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/audio_manager_android.h"
7 #include "base/android/build_info.h"
8 #include "base/android/jni_array.h"
9 #include "base/android/jni_string.h"
10 #include "base/android/scoped_java_ref.h"
11 #include "base/logging.h"
12 #include "base/strings/string_number_conversions.h"
13 #include "jni/AudioManagerAndroid_jni.h"
14 #include "media/audio/android/audio_record_input.h"
15 #include "media/audio/android/opensles_input.h"
16 #include "media/audio/android/opensles_output.h"
17 #include "media/audio/audio_manager.h"
18 #include "media/audio/audio_parameters.h"
19 #include "media/audio/fake_audio_input_stream.h"
20 #include "media/base/channel_layout.h"
22 using base::android::AppendJavaStringArrayToStringVector;
23 using base::android::AttachCurrentThread;
24 using base::android::ConvertJavaStringToUTF8;
25 using base::android::ConvertUTF8ToJavaString;
26 using base::android::ScopedJavaLocalRef;
30 static void AddDefaultDevice(AudioDeviceNames* device_names) {
31 DCHECK(device_names->empty());
32 device_names->push_front(
33 AudioDeviceName(AudioManagerBase::kDefaultDeviceName,
34 AudioManagerBase::kDefaultDeviceId));
37 // Maximum number of output streams that can be open simultaneously.
38 static const int kMaxOutputStreams = 10;
40 static const int kDefaultInputBufferSize = 1024;
41 static const int kDefaultOutputBufferSize = 2048;
43 AudioManager* CreateAudioManager(AudioLogFactory* audio_log_factory) {
44 return new AudioManagerAndroid(audio_log_factory);
47 AudioManagerAndroid::AudioManagerAndroid(AudioLogFactory* audio_log_factory)
48 : AudioManagerBase(audio_log_factory),
49 communication_mode_is_on_(false) {
50 SetMaxOutputStreamsAllowed(kMaxOutputStreams);
52 j_audio_manager_.Reset(
53 Java_AudioManagerAndroid_createAudioManagerAndroid(
54 base::android::AttachCurrentThread(),
55 base::android::GetApplicationContext(),
56 reinterpret_cast<intptr_t>(this)));
60 AudioManagerAndroid::~AudioManagerAndroid() {
65 bool AudioManagerAndroid::HasAudioOutputDevices() {
69 bool AudioManagerAndroid::HasAudioInputDevices() {
73 void AudioManagerAndroid::GetAudioInputDeviceNames(
74 AudioDeviceNames* device_names) {
75 // Always add default device parameters as first element.
76 DCHECK(device_names->empty());
77 AddDefaultDevice(device_names);
79 JNIEnv* env = AttachCurrentThread();
80 ScopedJavaLocalRef<jobjectArray> j_device_array =
81 Java_AudioManagerAndroid_getAudioInputDeviceNames(
82 env, j_audio_manager_.obj());
83 jsize len = env->GetArrayLength(j_device_array.obj());
84 AudioDeviceName device;
85 for (jsize i = 0; i < len; ++i) {
86 ScopedJavaLocalRef<jobject> j_device(
87 env, env->GetObjectArrayElement(j_device_array.obj(), i));
88 ScopedJavaLocalRef<jstring> j_device_name =
89 Java_AudioDeviceName_name(env, j_device.obj());
90 ConvertJavaStringToUTF8(env, j_device_name.obj(), &device.device_name);
91 ScopedJavaLocalRef<jstring> j_device_id =
92 Java_AudioDeviceName_id(env, j_device.obj());
93 ConvertJavaStringToUTF8(env, j_device_id.obj(), &device.unique_id);
94 device_names->push_back(device);
98 void AudioManagerAndroid::GetAudioOutputDeviceNames(
99 AudioDeviceNames* device_names) {
100 // TODO(henrika): enumerate using GetAudioInputDeviceNames().
101 AddDefaultDevice(device_names);
104 AudioParameters AudioManagerAndroid::GetInputStreamParameters(
105 const std::string& device_id) {
106 JNIEnv* env = AttachCurrentThread();
107 // Use mono as preferred number of input channels on Android to save
108 // resources. Using mono also avoids a driver issue seen on Samsung
109 // Galaxy S3 and S4 devices. See http://crbug.com/256851 for details.
110 ChannelLayout channel_layout = CHANNEL_LAYOUT_MONO;
111 int buffer_size = Java_AudioManagerAndroid_getMinInputFrameSize(
112 env, GetNativeOutputSampleRate(),
113 ChannelLayoutToChannelCount(channel_layout));
114 int effects = AudioParameters::NO_EFFECTS;
115 effects |= Java_AudioManagerAndroid_shouldUseAcousticEchoCanceler(env) ?
116 AudioParameters::ECHO_CANCELLER : AudioParameters::NO_EFFECTS;
117 AudioParameters params(
118 AudioParameters::AUDIO_PCM_LOW_LATENCY, channel_layout, 0,
119 GetNativeOutputSampleRate(), 16,
120 buffer_size <= 0 ? kDefaultInputBufferSize : buffer_size, effects);
124 AudioOutputStream* AudioManagerAndroid::MakeAudioOutputStream(
125 const AudioParameters& params,
126 const std::string& device_id) {
127 AudioOutputStream* stream =
128 AudioManagerBase::MakeAudioOutputStream(params, std::string());
131 base::AutoLock lock(streams_lock_);
132 streams_.insert(static_cast<OpenSLESOutputStream*>(stream));
138 AudioInputStream* AudioManagerAndroid::MakeAudioInputStream(
139 const AudioParameters& params, const std::string& device_id) {
140 bool has_no_input_streams = HasNoAudioInputStreams();
141 AudioInputStream* stream =
142 AudioManagerBase::MakeAudioInputStream(params, device_id);
144 // The audio manager for Android creates streams intended for real-time
145 // VoIP sessions and therefore sets the audio mode to MODE_IN_COMMUNICATION.
146 // If a Bluetooth headset is used, the audio stream will use the SCO
147 // channel and therefore have a limited bandwidth (8kHz).
148 if (stream && has_no_input_streams) {
149 communication_mode_is_on_ = true;
150 SetCommunicationAudioModeOn(true);
155 void AudioManagerAndroid::ReleaseOutputStream(AudioOutputStream* stream) {
156 AudioManagerBase::ReleaseOutputStream(stream);
158 base::AutoLock lock(streams_lock_);
159 streams_.erase(static_cast<OpenSLESOutputStream*>(stream));
162 void AudioManagerAndroid::ReleaseInputStream(AudioInputStream* stream) {
163 AudioManagerBase::ReleaseInputStream(stream);
165 // Restore the audio mode which was used before the first communication-
166 // mode stream was created.
167 if (HasNoAudioInputStreams()) {
168 communication_mode_is_on_ = false;
169 SetCommunicationAudioModeOn(false);
173 AudioOutputStream* AudioManagerAndroid::MakeLinearOutputStream(
174 const AudioParameters& params) {
175 DCHECK_EQ(AudioParameters::AUDIO_PCM_LINEAR, params.format());
176 return new OpenSLESOutputStream(this, params, SL_ANDROID_STREAM_MEDIA);
179 AudioOutputStream* AudioManagerAndroid::MakeLowLatencyOutputStream(
180 const AudioParameters& params,
181 const std::string& device_id) {
182 DLOG_IF(ERROR, !device_id.empty()) << "Not implemented!";
183 DCHECK_EQ(AudioParameters::AUDIO_PCM_LOW_LATENCY, params.format());
185 // Set stream type which matches the current system-wide audio mode used by
186 // the Android audio manager.
187 const SLint32 stream_type = communication_mode_is_on_ ?
188 SL_ANDROID_STREAM_VOICE : SL_ANDROID_STREAM_MEDIA;
189 return new OpenSLESOutputStream(this, params, stream_type);
192 AudioInputStream* AudioManagerAndroid::MakeLinearInputStream(
193 const AudioParameters& params, const std::string& device_id) {
194 // TODO(henrika): add support for device selection if/when any client
196 DLOG_IF(ERROR, !device_id.empty()) << "Not implemented!";
197 DCHECK_EQ(AudioParameters::AUDIO_PCM_LINEAR, params.format());
198 return new OpenSLESInputStream(this, params);
201 AudioInputStream* AudioManagerAndroid::MakeLowLatencyInputStream(
202 const AudioParameters& params, const std::string& device_id) {
203 DCHECK_EQ(AudioParameters::AUDIO_PCM_LOW_LATENCY, params.format());
204 DLOG_IF(ERROR, device_id.empty()) << "Invalid device ID!";
205 // Use the device ID to select the correct input device.
206 // Note that the input device is always associated with a certain output
207 // device, i.e., this selection does also switch the output device.
208 // All input and output streams will be affected by the device selection.
209 if (!SetAudioDevice(device_id)) {
210 LOG(ERROR) << "Unable to select audio device!";
214 if (params.effects() != AudioParameters::NO_EFFECTS) {
215 // Platform effects can only be enabled through the AudioRecord path.
216 // An effect should only have been requested here if recommended by
217 // AudioManagerAndroid.shouldUse<Effect>.
219 // Creating this class requires Jelly Bean, which is already guaranteed by
220 // shouldUse<Effect>. Only DCHECK on that condition to allow tests to use
221 // the effect settings as a way to select the input path.
222 DCHECK_GE(base::android::BuildInfo::GetInstance()->sdk_int(), 16);
223 DVLOG(1) << "Creating AudioRecordInputStream";
224 return new AudioRecordInputStream(this, params);
226 DVLOG(1) << "Creating OpenSLESInputStream";
227 return new OpenSLESInputStream(this, params);
230 int AudioManagerAndroid::GetOptimalOutputFrameSize(int sample_rate,
232 if (IsAudioLowLatencySupported()) {
233 return GetAudioLowLatencyOutputFrameSize();
235 return std::max(kDefaultOutputBufferSize,
236 Java_AudioManagerAndroid_getMinOutputFrameSize(
237 base::android::AttachCurrentThread(),
238 sample_rate, channels));
242 AudioParameters AudioManagerAndroid::GetPreferredOutputStreamParameters(
243 const std::string& output_device_id,
244 const AudioParameters& input_params) {
245 // TODO(tommi): Support |output_device_id|.
246 DLOG_IF(ERROR, !output_device_id.empty()) << "Not implemented!";
247 ChannelLayout channel_layout = CHANNEL_LAYOUT_STEREO;
248 int sample_rate = GetNativeOutputSampleRate();
249 int buffer_size = GetOptimalOutputFrameSize(sample_rate, 2);
250 int bits_per_sample = 16;
251 int input_channels = 0;
252 if (input_params.IsValid()) {
253 // Use the client's input parameters if they are valid.
254 sample_rate = input_params.sample_rate();
255 bits_per_sample = input_params.bits_per_sample();
256 channel_layout = input_params.channel_layout();
257 input_channels = input_params.input_channels();
258 buffer_size = GetOptimalOutputFrameSize(
259 sample_rate, ChannelLayoutToChannelCount(channel_layout));
262 int user_buffer_size = GetUserBufferSize();
263 if (user_buffer_size)
264 buffer_size = user_buffer_size;
266 return AudioParameters(
267 AudioParameters::AUDIO_PCM_LOW_LATENCY, channel_layout, input_channels,
268 sample_rate, bits_per_sample, buffer_size, AudioParameters::NO_EFFECTS);
271 bool AudioManagerAndroid::HasNoAudioInputStreams() {
272 return input_stream_count() == 0;
276 bool AudioManagerAndroid::RegisterAudioManager(JNIEnv* env) {
277 return RegisterNativesImpl(env);
280 void AudioManagerAndroid::Init() {
281 Java_AudioManagerAndroid_init(
282 base::android::AttachCurrentThread(),
283 j_audio_manager_.obj());
286 void AudioManagerAndroid::Close() {
287 Java_AudioManagerAndroid_close(
288 base::android::AttachCurrentThread(),
289 j_audio_manager_.obj());
292 void AudioManagerAndroid::SetMute(JNIEnv* env, jobject obj, jboolean muted) {
293 GetTaskRunner()->PostTask(
296 &AudioManagerAndroid::DoSetMuteOnAudioThread,
297 base::Unretained(this),
301 void AudioManagerAndroid::DoSetMuteOnAudioThread(bool muted) {
302 base::AutoLock lock(streams_lock_);
303 for (OutputStreams::iterator it = streams_.begin();
304 it != streams_.end(); ++it) {
305 (*it)->SetMute(muted);
309 void AudioManagerAndroid::SetCommunicationAudioModeOn(bool on) {
310 Java_AudioManagerAndroid_setCommunicationAudioModeOn(
311 base::android::AttachCurrentThread(),
312 j_audio_manager_.obj(), on);
315 bool AudioManagerAndroid::SetAudioDevice(const std::string& device_id) {
316 JNIEnv* env = AttachCurrentThread();
318 // Send the unique device ID to the Java audio manager and make the
319 // device switch. Provide an empty string to the Java audio manager
320 // if the default device is selected.
321 ScopedJavaLocalRef<jstring> j_device_id = ConvertUTF8ToJavaString(
323 device_id == AudioManagerBase::kDefaultDeviceId ?
324 std::string() : device_id);
325 return Java_AudioManagerAndroid_setDevice(
326 env, j_audio_manager_.obj(), j_device_id.obj());
329 int AudioManagerAndroid::GetNativeOutputSampleRate() {
330 return Java_AudioManagerAndroid_getNativeOutputSampleRate(
331 base::android::AttachCurrentThread(),
332 j_audio_manager_.obj());
335 bool AudioManagerAndroid::IsAudioLowLatencySupported() {
336 return Java_AudioManagerAndroid_isAudioLowLatencySupported(
337 base::android::AttachCurrentThread(),
338 j_audio_manager_.obj());
341 int AudioManagerAndroid::GetAudioLowLatencyOutputFrameSize() {
342 return Java_AudioManagerAndroid_getAudioLowLatencyOutputFrameSize(
343 base::android::AttachCurrentThread(),
344 j_audio_manager_.obj());