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+/*
+ * 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>
+#include <hardware_legacy/AudioPolicyInterface.h>
+#include "AudioPolicyManager.h"
+
+namespace android {
+
+// ----------------------------------------------------------------------------
+
+class AudioPolicyService :
+ public BinderService<AudioPolicyService>,
+ public BnAudioPolicyService,
+ 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:
+ class AudioCommandData;
+
+ // 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
+ AudioCommandData *mParam; // command specific parameter data
+ };
+
+ class AudioCommandData {
+ public:
+ virtual ~AudioCommandData() {}
+ protected:
+ AudioCommandData() {}
+ };
+
+ class ToneData : public AudioCommandData {
+ public:
+ ToneGenerator::tone_type mType; // tone type (START_TONE only)
+ audio_stream_type_t mStream; // stream type (START_TONE only)
+ };
+
+ class VolumeData : public AudioCommandData {
+ public:
+ audio_stream_type_t mStream;
+ float mVolume;
+ audio_io_handle_t mIO;
+ };
+
+ class ParametersData : public AudioCommandData {
+ public:
+ audio_io_handle_t mIO;
+ String8 mKeyValuePairs;
+ };
+
+ class VoiceVolumeData : public AudioCommandData {
+ public:
+ float mVolume;
+ };
+
+ class StopOutputData : public AudioCommandData {
+ public:
+ audio_io_handle_t mIO;
+ audio_stream_type_t mStream;
+ int mSession;
+ };
+
+ class ReleaseOutputData : public AudioCommandData {
+ 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;
+ };
+
+ class AudioPolicyClient : public AudioPolicyClientInterface
+ {
+ public:
+ AudioPolicyClient(AudioPolicyService *service) : mAudioPolicyService(service) {}
+ virtual ~AudioPolicyClient() {}
+
+ //
+ // Audio HW module functions
+ //
+
+ // loads a HW module.
+ virtual audio_module_handle_t loadHwModule(const char *name);
+
+ //
+ // Audio output Control functions
+ //
+
+ // opens an audio output with the requested parameters. The parameter values can indicate to use the default values
+ // in case the audio policy manager has no specific requirements for the output being opened.
+ // When the function returns, the parameter values reflect the actual values used by the audio hardware output stream.
+ // The audio policy manager can check if the proposed parameters are suitable or not and act accordingly.
+ virtual audio_io_handle_t openOutput(audio_module_handle_t module,
+ audio_devices_t *pDevices,
+ uint32_t *pSamplingRate,
+ audio_format_t *pFormat,
+ audio_channel_mask_t *pChannelMask,
+ uint32_t *pLatencyMs,
+ audio_output_flags_t flags,
+ const audio_offload_info_t *offloadInfo = NULL);
+ // creates a special output that is duplicated to the two outputs passed as arguments. The duplication is performed by
+ // a special mixer thread in the AudioFlinger.
+ virtual audio_io_handle_t openDuplicateOutput(audio_io_handle_t output1, audio_io_handle_t output2);
+ // closes the output stream
+ virtual status_t closeOutput(audio_io_handle_t output);
+ // suspends the output. When an output is suspended, the corresponding audio hardware output stream is placed in
+ // standby and the AudioTracks attached to the mixer thread are still processed but the output mix is discarded.
+ virtual status_t suspendOutput(audio_io_handle_t output);
+ // restores a suspended output.
+ virtual status_t restoreOutput(audio_io_handle_t output);
+
+ //
+ // Audio input Control functions
+ //
+
+ // opens an audio input
+ virtual audio_io_handle_t openInput(audio_module_handle_t module,
+ audio_devices_t *pDevices,
+ uint32_t *pSamplingRate,
+ audio_format_t *pFormat,
+ audio_channel_mask_t *pChannelMask);
+ // closes an audio input
+ virtual status_t closeInput(audio_io_handle_t input);
+ //
+ // misc control functions
+ //
+
+ // set a stream volume for a particular output. For the same user setting, a given stream type can have different volumes
+ // for each output (destination device) it is attached to.
+ virtual status_t setStreamVolume(audio_stream_type_t stream, float volume, audio_io_handle_t output, int delayMs = 0);
+
+ // invalidate a stream type, causing a reroute to an unspecified new output
+ virtual status_t invalidateStream(audio_stream_type_t stream);
+
+ // function enabling to send proprietary informations directly from audio policy manager to audio hardware interface.
+ virtual void setParameters(audio_io_handle_t ioHandle, const String8& keyValuePairs, int delayMs = 0);
+ // function enabling to receive proprietary informations directly from audio hardware interface to audio policy manager.
+ virtual String8 getParameters(audio_io_handle_t ioHandle, const String8& keys);
+
+ // request the playback of a tone on the specified stream: used for instance to replace notification sounds when playing
+ // over a telephony device during a phone call.
+ virtual status_t startTone(audio_policy_tone_t tone, audio_stream_type_t stream);
+ virtual status_t stopTone();
+
+ // set down link audio volume.
+ virtual status_t setVoiceVolume(float volume, int delayMs = 0);
+
+ // move effect to the specified output
+ virtual status_t moveEffects(int session,
+ audio_io_handle_t srcOutput,
+ audio_io_handle_t dstOutput);
+
+ private:
+ AudioPolicyService *mAudioPolicyService;
+ };
+
+ 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;
+ AudioPolicyManager *mAudioPolicyManager;
+ AudioPolicyClient *mAudioPolicyClient;
+
+ KeyedVector< audio_source_t, InputSourceDesc* > mInputSources;
+ KeyedVector< audio_io_handle_t, InputDesc* > mInputs;
+};
+
+}; // namespace android
+
+#endif // ANDROID_AUDIOPOLICYSERVICE_H
generated by cgit v1.1 at 2024-05-14 02:10:05 +0000