1 /*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #define LOG_TAG "AAudioServiceStreamBase"
18 //#define LOG_NDEBUG 0
19 #include <utils/Log.h>
20
21 #include <iomanip>
22 #include <iostream>
23 #include <mutex>
24
25 #include <media/MediaMetricsItem.h>
26 #include <media/TypeConverter.h>
27 #include <mediautils/SchedulingPolicyService.h>
28
29 #include "binding/IAAudioService.h"
30 #include "binding/AAudioServiceMessage.h"
31 #include "core/AudioGlobal.h"
32 #include "utility/AudioClock.h"
33
34 #include "AAudioEndpointManager.h"
35 #include "AAudioService.h"
36 #include "AAudioServiceEndpoint.h"
37 #include "AAudioServiceStreamBase.h"
38 #include "TimestampScheduler.h"
39
40 using namespace android; // TODO just import names needed
41 using namespace aaudio; // TODO just import names needed
42
43 /**
44 * Base class for streams in the service.
45 * @return
46 */
47
AAudioServiceStreamBase(AAudioService & audioService)48 AAudioServiceStreamBase::AAudioServiceStreamBase(AAudioService &audioService)
49 : mUpMessageQueue(nullptr)
50 , mTimestampThread("AATime")
51 , mAtomicStreamTimestamp()
52 , mAudioService(audioService) {
53 mMmapClient.clientUid = -1;
54 mMmapClient.clientPid = -1;
55 mMmapClient.packageName = String16("");
56 }
57
~AAudioServiceStreamBase()58 AAudioServiceStreamBase::~AAudioServiceStreamBase() {
59 // May not be set if open failed.
60 if (mMetricsId.size() > 0) {
61 mediametrics::LogItem(mMetricsId)
62 .set(AMEDIAMETRICS_PROP_EVENT, AMEDIAMETRICS_PROP_EVENT_VALUE_DTOR)
63 .set(AMEDIAMETRICS_PROP_STATE, AudioGlobal_convertStreamStateToText(getState()))
64 .record();
65 }
66
67 // If the stream is deleted when OPEN or in use then audio resources will leak.
68 // This would indicate an internal error. So we want to find this ASAP.
69 LOG_ALWAYS_FATAL_IF(!(getState() == AAUDIO_STREAM_STATE_CLOSED
70 || getState() == AAUDIO_STREAM_STATE_UNINITIALIZED
71 || getState() == AAUDIO_STREAM_STATE_DISCONNECTED),
72 "service stream %p still open, state = %d",
73 this, getState());
74 }
75
dumpHeader()76 std::string AAudioServiceStreamBase::dumpHeader() {
77 return std::string(" T Handle UId Port Run State Format Burst Chan Capacity");
78 }
79
dump() const80 std::string AAudioServiceStreamBase::dump() const {
81 std::stringstream result;
82
83 result << " 0x" << std::setfill('0') << std::setw(8) << std::hex << mHandle
84 << std::dec << std::setfill(' ') ;
85 result << std::setw(6) << mMmapClient.clientUid;
86 result << std::setw(7) << mClientHandle;
87 result << std::setw(4) << (isRunning() ? "yes" : " no");
88 result << std::setw(6) << getState();
89 result << std::setw(7) << getFormat();
90 result << std::setw(6) << mFramesPerBurst;
91 result << std::setw(5) << getSamplesPerFrame();
92 result << std::setw(9) << getBufferCapacity();
93
94 return result.str();
95 }
96
logOpen(aaudio_handle_t streamHandle)97 void AAudioServiceStreamBase::logOpen(aaudio_handle_t streamHandle) {
98 // This is the first log sent from the AAudio Service for a stream.
99 mMetricsId = std::string(AMEDIAMETRICS_KEY_PREFIX_AUDIO_STREAM)
100 + std::to_string(streamHandle);
101
102 audio_attributes_t attributes = AAudioServiceEndpoint::getAudioAttributesFrom(this);
103
104 // Once this item is logged by the server, the client with the same PID, UID
105 // can also log properties.
106 mediametrics::LogItem(mMetricsId)
107 .setPid(getOwnerProcessId())
108 .setUid(getOwnerUserId())
109 .set(AMEDIAMETRICS_PROP_ALLOWUID, (int32_t)getOwnerUserId())
110 .set(AMEDIAMETRICS_PROP_EVENT, AMEDIAMETRICS_PROP_EVENT_VALUE_OPEN)
111 // the following are immutable
112 .set(AMEDIAMETRICS_PROP_BUFFERCAPACITYFRAMES, (int32_t)getBufferCapacity())
113 .set(AMEDIAMETRICS_PROP_BURSTFRAMES, (int32_t)getFramesPerBurst())
114 .set(AMEDIAMETRICS_PROP_CHANNELCOUNT, (int32_t)getSamplesPerFrame())
115 .set(AMEDIAMETRICS_PROP_CONTENTTYPE, toString(attributes.content_type).c_str())
116 .set(AMEDIAMETRICS_PROP_DIRECTION,
117 AudioGlobal_convertDirectionToText(getDirection()))
118 .set(AMEDIAMETRICS_PROP_ENCODING, toString(getFormat()).c_str())
119 .set(AMEDIAMETRICS_PROP_ROUTEDDEVICEID, (int32_t)getDeviceId())
120 .set(AMEDIAMETRICS_PROP_SAMPLERATE, (int32_t)getSampleRate())
121 .set(AMEDIAMETRICS_PROP_SESSIONID, (int32_t)getSessionId())
122 .set(AMEDIAMETRICS_PROP_SOURCE, toString(attributes.source).c_str())
123 .set(AMEDIAMETRICS_PROP_USAGE, toString(attributes.usage).c_str())
124 .record();
125 }
126
open(const aaudio::AAudioStreamRequest & request)127 aaudio_result_t AAudioServiceStreamBase::open(const aaudio::AAudioStreamRequest &request) {
128 AAudioEndpointManager &mEndpointManager = AAudioEndpointManager::getInstance();
129 aaudio_result_t result = AAUDIO_OK;
130
131 mMmapClient.clientUid = request.getUserId();
132 mMmapClient.clientPid = request.getProcessId();
133 mMmapClient.packageName.setTo(String16("")); // TODO What should we do here?
134
135 // Limit scope of lock to avoid recursive lock in close().
136 {
137 std::lock_guard<std::mutex> lock(mUpMessageQueueLock);
138 if (mUpMessageQueue != nullptr) {
139 ALOGE("%s() called twice", __func__);
140 return AAUDIO_ERROR_INVALID_STATE;
141 }
142
143 mUpMessageQueue = new SharedRingBuffer();
144 result = mUpMessageQueue->allocate(sizeof(AAudioServiceMessage),
145 QUEUE_UP_CAPACITY_COMMANDS);
146 if (result != AAUDIO_OK) {
147 goto error;
148 }
149
150 // This is not protected by a lock because the stream cannot be
151 // referenced until the service returns a handle to the client.
152 // So only one thread can open a stream.
153 mServiceEndpoint = mEndpointManager.openEndpoint(mAudioService,
154 request);
155 if (mServiceEndpoint == nullptr) {
156 result = AAUDIO_ERROR_UNAVAILABLE;
157 goto error;
158 }
159 // Save a weak pointer that we will use to access the endpoint.
160 mServiceEndpointWeak = mServiceEndpoint;
161
162 mFramesPerBurst = mServiceEndpoint->getFramesPerBurst();
163 copyFrom(*mServiceEndpoint);
164 }
165 return result;
166
167 error:
168 close();
169 return result;
170 }
171
close()172 aaudio_result_t AAudioServiceStreamBase::close() {
173 std::lock_guard<std::mutex> lock(mLock);
174 return close_l();
175 }
176
close_l()177 aaudio_result_t AAudioServiceStreamBase::close_l() {
178 if (getState() == AAUDIO_STREAM_STATE_CLOSED) {
179 return AAUDIO_OK;
180 }
181
182 stop_l();
183
184 aaudio_result_t result = AAUDIO_OK;
185 sp<AAudioServiceEndpoint> endpoint = mServiceEndpointWeak.promote();
186 if (endpoint == nullptr) {
187 result = AAUDIO_ERROR_INVALID_STATE;
188 } else {
189 endpoint->unregisterStream(this);
190 AAudioEndpointManager &endpointManager = AAudioEndpointManager::getInstance();
191 endpointManager.closeEndpoint(endpoint);
192
193 // AAudioService::closeStream() prevents two threads from closing at the same time.
194 mServiceEndpoint.clear(); // endpoint will hold the pointer after this method returns.
195 }
196
197 {
198 std::lock_guard<std::mutex> lock(mUpMessageQueueLock);
199 stopTimestampThread();
200 delete mUpMessageQueue;
201 mUpMessageQueue = nullptr;
202 }
203
204 setState(AAUDIO_STREAM_STATE_CLOSED);
205
206 mediametrics::LogItem(mMetricsId)
207 .set(AMEDIAMETRICS_PROP_EVENT, AMEDIAMETRICS_PROP_EVENT_VALUE_CLOSE)
208 .record();
209 return result;
210 }
211
startDevice()212 aaudio_result_t AAudioServiceStreamBase::startDevice() {
213 mClientHandle = AUDIO_PORT_HANDLE_NONE;
214 sp<AAudioServiceEndpoint> endpoint = mServiceEndpointWeak.promote();
215 if (endpoint == nullptr) {
216 ALOGE("%s() has no endpoint", __func__);
217 return AAUDIO_ERROR_INVALID_STATE;
218 }
219 return endpoint->startStream(this, &mClientHandle);
220 }
221
222 /**
223 * Start the flow of audio data.
224 *
225 * An AAUDIO_SERVICE_EVENT_STARTED will be sent to the client when complete.
226 */
start()227 aaudio_result_t AAudioServiceStreamBase::start() {
228 std::lock_guard<std::mutex> lock(mLock);
229
230 const int64_t beginNs = AudioClock::getNanoseconds();
231 aaudio_result_t result = AAUDIO_OK;
232
233 if (auto state = getState();
234 state == AAUDIO_STREAM_STATE_CLOSED || state == AAUDIO_STREAM_STATE_DISCONNECTED) {
235 ALOGW("%s() already CLOSED, returns INVALID_STATE, handle = %d",
236 __func__, getHandle());
237 return AAUDIO_ERROR_INVALID_STATE;
238 }
239
240 mediametrics::Defer defer([&] {
241 mediametrics::LogItem(mMetricsId)
242 .set(AMEDIAMETRICS_PROP_EVENT, AMEDIAMETRICS_PROP_EVENT_VALUE_START)
243 .set(AMEDIAMETRICS_PROP_EXECUTIONTIMENS, (int64_t)(AudioClock::getNanoseconds() - beginNs))
244 .set(AMEDIAMETRICS_PROP_STATE, AudioGlobal_convertStreamStateToText(getState()))
245 .set(AMEDIAMETRICS_PROP_STATUS, (int32_t)result)
246 .record(); });
247
248 if (isRunning()) {
249 return result;
250 }
251
252 setFlowing(false);
253 setSuspended(false);
254
255 // Start with fresh presentation timestamps.
256 mAtomicStreamTimestamp.clear();
257
258 mClientHandle = AUDIO_PORT_HANDLE_NONE;
259 result = startDevice();
260 if (result != AAUDIO_OK) goto error;
261
262 // This should happen at the end of the start.
263 sendServiceEvent(AAUDIO_SERVICE_EVENT_STARTED);
264 setState(AAUDIO_STREAM_STATE_STARTED);
265 mThreadEnabled.store(true);
266 result = mTimestampThread.start(this);
267 if (result != AAUDIO_OK) goto error;
268
269 return result;
270
271 error:
272 disconnect_l();
273 return result;
274 }
275
pause()276 aaudio_result_t AAudioServiceStreamBase::pause() {
277 std::lock_guard<std::mutex> lock(mLock);
278 return pause_l();
279 }
280
pause_l()281 aaudio_result_t AAudioServiceStreamBase::pause_l() {
282 aaudio_result_t result = AAUDIO_OK;
283 if (!isRunning()) {
284 return result;
285 }
286 const int64_t beginNs = AudioClock::getNanoseconds();
287
288 mediametrics::Defer defer([&] {
289 mediametrics::LogItem(mMetricsId)
290 .set(AMEDIAMETRICS_PROP_EVENT, AMEDIAMETRICS_PROP_EVENT_VALUE_PAUSE)
291 .set(AMEDIAMETRICS_PROP_EXECUTIONTIMENS, (int64_t)(AudioClock::getNanoseconds() - beginNs))
292 .set(AMEDIAMETRICS_PROP_STATE, AudioGlobal_convertStreamStateToText(getState()))
293 .set(AMEDIAMETRICS_PROP_STATUS, (int32_t)result)
294 .record(); });
295
296 // Send it now because the timestamp gets rounded up when stopStream() is called below.
297 // Also we don't need the timestamps while we are shutting down.
298 sendCurrentTimestamp();
299
300 result = stopTimestampThread();
301 if (result != AAUDIO_OK) {
302 disconnect_l();
303 return result;
304 }
305
306 sp<AAudioServiceEndpoint> endpoint = mServiceEndpointWeak.promote();
307 if (endpoint == nullptr) {
308 ALOGE("%s() has no endpoint", __func__);
309 result = AAUDIO_ERROR_INVALID_STATE; // for MediaMetric tracking
310 return result;
311 }
312 result = endpoint->stopStream(this, mClientHandle);
313 if (result != AAUDIO_OK) {
314 ALOGE("%s() mServiceEndpoint returned %d, %s", __func__, result, getTypeText());
315 disconnect_l(); // TODO should we return or pause Base first?
316 }
317
318 sendServiceEvent(AAUDIO_SERVICE_EVENT_PAUSED);
319 setState(AAUDIO_STREAM_STATE_PAUSED);
320 return result;
321 }
322
stop()323 aaudio_result_t AAudioServiceStreamBase::stop() {
324 std::lock_guard<std::mutex> lock(mLock);
325 return stop_l();
326 }
327
stop_l()328 aaudio_result_t AAudioServiceStreamBase::stop_l() {
329 aaudio_result_t result = AAUDIO_OK;
330 if (!isRunning()) {
331 return result;
332 }
333 const int64_t beginNs = AudioClock::getNanoseconds();
334
335 mediametrics::Defer defer([&] {
336 mediametrics::LogItem(mMetricsId)
337 .set(AMEDIAMETRICS_PROP_EVENT, AMEDIAMETRICS_PROP_EVENT_VALUE_STOP)
338 .set(AMEDIAMETRICS_PROP_EXECUTIONTIMENS, (int64_t)(AudioClock::getNanoseconds() - beginNs))
339 .set(AMEDIAMETRICS_PROP_STATE, AudioGlobal_convertStreamStateToText(getState()))
340 .set(AMEDIAMETRICS_PROP_STATUS, (int32_t)result)
341 .record(); });
342
343 setState(AAUDIO_STREAM_STATE_STOPPING);
344
345 // Send it now because the timestamp gets rounded up when stopStream() is called below.
346 // Also we don't need the timestamps while we are shutting down.
347 sendCurrentTimestamp(); // warning - this calls a virtual function
348 result = stopTimestampThread();
349 if (result != AAUDIO_OK) {
350 disconnect_l();
351 return result;
352 }
353
354 sp<AAudioServiceEndpoint> endpoint = mServiceEndpointWeak.promote();
355 if (endpoint == nullptr) {
356 ALOGE("%s() has no endpoint", __func__);
357 result = AAUDIO_ERROR_INVALID_STATE; // for MediaMetric tracking
358 return result;
359 }
360 // TODO wait for data to be played out
361 result = endpoint->stopStream(this, mClientHandle);
362 if (result != AAUDIO_OK) {
363 ALOGE("%s() stopStream returned %d, %s", __func__, result, getTypeText());
364 disconnect_l();
365 // TODO what to do with result here?
366 }
367
368 sendServiceEvent(AAUDIO_SERVICE_EVENT_STOPPED);
369 setState(AAUDIO_STREAM_STATE_STOPPED);
370 return result;
371 }
372
stopTimestampThread()373 aaudio_result_t AAudioServiceStreamBase::stopTimestampThread() {
374 aaudio_result_t result = AAUDIO_OK;
375 // clear flag that tells thread to loop
376 if (mThreadEnabled.exchange(false)) {
377 result = mTimestampThread.stop();
378 }
379 return result;
380 }
381
flush()382 aaudio_result_t AAudioServiceStreamBase::flush() {
383 std::lock_guard<std::mutex> lock(mLock);
384 aaudio_result_t result = AAudio_isFlushAllowed(getState());
385 if (result != AAUDIO_OK) {
386 return result;
387 }
388 const int64_t beginNs = AudioClock::getNanoseconds();
389
390 mediametrics::Defer defer([&] {
391 mediametrics::LogItem(mMetricsId)
392 .set(AMEDIAMETRICS_PROP_EVENT, AMEDIAMETRICS_PROP_EVENT_VALUE_FLUSH)
393 .set(AMEDIAMETRICS_PROP_EXECUTIONTIMENS, (int64_t)(AudioClock::getNanoseconds() - beginNs))
394 .set(AMEDIAMETRICS_PROP_STATE, AudioGlobal_convertStreamStateToText(getState()))
395 .set(AMEDIAMETRICS_PROP_STATUS, (int32_t)result)
396 .record(); });
397
398 // Data will get flushed when the client receives the FLUSHED event.
399 sendServiceEvent(AAUDIO_SERVICE_EVENT_FLUSHED);
400 setState(AAUDIO_STREAM_STATE_FLUSHED);
401 return AAUDIO_OK;
402 }
403
404 // implement Runnable, periodically send timestamps to client
405 __attribute__((no_sanitize("integer")))
run()406 void AAudioServiceStreamBase::run() {
407 ALOGD("%s() %s entering >>>>>>>>>>>>>> TIMESTAMPS", __func__, getTypeText());
408 TimestampScheduler timestampScheduler;
409 timestampScheduler.setBurstPeriod(mFramesPerBurst, getSampleRate());
410 timestampScheduler.start(AudioClock::getNanoseconds());
411 int64_t nextTime = timestampScheduler.nextAbsoluteTime();
412 int32_t loopCount = 0;
413 while(mThreadEnabled.load()) {
414 loopCount++;
415 if (AudioClock::getNanoseconds() >= nextTime) {
416 aaudio_result_t result = sendCurrentTimestamp();
417 if (result != AAUDIO_OK) {
418 ALOGE("%s() timestamp thread got result = %d", __func__, result);
419 break;
420 }
421 nextTime = timestampScheduler.nextAbsoluteTime();
422 } else {
423 // Sleep until it is time to send the next timestamp.
424 // TODO Wait for a signal with a timeout so that we can stop more quickly.
425 AudioClock::sleepUntilNanoTime(nextTime);
426 }
427 }
428 ALOGD("%s() %s exiting after %d loops <<<<<<<<<<<<<< TIMESTAMPS",
429 __func__, getTypeText(), loopCount);
430 }
431
disconnect()432 void AAudioServiceStreamBase::disconnect() {
433 std::lock_guard<std::mutex> lock(mLock);
434 disconnect_l();
435 }
436
disconnect_l()437 void AAudioServiceStreamBase::disconnect_l() {
438 if (getState() != AAUDIO_STREAM_STATE_DISCONNECTED
439 && getState() != AAUDIO_STREAM_STATE_CLOSED) {
440
441 mediametrics::LogItem(mMetricsId)
442 .set(AMEDIAMETRICS_PROP_EVENT, AMEDIAMETRICS_PROP_EVENT_VALUE_DISCONNECT)
443 .set(AMEDIAMETRICS_PROP_STATE, AudioGlobal_convertStreamStateToText(getState()))
444 .record();
445
446 sendServiceEvent(AAUDIO_SERVICE_EVENT_DISCONNECTED);
447 setState(AAUDIO_STREAM_STATE_DISCONNECTED);
448 }
449 }
450
registerAudioThread(pid_t clientThreadId,int priority)451 aaudio_result_t AAudioServiceStreamBase::registerAudioThread(pid_t clientThreadId,
452 int priority) {
453 std::lock_guard<std::mutex> lock(mLock);
454 aaudio_result_t result = AAUDIO_OK;
455 if (getRegisteredThread() != AAudioServiceStreamBase::ILLEGAL_THREAD_ID) {
456 ALOGE("AAudioService::registerAudioThread(), thread already registered");
457 result = AAUDIO_ERROR_INVALID_STATE;
458 } else {
459 const pid_t ownerPid = IPCThreadState::self()->getCallingPid(); // TODO review
460 setRegisteredThread(clientThreadId);
461 int err = android::requestPriority(ownerPid, clientThreadId,
462 priority, true /* isForApp */);
463 if (err != 0) {
464 ALOGE("AAudioService::registerAudioThread(%d) failed, errno = %d, priority = %d",
465 clientThreadId, errno, priority);
466 result = AAUDIO_ERROR_INTERNAL;
467 }
468 }
469 return result;
470 }
471
unregisterAudioThread(pid_t clientThreadId)472 aaudio_result_t AAudioServiceStreamBase::unregisterAudioThread(pid_t clientThreadId) {
473 std::lock_guard<std::mutex> lock(mLock);
474 aaudio_result_t result = AAUDIO_OK;
475 if (getRegisteredThread() != clientThreadId) {
476 ALOGE("%s(), wrong thread", __func__);
477 result = AAUDIO_ERROR_ILLEGAL_ARGUMENT;
478 } else {
479 setRegisteredThread(0);
480 }
481 return result;
482 }
483
setState(aaudio_stream_state_t state)484 void AAudioServiceStreamBase::setState(aaudio_stream_state_t state) {
485 // CLOSED is a final state.
486 if (mState != AAUDIO_STREAM_STATE_CLOSED) {
487 mState = state;
488 } else {
489 ALOGW_IF(mState != state, "%s(%d) when already CLOSED", __func__, state);
490 }
491 }
492
sendServiceEvent(aaudio_service_event_t event,double dataDouble)493 aaudio_result_t AAudioServiceStreamBase::sendServiceEvent(aaudio_service_event_t event,
494 double dataDouble) {
495 AAudioServiceMessage command;
496 command.what = AAudioServiceMessage::code::EVENT;
497 command.event.event = event;
498 command.event.dataDouble = dataDouble;
499 return writeUpMessageQueue(&command);
500 }
501
sendServiceEvent(aaudio_service_event_t event,int64_t dataLong)502 aaudio_result_t AAudioServiceStreamBase::sendServiceEvent(aaudio_service_event_t event,
503 int64_t dataLong) {
504 AAudioServiceMessage command;
505 command.what = AAudioServiceMessage::code::EVENT;
506 command.event.event = event;
507 command.event.dataLong = dataLong;
508 return writeUpMessageQueue(&command);
509 }
510
isUpMessageQueueBusy()511 bool AAudioServiceStreamBase::isUpMessageQueueBusy() {
512 std::lock_guard<std::mutex> lock(mUpMessageQueueLock);
513 if (mUpMessageQueue == nullptr) {
514 ALOGE("%s(): mUpMessageQueue null! - stream not open", __func__);
515 return true;
516 }
517 int32_t framesAvailable = mUpMessageQueue->getFifoBuffer()
518 ->getFullFramesAvailable();
519 int32_t capacity = mUpMessageQueue->getFifoBuffer()
520 ->getBufferCapacityInFrames();
521 // Is it half full or more
522 return framesAvailable >= (capacity / 2);
523 }
524
writeUpMessageQueue(AAudioServiceMessage * command)525 aaudio_result_t AAudioServiceStreamBase::writeUpMessageQueue(AAudioServiceMessage *command) {
526 std::lock_guard<std::mutex> lock(mUpMessageQueueLock);
527 if (mUpMessageQueue == nullptr) {
528 ALOGE("%s(): mUpMessageQueue null! - stream not open", __func__);
529 return AAUDIO_ERROR_NULL;
530 }
531 int32_t count = mUpMessageQueue->getFifoBuffer()->write(command, 1);
532 if (count != 1) {
533 ALOGW("%s(): Queue full. Did client stop? Suspending stream. what = %u, %s",
534 __func__, command->what, getTypeText());
535 setSuspended(true);
536 return AAUDIO_ERROR_WOULD_BLOCK;
537 } else {
538 return AAUDIO_OK;
539 }
540 }
541
sendXRunCount(int32_t xRunCount)542 aaudio_result_t AAudioServiceStreamBase::sendXRunCount(int32_t xRunCount) {
543 return sendServiceEvent(AAUDIO_SERVICE_EVENT_XRUN, (int64_t) xRunCount);
544 }
545
sendCurrentTimestamp()546 aaudio_result_t AAudioServiceStreamBase::sendCurrentTimestamp() {
547 AAudioServiceMessage command;
548 // It is not worth filling up the queue with timestamps.
549 // That can cause the stream to get suspended.
550 // So just drop the timestamp if the queue is getting full.
551 if (isUpMessageQueueBusy()) {
552 return AAUDIO_OK;
553 }
554
555 // Send a timestamp for the clock model.
556 aaudio_result_t result = getFreeRunningPosition(&command.timestamp.position,
557 &command.timestamp.timestamp);
558 if (result == AAUDIO_OK) {
559 ALOGV("%s() SERVICE %8lld at %lld", __func__,
560 (long long) command.timestamp.position,
561 (long long) command.timestamp.timestamp);
562 command.what = AAudioServiceMessage::code::TIMESTAMP_SERVICE;
563 result = writeUpMessageQueue(&command);
564
565 if (result == AAUDIO_OK) {
566 // Send a hardware timestamp for presentation time.
567 result = getHardwareTimestamp(&command.timestamp.position,
568 &command.timestamp.timestamp);
569 if (result == AAUDIO_OK) {
570 ALOGV("%s() HARDWARE %8lld at %lld", __func__,
571 (long long) command.timestamp.position,
572 (long long) command.timestamp.timestamp);
573 command.what = AAudioServiceMessage::code::TIMESTAMP_HARDWARE;
574 result = writeUpMessageQueue(&command);
575 }
576 }
577 }
578
579 if (result == AAUDIO_ERROR_UNAVAILABLE) { // TODO review best error code
580 result = AAUDIO_OK; // just not available yet, try again later
581 }
582 return result;
583 }
584
585 /**
586 * Get an immutable description of the in-memory queues
587 * used to communicate with the underlying HAL or Service.
588 */
getDescription(AudioEndpointParcelable & parcelable)589 aaudio_result_t AAudioServiceStreamBase::getDescription(AudioEndpointParcelable &parcelable) {
590 std::lock_guard<std::mutex> lock(mLock);
591 {
592 std::lock_guard<std::mutex> lock(mUpMessageQueueLock);
593 if (mUpMessageQueue == nullptr) {
594 ALOGE("%s(): mUpMessageQueue null! - stream not open", __func__);
595 return AAUDIO_ERROR_NULL;
596 }
597 // Gather information on the message queue.
598 mUpMessageQueue->fillParcelable(parcelable,
599 parcelable.mUpMessageQueueParcelable);
600 }
601 return getAudioDataDescription(parcelable);
602 }
603
onVolumeChanged(float volume)604 void AAudioServiceStreamBase::onVolumeChanged(float volume) {
605 sendServiceEvent(AAUDIO_SERVICE_EVENT_VOLUME, volume);
606 }
607
incrementServiceReferenceCount_l()608 int32_t AAudioServiceStreamBase::incrementServiceReferenceCount_l() {
609 return ++mCallingCount;
610 }
611
decrementServiceReferenceCount_l()612 int32_t AAudioServiceStreamBase::decrementServiceReferenceCount_l() {
613 int32_t count = --mCallingCount;
614 // Each call to increment should be balanced with one call to decrement.
615 assert(count >= 0);
616 return count;
617 }
618