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/*
* Copyright 2017 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#import <Foundation/Foundation.h>
#import "RTCCodecSpecificInfo.h"
#import "RTCEncodedImage.h"
#import "RTCMacros.h"
#import "RTCVideoEncoderQpThresholds.h"
#import "RTCVideoEncoderSettings.h"
#import "RTCVideoFrame.h"
NS_ASSUME_NONNULL_BEGIN
/** Callback block for encoder. */
typedef BOOL (^RTCVideoEncoderCallback)(RTC_OBJC_TYPE(RTCEncodedImage) * frame,
id<RTC_OBJC_TYPE(RTCCodecSpecificInfo)> info);
/** Protocol for encoder implementations. */
RTC_OBJC_EXPORT
@protocol RTC_OBJC_TYPE
(RTCVideoEncoder)<NSObject>
- (void)setCallback:(nullable RTCVideoEncoderCallback)callback;
- (NSInteger)startEncodeWithSettings:(RTC_OBJC_TYPE(RTCVideoEncoderSettings) *)settings
numberOfCores:(int)numberOfCores;
- (NSInteger)releaseEncoder;
- (NSInteger)encode:(RTC_OBJC_TYPE(RTCVideoFrame) *)frame
codecSpecificInfo:(nullable id<RTC_OBJC_TYPE(RTCCodecSpecificInfo)>)info
frameTypes:(NSArray<NSNumber *> *)frameTypes;
- (int)setBitrate:(uint32_t)bitrateKbit framerate:(uint32_t)framerate;
- (NSString *)implementationName;
/** Returns QP scaling settings for encoder. The quality scaler adjusts the resolution in order to
* keep the QP from the encoded images within the given range. Returning nil from this function
* disables quality scaling. */
- (nullable RTC_OBJC_TYPE(RTCVideoEncoderQpThresholds) *)scalingSettings;
/** Resolutions should be aligned to this value. */
@property(nonatomic, readonly) NSInteger resolutionAlignment;
/** If enabled, resolution alignment is applied to all simulcast layers simultaneously so that when
scaled, all resolutions comply with 'resolutionAlignment'. */
@property(nonatomic, readonly) BOOL applyAlignmentToAllSimulcastLayers;
/** If YES, the receiver is expected to resample/scale the source texture to the expected output
size. */
@property(nonatomic, readonly) BOOL supportsNativeHandle;
@end
NS_ASSUME_NONNULL_END
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