ObjC: Add support for injectable native audio and video codecs

webrtc/sdk/objc/Framework/Classes/PeerConnection/RTCPeerConnectionFactory.mm

 /*
  *  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+Native.h"
 #import "RTCPeerConnectionFactory+Private.h"
 
 #import "NSString+StdString.h"
 #import "RTCAVFoundationVideoSource+Private.h"
 #import "RTCAudioSource+Private.h"
 #import "RTCAudioTrack+Private.h"
 #import "RTCMediaConstraints+Private.h"
 #import "RTCMediaStream+Private.h"
 #import "RTCPeerConnection+Private.h"
 #import "RTCVideoSource+Private.h"
 #import "RTCVideoTrack+Private.h"
 #import "WebRTC/RTCLogging.h"
 #import "WebRTC/RTCVideoCodecFactory.h"
 #ifndef HAVE_NO_MEDIA
+#include "VideoToolbox/objc_video_decoder_factory.h"
+#include "VideoToolbox/objc_video_encoder_factory.h"
 #import "WebRTC/RTCVideoCodecH264.h"
+// The no-media version PeerConnectionFactory doesn't depend on these files, but the gn check tool
+// is not smart enough to take the #ifdef into account.
+#include "webrtc/api/audio_codecs/builtin_audio_decoder_factory.h"  // nogncheck
+#include "webrtc/api/audio_codecs/builtin_audio_encoder_factory.h"  // nogncheck
 #endif
 
 #include "Video/objcvideotracksource.h"
-#include "VideoToolbox/objc_video_decoder_factory.h"
-#include "VideoToolbox/objc_video_encoder_factory.h"
 #include "webrtc/api/videosourceproxy.h"
 // Adding the nogncheck to disable the including header check.
 // The no-media version PeerConnectionFactory doesn't depend on media related
 // C++ target.
 // TODO(zhihuang): Remove nogncheck once MediaEngineInterface is moved to C++
 // API layer.
 #include "webrtc/media/engine/webrtcmediaengine.h"  // nogncheck
 
 @implementation RTCPeerConnectionFactory {
   std::unique_ptr<rtc::Thread> _networkThread;
   std::unique_ptr<rtc::Thread> _workerThread;
   std::unique_ptr<rtc::Thread> _signalingThread;
   BOOL _hasStartedAecDump;
 }
 
 @synthesize nativeFactory = _nativeFactory;
 
 - (instancetype)init {
 #ifdef HAVE_NO_MEDIA
-  return [self initWithEncoderFactory:nil decoderFactory:nil];
+  return [self initWithNativeAudioEncoderFactory:nil
+                       nativeAudioDecoderFactory:nil
+                       nativeVideoEncoderFactory:nil
+                       nativeVideoDecoderFactory:nil];
 #else
-  return [self initWithEncoderFactory:[[RTCVideoEncoderFactoryH264 alloc] init]
-                       decoderFactory:[[RTCVideoDecoderFactoryH264 alloc] init]];
+  return [self initWithNativeAudioEncoderFactory:webrtc::CreateBuiltinAudioEncoderFactory()
+                       nativeAudioDecoderFactory:webrtc::CreateBuiltinAudioDecoderFactory()
+                       nativeVideoEncoderFactory:new webrtc::ObjCVideoEncoderFactory(
+                                                     [[RTCVideoEncoderFactoryH264 alloc] init])
+                       nativeVideoDecoderFactory:new webrtc::ObjCVideoDecoderFactory(
+                                                     [[RTCVideoDecoderFactoryH264 alloc] init])];
 #endif
 }
 
 - (instancetype)initWithEncoderFactory:(nullable id<RTCVideoEncoderFactory>)encoderFactory
                         decoderFactory:(nullable id<RTCVideoDecoderFactory>)decoderFactory {
+#ifdef HAVE_NO_MEDIA
+  return [self initWithNativeAudioEncoderFactory:nil
+                       nativeAudioDecoderFactory:nil
+                       nativeVideoEncoderFactory:nil
+                       nativeVideoDecoderFactory:nil];
+#else
+  cricket::WebRtcVideoEncoderFactory *native_encoder_factory =
+      encoderFactory ? new webrtc::ObjCVideoEncoderFactory(encoderFactory) : nullptr;
+  cricket::WebRtcVideoDecoderFactory *native_decoder_factory =
+      decoderFactory ? new webrtc::ObjCVideoDecoderFactory(decoderFactory) : nullptr;
+  return [self initWithNativeAudioEncoderFactory:webrtc::CreateBuiltinAudioEncoderFactory()
+                       nativeAudioDecoderFactory:webrtc::CreateBuiltinAudioDecoderFactory()
+                       nativeVideoEncoderFactory:native_encoder_factory
+                       nativeVideoDecoderFactory:native_decoder_factory];
+#endif
+}
+
+- (instancetype)initWithNativeAudioEncoderFactory:
+                    (rtc::scoped_refptr<webrtc::AudioEncoderFactory>)audioEncoderFactory
+                        nativeAudioDecoderFactory:
+                            (rtc::scoped_refptr<webrtc::AudioDecoderFactory>)audioDecoderFactory
+                        nativeVideoEncoderFactory:
+                            (nullable cricket::WebRtcVideoEncoderFactory *)videoEncoderFactory
+                        nativeVideoDecoderFactory:
+                            (nullable cricket::WebRtcVideoDecoderFactory *)videoDecoderFactory {
   if (self = [super init]) {
     _networkThread = rtc::Thread::CreateWithSocketServer();
     BOOL result = _networkThread->Start();
     NSAssert(result, @"Failed to start network thread.");
 
     _workerThread = rtc::Thread::Create();
     result = _workerThread->Start();
     NSAssert(result, @"Failed to start worker thread.");
 
     _signalingThread = rtc::Thread::Create();
     result = _signalingThread->Start();
     NSAssert(result, @"Failed to start signaling thread.");
 #ifdef HAVE_NO_MEDIA
     _nativeFactory = webrtc::CreateModularPeerConnectionFactory(
         _networkThread.get(),
         _workerThread.get(),
         _signalingThread.get(),
         nullptr,  // default_adm
         nullptr,  // audio_encoder_factory
         nullptr,  // audio_decoder_factory
         nullptr,  // video_encoder_factory
         nullptr,  // video_decoder_factory
         nullptr,  // audio_mixer
         std::unique_ptr<cricket::MediaEngineInterface>(),
         std::unique_ptr<webrtc::CallFactoryInterface>(),
         std::unique_ptr<webrtc::RtcEventLogFactoryInterface>());
 #else
-    cricket::WebRtcVideoEncoderFactory *platform_encoder_factory = nullptr;
-    cricket::WebRtcVideoDecoderFactory *platform_decoder_factory = nullptr;
-    if (encoderFactory) {
-      platform_encoder_factory = new webrtc::ObjCVideoEncoderFactory(encoderFactory);
-    }
-    if (decoderFactory) {
-      platform_decoder_factory = new webrtc::ObjCVideoDecoderFactory(decoderFactory);
-    }
-
     // Ownership of encoder/decoder factories is passed on to the
     // peerconnectionfactory, that handles deleting them.
     _nativeFactory = webrtc::CreatePeerConnectionFactory(_networkThread.get(),
                                                          _workerThread.get(),
                                                          _signalingThread.get(),
-                                                         nullptr,
-                                                         platform_encoder_factory,
-                                                         platform_decoder_factory);
+                                                         nullptr,  // audio device module
+                                                         audioEncoderFactory,
+                                                         audioDecoderFactory,
+                                                         videoEncoderFactory,
+                                                         videoDecoderFactory);
 #endif
     NSAssert(_nativeFactory, @"Failed to initialize PeerConnectionFactory!");
   }
   return self;
 }
 
 - (RTCAudioSource *)audioSourceWithConstraints:(nullable RTCMediaConstraints *)constraints {
   std::unique_ptr<webrtc::MediaConstraints> nativeConstraints;
   if (constraints) {
     nativeConstraints = constraints.nativeConstraints;
@@ skipping 74 matching lines @@
   _hasStartedAecDump = _nativeFactory->StartAecDump(fd, maxSizeInBytes);
   return _hasStartedAecDump;
 }
 
 - (void)stopAecDump {
   _nativeFactory->StopAecDump();
   _hasStartedAecDump = NO;
 }
 
 @end