samplebuffer.h

来自「Trolltech公司发布的图形界面操作系统。可在qt-embedded-2.3」· C头文件 代码 · 共 76 行

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#ifndef SAMPLEBUFFER_H
#define SAMPLEBUFFER_H

#include <qglobal.h>


class SampleBuffer
{
public:
    SampleBuffer( unsigned int blockSize, unsigned int maxBlocks = 0 );
    ~SampleBuffer();

    bool nextWriteBuffer( short *& buf, unsigned int& length );
    void commitWriteBuffer ( unsigned int length );
    void rewind();
    bool nextReadBuffer( short *& buf, unsigned int& length );
    void clear();

private:
    struct BufferBlock
    {
	struct BufferBlock *next;
	unsigned int size;
	short data[1];
    };

private:
    BufferBlock *first;
    BufferBlock *readPosn;
    BufferBlock *writePosn;
    unsigned int blockSize;
    unsigned int numBlocks;
    unsigned int maxBlocks;

    void init();
    void clearAll();
};


#endif