/*

File: QTMovieExtensions.m

Abstract: QTMovie utility routines, implemented as extensions to the

            QTMovie class.

Version: 1.2

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*/ 

#import "QTMovieExtensions.h"

@implementation QTMovie (QTMovieExtensions)

//

// addImagesAsMPEG4

//

// given an array of image file paths (NSString objects), add each

// image to the movie as a new MPEG4 movie frame

//

// Inputs

//      imageFilesArray - an array of image file paths (NSString objects)

//

// Outputs

//      images specified in imageFilesArray are added to movie

//      as new movie frames

//

- (void)addImagesAsMPEG4:(NSArray *)imageFilesArray

{

    if (!imageFilesArray)

        goto bail;

    // when adding images we must provide a dictionary

    // specifying the codec attributes

    NSDictionary *myDict = nil;

    myDict = [NSDictionary dictionaryWithObjectsAndKeys:@"mp4v",

                                                        QTAddImageCodecType,

                                                        [NSNumber numberWithLong:codecHighQuality],

                                                        QTAddImageCodecQuality,

                                                        nil];

    if (!myDict)

        goto bail;

    // create a QTTime value to be used as a duration when adding 

    // the image to the movie

    long long timeValue = 30;

    long timeScale      = 600;

    QTTime duration     = QTMakeTime(timeValue, timeScale);

    // iterate over all the images in the array and add

    // them to our movie one-by-one

    int i;

    for (i = 0; i < [imageFilesArray count]; ++i)

    {

        NSURL *fileUrl = [NSURL fileURLWithPath:[imageFilesArray objectAtIndex:i]];        

        NSImage *anImage = [[NSImage alloc] initWithContentsOfURL:fileUrl];    

        if (anImage)

        {

            // Adds an image for the specified duration to the QTMovie

            [self addImage:anImage 

                    forDuration:duration

                    withAttributes:myDict];

            // free up our image object

            [anImage release];

        }

    }

bail:

    return;

}

//

// flattenToFilePath

//

// flatten the movie to the specified path

//

// Inputs

//      filePath - destination file path for flattened movie

//

// Outputs

//      movie is flattened to a self-contained movie file

//      specified by the filePath input parameter

//

- (BOOL)flattenToFilePath:(NSString *)filePath

{

    BOOL success = NO;

    if (!filePath) 

        goto bail;

    // create a dict. with the movie flatten attribute (QTMovieFlatten)

    // which we'll use to flatten the movie to a file below

    // specify a 'YES' in the dictionary to flatten to a new movie file

    // specify a 'NO' in the dictionary to only create a reference movie

    NSDictionary    *dict = nil;

    dict = [NSDictionary dictionaryWithObject:[NSNumber numberWithBool:YES] 

                forKey:QTMovieFlatten];

    if (dict)

    {

        // create a new movie file and flatten the movie to the file

        // passing the QTMovieFlatten attribute here means the movie

        // will be flattened

        success = [self writeToFile:filePath withAttributes:dict];

    }

bail:

    return success;

}

@end