1dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent/* 2dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent * Copyright (C) 2009 The Android Open Source Project 3dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent * 4dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent * Licensed under the Apache License, Version 2.0 (the "License"); 5dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent * you may not use this file except in compliance with the License. 6dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent * You may obtain a copy of the License at 7dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent * 8dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent * http://www.apache.org/licenses/LICENSE-2.0 9dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent * 10dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent * Unless required by applicable law or agreed to in writing, software 11dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent * distributed under the License is distributed on an "AS IS" BASIS, 12dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent * See the License for the specific language governing permissions and 14dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent * limitations under the License. 15dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent */ 16dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent 17dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent#ifndef ANDROID_AUDIOPOLICYINTERFACE_H 18dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent#define ANDROID_AUDIOPOLICYINTERFACE_H 19dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent 20dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent#include <media/AudioSystem.h> 21dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent#include <media/ToneGenerator.h> 22dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent#include <utils/String8.h> 23dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent 24e81531e91ecae92aff471dbff9cbeb0f95ff4a80Dima Zavin#include <hardware_legacy/AudioSystemLegacy.h> 256fd6f41c1167953043ade42447e9a146ac262accGlenn Kasten#include <hardware/audio_policy.h> 26dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent 27e81531e91ecae92aff471dbff9cbeb0f95ff4a80Dima Zavinnamespace android_audio_legacy { 28e81531e91ecae92aff471dbff9cbeb0f95ff4a80Dima Zavin using android::Vector; 29e81531e91ecae92aff471dbff9cbeb0f95ff4a80Dima Zavin using android::String8; 30e81531e91ecae92aff471dbff9cbeb0f95ff4a80Dima Zavin using android::ToneGenerator; 31dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent 32dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent// ---------------------------------------------------------------------------- 33dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent 34dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent// The AudioPolicyInterface and AudioPolicyClientInterface classes define the communication interfaces 35dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent// between the platform specific audio policy manager and Android generic audio policy manager. 36dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent// The platform specific audio policy manager must implement methods of the AudioPolicyInterface class. 37dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent// This implementation makes use of the AudioPolicyClientInterface to control the activity and 38dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent// configuration of audio input and output streams. 39dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent// 40dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent// The platform specific audio policy manager is in charge of the audio routing and volume control 41dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent// policies for a given platform. 42dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent// The main roles of this module are: 43dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent// - keep track of current system state (removable device connections, phone state, user requests...). 44dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent// System state changes and user actions are notified to audio policy manager with methods of the AudioPolicyInterface. 45dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent// - process getOutput() queries received when AudioTrack objects are created: Those queries 46dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent// return a handler on an output that has been selected, configured and opened by the audio policy manager and that 47dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent// must be used by the AudioTrack when registering to the AudioFlinger with the createTrack() method. 48dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent// When the AudioTrack object is released, a putOutput() query is received and the audio policy manager can decide 49dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent// to close or reconfigure the output depending on other streams using this output and current system state. 50dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent// - similarly process getInput() and putInput() queries received from AudioRecord objects and configure audio inputs. 51dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent// - process volume control requests: the stream volume is converted from an index value (received from UI) to a float value 52dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent// applicable to each output as a function of platform specific settings and current output route (destination device). It 53dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent// also make sure that streams are not muted if not allowed (e.g. camera shutter sound in some countries). 54dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent// 55dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent// The platform specific audio policy manager is provided as a shared library by platform vendors (as for libaudio.so) 56dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent// and is linked with libaudioflinger.so 57dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent 58dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent 59dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent// Audio Policy Manager Interface 60dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurentclass AudioPolicyInterface 61dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent{ 62dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent 63dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurentpublic: 64dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent virtual ~AudioPolicyInterface() {} 65dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // 66dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // configuration functions 67dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // 68dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent 69dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // indicate a change in device connection status 70c8101f5b14e745b348592c5609e55f121a11a6bfJean-Michel Trivi virtual status_t setDeviceConnectionState(audio_devices_t device, 71dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent AudioSystem::device_connection_state state, 72dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent const char *device_address) = 0; 73902ec630b6abc9bf6c247e21ff4a829c58a93ce9Glenn Kasten // retrieve a device connection status 74c8101f5b14e745b348592c5609e55f121a11a6bfJean-Michel Trivi virtual AudioSystem::device_connection_state getDeviceConnectionState(audio_devices_t device, 75dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent const char *device_address) = 0; 76dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // indicate a change in phone state. Valid phones states are defined by AudioSystem::audio_mode 77dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent virtual void setPhoneState(int state) = 0; 78dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // force using a specific device category for the specified usage 79dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent virtual void setForceUse(AudioSystem::force_use usage, AudioSystem::forced_config config) = 0; 80902ec630b6abc9bf6c247e21ff4a829c58a93ce9Glenn Kasten // retrieve current device category forced for a given usage 81dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent virtual AudioSystem::forced_config getForceUse(AudioSystem::force_use usage) = 0; 82dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // set a system property (e.g. camera sound always audible) 83dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent virtual void setSystemProperty(const char* property, const char* value) = 0; 8461f357948648ff45d35ec79725db4e1b12c268dcEric Laurent // check proper initialization 8561f357948648ff45d35ec79725db4e1b12c268dcEric Laurent virtual status_t initCheck() = 0; 86dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent 87dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // 88dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // Audio routing query functions 89dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // 90dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent 91902ec630b6abc9bf6c247e21ff4a829c58a93ce9Glenn Kasten // request an output appropriate for playback of the supplied stream type and parameters 92dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent virtual audio_io_handle_t getOutput(AudioSystem::stream_type stream, 935082dbeb19e37883230510129c94336063a4f91cGlenn Kasten uint32_t samplingRate, 945082dbeb19e37883230510129c94336063a4f91cGlenn Kasten audio_format_t format, 952c3d2379ee6eadb32b63bf6de538cfd6487e8e20Glenn Kasten audio_channel_mask_t channelMask, 965082dbeb19e37883230510129c94336063a4f91cGlenn Kasten AudioSystem::output_flags flags, 975082dbeb19e37883230510129c94336063a4f91cGlenn Kasten const audio_offload_info_t *offloadInfo) = 0; 98dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // indicates to the audio policy manager that the output starts being used by corresponding stream. 99d2b227e76033d8c44b71d2982028a63436d3fe84Eric Laurent virtual status_t startOutput(audio_io_handle_t output, 100d2b227e76033d8c44b71d2982028a63436d3fe84Eric Laurent AudioSystem::stream_type stream, 1016a36ec43e62e07921da08456d2b309edabb03a0cGlenn Kasten audio_session_t session = AUDIO_SESSION_NONE) = 0; 102dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // indicates to the audio policy manager that the output stops being used by corresponding stream. 103d2b227e76033d8c44b71d2982028a63436d3fe84Eric Laurent virtual status_t stopOutput(audio_io_handle_t output, 104d2b227e76033d8c44b71d2982028a63436d3fe84Eric Laurent AudioSystem::stream_type stream, 1056a36ec43e62e07921da08456d2b309edabb03a0cGlenn Kasten audio_session_t session = AUDIO_SESSION_NONE) = 0; 106dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // releases the output. 107dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent virtual void releaseOutput(audio_io_handle_t output) = 0; 108dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent 109902ec630b6abc9bf6c247e21ff4a829c58a93ce9Glenn Kasten // request an input appropriate for record from the supplied device with supplied parameters. 110dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent virtual audio_io_handle_t getInput(int inputSource, 1115082dbeb19e37883230510129c94336063a4f91cGlenn Kasten uint32_t samplingRate, 1125082dbeb19e37883230510129c94336063a4f91cGlenn Kasten audio_format_t format, 1132c3d2379ee6eadb32b63bf6de538cfd6487e8e20Glenn Kasten audio_channel_mask_t channelMask, 1145082dbeb19e37883230510129c94336063a4f91cGlenn Kasten AudioSystem::audio_in_acoustics acoustics) = 0; 115dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // indicates to the audio policy manager that the input starts being used. 116dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent virtual status_t startInput(audio_io_handle_t input) = 0; 117dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // indicates to the audio policy manager that the input stops being used. 118dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent virtual status_t stopInput(audio_io_handle_t input) = 0; 119dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // releases the input. 120dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent virtual void releaseInput(audio_io_handle_t input) = 0; 121dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent 122dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // 123dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // volume control functions 124dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // 125dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent 126dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // initialises stream volume conversion parameters by specifying volume index range. 127dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent virtual void initStreamVolume(AudioSystem::stream_type stream, 128dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent int indexMin, 129dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent int indexMax) = 0; 130dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent 131c6f331b3f48455c9a9cdf00fc82894badd0a7da6Eric Laurent // sets the new stream volume at a level corresponding to the supplied index for the 132c6f331b3f48455c9a9cdf00fc82894badd0a7da6Eric Laurent // supplied device. By convention, specifying AUDIO_DEVICE_OUT_DEFAULT means 133c6f331b3f48455c9a9cdf00fc82894badd0a7da6Eric Laurent // setting volume for all devices 134c6f331b3f48455c9a9cdf00fc82894badd0a7da6Eric Laurent virtual status_t setStreamVolumeIndex(AudioSystem::stream_type stream, 135c6f331b3f48455c9a9cdf00fc82894badd0a7da6Eric Laurent int index, 136c6f331b3f48455c9a9cdf00fc82894badd0a7da6Eric Laurent audio_devices_t device) = 0; 137c6f331b3f48455c9a9cdf00fc82894badd0a7da6Eric Laurent 138c6f331b3f48455c9a9cdf00fc82894badd0a7da6Eric Laurent // retrieve current volume index for the specified stream and the 139c6f331b3f48455c9a9cdf00fc82894badd0a7da6Eric Laurent // specified device. By convention, specifying AUDIO_DEVICE_OUT_DEFAULT means 140c6f331b3f48455c9a9cdf00fc82894badd0a7da6Eric Laurent // querying the volume of the active device. 141c6f331b3f48455c9a9cdf00fc82894badd0a7da6Eric Laurent virtual status_t getStreamVolumeIndex(AudioSystem::stream_type stream, 142c6f331b3f48455c9a9cdf00fc82894badd0a7da6Eric Laurent int *index, 143c6f331b3f48455c9a9cdf00fc82894badd0a7da6Eric Laurent audio_devices_t device) = 0; 144323028bd21a3d184efdcb2b6b0896fa343c32510Eric Laurent 145d2b227e76033d8c44b71d2982028a63436d3fe84Eric Laurent // return the strategy corresponding to a given stream type 146d2b227e76033d8c44b71d2982028a63436d3fe84Eric Laurent virtual uint32_t getStrategyForStream(AudioSystem::stream_type stream) = 0; 147d2b227e76033d8c44b71d2982028a63436d3fe84Eric Laurent 148fafb18fb31cc4ab3c73585ba508f7643c9a9e3adGlenn Kasten // return the enabled output devices for the given stream type 149f9a4e2eccfbbe451512337af0806cfc54be0eaf9Eric Laurent virtual audio_devices_t getDevicesForStream(AudioSystem::stream_type stream) = 0; 150fafb18fb31cc4ab3c73585ba508f7643c9a9e3adGlenn Kasten 151d2b227e76033d8c44b71d2982028a63436d3fe84Eric Laurent // Audio effect management 152c94dccc97cc3ed5171b45f46a0f7f8762d37156fGlenn Kasten virtual audio_io_handle_t getOutputForEffect(const effect_descriptor_t *desc) = 0; 153c94dccc97cc3ed5171b45f46a0f7f8762d37156fGlenn Kasten virtual status_t registerEffect(const effect_descriptor_t *desc, 1541c65a49da0c89f75e528354ef02de5dc93a28232Eric Laurent audio_io_handle_t io, 155d2b227e76033d8c44b71d2982028a63436d3fe84Eric Laurent uint32_t strategy, 1566a36ec43e62e07921da08456d2b309edabb03a0cGlenn Kasten audio_session_t session, 157d2b227e76033d8c44b71d2982028a63436d3fe84Eric Laurent int id) = 0; 158d2b227e76033d8c44b71d2982028a63436d3fe84Eric Laurent virtual status_t unregisterEffect(int id) = 0; 159b7ee39305b9b651dff8c2e5737feb5f9ae1136c9Olivier Bailly virtual status_t setEffectEnabled(int id, bool enabled) = 0; 160d2b227e76033d8c44b71d2982028a63436d3fe84Eric Laurent 16136291a74cd212c4172ac054ad0eec686b7e15c96Eric Laurent virtual bool isStreamActive(int stream, uint32_t inPastMs = 0) const = 0; 162dc3bf1a37425697277f6ed04fc8cfe4a52fd678aJean-Michel Trivi virtual bool isStreamActiveRemotely(int stream, uint32_t inPastMs = 0) const = 0; 163abc55c698301e05a80d7f9394c75abca0b307602Jean-Michel Trivi virtual bool isSourceActive(audio_source_t source) const = 0; 16436291a74cd212c4172ac054ad0eec686b7e15c96Eric Laurent 165323028bd21a3d184efdcb2b6b0896fa343c32510Eric Laurent //dump state 166323028bd21a3d184efdcb2b6b0896fa343c32510Eric Laurent virtual status_t dump(int fd) = 0; 167b4d07b97d23cfaffe22c7859ad7c45e168a7df0eRichard Fitzgerald 168b4d07b97d23cfaffe22c7859ad7c45e168a7df0eRichard Fitzgerald virtual bool isOffloadSupported(const audio_offload_info_t& offloadInfo) = 0; 169dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent}; 170dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent 171dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent 172dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent// Audio Policy client Interface 173dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurentclass AudioPolicyClientInterface 174dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent{ 175dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurentpublic: 176dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent virtual ~AudioPolicyClientInterface() {} 177dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent 178dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // 17970c236c9290732782d5267935af1475b8d5ae602Eric Laurent // Audio HW module functions 18070c236c9290732782d5267935af1475b8d5ae602Eric Laurent // 18170c236c9290732782d5267935af1475b8d5ae602Eric Laurent 18270c236c9290732782d5267935af1475b8d5ae602Eric Laurent // loads a HW module. 18370c236c9290732782d5267935af1475b8d5ae602Eric Laurent virtual audio_module_handle_t loadHwModule(const char *name) = 0; 18470c236c9290732782d5267935af1475b8d5ae602Eric Laurent 18570c236c9290732782d5267935af1475b8d5ae602Eric Laurent // 186dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // Audio output Control functions 187dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // 188dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent 189dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // opens an audio output with the requested parameters. The parameter values can indicate to use the default values 190dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // in case the audio policy manager has no specific requirements for the output being opened. 191dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // When the function returns, the parameter values reflect the actual values used by the audio hardware output stream. 192dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // The audio policy manager can check if the proposed parameters are suitable or not and act accordingly. 19370c236c9290732782d5267935af1475b8d5ae602Eric Laurent virtual audio_io_handle_t openOutput(audio_module_handle_t module, 19470c236c9290732782d5267935af1475b8d5ae602Eric Laurent audio_devices_t *pDevices, 19570c236c9290732782d5267935af1475b8d5ae602Eric Laurent uint32_t *pSamplingRate, 19670c236c9290732782d5267935af1475b8d5ae602Eric Laurent audio_format_t *pFormat, 19770c236c9290732782d5267935af1475b8d5ae602Eric Laurent audio_channel_mask_t *pChannelMask, 19870c236c9290732782d5267935af1475b8d5ae602Eric Laurent uint32_t *pLatencyMs, 199b4d07b97d23cfaffe22c7859ad7c45e168a7df0eRichard Fitzgerald audio_output_flags_t flags, 200b4d07b97d23cfaffe22c7859ad7c45e168a7df0eRichard Fitzgerald const audio_offload_info_t *offloadInfo = NULL) = 0; 201dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // creates a special output that is duplicated to the two outputs passed as arguments. The duplication is performed by 202dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // a special mixer thread in the AudioFlinger. 203dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent virtual audio_io_handle_t openDuplicateOutput(audio_io_handle_t output1, audio_io_handle_t output2) = 0; 204dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // closes the output stream 205dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent virtual status_t closeOutput(audio_io_handle_t output) = 0; 206dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // suspends the output. When an output is suspended, the corresponding audio hardware output stream is placed in 207dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // standby and the AudioTracks attached to the mixer thread are still processed but the output mix is discarded. 208dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent virtual status_t suspendOutput(audio_io_handle_t output) = 0; 209dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // restores a suspended output. 210dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent virtual status_t restoreOutput(audio_io_handle_t output) = 0; 211dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent 212dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // 213dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // Audio input Control functions 214dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // 215dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent 216dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // opens an audio input 21770c236c9290732782d5267935af1475b8d5ae602Eric Laurent virtual audio_io_handle_t openInput(audio_module_handle_t module, 21870c236c9290732782d5267935af1475b8d5ae602Eric Laurent audio_devices_t *pDevices, 21970c236c9290732782d5267935af1475b8d5ae602Eric Laurent uint32_t *pSamplingRate, 22070c236c9290732782d5267935af1475b8d5ae602Eric Laurent audio_format_t *pFormat, 22170c236c9290732782d5267935af1475b8d5ae602Eric Laurent audio_channel_mask_t *pChannelMask) = 0; 222dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // closes an audio input 223dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent virtual status_t closeInput(audio_io_handle_t input) = 0; 224dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // 225dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // misc control functions 226dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // 227dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent 228dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // set a stream volume for a particular output. For the same user setting, a given stream type can have different volumes 229dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // for each output (destination device) it is attached to. 230721365e3e7902598b94f177b1c96afc688a70c0aEric Laurent virtual status_t setStreamVolume(AudioSystem::stream_type stream, float volume, audio_io_handle_t output, int delayMs = 0) = 0; 231dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent 232316222fcd60a429e53aa6205278697bb2df8ef32Glenn Kasten // invalidate a stream type, causing a reroute to an unspecified new output 233316222fcd60a429e53aa6205278697bb2df8ef32Glenn Kasten virtual status_t invalidateStream(AudioSystem::stream_type stream) = 0; 234dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent 235dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // function enabling to send proprietary informations directly from audio policy manager to audio hardware interface. 236721365e3e7902598b94f177b1c96afc688a70c0aEric Laurent virtual void setParameters(audio_io_handle_t ioHandle, const String8& keyValuePairs, int delayMs = 0) = 0; 237dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // function enabling to receive proprietary informations directly from audio hardware interface to audio policy manager. 238dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent virtual String8 getParameters(audio_io_handle_t ioHandle, const String8& keys) = 0; 239dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent 240dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // request the playback of a tone on the specified stream: used for instance to replace notification sounds when playing 241dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent // over a telephony device during a phone call. 242dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent virtual status_t startTone(ToneGenerator::tone_type tone, AudioSystem::stream_type stream) = 0; 243dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent virtual status_t stopTone() = 0; 244f163f3d600c056de0bdca6d12555a0225f76ec9aEric Laurent 245f163f3d600c056de0bdca6d12555a0225f76ec9aEric Laurent // set down link audio volume. 246f163f3d600c056de0bdca6d12555a0225f76ec9aEric Laurent virtual status_t setVoiceVolume(float volume, int delayMs = 0) = 0; 247d2b227e76033d8c44b71d2982028a63436d3fe84Eric Laurent 248d2b227e76033d8c44b71d2982028a63436d3fe84Eric Laurent // move effect to the specified output 2496a36ec43e62e07921da08456d2b309edabb03a0cGlenn Kasten virtual status_t moveEffects(audio_session_t session, 250d2b227e76033d8c44b71d2982028a63436d3fe84Eric Laurent audio_io_handle_t srcOutput, 251d2b227e76033d8c44b71d2982028a63436d3fe84Eric Laurent audio_io_handle_t dstOutput) = 0; 252d2b227e76033d8c44b71d2982028a63436d3fe84Eric Laurent 253dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent}; 254dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent 255dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurentextern "C" AudioPolicyInterface* createAudioPolicyManager(AudioPolicyClientInterface *clientInterface); 256dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurentextern "C" void destroyAudioPolicyManager(AudioPolicyInterface *interface); 257dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent 258dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent 259dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent}; // namespace android 260dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent 261dbfad0ce83535cea0940e04660bdfab5b6c867a4Eric Laurent#endif // ANDROID_AUDIOPOLICYINTERFACE_H 262