/*
 *  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 <WebRTC/RTCRtcpParameters.h>
#import <WebRTC/RTCRtpCodecParameters.h>
#import <WebRTC/RTCRtpEncodingParameters.h>
#import <WebRTC/RTCRtpHeaderExtension.h>
#import <WebRTC/RTCMacros.h>

NS_ASSUME_NONNULL_BEGIN

/** Corresponds to webrtc::DegradationPreference. */
typedef NS_ENUM(NSInteger, RTCDegradationPreference) {
  RTCDegradationPreferenceMaintainFramerateAndResolution,
  // TODO(webrtc:450044904): Switch downstream projects to
  // RTCDegradationPreferenceMaintainFramerateAndResolution and remove
  // RTCDegradationPreferenceDisabled.
  RTCDegradationPreferenceDisabled =
      RTCDegradationPreferenceMaintainFramerateAndResolution,
  RTCDegradationPreferenceMaintainFramerate,
  RTCDegradationPreferenceMaintainResolution,
  RTCDegradationPreferenceBalanced
};

RTC_OBJC_EXPORT
@interface RTC_OBJC_TYPE (RTCRtpParameters) : NSObject

/** A unique identifier for the last set of parameters applied. */
@property(nonatomic, copy) NSString *transactionId;

/** Parameters used for RTCP. */
@property(nonatomic, readonly, copy) RTC_OBJC_TYPE(RTCRtcpParameters) * rtcp;

/** An array containing parameters for RTP header extensions. */
@property(nonatomic, readonly, copy)
    NSArray<RTC_OBJC_TYPE(RTCRtpHeaderExtension) *> *headerExtensions;

/** The currently active encodings in the order of preference. */
@property(nonatomic, copy)
    NSArray<RTC_OBJC_TYPE(RTCRtpEncodingParameters) *> *encodings;

/** The negotiated set of send codecs in order of preference. */
@property(nonatomic, copy)
    NSArray<RTC_OBJC_TYPE(RTCRtpCodecParameters) *> *codecs;

/**
 * Degradation preference in case of CPU adaptation or constrained bandwidth.
 * If nil, implementation default degradation preference will be used.
 */
@property(nonatomic, copy, nullable) NSNumber *degradationPreference;

- (instancetype)init;

@end

NS_ASSUME_NONNULL_END
