325 lines
14 KiB
C++
325 lines
14 KiB
C++
/*
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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 <cutils/misc.h>
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#include <cutils/config_utils.h>
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#include <utils/String8.h>
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#include <utils/Vector.h>
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#include <utils/SortedVector.h>
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#include <binder/BinderService.h>
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#include <system/audio.h>
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#include <system/audio_policy.h>
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#include <hardware/audio_policy.h>
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#include <media/IAudioPolicyService.h>
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#include <media/ToneGenerator.h>
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#include <media/AudioEffect.h>
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namespace android {
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// ----------------------------------------------------------------------------
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class AudioPolicyService :
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public BinderService<AudioPolicyService>,
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public BnAudioPolicyService,
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// public AudioPolicyClientInterface,
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public IBinder::DeathRecipient
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{
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friend class BinderService<AudioPolicyService>;
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public:
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// for BinderService
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static const char *getServiceName() { return "media.audio_policy"; }
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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(audio_devices_t device,
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audio_policy_dev_state_t state,
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const char *device_address);
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virtual audio_policy_dev_state_t getDeviceConnectionState(
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audio_devices_t device,
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const char *device_address);
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virtual status_t setPhoneState(audio_mode_t state);
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virtual status_t setForceUse(audio_policy_force_use_t usage, audio_policy_forced_cfg_t config);
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virtual audio_policy_forced_cfg_t getForceUse(audio_policy_force_use_t usage);
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virtual audio_io_handle_t getOutput(audio_stream_type_t stream,
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uint32_t samplingRate = 0,
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audio_format_t format = AUDIO_FORMAT_DEFAULT,
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uint32_t channels = 0,
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audio_policy_output_flags_t flags =
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AUDIO_POLICY_OUTPUT_FLAG_NONE);
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virtual status_t startOutput(audio_io_handle_t output,
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audio_stream_type_t stream,
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int session = 0);
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virtual status_t stopOutput(audio_io_handle_t output,
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audio_stream_type_t stream,
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int session = 0);
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virtual void releaseOutput(audio_io_handle_t output);
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virtual audio_io_handle_t getInput(audio_source_t inputSource,
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uint32_t samplingRate = 0,
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audio_format_t format = AUDIO_FORMAT_DEFAULT,
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uint32_t channels = 0,
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audio_in_acoustics_t acoustics =
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(audio_in_acoustics_t)0 /*AUDIO_IN_ACOUSTICS_NONE*/,
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int audioSession = 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(audio_stream_type_t stream,
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int indexMin,
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int indexMax);
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virtual status_t setStreamVolumeIndex(audio_stream_type_t stream,
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int index,
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audio_devices_t device);
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virtual status_t getStreamVolumeIndex(audio_stream_type_t stream,
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int *index,
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audio_devices_t device);
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virtual uint32_t getStrategyForStream(audio_stream_type_t stream);
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virtual audio_devices_t getDevicesForStream(audio_stream_type_t stream);
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virtual audio_io_handle_t getOutputForEffect(effect_descriptor_t *desc);
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virtual status_t registerEffect(effect_descriptor_t *desc,
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audio_io_handle_t io,
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uint32_t strategy,
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int session,
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int id);
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virtual status_t unregisterEffect(int id);
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virtual status_t setEffectEnabled(int id, bool enabled);
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virtual bool isStreamActive(audio_stream_type_t stream, uint32_t inPastMs = 0) const;
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virtual status_t queryDefaultPreProcessing(int audioSession,
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effect_descriptor_t *descriptors,
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uint32_t *count);
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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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// Helpers for the struct audio_policy_service_ops implementation.
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// This is used by the audio policy manager for certain operations that
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// are implemented by the policy service.
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//
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virtual void setParameters(audio_io_handle_t ioHandle,
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const char *keyValuePairs,
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int delayMs);
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virtual status_t setStreamVolume(audio_stream_type_t stream,
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float volume,
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audio_io_handle_t output,
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int delayMs = 0);
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virtual status_t startTone(audio_policy_tone_t tone, audio_stream_type_t stream);
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virtual status_t stopTone();
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virtual status_t setVoiceVolume(float volume, int delayMs = 0);
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private:
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AudioPolicyService();
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virtual ~AudioPolicyService();
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status_t dumpInternals(int fd);
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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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class AudioCommand;
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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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SET_VOICE_VOLUME
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};
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AudioCommandThread (String8 name);
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virtual ~AudioCommandThread();
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status_t dump(int fd);
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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(ToneGenerator::tone_type type,
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audio_stream_type_t stream);
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void stopToneCommand();
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status_t volumeCommand(audio_stream_type_t stream, float volume,
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audio_io_handle_t output, int delayMs = 0);
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status_t parametersCommand(audio_io_handle_t ioHandle,
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const char *keyValuePairs, int delayMs = 0);
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status_t voiceVolumeCommand(float volume, int delayMs = 0);
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void insertCommand_l(AudioCommand *command, int delayMs = 0);
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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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AudioCommand()
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: mCommand(-1) {}
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void dump(char* buffer, size_t size);
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int mCommand; // START_TONE, STOP_TONE ...
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nsecs_t mTime; // time stamp
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Condition mCond; // condition for status return
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status_t mStatus; // command status
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bool mWaitStatus; // true if caller is waiting for status
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void *mParam; // command parameter (ToneData, VolumeData, ParametersData)
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};
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class ToneData {
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public:
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ToneGenerator::tone_type mType; // tone type (START_TONE only)
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audio_stream_type_t 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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audio_stream_type_t mStream;
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float mVolume;
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audio_io_handle_t mIO;
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};
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class ParametersData {
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public:
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audio_io_handle_t mIO;
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String8 mKeyValuePairs;
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};
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class VoiceVolumeData {
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public:
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float mVolume;
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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 commands
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ToneGenerator *mpToneGenerator; // the tone generator
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AudioCommand mLastCommand; // last processed command (used by dump)
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String8 mName; // string used by wake lock fo delayed commands
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};
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class EffectDesc {
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public:
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EffectDesc(const char *name, const effect_uuid_t& uuid) :
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mName(strdup(name)),
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mUuid(uuid) { }
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EffectDesc(const EffectDesc& orig) :
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mName(strdup(orig.mName)),
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mUuid(orig.mUuid) {
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// deep copy mParams
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for (size_t k = 0; k < orig.mParams.size(); k++) {
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effect_param_t *origParam = orig.mParams[k];
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// psize and vsize are rounded up to an int boundary for allocation
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size_t origSize = sizeof(effect_param_t) +
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((origParam->psize + 3) & ~3) +
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((origParam->vsize + 3) & ~3);
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effect_param_t *dupParam = (effect_param_t *) malloc(origSize);
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memcpy(dupParam, origParam, origSize);
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// This works because the param buffer allocation is also done by
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// multiples of 4 bytes originally. In theory we should memcpy only
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// the actual param size, that is without rounding vsize.
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mParams.add(dupParam);
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}
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}
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/*virtual*/ ~EffectDesc() {
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free(mName);
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for (size_t k = 0; k < mParams.size(); k++) {
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free(mParams[k]);
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}
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}
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char *mName;
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effect_uuid_t mUuid;
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Vector <effect_param_t *> mParams;
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};
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class InputSourceDesc {
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public:
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InputSourceDesc() {}
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/*virtual*/ ~InputSourceDesc() {
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for (size_t j = 0; j < mEffects.size(); j++) {
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delete mEffects[j];
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}
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}
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Vector <EffectDesc *> mEffects;
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};
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class InputDesc {
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public:
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InputDesc(int session) : mSessionId(session) {}
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/*virtual*/ ~InputDesc() {}
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const int mSessionId;
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Vector< sp<AudioEffect> >mEffects;
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};
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static const char * const kInputSourceNames[AUDIO_SOURCE_CNT -1];
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void setPreProcessorEnabled(const InputDesc *inputDesc, bool enabled);
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status_t loadPreProcessorConfig(const char *path);
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status_t loadEffects(cnode *root, Vector <EffectDesc *>& effects);
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EffectDesc *loadEffect(cnode *root);
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status_t loadInputSources(cnode *root, const Vector <EffectDesc *>& effects);
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audio_source_t inputSourceNameToEnum(const char *name);
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InputSourceDesc *loadInputSource(cnode *root, const Vector <EffectDesc *>& effects);
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void loadEffectParameters(cnode *root, Vector <effect_param_t *>& params);
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effect_param_t *loadEffectParameter(cnode *root);
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size_t readParamValue(cnode *node,
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char *param,
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size_t *curSize,
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size_t *totSize);
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size_t growParamSize(char *param,
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size_t size,
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size_t *curSize,
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size_t *totSize);
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// Internal dump utilities.
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status_t dumpPermissionDenial(int fd);
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mutable Mutex mLock; // prevents concurrent access to AudioPolicy manager functions changing
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// device connection state or routing
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sp <AudioCommandThread> mAudioCommandThread; // audio commands thread
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sp <AudioCommandThread> mTonePlaybackThread; // tone playback thread
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struct audio_policy_device *mpAudioPolicyDev;
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struct audio_policy *mpAudioPolicy;
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KeyedVector< audio_source_t, InputSourceDesc* > mInputSources;
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KeyedVector< audio_io_handle_t, InputDesc* > mInputs;
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};
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}; // namespace android
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#endif // ANDROID_AUDIOPOLICYSERVICE_H
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