Add new view that renders local video using AVCaptureLayerPreview.

BUG=

Review URL: https://codereview.webrtc.org/1497393002

Cr-Commit-Position: refs/heads/master@{#10940}

webrtc/examples/objc/AppRTCDemo/ios/ARDMainView.m

@@ -21,15 +21,8 @@ static CGFloat const kRoomTextFieldMargin = 8;
 static CGFloat const kCallControlMargin = 8;
 static CGFloat const kAppLabelHeight = 20;
 
-@class ARDRoomTextField;
-@protocol ARDRoomTextFieldDelegate <NSObject>
-- (void)roomTextField:(ARDRoomTextField *)roomTextField
-         didInputRoom:(NSString *)room;
-@end
-
 // Helper view that contains a text field and a clear button.
 @interface ARDRoomTextField : UIView <UITextFieldDelegate>
-@property(nonatomic, weak) id<ARDRoomTextFieldDelegate> delegate;
 @property(nonatomic, readonly) NSString *roomText;
 @end
 
@@ -38,14 +31,14 @@ static CGFloat const kAppLabelHeight = 20;
   UIButton *_clearButton;
 }
 
-@synthesize delegate = _delegate;
-
 - (instancetype)initWithFrame:(CGRect)frame {
   if (self = [super initWithFrame:frame]) {
     _roomText = [[UITextField alloc] initWithFrame:CGRectZero];
     _roomText.borderStyle = UITextBorderStyleNone;
     _roomText.font = [UIFont fontWithName:@"Roboto" size:12];
     _roomText.placeholder = @"Room name";
+    _roomText.autocorrectionType = UITextAutocorrectionTypeNo;
+    _roomText.autocapitalizationType = UITextAutocapitalizationTypeNone;
     _roomText.delegate = self;
     [_roomText addTarget:self
                   action:@selector(textFieldDidChange:)
@@ -96,10 +89,6 @@ static CGFloat const kAppLabelHeight = 20;
 
 #pragma mark - UITextFieldDelegate
 
-- (void)textFieldDidEndEditing:(UITextField *)textField {
-  [_delegate roomTextField:self didInputRoom:textField.text];
-}
-
 - (BOOL)textFieldShouldReturn:(UITextField *)textField {
   // There is no other control that can take focus, so manually resign focus
   // when return (Join) is pressed to trigger |textFieldDidEndEditing|.
@@ -125,9 +114,6 @@ static CGFloat const kAppLabelHeight = 20;
 
 @end
 
-@interface ARDMainView () <ARDRoomTextFieldDelegate>
-@end
-
 @implementation ARDMainView {
   UILabel *_appLabel;
   ARDRoomTextField *_roomText;
@@ -151,7 +137,6 @@ static CGFloat const kAppLabelHeight = 20;
     [self addSubview:_appLabel];
 
     _roomText = [[ARDRoomTextField alloc] initWithFrame:CGRectZero];
-    _roomText.delegate = self;
     [self addSubview:_roomText];
 
     UIFont *controlFont = [UIFont fontWithName:@"Roboto" size:20];
@@ -260,16 +245,6 @@ static CGFloat const kAppLabelHeight = 20;
                                       _startCallButton.frame.size.height);
 }
 
-#pragma mark - ARDRoomTextFieldDelegate
-
-- (void)roomTextField:(ARDRoomTextField *)roomTextField
-         didInputRoom:(NSString *)room {
-  [_delegate mainView:self
-         didInputRoom:room
-           isLoopback:NO
-          isAudioOnly:_audioOnlySwitch.isOn];
-}
-
 #pragma mark - Private
 
 - (void)onStartCall:(id)sender {

webrtc/examples/objc/AppRTCDemo/ios/ARDVideoCallView.h

@@ -10,6 +10,7 @@
 
 #import <UIKit/UIKit.h>
 
+#import "webrtc/base/objc/RTCCameraPreviewView.h"
 #import "RTCEAGLVideoView.h"
 
 #import "ARDStatsView.h"
@@ -33,7 +34,7 @@
 @interface ARDVideoCallView : UIView
 
 @property(nonatomic, readonly) UILabel *statusLabel;
-@property(nonatomic, readonly) RTCEAGLVideoView *localVideoView;
+@property(nonatomic, readonly) RTCCameraPreviewView *localVideoView;
 @property(nonatomic, readonly) RTCEAGLVideoView *remoteVideoView;
 @property(nonatomic, readonly) ARDStatsView *statsView;
 @property(nonatomic, weak) id<ARDVideoCallViewDelegate> delegate;

webrtc/examples/objc/AppRTCDemo/ios/ARDVideoCallView.m

@@ -25,7 +25,6 @@ static CGFloat const kStatusBarHeight = 20;
 @implementation ARDVideoCallView {
   UIButton *_cameraSwitchButton;
   UIButton *_hangupButton;
-  CGSize _localVideoSize;
   CGSize _remoteVideoSize;
   BOOL _useRearCamera;
 }
@@ -42,10 +41,7 @@ static CGFloat const kStatusBarHeight = 20;
     _remoteVideoView.delegate = self;
     [self addSubview:_remoteVideoView];
 
-    // TODO(tkchin): replace this with a view that renders layer from
-    // AVCaptureSession.
-    _localVideoView = [[RTCEAGLVideoView alloc] initWithFrame:CGRectZero];
-    _localVideoView.delegate = self;
+    _localVideoView = [[RTCCameraPreviewView alloc] initWithFrame:CGRectZero];
     [self addSubview:_localVideoView];
 
     _statsView = [[ARDStatsView alloc] initWithFrame:CGRectZero];
@@ -114,22 +110,15 @@ static CGFloat const kStatusBarHeight = 20;
     _remoteVideoView.frame = bounds;
   }
 
-  if (_localVideoSize.width && _localVideoSize.height > 0) {
-    // Aspect fit local video view into a square box.
-    CGRect localVideoFrame =
-        CGRectMake(0, 0, kLocalVideoViewSize, kLocalVideoViewSize);
-    localVideoFrame =
-        AVMakeRectWithAspectRatioInsideRect(_localVideoSize, localVideoFrame);
-
-    // Place the view in the bottom right.
-    localVideoFrame.origin.x = CGRectGetMaxX(bounds)
-        - localVideoFrame.size.width - kLocalVideoViewPadding;
-    localVideoFrame.origin.y = CGRectGetMaxY(bounds)
-        - localVideoFrame.size.height - kLocalVideoViewPadding;
-    _localVideoView.frame = localVideoFrame;
-  } else {
-    _localVideoView.frame = bounds;
-  }
+  // Aspect fit local video view into a square box.
+  CGRect localVideoFrame =
+      CGRectMake(0, 0, kLocalVideoViewSize, kLocalVideoViewSize);
+  // Place the view in the bottom right.
+  localVideoFrame.origin.x = CGRectGetMaxX(bounds)
+      - localVideoFrame.size.width - kLocalVideoViewPadding;
+  localVideoFrame.origin.y = CGRectGetMaxY(bounds)
+      - localVideoFrame.size.height - kLocalVideoViewPadding;
+  _localVideoView.frame = localVideoFrame;
 
   // Place stats at the top.
   CGSize statsSize = [_statsView sizeThatFits:bounds.size];
@@ -159,10 +148,7 @@ static CGFloat const kStatusBarHeight = 20;
 #pragma mark - RTCEAGLVideoViewDelegate
 
 - (void)videoView:(RTCEAGLVideoView*)videoView didChangeVideoSize:(CGSize)size {
-  if (videoView == _localVideoView) {
-    _localVideoSize = size;
-    _localVideoView.hidden = CGSizeEqualToSize(CGSizeZero, _localVideoSize);
-  } else if (videoView == _remoteVideoView) {
+ if (videoView == _remoteVideoView) {
     _remoteVideoSize = size;
   }
   [self setNeedsLayout];

webrtc/examples/objc/AppRTCDemo/ios/ARDVideoCallViewController.m

@@ -128,18 +128,21 @@
   if (_localVideoTrack == localVideoTrack) {
     return;
   }
-  [_localVideoTrack removeRenderer:_videoCallView.localVideoView];
   _localVideoTrack = nil;
-  [_videoCallView.localVideoView renderFrame:nil];
   _localVideoTrack = localVideoTrack;
-  [_localVideoTrack addRenderer:_videoCallView.localVideoView];
+  RTCAVFoundationVideoSource *source = nil;
+  if ([localVideoTrack.source
+          isKindOfClass:[RTCAVFoundationVideoSource class]]) {
+    source = (RTCAVFoundationVideoSource*)localVideoTrack.source;
+  }
+  _videoCallView.localVideoView.captureSession = source.captureSession;
 }
 
 - (void)setRemoteVideoTrack:(RTCVideoTrack *)remoteVideoTrack {
   if (_remoteVideoTrack == remoteVideoTrack) {
     return;
   }
-  [_remoteVideoTrack removeRenderer:_videoCallView.localVideoView];
+  [_remoteVideoTrack removeRenderer:_videoCallView.remoteVideoView];
   _remoteVideoTrack = nil;
   [_videoCallView.remoteVideoView renderFrame:nil];
   _remoteVideoTrack = remoteVideoTrack;