83 lines
2.5 KiB
C
83 lines
2.5 KiB
C
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/*
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* Copyright 2016 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#import <Foundation/Foundation.h>
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#import "RTCMacros.h"
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#import "RTCMediaStreamTrack.h"
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#import "RTCRtpParameters.h"
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NS_ASSUME_NONNULL_BEGIN
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/** Represents the media type of the RtpReceiver. */
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typedef NS_ENUM(NSInteger, RTCRtpMediaType) {
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RTCRtpMediaTypeAudio,
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RTCRtpMediaTypeVideo,
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RTCRtpMediaTypeData,
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};
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@class RTCRtpReceiver;
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RTC_OBJC_EXPORT
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@protocol RTCRtpReceiverDelegate <NSObject>
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/** Called when the first RTP packet is received.
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*
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* Note: Currently if there are multiple RtpReceivers of the same media type,
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* they will all call OnFirstPacketReceived at once.
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*
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* For example, if we create three audio receivers, A/B/C, they will listen to
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* the same signal from the underneath network layer. Whenever the first audio packet
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* is received, the underneath signal will be fired. All the receivers A/B/C will be
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* notified and the callback of the receiver's delegate will be called.
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*
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* The process is the same for video receivers.
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*/
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- (void)rtpReceiver:(RTCRtpReceiver *)rtpReceiver
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didReceiveFirstPacketForMediaType:(RTCRtpMediaType)mediaType;
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@end
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RTC_OBJC_EXPORT
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@protocol RTCRtpReceiver <NSObject>
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/** A unique identifier for this receiver. */
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@property(nonatomic, readonly) NSString *receiverId;
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/** The currently active RTCRtpParameters, as defined in
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* https://www.w3.org/TR/webrtc/#idl-def-RTCRtpParameters.
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*
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* The WebRTC specification only defines RTCRtpParameters in terms of senders,
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* but this API also applies them to receivers, similar to ORTC:
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* http://ortc.org/wp-content/uploads/2016/03/ortc.html#rtcrtpparameters*.
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*/
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@property(nonatomic, readonly) RTCRtpParameters *parameters;
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/** The RTCMediaStreamTrack associated with the receiver.
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* Note: reading this property returns a new instance of
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* RTCMediaStreamTrack. Use isEqual: instead of == to compare
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* RTCMediaStreamTrack instances.
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*/
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@property(nonatomic, readonly, nullable) RTCMediaStreamTrack *track;
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/** The delegate for this RtpReceiver. */
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@property(nonatomic, weak) id<RTCRtpReceiverDelegate> delegate;
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@end
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RTC_OBJC_EXPORT
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@interface RTCRtpReceiver : NSObject <RTCRtpReceiver>
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- (instancetype)init NS_UNAVAILABLE;
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@end
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NS_ASSUME_NONNULL_END
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