ObjC: Implement HW codecs in ObjC instead of C++

webrtc/sdk/objc/Framework/Headers/WebRTC/RTCVideoCodec.h

 /*
  *  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>
 
 @class RTCVideoFrame;
 
 NS_ASSUME_NONNULL_BEGIN
 
 /** Represents an encoded frame's type. */
 typedef NS_ENUM(NSUInteger, RTCFrameType) {
-  RTCFrameTypeEmptyFrame,
-  RTCFrameTypeVideoFrameKey,
-  RTCFrameTypeVideoFrameDelta,
+  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) int encodedWidth;
 @property(nonatomic, assign) int encodedHeight;
 @property(nonatomic, assign) uint32_t timeStamp;
 @property(nonatomic, assign) long captureTimeMs;
 @property(nonatomic, assign) long ntpTimeMs;
 @property(nonatomic, assign) BOOL isTimingFrame;
 @property(nonatomic, assign) long encodeStartMs;
 @property(nonatomic, assign) long encodeFinishMs;
 @property(nonatomic, assign) RTCFrameType frameType;
 @property(nonatomic, assign) int 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
 
+/** Class for H264 specific config. */
+typedef NS_ENUM(NSUInteger, RTCH264PacketizationMode) {
+  RTCH264PacketizationModeNonInterleaved = 0,  // Mode 1 - STAP-A, FU-A is allowed
+  RTCH264PacketizationModeSingleNalUnit        // Mode 0 - only single NALU allowed
+};
+
+RTC_EXPORT
+@interface RTCCodecSpecificInfoH264 : NSObject<RTCCodecSpecificInfo>
+
+@property(nonatomic, assign) RTCH264PacketizationMode packetizationMode;
+
+@end
+
 /** Callback block for encoder. */
-typedef void (^RTCVideoEncoderCallback)(RTCEncodedImage *frame,
+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 cricket::VideoCodec. */
 RTC_EXPORT
 @interface RTCVideoCodecInfo : NSObject
 
 - (instancetype)initWithPayload:(NSInteger)payload
                            name:(NSString *)name
                      parameters:(NSDictionary<NSString *, NSString *> *)parameters;
 
 @property(nonatomic, readonly) NSInteger payload;
 @property(nonatomic, readonly) NSString *name;
@@ skipping 11 matching lines @@
 @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;
-- (void)destroy;
 - (NSInteger)encode:(RTCVideoFrame *)frame
     codecSpecificInfo:(id<RTCCodecSpecificInfo>)info
            frameTypes:(NSArray<NSNumber *> *)frameTypes;
-- (BOOL)setBitrate:(uint32_t)bitrateKbit framerate:(uint32_t)framerate;
+- (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;
 - (NSInteger)releaseDecoder;
-- (void)destroy;
 - (NSInteger)decode:(RTCEncodedImage *)encodedImage
           missingFrames:(BOOL)missingFrames
     fragmentationHeader:(RTCRtpFragmentationHeader *)fragmentationHeader
       codecSpecificInfo:(__nullable id<RTCCodecSpecificInfo>)info
            renderTimeMs:(int64_t)renderTimeMs;
 - (NSString *)implementationName;
 
 @end
 
 NS_ASSUME_NONNULL_END