Update API for Objective-C RTCPeerConnectionFactory.

BUG=
R=jiayl@webrtc.org, tkchin@webrtc.org

Review URL: https://codereview.webrtc.org/1558473002 .

Patch from Jon Hjelle <hjon@andyet.net>.

Cr-Commit-Position: refs/heads/master@{#11326}

webrtc/api/BUILD.gn

@@ -35,6 +35,9 @@ if (is_ios) {
       #"objc/RTCMediaStreamTrack+Private.h",
       #"objc/RTCMediaStreamTrack.h",
       #"objc/RTCMediaStreamTrack.mm",
+      #"objc/RTCPeerConnectionFactory+Private.h",
+      #"objc/RTCPeerConnectionFactory.h",
+      #"objc/RTCPeerConnectionFactory.mm",
       #"objc/RTCVideoSource+Private.h",
       #"objc/RTCVideoSource.h",
       #"objc/RTCVideoSource.mm",

webrtc/api/api.gyp

@@ -33,6 +33,9 @@
             'objc/RTCMediaStreamTrack.mm',
             'objc/RTCOpenGLVideoRenderer.h',
             'objc/RTCOpenGLVideoRenderer.mm',
+            'objc/RTCPeerConnectionFactory+Private.h',
+            'objc/RTCPeerConnectionFactory.h',
+            'objc/RTCPeerConnectionFactory.mm',
             'objc/RTCSessionDescription+Private.h',
             'objc/RTCSessionDescription.h',
             'objc/RTCSessionDescription.mm',

webrtc/api/objc/RTCPeerConnectionFactory+Private.h

@@ -0,0 +1,30 @@
+/*
+ *  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 "RTCPeerConnectionFactory.h"
+
+#include "talk/app/webrtc/peerconnectionfactory.h"
+#include "webrtc/base/scoped_ref_ptr.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface RTCPeerConnectionFactory ()
+
+/**
+ * PeerConnectionFactoryInterface created and held by this
+ * RTCPeerConnectionFactory object. This is needed to pass to the underlying
+ * C++ APIs.
+ */
+@property(nonatomic, readonly)
+    rtc::scoped_refptr<webrtc::PeerConnectionFactoryInterface> nativeFactory;
+
+@end
+
+NS_ASSUME_NONNULL_END

webrtc/api/objc/RTCPeerConnectionFactory.h

@@ -0,0 +1,18 @@
+/*
+ *  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>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface RTCPeerConnectionFactory : NSObject
+@end
+
+NS_ASSUME_NONNULL_END

webrtc/api/objc/RTCPeerConnectionFactory.mm

@@ -0,0 +1,38 @@
+/*
+ *  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 "RTCPeerConnectionFactory.h"
+
+#import "webrtc/api/objc/RTCPeerConnectionFactory+Private.h"
+
+@implementation RTCPeerConnectionFactory {
+  rtc::scoped_ptr<rtc::Thread> _signalingThread;
+  rtc::scoped_ptr<rtc::Thread> _workerThread;
+}
+
+@synthesize nativeFactory = _nativeFactory;
+
+- (instancetype)init {
+  if ((self = [super init])) {
+    _signalingThread.reset(new rtc::Thread());
+    BOOL result = _signalingThread->Start();
+    NSAssert(result, @"Failed to start signaling thread.");
+    _workerThread.reset(new rtc::Thread());
+    result = _workerThread->Start();
+    NSAssert(result, @"Failed to start worker thread.");
+
+    _nativeFactory = webrtc::CreatePeerConnectionFactory(
+        _workerThread.get(), _signalingThread.get(), nullptr, nullptr, nullptr);
+    NSAssert(_nativeFactory, @"Failed to initialize PeerConnectionFactory!");
+  }
+  return self;
+}
+
+@end

webrtc/base/BUILD.gn

@@ -635,6 +635,8 @@ if (is_ios) {
       "objc/RTCDispatcher.m",
       "objc/RTCLogging.h",
       "objc/RTCLogging.mm",
+      "objc/RTCSSLAdapter.h",
+      "objc/RTCSSLAdapter.mm",
     ]
   }
 }

webrtc/base/base.gyp

@@ -39,6 +39,8 @@
             'objc/RTCDispatcher.m',
             'objc/RTCLogging.h',
             'objc/RTCLogging.mm',
+            'objc/RTCSSLAdapter.h',
+            'objc/RTCSSLAdapter.mm',
           ],
           'conditions': [
             ['OS=="ios"', {

webrtc/base/objc/RTCSSLAdapter.h

@@ -0,0 +1,18 @@
+/*
+ *  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>
+
+/**
+ * Initialize and clean up the SSL library. Failure is fatal. These call the
+ * corresponding functions in webrtc/base/ssladapter.h.
+ */
+BOOL RTCInitializeSSL();
+BOOL RTCCleanupSSL();

webrtc/base/objc/RTCSSLAdapter.mm

@@ -0,0 +1,26 @@
+/*
+ *  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 "RTCSSLAdapter.h"
+
+#include "webrtc/base/checks.h"
+#include "webrtc/base/ssladapter.h"
+
+BOOL RTCInitializeSSL() {
+  BOOL initialized = rtc::InitializeSSL();
+  RTC_DCHECK(initialized);
+  return initialized;
+}
+
+BOOL RTCCleanupSSL() {
+  BOOL cleanedUp = rtc::CleanupSSL();
+  RTC_DCHECK(cleanedUp);
+  return cleanedUp;
+}