1 /*
2  *  Copyright 2016 The WebRTC project authors. All Rights Reserved.
3  *
4  *  Use of this source code is governed by a BSD-style license
5  *  that can be found in the LICENSE file in the root of the source
6  *  tree. An additional intellectual property rights grant can be found
7  *  in the file PATENTS.  All contributing project authors may
8  *  be found in the AUTHORS file in the root of the source tree.
9  */
10 
11 #import <Foundation/Foundation.h>
12 
13 #import "RTCMacros.h"
14 #import "RTCRtcpParameters.h"
15 #import "RTCRtpCodecParameters.h"
16 #import "RTCRtpEncodingParameters.h"
17 #import "RTCRtpHeaderExtension.h"
18 
19 NS_ASSUME_NONNULL_BEGIN
20 
21 /** Corresponds to webrtc::DegradationPreference. */
22 typedef NS_ENUM(NSInteger, RTCDegradationPreference) {
23   RTCDegradationPreferenceDisabled,
24   RTCDegradationPreferenceMaintainFramerate,
25   RTCDegradationPreferenceMaintainResolution,
26   RTCDegradationPreferenceBalanced
27 };
28 
29 RTC_OBJC_EXPORT
30 @interface RTC_OBJC_TYPE (RTCRtpParameters) : NSObject
31 
32 /** A unique identifier for the last set of parameters applied. */
33 @property(nonatomic, copy) NSString *transactionId;
34 
35 /** Parameters used for RTCP. */
36 @property(nonatomic, readonly, copy) RTC_OBJC_TYPE(RTCRtcpParameters) * rtcp;
37 
38 /** An array containing parameters for RTP header extensions. */
39 @property(nonatomic, readonly, copy)
40     NSArray<RTC_OBJC_TYPE(RTCRtpHeaderExtension) *> *headerExtensions;
41 
42 /** The currently active encodings in the order of preference. */
43 @property(nonatomic, copy) NSArray<RTC_OBJC_TYPE(RTCRtpEncodingParameters) *> *encodings;
44 
45 /** The negotiated set of send codecs in order of preference. */
46 @property(nonatomic, copy) NSArray<RTC_OBJC_TYPE(RTCRtpCodecParameters) *> *codecs;
47 
48 /**
49  * Degradation preference in case of CPU adaptation or constrained bandwidth.
50  * If nil, implementation default degradation preference will be used.
51  */
52 @property(nonatomic, copy, nullable) NSNumber *degradationPreference;
53 
54 - (instancetype)init NS_DESIGNATED_INITIALIZER;
55 
56 @end
57 
58 NS_ASSUME_NONNULL_END
59