//////////

//

//  File:       QuickTimeCode.c

//

//  Contains:   QuickTime routines to create a movie.

//

//  Written by: Apple Developer Technical Support

//

//  Copyright:  © 2001 by Apple Computer, Inc., all rights reserved.

//

//  Change History (most recent first):

//     

//     <1>      7/18/01 srk     first file

//

//////////

/*

 IMPORTANT:  This Apple software is supplied to you by Apple Computer, Inc. ("Apple") in

 consideration of your agreement to the following terms, and your use, installation, 

 modification or redistribution of this Apple software constitutes acceptance of these 

 terms.  If you do not agree with these terms, please do not use, install, modify or 

 redistribute this Apple software.

 In consideration of your agreement to abide by the following terms, and subject to these 

 terms, Apple grants you a personal, non-exclusive license, under AppleÕs copyrights in 

 this original Apple software (the "Apple Software"), to use, reproduce, modify and 

 redistribute the Apple Software, with or without modifications, in source and/or binary 

 forms; provided that if you redistribute the Apple Software in its entirety and without 

 modifications, you must retain this notice and the following text and disclaimers in all 

 such redistributions of the Apple Software.  Neither the name, trademarks, service marks 

 or logos of Apple Computer, Inc. may be used to endorse or promote products derived from 

 the Apple Software without specific prior written permission from Apple. Except as expressly

 stated in this notice, no other rights or licenses, express or implied, are granted by Apple

 herein, including but not limited to any patent rights that may be infringed by your 

 derivative works or by other works in which the Apple 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 COMBINATION WITH YOUR PRODUCTS.

 IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL 

 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 

 OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, 

 REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED AND 

 WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY OR 

 OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

*/

//////////

//

// header files

//

//////////

#import "MyController.h"

#import <QuickTime/QuickTime.h>

#include <Carbon/Carbon.h>

#include <QuickTimeCode.h>

//////////

//

// prototypes

//

//////////

static StringPtr QTUtils_ConvertCToPascalString (char *theString);

static void CheckError(OSErr err, char *message );

static void QTVideo_CreateMyVideoTrack(Movie theMovie, Rect *trackFrame);

static void QTVideo_AddVideoSamplesToMedia(Media theMedia, const Rect *trackFrame);

//////////

//

// globals

//

//////////

void *gSelf;

//////////

//

// setObjCObject

//

// Store a reference to our ObjC object

// for the MyController class. This will allow

// us to call methods in this class

//

//////////

void setObjCObject(void *theObject)

{

    gSelf = theObject;

}

//////////

//

// CreateMovie

//

// QuickTime code to create a movie containing

// a single video track. We use the NSImages as

// the data for our video track.

//

//////////

Movie CreateMovie(Rect *trackFrame)

{

    Movie theMovie = nil;

    FSSpec mySpec;

    short resRefNum = 0;

    short resId = movieInDataForkResID;

    OSErr err = noErr;

    FSMakeFSSpec(0, 0, QTUtils_ConvertCToPascalString ("NewMovie.mov"), &mySpec);

    err = CreateMovieFile (&mySpec, 

                            kMyCreatorType,

                            smCurrentScript, 

                            createMovieFileDeleteCurFile | createMovieFileDontCreateResFile,

                            &resRefNum, 

                            &theMovie );

    QTVideo_CreateMyVideoTrack (theMovie, trackFrame);

    err = AddMovieResource (theMovie, resRefNum, &resId, QTUtils_ConvertCToPascalString ("testing"));

    if (resRefNum)

    {

        CloseMovieFile (resRefNum);

    }

    return theMovie;

}

//////////

//

// CheckError

//

//////////

static void CheckError(OSErr err, char *message )

{

    if (err != noErr)

    {

        printf(message);

    }

}

//////////

//

// QTVideo_CreateMyVideoTrack

//

// QuickTime code to create a video track

// for our movie

//

//////////

static void QTVideo_CreateMyVideoTrack(Movie theMovie, Rect *trackFrame)

{

    Track theTrack;

    Media theMedia;

    OSErr err = noErr;

        // 1. Create the track

        theTrack = NewMovieTrack (theMovie,         /* movie specifier */

                                    FixRatio((*trackFrame).right,1),  /* width */

                                    FixRatio((*trackFrame).bottom,1), /* height */

                                  kNoVolume);  /* trackVolume */

        CheckError( GetMoviesError(), "NewMovieTrack error" );

        // 2. Create the media for the track

        theMedia = NewTrackMedia (theTrack,     /* track identifier */

                                        VideoMediaType,     /* type of media */

                                        kVideoTimeScale,    /* time coordinate system */

                                        nil,            /* data reference - use the file that is associated with the movie  */

                                        0);         /* data reference type */

        CheckError( GetMoviesError(), "NewTrackMedia error" );

        // 3. Establish a media-editing session

        err = BeginMediaEdits (theMedia);

        CheckError( err, "BeginMediaEdits error" );

        // 3a. Add Samples to the media

        QTVideo_AddVideoSamplesToMedia (theMedia, trackFrame);

        // 3b. End media-editing session

        err = EndMediaEdits (theMedia);

        CheckError( err, "EndMediaEdits error" );

        // 4. Insert a reference to a media segment into the track

        err = InsertMediaIntoTrack (theTrack,       /* track specifier */

                    kTrackStart,    /* track start time */

                    kMediaStart,    /* media start time */

                    GetMediaDuration(theMedia), /* media duration */

                    fixed1);        /* media rate ((Fixed) 0x00010000L) */

        CheckError( err, "InsertMediaIntoTrack error" );

} 

//////////

//

// QTVideo_AddVideoSamplesToMedia

//

// Creates video samples for the media in a track

//

//////////

static void QTVideo_AddVideoSamplesToMedia(Media theMedia, const Rect *trackFrame)

{

    GWorldPtr theGWorld = nil;

    long maxCompressedSize;

    long curSample;

    Handle compressedData = nil;

    Ptr compressedDataPtr;

    ImageDescriptionHandle imageDesc = nil;

    CGrafPtr oldPort;

    GDHandle oldGDeviceH;

    OSErr err = noErr;

        // Create a graphics world

        err = NewGWorld (&theGWorld,    /* pointer to created gworld */ 

                kPixelDepth,        /* pixel depth */

                trackFrame,         /* bounds */

                nil,            /* color table */

                nil,            /* handle to GDevice */ 

                (GWorldFlags)0);    /* flags */

        CheckError (err, "NewGWorld error");

        // Lock the pixels

        LockPixels (GetGWorldPixMap(theGWorld)/*GetPortPixMap(theGWorld)*/);

        // Determine the maximum size the image will be after compression.

        // Specify the compression characteristics, along with the image.

        err = GetMaxCompressionSize(GetGWorldPixMap(theGWorld),     /* Handle to the source image */

                            trackFrame,                 /* bounds */

                            kMgrChoose,                 /* let ICM choose depth */

                            codecNormalQuality,             /* desired image quality */ 

                            kAnimationCodecType,            /* compressor type */ 

                            (CompressorComponent)anyCodec,          /* compressor identifier */

                            &maxCompressedSize);                /* returned size */

        CheckError (err, "GetMaxCompressionSize error" );

        // Create a new handle of the right size for our compressed image data

        compressedData = NewHandle(maxCompressedSize);

        CheckError( MemError(), "NewHandle error" );

        MoveHHi( compressedData );

        HLock( compressedData );

        compressedDataPtr = *compressedData;

        // Create a handle for the Image Description Structure

        imageDesc = (ImageDescriptionHandle)NewHandle(4);

        CheckError( MemError(), "NewHandle error" );

        // Change the current graphics port to the GWorld

        GetGWorld(&oldPort, &oldGDeviceH);

        SetGWorld(theGWorld, nil);

        // For each sample...

        for (curSample = 1; curSample <= [(MyController *)gSelf getNumberOfImages]; curSample++) 

        {

            // do the drawing of our image

            CopyNSImageToGWorld([(MyController *)gSelf getImageAtArrayIndex:((int)curSample-1)], theGWorld);

            // Use the ICM to compress the image 

            err = CompressImage(GetGWorldPixMap(theGWorld), /* source image to compress */

                                trackFrame,         /* bounds */

                                codecNormalQuality, /* desired image quality */

                                kAnimationCodecType,    /* compressor identifier */

                                imageDesc,      /* handle to Image Description Structure; will be resized by call */

                                compressedDataPtr); /* pointer to a location to recieve the compressed image data */

            CheckError( err, "CompressImage error" );

            // Add sample data and a description to a media

            err = AddMediaSample(theMedia,  /* media specifier */ 

                    compressedData, /* handle to sample data - dataIn */

                    kNoOffset,      /* specifies offset into data reffered to by dataIn handle */

                    (**imageDesc).dataSize, /* number of bytes of sample data to be added */ 

                    kSampleDuration,         /* frame duration = 1/10 sec */

                    (SampleDescriptionHandle)imageDesc, /* sample description handle */ 

                    kAddOneVideoSample, /* number of samples */

                    kSyncSample,    /* control flag indicating self-contained samples */

                    nil);       /* returns a time value where sample was insterted */

            CheckError( err, "AddMediaSample error" );

        } // for loop

        UnlockPixels (GetGWorldPixMap(theGWorld)/*GetPortPixMap(theGWorld)*/);

        SetGWorld (oldPort, oldGDeviceH);

        // Dealocate our previously alocated handles and GWorld

        if (imageDesc)

        {

                DisposeHandle ((Handle)imageDesc);

        }

        if (compressedData)

        {

                DisposeHandle (compressedData);

        }

        if (theGWorld)

        {

                DisposeGWorld (theGWorld);

        }

} 

//////////

//

// QTUtils_ConvertCToPascalString

// Convert a C string into a Pascal string.

//

// The caller is responsible for disposing of the pointer returned by this function (by calling free).

//

//////////

static StringPtr QTUtils_ConvertCToPascalString (char *theString)

{

    StringPtr   myString = malloc(strlen(theString) + 1);

    short       myIndex = 0;

    while (theString[myIndex] != '\0') {

        myString[myIndex + 1] = theString[myIndex];

        myIndex++;

    }

    myString[0] = (unsigned char)myIndex;

    return(myString);

}