/***

  Olive - Non-Linear Video Editor
  Copyright (C) 2019 Olive Team

  This program is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program.  If not, see <http://www.gnu.org/licenses/>.

***/

#include "audiomanager.h"

AudioManager* AudioManager::audio_ = nullptr;

void AudioManager::CreateInstance()
{
  if (audio_ == nullptr) {
    audio_ = new AudioManager();
  }
}

void AudioManager::DestroyInstance()
{
  delete audio_;
  audio_ = nullptr;
}

AudioManager *AudioManager::instance()
{
  return audio_;
}

void AudioManager::RefreshDevices()
{
  if (refreshing_devices_) {
    return;
  }

  input_devices_.clear();
  output_devices_.clear();

  refreshing_devices_ = true;

  refresh_thread_.start(QThread::LowPriority);
}

bool AudioManager::IsRefreshing()
{
  return refreshing_devices_;
}

const QList<QAudioDeviceInfo> &AudioManager::ListInputDevices()
{
  return input_devices_;
}

const QList<QAudioDeviceInfo> &AudioManager::ListOutputDevices()
{
  return output_devices_;
}

AudioManager::AudioManager() :
  output_(nullptr),
  refreshing_devices_(false)
{
  RefreshDevices();

  connect(&refresh_thread_, SIGNAL(ListsReady()), this, SLOT(RefreshThreadDone()));
}

void AudioManager::RefreshThreadDone()
{
  output_devices_ = refresh_thread_.output_devices();
  input_devices_ = refresh_thread_.input_devices();

  refreshing_devices_ = false;

  emit DeviceListReady();
}

AudioRefreshDevicesThread::AudioRefreshDevicesThread()
{
}

void AudioRefreshDevicesThread::run()
{
  output_devices_ = QAudioDeviceInfo::availableDevices(QAudio::AudioOutput);
  input_devices_ = QAudioDeviceInfo::availableDevices(QAudio::AudioInput);

  emit ListsReady();
}

const QList<QAudioDeviceInfo>& AudioRefreshDevicesThread::input_devices()
{
  return input_devices_;
}

const QList<QAudioDeviceInfo>& AudioRefreshDevicesThread::output_devices()
{
  return output_devices_;
}