av_video.h

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#pragma once
 
// platform includes
#import <AVFoundation/AVFoundation.h>
#import <CoreGraphics/CoreGraphics.h>
 
struct CaptureSession {
  AVCaptureVideoDataOutput *output;  
  NSCondition *captureStopped;  
};
 
@interface AVVideo: NSObject <AVCaptureVideoDataOutputSampleBufferDelegate>
 
@property (nonatomic, assign) CGDirectDisplayID displayID;
@property (nonatomic, assign) CMTime minFrameDuration;
@property (nonatomic, assign) OSType pixelFormat;
@property (nonatomic, assign) int frameWidth;
@property (nonatomic, assign) int frameHeight;
 
typedef bool (^FrameCallbackBlock)(CMSampleBufferRef);
 
@property (nonatomic, assign) AVCaptureSession *session;
@property (nonatomic, assign) NSMapTable<AVCaptureConnection *, AVCaptureVideoDataOutput *> *videoOutputs;
@property (nonatomic, assign) NSMapTable<AVCaptureConnection *, FrameCallbackBlock> *captureCallbacks;
@property (nonatomic, assign) NSMapTable<AVCaptureConnection *, dispatch_semaphore_t> *captureSignals;
 
- (id)initWithDisplay:(CGDirectDisplayID)displayID frameRate:(int)frameRate;
 
- (void)setFrameWidth:(int)frameWidth frameHeight:(int)frameHeight;
- (dispatch_semaphore_t)capture:(FrameCallbackBlock)frameCallback;
 
@end