/*

 Copyright (C) 2016 Apple Inc. All Rights Reserved.

 See LICENSE.txt for this sample’s licensing information

 Abstract:

 The class that creates and manages the AVCaptureSession

 */

#import <AVFoundation/AVFoundation.h>

@protocol RosyWriterCapturePipelineDelegate;

@interface RosyWriterCapturePipeline : NSObject 

- (instancetype)initWithDelegate:(id<RosyWriterCapturePipelineDelegate>)delegate callbackQueue:(dispatch_queue_t)queue; // delegate is weak referenced

// These methods are synchronous

- (void)startRunning;

- (void)stopRunning;

// Must be running before starting recording

// These methods are asynchronous, see the recording delegate callbacks

- (void)startRecording;

- (void)stopRecording;

@property(atomic) BOOL renderingEnabled; // When set to NO the GPU will not be used after the setRenderingEnabled: call returns.

@property(atomic) AVCaptureVideoOrientation recordingOrientation; // client can set the orientation for the recorded movie

- (CGAffineTransform)transformFromVideoBufferOrientationToOrientation:(AVCaptureVideoOrientation)orientation withAutoMirroring:(BOOL)mirroring; // only valid after startRunning has been called

// Stats

@property(atomic, readonly) float videoFrameRate;

@property(atomic, readonly) CMVideoDimensions videoDimensions;

@end

@protocol RosyWriterCapturePipelineDelegate <NSObject>

@required

- (void)capturePipeline:(RosyWriterCapturePipeline *)capturePipeline didStopRunningWithError:(NSError *)error;

// Preview

- (void)capturePipeline:(RosyWriterCapturePipeline *)capturePipeline previewPixelBufferReadyForDisplay:(CVPixelBufferRef)previewPixelBuffer;

- (void)capturePipelineDidRunOutOfPreviewBuffers:(RosyWriterCapturePipeline *)capturePipeline;

// Recording

- (void)capturePipelineRecordingDidStart:(RosyWriterCapturePipeline *)capturePipeline;

- (void)capturePipeline:(RosyWriterCapturePipeline *)capturePipeline recordingDidFailWithError:(NSError *)error; // Can happen at any point after a startRecording call, for example: startRecording->didFail (without a didStart), willStop->didFail (without a didStop)

- (void)capturePipelineRecordingWillStop:(RosyWriterCapturePipeline *)capturePipeline;

- (void)capturePipelineRecordingDidStop:(RosyWriterCapturePipeline *)capturePipeline;

@end