mirror of
https://github.com/Evolution-X/hardware_interfaces
synced 2026-02-01 22:04:26 +00:00
f627d80d37
Avoid locking for all EffectContext calls. Locking inside context seems not necessary for now as all binder calls already serialized. Add BassBoost AIDL placeholder implementation. Bug: 261646550 Test: atest VtsHalAudioEffectTargetTest Change-Id: Iaa41f013d5756801553e20b995aab5ddc845cf32
88 lines
3.3 KiB
C++
88 lines
3.3 KiB
C++
/*
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* Copyright (C) 2022 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <atomic>
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#include <string>
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#include <thread>
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#include <android-base/thread_annotations.h>
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#include <system/thread_defs.h>
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#include "effect-impl/EffectContext.h"
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#include "effect-impl/EffectTypes.h"
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namespace aidl::android::hardware::audio::effect {
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class EffectThread {
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public:
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// default priority is same as HIDL: ANDROID_PRIORITY_URGENT_AUDIO
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EffectThread();
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virtual ~EffectThread();
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// called by effect implementation.
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RetCode createThread(std::shared_ptr<EffectContext> context, const std::string& name,
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const int priority = ANDROID_PRIORITY_URGENT_AUDIO);
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RetCode destroyThread();
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RetCode startThread();
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RetCode stopThread();
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// Will call process() in a loop if the thread is running.
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void threadLoop();
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/**
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* @brief effectProcessImpl is running in worker thread which created in EffectThread.
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*
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* Effect implementation should think about concurrency in the implementation if necessary.
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* Parameter setting usually implemented in context (derived from EffectContext), and some
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* parameter maybe used in the processing, then effect implementation should consider using a
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* mutex to protect these parameter.
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*
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* EffectThread will make sure effectProcessImpl only be called after startThread() successful
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* and before stopThread() successful.
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*
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* @param in address of input float buffer.
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* @param out address of output float buffer.
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* @param samples number of samples to process.
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* @return IEffect::Status
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*/
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virtual IEffect::Status effectProcessImpl(float* in, float* out, int samples) = 0;
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/**
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* The default EffectThread::process() implementation doesn't need to lock. It will only
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* access the FMQ and mWorkBuffer in EffectContext, since they will only be changed in
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* EffectImpl IEffect::open() (in this case EffectThread just created and not running yet) and
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* IEffect::command(CommandId::RESET) (in this case EffectThread already stopped).
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*
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* process() call effectProcessImpl for effect processing, and because effectProcessImpl is
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* implemented by effects, process() must not hold lock before call into effectProcessImpl to
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* avoid deadlock.
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*/
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virtual void process();
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private:
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const int kMaxTaskNameLen = 15;
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std::mutex mThreadMutex;
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std::condition_variable mCv;
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bool mExit GUARDED_BY(mThreadMutex) = false;
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bool mStop GUARDED_BY(mThreadMutex) = true;
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std::shared_ptr<EffectContext> mThreadContext GUARDED_BY(mThreadMutex);
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std::thread mThread;
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int mPriority;
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std::string mName;
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};
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} // namespace aidl::android::hardware::audio::effect
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