349 lines
14 KiB
C
349 lines
14 KiB
C
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/*
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* Copyright 2015 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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@class RTCConfiguration;
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@class RTCDataChannel;
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@class RTCDataChannelConfiguration;
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@class RTCIceCandidate;
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@class RTCMediaConstraints;
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@class RTCMediaStream;
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@class RTCMediaStreamTrack;
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@class RTCPeerConnectionFactory;
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@class RTCRtpReceiver;
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@class RTCRtpSender;
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@class RTCRtpTransceiver;
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@class RTCRtpTransceiverInit;
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@class RTCSessionDescription;
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@class RTCStatisticsReport;
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@class RTCLegacyStatsReport;
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typedef NS_ENUM(NSInteger, RTCRtpMediaType);
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NS_ASSUME_NONNULL_BEGIN
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extern NSString *const kRTCPeerConnectionErrorDomain;
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extern int const kRTCSessionDescriptionErrorCode;
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/** Represents the signaling state of the peer connection. */
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typedef NS_ENUM(NSInteger, RTCSignalingState) {
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RTCSignalingStateStable,
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RTCSignalingStateHaveLocalOffer,
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RTCSignalingStateHaveLocalPrAnswer,
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RTCSignalingStateHaveRemoteOffer,
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RTCSignalingStateHaveRemotePrAnswer,
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// Not an actual state, represents the total number of states.
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RTCSignalingStateClosed,
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};
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/** Represents the ice connection state of the peer connection. */
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typedef NS_ENUM(NSInteger, RTCIceConnectionState) {
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RTCIceConnectionStateNew,
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RTCIceConnectionStateChecking,
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RTCIceConnectionStateConnected,
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RTCIceConnectionStateCompleted,
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RTCIceConnectionStateFailed,
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RTCIceConnectionStateDisconnected,
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RTCIceConnectionStateClosed,
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RTCIceConnectionStateCount,
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};
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/** Represents the combined ice+dtls connection state of the peer connection. */
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typedef NS_ENUM(NSInteger, RTCPeerConnectionState) {
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RTCPeerConnectionStateNew,
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RTCPeerConnectionStateConnecting,
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RTCPeerConnectionStateConnected,
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RTCPeerConnectionStateDisconnected,
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RTCPeerConnectionStateFailed,
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RTCPeerConnectionStateClosed,
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};
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/** Represents the ice gathering state of the peer connection. */
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typedef NS_ENUM(NSInteger, RTCIceGatheringState) {
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RTCIceGatheringStateNew,
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RTCIceGatheringStateGathering,
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RTCIceGatheringStateComplete,
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};
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/** Represents the stats output level. */
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typedef NS_ENUM(NSInteger, RTCStatsOutputLevel) {
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RTCStatsOutputLevelStandard,
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RTCStatsOutputLevelDebug,
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};
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@class RTCPeerConnection;
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RTC_OBJC_EXPORT
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@protocol RTCPeerConnectionDelegate <NSObject>
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/** Called when the SignalingState changed. */
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- (void)peerConnection:(RTCPeerConnection *)peerConnection
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didChangeSignalingState:(RTCSignalingState)stateChanged;
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/** Called when media is received on a new stream from remote peer. */
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- (void)peerConnection:(RTCPeerConnection *)peerConnection didAddStream:(RTCMediaStream *)stream;
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/** Called when a remote peer closes a stream.
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* This is not called when RTCSdpSemanticsUnifiedPlan is specified.
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*/
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- (void)peerConnection:(RTCPeerConnection *)peerConnection didRemoveStream:(RTCMediaStream *)stream;
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/** Called when negotiation is needed, for example ICE has restarted. */
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- (void)peerConnectionShouldNegotiate:(RTCPeerConnection *)peerConnection;
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/** Called any time the IceConnectionState changes. */
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- (void)peerConnection:(RTCPeerConnection *)peerConnection
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didChangeIceConnectionState:(RTCIceConnectionState)newState;
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/** Called any time the IceGatheringState changes. */
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- (void)peerConnection:(RTCPeerConnection *)peerConnection
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didChangeIceGatheringState:(RTCIceGatheringState)newState;
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/** New ice candidate has been found. */
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- (void)peerConnection:(RTCPeerConnection *)peerConnection
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didGenerateIceCandidate:(RTCIceCandidate *)candidate;
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/** Called when a group of local Ice candidates have been removed. */
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- (void)peerConnection:(RTCPeerConnection *)peerConnection
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didRemoveIceCandidates:(NSArray<RTCIceCandidate *> *)candidates;
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/** New data channel has been opened. */
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- (void)peerConnection:(RTCPeerConnection *)peerConnection
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didOpenDataChannel:(RTCDataChannel *)dataChannel;
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/** Called when signaling indicates a transceiver will be receiving media from
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* the remote endpoint.
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* This is only called with RTCSdpSemanticsUnifiedPlan specified.
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*/
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@optional
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/** Called any time the PeerConnectionState changes. */
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- (void)peerConnection:(RTCPeerConnection *)peerConnection
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didChangeConnectionState:(RTCPeerConnectionState)newState;
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- (void)peerConnection:(RTCPeerConnection *)peerConnection
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didStartReceivingOnTransceiver:(RTCRtpTransceiver *)transceiver;
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/** Called when a receiver and its track are created. */
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- (void)peerConnection:(RTCPeerConnection *)peerConnection
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didAddReceiver:(RTCRtpReceiver *)rtpReceiver
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streams:(NSArray<RTCMediaStream *> *)mediaStreams;
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/** Called when the receiver and its track are removed. */
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- (void)peerConnection:(RTCPeerConnection *)peerConnection
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didRemoveReceiver:(RTCRtpReceiver *)rtpReceiver;
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@end
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RTC_OBJC_EXPORT
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@interface RTCPeerConnection : NSObject
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/** The object that will be notifed about events such as state changes and
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* streams being added or removed.
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*/
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@property(nonatomic, weak, nullable) id<RTCPeerConnectionDelegate> delegate;
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/** This property is not available with RTCSdpSemanticsUnifiedPlan. Please use
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* |senders| instead.
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*/
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@property(nonatomic, readonly) NSArray<RTCMediaStream *> *localStreams;
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@property(nonatomic, readonly, nullable) RTCSessionDescription *localDescription;
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@property(nonatomic, readonly, nullable) RTCSessionDescription *remoteDescription;
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@property(nonatomic, readonly) RTCSignalingState signalingState;
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@property(nonatomic, readonly) RTCIceConnectionState iceConnectionState;
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@property(nonatomic, readonly) RTCPeerConnectionState connectionState;
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@property(nonatomic, readonly) RTCIceGatheringState iceGatheringState;
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@property(nonatomic, readonly, copy) RTCConfiguration *configuration;
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/** Gets all RTCRtpSenders associated with this peer connection.
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* Note: reading this property returns different instances of RTCRtpSender.
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* Use isEqual: instead of == to compare RTCRtpSender instances.
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*/
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@property(nonatomic, readonly) NSArray<RTCRtpSender *> *senders;
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/** Gets all RTCRtpReceivers associated with this peer connection.
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* Note: reading this property returns different instances of RTCRtpReceiver.
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* Use isEqual: instead of == to compare RTCRtpReceiver instances.
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*/
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@property(nonatomic, readonly) NSArray<RTCRtpReceiver *> *receivers;
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/** Gets all RTCRtpTransceivers associated with this peer connection.
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* Note: reading this property returns different instances of
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* RTCRtpTransceiver. Use isEqual: instead of == to compare RTCRtpTransceiver
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* instances.
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* This is only available with RTCSdpSemanticsUnifiedPlan specified.
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*/
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@property(nonatomic, readonly) NSArray<RTCRtpTransceiver *> *transceivers;
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- (instancetype)init NS_UNAVAILABLE;
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/** Sets the PeerConnection's global configuration to |configuration|.
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* Any changes to STUN/TURN servers or ICE candidate policy will affect the
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* next gathering phase, and cause the next call to createOffer to generate
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* new ICE credentials. Note that the BUNDLE and RTCP-multiplexing policies
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* cannot be changed with this method.
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*/
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- (BOOL)setConfiguration:(RTCConfiguration *)configuration;
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/** Terminate all media and close the transport. */
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- (void)close;
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/** Provide a remote candidate to the ICE Agent. */
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- (void)addIceCandidate:(RTCIceCandidate *)candidate;
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/** Remove a group of remote candidates from the ICE Agent. */
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- (void)removeIceCandidates:(NSArray<RTCIceCandidate *> *)candidates;
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/** Add a new media stream to be sent on this peer connection.
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* This method is not supported with RTCSdpSemanticsUnifiedPlan. Please use
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* addTrack instead.
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*/
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- (void)addStream:(RTCMediaStream *)stream;
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/** Remove the given media stream from this peer connection.
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* This method is not supported with RTCSdpSemanticsUnifiedPlan. Please use
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* removeTrack instead.
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*/
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- (void)removeStream:(RTCMediaStream *)stream;
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/** Add a new media stream track to be sent on this peer connection, and return
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* the newly created RTCRtpSender. The RTCRtpSender will be associated with
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* the streams specified in the |streamIds| list.
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*
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* Errors: If an error occurs, returns nil. An error can occur if:
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* - A sender already exists for the track.
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* - The peer connection is closed.
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*/
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- (RTCRtpSender *)addTrack:(RTCMediaStreamTrack *)track streamIds:(NSArray<NSString *> *)streamIds;
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/** With PlanB semantics, removes an RTCRtpSender from this peer connection.
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*
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* With UnifiedPlan semantics, sets sender's track to null and removes the
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* send component from the associated RTCRtpTransceiver's direction.
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*
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* Returns YES on success.
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*/
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- (BOOL)removeTrack:(RTCRtpSender *)sender;
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/** addTransceiver creates a new RTCRtpTransceiver and adds it to the set of
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* transceivers. Adding a transceiver will cause future calls to CreateOffer
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* to add a media description for the corresponding transceiver.
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*
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* The initial value of |mid| in the returned transceiver is nil. Setting a
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* new session description may change it to a non-nil value.
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*
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* https://w3c.github.io/webrtc-pc/#dom-rtcpeerconnection-addtransceiver
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*
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* Optionally, an RtpTransceiverInit structure can be specified to configure
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* the transceiver from construction. If not specified, the transceiver will
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* default to having a direction of kSendRecv and not be part of any streams.
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*
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* These methods are only available when Unified Plan is enabled (see
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* RTCConfiguration).
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*/
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/** Adds a transceiver with a sender set to transmit the given track. The kind
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* of the transceiver (and sender/receiver) will be derived from the kind of
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* the track.
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*/
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- (RTCRtpTransceiver *)addTransceiverWithTrack:(RTCMediaStreamTrack *)track;
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- (RTCRtpTransceiver *)addTransceiverWithTrack:(RTCMediaStreamTrack *)track
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init:(RTCRtpTransceiverInit *)init;
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/** Adds a transceiver with the given kind. Can either be RTCRtpMediaTypeAudio
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* or RTCRtpMediaTypeVideo.
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*/
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- (RTCRtpTransceiver *)addTransceiverOfType:(RTCRtpMediaType)mediaType;
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- (RTCRtpTransceiver *)addTransceiverOfType:(RTCRtpMediaType)mediaType
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init:(RTCRtpTransceiverInit *)init;
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/** Generate an SDP offer. */
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- (void)offerForConstraints:(RTCMediaConstraints *)constraints
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completionHandler:(nullable void (^)(RTCSessionDescription *_Nullable sdp,
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NSError *_Nullable error))completionHandler;
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/** Generate an SDP answer. */
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- (void)answerForConstraints:(RTCMediaConstraints *)constraints
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completionHandler:(nullable void (^)(RTCSessionDescription *_Nullable sdp,
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NSError *_Nullable error))completionHandler;
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/** Apply the supplied RTCSessionDescription as the local description. */
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- (void)setLocalDescription:(RTCSessionDescription *)sdp
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completionHandler:(nullable void (^)(NSError *_Nullable error))completionHandler;
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/** Apply the supplied RTCSessionDescription as the remote description. */
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- (void)setRemoteDescription:(RTCSessionDescription *)sdp
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completionHandler:(nullable void (^)(NSError *_Nullable error))completionHandler;
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/** Limits the bandwidth allocated for all RTP streams sent by this
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* PeerConnection. Nil parameters will be unchanged. Setting
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* |currentBitrateBps| will force the available bitrate estimate to the given
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* value. Returns YES if the parameters were successfully updated.
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*/
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- (BOOL)setBweMinBitrateBps:(nullable NSNumber *)minBitrateBps
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currentBitrateBps:(nullable NSNumber *)currentBitrateBps
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maxBitrateBps:(nullable NSNumber *)maxBitrateBps;
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/** Start or stop recording an Rtc EventLog. */
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- (BOOL)startRtcEventLogWithFilePath:(NSString *)filePath maxSizeInBytes:(int64_t)maxSizeInBytes;
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- (void)stopRtcEventLog;
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@end
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@interface RTCPeerConnection (Media)
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/** Create an RTCRtpSender with the specified kind and media stream ID.
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* See RTCMediaStreamTrack.h for available kinds.
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* This method is not supported with RTCSdpSemanticsUnifiedPlan. Please use
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* addTransceiver instead.
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*/
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- (RTCRtpSender *)senderWithKind:(NSString *)kind streamId:(NSString *)streamId;
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@end
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@interface RTCPeerConnection (DataChannel)
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/** Create a new data channel with the given label and configuration. */
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- (nullable RTCDataChannel *)dataChannelForLabel:(NSString *)label
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configuration:(RTCDataChannelConfiguration *)configuration;
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@end
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typedef void (^RTCStatisticsCompletionHandler)(RTCStatisticsReport *);
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@interface RTCPeerConnection (Stats)
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/** Gather stats for the given RTCMediaStreamTrack. If |mediaStreamTrack| is nil
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* statistics are gathered for all tracks.
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*/
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- (void)statsForTrack:(nullable RTCMediaStreamTrack *)mediaStreamTrack
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statsOutputLevel:(RTCStatsOutputLevel)statsOutputLevel
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completionHandler:(nullable void (^)(NSArray<RTCLegacyStatsReport *> *stats))completionHandler;
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/** Gather statistic through the v2 statistics API. */
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- (void)statisticsWithCompletionHandler:(RTCStatisticsCompletionHandler)completionHandler;
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/** Spec-compliant getStats() performing the stats selection algorithm with the
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* sender.
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*/
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- (void)statisticsForSender:(RTCRtpSender *)sender
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completionHandler:(RTCStatisticsCompletionHandler)completionHandler;
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/** Spec-compliant getStats() performing the stats selection algorithm with the
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* receiver.
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*/
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- (void)statisticsForReceiver:(RTCRtpReceiver *)receiver
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completionHandler:(RTCStatisticsCompletionHandler)completionHandler;
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@end
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NS_ASSUME_NONNULL_END
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