webrtc/talk/examples/ios/AppRTCDemo/APPRTCViewController.m

/*
 * libjingle
 * Copyright 2013, Google Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *  1. Redistributions of source code must retain the above copyright notice,
 *     this list of conditions and the following disclaimer.
 *  2. Redistributions in binary form must reproduce the above copyright notice,
 *     this list of conditions and the following disclaimer in the documentation
 *     and/or other materials provided with the distribution.
 *  3. The name of the author may not be used to endorse or promote products
 *     derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#import "APPRTCViewController.h"

#import "VideoView.h"

@interface APPRTCViewController ()

@property (nonatomic, assign) UIInterfaceOrientation statusBarOrientation;

@end

@implementation APPRTCViewController

@synthesize textField = _textField;
@synthesize textInstructions = _textInstructions;
@synthesize textOutput = _textOutput;
@synthesize blackView = _blackView;

@synthesize remoteVideoView = _remoteVideoView;
@synthesize localVideoView = _localVideoView;

@synthesize statusBarOrientation = _statusBarOrientation;

- (void)viewDidLoad {
  [super viewDidLoad];
  self.statusBarOrientation =
    [UIApplication sharedApplication].statusBarOrientation;
  self.textField.delegate = self;
  [self.textField becomeFirstResponder];
}

- (void)viewDidLayoutSubviews {
    if (self.statusBarOrientation !=
        [UIApplication sharedApplication].statusBarOrientation) {
        self.statusBarOrientation =
            [UIApplication sharedApplication].statusBarOrientation;
        [[NSNotificationCenter defaultCenter]
         postNotificationName:@"StatusBarOrientationDidChange" object:nil];
    }
}

- (void)displayText:(NSString *)text {
  dispatch_async(dispatch_get_main_queue(), ^(void) {
    NSString *output =
        [NSString stringWithFormat:@"%@\n%@", self.textOutput.text, text];
    self.textOutput.text = output;
  });
}

- (void)resetUI {
  [self.textField resignFirstResponder];
  self.textField.text = nil;
  self.textField.hidden = NO;
  self.textInstructions.hidden = NO;
  self.textOutput.hidden = YES;
  self.textOutput.text = nil;
  self.blackView.hidden = YES;

  [_remoteVideoView stop];
  [_remoteVideoView removeFromSuperview];
  self.remoteVideoView = nil;

  [_localVideoView stop];
  [_localVideoView removeFromSuperview];
  self.localVideoView = nil;
}

// TODO(fischman): Use video dimensions from the incoming video stream
// and resize the Video View accordingly w.r.t. aspect ratio.
enum {
    // Remote video view dimensions.
    kRemoteVideoWidth = 640,
    kRemoteVideoHeight = 480,
    // Padding space for local video view with its parent.
    kLocalViewPadding = 20
};

- (void)setupCaptureSession {
    self.blackView.hidden = NO;

    CGRect frame = CGRectMake((self.blackView.bounds.size.width
                               -kRemoteVideoWidth)/2,
                              (self.blackView.bounds.size.height
                               -kRemoteVideoHeight)/2,
                              kRemoteVideoWidth,
                              kRemoteVideoHeight);
    VideoView *videoView = [[VideoView alloc] initWithFrame:frame];
    videoView.isRemote = TRUE;

    [self.blackView addSubview:videoView];
    videoView.autoresizingMask = UIViewAutoresizingFlexibleLeftMargin |
                                    UIViewAutoresizingFlexibleRightMargin |
                                    UIViewAutoresizingFlexibleBottomMargin |
                                    UIViewAutoresizingFlexibleTopMargin;
    videoView.translatesAutoresizingMaskIntoConstraints = YES;
    _remoteVideoView = videoView;

    CGSize screenSize = [[UIScreen mainScreen] bounds].size;
    CGFloat localVideoViewWidth =
        UIInterfaceOrientationIsPortrait(self.statusBarOrientation) ?
                        screenSize.width/4 : screenSize.height/4;
    CGFloat localVideoViewHeight =
        UIInterfaceOrientationIsPortrait(self.statusBarOrientation) ?
                        screenSize.height/4 : screenSize.width/4;
    frame = CGRectMake(self.blackView.bounds.size.width
                       -localVideoViewWidth-kLocalViewPadding,
                       kLocalViewPadding,
                       localVideoViewWidth,
                       localVideoViewHeight);
    videoView = [[VideoView alloc] initWithFrame:frame];
    videoView.isRemote = FALSE;

    [self.blackView addSubview:videoView];
    videoView.autoresizingMask = UIViewAutoresizingFlexibleLeftMargin |
                                    UIViewAutoresizingFlexibleBottomMargin |
                                    UIViewAutoresizingFlexibleHeight |
                                    UIViewAutoresizingFlexibleWidth;
    videoView.translatesAutoresizingMaskIntoConstraints = YES;
    _localVideoView = videoView;
}

#pragma mark - UITextFieldDelegate

- (void)textFieldDidEndEditing:(UITextField *)textField {
  NSString *room = textField.text;
  if ([room length] == 0) {
    return;
  }
  textField.hidden = YES;
  self.textInstructions.hidden = YES;
  self.textOutput.hidden = NO;
  // TODO(hughv): Instead of launching a URL with apprtc scheme, change to
  // prepopulating the textField with a valid URL missing the room.  This allows
  // the user to have the simplicity of just entering the room or the ability to
  // override to a custom appspot instance.  Remove apprtc:// when this is done.
  NSString *url =
      [NSString stringWithFormat:@"apprtc://apprtc.appspot.com/?r=%@", room];
  [[UIApplication sharedApplication] openURL:[NSURL URLWithString:url]];

  dispatch_async(dispatch_get_main_queue(), ^{
      [self setupCaptureSession];
  });
}

- (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|.
  [textField resignFirstResponder];
  return YES;
}

@end