AudioSystem.h revision b235dee7be544a6c990ba4f8d89ab03e38c826f8
1/* 2 * Copyright (C) 2008 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#ifndef ANDROID_AUDIOSYSTEM_H_ 18#define ANDROID_AUDIOSYSTEM_H_ 19 20#include <utils/RefBase.h> 21#include <utils/threads.h> 22#include <media/IAudioFlinger.h> 23 24namespace android { 25 26typedef void (*audio_error_callback)(status_t err); 27typedef int audio_io_handle_t; 28 29class IAudioPolicyService; 30class String8; 31 32class AudioSystem 33{ 34public: 35 36 enum stream_type { 37 DEFAULT =-1, 38 VOICE_CALL = 0, 39 SYSTEM = 1, 40 RING = 2, 41 MUSIC = 3, 42 ALARM = 4, 43 NOTIFICATION = 5, 44 BLUETOOTH_SCO = 6, 45 ENFORCED_AUDIBLE = 7, // Sounds that cannot be muted by user and must be routed to speaker 46 DTMF = 8, 47 TTS = 9, 48 NUM_STREAM_TYPES 49 }; 50 51 // Audio sub formats (see AudioSystem::audio_format). 52 enum pcm_sub_format { 53 PCM_SUB_16_BIT = 0x1, // must be 1 for backward compatibility 54 PCM_SUB_8_BIT = 0x2, // must be 2 for backward compatibility 55 }; 56 57 // MP3 sub format field definition : can use 11 LSBs in the same way as MP3 frame header to specify 58 // bit rate, stereo mode, version... 59 enum mp3_sub_format { 60 //TODO 61 }; 62 63 // AMR NB/WB sub format field definition: specify frame block interleaving, bandwidth efficient or octet aligned, 64 // encoding mode for recording... 65 enum amr_sub_format { 66 //TODO 67 }; 68 69 // AAC sub format field definition: specify profile or bitrate for recording... 70 enum aac_sub_format { 71 //TODO 72 }; 73 74 // VORBIS sub format field definition: specify quality for recording... 75 enum vorbis_sub_format { 76 //TODO 77 }; 78 79 // Audio format consists in a main format field (upper 8 bits) and a sub format field (lower 24 bits). 80 // The main format indicates the main codec type. The sub format field indicates options and parameters 81 // for each format. The sub format is mainly used for record to indicate for instance the requested bitrate 82 // or profile. It can also be used for certain formats to give informations not present in the encoded 83 // audio stream (e.g. octet alignement for AMR). 84 enum audio_format { 85 INVALID_FORMAT = -1, 86 FORMAT_DEFAULT = 0, 87 PCM = 0x00000000, // must be 0 for backward compatibility 88 MP3 = 0x01000000, 89 AMR_NB = 0x02000000, 90 AMR_WB = 0x03000000, 91 AAC = 0x04000000, 92 HE_AAC_V1 = 0x05000000, 93 HE_AAC_V2 = 0x06000000, 94 VORBIS = 0x07000000, 95 MAIN_FORMAT_MASK = 0xFF000000, 96 SUB_FORMAT_MASK = 0x00FFFFFF, 97 // Aliases 98 PCM_16_BIT = (PCM|PCM_SUB_16_BIT), 99 PCM_8_BIT = (PCM|PCM_SUB_8_BIT) 100 }; 101 102 103 // Channel mask definitions must be kept in sync with JAVA values in /media/java/android/media/AudioFormat.java 104 enum audio_channels { 105 // output channels 106 CHANNEL_OUT_FRONT_LEFT = 0x4, 107 CHANNEL_OUT_FRONT_RIGHT = 0x8, 108 CHANNEL_OUT_FRONT_CENTER = 0x10, 109 CHANNEL_OUT_LOW_FREQUENCY = 0x20, 110 CHANNEL_OUT_BACK_LEFT = 0x40, 111 CHANNEL_OUT_BACK_RIGHT = 0x80, 112 CHANNEL_OUT_FRONT_LEFT_OF_CENTER = 0x100, 113 CHANNEL_OUT_FRONT_RIGHT_OF_CENTER = 0x200, 114 CHANNEL_OUT_BACK_CENTER = 0x400, 115 CHANNEL_OUT_MONO = CHANNEL_OUT_FRONT_LEFT, 116 CHANNEL_OUT_STEREO = (CHANNEL_OUT_FRONT_LEFT | CHANNEL_OUT_FRONT_RIGHT), 117 CHANNEL_OUT_QUAD = (CHANNEL_OUT_FRONT_LEFT | CHANNEL_OUT_FRONT_RIGHT | 118 CHANNEL_OUT_BACK_LEFT | CHANNEL_OUT_BACK_RIGHT), 119 CHANNEL_OUT_SURROUND = (CHANNEL_OUT_FRONT_LEFT | CHANNEL_OUT_FRONT_RIGHT | 120 CHANNEL_OUT_FRONT_CENTER | CHANNEL_OUT_BACK_CENTER), 121 CHANNEL_OUT_5POINT1 = (CHANNEL_OUT_FRONT_LEFT | CHANNEL_OUT_FRONT_RIGHT | 122 CHANNEL_OUT_FRONT_CENTER | CHANNEL_OUT_LOW_FREQUENCY | CHANNEL_OUT_BACK_LEFT | CHANNEL_OUT_BACK_RIGHT), 123 CHANNEL_OUT_7POINT1 = (CHANNEL_OUT_FRONT_LEFT | CHANNEL_OUT_FRONT_RIGHT | 124 CHANNEL_OUT_FRONT_CENTER | CHANNEL_OUT_LOW_FREQUENCY | CHANNEL_OUT_BACK_LEFT | CHANNEL_OUT_BACK_RIGHT | 125 CHANNEL_OUT_FRONT_LEFT_OF_CENTER | CHANNEL_OUT_FRONT_RIGHT_OF_CENTER), 126 CHANNEL_OUT_ALL = (CHANNEL_OUT_FRONT_LEFT | CHANNEL_OUT_FRONT_RIGHT | 127 CHANNEL_OUT_FRONT_CENTER | CHANNEL_OUT_LOW_FREQUENCY | CHANNEL_OUT_BACK_LEFT | CHANNEL_OUT_BACK_RIGHT | 128 CHANNEL_OUT_FRONT_LEFT_OF_CENTER | CHANNEL_OUT_FRONT_RIGHT_OF_CENTER | CHANNEL_OUT_BACK_CENTER), 129 130 // input channels 131 CHANNEL_IN_LEFT = 0x4, 132 CHANNEL_IN_RIGHT = 0x8, 133 CHANNEL_IN_FRONT = 0x10, 134 CHANNEL_IN_BACK = 0x20, 135 CHANNEL_IN_LEFT_PROCESSED = 0x40, 136 CHANNEL_IN_RIGHT_PROCESSED = 0x80, 137 CHANNEL_IN_FRONT_PROCESSED = 0x100, 138 CHANNEL_IN_BACK_PROCESSED = 0x200, 139 CHANNEL_IN_PRESSURE = 0x400, 140 CHANNEL_IN_X_AXIS = 0x800, 141 CHANNEL_IN_Y_AXIS = 0x1000, 142 CHANNEL_IN_Z_AXIS = 0x2000, 143 CHANNEL_IN_VOICE_UPLINK = 0x4000, 144 CHANNEL_IN_VOICE_DNLINK = 0x8000, 145 CHANNEL_IN_MONO = CHANNEL_IN_FRONT, 146 CHANNEL_IN_STEREO = (CHANNEL_IN_LEFT | CHANNEL_IN_RIGHT), 147 CHANNEL_IN_ALL = (CHANNEL_IN_LEFT | CHANNEL_IN_RIGHT | CHANNEL_IN_FRONT | CHANNEL_IN_BACK| 148 CHANNEL_IN_LEFT_PROCESSED | CHANNEL_IN_RIGHT_PROCESSED | CHANNEL_IN_FRONT_PROCESSED | CHANNEL_IN_BACK_PROCESSED| 149 CHANNEL_IN_PRESSURE | CHANNEL_IN_X_AXIS | CHANNEL_IN_Y_AXIS | CHANNEL_IN_Z_AXIS | 150 CHANNEL_IN_VOICE_UPLINK | CHANNEL_IN_VOICE_DNLINK) 151 }; 152 153 enum audio_mode { 154 MODE_INVALID = -2, 155 MODE_CURRENT = -1, 156 MODE_NORMAL = 0, 157 MODE_RINGTONE, 158 MODE_IN_CALL, 159 NUM_MODES // not a valid entry, denotes end-of-list 160 }; 161 162 enum audio_in_acoustics { 163 AGC_ENABLE = 0x0001, 164 AGC_DISABLE = 0, 165 NS_ENABLE = 0x0002, 166 NS_DISABLE = 0, 167 TX_IIR_ENABLE = 0x0004, 168 TX_DISABLE = 0 169 }; 170 171 // special audio session values 172 enum audio_sessions { 173 SESSION_OUTPUT_STAGE = -1, // session for effects attached to a particular output stream 174 // (value must be less than 0) 175 SESSION_OUTPUT_MIX = 0, // session for effects applied to output mix. These effects can 176 // be moved by audio policy manager to another output stream 177 // (value must be 0) 178 }; 179 180 /* These are static methods to control the system-wide AudioFlinger 181 * only privileged processes can have access to them 182 */ 183 184 // mute/unmute microphone 185 static status_t muteMicrophone(bool state); 186 static status_t isMicrophoneMuted(bool *state); 187 188 // set/get master volume 189 static status_t setMasterVolume(float value); 190 static status_t getMasterVolume(float* volume); 191 // mute/unmute audio outputs 192 static status_t setMasterMute(bool mute); 193 static status_t getMasterMute(bool* mute); 194 195 // set/get stream volume on specified output 196 static status_t setStreamVolume(int stream, float value, int output); 197 static status_t getStreamVolume(int stream, float* volume, int output); 198 199 // mute/unmute stream 200 static status_t setStreamMute(int stream, bool mute); 201 static status_t getStreamMute(int stream, bool* mute); 202 203 // set audio mode in audio hardware (see AudioSystem::audio_mode) 204 static status_t setMode(int mode); 205 206 // returns true in *state if tracks are active on the specified stream 207 static status_t isStreamActive(int stream, bool *state); 208 209 // set/get audio hardware parameters. The function accepts a list of parameters 210 // key value pairs in the form: key1=value1;key2=value2;... 211 // Some keys are reserved for standard parameters (See AudioParameter class). 212 static status_t setParameters(audio_io_handle_t ioHandle, const String8& keyValuePairs); 213 static String8 getParameters(audio_io_handle_t ioHandle, const String8& keys); 214 215 static void setErrorCallback(audio_error_callback cb); 216 217 // helper function to obtain AudioFlinger service handle 218 static const sp<IAudioFlinger>& get_audio_flinger(); 219 220 static float linearToLog(int volume); 221 static int logToLinear(float volume); 222 223 static status_t getOutputSamplingRate(int* samplingRate, int stream = DEFAULT); 224 static status_t getOutputFrameCount(int* frameCount, int stream = DEFAULT); 225 static status_t getOutputLatency(uint32_t* latency, int stream = DEFAULT); 226 227 static bool routedToA2dpOutput(int streamType); 228 229 static status_t getInputBufferSize(uint32_t sampleRate, int format, int channelCount, 230 size_t* buffSize); 231 232 static status_t setVoiceVolume(float volume); 233 234 // return the number of audio frames written by AudioFlinger to audio HAL and 235 // audio dsp to DAC since the output on which the specificed stream is playing 236 // has exited standby. 237 // returned status (from utils/Errors.h) can be: 238 // - NO_ERROR: successful operation, halFrames and dspFrames point to valid data 239 // - INVALID_OPERATION: Not supported on current hardware platform 240 // - BAD_VALUE: invalid parameter 241 // NOTE: this feature is not supported on all hardware platforms and it is 242 // necessary to check returned status before using the returned values. 243 static status_t getRenderPosition(uint32_t *halFrames, uint32_t *dspFrames, int stream = DEFAULT); 244 245 static unsigned int getInputFramesLost(audio_io_handle_t ioHandle); 246 247 static int newAudioSessionId(); 248 // 249 // AudioPolicyService interface 250 // 251 252 enum audio_devices { 253 // output devices 254 DEVICE_OUT_EARPIECE = 0x1, 255 DEVICE_OUT_SPEAKER = 0x2, 256 DEVICE_OUT_WIRED_HEADSET = 0x4, 257 DEVICE_OUT_WIRED_HEADPHONE = 0x8, 258 DEVICE_OUT_BLUETOOTH_SCO = 0x10, 259 DEVICE_OUT_BLUETOOTH_SCO_HEADSET = 0x20, 260 DEVICE_OUT_BLUETOOTH_SCO_CARKIT = 0x40, 261 DEVICE_OUT_BLUETOOTH_A2DP = 0x80, 262 DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES = 0x100, 263 DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER = 0x200, 264 DEVICE_OUT_AUX_DIGITAL = 0x400, 265 DEVICE_OUT_ANLG_DOCK_HEADSET = 0x800, 266 DEVICE_OUT_DGTL_DOCK_HEADSET = 0x1000, 267 DEVICE_OUT_DEFAULT = 0x8000, 268 DEVICE_OUT_ALL = (DEVICE_OUT_EARPIECE | DEVICE_OUT_SPEAKER | DEVICE_OUT_WIRED_HEADSET | 269 DEVICE_OUT_WIRED_HEADPHONE | DEVICE_OUT_BLUETOOTH_SCO | DEVICE_OUT_BLUETOOTH_SCO_HEADSET | 270 DEVICE_OUT_BLUETOOTH_SCO_CARKIT | DEVICE_OUT_BLUETOOTH_A2DP | DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES | 271 DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER | DEVICE_OUT_AUX_DIGITAL | 272 DEVICE_OUT_ANLG_DOCK_HEADSET | DEVICE_OUT_DGTL_DOCK_HEADSET | 273 DEVICE_OUT_DEFAULT), 274 DEVICE_OUT_ALL_A2DP = (DEVICE_OUT_BLUETOOTH_A2DP | DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES | 275 DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER), 276 277 // input devices 278 DEVICE_IN_COMMUNICATION = 0x10000, 279 DEVICE_IN_AMBIENT = 0x20000, 280 DEVICE_IN_BUILTIN_MIC = 0x40000, 281 DEVICE_IN_BLUETOOTH_SCO_HEADSET = 0x80000, 282 DEVICE_IN_WIRED_HEADSET = 0x100000, 283 DEVICE_IN_AUX_DIGITAL = 0x200000, 284 DEVICE_IN_VOICE_CALL = 0x400000, 285 DEVICE_IN_BACK_MIC = 0x800000, 286 DEVICE_IN_DEFAULT = 0x80000000, 287 288 DEVICE_IN_ALL = (DEVICE_IN_COMMUNICATION | DEVICE_IN_AMBIENT | DEVICE_IN_BUILTIN_MIC | 289 DEVICE_IN_BLUETOOTH_SCO_HEADSET | DEVICE_IN_WIRED_HEADSET | DEVICE_IN_AUX_DIGITAL | 290 DEVICE_IN_VOICE_CALL | DEVICE_IN_BACK_MIC | DEVICE_IN_DEFAULT) 291 }; 292 293 // device connection states used for setDeviceConnectionState() 294 enum device_connection_state { 295 DEVICE_STATE_UNAVAILABLE, 296 DEVICE_STATE_AVAILABLE, 297 NUM_DEVICE_STATES 298 }; 299 300 // request to open a direct output with getOutput() (by opposition to sharing an output with other AudioTracks) 301 enum output_flags { 302 OUTPUT_FLAG_INDIRECT = 0x0, 303 OUTPUT_FLAG_DIRECT = 0x1 304 }; 305 306 // device categories used for setForceUse() 307 enum forced_config { 308 FORCE_NONE, 309 FORCE_SPEAKER, 310 FORCE_HEADPHONES, 311 FORCE_BT_SCO, 312 FORCE_BT_A2DP, 313 FORCE_WIRED_ACCESSORY, 314 FORCE_BT_CAR_DOCK, 315 FORCE_BT_DESK_DOCK, 316 FORCE_ANALOG_DOCK, 317 FORCE_DIGITAL_DOCK, 318 NUM_FORCE_CONFIG, 319 FORCE_DEFAULT = FORCE_NONE 320 }; 321 322 // usages used for setForceUse() 323 enum force_use { 324 FOR_COMMUNICATION, 325 FOR_MEDIA, 326 FOR_RECORD, 327 FOR_DOCK, 328 NUM_FORCE_USE 329 }; 330 331 // types of io configuration change events received with ioConfigChanged() 332 enum io_config_event { 333 OUTPUT_OPENED, 334 OUTPUT_CLOSED, 335 OUTPUT_CONFIG_CHANGED, 336 INPUT_OPENED, 337 INPUT_CLOSED, 338 INPUT_CONFIG_CHANGED, 339 STREAM_CONFIG_CHANGED, 340 NUM_CONFIG_EVENTS 341 }; 342 343 // audio output descritor used to cache output configurations in client process to avoid frequent calls 344 // through IAudioFlinger 345 class OutputDescriptor { 346 public: 347 OutputDescriptor() 348 : samplingRate(0), format(0), channels(0), frameCount(0), latency(0) {} 349 350 uint32_t samplingRate; 351 int32_t format; 352 int32_t channels; 353 size_t frameCount; 354 uint32_t latency; 355 }; 356 357 // 358 // IAudioPolicyService interface (see AudioPolicyInterface for method descriptions) 359 // 360 static status_t setDeviceConnectionState(audio_devices device, device_connection_state state, const char *device_address); 361 static device_connection_state getDeviceConnectionState(audio_devices device, const char *device_address); 362 static status_t setPhoneState(int state); 363 static status_t setRingerMode(uint32_t mode, uint32_t mask); 364 static status_t setForceUse(force_use usage, forced_config config); 365 static forced_config getForceUse(force_use usage); 366 static audio_io_handle_t getOutput(stream_type stream, 367 uint32_t samplingRate = 0, 368 uint32_t format = FORMAT_DEFAULT, 369 uint32_t channels = CHANNEL_OUT_STEREO, 370 output_flags flags = OUTPUT_FLAG_INDIRECT); 371 static status_t startOutput(audio_io_handle_t output, 372 AudioSystem::stream_type stream, 373 int session = 0); 374 static status_t stopOutput(audio_io_handle_t output, 375 AudioSystem::stream_type stream, 376 int session = 0); 377 static void releaseOutput(audio_io_handle_t output); 378 static audio_io_handle_t getInput(int inputSource, 379 uint32_t samplingRate = 0, 380 uint32_t format = FORMAT_DEFAULT, 381 uint32_t channels = CHANNEL_IN_MONO, 382 audio_in_acoustics acoustics = (audio_in_acoustics)0); 383 static status_t startInput(audio_io_handle_t input); 384 static status_t stopInput(audio_io_handle_t input); 385 static void releaseInput(audio_io_handle_t input); 386 static status_t initStreamVolume(stream_type stream, 387 int indexMin, 388 int indexMax); 389 static status_t setStreamVolumeIndex(stream_type stream, int index); 390 static status_t getStreamVolumeIndex(stream_type stream, int *index); 391 392 static uint32_t getStrategyForStream(stream_type stream); 393 394 static audio_io_handle_t getOutputForEffect(effect_descriptor_t *desc); 395 static status_t registerEffect(effect_descriptor_t *desc, 396 audio_io_handle_t output, 397 uint32_t strategy, 398 int session, 399 int id); 400 static status_t unregisterEffect(int id); 401 402 static const sp<IAudioPolicyService>& get_audio_policy_service(); 403 404 // ---------------------------------------------------------------------------- 405 406 static uint32_t popCount(uint32_t u); 407 static bool isOutputDevice(audio_devices device); 408 static bool isInputDevice(audio_devices device); 409 static bool isA2dpDevice(audio_devices device); 410 static bool isBluetoothScoDevice(audio_devices device); 411 static bool isLowVisibility(stream_type stream); 412 static bool isOutputChannel(uint32_t channel); 413 static bool isInputChannel(uint32_t channel); 414 static bool isValidFormat(uint32_t format); 415 static bool isLinearPCM(uint32_t format); 416 417private: 418 419 class AudioFlingerClient: public IBinder::DeathRecipient, public BnAudioFlingerClient 420 { 421 public: 422 AudioFlingerClient() { 423 } 424 425 // DeathRecipient 426 virtual void binderDied(const wp<IBinder>& who); 427 428 // IAudioFlingerClient 429 430 // indicate a change in the configuration of an output or input: keeps the cached 431 // values for output/input parameters upto date in client process 432 virtual void ioConfigChanged(int event, int ioHandle, void *param2); 433 }; 434 435 class AudioPolicyServiceClient: public IBinder::DeathRecipient 436 { 437 public: 438 AudioPolicyServiceClient() { 439 } 440 441 // DeathRecipient 442 virtual void binderDied(const wp<IBinder>& who); 443 }; 444 445 static sp<AudioFlingerClient> gAudioFlingerClient; 446 static sp<AudioPolicyServiceClient> gAudioPolicyServiceClient; 447 friend class AudioFlingerClient; 448 friend class AudioPolicyServiceClient; 449 450 static Mutex gLock; 451 static sp<IAudioFlinger> gAudioFlinger; 452 static audio_error_callback gAudioErrorCallback; 453 454 static size_t gInBuffSize; 455 // previous parameters for recording buffer size queries 456 static uint32_t gPrevInSamplingRate; 457 static int gPrevInFormat; 458 static int gPrevInChannelCount; 459 460 static sp<IAudioPolicyService> gAudioPolicyService; 461 462 // mapping between stream types and outputs 463 static DefaultKeyedVector<int, audio_io_handle_t> gStreamOutputMap; 464 // list of output descritor containing cached parameters (sampling rate, framecount, channel count...) 465 static DefaultKeyedVector<audio_io_handle_t, OutputDescriptor *> gOutputs; 466}; 467 468class AudioParameter { 469 470public: 471 AudioParameter() {} 472 AudioParameter(const String8& keyValuePairs); 473 virtual ~AudioParameter(); 474 475 // reserved parameter keys for changeing standard parameters with setParameters() function. 476 // Using these keys is mandatory for AudioFlinger to properly monitor audio output/input 477 // configuration changes and act accordingly. 478 // keyRouting: to change audio routing, value is an int in AudioSystem::audio_devices 479 // keySamplingRate: to change sampling rate routing, value is an int 480 // keyFormat: to change audio format, value is an int in AudioSystem::audio_format 481 // keyChannels: to change audio channel configuration, value is an int in AudioSystem::audio_channels 482 // keyFrameCount: to change audio output frame count, value is an int 483 static const char *keyRouting; 484 static const char *keySamplingRate; 485 static const char *keyFormat; 486 static const char *keyChannels; 487 static const char *keyFrameCount; 488 489 String8 toString(); 490 491 status_t add(const String8& key, const String8& value); 492 status_t addInt(const String8& key, const int value); 493 status_t addFloat(const String8& key, const float value); 494 495 status_t remove(const String8& key); 496 497 status_t get(const String8& key, String8& value); 498 status_t getInt(const String8& key, int& value); 499 status_t getFloat(const String8& key, float& value); 500 status_t getAt(size_t index, String8& key, String8& value); 501 502 size_t size() { return mParameters.size(); } 503 504private: 505 String8 mKeyValuePairs; 506 KeyedVector <String8, String8> mParameters; 507}; 508 509}; // namespace android 510 511#endif /*ANDROID_AUDIOSYSTEM_H_*/ 512