1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #include "media/audio/android/opensles_input.h"
7 #include "base/debug/trace_event.h"
8 #include "base/logging.h"
9 #include "media/audio/android/audio_manager_android.h"
10 #include "media/base/audio_bus.h"
12 #define LOG_ON_FAILURE_AND_RETURN(op, ...) \
14 SLresult err = (op); \
15 if (err != SL_RESULT_SUCCESS) { \
16 DLOG(ERROR) << #op << " failed: " << err; \
23 OpenSLESInputStream::OpenSLESInputStream(AudioManagerAndroid* audio_manager,
24 const AudioParameters& params)
25 : audio_manager_(audio_manager),
28 simple_buffer_queue_(NULL),
29 active_buffer_index_(0),
30 buffer_size_bytes_(0),
32 audio_bus_(media::AudioBus::Create(params)) {
33 DVLOG(2) << __PRETTY_FUNCTION__;
34 format_.formatType = SL_DATAFORMAT_PCM;
35 format_.numChannels = static_cast<SLuint32>(params.channels());
36 // Provides sampling rate in milliHertz to OpenSLES.
37 format_.samplesPerSec = static_cast<SLuint32>(params.sample_rate() * 1000);
38 format_.bitsPerSample = params.bits_per_sample();
39 format_.containerSize = params.bits_per_sample();
40 format_.endianness = SL_BYTEORDER_LITTLEENDIAN;
41 if (format_.numChannels == 1)
42 format_.channelMask = SL_SPEAKER_FRONT_CENTER;
43 else if (format_.numChannels == 2)
44 format_.channelMask = SL_SPEAKER_FRONT_LEFT | SL_SPEAKER_FRONT_RIGHT;
46 NOTREACHED() << "Unsupported number of channels: " << format_.numChannels;
48 buffer_size_bytes_ = params.GetBytesPerBuffer();
50 memset(&audio_data_, 0, sizeof(audio_data_));
53 OpenSLESInputStream::~OpenSLESInputStream() {
54 DVLOG(2) << __PRETTY_FUNCTION__;
55 DCHECK(thread_checker_.CalledOnValidThread());
56 DCHECK(!recorder_object_.Get());
57 DCHECK(!engine_object_.Get());
59 DCHECK(!simple_buffer_queue_);
60 DCHECK(!audio_data_[0]);
63 bool OpenSLESInputStream::Open() {
64 DVLOG(2) << __PRETTY_FUNCTION__;
65 DCHECK(thread_checker_.CalledOnValidThread());
66 if (engine_object_.Get())
69 if (!CreateRecorder())
77 void OpenSLESInputStream::Start(AudioInputCallback* callback) {
78 DVLOG(2) << __PRETTY_FUNCTION__;
79 DCHECK(thread_checker_.CalledOnValidThread());
82 DCHECK(simple_buffer_queue_);
86 base::AutoLock lock(lock_);
87 DCHECK(callback_ == NULL || callback_ == callback);
89 active_buffer_index_ = 0;
91 // Enqueues kMaxNumOfBuffersInQueue zero buffers to get the ball rolling.
92 // TODO(henrika): add support for Start/Stop/Start sequences when we are
93 // able to clear the buffer queue. There is currently a bug in the OpenSLES
94 // implementation which forces us to always call Stop() and Close() before
95 // calling Start() again.
96 SLresult err = SL_RESULT_UNKNOWN_ERROR;
97 for (int i = 0; i < kMaxNumOfBuffersInQueue; ++i) {
98 err = (*simple_buffer_queue_)->Enqueue(
99 simple_buffer_queue_, audio_data_[i], buffer_size_bytes_);
100 if (SL_RESULT_SUCCESS != err) {
107 // Start the recording by setting the state to SL_RECORDSTATE_RECORDING.
108 // When the object is in the SL_RECORDSTATE_RECORDING state, adding buffers
109 // will implicitly start the filling process.
110 err = (*recorder_)->SetRecordState(recorder_, SL_RECORDSTATE_RECORDING);
111 if (SL_RESULT_SUCCESS != err) {
120 void OpenSLESInputStream::Stop() {
121 DVLOG(2) << __PRETTY_FUNCTION__;
122 DCHECK(thread_checker_.CalledOnValidThread());
126 base::AutoLock lock(lock_);
128 // Stop recording by setting the record state to SL_RECORDSTATE_STOPPED.
129 LOG_ON_FAILURE_AND_RETURN(
130 (*recorder_)->SetRecordState(recorder_, SL_RECORDSTATE_STOPPED));
132 // Clear the buffer queue to get rid of old data when resuming recording.
133 LOG_ON_FAILURE_AND_RETURN(
134 (*simple_buffer_queue_)->Clear(simple_buffer_queue_));
140 void OpenSLESInputStream::Close() {
141 DVLOG(2) << __PRETTY_FUNCTION__;
142 DCHECK(thread_checker_.CalledOnValidThread());
144 // Stop the stream if it is still recording.
147 // TODO(henrika): Do we need to hold the lock here?
148 base::AutoLock lock(lock_);
150 // Destroy the buffer queue recorder object and invalidate all associated
152 recorder_object_.Reset();
153 simple_buffer_queue_ = NULL;
156 // Destroy the engine object. We don't store any associated interface for
158 engine_object_.Reset();
159 ReleaseAudioBuffer();
162 audio_manager_->ReleaseInputStream(this);
165 double OpenSLESInputStream::GetMaxVolume() {
170 void OpenSLESInputStream::SetVolume(double volume) {
174 double OpenSLESInputStream::GetVolume() {
179 void OpenSLESInputStream::SetAutomaticGainControl(bool enabled) {
183 bool OpenSLESInputStream::GetAutomaticGainControl() {
188 bool OpenSLESInputStream::CreateRecorder() {
189 DCHECK(thread_checker_.CalledOnValidThread());
190 DCHECK(!engine_object_.Get());
191 DCHECK(!recorder_object_.Get());
193 DCHECK(!simple_buffer_queue_);
195 // Initializes the engine object with specific option. After working with the
196 // object, we need to free the object and its resources.
197 SLEngineOption option[] = {
198 {SL_ENGINEOPTION_THREADSAFE, static_cast<SLuint32>(SL_BOOLEAN_TRUE)}};
199 LOG_ON_FAILURE_AND_RETURN(
200 slCreateEngine(engine_object_.Receive(), 1, option, 0, NULL, NULL),
203 // Realize the SL engine object in synchronous mode.
204 LOG_ON_FAILURE_AND_RETURN(
205 engine_object_->Realize(engine_object_.Get(), SL_BOOLEAN_FALSE), false);
207 // Get the SL engine interface which is implicit.
209 LOG_ON_FAILURE_AND_RETURN(engine_object_->GetInterface(
210 engine_object_.Get(), SL_IID_ENGINE, &engine),
213 // Audio source configuration.
214 SLDataLocator_IODevice mic_locator = {
215 SL_DATALOCATOR_IODEVICE, SL_IODEVICE_AUDIOINPUT,
216 SL_DEFAULTDEVICEID_AUDIOINPUT, NULL};
217 SLDataSource audio_source = {&mic_locator, NULL};
219 // Audio sink configuration.
220 SLDataLocator_AndroidSimpleBufferQueue buffer_queue = {
221 SL_DATALOCATOR_ANDROIDSIMPLEBUFFERQUEUE,
222 static_cast<SLuint32>(kMaxNumOfBuffersInQueue)};
223 SLDataSink audio_sink = {&buffer_queue, &format_};
225 // Create an audio recorder.
226 const SLInterfaceID interface_id[] = {SL_IID_ANDROIDSIMPLEBUFFERQUEUE,
227 SL_IID_ANDROIDCONFIGURATION};
228 const SLboolean interface_required[] = {SL_BOOLEAN_TRUE, SL_BOOLEAN_TRUE};
230 // Create AudioRecorder and specify SL_IID_ANDROIDCONFIGURATION.
231 LOG_ON_FAILURE_AND_RETURN(
232 (*engine)->CreateAudioRecorder(engine,
233 recorder_object_.Receive(),
236 arraysize(interface_id),
241 SLAndroidConfigurationItf recorder_config;
242 LOG_ON_FAILURE_AND_RETURN(
243 recorder_object_->GetInterface(recorder_object_.Get(),
244 SL_IID_ANDROIDCONFIGURATION,
248 // Uses the main microphone tuned for audio communications.
249 SLint32 stream_type = SL_ANDROID_RECORDING_PRESET_VOICE_COMMUNICATION;
250 LOG_ON_FAILURE_AND_RETURN(
251 (*recorder_config)->SetConfiguration(recorder_config,
252 SL_ANDROID_KEY_RECORDING_PRESET,
257 // Realize the recorder object in synchronous mode.
258 LOG_ON_FAILURE_AND_RETURN(
259 recorder_object_->Realize(recorder_object_.Get(), SL_BOOLEAN_FALSE),
262 // Get an implicit recorder interface.
263 LOG_ON_FAILURE_AND_RETURN(
264 recorder_object_->GetInterface(
265 recorder_object_.Get(), SL_IID_RECORD, &recorder_),
268 // Get the simple buffer queue interface.
269 LOG_ON_FAILURE_AND_RETURN(
270 recorder_object_->GetInterface(recorder_object_.Get(),
271 SL_IID_ANDROIDSIMPLEBUFFERQUEUE,
272 &simple_buffer_queue_),
275 // Register the input callback for the simple buffer queue.
276 // This callback will be called when receiving new data from the device.
277 LOG_ON_FAILURE_AND_RETURN(
278 (*simple_buffer_queue_)->RegisterCallback(
279 simple_buffer_queue_, SimpleBufferQueueCallback, this),
285 void OpenSLESInputStream::SimpleBufferQueueCallback(
286 SLAndroidSimpleBufferQueueItf buffer_queue,
288 OpenSLESInputStream* stream =
289 reinterpret_cast<OpenSLESInputStream*>(instance);
290 stream->ReadBufferQueue();
293 void OpenSLESInputStream::ReadBufferQueue() {
294 base::AutoLock lock(lock_);
298 TRACE_EVENT0("audio", "OpenSLESOutputStream::ReadBufferQueue");
300 // Convert from interleaved format to deinterleaved audio bus format.
301 audio_bus_->FromInterleaved(audio_data_[active_buffer_index_],
302 audio_bus_->frames(),
303 format_.bitsPerSample / 8);
305 // TODO(henrika): Investigate if it is possible to get an accurate
307 callback_->OnData(this, audio_bus_.get(), buffer_size_bytes_, 0.0);
309 // Done with this buffer. Send it to device for recording.
311 (*simple_buffer_queue_)->Enqueue(simple_buffer_queue_,
312 audio_data_[active_buffer_index_],
314 if (SL_RESULT_SUCCESS != err)
317 active_buffer_index_ = (active_buffer_index_ + 1) % kMaxNumOfBuffersInQueue;
320 void OpenSLESInputStream::SetupAudioBuffer() {
321 DCHECK(thread_checker_.CalledOnValidThread());
322 DCHECK(!audio_data_[0]);
323 for (int i = 0; i < kMaxNumOfBuffersInQueue; ++i) {
324 audio_data_[i] = new uint8[buffer_size_bytes_];
328 void OpenSLESInputStream::ReleaseAudioBuffer() {
329 DCHECK(thread_checker_.CalledOnValidThread());
330 if (audio_data_[0]) {
331 for (int i = 0; i < kMaxNumOfBuffersInQueue; ++i) {
332 delete[] audio_data_[i];
333 audio_data_[i] = NULL;
338 void OpenSLESInputStream::HandleError(SLresult error) {
339 DLOG(ERROR) << "OpenSLES Input error " << error;
341 callback_->OnError(this);