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/***************************************************************************
* Copyright 2010 Stefan Majewsky <majewsky@gmx.net> *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU Library General Public License *
* version 2 as published by the Free Software Foundation *
* *
* 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 Library General Public License for more details. *
* *
* You should have received a copy of the GNU Library General Public *
* License along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
***************************************************************************/
#include "kgaudioscene.h"
#include "kgopenalruntime_p.h"
#include <QDebug>
#include <QGlobalStatic>
Q_GLOBAL_STATIC(KgOpenALRuntime, g_runtime)
//BEGIN KgAudioScene
KgAudioScene::Capabilities KgAudioScene::capabilities()
{
return SupportsLowLatencyPlayback | SupportsPositionalPlayback;
}
QPointF KgAudioScene::listenerPos()
{
return g_runtime->m_listenerPos;
}
void KgAudioScene::setListenerPos(const QPointF& pos)
{
if (g_runtime->m_listenerPos != pos)
{
g_runtime->m_listenerPos = pos;
g_runtime->configureListener();
}
}
qreal KgAudioScene::volume()
{
return g_runtime->m_volume;
}
void KgAudioScene::setVolume(qreal volume)
{
if (g_runtime->m_volume != volume)
{
g_runtime->m_volume = volume;
g_runtime->configureListener();
}
}
bool KgAudioScene::hasError()
{
return g_runtime->m_error;
}
//END KgAudioScene
//BEGIN KgOpenALRuntime
KgOpenALRuntime::KgOpenALRuntime()
: m_volume(1)
, m_error(false)
, m_context(nullptr)
, m_device(alcOpenDevice(""))
{
if (!m_device)
{
qWarning() << "Failed to create OpenAL device";
m_error = true;
return;
}
m_context = alcCreateContext(m_device, nullptr);
int error = alcGetError(m_device);
if (error != AL_NO_ERROR)
{
qWarning() << "Failed to create OpenAL context: Error code" << error;
m_error = true;
return;
}
alcMakeContextCurrent(m_context);
configureListener();
}
KgOpenALRuntime::~KgOpenALRuntime()
{
if (m_context == alcGetCurrentContext())
{
alcMakeContextCurrent(nullptr);
}
alcDestroyContext(m_context);
alcCloseDevice(m_device);
}
KgOpenALRuntime* KgOpenALRuntime::instance()
{
return g_runtime;
}
void KgOpenALRuntime::configureListener()
{
int error; alGetError(); //clear error cache
alListener3f(AL_POSITION, m_listenerPos.x(), m_listenerPos.y(), 0);
alListenerf(AL_GAIN, m_volume);
if ((error = alGetError()) != AL_NO_ERROR)
{
qWarning() << "Failed to setup OpenAL listener: Error code" << error;
m_error = true;
}
}
//END KgOpenALRuntime
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