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117 lines
4.0 KiB
117 lines
4.0 KiB
/*
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* Copyright (C) 2019 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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//#define LOG_NDEBUG 0
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#define LOG_TAG "SoundPool::SoundDecoder"
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#include "utils/Log.h"
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#include "SoundDecoder.h"
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namespace android::soundpool {
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// Maximum Samples that can be background decoded before we block the caller.
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static constexpr size_t kMaxQueueSize = 128;
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// The amount of time we wait for a new Sound decode request
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// before the SoundDecoder thread closes.
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static constexpr int32_t kWaitTimeBeforeCloseMs = 1000;
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SoundDecoder::SoundDecoder(SoundManager* soundManager, size_t threads)
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: mSoundManager(soundManager)
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{
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ALOGV("%s(%p, %zu)", __func__, soundManager, threads);
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// ThreadPool is created, but we don't launch any threads.
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mThreadPool = std::make_unique<ThreadPool>(
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std::min(threads, (size_t)std::thread::hardware_concurrency()),
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"SoundDecoder_");
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}
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SoundDecoder::~SoundDecoder()
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{
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ALOGV("%s()", __func__);
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quit();
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}
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void SoundDecoder::quit()
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{
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ALOGV("%s()", __func__);
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{
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std::lock_guard lock(mLock);
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mQuit = true;
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mQueueSpaceAvailable.notify_all(); // notify all load waiters
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mQueueDataAvailable.notify_all(); // notify all worker threads
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}
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mThreadPool->quit();
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}
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void SoundDecoder::run(int32_t id)
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{
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ALOGV("%s(%d): entering", __func__, id);
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std::unique_lock lock(mLock);
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while (!mQuit) {
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if (mSoundIDs.size() == 0) {
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ALOGV("%s(%d): waiting", __func__, id);
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mQueueDataAvailable.wait_for(
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lock, std::chrono::duration<int32_t, std::milli>(kWaitTimeBeforeCloseMs));
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if (mSoundIDs.size() == 0) {
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break; // no new sound, exit this thread.
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}
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continue;
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}
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const int32_t soundID = mSoundIDs.front();
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mSoundIDs.pop_front();
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mQueueSpaceAvailable.notify_one();
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ALOGV("%s(%d): processing soundID: %d size: %zu", __func__, id, soundID, mSoundIDs.size());
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lock.unlock();
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std::shared_ptr<Sound> sound = mSoundManager->findSound(soundID);
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status_t status = NO_INIT;
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if (sound.get() != nullptr) {
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status = sound->doLoad();
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}
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ALOGV("%s(%d): notifying loaded soundID:%d status:%d", __func__, id, soundID, status);
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mSoundManager->notify(SoundPoolEvent(SoundPoolEvent::SOUND_LOADED, soundID, status));
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lock.lock();
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}
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ALOGV("%s(%d): exiting", __func__, id);
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}
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void SoundDecoder::loadSound(int32_t soundID)
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{
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ALOGV("%s(%d)", __func__, soundID);
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size_t pendingSounds;
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{
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std::unique_lock lock(mLock);
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while (mSoundIDs.size() == kMaxQueueSize) {
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if (mQuit) return;
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ALOGV("%s: waiting soundID: %d size: %zu", __func__, soundID, mSoundIDs.size());
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mQueueSpaceAvailable.wait(lock);
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}
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if (mQuit) return;
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mSoundIDs.push_back(soundID);
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mQueueDataAvailable.notify_one();
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ALOGV("%s: adding soundID: %d size: %zu", __func__, soundID, mSoundIDs.size());
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pendingSounds = mSoundIDs.size();
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}
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// Launch threads as needed. The "as needed" is weakly consistent as we release mLock.
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if (pendingSounds > mThreadPool->getActiveThreadCount()) {
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const int32_t id = mThreadPool->launch([this](int32_t id) { run(id); });
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(void)id; // avoid clang warning -Wunused-variable -Wused-but-marked-unused
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ALOGV_IF(id != 0, "%s: launched thread %d", __func__, id);
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}
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}
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} // end namespace android::soundpool
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