioOut->deviceState==QAudio::ActiveState)||(audioOut->resuming)) |
|
119 audioOut->feedback(); |
|
120 } |
|
121 |
|
122 int QAudioOutputPrivate::xrun_recovery(int err) |
|
123 { |
|
124 int count = 0; |
|
125 bool reset = false; |
|
126 |
|
127 if(err == -EPIPE) { |
|
128 errorState = QAudio::UnderrunError; |
|
129 err = snd_pcm_prepare(handle); |
|
130 if(err < 0) |
|
131 reset = true; |
|
132 |
|
133 } else if((err == -ESTRPIPE)||(err == -EIO)) { |
|
134 errorState = QAudio::IOError; |
|
135 while((err = snd_pcm_resume(handle)) == -EAGAIN){ |
|
136 usleep(100); |
|
137 count++; |
|
138 if(count > 5) { |
|
139 reset = true; |
|
140 break; |
|
141 } |
|
142 } |
|
143 if(err < 0) { |
|
144 err = snd_pcm_prepare(handle); |
|
145 if(err < 0) |
|
146 reset = true; |
|
147 } |
|
148 } |
|
149 if(reset) { |
|
150 close(); |
|
151 open(); |
|
152 snd_pcm_prepare(handle); |
|
153 return 0; |
|
154 } |
|
155 return err; |
|
156 } |
|
157 |
|
158 int QAudioOutputPrivate::setFormat() |
|
159 { |
|
160 snd_pcm_format_t pcmformat = SND_PCM_FORMAT_S16; |
|
161 |
|
162 if(settings.sampleSize() == 8) { |
|
163 pcmformat = SND_PCM_FORMAT_U8; |
|
164 |
|
165 } else if(settings.sampleSize() == 16) { |
|
166 if(settings.sampleType() == QAudioFormat::SignedInt) { |
|
167 if(settings.byteOrder() == QAudioFormat::LittleEndian) |
|
168 pcmformat = SND_PCM_FORMAT_S16_LE; |
|
169 else |
|
170 pcmformat = SND_PCM_FORMAT_S16_BE; |
|
171 } else if(settings.sampleType() == QAudioFormat::UnSignedInt) { |
|
172 if(settings.byteOrder() == QAudioFormat::LittleEndian) |
|
173 pcmformat = SND_PCM_FORMAT_U16_LE; |
|
174 else |
|
175 pcmformat = SND_PCM_FORMAT_U16_BE; |
|
176 } |
|
177 } else if(settings.sampleSize() == 24) { |
|
178 if(settings.sampleType() == QAudioFormat::SignedInt) { |
|
179 if(settings.byteOrder() == QAudioFormat::LittleEndian) |
|
180 pcmformat = SND_PCM_FORMAT_S24_LE; |
|
181 else |
|
182 pcmformat = SND_PCM_FORMAT_S24_BE; |
|
183 } else if(settings.sampleType() == QAudioFormat::UnSignedInt) { |
|
184 if(settings.byteOrder() == QAudioFormat::LittleEndian) |
|
185 pcmformat = SND_PCM_FORMAT_U24_LE; |
|
186 else |
|
187 pcmformat = SND_PCM_FORMAT_U24_BE; |
|
188 } |
|
189 } else if(settings.sampleSize() == 32) { |
|
190 if(settings.sampleType() == QAudioFormat::SignedInt) { |
|
191 if(settings.byteOrder() == QAudioFormat::LittleEndian) |
|
192 pcmformat = SND_PCM_FORMAT_S32_LE; |
|
193 else |
|
194 pcmformat = SND_PCM_FORMAT_S32_BE; |
|
195 } else if(settings.sampleType() == QAudioFormat::UnSignedInt) { |
|
196 if(settings.byteOrder() == QAudioFormat::LittleEndian) |
|
197 pcmformat = SND_PCM_FORMAT_U32_LE; |
|
198 else |
|
199 pcmformat = SND_PCM_FORMAT_U32_BE; |
|
200 } else if(settings.sampleType() == QAudioFormat::Float) { |
|
201 if(settings.byteOrder() == QAudioFormat::LittleEndian) |
|
202 pcmformat = SND_PCM_FORMAT_FLOAT_LE; |
|
203 else |
|
204 pcmformat = SND_PCM_FORMAT_FLOAT_BE; |
|
205 } |
|
206 } else if(settings.sampleSize() == 64) { |
|
207 if(settings.byteOrder() == QAudioFormat::LittleEndian) |
|
208 pcmformat = SND_PCM_FORMAT_FLOAT64_LE; |
|
209 else |
|
210 pcmformat = SND_PCM_FORMAT_FLOAT64_BE; |
|
211 } |
|
212 |
|
213 return snd_pcm_hw_params_set_format( handle, hwparams, pcmformat); |
|
214 } |
|
215 |
|
216 QIODevice* QAudioOutputPrivate::start(QIODevice* device) |
|
217 { |
|
218 if(deviceState != QAudio::StopState) |
|
219 deviceState = QAudio::StopState; |
|
220 |
|
221 errorState = QAudio::NoError; |
|
222 |
|
223 // Handle change of mode |
|
224 if(audioSource && pullMode && !device) { |
|
225 // pull -> push |
|
226 close(); |
|
227 audioSource = 0; |
|
228 } else if(audioSource && !pullMode && device) { |
|
229 // push -> pull |
|
230 close(); |
|
231 delete audioSource; |
|
232 audioSource = 0; |
|
233 } |
|
234 |
|
235 if(device) { |
|
236 //set to pull mode |
|
237 pullMode = true; |
|
238 audioSource = device; |
|
239 deviceState = QAudio::ActiveState; |
|
240 } else { |
|
241 //set to push mode |
|
242 if(!audioSource) { |
|
243 audioSource = new OutputPrivate(this); |
|
244 audioSource->open(QIODevice::WriteOnly|QIODevice::Unbuffered); |
|
245 } |
|
246 pullMode = false; |
|
247 deviceState = QAudio::IdleState; |
|
248 } |
|
249 |
|
250 open(); |
|
251 |
|
252 emit stateChanged(deviceState); |
|
253 |
|
254 return audioSource; |
|
255 } |
|
256 |
|
257 void QAudioOutputPrivate::stop() |
|
258 { |
|
259 if(deviceState == QAudio::StopState) |
|
260 return; |
|
261 deviceState = QAudio::StopState; |
|
262 close(); |
|
263 emit stateChanged(deviceState); |
|
264 } |
|
265 |
|
266 bool QAudioOutputPrivate::open() |
|
267 { |
|
268 if(opened) |
|
269 return true; |
|
270 |
|
271 #ifdef DEBUG_AUDIO |
|
272 QTime now(QTime::currentTime()); |
|
273 qDebug()<<now.second()<<"s "<<now.msec()<<"ms :open()"; |
|
274 #endif |
|
275 timeStamp.restart(); |
|
276 elapsedTimeOffset = 0; |
|
277 |
|
278 int dir; |
|
279 int err=-1; |
|
280 int count=0; |
|
281 unsigned int freakuency=settings.frequency(); |
|
282 |
|
283 QString dev = QLatin1String(m_device.constData()); |
|
284 if(!dev.contains(QLatin1String("default"))) { |
|
285 #if(SND_LIB_MAJOR == 1 && SND_LIB_MINOR == 0 && SND_LIB_SUBMINOR >= 14) |
|
286 dev = QString(QLatin1String("default:CARD=%1")).arg(QLatin1String(m_device.constData())); |
|
287 #else |
|
288 int idx = 0; |
|
289 char *name; |
|
290 |
|
291 while(snd_card_get_name(idx,&name) == 0) { |
|
292 if(m_device.contains(name)) |
|
293 break; |
|
294 idx++; |
|
295 } |
|
296 dev = QString(QLatin1String("hw:%1,0")).arg(idx); |
|
297 #endif |
|
298 } |
|
299 // Step 1: try and open the device |
|
300 while((count < 5) && (err < 0)) { |
|
301 err=snd_pcm_open(&handle,dev.toLocal8Bit().constData(),SND_PCM_STREAM_PLAYBACK,0); |
|
302 if(err < 0) |
|
303 count++; |
|
304 } |
|
305 if (( err < 0)||(handle == 0)) { |
|
306 errorState = QAudio::OpenError; |
|
307 deviceState = QAudio::StopState; |
|
308 return false; |
|
309 } |
|
310 snd_pcm_nonblock( handle, 0 ); |
|
311 |
|
312 // Step 2: Set the desired HW parameters. |
|
313 snd_pcm_hw_params_alloca( &hwparams ); |
|
314 |
|
315 bool fatal = false; |
|
316 QString errMessage; |
|
317 unsigned int chunks = 8; |
|
318 |
|
319 err = snd_pcm_hw_params_any( handle, hwparams ); |
|
320 if ( err < 0 ) { |
|
321 fatal = true; |
|
322 errMessage = QString::fromLatin1("QAudioOutput: snd_pcm_hw_params_any: err = %1").arg(err); |
|
323 } |
|
324 if ( !fatal ) { |
|
325 err = snd_pcm_hw_params_set_rate_resample( handle, hwparams, 1 ); |
|
326 if ( err < 0 ) { |
|
327 fatal = true; |
|
328 errMessage = QString::fromLatin1("QAudioOutput: snd_pcm_hw_params_set_rate_resample: err = %1").arg(err); |
|
329 } |
|
330 } |
|
331 if ( !fatal ) { |
|
332 err = snd_pcm_hw_params_set_access( handle, hwparams, access ); |
|
333 if ( err < 0 ) { |
|
334 fatal = true; |
|
335 errMessage = QString::fromLatin1("QAudioOutput: snd_pcm_hw_params_set_access: err = %1").arg(err); |
|
336 } |
|
337 } |
|
338 if ( !fatal ) { |
|
339 err = setFormat(); |
|
340 if ( err < 0 ) { |
|
341 fatal = true; |
|
342 errMessage = QString::fromLatin1("QAudioOutput: snd_pcm_hw_params_set_format: err = %1").arg(err); |
|
343 } |
|
344 } |
|
345 if ( !fatal ) { |
|
346 err = snd_pcm_hw_params_set_channels( handle, hwparams, (unsigned int)settings.channels() ); |
|
347 if ( err < 0 ) { |
|
348 fatal = true; |
|
349 errMessage = QString::fromLatin1("QAudioOutput: snd_pcm_hw_params_set_channels: err = %1").arg(err); |
|
350 } |
|
351 } |
|
352 if ( !fatal ) { |
|
353 err = snd_pcm_hw_params_set_rate_near( handle, hwparams, &freakuency, 0 ); |
|
354 if ( err < 0 ) { |
|
355 fatal = true; |
|
356 errMessage = QString::fromLatin1("QAudioOutput: snd_pcm_hw_params_set_rate_near: err = %1").arg(err); |
|
357 } |
|
358 } |
|
359 if ( !fatal ) { |
|
360 err = snd_pcm_hw_params_set_buffer_time_near(handle, hwparams, &buffer_time, &dir); |
|
361 if ( err < 0 ) { |
|
362 fatal = true; |
|
363 errMessage = QString::fromLatin1("QAudioOutput: snd_pcm_hw_params_set_buffer_time_near: err = %1").arg(err); |
|
364 } |
|
365 } |
|
366 if ( !fatal ) { |
|
367 err = snd_pcm_hw_params_set_period_time_near(handle, hwparams, &period_time, &dir); |
|
368 if ( err < 0 ) { |
|
369 fatal = true; |
|
370 errMessage = QString::fromLatin1("QAudioOutput: snd_pcm_hw_params_set_period_time_near: err = %1").arg(err); |
|
371 } |
|
372 } |
|
373 if ( !fatal ) { |
|
374 err = snd_pcm_hw_params_set_periods_near(handle, hwparams, &chunks, &dir); |
|
375 if ( err < 0 ) { |
|
376 fatal = true; |
|
377 errMessage = QString::fromLatin1("QAudioOutput: snd_pcm_hw_params_set_periods_near: err = %1").arg(err); |
|
378 } |
|
379 } |
|
380 if ( !fatal ) { |
|
381 err = snd_pcm_hw_params(handle, hwparams); |
|
382 if ( err < 0 ) { |
|
383 fatal = true; |
|
384 errMessage = QString::fromLatin1("QAudioOutput: snd_pcm_hw_params: err = %1").arg(err); |
|
385 } |
|
386 } |
|
387 if( err < 0) { |
|
388 qWarning()<<errMessage; |
|
389 errorState = QAudio::OpenError; |
|
390 deviceState = QAudio::StopState; |
|
391 return false; |
|
392 } |
|
393 snd_pcm_hw_params_get_buffer_size(hwparams,&buffer_frames); |
|
394 buffer_size = snd_pcm_frames_to_bytes(handle,buffer_frames); |
|
395 snd_pcm_hw_params_get_period_size(hwparams,&period_frames, &dir); |
|
396 period_size = snd_pcm_frames_to_bytes(handle,period_frames); |
|
397 snd_pcm_hw_params_get_buffer_time(hwparams,&buffer_time, &dir); |
|
398 snd_pcm_hw_params_get_period_time(hwparams,&period_time, &dir); |
|
399 |
|
400 // Step 3: Set the desired SW parameters. |
|
401 snd_pcm_sw_params_t *swparams; |
|
402 snd_pcm_sw_params_alloca(&swparams); |
|
403 snd_pcm_sw_params_current(handle, swparams); |
|
404 snd_pcm_sw_params_set_start_threshold(handle,swparams,period_frames); |
|
405 snd_pcm_sw_params_set_stop_threshold(handle,swparams,buffer_frames); |
|
406 snd_pcm_sw_params_set_avail_min(handle, swparams,period_frames); |
|
407 snd_pcm_sw_params(handle, swparams); |
|
408 |
|
409 // Step 4: Prepare audio |
|
410 if(audioBuffer == 0) |
|
411 audioBuffer = new char[snd_pcm_frames_to_bytes(handle,buffer_frames)]; |
|
412 snd_pcm_prepare( handle ); |
|
413 snd_pcm_start(handle); |
|
414 |
|
415 // Step 5: Setup callback and timer fallback |
|
416 snd_async_add_pcm_handler(&ahandler, handle, async_callback, this); |
|
417 bytesAvailable = bytesFree(); |
|
418 |
|
419 // Step 6: Start audio processing |
|
420 timer->start(period_time/1000); |
|
421 |
|
422 clockStamp.restart(); |
|
423 timeStamp.restart(); |
|
424 elapsedTimeOffset = 0; |
|
425 errorState = QAudio::NoError; |
|
426 totalTimeValue = 0; |
|
427 opened = true; |
|
428 |
|
429 return true; |
|
430 } |
|
431 |
|
432 void QAudioOutputPrivate::close() |
|
433 { |
|
434 deviceState = QAudio::StopState; |
|
435 timer->stop(); |
|
436 |
|
437 if ( handle ) { |
|
438 snd_pcm_drain( handle ); |
|
439 snd_pcm_close( handle ); |
|
440 handle = 0; |
|
441 delete [] audioBuffer; |
|
442 audioBuffer=0; |
|
443 } |
|
444 if(!pullMode && audioSource) { |
|
445 delete audioSource; |
|
446 audioSource = 0; |
|
447 } |
|
448 opened = false; |
|
449 } |
|
450 |
|
451 int QAudioOutputPrivate::bytesFree() const |
|
452 { |
|
453 if(resuming) |
|
454 return period_size; |
|
455 |
|
456 if(deviceState != QAudio::ActiveState && deviceState != QAudio::IdleState) |
|
457 return 0; |
|
458 int frames = snd_pcm_avail_update(handle); |
|
459 if((int)frames > (int)buffer_frames) |
|
460 frames = buffer_frames; |
|
461 |
|
462 return snd_pcm_frames_to_bytes(handle, frames); |
|
463 } |
|
464 |
|
465 qint64 QAudioOutputPrivate::write( const char *data, qint64 len ) |
|
466 { |
|
467 // Write out some audio data |
|
468 if ( !handle ) |
|
469 return 0; |
|
470 #ifdef DEBUG_AUDIO |
|
471 qDebug()<<"frames to write out = "<< |
|
472 snd_pcm_bytes_to_frames( handle, (int)len )<<" ("<<len<<") bytes"; |
|
473 #endif |
|
474 int frames, err; |
|
475 int space = bytesFree(); |
|
476 if(len < space) { |
|
477 // Just write it |
|
478 frames = snd_pcm_bytes_to_frames( handle, (int)len ); |
|
479 err = snd_pcm_writei( handle, data, frames ); |
|
480 } else { |
|
481 // Only write space worth |
|
482 frames = snd_pcm_bytes_to_frames( handle, (int)space ); |
|
483 err = snd_pcm_writei( handle, data, frames ); |
|
484 } |
|
485 if(err > 0) { |
|
486 totalTimeValue += err*1000000/settings.frequency(); |
|
487 resuming = false; |
|
488 errorState = QAudio::NoError; |
|
489 deviceState = QAudio::ActiveState; |
|
490 return snd_pcm_frames_to_bytes( handle, err ); |
|
491 } else |
|
492 err = xrun_recovery(err); |
|
493 |
|
494 if(err < 0) { |
|
495 close(); |
|
496 errorState = QAudio::FatalError; |
|
497 deviceState = QAudio::StopState; |
|
498 emit stateChanged(deviceState); |
|
499 } |
|
500 return 0; |
|
501 } |
|
502 |
|
503 int QAudioOutputPrivate::periodSize() const |
|
504 { |
|
505 return period_size; |
|
506 } |
|
507 |
|
508 void QAudioOutputPrivate::setBufferSize(int value) |
|
509 { |
|
510 if(deviceState == QAudio::StopState) |
|
511 buffer_size = value; |
|
512 } |
|
513 |
|
514 int QAudioOutputPrivate::bufferSize() const |
|
515 { |
|
516 return buffer_size; |
|
517 } |
|
518 |
|
519 void QAudioOutputPrivate::setNotifyInterval(int ms) |
|
520 { |
|
521 if(ms >= minimumIntervalTime) |
|
522 intervalTime = ms; |
|
523 else |
|
524 intervalTime = minimumIntervalTime; |
|
525 } |
|
526 |
|
527 int QAudioOutputPrivate::notifyInterval() const |
|
528 { |
|
529 return intervalTime; |
|
530 } |
|
531 |
|
532 qint64 QAudioOutputPrivate::totalTime() const |
|
533 { |
|
534 return totalTimeValue; |
|
535 } |
|
536 |
|
537 void QAudioOutputPrivate::resume() |
|
538 { |
|
539 if(deviceState == QAudio::SuspendState) { |
|
540 int err = 0; |
|
541 |
|
542 if(handle) { |
|
543 err = snd_pcm_prepare( handle ); |
|
544 if(err < 0) |
|
545 xrun_recovery(err); |
|
546 |
|
547 err = snd_pcm_start(handle); |
|
548 if(err < 0) |
|
549 xrun_recovery(err); |
|
550 |
|
551 bytesAvailable = (int)snd_pcm_frames_to_bytes(handle, buffer_frames); |
|
552 } |
|
553 resuming = true; |
|
554 if(pullMode) |
|
555 deviceState = QAudio::ActiveState; |
|
556 else |
|
557 deviceState = QAudio::IdleState; |
|
558 |
|
559 errorState = QAudio::NoError; |
|
560 timer->start(period_time/1000); |
|
561 emit stateChanged(deviceState); |
|
562 } |
|
563 } |
|
564 |
|
565 QAudioFormat QAudioOutputPrivate::format() const |
|
566 { |
|
567 return settings; |
|
568 } |
|
569 |
|
570 void QAudioOutputPrivate::suspend() |
|
571 { |
|
572 if(deviceState == QAudio::ActiveState || deviceState == QAudio::IdleState || resuming) { |
|
573 timer->stop(); |
|
574 deviceState = QAudio::SuspendState; |
|
575 errorState = QAudio::NoError; |
|
576 emit stateChanged(deviceState); |
|
577 } |
|
578 } |
|
579 |
|
580 void QAudioOutputPrivate::userFeed() |
|
581 { |
|
582 if(deviceState == QAudio::StopState || deviceState == QAudio::SuspendState) |
|
583 return; |
|
584 #ifdef DEBUG_AUDIO |
|
585 QTime now(QTime::currentTime()); |
|
586 qDebug()<<now.second()<<"s "<<now.msec()<<"ms :userFeed() OUT"; |
|
587 #endif |
|
588 if(deviceState == QAudio::IdleState) |
|
589 bytesAvailable = bytesFree(); |
|
590 |
|
591 deviceReady(); |
|
592 } |
|
593 |
|
594 void QAudioOutputPrivate::feedback() |
|
595 { |
|
596 QMetaObject::invokeMethod(this, SLOT(updateAvailable()), Qt::QueuedConnection); |
|
597 } |
|
598 |
|
599 void QAudioOutputPrivate::updateAvailable() |
|
600 { |
|
601 #ifdef DEBUG_AUDIO |
|
602 QTime now(QTime::currentTime()); |
|
603 qDebug()<<now.second()<<"s "<<now.msec()<<"ms :updateAvailable()"; |
|
604 #endif |
|
605 bytesAvailable = bytesFree(); |
|
606 } |
|
607 |
|
608 bool QAudioOutputPrivate::deviceReady() |
|
609 { |
|
610 if(pullMode) { |
|
611 int l = 0; |
|
612 int chunks = bytesAvailable/period_size; |
|
613 if(chunks==0) { |
|
614 bytesAvailable = bytesFree(); |
|
615 return false; |
|
616 } |
|
617 #ifdef DEBUG_AUDIO |
|
618 qDebug()<<"deviceReady() avail="<<bytesAvailable<<" bytes, period size="<<period_size<<" bytes"; |
|
619 qDebug()<<"deviceReady() no. of chunks that can fit ="<<chunks<<", chunks in bytes ="<<period_size*chunks; |
|
620 #endif |
|
621 int input = period_frames*chunks; |
|
622 if(input > (int)buffer_frames) |
|
623 input = buffer_frames; |
|
624 l = audioSource->read(audioBuffer,snd_pcm_frames_to_bytes(handle, input)); |
|
625 if(l > 0) { |
|
626 // Got some data to output |
|
627 if(deviceState != QAudio::ActiveState) |
|
628 return true; |
|
629 write(audioBuffer,l); |
|
630 bytesAvailable = bytesFree(); |
|
631 |
|
632 } else if(l == 0) { |
|
633 // Did not get any data to output |
|
634 bytesAvailable = bytesFree(); |
|
635 if(bytesAvailable > snd_pcm_frames_to_bytes(handle, buffer_frames-period_frames)) { |
|
636 // Underrun |
|
637 errorState = QAudio::UnderrunError; |
|
638 deviceState = QAudio::IdleState; |
|
639 emit stateChanged(deviceState); |
|
640 } |
|
641 |
|
642 } else if(l < 0) { |
|
643 close(); |
|
644 errorState = QAudio::IOError; |
|
645 emit stateChanged(deviceState); |
|
646 } |
|
647 } else |
|
648 bytesAvailable = bytesFree(); |
|
649 |
|
650 if(deviceState != QAudio::ActiveState) |
|
651 return true; |
|
652 |
|
653 if((timeStamp.elapsed() + elapsedTimeOffset) > intervalTime) { |
|
654 emit notify(); |
|
655 elapsedTimeOffset = timeStamp.elapsed() + elapsedTimeOffset - intervalTime; |
|
656 timeStamp.restart(); |
|
657 } |
|
658 return true; |
|
659 } |
|
660 |
|
661 qint64 QAudioOutputPrivate::clock() const |
|
662 { |
|
663 if(!handle) |
|
664 return 0; |
|
665 |
|
666 if (deviceState == QAudio::StopState) |
|
667 return 0; |
|
668 |
|
669 #if(SND_LIB_MAJOR == 1 && SND_LIB_MINOR == 0 && SND_LIB_SUBMINOR >= 14) |
|
670 snd_pcm_status_t* status; |
|
671 snd_pcm_status_alloca(&status); |
|
672 |
|
673 snd_timestamp_t t1,t2; |
|
674 if( snd_pcm_status(handle, status) >= 0) { |
|
675 snd_pcm_status_get_tstamp(status,&t1); |
|
676 snd_pcm_status_get_trigger_tstamp(status,&t2); |
|
677 t1.tv_sec-=t2.tv_sec; |
|
678 |
|
679 signed long l = (signed long)t1.tv_usec - (signed long)t2.tv_usec; |
|
680 if(l < 0) { |
|
681 t1.tv_sec--; |
|
682 l = -l; |
|
683 l %= 1000000; |
|
684 } |
|
685 return ((t1.tv_sec * 1000000)+l); |
|
686 } else |
|
687 return 0; |
|
688 #else |
|
689 return clockStamp.elapsed()*1000; |
|
690 #endif |
|
691 return 0; |
|
692 } |
|
693 |
|
694 void QAudioOutputPrivate::reset() |
|
695 { |
|
696 if(handle) |
|
697 snd_pcm_reset(handle); |
|
698 |
|
699 stop(); |
|
700 } |
|
701 |
|
702 OutputPrivate::OutputPrivate(QAudioOutputPrivate* audio) |
|
703 { |
|
704 audioDevice = qobject_cast<QAudioOutputPrivate*>(audio); |
|
705 } |
|
706 |
|
707 OutputPrivate::~OutputPrivate() {} |
|
708 |
|
709 qint64 OutputPrivate::readData( char* data, qint64 len) |
|
710 { |
|
711 Q_UNUSED(data) |
|
712 Q_UNUSED(len) |
|
713 |
|
714 return 0; |
|
715 } |
|
716 |
|
717 qint64 OutputPrivate::writeData(const char* data, qint64 len) |
|
718 { |
|
719 int retry = 0; |
|
720 qint64 written = 0; |
|
721 if((audioDevice->deviceState == QAudio::ActiveState) |
|
722 ||(audioDevice->deviceState == QAudio::IdleState)) { |
|
723 while(written < len) { |
|
724 int chunk = audioDevice->write(data+written,(len-written)); |
|
725 if(chunk <= 0) |
|
726 retry++; |
|
727 written+=chunk; |
|
728 if(retry > 10) |
|
729 return written; |
|
730 } |
|
731 } |
|
732 return written; |
|
733 |
|
734 } |
|
735 |
|
736 QT_END_NAMESPACE |