/*
* 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 <media/IAudioPolicyService.h>
#include <hardware_legacy/AudioPolicyInterface.h>
#include <media/ToneGenerator.h>
#include <utils/Vector.h>
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<String16>& 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,
int session = 0);
virtual status_t stopOutput(audio_io_handle_t output,
AudioSystem::stream_type stream,
int session = 0);
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 uint32_t getStrategyForStream(AudioSystem::stream_type stream);
virtual audio_io_handle_t getOutputForEffect(effect_descriptor_t *desc);
virtual status_t registerEffect(effect_descriptor_t *desc,
audio_io_handle_t output,
uint32_t strategy,
int session,
int id);
virtual status_t unregisterEffect(int id);
virtual status_t onTransact(
uint32_t code,
const Parcel& data,
Parcel* reply,
uint32_t flags);
// IBinder::DeathRecipient
virtual void binderDied(const wp<IBinder>& 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,
int delayMs = 0);
virtual status_t setStreamOutput(AudioSystem::stream_type stream, audio_io_handle_t output);
virtual void setParameters(audio_io_handle_t ioHandle,
const String8& keyValuePairs,
int delayMs = 0);
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();
virtual status_t setVoiceVolume(float volume, int delayMs = 0);
virtual status_t moveEffects(int session,
audio_io_handle_t srcOutput,
audio_io_handle_t dstOutput);
private:
AudioPolicyService();
virtual ~AudioPolicyService();
status_t dumpInternals(int fd);
// 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 {
class AudioCommand;
public:
// commands for tone AudioCommand
enum {
START_TONE,
STOP_TONE,
SET_VOLUME,
SET_PARAMETERS,
SET_VOICE_VOLUME
};
AudioCommandThread (String8 name);
virtual ~AudioCommandThread();
status_t dump(int fd);
// 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, int output, int delayMs = 0);
status_t parametersCommand(int ioHandle, const String8& keyValuePairs, int delayMs = 0);
status_t voiceVolumeCommand(float volume, int delayMs = 0);
void insertCommand_l(AudioCommand *command, int delayMs = 0);
private:
// descriptor for requested tone playback event
class AudioCommand {
public:
AudioCommand()
: mCommand(-1) {}
void dump(char* buffer, size_t size);
int mCommand; // START_TONE, STOP_TONE ...
nsecs_t mTime; // time stamp
Condition mCond; // condition for status return
status_t mStatus; // command status
bool mWaitStatus; // true if caller is waiting for status
void *mParam; // command parameter (ToneData, VolumeData, ParametersData)
};
class ToneData {
public:
int mType; // tone type (START_TONE only)
int mStream; // stream type (START_TONE only)
};
class VolumeData {
public:
int mStream;
float mVolume;
int mIO;
};
class ParametersData {
public:
int mIO;
String8 mKeyValuePairs;
};
class VoiceVolumeData {
public:
float mVolume;
};
Mutex mLock;
Condition mWaitWorkCV;
Vector <AudioCommand *> mAudioCommands; // list of pending commands
ToneGenerator *mpToneGenerator; // the tone generator
AudioCommand mLastCommand; // last processed command (used by dump)
String8 mName; // string used by wake lock fo delayed commands
};
// Internal dump utilities.
status_t dumpPermissionDenial(int fd);
Mutex mLock; // prevents concurrent access to AudioPolicy manager functions changing device
// connection stated our routing
AudioPolicyInterface* mpPolicyManager; // the platform specific policy manager
sp <AudioCommandThread> mAudioCommandThread; // audio commands thread
sp <AudioCommandThread> mTonePlaybackThread; // tone playback thread
};
}; // namespace android
#endif // ANDROID_AUDIOPOLICYSERVICE_H