| /* |
| * Copyright (C) 2009 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| |
| #include <stdint.h> |
| #include <sys/types.h> |
| #include <utils/Timers.h> |
| #include <utils/Errors.h> |
| #include <utils/KeyedVector.h> |
| #include <hardware_legacy/AudioPolicyInterface.h> |
| |
| |
| namespace android { |
| |
| // ---------------------------------------------------------------------------- |
| |
| #define MAX_DEVICE_ADDRESS_LEN 20 |
| // Attenuation applied to STRATEGY_SONIFICATION streams when a headset is connected: 6dB |
| #define SONIFICATION_HEADSET_VOLUME_FACTOR 0.5 |
| // Min volume for STRATEGY_SONIFICATION streams when limited by music volume: -36dB |
| #define SONIFICATION_HEADSET_VOLUME_MIN 0.016 |
| // Time in seconds during which we consider that music is still active after a music |
| // track was stopped - see computeVolume() |
| #define SONIFICATION_HEADSET_MUSIC_DELAY 5 |
| |
| class AudioPolicyManager: public AudioPolicyInterface |
| { |
| |
| public: |
| AudioPolicyManager(AudioPolicyClientInterface *clientInterface); |
| virtual ~AudioPolicyManager(); |
| |
| // AudioPolicyInterface |
| virtual status_t setDeviceConnectionState(AudioSystem::audio_devices device, |
| AudioSystem::device_connection_state state, |
| const char *device_address); |
| virtual AudioSystem::device_connection_state getDeviceConnectionState(AudioSystem::audio_devices device, |
| const char *device_address); |
| virtual void setPhoneState(int state); |
| virtual void setRingerMode(uint32_t mode, uint32_t mask); |
| virtual void setForceUse(AudioSystem::force_use usage, AudioSystem::forced_config config); |
| virtual AudioSystem::forced_config getForceUse(AudioSystem::force_use usage); |
| virtual void setSystemProperty(const char* property, const char* value); |
| virtual audio_io_handle_t getOutput(AudioSystem::stream_type stream, |
| uint32_t samplingRate, |
| uint32_t format, |
| uint32_t channels, |
| AudioSystem::output_flags flags); |
| virtual status_t startOutput(audio_io_handle_t output, AudioSystem::stream_type stream); |
| virtual status_t stopOutput(audio_io_handle_t output, AudioSystem::stream_type stream); |
| virtual void releaseOutput(audio_io_handle_t output); |
| virtual audio_io_handle_t getInput(int inputSource, |
| uint32_t samplingRate, |
| uint32_t format, |
| uint32_t channels, |
| AudioSystem::audio_in_acoustics acoustics); |
| // indicates to the audio policy manager that the input starts being used. |
| virtual status_t startInput(audio_io_handle_t input); |
| // indicates to the audio policy manager that the input stops being used. |
| virtual status_t stopInput(audio_io_handle_t input); |
| virtual void releaseInput(audio_io_handle_t input); |
| virtual void initStreamVolume(AudioSystem::stream_type stream, |
| int indexMin, |
| int indexMax); |
| virtual status_t setStreamVolumeIndex(AudioSystem::stream_type stream, int index); |
| virtual status_t getStreamVolumeIndex(AudioSystem::stream_type stream, int *index); |
| |
| virtual status_t dump(int fd); |
| |
| private: |
| |
| enum routing_strategy { |
| STRATEGY_MEDIA, |
| STRATEGY_PHONE, |
| STRATEGY_SONIFICATION, |
| STRATEGY_DTMF, |
| NUM_STRATEGIES |
| }; |
| |
| // descriptor for audio outputs. Used to maintain current configuration of each opened audio output |
| // and keep track of the usage of this output by each audio stream type. |
| class AudioOutputDescriptor |
| { |
| public: |
| AudioOutputDescriptor(); |
| |
| status_t dump(int fd); |
| |
| uint32_t device(); |
| void changeRefCount(AudioSystem::stream_type, int delta); |
| bool isUsedByStrategy(routing_strategy strategy); |
| bool isUsedByStream(AudioSystem::stream_type stream) { return mRefCount[stream] > 0 ? true : false; } |
| bool isDuplicated() { return (mDevice == 0); } // by convention mDevice is 0 for duplicated outputs |
| |
| uint32_t mSamplingRate; // |
| uint32_t mFormat; // |
| uint32_t mChannels; // output configuration |
| uint32_t mLatency; // |
| AudioSystem::output_flags mFlags; // |
| uint32_t mDevice; // current device this output is routed to |
| uint32_t mRefCount[AudioSystem::NUM_STREAM_TYPES]; // number of streams of each type using this output |
| AudioOutputDescriptor *mOutput1; // used by duplicated outputs: first output |
| AudioOutputDescriptor *mOutput2; // used by duplicated outputs: second output |
| float mCurVolume[AudioSystem::NUM_STREAM_TYPES]; // current stream volume |
| }; |
| |
| // descriptor for audio inputs. Used to maintain current configuration of each opened audio input |
| // and keep track of the usage of this input. |
| class AudioInputDescriptor |
| { |
| public: |
| AudioInputDescriptor(); |
| |
| status_t dump(int fd); |
| |
| uint32_t mSamplingRate; // |
| uint32_t mFormat; // input configuration |
| uint32_t mChannels; // |
| AudioSystem::audio_in_acoustics mAcoustics; // |
| uint32_t mDevice; // current device this input is routed to |
| uint32_t mRefCount; // number of AudioRecord clients using this output |
| int mInputSource; // input source selected by application (mediarecorder.h) |
| }; |
| |
| // stream descriptor used for volume control |
| class StreamDescriptor |
| { |
| public: |
| StreamDescriptor() |
| : mIndexMin(0), mIndexMax(1), mIndexCur(1), mMuteCount(0), mCanBeMuted(true) {} |
| |
| void dump(char* buffer, size_t size); |
| |
| int mIndexMin; // min volume index |
| int mIndexMax; // max volume index |
| int mIndexCur; // current volume index |
| int mMuteCount; // mute request counter |
| bool mCanBeMuted; // true is the stream can be muted |
| }; |
| |
| // return the strategy corresponding to a given stream type |
| static routing_strategy getStrategy(AudioSystem::stream_type stream); |
| // return the output handle of an output routed to the specified device, 0 if no output |
| // is routed to the device |
| audio_io_handle_t getOutputForDevice(uint32_t device); |
| // return appropriate device for streams handled by the specified strategy according to current |
| // phone state, connected devices... |
| uint32_t getDeviceForStrategy(routing_strategy strategy); |
| // change the route of the specified output |
| void setOutputDevice(audio_io_handle_t output, uint32_t device, bool force = false, int delayMs = 0); |
| // select input device corresponding to requested audio source |
| uint32_t getDeviceForInputSource(int inputSource); |
| // return io handle of active input or 0 if no input is active |
| audio_io_handle_t getActiveInput(); |
| // compute the actual volume for a given stream according to the requested index and a particular |
| // device |
| float computeVolume(int stream, int index, audio_io_handle_t output, uint32_t device); |
| // check that volume change is permitted, compute and send new volume to audio hardware |
| status_t checkAndSetVolume(int stream, int index, audio_io_handle_t output, uint32_t device, int delayMs = 0, bool force = false); |
| // apply all stream volumes to the specified output and device |
| void applyStreamVolumes(audio_io_handle_t output, uint32_t device, int delayMs = 0); |
| // Mute or unmute all streams handled by the specified strategy on the specified output |
| void setStrategyMute(routing_strategy strategy, bool on, audio_io_handle_t output, int delayMs = 0); |
| // Mute or unmute the stream on the specified output |
| void setStreamMute(int stream, bool on, audio_io_handle_t output, int delayMs = 0); |
| // handle special cases for sonification strategy while in call: mute streams or replace by |
| // a special tone in the device used for communication |
| void handleIncallSonification(int stream, bool starting, bool stateChange); |
| |
| AudioPolicyClientInterface *mpClientInterface; // audio policy client interface |
| audio_io_handle_t mHardwareOutput; // hardware output handler |
| audio_io_handle_t mA2dpOutput; // A2DP output handler |
| audio_io_handle_t mDuplicatedOutput; // duplicated output handler: outputs to hardware and A2DP. |
| |
| KeyedVector<audio_io_handle_t, AudioOutputDescriptor *> mOutputs; // list of output descriptors |
| KeyedVector<audio_io_handle_t, AudioInputDescriptor *> mInputs; // list of input descriptors |
| uint32_t mAvailableOutputDevices; // bit field of all available output devices |
| uint32_t mAvailableInputDevices; // bit field of all available input devices |
| int mPhoneState; // current phone state |
| uint32_t mRingerMode; // current ringer mode |
| AudioSystem::forced_config mForceUse[AudioSystem::NUM_FORCE_USE]; // current forced use configuration |
| |
| StreamDescriptor mStreams[AudioSystem::NUM_STREAM_TYPES]; // stream descriptors for volume control |
| String8 mA2dpDeviceAddress; // A2DP device MAC address |
| String8 mScoDeviceAddress; // SCO device MAC address |
| nsecs_t mMusicStopTime; // time when last music stream was stopped |
| }; |
| |
| }; |