2 * Copyright (C) 2009 The Android Open Source Project
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
19 #include <sys/types.h>
20 #include <utils/Timers.h>
21 #include <utils/Errors.h>
22 #include <utils/KeyedVector.h>
23 #include <hardware_legacy/AudioPolicyInterface.h>
28 // ----------------------------------------------------------------------------
30 #define MAX_DEVICE_ADDRESS_LEN 20
31 // Attenuation applied to STRATEGY_SONIFICATION streams when a headset is connected: 6dB
32 #define SONIFICATION_HEADSET_VOLUME_FACTOR 0.5
33 // Min volume for STRATEGY_SONIFICATION streams when limited by music volume: -36dB
34 #define SONIFICATION_HEADSET_VOLUME_MIN 0.016
35 // Time in seconds during which we consider that music is still active after a music
36 // track was stopped - see computeVolume()
37 #define SONIFICATION_HEADSET_MUSIC_DELAY 5
38 // Time in milliseconds during witch some streams are muted while the audio path
40 #define MUTE_TIME_MS 2000
42 #define NUM_TEST_OUTPUTS 5
44 // ----------------------------------------------------------------------------
45 // AudioPolicyManagerBase implements audio policy manager behavior common to all platforms.
46 // Each platform must implement an AudioPolicyManager class derived from AudioPolicyManagerBase
47 // and override methods for which the platform specific behavior differs from the implementation
48 // in AudioPolicyManagerBase. Even if no specific behavior is required, the AudioPolicyManager
49 // class must be implemented as well as the class factory function createAudioPolicyManager()
50 // and provided in a shared library libaudiopolicy.so.
51 // ----------------------------------------------------------------------------
53 class AudioPolicyManagerBase: public AudioPolicyInterface
54 #ifdef AUDIO_POLICY_TEST
56 #endif //AUDIO_POLICY_TEST
60 AudioPolicyManagerBase(AudioPolicyClientInterface *clientInterface);
61 virtual ~AudioPolicyManagerBase();
63 // AudioPolicyInterface
64 virtual status_t setDeviceConnectionState(AudioSystem::audio_devices device,
65 AudioSystem::device_connection_state state,
66 const char *device_address);
67 virtual AudioSystem::device_connection_state getDeviceConnectionState(AudioSystem::audio_devices device,
68 const char *device_address);
69 virtual void setPhoneState(int state);
70 virtual void setRingerMode(uint32_t mode, uint32_t mask);
71 virtual void setForceUse(AudioSystem::force_use usage, AudioSystem::forced_config config);
72 virtual AudioSystem::forced_config getForceUse(AudioSystem::force_use usage);
73 virtual void setSystemProperty(const char* property, const char* value);
74 virtual audio_io_handle_t getOutput(AudioSystem::stream_type stream,
75 uint32_t samplingRate = 0,
76 uint32_t format = AudioSystem::FORMAT_DEFAULT,
77 uint32_t channels = 0,
78 AudioSystem::output_flags flags =
79 AudioSystem::OUTPUT_FLAG_INDIRECT);
80 virtual status_t startOutput(audio_io_handle_t output,
81 AudioSystem::stream_type stream,
83 virtual status_t stopOutput(audio_io_handle_t output,
84 AudioSystem::stream_type stream,
86 virtual void releaseOutput(audio_io_handle_t output);
87 virtual audio_io_handle_t getInput(int inputSource,
88 uint32_t samplingRate,
91 AudioSystem::audio_in_acoustics acoustics);
92 // indicates to the audio policy manager that the input starts being used.
93 virtual status_t startInput(audio_io_handle_t input);
94 // indicates to the audio policy manager that the input stops being used.
95 virtual status_t stopInput(audio_io_handle_t input);
96 virtual void releaseInput(audio_io_handle_t input);
97 virtual void initStreamVolume(AudioSystem::stream_type stream,
100 virtual status_t setStreamVolumeIndex(AudioSystem::stream_type stream, int index);
101 virtual status_t getStreamVolumeIndex(AudioSystem::stream_type stream, int *index);
103 // return the strategy corresponding to a given stream type
104 virtual uint32_t getStrategyForStream(AudioSystem::stream_type stream);
106 virtual audio_io_handle_t getOutputForEffect(effect_descriptor_t *desc);
107 virtual status_t registerEffect(effect_descriptor_t *desc,
108 audio_io_handle_t output,
112 virtual status_t unregisterEffect(int id);
114 virtual status_t dump(int fd);
118 enum routing_strategy {
121 STRATEGY_SONIFICATION,
126 // descriptor for audio outputs. Used to maintain current configuration of each opened audio output
127 // and keep track of the usage of this output by each audio stream type.
128 class AudioOutputDescriptor
131 AudioOutputDescriptor();
133 status_t dump(int fd);
136 void changeRefCount(AudioSystem::stream_type, int delta);
138 uint32_t strategyRefCount(routing_strategy strategy);
139 bool isUsedByStrategy(routing_strategy strategy) { return (strategyRefCount(strategy) != 0);}
140 bool isDuplicated() { return (mOutput1 != NULL && mOutput2 != NULL); }
142 audio_io_handle_t mId; // output handle
143 uint32_t mSamplingRate; //
145 uint32_t mChannels; // output configuration
146 uint32_t mLatency; //
147 AudioSystem::output_flags mFlags; //
148 uint32_t mDevice; // current device this output is routed to
149 uint32_t mRefCount[AudioSystem::NUM_STREAM_TYPES]; // number of streams of each type using this output
150 AudioOutputDescriptor *mOutput1; // used by duplicated outputs: first output
151 AudioOutputDescriptor *mOutput2; // used by duplicated outputs: second output
152 float mCurVolume[AudioSystem::NUM_STREAM_TYPES]; // current stream volume
153 int mMuteCount[AudioSystem::NUM_STREAM_TYPES]; // mute request counter
156 // descriptor for audio inputs. Used to maintain current configuration of each opened audio input
157 // and keep track of the usage of this input.
158 class AudioInputDescriptor
161 AudioInputDescriptor();
163 status_t dump(int fd);
165 uint32_t mSamplingRate; //
166 uint32_t mFormat; // input configuration
167 uint32_t mChannels; //
168 AudioSystem::audio_in_acoustics mAcoustics; //
169 uint32_t mDevice; // current device this input is routed to
170 uint32_t mRefCount; // number of AudioRecord clients using this output
171 int mInputSource; // input source selected by application (mediarecorder.h)
174 // stream descriptor used for volume control
175 class StreamDescriptor
179 : mIndexMin(0), mIndexMax(1), mIndexCur(1), mCanBeMuted(true) {}
181 void dump(char* buffer, size_t size);
183 int mIndexMin; // min volume index
184 int mIndexMax; // max volume index
185 int mIndexCur; // current volume index
186 bool mCanBeMuted; // true is the stream can be muted
189 // stream descriptor used for volume control
190 class EffectDescriptor
194 status_t dump(int fd);
196 int mOutput; // output the effect is attached to
197 routing_strategy mStrategy; // routing strategy the effect is associated to
198 int mSession; // audio session the effect is on
199 effect_descriptor_t mDesc; // effect descriptor
202 void addOutput(audio_io_handle_t id, AudioOutputDescriptor *outputDesc);
204 // return the strategy corresponding to a given stream type
205 static routing_strategy getStrategy(AudioSystem::stream_type stream);
206 // return appropriate device for streams handled by the specified strategy according to current
207 // phone state, connected devices...
208 // if fromCache is true, the device is returned from mDeviceForStrategy[], otherwise it is determined
209 // by current state (device connected, phone state, force use, a2dp output...)
211 // 1 speed up process when the state is stable (when starting or stopping an output)
212 // 2 access to either current device selection (fromCache == true) or
213 // "future" device selection (fromCache == false) when called from a context
214 // where conditions are changing (setDeviceConnectionState(), setPhoneState()...) AND
215 // before updateDeviceForStrategy() is called.
216 virtual uint32_t getDeviceForStrategy(routing_strategy strategy, bool fromCache = true);
217 // change the route of the specified output
218 void setOutputDevice(audio_io_handle_t output, uint32_t device, bool force = false, int delayMs = 0);
219 // select input device corresponding to requested audio source
220 virtual uint32_t getDeviceForInputSource(int inputSource);
221 // return io handle of active input or 0 if no input is active
222 audio_io_handle_t getActiveInput();
223 // compute the actual volume for a given stream according to the requested index and a particular
225 virtual float computeVolume(int stream, int index, audio_io_handle_t output, uint32_t device);
226 // check that volume change is permitted, compute and send new volume to audio hardware
227 status_t checkAndSetVolume(int stream, int index, audio_io_handle_t output, uint32_t device, int delayMs = 0, bool force = false);
228 // apply all stream volumes to the specified output and device
229 void applyStreamVolumes(audio_io_handle_t output, uint32_t device, int delayMs = 0);
230 // Mute or unmute all streams handled by the specified strategy on the specified output
231 void setStrategyMute(routing_strategy strategy, bool on, audio_io_handle_t output, int delayMs = 0);
232 // Mute or unmute the stream on the specified output
233 void setStreamMute(int stream, bool on, audio_io_handle_t output, int delayMs = 0);
234 // handle special cases for sonification strategy while in call: mute streams or replace by
235 // a special tone in the device used for communication
236 void handleIncallSonification(int stream, bool starting, bool stateChange);
237 // true is current platform implements a back microphone
238 virtual bool hasBackMicrophone() const { return false; }
241 // true is current platform supports suplication of notifications and ringtones over A2DP output
242 virtual bool a2dpUsedForSonification() const { return true; }
243 status_t handleA2dpConnection(AudioSystem::audio_devices device,
244 const char *device_address);
245 status_t handleA2dpDisconnection(AudioSystem::audio_devices device,
246 const char *device_address);
247 void closeA2dpOutputs();
248 // checks and if necessary changes output (a2dp, duplicated or hardware) used for all strategies.
249 // must be called every time a condition that affects the output choice for a given strategy is
250 // changed: connected device, phone state, force use...
251 // Must be called before updateDeviceForStrategy()
252 void checkOutputForStrategy(routing_strategy strategy);
253 // Same as checkOutputForStrategy() but for a all strategies in order of priority
254 void checkOutputForAllStrategies();
255 // manages A2DP output suspend/restore according to phone state and BT SCO usage
256 void checkA2dpSuspend();
258 // selects the most appropriate device on output for current state
259 // must be called every time a condition that affects the device choice for a given output is
260 // changed: connected device, phone state, force use, output start, output stop..
261 // see getDeviceForStrategy() for the use of fromCache parameter
262 uint32_t getNewDevice(audio_io_handle_t output, bool fromCache = true);
263 // updates cache of device used by all strategies (mDeviceForStrategy[])
264 // must be called every time a condition that affects the device choice for a given strategy is
265 // changed: connected device, phone state, force use...
266 // cached values are used by getDeviceForStrategy() if parameter fromCache is true.
267 // Must be called after checkOutputForAllStrategies()
268 void updateDeviceForStrategy();
269 // true if current platform requires a specific output to be opened for this particular
270 // set of parameters. This function is called by getOutput() and is implemented by platform
271 // specific audio policy manager.
272 virtual bool needsDirectOuput(AudioSystem::stream_type stream,
273 uint32_t samplingRate,
276 AudioSystem::output_flags flags,
278 virtual uint32_t getMaxEffectsCpuLoad();
279 virtual uint32_t getMaxEffectsMemory();
280 #ifdef AUDIO_POLICY_TEST
281 virtual bool threadLoop();
283 int testOutputIndex(audio_io_handle_t output);
284 #endif //AUDIO_POLICY_TEST
286 AudioPolicyClientInterface *mpClientInterface; // audio policy client interface
287 audio_io_handle_t mHardwareOutput; // hardware output handler
288 audio_io_handle_t mA2dpOutput; // A2DP output handler
289 audio_io_handle_t mDuplicatedOutput; // duplicated output handler: outputs to hardware and A2DP.
291 KeyedVector<audio_io_handle_t, AudioOutputDescriptor *> mOutputs; // list of output descriptors
292 KeyedVector<audio_io_handle_t, AudioInputDescriptor *> mInputs; // list of input descriptors
293 uint32_t mAvailableOutputDevices; // bit field of all available output devices
294 uint32_t mAvailableInputDevices; // bit field of all available input devices
295 int mPhoneState; // current phone state
296 uint32_t mRingerMode; // current ringer mode
297 AudioSystem::forced_config mForceUse[AudioSystem::NUM_FORCE_USE]; // current forced use configuration
299 StreamDescriptor mStreams[AudioSystem::NUM_STREAM_TYPES]; // stream descriptors for volume control
300 String8 mA2dpDeviceAddress; // A2DP device MAC address
301 String8 mScoDeviceAddress; // SCO device MAC address
302 nsecs_t mMusicStopTime; // time when last music stream was stopped
303 bool mLimitRingtoneVolume; // limit ringtone volume to music volume if headset connected
304 uint32_t mDeviceForStrategy[NUM_STRATEGIES];
306 // Maximum CPU load allocated to audio effects in 0.1 MIPS (ARMv5TE, 0 WS memory) units
307 static const uint32_t MAX_EFFECTS_CPU_LOAD = 1000;
308 // Maximum memory allocated to audio effects in KB
309 static const uint32_t MAX_EFFECTS_MEMORY = 512;
310 uint32_t mTotalEffectsCpuLoad; // current CPU load used by effects
311 uint32_t mTotalEffectsMemory; // current memory used by effects
312 KeyedVector<int, EffectDescriptor *> mEffects; // list of registered audio effects
313 bool mA2dpSuspended; // true if A2DP output is suspended
315 #ifdef AUDIO_POLICY_TEST
317 Condition mWaitWorkCV;
321 audio_io_handle_t mTestOutputs[NUM_TEST_OUTPUTS];
323 uint32_t mTestDevice;
324 uint32_t mTestSamplingRate;
325 uint32_t mTestFormat;
326 uint32_t mTestChannels;
327 uint32_t mTestLatencyMs;
328 #endif //AUDIO_POLICY_TEST