/* * 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 #include #include #include #include #include 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 AudioPolicyManagerALSA: public AudioPolicyInterface { public: AudioPolicyManagerALSA(AudioPolicyClientInterface *clientInterface); virtual ~AudioPolicyManagerALSA(); // 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 mOutputs; // list of output descriptors KeyedVector 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 }; };