AudioSystem.h revision 93c3d41bdb15e39dac0faea9c5b60f1637cd477c
15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/* 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Copyright (C) 2008 The Android Open Source Project 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Licensed under the Apache License, Version 2.0 (the "License"); 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * you may not use this file except in compliance with the License. 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * You may obtain a copy of the License at 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * http://www.apache.org/licenses/LICENSE-2.0 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Unless required by applicable law or agreed to in writing, software 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * distributed under the License is distributed on an "AS IS" BASIS, 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 139ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch * See the License for the specific language governing permissions and 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * limitations under the License. 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifndef ANDROID_AUDIOSYSTEM_H_ 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define ANDROID_AUDIOSYSTEM_H_ 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <hardware/audio_effect.h> 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <media/IAudioFlingerClient.h> 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <media/IAudioPolicyServiceClient.h> 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <system/audio.h> 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <system/audio_policy.h> 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <utils/Errors.h> 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <utils/Mutex.h> 27c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace android { 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)typedef void (*audio_error_callback)(status_t err); 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class IAudioFlinger; 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class IAudioPolicyService; 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class String8; 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class AudioSystem 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles){ 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)public: 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /* These are static methods to control the system-wide AudioFlinger 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * only privileged processes can have access to them 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // mute/unmute microphone 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static status_t muteMicrophone(bool state); 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static status_t isMicrophoneMuted(bool *state); 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // set/get master volume 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static status_t setMasterVolume(float value); 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static status_t getMasterVolume(float* volume); 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // mute/unmute audio outputs 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static status_t setMasterMute(bool mute); 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static status_t getMasterMute(bool* mute); 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // set/get stream volume on specified output 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static status_t setStreamVolume(audio_stream_type_t stream, float value, 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) audio_io_handle_t output); 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static status_t getStreamVolume(audio_stream_type_t stream, float* volume, 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) audio_io_handle_t output); 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // mute/unmute stream 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static status_t setStreamMute(audio_stream_type_t stream, bool mute); 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static status_t getStreamMute(audio_stream_type_t stream, bool* mute); 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // set audio mode in audio hardware 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static status_t setMode(audio_mode_t mode); 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // returns true in *state if tracks are active on the specified stream or have been active 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // in the past inPastMs milliseconds 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static status_t isStreamActive(audio_stream_type_t stream, bool *state, uint32_t inPastMs); 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // returns true in *state if tracks are active for what qualifies as remote playback 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // on the specified stream or have been active in the past inPastMs milliseconds. Remote 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // playback isn't mutually exclusive with local playback. 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static status_t isStreamActiveRemotely(audio_stream_type_t stream, bool *state, 765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) uint32_t inPastMs); 775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // returns true in *state if a recorder is currently recording with the specified source 785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static status_t isSourceActive(audio_source_t source, bool *state); 795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // set/get audio hardware parameters. The function accepts a list of parameters 815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // key value pairs in the form: key1=value1;key2=value2;... 825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Some keys are reserved for standard parameters (See AudioParameter class). 835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // The versions with audio_io_handle_t are intended for internal media framework use only. 845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static status_t setParameters(audio_io_handle_t ioHandle, const String8& keyValuePairs); 855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static String8 getParameters(audio_io_handle_t ioHandle, const String8& keys); 865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // The versions without audio_io_handle_t are intended for JNI. 875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static status_t setParameters(const String8& keyValuePairs); 885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static String8 getParameters(const String8& keys); 895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static void setErrorCallback(audio_error_callback cb); 915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // helper function to obtain AudioFlinger service handle 935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static const sp<IAudioFlinger>& get_audio_flinger(); 945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static float linearToLog(int volume); 965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static int logToLinear(float volume); 975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Returned samplingRate and frameCount output values are guaranteed 995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // to be non-zero if status == NO_ERROR 1005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static status_t getOutputSamplingRate(uint32_t* samplingRate, 1015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) audio_stream_type_t stream); 1025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static status_t getOutputSamplingRateForAttr(uint32_t* samplingRate, 1035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const audio_attributes_t *attr); 1045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static status_t getOutputFrameCount(size_t* frameCount, 1055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) audio_stream_type_t stream); 1065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static status_t getOutputLatency(uint32_t* latency, 1075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) audio_stream_type_t stream); 1085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static status_t getSamplingRate(audio_io_handle_t output, 1095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) uint32_t* samplingRate); 1105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // returns the number of frames per audio HAL write buffer. Corresponds to 1115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // audio_stream->get_buffer_size()/audio_stream_out_frame_size() 1125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static status_t getFrameCount(audio_io_handle_t output, 1135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) size_t* frameCount); 1145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // returns the audio output stream latency in ms. Corresponds to 1155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // audio_stream_out->get_latency() 1165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static status_t getLatency(audio_io_handle_t output, 1175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) uint32_t* latency); 1185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static bool routedToA2dpOutput(audio_stream_type_t streamType); 1205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // return status NO_ERROR implies *buffSize > 0 1225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static status_t getInputBufferSize(uint32_t sampleRate, audio_format_t format, 1235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) audio_channel_mask_t channelMask, size_t* buffSize); 1245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static status_t setVoiceVolume(float volume); 1265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // return the number of audio frames written by AudioFlinger to audio HAL and 1285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // audio dsp to DAC since the specified output I/O handle has exited standby. 1295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // returned status (from utils/Errors.h) can be: 1305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // - NO_ERROR: successful operation, halFrames and dspFrames point to valid data 1315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // - INVALID_OPERATION: Not supported on current hardware platform 1325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // - BAD_VALUE: invalid parameter 1335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // NOTE: this feature is not supported on all hardware platforms and it is 1345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // necessary to check returned status before using the returned values. 1355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static status_t getRenderPosition(audio_io_handle_t output, 1365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) uint32_t *halFrames, 1375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) uint32_t *dspFrames); 1385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // return the number of input frames lost by HAL implementation, or 0 if the handle is invalid 1405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static uint32_t getInputFramesLost(audio_io_handle_t ioHandle); 1415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Allocate a new unique ID for use as an audio session ID or I/O handle. 1435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // If unable to contact AudioFlinger, returns AUDIO_UNIQUE_ID_ALLOCATE instead. 1445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // FIXME If AudioFlinger were to ever exhaust the unique ID namespace, 1455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // this method could fail by returning either AUDIO_UNIQUE_ID_ALLOCATE 1465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // or an unspecified existing unique ID. 1475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static audio_unique_id_t newAudioUniqueId(); 1485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static void acquireAudioSessionId(int audioSession, pid_t pid); 1505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static void releaseAudioSessionId(int audioSession, pid_t pid); 1515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Get the HW synchronization source used for an audio session. 1535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Return a valid source or AUDIO_HW_SYNC_INVALID if an error occurs 1545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // or no HW sync source is used. 1555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static audio_hw_sync_t getAudioHwSyncForSession(audio_session_t sessionId); 1565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // types of io configuration change events received with ioConfigChanged() 1585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) enum io_config_event { 1595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) OUTPUT_OPENED, 1605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) OUTPUT_CLOSED, 1615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) OUTPUT_CONFIG_CHANGED, 1625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) INPUT_OPENED, 1635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) INPUT_CLOSED, 164 INPUT_CONFIG_CHANGED, 165 STREAM_CONFIG_CHANGED, 166 NUM_CONFIG_EVENTS 167 }; 168 169 // audio output descriptor used to cache output configurations in client process to avoid 170 // frequent calls through IAudioFlinger 171 class OutputDescriptor { 172 public: 173 OutputDescriptor() 174 : samplingRate(0), format(AUDIO_FORMAT_DEFAULT), channelMask(0), frameCount(0), latency(0) 175 {} 176 177 uint32_t samplingRate; 178 audio_format_t format; 179 audio_channel_mask_t channelMask; 180 size_t frameCount; 181 uint32_t latency; 182 }; 183 184 // Events used to synchronize actions between audio sessions. 185 // For instance SYNC_EVENT_PRESENTATION_COMPLETE can be used to delay recording start until 186 // playback is complete on another audio session. 187 // See definitions in MediaSyncEvent.java 188 enum sync_event_t { 189 SYNC_EVENT_SAME = -1, // used internally to indicate restart with same event 190 SYNC_EVENT_NONE = 0, 191 SYNC_EVENT_PRESENTATION_COMPLETE, 192 193 // 194 // Define new events here: SYNC_EVENT_START, SYNC_EVENT_STOP, SYNC_EVENT_TIME ... 195 // 196 SYNC_EVENT_CNT, 197 }; 198 199 // Timeout for synchronous record start. Prevents from blocking the record thread forever 200 // if the trigger event is not fired. 201 static const uint32_t kSyncRecordStartTimeOutMs = 30000; 202 203 // 204 // IAudioPolicyService interface (see AudioPolicyInterface for method descriptions) 205 // 206 static status_t setDeviceConnectionState(audio_devices_t device, audio_policy_dev_state_t state, 207 const char *device_address); 208 static audio_policy_dev_state_t getDeviceConnectionState(audio_devices_t device, 209 const char *device_address); 210 static status_t setPhoneState(audio_mode_t state); 211 static status_t setForceUse(audio_policy_force_use_t usage, audio_policy_forced_cfg_t config); 212 static audio_policy_forced_cfg_t getForceUse(audio_policy_force_use_t usage); 213 214 // Client must successfully hand off the handle reference to AudioFlinger via createTrack(), 215 // or release it with releaseOutput(). 216 static audio_io_handle_t getOutput(audio_stream_type_t stream, 217 uint32_t samplingRate = 0, 218 audio_format_t format = AUDIO_FORMAT_DEFAULT, 219 audio_channel_mask_t channelMask = AUDIO_CHANNEL_OUT_STEREO, 220 audio_output_flags_t flags = AUDIO_OUTPUT_FLAG_NONE, 221 const audio_offload_info_t *offloadInfo = NULL); 222 static audio_io_handle_t getOutputForAttr(const audio_attributes_t *attr, 223 uint32_t samplingRate = 0, 224 audio_format_t format = AUDIO_FORMAT_DEFAULT, 225 audio_channel_mask_t channelMask = AUDIO_CHANNEL_OUT_STEREO, 226 audio_output_flags_t flags = AUDIO_OUTPUT_FLAG_NONE, 227 const audio_offload_info_t *offloadInfo = NULL); 228 static status_t startOutput(audio_io_handle_t output, 229 audio_stream_type_t stream, 230 int session); 231 static status_t stopOutput(audio_io_handle_t output, 232 audio_stream_type_t stream, 233 int session); 234 static void releaseOutput(audio_io_handle_t output); 235 236 // Client must successfully hand off the handle reference to AudioFlinger via openRecord(), 237 // or release it with releaseInput(). 238 static audio_io_handle_t getInput(audio_source_t inputSource, 239 uint32_t samplingRate, 240 audio_format_t format, 241 audio_channel_mask_t channelMask, 242 int sessionId, 243 audio_input_flags_t); 244 245 static status_t startInput(audio_io_handle_t input, 246 audio_session_t session); 247 static status_t stopInput(audio_io_handle_t input, 248 audio_session_t session); 249 static void releaseInput(audio_io_handle_t input, 250 audio_session_t session); 251 static status_t initStreamVolume(audio_stream_type_t stream, 252 int indexMin, 253 int indexMax); 254 static status_t setStreamVolumeIndex(audio_stream_type_t stream, 255 int index, 256 audio_devices_t device); 257 static status_t getStreamVolumeIndex(audio_stream_type_t stream, 258 int *index, 259 audio_devices_t device); 260 261 static uint32_t getStrategyForStream(audio_stream_type_t stream); 262 static audio_devices_t getDevicesForStream(audio_stream_type_t stream); 263 264 static audio_io_handle_t getOutputForEffect(const effect_descriptor_t *desc); 265 static status_t registerEffect(const effect_descriptor_t *desc, 266 audio_io_handle_t io, 267 uint32_t strategy, 268 int session, 269 int id); 270 static status_t unregisterEffect(int id); 271 static status_t setEffectEnabled(int id, bool enabled); 272 273 // clear stream to output mapping cache (gStreamOutputMap) 274 // and output configuration cache (gOutputs) 275 static void clearAudioConfigCache(); 276 277 static const sp<IAudioPolicyService>& get_audio_policy_service(); 278 279 // helpers for android.media.AudioManager.getProperty(), see description there for meaning 280 static uint32_t getPrimaryOutputSamplingRate(); 281 static size_t getPrimaryOutputFrameCount(); 282 283 static status_t setLowRamDevice(bool isLowRamDevice); 284 285 // Check if hw offload is possible for given format, stream type, sample rate, 286 // bit rate, duration, video and streaming or offload property is enabled 287 static bool isOffloadSupported(const audio_offload_info_t& info); 288 289 // check presence of audio flinger service. 290 // returns NO_ERROR if binding to service succeeds, DEAD_OBJECT otherwise 291 static status_t checkAudioFlinger(); 292 293 /* List available audio ports and their attributes */ 294 static status_t listAudioPorts(audio_port_role_t role, 295 audio_port_type_t type, 296 unsigned int *num_ports, 297 struct audio_port *ports, 298 unsigned int *generation); 299 300 /* Get attributes for a given audio port */ 301 static status_t getAudioPort(struct audio_port *port); 302 303 /* Create an audio patch between several source and sink ports */ 304 static status_t createAudioPatch(const struct audio_patch *patch, 305 audio_patch_handle_t *handle); 306 307 /* Release an audio patch */ 308 static status_t releaseAudioPatch(audio_patch_handle_t handle); 309 310 /* List existing audio patches */ 311 static status_t listAudioPatches(unsigned int *num_patches, 312 struct audio_patch *patches, 313 unsigned int *generation); 314 /* Set audio port configuration */ 315 static status_t setAudioPortConfig(const struct audio_port_config *config); 316 317 318 static status_t acquireSoundTriggerSession(audio_session_t *session, 319 audio_io_handle_t *ioHandle, 320 audio_devices_t *device); 321 static status_t releaseSoundTriggerSession(audio_session_t session); 322 323 // ---------------------------------------------------------------------------- 324 325 class AudioPortCallback : public RefBase 326 { 327 public: 328 329 AudioPortCallback() {} 330 virtual ~AudioPortCallback() {} 331 332 virtual void onAudioPortListUpdate() = 0; 333 virtual void onAudioPatchListUpdate() = 0; 334 virtual void onServiceDied() = 0; 335 336 }; 337 338 static void setAudioPortCallback(sp<AudioPortCallback> callBack); 339 340private: 341 342 class AudioFlingerClient: public IBinder::DeathRecipient, public BnAudioFlingerClient 343 { 344 public: 345 AudioFlingerClient() { 346 } 347 348 // DeathRecipient 349 virtual void binderDied(const wp<IBinder>& who); 350 351 // IAudioFlingerClient 352 353 // indicate a change in the configuration of an output or input: keeps the cached 354 // values for output/input parameters up-to-date in client process 355 virtual void ioConfigChanged(int event, audio_io_handle_t ioHandle, const void *param2); 356 }; 357 358 class AudioPolicyServiceClient: public IBinder::DeathRecipient, 359 public BnAudioPolicyServiceClient 360 { 361 public: 362 AudioPolicyServiceClient() { 363 } 364 365 // DeathRecipient 366 virtual void binderDied(const wp<IBinder>& who); 367 368 // IAudioPolicyServiceClient 369 virtual void onAudioPortListUpdate(); 370 virtual void onAudioPatchListUpdate(); 371 }; 372 373 static sp<AudioFlingerClient> gAudioFlingerClient; 374 static sp<AudioPolicyServiceClient> gAudioPolicyServiceClient; 375 friend class AudioFlingerClient; 376 friend class AudioPolicyServiceClient; 377 378 static Mutex gLock; 379 static sp<IAudioFlinger> gAudioFlinger; 380 static audio_error_callback gAudioErrorCallback; 381 382 static size_t gInBuffSize; 383 // previous parameters for recording buffer size queries 384 static uint32_t gPrevInSamplingRate; 385 static audio_format_t gPrevInFormat; 386 static audio_channel_mask_t gPrevInChannelMask; 387 388 static sp<IAudioPolicyService> gAudioPolicyService; 389 390 // list of output descriptors containing cached parameters 391 // (sampling rate, framecount, channel count...) 392 static DefaultKeyedVector<audio_io_handle_t, OutputDescriptor *> gOutputs; 393 394 static sp<AudioPortCallback> gAudioPortCallback; 395}; 396 397}; // namespace android 398 399#endif /*ANDROID_AUDIOSYSTEM_H_*/ 400