199 lines
8.2 KiB
C
199 lines
8.2 KiB
C
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/*
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* Copyright (C) 2009 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ANDROID_AUDIOPOLICYSERVICE_H
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#define ANDROID_AUDIOPOLICYSERVICE_H
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#include <media/IAudioPolicyService.h>
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#include <hardware_legacy/AudioPolicyInterface.h>
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#include <media/ToneGenerator.h>
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namespace android {
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class String8;
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// ----------------------------------------------------------------------------
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class AudioPolicyService: public BnAudioPolicyService, public AudioPolicyClientInterface, public IBinder::DeathRecipient
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{
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public:
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static void instantiate();
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virtual status_t dump(int fd, const Vector<String16>& args);
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//
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// BnAudioPolicyService (see AudioPolicyInterface for method descriptions)
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//
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virtual status_t setDeviceConnectionState(AudioSystem::audio_devices device,
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AudioSystem::device_connection_state state,
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const char *device_address);
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virtual AudioSystem::device_connection_state getDeviceConnectionState(AudioSystem::audio_devices device,
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const char *device_address);
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virtual status_t setPhoneState(int state);
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virtual status_t setRingerMode(uint32_t mode, uint32_t mask);
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virtual status_t setForceUse(AudioSystem::force_use usage, AudioSystem::forced_config config);
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virtual AudioSystem::forced_config getForceUse(AudioSystem::force_use usage);
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virtual audio_io_handle_t getOutput(AudioSystem::stream_type stream,
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uint32_t samplingRate = 0,
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uint32_t format = AudioSystem::FORMAT_DEFAULT,
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uint32_t channels = 0,
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AudioSystem::output_flags flags = AudioSystem::OUTPUT_FLAG_INDIRECT);
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virtual status_t startOutput(audio_io_handle_t output, AudioSystem::stream_type stream);
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virtual status_t stopOutput(audio_io_handle_t output, AudioSystem::stream_type stream);
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virtual void releaseOutput(audio_io_handle_t output);
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virtual audio_io_handle_t getInput(int inputSource,
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uint32_t samplingRate = 0,
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uint32_t format = AudioSystem::FORMAT_DEFAULT,
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uint32_t channels = 0,
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AudioSystem::audio_in_acoustics acoustics = (AudioSystem::audio_in_acoustics)0);
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virtual status_t startInput(audio_io_handle_t input);
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virtual status_t stopInput(audio_io_handle_t input);
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virtual void releaseInput(audio_io_handle_t input);
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virtual status_t initStreamVolume(AudioSystem::stream_type stream,
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int indexMin,
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int indexMax);
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virtual status_t setStreamVolumeIndex(AudioSystem::stream_type stream, int index);
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virtual status_t getStreamVolumeIndex(AudioSystem::stream_type stream, int *index);
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virtual status_t onTransact(
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uint32_t code,
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const Parcel& data,
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Parcel* reply,
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uint32_t flags);
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// IBinder::DeathRecipient
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virtual void binderDied(const wp<IBinder>& who);
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//
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// AudioPolicyClientInterface
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//
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virtual audio_io_handle_t openOutput(uint32_t *pDevices,
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uint32_t *pSamplingRate,
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uint32_t *pFormat,
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uint32_t *pChannels,
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uint32_t *pLatencyMs,
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AudioSystem::output_flags flags);
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virtual audio_io_handle_t openDuplicateOutput(audio_io_handle_t output1, audio_io_handle_t output2);
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virtual status_t closeOutput(audio_io_handle_t output);
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virtual status_t suspendOutput(audio_io_handle_t output);
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virtual status_t restoreOutput(audio_io_handle_t output);
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virtual audio_io_handle_t openInput(uint32_t *pDevices,
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uint32_t *pSamplingRate,
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uint32_t *pFormat,
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uint32_t *pChannels,
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uint32_t acoustics);
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virtual status_t closeInput(audio_io_handle_t input);
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virtual status_t setStreamVolume(AudioSystem::stream_type stream, float volume, audio_io_handle_t output);
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virtual status_t setStreamOutput(AudioSystem::stream_type stream, audio_io_handle_t output);
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virtual void setParameters(audio_io_handle_t ioHandle, const String8& keyValuePairs);
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virtual String8 getParameters(audio_io_handle_t ioHandle, const String8& keys);
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virtual status_t startTone(ToneGenerator::tone_type tone, AudioSystem::stream_type stream);
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virtual status_t stopTone();
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private:
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AudioPolicyService();
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virtual ~AudioPolicyService();
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// Thread used for tone playback and to send audio config commands to audio flinger
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// For tone playback, using a separate thread is necessary to avoid deadlock with mLock because startTone()
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// and stopTone() are normally called with mLock locked and requesting a tone start or stop will cause
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// calls to AudioPolicyService and an attempt to lock mLock.
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// For audio config commands, it is necessary because audio flinger requires that the calling process (user)
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// has permission to modify audio settings.
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class AudioCommandThread : public Thread {
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public:
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// commands for tone AudioCommand
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enum {
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START_TONE,
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STOP_TONE,
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SET_VOLUME,
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SET_PARAMETERS
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};
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AudioCommandThread ();
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virtual ~AudioCommandThread();
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// Thread virtuals
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virtual void onFirstRef();
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virtual bool threadLoop();
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void exit();
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void startToneCommand(int type = 0, int stream = 0);
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void stopToneCommand();
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status_t volumeCommand(int stream, float volume, void *output);
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status_t parametersCommand(void *ioHandle, const String8& keyValuePairs);
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private:
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// descriptor for requested tone playback event
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class AudioCommand {
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public:
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int mCommand; // START_TONE, STOP_TONE ...
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void *mParam;
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};
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class ToneData {
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public:
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int mType; // tone type (START_TONE only)
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int mStream; // stream type (START_TONE only)
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};
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class VolumeData {
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public:
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int mStream;
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float mVolume;
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void *mIO;
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};
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class ParametersData {
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public:
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void *mIO;
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String8 mKeyValuePairs;
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};
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Mutex mLock;
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Condition mWaitWorkCV;
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Vector<AudioCommand *> mAudioCommands; // list of pending tone events
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Condition mCommandCond;
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status_t mCommandStatus;
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ToneGenerator *mpToneGenerator; // the tone generator
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};
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// Internal dump utilities.
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status_t dumpPermissionDenial(int fd, const Vector<String16>& args);
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Mutex mLock; // prevents concurrent access to AudioPolicy manager functions changing device
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// connection stated our routing
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AudioPolicyInterface* mpPolicyManager; // the platform specific policy manager
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sp <AudioCommandThread> mAudioCommandThread; // audio commands thread
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sp <AudioCommandThread> mTonePlaybacThread; // tone playback thread
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};
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}; // namespace android
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#endif // ANDROID_AUDIOPOLICYSERVICE_H
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