#import <Foundation/Foundation.h>
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#import <AVFoundation/AVFoundation.h>
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#import <CoreMedia/CoreMedia.h>
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#import "GPUImageContext.h"
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#import "GPUImageOutput.h"
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extern const GLfloat kColorConversion601[];
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extern const GLfloat kColorConversion601FullRange[];
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extern const GLfloat kColorConversion709[];
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extern NSString *const kGPUImageYUVVideoRangeConversionForRGFragmentShaderString;
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extern NSString *const kGPUImageYUVFullRangeConversionForLAFragmentShaderString;
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extern NSString *const kGPUImageYUVVideoRangeConversionForLAFragmentShaderString;
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//Delegate Protocal for Face Detection.
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@protocol GPUImageVideoCameraDelegate <NSObject>
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@optional
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- (void)willOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer;
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@end
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/**
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A GPUImageOutput that provides frames from either camera
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*/
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@interface GPUImageVideoCamera : GPUImageOutput <AVCaptureVideoDataOutputSampleBufferDelegate, AVCaptureAudioDataOutputSampleBufferDelegate>
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{
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NSUInteger numberOfFramesCaptured;
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CGFloat totalFrameTimeDuringCapture;
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AVCaptureSession *_captureSession;
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AVCaptureDevice *_inputCamera;
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AVCaptureDevice *_microphone;
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AVCaptureDeviceInput *videoInput;
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AVCaptureVideoDataOutput *videoOutput;
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BOOL capturePaused;
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GPUImageRotationMode outputRotation, internalRotation;
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dispatch_semaphore_t frameRenderingSemaphore;
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BOOL captureAsYUV;
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GLuint luminanceTexture, chrominanceTexture;
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__unsafe_unretained id<GPUImageVideoCameraDelegate> _delegate;
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}
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/// The AVCaptureSession used to capture from the camera
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@property(readonly, retain, nonatomic) AVCaptureSession *captureSession;
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/// This enables the capture session preset to be changed on the fly
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@property (readwrite, nonatomic, copy) NSString *captureSessionPreset;
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/// This sets the frame rate of the camera (iOS 5 and above only)
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/**
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Setting this to 0 or below will set the frame rate back to the default setting for a particular preset.
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*/
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@property (readwrite) int32_t frameRate;
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/// Easy way to tell which cameras are present on device
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@property (readonly, getter = isFrontFacingCameraPresent) BOOL frontFacingCameraPresent;
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@property (readonly, getter = isBackFacingCameraPresent) BOOL backFacingCameraPresent;
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/// This enables the benchmarking mode, which logs out instantaneous and average frame times to the console
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@property(readwrite, nonatomic) BOOL runBenchmark;
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/// Use this property to manage camera settings. Focus point, exposure point, etc.
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@property(readonly) AVCaptureDevice *inputCamera;
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/// This determines the rotation applied to the output image, based on the source material
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@property(readwrite, nonatomic) UIInterfaceOrientation outputImageOrientation;
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/// These properties determine whether or not the two camera orientations should be mirrored. By default, both are NO.
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@property(readwrite, nonatomic) BOOL horizontallyMirrorFrontFacingCamera, horizontallyMirrorRearFacingCamera;
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@property(nonatomic, assign) id<GPUImageVideoCameraDelegate> delegate;
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/// @name Initialization and teardown
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/** Begin a capture session
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See AVCaptureSession for acceptable values
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@param sessionPreset Session preset to use
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@param cameraPosition Camera to capture from
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*/
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- (id)initWithSessionPreset:(NSString *)sessionPreset cameraPosition:(AVCaptureDevicePosition)cameraPosition;
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/** Add audio capture to the session. Adding inputs and outputs freezes the capture session momentarily, so you
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can use this method to add the audio inputs and outputs early, if you're going to set the audioEncodingTarget
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later. Returns YES is the audio inputs and outputs were added, or NO if they had already been added.
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*/
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- (BOOL)addAudioInputsAndOutputs;
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/** Remove the audio capture inputs and outputs from this session. Returns YES if the audio inputs and outputs
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were removed, or NO is they hadn't already been added.
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*/
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- (BOOL)removeAudioInputsAndOutputs;
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/** Tear down the capture session
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*/
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- (void)removeInputsAndOutputs;
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/// @name Manage the camera video stream
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/** Start camera capturing
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*/
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- (void)startCameraCapture;
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/** Stop camera capturing
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*/
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- (void)stopCameraCapture;
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/** Pause camera capturing
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*/
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- (void)pauseCameraCapture;
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/** Resume camera capturing
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*/
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- (void)resumeCameraCapture;
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/** Process a video sample
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@param sampleBuffer Buffer to process
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*/
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- (void)processVideoSampleBuffer:(CMSampleBufferRef)sampleBuffer;
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/** Process an audio sample
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@param sampleBuffer Buffer to process
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*/
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- (void)processAudioSampleBuffer:(CMSampleBufferRef)sampleBuffer;
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/** Get the position (front, rear) of the source camera
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*/
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- (AVCaptureDevicePosition)cameraPosition;
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/** Get the AVCaptureConnection of the source camera
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*/
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- (AVCaptureConnection *)videoCaptureConnection;
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/** This flips between the front and rear cameras
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*/
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- (void)rotateCamera;
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/// @name Benchmarking
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/** When benchmarking is enabled, this will keep a running average of the time from uploading, processing, and final recording or display
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*/
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- (CGFloat)averageFrameDurationDuringCapture;
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- (void)resetBenchmarkAverage;
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+ (BOOL)isBackFacingCameraPresent;
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+ (BOOL)isFrontFacingCameraPresent;
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@end
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