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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the demonstration applications of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef __GE_IGA_AUDIOBUFFER__
#define __GE_IGA_AUDIOBUFFER__
#include <QFile>
#include "GEInterfaces.h"
namespace GE {
class CAudioBufferPlayInstance;
class CAudioBuffer; // forward declaration
typedef AUDIO_SAMPLE_TYPE(*SAMPLE_FUNCTION_TYPE)(CAudioBuffer *abuffer, int pos, int channel);
class CAudioBuffer { // container for a sound
public:
CAudioBuffer();
virtual ~CAudioBuffer();
static CAudioBuffer* loadWav( QString fileName );
static CAudioBuffer* loadWav( FILE *wavFile ); // support for stdio
void reallocate( int length );
inline void* getRawData() { return m_data; }
inline int getDataLength() { return m_dataLength; }
inline int getBytesPerSample() { return (m_bitsPerSample>>3); }
inline int getBitsPerSample() { return m_bitsPerSample; }
inline int getSamplesPerSec() { return m_samplesPerSec; }
inline short getNofChannels() { return m_nofChannels; }
inline SAMPLE_FUNCTION_TYPE getSampleFunction() { return m_sampleFunction; }
// static implementations of sample functions
static AUDIO_SAMPLE_TYPE sampleFunction8bitMono( CAudioBuffer *abuffer, int pos, int channel );
static AUDIO_SAMPLE_TYPE sampleFunction16bitMono( CAudioBuffer *abuffer, int pos, int channel );
static AUDIO_SAMPLE_TYPE sampleFunction8bitStereo( CAudioBuffer *abuffer, int pos, int channel );
static AUDIO_SAMPLE_TYPE sampleFunction16bitStereo( CAudioBuffer *abuffer, int pos, int channel );
CAudioBufferPlayInstance *playWithMixer( GE::CAudioMixer &mixer );
protected:
SAMPLE_FUNCTION_TYPE m_sampleFunction;
short m_nofChannels;
void *m_data;
int m_dataLength; // in bytes
short m_bitsPerSample;
bool m_signedData;
int m_samplesPerSec;
};
class CAudioBufferPlayInstance : public IAudioSource {
public:
CAudioBufferPlayInstance();
CAudioBufferPlayInstance( CAudioBuffer *start_playing );
virtual ~CAudioBufferPlayInstance();
void playBuffer( CAudioBuffer *startPlaying, float volume, float fixedSpeed, int loopTimes = 0 ); // looptimes -1 = loop forever
void setSpeed( float speed );
void setLeftVolume( float lvol );
void setRightVolume( float rvol );
inline void setLoopTimes( int ltimes ) { m_loopTimes = ltimes; }
void stop();
int pullAudio( AUDIO_SAMPLE_TYPE *target, int bufferLength );
bool canBeDestroyed();
bool isPlaying() { if (m_buffer) return true; else return false; }
inline bool isFinished() { return m_finished; }
inline bool destroyWhenFinished() { return m_destroyWhenFinished; }
inline void setDestroyWhenFinished( bool set ) { m_destroyWhenFinished = set; }
protected:
int mixBlock( AUDIO_SAMPLE_TYPE *target, int bufferLength );
bool m_finished;
bool m_destroyWhenFinished;
int m_fixedPos;
int m_fixedInc;
int m_fixedLeftVolume;
int m_fixedRightVolume;
int m_fixedCenter;
int m_loopTimes;
CAudioBuffer *m_buffer;
};
};
#endif
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