/* * 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. */ #ifndef ANDROID_AUDIOPOLICYSERVICE_H #define ANDROID_AUDIOPOLICYSERVICE_H #include #include #include namespace android { class String8; // ---------------------------------------------------------------------------- class AudioPolicyService: public BnAudioPolicyService, public AudioPolicyClientInterface, public IBinder::DeathRecipient { public: static void instantiate(); virtual status_t dump(int fd, const Vector& args); // // BnAudioPolicyService (see AudioPolicyInterface for method descriptions) // 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 status_t setPhoneState(int state); virtual status_t setRingerMode(uint32_t mode, uint32_t mask); virtual status_t setForceUse(AudioSystem::force_use usage, AudioSystem::forced_config config); virtual AudioSystem::forced_config getForceUse(AudioSystem::force_use usage); virtual audio_io_handle_t getOutput(AudioSystem::stream_type stream, uint32_t samplingRate = 0, uint32_t format = AudioSystem::FORMAT_DEFAULT, uint32_t channels = 0, AudioSystem::output_flags flags = AudioSystem::OUTPUT_FLAG_INDIRECT); 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 = 0, uint32_t format = AudioSystem::FORMAT_DEFAULT, uint32_t channels = 0, AudioSystem::audio_in_acoustics acoustics = (AudioSystem::audio_in_acoustics)0); virtual status_t startInput(audio_io_handle_t input); virtual status_t stopInput(audio_io_handle_t input); virtual void releaseInput(audio_io_handle_t input); virtual status_t 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 onTransact( uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags); // IBinder::DeathRecipient virtual void binderDied(const wp& who); // // AudioPolicyClientInterface // virtual audio_io_handle_t openOutput(uint32_t *pDevices, uint32_t *pSamplingRate, uint32_t *pFormat, uint32_t *pChannels, uint32_t *pLatencyMs, AudioSystem::output_flags flags); virtual audio_io_handle_t openDuplicateOutput(audio_io_handle_t output1, audio_io_handle_t output2); virtual status_t closeOutput(audio_io_handle_t output); virtual status_t suspendOutput(audio_io_handle_t output); virtual status_t restoreOutput(audio_io_handle_t output); virtual audio_io_handle_t openInput(uint32_t *pDevices, uint32_t *pSamplingRate, uint32_t *pFormat, uint32_t *pChannels, uint32_t acoustics); virtual status_t closeInput(audio_io_handle_t input); virtual status_t setStreamVolume(AudioSystem::stream_type stream, float volume, audio_io_handle_t output); virtual status_t setStreamOutput(AudioSystem::stream_type stream, audio_io_handle_t output); virtual void setParameters(audio_io_handle_t ioHandle, const String8& keyValuePairs); virtual String8 getParameters(audio_io_handle_t ioHandle, const String8& keys); virtual status_t startTone(ToneGenerator::tone_type tone, AudioSystem::stream_type stream); virtual status_t stopTone(); private: AudioPolicyService(); virtual ~AudioPolicyService(); static const char *sAudioPolicyLibrary; static const char *sAudioPolicyGenericLibrary; // Thread used for tone playback and to send audio config commands to audio flinger // For tone playback, using a separate thread is necessary to avoid deadlock with mLock because startTone() // and stopTone() are normally called with mLock locked and requesting a tone start or stop will cause // calls to AudioPolicyService and an attempt to lock mLock. // For audio config commands, it is necessary because audio flinger requires that the calling process (user) // has permission to modify audio settings. class AudioCommandThread : public Thread { public: // commands for tone AudioCommand enum { START_TONE, STOP_TONE, SET_VOLUME, SET_PARAMETERS }; AudioCommandThread (); virtual ~AudioCommandThread(); // Thread virtuals virtual void onFirstRef(); virtual bool threadLoop(); void exit(); void startToneCommand(int type = 0, int stream = 0); void stopToneCommand(); status_t volumeCommand(int stream, float volume, void *output); status_t parametersCommand(void *ioHandle, const String8& keyValuePairs); private: // descriptor for requested tone playback event class AudioCommand { public: int mCommand; // START_TONE, STOP_TONE ... void *mParam; }; class ToneData { public: int mType; // tone type (START_TONE only) int mStream; // stream type (START_TONE only) }; class VolumeData { public: int mStream; float mVolume; void *mIO; }; class ParametersData { public: void *mIO; String8 mKeyValuePairs; }; Mutex mLock; Condition mWaitWorkCV; Vector mAudioCommands; // list of pending tone events Condition mCommandCond; status_t mCommandStatus; ToneGenerator *mpToneGenerator; // the tone generator }; // Internal dump utilities. status_t dumpPermissionDenial(int fd, const Vector& args); Mutex mLock; // prevents concurrent access to AudioPolicy manager functions changing device // connection stated our routing AudioPolicyInterface* mpPolicyManager; // the platform specific policy manager sp mAudioCommandThread; // audio commands thread sp mTonePlaybacThread; // tone playback thread void *mpPolicyManagerLibHandle; }; }; // namespace android #endif // ANDROID_AUDIOPOLICYSERVICE_H