Support building WebRTC without audio and video for IOS

webrtc/sdk/objc/Framework/Headers/WebRTC/RTCPeerConnectionFactory.h

 /*
  *  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.
  */
 
@@ skipping 10 matching lines @@
 @class RTCMediaConstraints;
 @class RTCMediaStream;
 @class RTCPeerConnection;
 @class RTCVideoSource;
 @class RTCVideoTrack;
 @protocol RTCPeerConnectionDelegate;
 
 RTC_EXPORT
 @interface RTCPeerConnectionFactory : NSObject
 
-- (instancetype)init NS_DESIGNATED_INITIALIZER;
-
 /** Initialize an RTCAudioSource with constraints. */
 - (RTCAudioSource *)audioSourceWithConstraints:(nullable RTCMediaConstraints *)constraints;
 
 /** Initialize an RTCAudioTrack with an id. Convenience ctor to use an audio source with no
  *  constraints.
  */
 - (RTCAudioTrack *)audioTrackWithTrackId:(NSString *)trackId;
 
 /** Initialize an RTCAudioTrack with a source and an id. */
 - (RTCAudioTrack *)audioTrackWithSource:(RTCAudioSource *)source
                                 trackId:(NSString *)trackId;
 
+/** Initialize an RTCPeerConnection with a configuration, constraints, and
+ *  delegate.
+ */
+- (RTCPeerConnection *)peerConnectionWithConfiguration:(RTCConfiguration *)configuration
+                                           constraints:(RTCMediaConstraints *)constraints
+                                              delegate:
+                                                  (nullable id<RTCPeerConnectionDelegate>)delegate;
+
+/** Start an AecDump recording. This API call will likely change in the future. */
+- (BOOL)startAecDumpWithFilePath:(NSString *)filePath maxSizeInBytes:(int64_t)maxSizeInBytes;
+
+/* Stop an active AecDump recording */
+- (void)stopAecDump;
+
+@end
+
+@interface RTCPeerConnectionFactory (Media)
+
+- (instancetype)init;

[tkchin_webrtc, 2017/06/20 21:51:24]

do not place designated ctors in category

+
+/** Initialize an RTCMediaStream with an id. */
+- (RTCMediaStream *)mediaStreamWithStreamId:(NSString *)streamId;
+
+@end
+
+@interface RTCPeerConnectionFactory (Video)
+
 /** Initialize an RTCAVFoundationVideoSource with constraints. */
 - (RTCAVFoundationVideoSource *)avFoundationVideoSourceWithConstraints:
-    (nullable RTCMediaConstraints *)constraints;
+        (nullable RTCMediaConstraints *)constraints;
 
 /** Initialize a generic RTCVideoSource. The RTCVideoSource should be passed to a RTCVideoCapturer
  *  implementation, e.g. RTCCameraVideoCapturer, in order to produce frames.
  */
 - (RTCVideoSource *)videoSource;
 
 /** Initialize an RTCVideoTrack with a source and an id. */
 - (RTCVideoTrack *)videoTrackWithSource:(RTCVideoSource *)source
                                 trackId:(NSString *)trackId;
 
-/** Initialize an RTCMediaStream with an id. */
-- (RTCMediaStream *)mediaStreamWithStreamId:(NSString *)streamId;
-
-/** Initialize an RTCPeerConnection with a configuration, constraints, and
- *  delegate.
- */
-- (RTCPeerConnection *)peerConnectionWithConfiguration:
-    (RTCConfiguration *)configuration
-                                           constraints:
-    (RTCMediaConstraints *)constraints
-                                              delegate:
-    (nullable id<RTCPeerConnectionDelegate>)delegate;
-
-/** Start an AecDump recording. This API call will likely change in the future. */
-- (BOOL)startAecDumpWithFilePath:(NSString *)filePath
-                  maxSizeInBytes:(int64_t)maxSizeInBytes;
-
-/* Stop an active AecDump recording */
-- (void)stopAecDump;
-
 @end
 
 NS_ASSUME_NONNULL_END