| /* |
| * Copyright (C) 2021 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. |
| */ |
| |
| package com.android.server.soundtrigger_middleware; |
| |
| import android.annotation.NonNull; |
| import android.media.soundtrigger.ModelParameterRange; |
| import android.media.soundtrigger.PhraseSoundModel; |
| import android.media.soundtrigger.Properties; |
| import android.media.soundtrigger.RecognitionConfig; |
| import android.media.soundtrigger.SoundModel; |
| import android.media.soundtrigger.Status; |
| import android.os.IBinder; |
| |
| /** |
| * This is a decorator around ISoundTriggerHal, which implements enforcement of the maximum number |
| * of models supported by the HAL, for HAL implementations older than V2.4 that do not support |
| * rejection of model loading at the HAL layer. |
| * Since preemptive model unloading has been introduced in V2.4, it should never be used in |
| * conjunction with this class, hence we don't bother considering preemtive unloading when counting |
| * the number of currently loaded models. |
| */ |
| public class SoundTriggerHalMaxModelLimiter implements ISoundTriggerHal { |
| private final @NonNull ISoundTriggerHal mDelegate; |
| private final int mMaxModels; |
| |
| // This counter is used to enforce the maximum number of loaded models. |
| private int mNumLoadedModels = 0; |
| |
| private GlobalCallback mGlobalCallback; |
| |
| public SoundTriggerHalMaxModelLimiter( |
| ISoundTriggerHal delegate, int maxModels) { |
| mDelegate = delegate; |
| this.mMaxModels = maxModels; |
| } |
| |
| @Override |
| public void reboot() { |
| mDelegate.reboot(); |
| } |
| |
| @Override |
| public void detach() { |
| mDelegate.detach(); |
| } |
| |
| @Override |
| public Properties getProperties() { |
| return mDelegate.getProperties(); |
| } |
| |
| @Override |
| public void registerCallback(GlobalCallback callback) { |
| mGlobalCallback = callback; |
| mDelegate.registerCallback(mGlobalCallback); |
| } |
| |
| @Override |
| public int loadSoundModel(SoundModel soundModel, ModelCallback callback) { |
| synchronized (this) { |
| if (mNumLoadedModels == mMaxModels) { |
| throw new RecoverableException(Status.RESOURCE_CONTENTION); |
| } |
| int result = mDelegate.loadSoundModel(soundModel, callback); |
| ++mNumLoadedModels; |
| return result; |
| } |
| } |
| |
| @Override |
| public int loadPhraseSoundModel(PhraseSoundModel soundModel, |
| ModelCallback callback) { |
| synchronized (this) { |
| if (mNumLoadedModels == mMaxModels) { |
| throw new RecoverableException(Status.RESOURCE_CONTENTION); |
| } |
| int result = mDelegate.loadPhraseSoundModel(soundModel, callback); |
| ++mNumLoadedModels; |
| return result; |
| } |
| } |
| |
| @Override |
| public void unloadSoundModel(int modelHandle) { |
| boolean wasAtMaxCapacity; |
| synchronized (this) { |
| wasAtMaxCapacity = mNumLoadedModels-- == mMaxModels; |
| } |
| try { |
| mDelegate.unloadSoundModel(modelHandle); |
| } catch (Exception e) { |
| synchronized (this) { |
| ++mNumLoadedModels; |
| } |
| throw e; |
| } |
| if (wasAtMaxCapacity) { |
| // It is legal to invoke callbacks from within unloadSoundModel(). |
| // See README.md for details. |
| mGlobalCallback.onResourcesAvailable(); |
| } |
| } |
| |
| @Override |
| public void stopRecognition(int modelHandle) { |
| mDelegate.stopRecognition(modelHandle); |
| } |
| |
| @Override |
| public void startRecognition(int modelHandle, int deviceHandle, int ioHandle, |
| RecognitionConfig config) { |
| mDelegate.startRecognition(modelHandle, deviceHandle, ioHandle, config); |
| } |
| |
| @Override |
| public void forceRecognitionEvent(int modelHandle) { |
| mDelegate.forceRecognitionEvent(modelHandle); |
| } |
| |
| @Override |
| public int getModelParameter(int modelHandle, int param) { |
| return mDelegate.getModelParameter(modelHandle, param); |
| } |
| |
| @Override |
| public void setModelParameter(int modelHandle, int param, int value) { |
| mDelegate.setModelParameter(modelHandle, param, value); |
| } |
| |
| @Override |
| public ModelParameterRange queryParameter(int modelHandle, int param) { |
| return mDelegate.queryParameter(modelHandle, param); |
| } |
| |
| @Override |
| public void linkToDeath(IBinder.DeathRecipient recipient) { |
| mDelegate.linkToDeath(recipient); |
| } |
| |
| @Override |
| public void unlinkToDeath(IBinder.DeathRecipient recipient) { |
| mDelegate.unlinkToDeath(recipient); |
| } |
| |
| @Override |
| public String interfaceDescriptor() { |
| return mDelegate.interfaceDescriptor(); |
| } |
| |
| @Override |
| public void flushCallbacks() { |
| mDelegate.flushCallbacks(); |
| } |
| |
| @Override |
| public void clientAttached(IBinder binder) { |
| mDelegate.clientAttached(binder); |
| } |
| |
| @Override |
| public void clientDetached(IBinder binder) { |
| mDelegate.clientDetached(binder); |
| } |
| } |