*  ICDecompressEx()
 *
 *  decompress a single frame
 *
 */
static __inline LRESULT VFWAPI
ICDecompressEx(
            HIC hic,
            DWORD dwFlags,
            LPBITMAPINFOHEADER lpbiSrc,
            LPVOID lpSrc,
            int xSrc,
            int ySrc,
            int dxSrc,
            int dySrc,
            LPBITMAPINFOHEADER lpbiDst,
            LPVOID lpDst,
            int xDst,
            int yDst,
            int dxDst,
            int dyDst)
{
    ICDECOMPRESSEX ic;

    ic.dwFlags = dwFlags;
    ic.lpbiSrc = lpbiSrc;
    ic.lpSrc = lpSrc;
    ic.xSrc = xSrc;
    ic.ySrc = ySrc;
    ic.dxSrc = dxSrc;
    ic.dySrc = dySrc;
    ic.lpbiDst = lpbiDst;
    ic.lpDst = lpDst;
    ic.xDst = xDst;
    ic.yDst = yDst;
    ic.dxDst = dxDst;
    ic.dyDst = dyDst;

    // note that ICM swaps round the length and pointer
    // length in lparam2, pointer in lparam1
    return ICSendMessage(hic, ICM_DECOMPRESSEX, (DWORD)&ic, sizeof(ic));
}

/*
 *  ICDecompressExBegin()
 *
 *  start compression from a source format (lpbiInput) to a dest
 *  format (lpbiOutput) is supported.
 *
 */
static __inline LRESULT VFWAPI
ICDecompressExBegin(
            HIC hic,
            DWORD dwFlags,
            LPBITMAPINFOHEADER lpbiSrc,
            LPVOID lpSrc,
            int xSrc,
            int ySrc,
            int dxSrc,
            int dySrc,
            LPBITMAPINFOHEADER lpbiDst,
            LPVOID lpDst,
            int xDst,
            int yDst,
            int dxDst,
            int dyDst)
{
    ICDECOMPRESSEX ic;

    ic.dwFlags = dwFlags;
    ic.lpbiSrc = lpbiSrc;
    ic.lpSrc = lpSrc;
    ic.xSrc = xSrc;
    ic.ySrc = ySrc;
    ic.dxSrc = dxSrc;
    ic.dySrc = dySrc;
    ic.lpbiDst = lpbiDst;
    ic.lpDst = lpDst;
    ic.xDst = xDst;
    ic.yDst = yDst;
    ic.dxDst = dxDst;
    ic.dyDst = dyDst;

    // note that ICM swaps round the length and pointer
    // length in lparam2, pointer in lparam1
    return ICSendMessage(hic, ICM_DECOMPRESSEX_BEGIN, (DWORD)&ic, sizeof(ic));
}

/*
 *  ICDecompressExQuery()
 *
 */
static __inline LRESULT VFWAPI
ICDecompressExQuery(
            HIC hic,
            DWORD dwFlags,
            LPBITMAPINFOHEADER lpbiSrc,
            LPVOID lpSrc,
            int xSrc,
            int ySrc,
            int dxSrc,
            int dySrc,
            LPBITMAPINFOHEADER lpbiDst,
            LPVOID lpDst,
            int xDst,
            int yDst,
            int dxDst,
            int dyDst)
{
    ICDECOMPRESSEX ic;

    ic.dwFlags = dwFlags;
    ic.lpbiSrc = lpbiSrc;
    ic.lpSrc = lpSrc;
    ic.xSrc = xSrc;
    ic.ySrc = ySrc;
    ic.dxSrc = dxSrc;
    ic.dySrc = dySrc;
    ic.lpbiDst = lpbiDst;
    ic.lpDst = lpDst;
    ic.xDst = xDst;
    ic.yDst = yDst;
    ic.dxDst = dxDst;
    ic.dyDst = dyDst;

    // note that ICM swaps round the length and pointer
    // length in lparam2, pointer in lparam1
    return ICSendMessage(hic, ICM_DECOMPRESSEX_QUERY, (DWORD)&ic, sizeof(ic));
}

#define ICDecompressExEnd(hic) \
    ICSendMessage(hic, ICM_DECOMPRESSEX_END, 0, 0)

/************************************************************************

    drawing functions

************************************************************************/

/*
 *  ICDrawBegin()
 *
 *  start decompressing data with format (lpbiInput) directly to the screen
 *
 *  return zero if the decompressor supports drawing.
 *
 */

#define ICDRAW_QUERY        0x00000001L   // test for support
#define ICDRAW_FULLSCREEN   0x00000002L   // draw to full screen
#define ICDRAW_HDC          0x00000004L   // draw to a HDC/HWND

DWORD VFWAPIV ICDrawBegin(
        HIC                 hic,
        DWORD               dwFlags,        // flags
        HPALETTE            hpal,           // palette to draw with
        HWND                hwnd,           // window to draw to
        HDC                 hdc,            // HDC to draw to
        int                 xDst,           // destination rectangle
        int                 yDst,
        int                 dxDst,
        int                 dyDst,
        LPBITMAPINFOHEADER  lpbi,           // format of frame to draw
        int                 xSrc,           // source rectangle
        int                 ySrc,
        int                 dxSrc,
        int                 dySrc,
        DWORD               dwRate,         // frames/second = (dwRate/dwScale)
        DWORD               dwScale);

/*
 *  ICDraw()
 *
 *  decompress data directly to the screen
 *
 */

#define ICDRAW_HURRYUP      0x80000000L   // don't draw just buffer (hurry up!)
#define ICDRAW_UPDATE       0x40000000L   // don't draw just update screen

DWORD VFWAPIV ICDraw(
        HIC                 hic,
        DWORD               dwFlags,        // flags
        LPVOID		    lpFormat,       // format of frame to decompress
        LPVOID              lpData,         // frame data to decompress
        DWORD               cbData,         // size of data
        LONG                lTime);         // time to draw this frame

// ICMessage is not supported on Win32, so provide a static inline function
// to do the same job
static __inline LRESULT VFWAPI
ICDrawSuggestFormat(
            HIC hic,
            LPBITMAPINFOHEADER lpbiIn,
            LPBITMAPINFOHEADER lpbiOut,
            int dxSrc,
            int dySrc,
            int dxDst,
            int dyDst,
            HIC hicDecomp)
{
    ICDRAWSUGGEST ic;

    ic.lpbiIn = lpbiIn;
    ic.lpbiSuggest = lpbiOut;
    ic.dxSrc = dxSrc;
    ic.dySrc = dySrc;
    ic.dxDst = dxDst;
    ic.dyDst = dyDst;
    ic.hicDecompressor = hicDecomp;

    // note that ICM swaps round the length and pointer
    // length in lparam2, pointer in lparam1
    return ICSendMessage(hic, ICM_DRAW_SUGGESTFORMAT, (DWORD)&ic, sizeof(ic));
}

/*
 *  ICDrawQuery()
 *
 *  determines if the compressor is willing to render the specified format.
 *
 */
#define ICDrawQuery(hic, lpbiInput) \
    ICSendMessage(hic, ICM_DRAW_QUERY, (DWORD)(LPVOID)(lpbiInput), 0L)

#define ICDrawChangePalette(hic, lpbiInput) \
    ICSendMessage(hic, ICM_DRAW_CHANGEPALETTE, (DWORD)(LPVOID)(lpbiInput), 0L)

#define ICGetBuffersWanted(hic, lpdwBuffers) \
    ICSendMessage(hic, ICM_GETBUFFERSWANTED, (DWORD)(LPVOID)(lpdwBuffers), 0)

#define ICDrawEnd(hic) \
    ICSendMessage(hic, ICM_DRAW_END, 0, 0)

#define ICDrawStart(hic) \
    ICSendMessage(hic, ICM_DRAW_START, 0, 0)

#define ICDrawStartPlay(hic, lFrom, lTo) \
    ICSendMessage(hic, ICM_DRAW_START_PLAY, (DWORD)(lFrom), (DWORD)(lTo))

#define ICDrawStop(hic) \
    ICSendMessage(hic, ICM_DRAW_STOP, 0, 0)

#define ICDrawStopPlay(hic) \
    ICSendMessage(hic, ICM_DRAW_STOP_PLAY, 0, 0)

#define ICDrawGetTime(hic, lplTime) \
    ICSendMessage(hic, ICM_DRAW_GETTIME, (DWORD)(LPVOID)(lplTime), 0)

#define ICDrawSetTime(hic, lTime) \
    ICSendMessage(hic, ICM_DRAW_SETTIME, (DWORD)lTime, 0)

#define ICDrawRealize(hic, hdc, fBackground) \
    ICSendMessage(hic, ICM_DRAW_REALIZE, (DWORD)(UINT)(HDC)(hdc), (DWORD)(BOOL)(fBackground))

#define ICDrawFlush(hic) \
    ICSendMessage(hic, ICM_DRAW_FLUSH, 0, 0)

#define ICDrawRenderBuffer(hic) \
    ICSendMessage(hic, ICM_DRAW_RENDERBUFFER, 0, 0)

/************************************************************************

    Status callback functions

************************************************************************/

/*
 *  ICSetStatusProc()
 *
 *  Set the status callback function
 *
 */

// ICMessage is not supported on NT
static __inline LRESULT VFWAPI
ICSetStatusProc(
            HIC hic,
            DWORD dwFlags,
            LRESULT lParam,
            LONG (CALLBACK *fpfnStatus)(LPARAM, UINT, LONG) )
{
    ICSETSTATUSPROC ic;

    ic.dwFlags = dwFlags;
    ic.lParam = lParam;
    ic.Status = fpfnStatus;

    // note that ICM swaps round the length and pointer
    // length in lparam2, pointer in lparam1
    return ICSendMessage(hic, ICM_SET_STATUS_PROC, (DWORD)&ic, sizeof(ic));
}

/************************************************************************

helper routines for DrawDib and MCIAVI...

************************************************************************/

#define ICDecompressOpen(fccType, fccHandler, lpbiIn, lpbiOut) \
    ICLocate(fccType, fccHandler, lpbiIn, lpbiOut, ICMODE_DECOMPRESS)

#define ICDrawOpen(fccType, fccHandler, lpbiIn) \
    ICLocate(fccType, fccHandler, lpbiIn, NULL, ICMODE_DRAW)

HIC  VFWAPI ICLocate(DWORD fccType, DWORD fccHandler, LPBITMAPINFOHEADER lpbiIn, LPBITMAPINFOHEADER lpbiOut, WORD wFlags);
HIC  VFWAPI ICGetDisplayFormat(HIC hic, LPBITMAPINFOHEADER lpbiIn, LPBITMAPINFOHEADER lpbiOut, int BitDepth, int dx, int dy);

/************************************************************************
Higher level functions
************************************************************************/

HANDLE VFWAPI ICImageCompress(
        HIC                 hic,        // compressor to use
        UINT                uiFlags,    // flags (none yet)
        LPBITMAPINFO	    lpbiIn,     // format to compress from
        LPVOID              lpBits,     // data to compress
        LPBITMAPINFO        lpbiOut,    // compress to this (NULL ==> default)
        LONG                lQuality,   // quality to use
        LONG FAR *          plSize);     // compress to this size (0=whatever)

HANDLE VFWAPI ICImageDecompress(
        HIC                 hic,        // compressor to use
        UINT                uiFlags,    // flags (none yet)
        LPBITMAPINFO        lpbiIn,     // format to decompress from
        LPVOID              lpBits,     // data to decompress
        LPBITMAPINFO        lpbiOut);   // decompress to this (NULL ==> default)

//
// Structure used by ICSeqCompressFrame and ICCompressorChoose routines
// Make sure this matches the autodoc in icm.c!
//
typedef struct {
    LONG		cbSize;		// set to sizeof(COMPVARS) before
					// calling ICCompressorChoose
    DWORD		dwFlags;	// see below...
    HIC			hic;		// HIC of chosen compressor
    DWORD               fccType;	// basically ICTYPE_VIDEO
    DWORD               fccHandler;	// handler of chosen compressor or
					// "" or "DIB "
    LPBITMAPINFO	lpbiIn;		// input format
    LPBITMAPINFO	lpbiOut;	// output format - will compress to this
    LPVOID		lpBitsOut;
    LPVOID		lpBitsPrev;
    LONG		lFrame;
    LONG		lKey;		// key frames how often?
    LONG		lDataRate;	// desired data rate KB/Sec
    LONG		lQ;		// desired quality
    LONG		lKeyCount;
    LPVOID		lpState;	// state of compressor
    LONG		cbState;	// size of the state
} COMPVARS, FAR *PCOMPVARS;

// FLAGS for dwFlags element of COMPVARS structure:
// set this flag if you initialize COMPVARS before calling ICCompressorChoose
#define ICMF_COMPVARS_VALID	0x00000001	// COMPVARS contains valid data

//
//  allows user to choose compressor, quality etc...
//
BOOL VFWAPI ICCompressorChoose(
        HWND        hwnd,               // parent window for dialog
        UINT        uiFlags,            // flags
        LPVOID      pvIn,               // input format (optional)
        LPVOID      lpData,             // input data (optional)
        PCOMPVARS   pc,                 // data about the compressor/dlg
        LPSTR       lpszTitle);         // dialog title (optional)

// defines for uiFlags
#define ICMF_CHOOSE_KEYFRAME	0x0001	// show KeyFrame Every box
#define ICMF_CHOOSE_DATARATE	0x0002	// show DataRate box
#define ICMF_CHOOSE_PREVIEW	0x0004	// allow expanded preview dialog
#define ICMF_CHOOSE_ALLCOMPRESSORS	0x0008	// don't only show those that
						// can handle the input format
						// or input data