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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 <WebRTC/RTCMacros.h>
#import <WebRTC/RTCVideoFrame.h>
NS_ASSUME_NONNULL_BEGIN
RTC_EXPORT extern NSString *const kRTCVideoCodecVp8Name;
RTC_EXPORT extern NSString *const kRTCVideoCodecVp9Name;
RTC_EXPORT extern NSString *const kRTCVideoCodecH264Name;
RTC_EXPORT extern NSString *const kRTCLevel31ConstrainedHigh;
RTC_EXPORT extern NSString *const kRTCLevel31ConstrainedBaseline;
RTC_EXPORT extern NSString *const kRTCMaxSupportedH264ProfileLevelConstrainedHigh;
RTC_EXPORT extern NSString *const kRTCMaxSupportedH264ProfileLevelConstrainedBaseline;
/** Represents an encoded frame's type. */
typedef NS_ENUM(NSUInteger, RTCFrameType) {
RTCFrameTypeEmptyFrame = 0,
RTCFrameTypeAudioFrameSpeech = 1,
RTCFrameTypeAudioFrameCN = 2,
RTCFrameTypeVideoFrameKey = 3,
RTCFrameTypeVideoFrameDelta = 4,
};
typedef NS_ENUM(NSUInteger, RTCVideoContentType) {
RTCVideoContentTypeUnspecified,
RTCVideoContentTypeScreenshare,
};
/** Represents an encoded frame. Corresponds to webrtc::EncodedImage. */
RTC_EXPORT
@interface RTCEncodedImage : NSObject
@property(nonatomic, strong) NSData *buffer;
@property(nonatomic, assign) int32_t encodedWidth;
@property(nonatomic, assign) int32_t encodedHeight;
@property(nonatomic, assign) uint32_t timeStamp;
@property(nonatomic, assign) int64_t captureTimeMs;
@property(nonatomic, assign) int64_t ntpTimeMs;
@property(nonatomic, assign) uint8_t flags;
@property(nonatomic, assign) int64_t encodeStartMs;
@property(nonatomic, assign) int64_t encodeFinishMs;
@property(nonatomic, assign) RTCFrameType frameType;
@property(nonatomic, assign) RTCVideoRotation rotation;
@property(nonatomic, assign) BOOL completeFrame;
@property(nonatomic, strong) NSNumber *qp;
@property(nonatomic, assign) RTCVideoContentType contentType;
@end
/** Information for header. Corresponds to webrtc::RTPFragmentationHeader. */
RTC_EXPORT
@interface RTCRtpFragmentationHeader : NSObject
@property(nonatomic, strong) NSArray<NSNumber *> *fragmentationOffset;
@property(nonatomic, strong) NSArray<NSNumber *> *fragmentationLength;
@property(nonatomic, strong) NSArray<NSNumber *> *fragmentationTimeDiff;
@property(nonatomic, strong) NSArray<NSNumber *> *fragmentationPlType;
@end
/** Implement this protocol to pass codec specific info from the encoder.
* Corresponds to webrtc::CodecSpecificInfo.
*/
RTC_EXPORT
@protocol RTCCodecSpecificInfo <NSObject>
@end
/** Callback block for encoder. */
typedef BOOL (^RTCVideoEncoderCallback)(RTCEncodedImage *frame,
id<RTCCodecSpecificInfo> info,
RTCRtpFragmentationHeader *header);
/** Callback block for decoder. */
typedef void (^RTCVideoDecoderCallback)(RTCVideoFrame *frame);
typedef NS_ENUM(NSUInteger, RTCVideoCodecMode) {
RTCVideoCodecModeRealtimeVideo,
RTCVideoCodecModeScreensharing,
};
/** Holds information to identify a codec. Corresponds to webrtc::SdpVideoFormat. */
RTC_EXPORT
@interface RTCVideoCodecInfo : NSObject <NSCoding>
- (instancetype)init NS_UNAVAILABLE;
- (instancetype)initWithName:(NSString *)name;
- (instancetype)initWithName:(NSString *)name
parameters:(nullable NSDictionary<NSString *, NSString *> *)parameters
NS_DESIGNATED_INITIALIZER;
- (BOOL)isEqualToCodecInfo:(RTCVideoCodecInfo *)info;
@property(nonatomic, readonly) NSString *name;
@property(nonatomic, readonly) NSDictionary<NSString *, NSString *> *parameters;
@end
/** Settings for encoder. Corresponds to webrtc::VideoCodec. */
RTC_EXPORT
@interface RTCVideoEncoderSettings : NSObject
@property(nonatomic, strong) NSString *name;
@property(nonatomic, assign) unsigned short width;
@property(nonatomic, assign) unsigned short height;
@property(nonatomic, assign) unsigned int startBitrate; // kilobits/sec.
@property(nonatomic, assign) unsigned int maxBitrate;
@property(nonatomic, assign) unsigned int minBitrate;
@property(nonatomic, assign) unsigned int targetBitrate;
@property(nonatomic, assign) uint32_t maxFramerate;
@property(nonatomic, assign) unsigned int qpMax;
@property(nonatomic, assign) RTCVideoCodecMode mode;
@end
/** QP thresholds for encoder. Corresponds to webrtc::VideoEncoder::QpThresholds. */
RTC_EXPORT
@interface RTCVideoEncoderQpThresholds : NSObject
- (instancetype)initWithThresholdsLow:(NSInteger)low high:(NSInteger)high;
@property(nonatomic, readonly) NSInteger low;
@property(nonatomic, readonly) NSInteger high;
@end
/** Protocol for encoder implementations. */
RTC_EXPORT
@protocol RTCVideoEncoder <NSObject>
- (void)setCallback:(RTCVideoEncoderCallback)callback;
- (NSInteger)startEncodeWithSettings:(RTCVideoEncoderSettings *)settings
numberOfCores:(int)numberOfCores;
- (NSInteger)releaseEncoder;
- (NSInteger)encode:(RTCVideoFrame *)frame
codecSpecificInfo:(nullable id<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. */
- (RTCVideoEncoderQpThresholds *)scalingSettings;
@end
/** Protocol for decoder implementations. */
RTC_EXPORT
@protocol RTCVideoDecoder <NSObject>
- (void)setCallback:(RTCVideoDecoderCallback)callback;
- (NSInteger)startDecodeWithSettings:(RTCVideoEncoderSettings *)settings
numberOfCores:(int)numberOfCores
DEPRECATED_MSG_ATTRIBUTE("use startDecodeWithNumberOfCores: instead");
- (NSInteger)releaseDecoder;
- (NSInteger)decode:(RTCEncodedImage *)encodedImage
missingFrames:(BOOL)missingFrames
codecSpecificInfo:(nullable id<RTCCodecSpecificInfo>)info
renderTimeMs:(int64_t)renderTimeMs;
- (NSString *)implementationName;
// TODO(andersc): Make non-optional when `startDecodeWithSettings:numberOfCores:` is removed.
@optional
- (NSInteger)startDecodeWithNumberOfCores:(int)numberOfCores;
@end
NS_ASSUME_NONNULL_END