Update API for Objective-C RTCPeerConnection.

webrtc/api/objc/RTCPeerConnection.h

Index: webrtc/api/objc/RTCPeerConnection.h
diff --git a/webrtc/api/objc/RTCPeerConnection.h b/webrtc/api/objc/RTCPeerConnection.h
new file mode 100644
index 0000000000000000000000000000000000000000..733a86779848cae07ecef407a6a4d382721400a9
--- /dev/null
+++ b/webrtc/api/objc/RTCPeerConnection.h
@@ -0,0 +1,190 @@
+/*
+ *  Copyright 2015 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/api/objc/RTCPeerConnection.h"

[tkchin_webrtc, 2016/02/05 16:15:16]

? :)

[hjon_webrtc, 2016/02/09 00:59:53]

Oops. Fixed. :-)

+
+@class RTCConfiguration;
+@class RTCDataChannel;
+@class RTCDataChannelConfiguration;
+@class RTCIceCandidate;
+@class RTCMediaConstraints;
+@class RTCMediaStream;
+@class RTCMediaStreamTrack;
+@class RTCPeerConnectionFactory;
+@class RTCSessionDescription;
+@class RTCStatsReport;
+
+extern NSString * _Nonnull const kRTCPeerConnectionErrorDomain;

[tkchin_webrtc, 2016/02/05 16:15:16]

don't need _Nonnull here?

[hjon_webrtc, 2016/02/09 00:59:54]

I didn't expect so, but I got this error without it:

RTCPeerConnection.h:24:17: error: pointer is missing a nullability type
specifier (_Nonnull, _Nullable, or _Null_unspecified)
[-Werror,-Wnullability-completeness]

Alternatively, I could make sure this line is within NS_ASSUME_NONNULL_BEGIN.
Thoughts style-wise?

[tkchin_webrtc, 2016/02/10 18:54:40]

Yeah just move the NONNULL_BEGIN up

[hjon_webrtc, 2016/02/11 00:25:07]

Done.

+extern int const kRTCSessionDescriptionErrorCode;
+
+/** Represents the signaling state of the peer connection. */
+typedef NS_ENUM(NSInteger, RTCSignalingState) {
+  RTCSignalingStateStable,
+  RTCSignalingStateHaveLocalOffer,
+  RTCSignalingStateHaveLocalPrAnswer,
+  RTCSignalingStateHaveRemoteOffer,
+  RTCSignalingStateHaveRemotePrAnswer,
+  RTCSignalingStateClosed,
+};
+
+/** Represents the ice connection state of the peer connection. */
+typedef NS_ENUM(NSInteger, RTCIceConnectionState) {
+  RTCIceConnectionStateNew,
+  RTCIceConnectionStateChecking,
+  RTCIceConnectionStateConnected,
+  RTCIceConnectionStateCompleted,
+  RTCIceConnectionStateFailed,
+  RTCIceConnectionStateDisconnected,
+  RTCIceConnectionStateClosed,
+  RTCIceConnectionStateMax,
+};
+
+/** Represents the ice gathering state of the peer connection. */
+typedef NS_ENUM(NSInteger, RTCIceGatheringState) {
+  RTCIceGatheringStateNew,
+  RTCIceGatheringStateGathering,
+  RTCIceGatheringStateComplete,
+};
+
+/** Represents the stats output level. */
+typedef NS_ENUM(NSInteger, RTCStatsOutputLevel) {
+  RTCStatsOutputLevelStandard,
+  RTCStatsOutputLevelDebug,
+};
+
+NS_ASSUME_NONNULL_BEGIN
+
+@class RTCPeerConnection;
+
+@protocol RTCPeerConnectionDelegate <NSObject>
+
+/** Called when the SignalingState changed. */
+- (void)peerConnection:(RTCPeerConnection *)peerConnection
+    signalingStateChanged:(RTCSignalingState)stateChanged;

[tkchin_webrtc, 2016/02/05 16:15:16]

didChangeSignalingState

[hjon_webrtc, 2016/02/09 00:59:53]

Done.

+
+/** Triggered when media is received on a new stream from remote peer. */

[tkchin_webrtc, 2016/02/05 16:15:15]

ditto nit triggered

[hjon_webrtc, 2016/02/09 00:59:54]

Done.

+- (void)peerConnection:(RTCPeerConnection *)peerConnection
+           addedStream:(RTCMediaStream *)stream;
+
+/** Triggered when a remote peer closes a stream. */
+- (void)peerConnection:(RTCPeerConnection *)peerConnection
+         removedStream:(RTCMediaStream *)stream;
+
+/** Triggered when renegotiation is needed, for example ICE has restarted. */
+- (void)peerConnectionNeedsRenegotiation:(RTCPeerConnection *)peerConnection;

[tkchin_webrtc, 2016/02/05 16:15:15]

peerConnectionShouldNegotiate

I don't think it's renegotation? Can you check?

[hjon_webrtc, 2016/02/09 00:59:53]

You're right; the spec says negotiation, not renegotiation. Changed.

+
+/** Called any time the IceConnectionState changes. */
+- (void)peerConnection:(RTCPeerConnection *)peerConnection
+    iceConnectionStateChanged:(RTCIceConnectionState)newState;

[tkchin_webrtc, 2016/02/05 16:15:16]

didChangeIceConnectionState

[hjon_webrtc, 2016/02/09 00:59:53]

Done.

+
+/** Called any time the IceGatheringState changes. */
+- (void)peerConnection:(RTCPeerConnection *)peerConnection
+    iceGatheringStateChanged:(RTCIceGatheringState)newState;

[tkchin_webrtc, 2016/02/05 16:15:15]

didChangeIceGatheringState

[hjon_webrtc, 2016/02/09 00:59:54]

Done.

+
+/** New ice candidate has been found. */
+- (void)peerConnection:(RTCPeerConnection *)peerConnection
+    receivedIceCandidate:(RTCIceCandidate *)candidate;

[tkchin_webrtc, 2016/02/05 16:15:16]

didGenerateIceCandidate

[hjon_webrtc, 2016/02/09 00:59:54]

Done.

+
+/** New data channel has been opened. */
+- (void)peerConnection:(RTCPeerConnection *)peerConnection
+    didOpenDataChannel:(RTCDataChannel *)dataChannel;
+
+@end
+
+
+@interface RTCPeerConnection : NSObject
+
+/**
+ * The object that will be notifed about events such as state changes and
+ * streams being added or removed.
+ */
+@property(nonatomic, weak) id<RTCPeerConnectionDelegate> delegate;
+
+/** The pending or current remote description. */
+@property(nonatomic, readonly) NSArray *localStreams;
+
+/** The pending or current local description. */

[tkchin_webrtc, 2016/02/05 16:15:16]

? Not pending I think.

[hjon_webrtc, 2016/02/09 00:59:54]

The spec mentions pending, but I'm not seeing an obvious indication that this is
the case in the underlying C++, so I removed it.

+@property(nonatomic, readonly, nullable)
+    RTCSessionDescription *localDescription;
+
+/** The pending or current remote description. */
+@property(nonatomic, readonly, nullable)
+    RTCSessionDescription *remoteDescription;
+
+/** The signaling state of this RTCPeerConnection instance. */
+@property(nonatomic, readonly) RTCSignalingState signalingState;
+
+/** The ICE connection state of this RTCPeerConnection instance. */
+@property(nonatomic, readonly) RTCIceConnectionState iceConnectionState;
+
+/** The ICE gathering state of this RTCPeerConnection instance. */
+@property(nonatomic, readonly) RTCIceGatheringState iceGatheringState;
+
+- (instancetype)init NS_UNAVAILABLE;
+
+/**
+ * Initialize an RTCPeerConnection with a configuration, constraints, and
+ * delegate.
+ */
+- (instancetype)initWithFactory:(RTCPeerConnectionFactory *)factory
+                  configuration:(RTCConfiguration *)configuration
+                    constraints:(RTCMediaConstraints *)constraints
+                       delegate:(id<RTCPeerConnectionDelegate>)delegate
+    NS_DESIGNATED_INITIALIZER;
+
+/** Terminate all media and close the transport. */
+- (void)close;
+
+/** Provide a remote candidate to the ICE Agent. */
+- (void)addIceCandidate:(RTCIceCandidate *)candidate;
+
+/** Add a new media stream to be sent on this peer connection. */
+- (void)addStream:(RTCMediaStream *)stream;
+
+/** Remove the given media stream from this peer connection. */
+- (void)removeStream:(RTCMediaStream *)stream;
+
+/** Create a new data channel with the given label and configuration. */
+- (RTCDataChannel *)dataChannelWithLabel:(NSString *)label

[tkchin_webrtc, 2016/02/05 16:15:15]

If possible, move this to a category below. Correspond it with the different
specs.

@interface RTCPeerConnection (DataChannel)
@end

@interface RTCPeerConnection (Stats)
@end

And then place the implementation methods in their own file
RTCPeerConnection+DataChannel.mm
RTCPeerConnection+Stats.mm

[hjon_webrtc, 2016/02/09 00:59:53]

Done.

+    configuration:(RTCDataChannelConfiguration *)configuration;
+
+/** Generate an SDP offer. */
+- (void)offerWithConstraints:(RTCMediaConstraints *)constraints

[tkchin_webrtc, 2016/02/05 16:15:16]

nit: offerForConstraints / answerForConstraints

[hjon_webrtc, 2016/02/09 00:59:54]

Done.

+           completionHandler:(void (^)
+  (RTCSessionDescription *sessionDescription, NSError *error))completionHandler;
+
+/** Generate an SDP answer. */
+- (void)answerWithConstraints:(RTCMediaConstraints *)constraints
+            completionHandler:(void (^)
+  (RTCSessionDescription *sessionDescription, NSError *error))completionHandler;
+
+/** Apply the supplied RTCSessionDescription as the local description. */
+- (void)setLocalDescription:(RTCSessionDescription *)sdp
+          completionHandler:(void (^)(NSError *error))completionHandler;
+
+/** Apply the supplied RTCSessionDescription as the remote description. */
+- (void)setRemoteDescription:(RTCSessionDescription *)sdp
+           completionHandler:(void (^)(NSError *error))completionHandler;
+
+/**
+ * Gather stats for the given RTCMediaStreamTrack. If |mediaStreamTrack| is nil
+ * statistics are gathered for all tracks.
+ */
+- (void)statsForMediaStreamTrack:
+    (nullable RTCMediaStreamTrack *)mediaStreamTrack
+                statsOutputLevel:(RTCStatsOutputLevel)statsOutputLevel
+               completionHandler:
+    (void (^)(NSArray<RTCStatsReport *> *stats))completionHandler;
+
+@end
+
+NS_ASSUME_NONNULL_END