156 lines
4.1 KiB
C++
156 lines
4.1 KiB
C++
/***
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Olive - Non-Linear Video Editor
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Copyright (C) 2019 Olive Team
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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***/
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#include "outputmanager.h"
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#include <QDebug>
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#include <QtMath>
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#include <QFile>
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#include "bufferaverage.h"
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OLIVE_NAMESPACE_ENTER
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AudioOutputManager::AudioOutputManager(QObject *parent) :
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QObject(parent),
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output_(nullptr),
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push_device_(nullptr)
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{
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}
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AudioOutputManager::~AudioOutputManager()
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{
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Close();
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}
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void AudioOutputManager::Push(const QByteArray& samples)
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{
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// This function is not queued and is intended to be called from the caller's thread
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QMutexLocker lock(&push_sample_lock_);
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// Replace sample buffer with this one
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push_samples_ = samples;
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push_sample_index_ = 0;
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// If we had another device connected, disconnect it now
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QMetaObject::invokeMethod(this, "ResetToPushMode", Qt::QueuedConnection);
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// Start pushing samples to the output
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QMetaObject::invokeMethod(this, "PushMoreSamples", Qt::QueuedConnection);
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}
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void AudioOutputManager::ResetToPushMode()
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{
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// If we have a null push device, then we currently have the output in pull mode. We restore it to push mode here.
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if (output_ && !push_device_) {
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output_->stop();
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device_proxy_.close();
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// Put QAudioOutput back into push mode
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push_device_ = output_->start();
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}
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}
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void AudioOutputManager::SetParameters(AudioRenderingParams params)
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{
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device_proxy_.SetParameters(params);
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}
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void AudioOutputManager::Close()
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{
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if (output_) {
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output_->stop();
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if (device_proxy_.isOpen()) {
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device_proxy_.close();
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}
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delete output_;
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output_ = nullptr;
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}
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}
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void AudioOutputManager::PullFromDevice(const QString &filename, qint64 offset, int playback_speed)
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{
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if (!output_) {
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return;
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}
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// Stop any current output and disable push mode
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output_->stop();
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push_device_ = nullptr;
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push_samples_.clear();
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// Pull from the device
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device_proxy_.SetDevice(filename, offset, playback_speed);
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device_proxy_.open(QIODevice::ReadOnly);
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output_->start(&device_proxy_);
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}
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void AudioOutputManager::PushMoreSamples()
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{
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QMutexLocker lock(&push_sample_lock_);
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// Check if we're currently in push mode and if we have samples to push
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if (!push_device_ || push_samples_.isEmpty()) {
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return;
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}
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const char* read_ptr = push_samples_.constData() + push_sample_index_;
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// Push the bytes we have to the audio output
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qint64 write_count = push_device_->write(read_ptr,
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push_samples_.size() - push_sample_index_);
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// Increment sample buffer index (faster than shift the bytes up)
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push_sample_index_ += static_cast<int>(write_count);
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// If we've pushed all samples, we can clear this array
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if (push_sample_index_ == push_samples_.size()) {
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push_samples_.clear();
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}
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}
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void AudioOutputManager::SetOutputDevice(QAudioDeviceInfo info, QAudioFormat format)
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{
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// Whatever the output is doing right now, stop it
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Close();
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// Create a new output device and start it in push mode
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output_ = new QAudioOutput(info, format, this);
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output_->setBufferSize(131072);
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output_->setNotifyInterval(1);
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push_device_ = output_->start();
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connect(output_, &QAudioOutput::notify, this, &AudioOutputManager::PushMoreSamples);
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connect(output_, &QAudioOutput::notify, this, &AudioOutputManager::OutputNotified);
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// Un-comment this to get debug information about what the audio output is doing
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//connect(output_, &QAudioOutput::stateChanged, this, &AudioOutputManager::OutputStateChanged);
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}
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void AudioOutputManager::OutputStateChanged(QAudio::State state)
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{
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qDebug() << state << output_->error();
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}
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OLIVE_NAMESPACE_EXIT
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