/******************************************************************************
/
/       File:                   CC.h
/
/       Description:    Closed caption module.
/
/       Copyright 2001, Carlos Hasan
/
*******************************************************************************/

#ifndef __CC_H__
#define __CC_H__

#include "Capture.h"

enum cc_mode {
        C_RADEON_CC1    = 0,
        C_RADEON_CC2    = 1,
        C_RADEON_CC3    = 2,
        C_RADEON_CC4    = 3
};

enum cc_window {
        C_RADEON_CC_VBI_LINE_WIDTH      = 2048,
        C_RADEON_CC_BLANK_START         = 4*112,
        C_RADEON_CC_VBI_LINE_NUMBER     = 19,
        C_RADEON_CC_BIT_DURATION        = 56,
        C_RADEON_CC_BITS_PER_FIELD      = 16,
        C_RADEON_CC_LEVEL_THRESHOLD = 32,

        C_RADEON_CC_LINE                        = 21,
        
        C_RADEON_CC_CHANNELS            = 4,
        C_RADEON_CC_ROWS                        = 15,
        C_RADEON_CC_COLUMNS                     = 32
};
        
class CCaption {
public:
        CCaption(CCapture & capture);
        
        ~CCaption();
        
        status_t InitCheck() const;

        void SetMode(cc_mode mode);

        bool Decode(const unsigned char * buffer0,
                                const unsigned char * buffer1);

private:
        bool DecodeBits(const unsigned char * buffer, int & data);
        
        void DisplayCaptions() const;
        
private:
        CCapture & fCapture;
        cc_mode fChannel;
        int fRow;
        int fColumn;
        int fColor;
        int fLastControlCode;
        short fText[C_RADEON_CC_ROWS][C_RADEON_CC_COLUMNS];
        short fDisplayText[C_RADEON_CC_ROWS][C_RADEON_CC_COLUMNS];
};

#endif