vfw_gai.pas

加密算法,非常好的,值得看啊,太好不过,很好 很好很好很好很好

        lDataRate   : LONG;             // desired data rate KB/Sec
        lQ          : LONG;             // desired quality
        lKeyCount   : LONG;
        lpState     : PVOID;            // state of compressor
        cbState     : LONG;             // size of the state
    end;

// FLAGS for dwFlags element of COMPVARS structure:
// set this flag if you initialize COMPVARS before calling ICCompressorChoose

const
    ICMF_COMPVARS_VALID         = $00000001;    // COMPVARS contains valid data

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

// defines for uiFlags

const
    ICMF_CHOOSE_KEYFRAME        = $0001;    // show KeyFrame Every box
    ICMF_CHOOSE_DATARATE        = $0002;    // show DataRate box
    ICMF_CHOOSE_PREVIEW         = $0004;    // allow expanded preview dialog
    ICMF_CHOOSE_ALLCOMPRESSORS  = $0008;    // don't only show those that
                                            // can handle the input format
                                            // or input data

function    ICSeqCompressFrameStart(pc: PCOMPVARS; lpbiIn: PBITMAPINFO): BOOL; stdcall;
procedure   ICSeqCompressFrameEnd(pc: PCOMPVARS); stdcall;

function    ICSeqCompressFrame(
    pc          : PCOMPVARS;                // set by ICCompressorChoose
    uiFlags     : UINT;                     // flags
    lpBits      : PVOID;                    // input DIB bits
    pfKey       : PBOOL;                    // did it end up being a key frame?
    plSize      : PDWORD                     // size to compress to/of returned image
    ): PVOID; stdcall;

procedure   ICCompressorFree(pc: PCOMPVARS); stdcall;


(**************************************************************************
 *
 *  DRAWDIB - Routines for drawing to the display.
 *
 *************************************************************************)

type
    HDRAWDIB                    = THandle;  // hdd

(*********************************************************************

  DrawDib Flags

**********************************************************************)

const
    DDF_UPDATE                  = $0002;    // re-draw the last DIB
    DDF_SAME_HDC                = $0004;    // HDC same as last call (all setup)
    DDF_SAME_DRAW               = $0008;    // draw params are the same
    DDF_DONTDRAW                = $0010;    // dont draw frame, just decompress
    DDF_ANIMATE                 = $0020;    // allow palette animation
    DDF_BUFFER                  = $0040;    // always buffer image
    DDF_JUSTDRAWIT              = $0080;    // just draw it with GDI
    DDF_FULLSCREEN              = $0100;    // use DisplayDib
    DDF_BACKGROUNDPAL           = $0200;    // Realize palette in background
    DDF_NOTKEYFRAME             = $0400;    // this is a partial frame update, hint
    DDF_HURRYUP                 = $0800;    // hurry up please!
    DDF_HALFTONE                = $1000;    // always halftone

    DDF_PREROLL                 = DDF_DONTDRAW; // Builing up a non-keyframe
    DDF_SAME_DIB                = DDF_SAME_DRAW;
    DDF_SAME_SIZE               = DDF_SAME_DRAW;

(*********************************************************************

    DrawDib functions

*********************************************************************)

{-- DrawDibOpen() ------------------------------------------------------------}

function    DrawDibOpen: HDRAWDIB; stdcall;

{-- DrawDibClose() -----------------------------------------------------------}

function    DrawDibClose(hdd: HDRAWDIB): BOOL; stdcall;

{-- DrawDibGetBuffer() -------------------------------------------------------}

function    DrawDibGetBuffer(hdd: HDRAWDIB; lpbi: PBITMAPINFOHEADER; dwSize: DWORD; dwFlags: DWORD): PVOID; stdcall;

{-- DrawDibGetPalette() - get the palette used for drawing DIBs --------------}

function    DrawDibGetPalette(hdd: HDRAWDIB): HPALETTE; stdcall;

{-- DrawDibSetPalette() - set the palette used for drawing DIBs --------------}

function    DrawDibSetPalette(hdd: HDRAWDIB; hpal: HPALETTE): BOOL; stdcall;

{-- DrawDibChangePalette() ---------------------------------------------------}

function    DrawDibChangePalette(hdd: HDRAWDIB; iStart, iLen: int; lppe: PPALETTEENTRY): BOOL; stdcall;

{-- DrawDibRealize() - realize the palette in a HDD --------------------------}

function    DrawDibRealize(hdd: HDRAWDIB; hdc: HDC; fBackground: BOOL): UINT; stdcall;

{-- DrawDibStart() - start of streaming playback -----------------------------}

function    DrawDibStart(hdd: HDRAWDIB; rate: DWORD): BOOL; stdcall;

{-- DrawDibStop() - start of streaming playback ------------------------------}

function    DrawDibStop(hdd: HDRAWDIB): BOOL; stdcall;

{-- DrawDibBegin() - prepare to draw -----------------------------------------}

function    DrawDibBegin(
    hdd         : HDRAWDIB;
    hdc         : HDC;
    dxDst       : int;
    dyDst       : int;
    lpbi        : PBITMAPINFOHEADER;
    dxSrc       : int;
    dySrc       : int;
    wFlags      : UINT
    ): BOOL; stdcall;

{-- DrawDibDraw() - actually draw a DIB to the screen ------------------------}

function    DrawDibDraw(
    hdd         : HDRAWDIB;
    hdc         : HDC;
    xDst        : int;
    yDst        : int;
    dxDst       : int;
    dyDst       : int;
    lpbi        : PBITMAPINFOHEADER;
    lpBits      : PVOID;
    xSrc        : int;
    ySrc        : int;
    dxSrc       : int;
    dySrc       : int;
    wFlags      : UINT
    ): BOOL; stdcall;

{-- DrawDibUpdate() - redraw last image (may only be valid with DDF_BUFFER) --}

function    DrawDibUpdate(hdd: HDRAWDIB; hdc: HDC; x, y: int): BOOL;

{-- DrawDibEnd() -------------------------------------------------------------}

function    DrawDibEnd(hdd: HDRAWDIB): BOOL; stdcall;

{-- DrawDibTime() - for debugging purposes only ------------------------------}

type
    PDRAWDIBTIME        = ^TDRAWDIBTIME;
    TDRAWDIBTIME        = packed record
        timeCount       : LONG;
        timeDraw        : LONG;
        timeDecompress  : LONG;
        timeDither      : LONG;
        timeStretch     : LONG;
        timeBlt         : LONG;
        timeSetDIBits   : LONG;
    end;

function    DrawDibTime(hdd: HDRAWDIB; lpddtime: PDRAWDIBTIME): BOOL; stdcall;

procedure StretchDIB(
  biDst   : PBITMAPINFOHEADER;
  lpvDst  : PVOID;
  DstX    : Integer;
  DstY    : Integer;
  DstXE   : Integer;
  DstYE   : Integer;
  biSrc   : PBITMAPINFOHEADER;
  lpvSrc  : PVOID;
  SrcX    : Integer;
  SrcY    : Integer;
  SrcXE   : Integer;
  SrcYE   : Integer
); stdcall;


{-- Display profiling --------------------------------------------------------}

const
    PD_CAN_DRAW_DIB             = $0001;    // if you can draw at all
    PD_CAN_STRETCHDIB           = $0002;    // basicly RC_STRETCHDIB
    PD_STRETCHDIB_1_1_OK        = $0004;    // is it fast?
    PD_STRETCHDIB_1_2_OK        = $0008;    // ...
    PD_STRETCHDIB_1_N_OK        = $0010;    // ...

function    DrawDibProfileDisplay(lpbi: PBITMAPINFOHEADER): DWORD; stdcall;

(****************************************************************************
 *
 *  AVIFMT - AVI file format definitions
 *
 ****************************************************************************)

//
// The following is a short description of the AVI file format.  Please
// see the accompanying documentation for a full explanation.
//
// An AVI file is the following RIFF form:
//
//  RIFF('AVI'
//        LIST('hdrl'
//          avih(<MainAVIHeader>)
//                  LIST ('strl'
//                      strh(<Stream header>)
//                      strf(<Stream format>)
//                      ... additional header data
//            LIST('movi'
//            { LIST('rec'
//                    SubChunk...
//                 )
//                | SubChunk } ....
//            )
//            [ <AVIIndex> ]
//      )
//
//  The main file header specifies how many streams are present.  For
//  each one, there must be a stream header chunk and a stream format
//  chunk, enlosed in a 'strl' LIST chunk.  The 'strf' chunk contains
//  type-specific format information; for a video stream, this should
//  be a BITMAPINFO structure, including palette.  For an audio stream,
//  this should be a WAVEFORMAT (or PCMWAVEFORMAT) structure.
//
//  The actual data is contained in subchunks within the 'movi' LIST
//  chunk.  The first two characters of each data chunk are the
//  stream number with which that data is associated.
//
//  Some defined chunk types:
//           Video Streams:
//                  ##db:   RGB DIB bits
//                  ##dc:   RLE8 compressed DIB bits
//                  ##pc:   Palette Change
//
//           Audio Streams:
//                  ##wb:   waveform audio bytes
//
// The grouping into LIST 'rec' chunks implies only that the contents of
//   the chunk should be read into memory at the same time.  This
//   grouping is used for files specifically intended to be played from
//   CD-ROM.
//
// The index chunk at the end of the file should contain one entry for
//   each data chunk in the file.
//
// Limitations for the current software:
//  Only one video stream and one audio stream are allowed.
//  The streams must start at the beginning of the file.
//
//
// To register codec types please obtain a copy of the Multimedia
// Developer Registration Kit from:
//
//  Microsoft Corporation
//  Multimedia Systems Group
//  Product Marketing
//  One Microsoft Way
//  Redmond, WA 98052-6399
//

{-- form types, list types and chunk types -----------------------------------}

const
    formtypeAVI                 = $20495641; // mmioFOURCC('A', 'V', 'I', ' ')
    listtypeAVIHEADER           = $6C726468; // mmioFOURCC('h', 'd', 'r', 'l')
    ckidAVIMAINHDR              = $68697661; // mmioFOURCC('a', 'v', 'i', 'h')
    listtypeSTREAMHEADER        = $6C727473; // mmioFOURCC('s', 't', 'r', 'l')
    ckidSTREAMHEADER            = $68727473; // mmioFOURCC('s', 't', 'r', 'h')
    ckidSTREAMFORMAT            = $66727473; // mmioFOURCC('s', 't', 'r', 'f')
    ckidSTREAMHANDLERDATA       = $64727473; // mmioFOURCC('s', 't', 'r', 'd')
    ckidSTREAMNAME              = $6E727473; // mmioFOURCC('s', 't', 'r', 'n')

    listtypeAVIMOVIE            = $69766F6D; // mmioFOURCC('m', 'o', 'v', 'i')
    listtypeAVIRECORD           = $20636572; // mmioFOURCC('r', 'e', 'c', ' ')

    ckidAVINEWINDEX             = $31786469; // mmioFOURCC('i', 'd', 'x', '1')

{-- Stream types for the <fccType> field of the stream header ----------------}

    streamtypeVIDEO             = $73646976; // mmioFOURCC('v', 'i', 'd', 's')
    streamtypeAUDIO             = $73647561; // mmioFOURCC('a', 'u', 'd', 's')
    streamtypeMIDI              = $7364696D; // mmioFOURCC('m', 'i', 'd', 's')
    streamtypeTEXT              = $73747874; // mmioFOURCC('t', 'x', 't', 's')

{-- Basic chunk types --------------------------------------------------------}

    cktypeDIBbits               = $6264; // aviTWOCC('d', 'b')
    cktypeDIBcompressed         = $6364; // aviTWOCC('d', 'c')
    cktypePALchange             = $6370; // aviTWOCC('p', 'c')
    cktypeWAVEbytes             = $6277; // aviTWOCC('w', 'b')

{-- Chunk id to use for extra chunks for padding -----------------------------}

    ckidAVIPADDING              = $4B4E554A; // mmioFOURCC('J', 'U', 'N', 'K')

(*
** Useful macros
**
** Warning: These are nasty macro, and MS C 6.0 compiles some of them
** incorrectly if optimizations are on.  Ack.
*)

{-- Macro to get stream number out of a FOURCC ckid --------------------------}

function    FromHex(n: BYTE): BYTE;
function    StreamFromFOURCC(fcc: DWORD): BYTE;

{-- Macro to get TWOCC chunk type out of a FOURCC ckid -----------------------}

function    TWOCCFromFOURCC(fcc: DWORD): WORD;

{-- Macro to make a ckid for a chunk out of a TWOCC and a stream num (0-255) -}