move sunshine to src

- this will allow for common cpp workflow files within org

src/platform/macos/av_video.h

@@ -0,0 +1,43 @@
+#ifndef SUNSHINE_PLATFORM_AV_VIDEO_H
+#define SUNSHINE_PLATFORM_AV_VIDEO_H
+
+#import <AVFoundation/AVFoundation.h>
+
+
+struct CaptureSession {
+  AVCaptureVideoDataOutput *output;
+  NSCondition *captureStopped;
+};
+
+@interface AVVideo : NSObject <AVCaptureVideoDataOutputSampleBufferDelegate>
+
+#define kMaxDisplays 32
+
+@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;
+@property(nonatomic, assign) float scaling;
+@property(nonatomic, assign) int paddingLeft;
+@property(nonatomic, assign) int paddingRight;
+@property(nonatomic, assign) int paddingTop;
+@property(nonatomic, assign) int paddingBottom;
+
+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;
+
++ (NSArray<NSDictionary *> *)displayNames;
+
+- (id)initWithDisplay:(CGDirectDisplayID)displayID frameRate:(int)frameRate;
+
+- (void)setFrameWidth:(int)frameWidth frameHeight:(int)frameHeight;
+- (dispatch_semaphore_t)capture:(FrameCallbackBlock)frameCallback;
+
+@end
+
+#endif //SUNSHINE_PLATFORM_AV_VIDEO_H