diff options
Diffstat (limited to 'services/audiopolicy/AudioPolicyService.h')
| -rw-r--r-- | services/audiopolicy/AudioPolicyService.h | 353 |
1 files changed, 353 insertions, 0 deletions
diff --git a/services/audiopolicy/AudioPolicyService.h b/services/audiopolicy/AudioPolicyService.h new file mode 100644 index 0000000..ae053a9 --- /dev/null +++ b/services/audiopolicy/AudioPolicyService.h @@ -0,0 +1,353 @@ +/* + * 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 <cutils/misc.h> +#include <cutils/config_utils.h> +#include <cutils/compiler.h> +#include <utils/String8.h> +#include <utils/Vector.h> +#include <utils/SortedVector.h> +#include <binder/BinderService.h> +#include <system/audio.h> +#include <system/audio_policy.h> +#include <hardware/audio_policy.h> +#include <media/IAudioPolicyService.h> +#include <media/ToneGenerator.h> +#include <media/AudioEffect.h> + +namespace android { + +// ---------------------------------------------------------------------------- + +class AudioPolicyService : + public BinderService<AudioPolicyService>, + public BnAudioPolicyService, +// public AudioPolicyClientInterface, + public IBinder::DeathRecipient +{ + friend class BinderService<AudioPolicyService>; + +public: + // for BinderService + static const char *getServiceName() ANDROID_API { return "media.audio_policy"; } + + virtual status_t dump(int fd, const Vector<String16>& args); + + // + // BnAudioPolicyService (see AudioPolicyInterface for method descriptions) + // + + virtual status_t setDeviceConnectionState(audio_devices_t device, + audio_policy_dev_state_t state, + const char *device_address); + virtual audio_policy_dev_state_t getDeviceConnectionState( + audio_devices_t device, + const char *device_address); + virtual status_t setPhoneState(audio_mode_t state); + virtual status_t setForceUse(audio_policy_force_use_t usage, audio_policy_forced_cfg_t config); + virtual audio_policy_forced_cfg_t getForceUse(audio_policy_force_use_t usage); + virtual audio_io_handle_t getOutput(audio_stream_type_t stream, + uint32_t samplingRate = 0, + audio_format_t format = AUDIO_FORMAT_DEFAULT, + audio_channel_mask_t channelMask = 0, + audio_output_flags_t flags = + AUDIO_OUTPUT_FLAG_NONE, + const audio_offload_info_t *offloadInfo = NULL); + virtual status_t startOutput(audio_io_handle_t output, + audio_stream_type_t stream, + int session = 0); + virtual status_t stopOutput(audio_io_handle_t output, + audio_stream_type_t stream, + int session = 0); + virtual void releaseOutput(audio_io_handle_t output); + virtual audio_io_handle_t getInput(audio_source_t inputSource, + uint32_t samplingRate = 0, + audio_format_t format = AUDIO_FORMAT_DEFAULT, + audio_channel_mask_t channelMask = 0, + int audioSession = 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(audio_stream_type_t stream, + int indexMin, + int indexMax); + virtual status_t setStreamVolumeIndex(audio_stream_type_t stream, + int index, + audio_devices_t device); + virtual status_t getStreamVolumeIndex(audio_stream_type_t stream, + int *index, + audio_devices_t device); + + virtual uint32_t getStrategyForStream(audio_stream_type_t stream); + virtual audio_devices_t getDevicesForStream(audio_stream_type_t stream); + + virtual audio_io_handle_t getOutputForEffect(const effect_descriptor_t *desc); + virtual status_t registerEffect(const effect_descriptor_t *desc, + audio_io_handle_t io, + uint32_t strategy, + int session, + int id); + virtual status_t unregisterEffect(int id); + virtual status_t setEffectEnabled(int id, bool enabled); + virtual bool isStreamActive(audio_stream_type_t stream, uint32_t inPastMs = 0) const; + virtual bool isStreamActiveRemotely(audio_stream_type_t stream, uint32_t inPastMs = 0) const; + virtual bool isSourceActive(audio_source_t source) const; + + virtual status_t queryDefaultPreProcessing(int audioSession, + effect_descriptor_t *descriptors, + uint32_t *count); + virtual status_t onTransact( + uint32_t code, + const Parcel& data, + Parcel* reply, + uint32_t flags); + + // IBinder::DeathRecipient + virtual void binderDied(const wp<IBinder>& who); + + // + // Helpers for the struct audio_policy_service_ops implementation. + // This is used by the audio policy manager for certain operations that + // are implemented by the policy service. + // + virtual void setParameters(audio_io_handle_t ioHandle, + const char *keyValuePairs, + int delayMs); + + virtual status_t setStreamVolume(audio_stream_type_t stream, + float volume, + audio_io_handle_t output, + int delayMs = 0); + virtual status_t startTone(audio_policy_tone_t tone, audio_stream_type_t stream); + virtual status_t stopTone(); + virtual status_t setVoiceVolume(float volume, int delayMs = 0); + virtual bool isOffloadSupported(const audio_offload_info_t &config); + + status_t doStopOutput(audio_io_handle_t output, + audio_stream_type_t stream, + int session = 0); + void doReleaseOutput(audio_io_handle_t output); + +private: + AudioPolicyService() ANDROID_API; + 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, + STOP_OUTPUT, + RELEASE_OUTPUT + }; + + AudioCommandThread (String8 name, const wp<AudioPolicyService>& service); + virtual ~AudioCommandThread(); + + status_t dump(int fd); + + // Thread virtuals + virtual void onFirstRef(); + virtual bool threadLoop(); + + void exit(); + void startToneCommand(ToneGenerator::tone_type type, + audio_stream_type_t stream); + void stopToneCommand(); + status_t volumeCommand(audio_stream_type_t stream, float volume, + audio_io_handle_t output, int delayMs = 0); + status_t parametersCommand(audio_io_handle_t ioHandle, + const char *keyValuePairs, int delayMs = 0); + status_t voiceVolumeCommand(float volume, int delayMs = 0); + void stopOutputCommand(audio_io_handle_t output, + audio_stream_type_t stream, + int session); + void releaseOutputCommand(audio_io_handle_t output); + + 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: + ToneGenerator::tone_type mType; // tone type (START_TONE only) + audio_stream_type_t mStream; // stream type (START_TONE only) + }; + + class VolumeData { + public: + audio_stream_type_t mStream; + float mVolume; + audio_io_handle_t mIO; + }; + + class ParametersData { + public: + audio_io_handle_t mIO; + String8 mKeyValuePairs; + }; + + class VoiceVolumeData { + public: + float mVolume; + }; + + class StopOutputData { + public: + audio_io_handle_t mIO; + audio_stream_type_t mStream; + int mSession; + }; + + class ReleaseOutputData { + public: + audio_io_handle_t mIO; + }; + + 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 + wp<AudioPolicyService> mService; + }; + + class EffectDesc { + public: + EffectDesc(const char *name, const effect_uuid_t& uuid) : + mName(strdup(name)), + mUuid(uuid) { } + EffectDesc(const EffectDesc& orig) : + mName(strdup(orig.mName)), + mUuid(orig.mUuid) { + // deep copy mParams + for (size_t k = 0; k < orig.mParams.size(); k++) { + effect_param_t *origParam = orig.mParams[k]; + // psize and vsize are rounded up to an int boundary for allocation + size_t origSize = sizeof(effect_param_t) + + ((origParam->psize + 3) & ~3) + + ((origParam->vsize + 3) & ~3); + effect_param_t *dupParam = (effect_param_t *) malloc(origSize); + memcpy(dupParam, origParam, origSize); + // This works because the param buffer allocation is also done by + // multiples of 4 bytes originally. In theory we should memcpy only + // the actual param size, that is without rounding vsize. + mParams.add(dupParam); + } + } + /*virtual*/ ~EffectDesc() { + free(mName); + for (size_t k = 0; k < mParams.size(); k++) { + free(mParams[k]); + } + } + char *mName; + effect_uuid_t mUuid; + Vector <effect_param_t *> mParams; + }; + + class InputSourceDesc { + public: + InputSourceDesc() {} + /*virtual*/ ~InputSourceDesc() { + for (size_t j = 0; j < mEffects.size(); j++) { + delete mEffects[j]; + } + } + Vector <EffectDesc *> mEffects; + }; + + + class InputDesc { + public: + InputDesc(int session) : mSessionId(session) {} + /*virtual*/ ~InputDesc() {} + const int mSessionId; + Vector< sp<AudioEffect> >mEffects; + }; + + static const char * const kInputSourceNames[AUDIO_SOURCE_CNT -1]; + + void setPreProcessorEnabled(const InputDesc *inputDesc, bool enabled); + status_t loadPreProcessorConfig(const char *path); + status_t loadEffects(cnode *root, Vector <EffectDesc *>& effects); + EffectDesc *loadEffect(cnode *root); + status_t loadInputSources(cnode *root, const Vector <EffectDesc *>& effects); + audio_source_t inputSourceNameToEnum(const char *name); + InputSourceDesc *loadInputSource(cnode *root, const Vector <EffectDesc *>& effects); + void loadEffectParameters(cnode *root, Vector <effect_param_t *>& params); + effect_param_t *loadEffectParameter(cnode *root); + size_t readParamValue(cnode *node, + char *param, + size_t *curSize, + size_t *totSize); + size_t growParamSize(char *param, + size_t size, + size_t *curSize, + size_t *totSize); + + // Internal dump utilities. + status_t dumpPermissionDenial(int fd); + + + mutable Mutex mLock; // prevents concurrent access to AudioPolicy manager functions changing + // device connection state or routing + sp<AudioCommandThread> mAudioCommandThread; // audio commands thread + sp<AudioCommandThread> mTonePlaybackThread; // tone playback thread + sp<AudioCommandThread> mOutputCommandThread; // process stop and release output + struct audio_policy_device *mpAudioPolicyDev; + struct audio_policy *mpAudioPolicy; + KeyedVector< audio_source_t, InputSourceDesc* > mInputSources; + KeyedVector< audio_io_handle_t, InputDesc* > mInputs; +}; + +}; // namespace android + +#endif // ANDROID_AUDIOPOLICYSERVICE_H |