src/add-ons/media/media-add-ons/radeon/CC.h

   1 /******************************************************************************
   2 /
   3 /       File:                   CC.h
   4 /
   5 /       Description:    Closed caption module.
   6 /
   7 /       Copyright 2001, Carlos Hasan
   8 /
   9 *******************************************************************************/
  10
  11 #ifndef __CC_H__
  12 #define __CC_H__
  13
  14 #include "Capture.h"
  15
  16 enum cc_mode {
  17         C_RADEON_CC1    = 0,
  18         C_RADEON_CC2    = 1,
  19         C_RADEON_CC3    = 2,
  20         C_RADEON_CC4    = 3
  21 };
  22
  23 enum cc_window {
  24         C_RADEON_CC_VBI_LINE_WIDTH      = 2048,
  25         C_RADEON_CC_BLANK_START         = 4*112,
  26         C_RADEON_CC_VBI_LINE_NUMBER     = 19,
  27         C_RADEON_CC_BIT_DURATION        = 56,
  28         C_RADEON_CC_BITS_PER_FIELD      = 16,
  29         C_RADEON_CC_LEVEL_THRESHOLD = 32,
  30
  31         C_RADEON_CC_LINE                        = 21,
  32
  33         C_RADEON_CC_CHANNELS            = 4,
  34         C_RADEON_CC_ROWS                        = 15,
  35         C_RADEON_CC_COLUMNS                     = 32
  36 };
  37
  38 class CCaption {
  39 public:
  40         CCaption(CCapture & capture);
  41
  42         ~CCaption();
  43
  44         status_t InitCheck() const;
  45
  46         void SetMode(cc_mode mode);
  47
  48         bool Decode(const unsigned char * buffer0,
  49                                 const unsigned char * buffer1);
  50
  51 private:
  52         bool DecodeBits(const unsigned char * buffer, int & data);
  53
  54         void DisplayCaptions() const;
  55
  56 private:
  57         CCapture & fCapture;
  58         cc_mode fChannel;
  59         int fRow;
  60         int fColumn;
  61         int fColor;
  62         int fLastControlCode;
  63         short fText[C_RADEON_CC_ROWS][C_RADEON_CC_COLUMNS];
  64         short fDisplayText[C_RADEON_CC_ROWS][C_RADEON_CC_COLUMNS];
  65 };
  66
  67 #endif