103 lines
4.2 KiB
C
103 lines
4.2 KiB
C
/*----------------------------------------------------------------------+
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| compress.h - Microsoft Video 1 Compressor - compress header file |
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| Copyright (c) 1990-1994 Microsoft Corporation. |
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| Portions Copyright Media Vision Inc. |
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| All Rights Reserved. |
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| You have a non-exclusive, worldwide, royalty-free, and perpetual |
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| license to use this source code in developing hardware, software |
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| (limited to drivers and other software required for hardware |
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| functionality), and firmware for video display and/or processing |
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| boards. Microsoft makes no warranties, express or implied, with |
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| respect to the Video 1 codec, including without limitation warranties |
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| of merchantability or fitness for a particular purpose. Microsoft |
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| shall not be liable for any damages whatsoever, including without |
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| limitation consequential damages arising from your use of the Video 1 |
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| codec. |
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+----------------------------------------------------------------------*/
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/*******************************************************************
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encoding a skip - if the mask (first word) has the high bit set
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then it is either a skip cell code, or a solid color code.
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you can't encode a r=01 solid color, this is how we tell a skip
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from a solid (not a big loss)
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*******************************************************************/
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#define SKIP_MAX SKIP_MASK
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#define SKIP_MASK ((1<<10)-1)
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#define MAGIC_MASK ~SKIP_MASK
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#define SKIP_MAGIC 0x8400 // r=01
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#define SOLID_MAGIC 0x8000
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#define MASK_MAGIC 0xA000
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/*******************************************************************
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*******************************************************************/
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extern DWORD numberOfBlocks;
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extern DWORD numberOfSolids;
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extern DWORD numberOfSolid4;
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extern DWORD numberOfEdges;
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extern DWORD numberOfSkips;
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extern DWORD numberOfSkipCodes;
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/*******************************************************************
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*******************************************************************/
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//
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// this is a CELL (4x4) array of RGBQUADs
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//
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typedef RGBQUAD CELL[HEIGHT_CBLOCK * WIDTH_CBLOCK];
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typedef RGBQUAD *PCELL;
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typedef struct _CELLS {
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CELL cell;
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CELL cellT;
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CELL cellPrev;
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} CELLS;
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typedef CELLS * PCELLS;
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/*******************************************************************
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routine: CompressFrame
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purp: compress a frame
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returns: number of bytes in compressed buffer
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*******************************************************************/
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DWORD FAR CompressFrame16(LPBITMAPINFOHEADER lpbi, // DIB header to compress
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LPVOID lpBits, // DIB bits to compress
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LPVOID lpData, // put compressed data here
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DWORD threshold, // edge threshold
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DWORD thresholdInter, // inter-frame threshold
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LPBITMAPINFOHEADER lpbiPrev, // previous frame
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LPVOID lpPrev, // previous frame
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LONG (CALLBACK *Status) (LPARAM lParam, UINT message, LONG l),
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LONG lParam,
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PCELLS pCells);
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DWORD FAR CompressFrame8(LPBITMAPINFOHEADER lpbi, // DIB header to compress
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LPVOID lpBits, // DIB bits to compress
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LPVOID lpData, // put compressed data here
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DWORD threshold, // edge threshold
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DWORD thresholdInter, // inter-frame threshold
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LPBITMAPINFOHEADER lpbiPrev, // previous frame
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LPVOID lpPrev, // previous frame
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LONG (CALLBACK *Status) (LPARAM lParam, UINT message, LONG l),
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LONG lParam,
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PCELLS pCells,
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LPBYTE lpITable,
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RGBQUAD *prgbqOut);
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DWORD FAR CompressFrameBegin(LPBITMAPINFOHEADER lpbiIn, LPBITMAPINFOHEADER lpbiOut,
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LPBYTE *lplpITable, RGBQUAD *prgbIn);
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DWORD FAR CompressFrameEnd(LPBYTE *lplpITable);
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void FAR CompressFrameFree(void);
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DWORD FAR QualityToThreshold(DWORD dwQuality);
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