Move RTCVideoSource to webrtc/api/objc.

webrtc/api/objc/RTCMediaSource.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 "RTCMediaSource.h"
-
-#import "webrtc/api/objc/RTCMediaSource+Private.h"
-
-@implementation RTCMediaSource {
-  rtc::scoped_refptr<webrtc::MediaSourceInterface> _nativeMediaSource;
-}
-
-- (RTCSourceState)state {
-  return [[self class] sourceStateForNativeState:_nativeMediaSource->state()];
-}
-
-- (NSString *)description {
-  return [NSString stringWithFormat:@"RTCMediaSource:\n%@",
-                                    [[self class] stringForState:self.state]];
-}
-
-#pragma mark - Private
-
-- (rtc::scoped_refptr<webrtc::MediaSourceInterface>)nativeMediaSource {
-  return _nativeMediaSource;
-}
-
-- (instancetype)initWithNativeMediaSource:
-    (rtc::scoped_refptr<webrtc::MediaSourceInterface>)nativeMediaSource {
-  NSParameterAssert(nativeMediaSource);
-  if (self = [super init]) {
-    _nativeMediaSource = nativeMediaSource;
-  }
-  return self;
-}
-
-+ (webrtc::MediaSourceInterface::SourceState)nativeSourceStateForState:
-    (RTCSourceState)state {
-  switch (state) {
-    case RTCSourceStateInitializing:
-      return webrtc::MediaSourceInterface::kInitializing;
-    case RTCSourceStateLive:
-      return webrtc::MediaSourceInterface::kLive;
-    case RTCSourceStateEnded:
-      return webrtc::MediaSourceInterface::kEnded;
-    case RTCSourceStateMuted:
-      return webrtc::MediaSourceInterface::kMuted;
-  }
-}
-
-+ (RTCSourceState)sourceStateForNativeState:
-    (webrtc::MediaSourceInterface::SourceState)nativeState {
-  switch (nativeState) {
-    case webrtc::MediaSourceInterface::kInitializing:
-      return RTCSourceStateInitializing;
-    case webrtc::MediaSourceInterface::kLive:
-      return RTCSourceStateLive;
-    case webrtc::MediaSourceInterface::kEnded:
-      return RTCSourceStateEnded;
-    case webrtc::MediaSourceInterface::kMuted:
-      return RTCSourceStateMuted;
-  }
-}
-
-+ (NSString *)stringForState:(RTCSourceState)state {
-  switch (state) {
-    case RTCSourceStateInitializing:
-      return @"Initializing";
-    case RTCSourceStateLive:
-      return @"Live";
-    case RTCSourceStateEnded:
-      return @"Ended";
-    case RTCSourceStateMuted:
-      return @"Muted";
-  }
-}
-
-@end