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//
// SDLH264VideoEncoder
// SmartDeviceLink-iOS
//
// Created by Muller, Alexander (A.) on 12/5/16.
// Copyright © 2016 smartdevicelink. All rights reserved.
//
#import <Foundation/Foundation.h>
#import <VideoToolbox/VideoToolbox.h>
#import "SDLMacros.h"
#import "SDLVideoStreamingProtocol.h"
#import "SDLVideoEncoderDelegate.h"
@protocol SDLH264Packetizer;
NS_ASSUME_NONNULL_BEGIN
typedef NS_ENUM(NSInteger, SDLVideoEncoderError) {
SDLVideoEncoderErrorConfigurationCompressionSessionCreationFailure = 0,
SDLVideoEncoderErrorConfigurationAllocationFailure = 1,
SDLVideoEncoderErrorConfigurationCompressionSessionSetPropertyFailure = 2,
SDLVideoEncoderErrorProtocolUnknown = 3
};
extern NSString *const SDLErrorDomainVideoEncoder;
@interface SDLH264VideoEncoder : NSObject
@property (nonatomic, weak, nullable) id<SDLVideoEncoderDelegate> delegate;
/**
* The settings used in a VTCompressionSessionRef encoder. These will be verified when the video stream is started. Acceptable properties for this are located in VTCompressionProperties.
*
*/
@property (strong, nonatomic, readonly) NSDictionary<NSString *, id> *videoEncoderSettings;
@property (strong, nonatomic) id<SDLH264Packetizer> packetizer;
/**
* Provides default video encoder settings used.
*/
#if SDL_SUPPORTS_CLASS_PROPERTIES
@property (class, strong, nonatomic, readonly) NSDictionary<NSString *, id> *defaultVideoEncoderSettings;
#else
+ (NSDictionary<NSString *, id>*)defaultVideoEncoderSettings;
#endif
/**
* The pixel buffer pool reference returned back from an active VTCompressionSessionRef encoder.
*
* @warning This will only return a valid pixel buffer pool after the encoder has been initialized (when the video session has started).
* @discussion Clients may call this once and retain the resulting pool, this call is cheap enough that it's OK to call it once per frame.
*/
@property (assign, nonatomic, readonly) CVPixelBufferPoolRef CV_NULLABLE pixelBufferPool;
- (instancetype)init NS_UNAVAILABLE;
- (instancetype)initWithProtocol:(SDLVideoStreamingProtocol)protocol dimensions:(CGSize)dimensions properties:(NSDictionary<NSString *, id> *)properties delegate:(id<SDLVideoEncoderDelegate> __nullable)delegate error:(NSError **)error NS_DESIGNATED_INITIALIZER;
- (void)stop;
- (BOOL)encodeFrame:(CVImageBufferRef)imageBuffer;
- (BOOL)encodeFrame:(CVImageBufferRef)imageBuffer presentationTimestamp:(CMTime)presentationTimestamp;
/**
* Creates a new pixel buffer using the pixelBufferPool property.
*/
- (CVPixelBufferRef CV_NULLABLE)newPixelBuffer;
@end
NS_ASSUME_NONNULL_END
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