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/* audiodevs: Abstraction layer for audio hardware & samples
Copyright (C) 2003-2004 Nemosoft Unv.
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 2 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, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
For questions, remarks, patches, etc. for this program, the author can be
reached at camstream@smcc.demon.nl.
*/
#ifndef AUDIOSAMPLE_HPP
#define AUDIOSAMPLE_HPP
#include <qshared.h>
#include "SoundAttributes.h"
typedef unsigned long SamplePos;
class CAudioSample
{
private:
void Init();
void ReInit();
void Reset();
void CalculateOffsets() const;
protected:
struct SampleData: public QShared // internal
{
SoundAttributes Attributes;
int BytesPerSample;
int PositionOffset[SoundAttributes::MaxPosition]; ///< Mapping from channel to memory offset in raw stream
void *pMemBuffer; ///< All classes use a memory buffer
SamplePos BufLength; ///< Buffer Length in samples
SamplePos BufStartOffset; ///< In case this is a portion of a larger sample(stream), this is the position within that sample
} *m_pData;
CAudioSample(const SoundAttributes &attrs, SamplePos buffer_length);
void SetSoundAttributes(const SoundAttributes &) const;
int GetBytesPerSample() const;
bool CreateBuffer(const SoundAttributes &attrs, SamplePos buffer_length);
// ResizeBuffer(SamplePos buffer_length);
void Detach();
public:
CAudioSample();
CAudioSample(const CAudioSample &);
virtual ~CAudioSample();
CAudioSample &operator =(const CAudioSample &audio_sample);
//CAudioSample Copy() const;
SoundAttributes GetSoundAttributes() const;
bool IsNull() const;
virtual SamplePos TotalLength() const;
virtual bool CanSeek() const;
virtual bool SeekTo(SamplePos offset);
virtual int GetValue(SamplePos offset, SoundAttributes::Position channel) const;
virtual void SetValue(SamplePos offset, SoundAttributes::Position channel, int value);
};
#endif
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