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/*
* Copyright (C) 2022 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.
*/
#include <memory>
#define LOG_TAG "AHAL_EffectThread"
#include <android-base/logging.h>
#include <pthread.h>
#include <sys/resource.h>
#include "effect-impl/EffectThread.h"
namespace aidl::android::hardware::audio::effect {
EffectThread::EffectThread() {
LOG(DEBUG) << __func__;
}
EffectThread::~EffectThread() {
destroyThread();
LOG(DEBUG) << __func__ << " done";
};
RetCode EffectThread::createThread(std::shared_ptr<EffectContext> context, const std::string& name,
int priority, int sleepUs /* kSleepTimeUs */) {
if (mThread.joinable()) {
LOG(WARNING) << "-" << mName << "-" << __func__ << " thread already created, no-op";
return RetCode::SUCCESS;
}
mName = name;
mPriority = priority;
mSleepTimeUs = sleepUs;
{
std::lock_guard lg(mThreadMutex);
mThreadContext = std::move(context);
}
mThread = std::thread(&EffectThread::threadLoop, this);
LOG(DEBUG) << "-" << mName << "-" << __func__ << " priority " << mPriority << " done";
return RetCode::SUCCESS;
}
RetCode EffectThread::destroyThread() {
{
std::lock_guard lg(mThreadMutex);
mStop = mExit = true;
}
mCv.notify_one();
if (mThread.joinable()) {
mThread.join();
}
{
std::lock_guard lg(mThreadMutex);
mThreadContext.reset();
}
LOG(DEBUG) << "-" << mName << "-" << __func__ << " done";
return RetCode::SUCCESS;
}
RetCode EffectThread::startThread() {
return handleStartStop(false /* stop */);
}
RetCode EffectThread::stopThread() {
return handleStartStop(true /* stop */);
}
RetCode EffectThread::handleStartStop(bool stop) {
if (!mThread.joinable()) {
LOG(ERROR) << "-" << mName << "-" << __func__ << ": "
<< " thread already destroyed";
return RetCode::ERROR_THREAD;
}
{
std::lock_guard lg(mThreadMutex);
if (stop == mStop) {
LOG(WARNING) << "-" << mName << "-" << __func__ << ": "
<< " already " << (stop ? "stop" : "start");
return RetCode::SUCCESS;
}
mStop = stop;
}
mCv.notify_one();
LOG(DEBUG) << ": " << mName << (stop ? " stop done" : " start done");
return RetCode::SUCCESS;
}
void EffectThread::threadLoop() {
pthread_setname_np(pthread_self(), mName.substr(0, kMaxTaskNameLen - 1).c_str());
setpriority(PRIO_PROCESS, 0, mPriority);
while (true) {
std::unique_lock l(mThreadMutex);
::android::base::ScopedLockAssertion lock_assertion(mThreadMutex);
mCv.wait(l, [&]() REQUIRES(mThreadMutex) { return mExit || !mStop; });
if (mExit) {
LOG(WARNING) << __func__ << " EXIT!";
return;
}
process_l();
}
}
void EffectThread::process_l() {
RETURN_VALUE_IF(!mThreadContext, void(), "nullContext");
std::shared_ptr<EffectContext::StatusMQ> statusMQ = mThreadContext->getStatusFmq();
std::shared_ptr<EffectContext::DataMQ> inputMQ = mThreadContext->getInputDataFmq();
std::shared_ptr<EffectContext::DataMQ> outputMQ = mThreadContext->getOutputDataFmq();
auto buffer = mThreadContext->getWorkBuffer();
// Only this worker will read from input data MQ and write to output data MQ.
auto readSamples = inputMQ->availableToRead(), writeSamples = outputMQ->availableToWrite();
if (readSamples && writeSamples) {
auto processSamples = std::min(readSamples, writeSamples);
LOG(DEBUG) << "-" << mName << "-" << __func__ << ": "
<< " available to read " << readSamples << " available to write " << writeSamples
<< " process " << processSamples;
inputMQ->read(buffer, processSamples);
IEffect::Status status = effectProcessImpl(buffer, buffer, processSamples);
outputMQ->write(buffer, status.fmqProduced);
statusMQ->writeBlocking(&status, 1);
LOG(DEBUG) << "-" << mName << "-" << __func__ << ": "
<< " done processing, effect consumed " << status.fmqConsumed << " produced "
<< status.fmqProduced;
} else {
usleep(mSleepTimeUs);
}
}
} // namespace aidl::android::hardware::audio::effect
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