AudioPolicyService.h revision ff3c83e04ae459c4252b86dd4440b4e37ee92c16
1/* 2 * Copyright (C) 2009 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#ifndef ANDROID_AUDIOPOLICYSERVICE_H 18#define ANDROID_AUDIOPOLICYSERVICE_H 19 20#include <cutils/misc.h> 21#include <cutils/config_utils.h> 22#include <utils/String8.h> 23#include <utils/Vector.h> 24#include <utils/SortedVector.h> 25#include <binder/BinderService.h> 26#include <system/audio.h> 27#include <system/audio_policy.h> 28#include <hardware/audio_policy.h> 29#include <media/IAudioPolicyService.h> 30#include <media/ToneGenerator.h> 31#include <media/AudioEffect.h> 32 33namespace android { 34 35// ---------------------------------------------------------------------------- 36 37class AudioPolicyService : 38 public BinderService<AudioPolicyService>, 39 public BnAudioPolicyService, 40// public AudioPolicyClientInterface, 41 public IBinder::DeathRecipient 42{ 43 friend class BinderService<AudioPolicyService>; 44 45public: 46 // for BinderService 47 static const char *getServiceName() { return "media.audio_policy"; } 48 49 virtual status_t dump(int fd, const Vector<String16>& args); 50 51 // 52 // BnAudioPolicyService (see AudioPolicyInterface for method descriptions) 53 // 54 55 virtual status_t setDeviceConnectionState(audio_devices_t device, 56 audio_policy_dev_state_t state, 57 const char *device_address); 58 virtual audio_policy_dev_state_t getDeviceConnectionState( 59 audio_devices_t device, 60 const char *device_address); 61 virtual status_t setPhoneState(audio_mode_t state); 62 virtual status_t setForceUse(audio_policy_force_use_t usage, audio_policy_forced_cfg_t config); 63 virtual audio_policy_forced_cfg_t getForceUse(audio_policy_force_use_t usage); 64 virtual audio_io_handle_t getOutput(audio_stream_type_t stream, 65 uint32_t samplingRate = 0, 66 audio_format_t format = AUDIO_FORMAT_DEFAULT, 67 uint32_t channels = 0, 68 audio_policy_output_flags_t flags = 69 AUDIO_POLICY_OUTPUT_FLAG_INDIRECT); 70 virtual status_t startOutput(audio_io_handle_t output, 71 audio_stream_type_t stream, 72 int session = 0); 73 virtual status_t stopOutput(audio_io_handle_t output, 74 audio_stream_type_t stream, 75 int session = 0); 76 virtual void releaseOutput(audio_io_handle_t output); 77 virtual audio_io_handle_t getInput(audio_source_t inputSource, 78 uint32_t samplingRate = 0, 79 audio_format_t format = AUDIO_FORMAT_DEFAULT, 80 uint32_t channels = 0, 81 audio_in_acoustics_t acoustics = 82 (audio_in_acoustics_t)0, 83 int audioSession = 0); 84 virtual status_t startInput(audio_io_handle_t input); 85 virtual status_t stopInput(audio_io_handle_t input); 86 virtual void releaseInput(audio_io_handle_t input); 87 virtual status_t initStreamVolume(audio_stream_type_t stream, 88 int indexMin, 89 int indexMax); 90 virtual status_t setStreamVolumeIndex(audio_stream_type_t stream, 91 int index, 92 audio_devices_t device); 93 virtual status_t getStreamVolumeIndex(audio_stream_type_t stream, 94 int *index, 95 audio_devices_t device); 96 97 virtual uint32_t getStrategyForStream(audio_stream_type_t stream); 98 virtual uint32_t getDevicesForStream(audio_stream_type_t stream); 99 100 virtual audio_io_handle_t getOutputForEffect(effect_descriptor_t *desc); 101 virtual status_t registerEffect(effect_descriptor_t *desc, 102 audio_io_handle_t io, 103 uint32_t strategy, 104 int session, 105 int id); 106 virtual status_t unregisterEffect(int id); 107 virtual status_t setEffectEnabled(int id, bool enabled); 108 virtual bool isStreamActive(audio_stream_type_t stream, uint32_t inPastMs = 0) const; 109 110 virtual status_t queryDefaultPreProcessing(int audioSession, 111 effect_descriptor_t *descriptors, 112 uint32_t *count); 113 virtual status_t onTransact( 114 uint32_t code, 115 const Parcel& data, 116 Parcel* reply, 117 uint32_t flags); 118 119 // IBinder::DeathRecipient 120 virtual void binderDied(const wp<IBinder>& who); 121 122 // 123 // Helpers for the struct audio_policy_service_ops implementation. 124 // This is used by the audio policy manager for certain operations that 125 // are implemented by the policy service. 126 // 127 virtual void setParameters(audio_io_handle_t ioHandle, 128 const char *keyValuePairs, 129 int delayMs); 130 131 virtual status_t setStreamVolume(audio_stream_type_t stream, 132 float volume, 133 audio_io_handle_t output, 134 int delayMs = 0); 135 virtual status_t startTone(audio_policy_tone_t tone, audio_stream_type_t stream); 136 virtual status_t stopTone(); 137 virtual status_t setVoiceVolume(float volume, int delayMs = 0); 138 139private: 140 AudioPolicyService(); 141 virtual ~AudioPolicyService(); 142 143 status_t dumpInternals(int fd); 144 145 // Thread used for tone playback and to send audio config commands to audio flinger 146 // For tone playback, using a separate thread is necessary to avoid deadlock with mLock because startTone() 147 // and stopTone() are normally called with mLock locked and requesting a tone start or stop will cause 148 // calls to AudioPolicyService and an attempt to lock mLock. 149 // For audio config commands, it is necessary because audio flinger requires that the calling process (user) 150 // has permission to modify audio settings. 151 class AudioCommandThread : public Thread { 152 class AudioCommand; 153 public: 154 155 // commands for tone AudioCommand 156 enum { 157 START_TONE, 158 STOP_TONE, 159 SET_VOLUME, 160 SET_PARAMETERS, 161 SET_VOICE_VOLUME 162 }; 163 164 AudioCommandThread (String8 name); 165 virtual ~AudioCommandThread(); 166 167 status_t dump(int fd); 168 169 // Thread virtuals 170 virtual void onFirstRef(); 171 virtual bool threadLoop(); 172 173 void exit(); 174 void startToneCommand(ToneGenerator::tone_type type, 175 audio_stream_type_t stream); 176 void stopToneCommand(); 177 status_t volumeCommand(audio_stream_type_t stream, float volume, int output, int delayMs = 0); 178 status_t parametersCommand(int ioHandle, const char *keyValuePairs, int delayMs = 0); 179 status_t voiceVolumeCommand(float volume, int delayMs = 0); 180 void insertCommand_l(AudioCommand *command, int delayMs = 0); 181 182 private: 183 // descriptor for requested tone playback event 184 class AudioCommand { 185 186 public: 187 AudioCommand() 188 : mCommand(-1) {} 189 190 void dump(char* buffer, size_t size); 191 192 int mCommand; // START_TONE, STOP_TONE ... 193 nsecs_t mTime; // time stamp 194 Condition mCond; // condition for status return 195 status_t mStatus; // command status 196 bool mWaitStatus; // true if caller is waiting for status 197 void *mParam; // command parameter (ToneData, VolumeData, ParametersData) 198 }; 199 200 class ToneData { 201 public: 202 ToneGenerator::tone_type mType; // tone type (START_TONE only) 203 audio_stream_type_t mStream; // stream type (START_TONE only) 204 }; 205 206 class VolumeData { 207 public: 208 audio_stream_type_t mStream; 209 float mVolume; 210 int mIO; 211 }; 212 213 class ParametersData { 214 public: 215 int mIO; 216 String8 mKeyValuePairs; 217 }; 218 219 class VoiceVolumeData { 220 public: 221 float mVolume; 222 }; 223 224 Mutex mLock; 225 Condition mWaitWorkCV; 226 Vector <AudioCommand *> mAudioCommands; // list of pending commands 227 ToneGenerator *mpToneGenerator; // the tone generator 228 AudioCommand mLastCommand; // last processed command (used by dump) 229 String8 mName; // string used by wake lock fo delayed commands 230 }; 231 232 class EffectDesc { 233 public: 234 EffectDesc() {} 235 virtual ~EffectDesc() {} 236 char *mName; 237 effect_uuid_t mUuid; 238 Vector <effect_param_t *> mParams; 239 }; 240 241 class InputSourceDesc { 242 public: 243 InputSourceDesc() {} 244 virtual ~InputSourceDesc() {} 245 Vector <EffectDesc *> mEffects; 246 }; 247 248 249 class InputDesc { 250 public: 251 InputDesc() {} 252 virtual ~InputDesc() {} 253 int mSessionId; 254 Vector< sp<AudioEffect> >mEffects; 255 }; 256 257 static const char * const kInputSourceNames[AUDIO_SOURCE_CNT -1]; 258 259 void setPreProcessorEnabled(InputDesc *inputDesc, bool enabled); 260 status_t loadPreProcessorConfig(const char *path); 261 status_t loadEffects(cnode *root, Vector <EffectDesc *>& effects); 262 EffectDesc *loadEffect(cnode *root); 263 status_t loadInputSources(cnode *root, const Vector <EffectDesc *>& effects); 264 audio_source_t inputSourceNameToEnum(const char *name); 265 InputSourceDesc *loadInputSource(cnode *root, const Vector <EffectDesc *>& effects); 266 void loadEffectParameters(cnode *root, Vector <effect_param_t *>& params); 267 effect_param_t *loadEffectParameter(cnode *root); 268 size_t readParamValue(cnode *node, 269 char *param, 270 size_t *curSize, 271 size_t *totSize); 272 size_t growParamSize(char *param, 273 size_t size, 274 size_t *curSize, 275 size_t *totSize); 276 277 // Internal dump utilities. 278 status_t dumpPermissionDenial(int fd); 279 280 281 mutable Mutex mLock; // prevents concurrent access to AudioPolicy manager functions changing 282 // device connection state or routing 283 sp <AudioCommandThread> mAudioCommandThread; // audio commands thread 284 sp <AudioCommandThread> mTonePlaybackThread; // tone playback thread 285 struct audio_policy_device *mpAudioPolicyDev; 286 struct audio_policy *mpAudioPolicy; 287 KeyedVector< audio_source_t, InputSourceDesc* > mInputSources; 288 KeyedVector< audio_io_handle_t, InputDesc* > mInputs; 289}; 290 291}; // namespace android 292 293#endif // ANDROID_AUDIOPOLICYSERVICE_H 294