Split iOS sdk in to separate targets

This CL splits the iOS sdk into separate static libraries for video,
audio, ui, common, and peerconnection-related code. This will in the
future make it easier to compile WebRTC without unneeded components.

BUG=webrtc:4867

Review-Url: https://codereview.webrtc.org/2862543002
Cr-Commit-Position: refs/heads/master@{#18166}

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

@@ -1,144 +0,0 @@
-/*
- *  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+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"
-
-#include "objcvideotracksource.h"
-#include "videotoolboxvideocodecfactory.h"
-
-@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 {
-  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.");
-
-    const auto encoder_factory = new webrtc::VideoToolboxVideoEncoderFactory();
-    const auto decoder_factory = new webrtc::VideoToolboxVideoDecoderFactory();
-
-    // 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, encoder_factory, decoder_factory);
-    NSAssert(_nativeFactory, @"Failed to initialize PeerConnectionFactory!");
-  }
-  return self;
-}
-
-- (RTCAudioSource *)audioSourceWithConstraints:(nullable RTCMediaConstraints *)constraints {
-  std::unique_ptr<webrtc::MediaConstraints> nativeConstraints;
-  if (constraints) {
-    nativeConstraints = constraints.nativeConstraints;
-  }
-  rtc::scoped_refptr<webrtc::AudioSourceInterface> source =
-      _nativeFactory->CreateAudioSource(nativeConstraints.get());
-  return [[RTCAudioSource alloc] initWithNativeAudioSource:source];
-}
-
-- (RTCAudioTrack *)audioTrackWithTrackId:(NSString *)trackId {
-  RTCAudioSource *audioSource = [self audioSourceWithConstraints:nil];
-  return [self audioTrackWithSource:audioSource trackId:trackId];
-}
-
-- (RTCAudioTrack *)audioTrackWithSource:(RTCAudioSource *)source
-                                trackId:(NSString *)trackId {
-  return [[RTCAudioTrack alloc] initWithFactory:self
-                                         source:source
-                                        trackId:trackId];
-}
-
-- (RTCAVFoundationVideoSource *)avFoundationVideoSourceWithConstraints:
-    (nullable RTCMediaConstraints *)constraints {
-  return [[RTCAVFoundationVideoSource alloc] initWithFactory:self
-                                                 constraints:constraints];
-}
-
-- (RTCVideoSource *)videoSource {
-  rtc::scoped_refptr<webrtc::ObjcVideoTrackSource> objcVideoTrackSource(
-      new rtc::RefCountedObject<webrtc::ObjcVideoTrackSource>());
-  return [[RTCVideoSource alloc] initWithNativeVideoSource:objcVideoTrackSource];
-}
-
-- (RTCVideoTrack *)videoTrackWithSource:(RTCVideoSource *)source
-                                trackId:(NSString *)trackId {
-  return [[RTCVideoTrack alloc] initWithFactory:self
-                                         source:source
-                                        trackId:trackId];
-}
-
-- (RTCMediaStream *)mediaStreamWithStreamId:(NSString *)streamId {
-  return [[RTCMediaStream alloc] initWithFactory:self
-                                        streamId:streamId];
-}
-
-- (RTCPeerConnection *)peerConnectionWithConfiguration:
-    (RTCConfiguration *)configuration
-                                           constraints:
-    (RTCMediaConstraints *)constraints
-                                              delegate:
-    (nullable id<RTCPeerConnectionDelegate>)delegate {
-  return [[RTCPeerConnection alloc] initWithFactory:self
-                                      configuration:configuration
-                                        constraints:constraints
-                                           delegate:delegate];
-}
-
-- (BOOL)startAecDumpWithFilePath:(NSString *)filePath
-                  maxSizeInBytes:(int64_t)maxSizeInBytes {
-  RTC_DCHECK(filePath.length);
-  RTC_DCHECK_GT(maxSizeInBytes, 0);
-
-  if (_hasStartedAecDump) {
-    RTCLogError(@"Aec dump already started.");
-    return NO;
-  }
-  int fd = open(filePath.UTF8String, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR);
-  if (fd < 0) {
-    RTCLogError(@"Error opening file: %@. Error: %d", filePath, errno);
-    return NO;
-  }
-  _hasStartedAecDump = _nativeFactory->StartAecDump(fd, maxSizeInBytes);
-  return _hasStartedAecDump;
-}
-
-- (void)stopAecDump {
-  _nativeFactory->StopAecDump();
-  _hasStartedAecDump = NO;
-}
-
-@end