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CGImageWrapper.h

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+/*  
+ *  Webcam/FaceTracking/Custom Views example project - jamesghurley<at>gmail.com
+ *  This project emulates 1-on-1 video conferencing using modern Cocoa frameworks and techniques.
+ *  
+ *  CGImageWrapper.h/.m - Used to pass a CGImageRef to the main thread.
+ */
+
+#import <Cocoa/Cocoa.h>
+
+
+@interface CGImageWrapper : NSObject {
+    @public
+    CGImageRef image;
+}
+@property CGImageRef image;
+
+-(id) initWithCGImage: (CGImageRef) _image;
+-(id) initWithCVImageBufferRef: (CVImageBufferRef) _imageBuffer;
+@end

CGImageWrapper.m

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+/*  
+ *  Webcam/FaceTracking/Custom Views example project - jamesghurley<at>gmail.com
+ *  This project emulates 1-on-1 video conferencing using modern Cocoa frameworks and techniques.
+ *  
+ *  CGImageWrapper.h/.m - Used to pass a CGImageRef to the main thread.
+ */
+#import "CGImageWrapper.h"
+#import <CoreVideo/CoreVideo.h>
+
+
+@implementation CGImageWrapper
+@synthesize image;
+// -----------------------------------------------------------------------------
+- (id) initWithCGImage:(CGImageRef)_image{
+    if((self = [super init])){
+        image = _image;
+    }
+    return self;
+}
+// -----------------------------------------------------------------------------
+-(id) initWithCVImageBufferRef: (CVImageBufferRef) _imageBuffer{
+
+    if((self = [super init])){
+
+        CGColorSpaceRef  colorSpace  = CGColorSpaceCreateWithName(kCGColorSpaceGenericRGB);
+        void            *baseAddr    = CVPixelBufferGetBaseAddress(_imageBuffer);
+        size_t           bytesPerRow = CVPixelBufferGetBytesPerRow(_imageBuffer);
+        size_t           width       = CVPixelBufferGetWidth(_imageBuffer);
+        size_t           height      = CVPixelBufferGetHeight(_imageBuffer);
+
+        CGDataProviderRef provider   = CGDataProviderCreateWithData(NULL, baseAddr, bytesPerRow*height, NULL);
+
+        image = CGImageCreate(width, height, 8, 24, bytesPerRow, colorSpace, kCGImageAlphaNone, provider, NULL, false, kCGRenderingIntentDefault);
+
+        CGColorSpaceRelease(colorSpace);
+        CGDataProviderRelease(provider);
+    }
+
+    return self;
+}
+// -----------------------------------------------------------------------------
+- (void) dealloc{
+    CGImageRelease(image);
+    [super dealloc];
+}
+@end