/*

    File:       QTUtilities.c

    Description: Miscellaneous QuickTime utility routines.

    Copyright:  © Copyright 2003 Apple Computer, Inc. All rights reserved.

    Disclaimer: IMPORTANT:  This Apple software is supplied to you by Apple Computer, Inc.

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                reproduce, modify and redistribute the Apple Software, with or without

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                expressly stated in this notice, no other rights or licenses, express or implied,

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                Software may be incorporated.

                The Apple Software is provided by Apple on an "AS IS" basis.  APPLE MAKES NO

                WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED

                WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR

                PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE OR IN

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    Change History (most recent first):

*/

#include "QTUtilities.h"

#include "Utilities.h"

#define BailErr(x) {if (x != noErr) goto bail;}

//////////

//

// GetMovieFromFile

// Opens a movie file, then creates a new movie for the file

//

//////////

OSErr GetMovieFromFile(FSSpec *fsspecPtr, Movie *theMovie)

{

    short   resRefNum = -1;

    OSErr   result;

    *theMovie = NULL;

    result = OpenMovieFile(fsspecPtr, &resRefNum, 0);

    if (result == noErr)

    {

        short actualResId = DoTheRightThing;

        result = NewMovieFromFile(theMovie, 

                                resRefNum, 

                                &actualResId, 

                                (unsigned char *) 0,

                                0,

                                (Boolean *) 0);

        CloseMovieFile(resRefNum);

    }

    return result;

}

//////////

//

// GetAMovieFile

// Prompt the user for a movie file, then open

// the file and create a movie for it.

//

//////////

OSErr GetAMovieFile(Movie *theMovie)

{

    OSType  myTypeList[2] = {kQTFileTypeMovie, kQTFileTypeQuickTimeImage};

    FSSpec  theFSSpec;

    OSErr   result = noErr;

    *theMovie = nil;

    result = GetOneFileWithPreview(2, myTypeList, &theFSSpec, NULL);

    if (result != userCanceledErr)

    {            

        result = GetMovieFromFile(&theFSSpec, theMovie);

    }

    return result;

}

//////////

//

// NormalizeMovieRect

//

//////////

void NormalizeMovieRect(Movie theMovie)

{

    Rect movieBounds;

    GetMovieBox(theMovie, &movieBounds);

    OffsetRect(&movieBounds, -movieBounds.left, -movieBounds.top);

    movieBounds.right = movieBounds.left + 320;

    movieBounds.bottom = movieBounds.top + 240;

    SetMovieBox(theMovie, &movieBounds);

}

//////////

//

// EraseRectAndAlpha

// Zeros out a section of the GWorld, including alpha.

//

//////////

void EraseRectAndAlpha(GWorldPtr gWorld, Rect *pRect)

{

    PixMapHandle    pixMap = GetGWorldPixMap(gWorld);

    long            rows;

    Ptr             rowBaseAddr;

    LockPixels(pixMap);

    rows = pRect->bottom - pRect->top;

    rowBaseAddr = GetPixBaseAddr(pixMap) + (GetPixRowBytes(pixMap) & 0x3fff) * pRect->top + pRect->left * GetPixDepth(pixMap) / 8;

    do

    {

        long    cols;

        UInt32  *baseAddr;

        cols = pRect->right - pRect->left;

        baseAddr = (UInt32*)rowBaseAddr;

        rowBaseAddr += (**pixMap).rowBytes & 0x3fff;

        do

        {

            *baseAddr++ = 0;

        } while (--cols);

    } while (--rows);

    UnlockPixels(pixMap);

} // EraseRectAndAlpha

//////////

//

// CreateDecompSeqForSGChannelData

// Create a decompression sequence for the passed

// Sequence Grabber channel data

//

//////////

OSErr CreateDecompSeqForSGChannelData(SGChannel sgChannel, Rect *srcBounds, GWorldPtr imageDestination, ImageSequence *imageSeqID)

{

    OSErr err = noErr;

    ImageDescriptionHandle  imageDesc = (ImageDescriptionHandle)NewHandle(sizeof(ImageDescription));

    if (imageDesc)

    {

        err = SGGetChannelSampleDescription(sgChannel,(Handle)imageDesc);

        // The original version of this code had a bug - it passed in a Crop Rect to DecompressSequenceBegin instead of a scaling matrix

        // This only worked because of another bug inside QT that reated the crop Rect as a destination rect for DV

        // the following code does the right thing in all cases.

        if (err == noErr)

        {

            MatrixRecord    mr;

            Rect            fromR;

            fromR.left = 0;

            fromR.top = 0;

            fromR.right = (**imageDesc).width;

            fromR.bottom = (**imageDesc).height;

            RectMatrix(&mr, &fromR, srcBounds);

            err = DecompressSequenceBegin(imageSeqID, imageDesc, imageDestination, 0, nil, &mr,srcCopy,nil,0, codecNormalQuality, bestSpeedCodec);

        }

        DisposeHandle((Handle)imageDesc);

    }

    else

    {

        err = MemError();

    }

    return err;

}

//////////

//

// CreateDecompSeqForGWorldData

// Create a decompression sequence for the specified gworld data

//

//////////

OSErr CreateDecompSeqForGWorldData(GWorldPtr srcGWorld, Rect *srcBounds, MatrixRecordPtr mr, GWorldPtr imageDestination, ImageSequence *imageSeqID)

{

    OSErr err;

    ImageDescriptionHandle imageDesc = (ImageDescriptionHandle)NewHandle(sizeof(ImageDescription));

    if (imageDesc)

    {

        err = MakeImageDescriptionForPixMap (GetGWorldPixMap(srcGWorld), &imageDesc);

        err = DecompressSequenceBegin(  imageSeqID, 

                                        imageDesc, 

                                        imageDestination, 

                                        0, 

                                        srcBounds, 

                                        mr, 

                                        srcCopy, 

                                        nil, 

                                        0, 

                                        codecNormalQuality, 

                                        bestSpeedCodec);

        DisposeHandle((Handle)imageDesc);

    }

    else

    {

        err = MemError();

    }

    return err;

}

//////////

//

// CreateNewSGChannelForRecording

// - create a new Sequence Grabber video channel

// - let the use configure the channel

// - set the channel bounds, usage

// - set a data proc for the channel

// - start recording data

//

//////////

OSErr CreateNewSGChannelForRecording(ComponentInstance seqGrab, SGDataUPP dataProc, CGrafPtr drawPort, Rect *theRect, SGChannel *sgChannel, long refCon)

{

    OSErr err = noErr;

    BailErr((err = SGInitialize(seqGrab)));

    // tell it we're not making a movie

    BailErr((err = SGSetDataRef(seqGrab,0,0,seqGrabDontMakeMovie)));

    // It wants a port, even if its not drawing to it

    BailErr((err = SGSetGWorld(seqGrab, drawPort, GetMainDevice())));

    BailErr((err = SGNewChannel(seqGrab, VideoMediaType, sgChannel)));

    // let the user configure the video channel

    BailErr((err = SGSettingsDialog(seqGrab, *sgChannel, 0, nil, 0, nil, 0)));

    BailErr((err = SGSetChannelBounds(*sgChannel, theRect)));

    // set usage for new video channel to avoid playthrough

    BailErr((err = SGSetChannelUsage(*sgChannel, seqGrabRecord ))); //note we don't set seqGrabPlayDuringRecord

    BailErr((err = SGSetDataProc(seqGrab, dataProc, refCon)));

    BailErr((err = SGStartRecord(seqGrab)));

bail:

    return err;

}

//////////

//

// DoCloseSG

// Terminate recording for our SG channel - dispose of the channel and 

// the associated SG component instance

//

//////////

void DoCloseSG(ComponentInstance seqGrab, SGChannel sgChannel, SGDataUPP dataProc)

{

    if(seqGrab) 

    {

        SGStop(seqGrab);

        SGSetDataProc(seqGrab, NULL ,NULL);

        if (dataProc)

        {

            DisposeSGDataUPP(dataProc);

        }

        SGDisposeChannel(seqGrab, sgChannel);

        CloseComponent(seqGrab);

    }

}