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 33 namespace android { 34 35 // ---------------------------------------------------------------------------- 36 37 class AudioPolicyService : 38 public BinderService<AudioPolicyService>, 39 public BnAudioPolicyService, 40 // public AudioPolicyClientInterface, 41 public IBinder::DeathRecipient 42 { 43 friend class BinderService<AudioPolicyService>; 44 45 public: 46 // for BinderService getServiceName()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_output_flags_t flags = 69 AUDIO_OUTPUT_FLAG_NONE); 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 /*AUDIO_IN_ACOUSTICS_NONE*/, 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 audio_devices_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); 138 139 private: 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, 178 audio_io_handle_t output, int delayMs = 0); 179 status_t parametersCommand(audio_io_handle_t ioHandle, 180 const char *keyValuePairs, int delayMs = 0); 181 status_t voiceVolumeCommand(float volume, int delayMs = 0); 182 void insertCommand_l(AudioCommand *command, int delayMs = 0); 183 184 private: 185 // descriptor for requested tone playback event 186 class AudioCommand { 187 188 public: AudioCommand()189 AudioCommand() 190 : mCommand(-1) {} 191 192 void dump(char* buffer, size_t size); 193 194 int mCommand; // START_TONE, STOP_TONE ... 195 nsecs_t mTime; // time stamp 196 Condition mCond; // condition for status return 197 status_t mStatus; // command status 198 bool mWaitStatus; // true if caller is waiting for status 199 void *mParam; // command parameter (ToneData, VolumeData, ParametersData) 200 }; 201 202 class ToneData { 203 public: 204 ToneGenerator::tone_type mType; // tone type (START_TONE only) 205 audio_stream_type_t mStream; // stream type (START_TONE only) 206 }; 207 208 class VolumeData { 209 public: 210 audio_stream_type_t mStream; 211 float mVolume; 212 audio_io_handle_t mIO; 213 }; 214 215 class ParametersData { 216 public: 217 audio_io_handle_t mIO; 218 String8 mKeyValuePairs; 219 }; 220 221 class VoiceVolumeData { 222 public: 223 float mVolume; 224 }; 225 226 Mutex mLock; 227 Condition mWaitWorkCV; 228 Vector <AudioCommand *> mAudioCommands; // list of pending commands 229 ToneGenerator *mpToneGenerator; // the tone generator 230 AudioCommand mLastCommand; // last processed command (used by dump) 231 String8 mName; // string used by wake lock fo delayed commands 232 }; 233 234 class EffectDesc { 235 public: EffectDesc(const char * name,const effect_uuid_t & uuid)236 EffectDesc(const char *name, const effect_uuid_t& uuid) : 237 mName(strdup(name)), 238 mUuid(uuid) { } EffectDesc(const EffectDesc & orig)239 EffectDesc(const EffectDesc& orig) : 240 mName(strdup(orig.mName)), 241 mUuid(orig.mUuid) { 242 // deep copy mParams 243 for (size_t k = 0; k < orig.mParams.size(); k++) { 244 effect_param_t *origParam = orig.mParams[k]; 245 // psize and vsize are rounded up to an int boundary for allocation 246 size_t origSize = sizeof(effect_param_t) + 247 ((origParam->psize + 3) & ~3) + 248 ((origParam->vsize + 3) & ~3); 249 effect_param_t *dupParam = (effect_param_t *) malloc(origSize); 250 memcpy(dupParam, origParam, origSize); 251 // This works because the param buffer allocation is also done by 252 // multiples of 4 bytes originally. In theory we should memcpy only 253 // the actual param size, that is without rounding vsize. 254 mParams.add(dupParam); 255 } 256 } ~EffectDesc()257 /*virtual*/ ~EffectDesc() { 258 free(mName); 259 for (size_t k = 0; k < mParams.size(); k++) { 260 free(mParams[k]); 261 } 262 } 263 char *mName; 264 effect_uuid_t mUuid; 265 Vector <effect_param_t *> mParams; 266 }; 267 268 class InputSourceDesc { 269 public: InputSourceDesc()270 InputSourceDesc() {} ~InputSourceDesc()271 /*virtual*/ ~InputSourceDesc() { 272 for (size_t j = 0; j < mEffects.size(); j++) { 273 delete mEffects[j]; 274 } 275 } 276 Vector <EffectDesc *> mEffects; 277 }; 278 279 280 class InputDesc { 281 public: InputDesc(int session)282 InputDesc(int session) : mSessionId(session) {} ~InputDesc()283 /*virtual*/ ~InputDesc() {} 284 const int mSessionId; 285 Vector< sp<AudioEffect> >mEffects; 286 }; 287 288 static const char * const kInputSourceNames[AUDIO_SOURCE_CNT -1]; 289 290 void setPreProcessorEnabled(const InputDesc *inputDesc, bool enabled); 291 status_t loadPreProcessorConfig(const char *path); 292 status_t loadEffects(cnode *root, Vector <EffectDesc *>& effects); 293 EffectDesc *loadEffect(cnode *root); 294 status_t loadInputSources(cnode *root, const Vector <EffectDesc *>& effects); 295 audio_source_t inputSourceNameToEnum(const char *name); 296 InputSourceDesc *loadInputSource(cnode *root, const Vector <EffectDesc *>& effects); 297 void loadEffectParameters(cnode *root, Vector <effect_param_t *>& params); 298 effect_param_t *loadEffectParameter(cnode *root); 299 size_t readParamValue(cnode *node, 300 char *param, 301 size_t *curSize, 302 size_t *totSize); 303 size_t growParamSize(char *param, 304 size_t size, 305 size_t *curSize, 306 size_t *totSize); 307 308 // Internal dump utilities. 309 status_t dumpPermissionDenial(int fd); 310 311 312 mutable Mutex mLock; // prevents concurrent access to AudioPolicy manager functions changing 313 // device connection state or routing 314 sp<AudioCommandThread> mAudioCommandThread; // audio commands thread 315 sp<AudioCommandThread> mTonePlaybackThread; // tone playback thread 316 struct audio_policy_device *mpAudioPolicyDev; 317 struct audio_policy *mpAudioPolicy; 318 KeyedVector< audio_source_t, InputSourceDesc* > mInputSources; 319 KeyedVector< audio_io_handle_t, InputDesc* > mInputs; 320 }; 321 322 }; // namespace android 323 324 #endif // ANDROID_AUDIOPOLICYSERVICE_H 325