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