src/third_party/libjingle/source/talk/examples/objc/AppRTCDemo/ios/APPRTCViewController.m

   1 /*
   2  * libjingle
   3  * Copyright 2013, Google Inc.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are met:
   7  *
   8  *  1. Redistributions of source code must retain the above copyright notice,
   9  *     this list of conditions and the following disclaimer.
  10  *  2. Redistributions in binary form must reproduce the above copyright notice,
  11  *     this list of conditions and the following disclaimer in the documentation
  12  *     and/or other materials provided with the distribution.
  13  *  3. The name of the author may not be used to endorse or promote products
  14  *     derived from this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
  17  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
  19  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  20  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  22  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  23  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  24  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  25  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  */
  27
  28 #if !defined(__has_feature) || !__has_feature(objc_arc)
  29 #error "This file requires ARC support."
  30 #endif
  31
  32 #import "APPRTCViewController.h"
  33
  34 #import <AVFoundation/AVFoundation.h>
  35 #import "APPRTCConnectionManager.h"
  36 #import "RTCEAGLVideoView.h"
  37
  38 // Padding space for local video view with its parent.
  39 static CGFloat const kLocalViewPadding = 20;
  40
  41 @interface APPRTCViewController ()
  42 <APPRTCConnectionManagerDelegate, APPRTCLogger, RTCEAGLVideoViewDelegate>
  43 @property(nonatomic, assign) UIInterfaceOrientation statusBarOrientation;
  44 @property(nonatomic, strong) RTCEAGLVideoView* localVideoView;
  45 @property(nonatomic, strong) RTCEAGLVideoView* remoteVideoView;
  46 @end
  47
  48 @implementation APPRTCViewController {
  49   APPRTCConnectionManager* _connectionManager;
  50   CGSize _localVideoSize;
  51   CGSize _remoteVideoSize;
  52 }
  53
  54 - (instancetype)initWithNibName:(NSString*)nibName
  55                          bundle:(NSBundle*)bundle {
  56   if (self = [super initWithNibName:nibName bundle:bundle]) {
  57     _connectionManager =
  58         [[APPRTCConnectionManager alloc] initWithDelegate:self
  59                                                    logger:self];
  60   }
  61   return self;
  62 }
  63
  64 - (void)viewDidLoad {
  65   [super viewDidLoad];
  66
  67   self.remoteVideoView =
  68       [[RTCEAGLVideoView alloc] initWithFrame:self.blackView.bounds];
  69   self.remoteVideoView.delegate = self;
  70   self.remoteVideoView.transform = CGAffineTransformMakeScale(-1, 1);
  71   [self.blackView addSubview:self.remoteVideoView];
  72
  73   self.localVideoView =
  74       [[RTCEAGLVideoView alloc] initWithFrame:self.blackView.bounds];
  75   self.localVideoView.delegate = self;
  76   [self.blackView addSubview:self.localVideoView];
  77
  78   self.statusBarOrientation =
  79       [UIApplication sharedApplication].statusBarOrientation;
  80   self.roomInput.delegate = self;
  81   [self.roomInput becomeFirstResponder];
  82 }
  83
  84 - (void)viewDidLayoutSubviews {
  85   if (self.statusBarOrientation !=
  86       [UIApplication sharedApplication].statusBarOrientation) {
  87     self.statusBarOrientation =
  88         [UIApplication sharedApplication].statusBarOrientation;
  89     [[NSNotificationCenter defaultCenter]
  90         postNotificationName:@"StatusBarOrientationDidChange"
  91                       object:nil];
  92   }
  93 }
  94
  95 - (void)applicationWillResignActive:(UIApplication*)application {
  96   [self logMessage:@"Application lost focus, connection broken."];
  97   [self disconnect];
  98 }
  99
 100 #pragma mark - APPRTCConnectionManagerDelegate
 101
 102 - (void)connectionManager:(APPRTCConnectionManager*)manager
 103     didReceiveLocalVideoTrack:(RTCVideoTrack*)localVideoTrack {
 104   self.localVideoView.hidden = NO;
 105   self.localVideoView.videoTrack = localVideoTrack;
 106 }
 107
 108 - (void)connectionManager:(APPRTCConnectionManager*)manager
 109     didReceiveRemoteVideoTrack:(RTCVideoTrack*)remoteVideoTrack {
 110   self.remoteVideoView.videoTrack = remoteVideoTrack;
 111 }
 112
 113 - (void)connectionManagerDidReceiveHangup:(APPRTCConnectionManager*)manager {
 114   [self showAlertWithMessage:@"Remote hung up."];
 115   [self disconnect];
 116 }
 117
 118 - (void)connectionManager:(APPRTCConnectionManager*)manager
 119       didErrorWithMessage:(NSString*)message {
 120   [self showAlertWithMessage:message];
 121   [self disconnect];
 122 }
 123
 124 #pragma mark - APPRTCLogger
 125
 126 - (void)logMessage:(NSString*)message {
 127   dispatch_async(dispatch_get_main_queue(), ^{
 128     NSString* output =
 129         [NSString stringWithFormat:@"%@\n%@", self.logView.text, message];
 130     self.logView.text = output;
 131     [self.logView
 132         scrollRangeToVisible:NSMakeRange([self.logView.text length], 0)];
 133   });
 134 }
 135
 136 #pragma mark - RTCEAGLVideoViewDelegate
 137
 138 - (void)videoView:(RTCEAGLVideoView*)videoView
 139     didChangeVideoSize:(CGSize)size {
 140   if (videoView == self.localVideoView) {
 141     _localVideoSize = size;
 142   } else if (videoView == self.remoteVideoView) {
 143     _remoteVideoSize = size;
 144   } else {
 145     NSParameterAssert(NO);
 146   }
 147   [self updateVideoViewLayout];
 148 }
 149
 150 #pragma mark - UITextFieldDelegate
 151
 152 - (void)textFieldDidEndEditing:(UITextField*)textField {
 153   NSString* room = textField.text;
 154   if ([room length] == 0) {
 155     return;
 156   }
 157   textField.hidden = YES;
 158   self.instructionsView.hidden = YES;
 159   self.logView.hidden = NO;
 160   NSString* url =
 161       [NSString stringWithFormat:@"https://apprtc.appspot.com/?r=%@", room];
 162   [_connectionManager connectToRoomWithURL:[NSURL URLWithString:url]];
 163   [self setupCaptureSession];
 164 }
 165
 166 - (BOOL)textFieldShouldReturn:(UITextField*)textField {
 167   // There is no other control that can take focus, so manually resign focus
 168   // when return (Join) is pressed to trigger |textFieldDidEndEditing|.
 169   [textField resignFirstResponder];
 170   return YES;
 171 }
 172
 173 #pragma mark - Private
 174
 175 - (void)disconnect {
 176   [self resetUI];
 177   [_connectionManager disconnect];
 178 }
 179
 180 - (void)showAlertWithMessage:(NSString*)message {
 181   UIAlertView* alertView = [[UIAlertView alloc] initWithTitle:nil
 182                                                       message:message
 183                                                      delegate:nil
 184                                             cancelButtonTitle:@"OK"
 185                                             otherButtonTitles:nil];
 186   [alertView show];
 187 }
 188
 189 - (void)resetUI {
 190   [self.roomInput resignFirstResponder];
 191   self.roomInput.text = nil;
 192   self.roomInput.hidden = NO;
 193   self.instructionsView.hidden = NO;
 194   self.logView.hidden = YES;
 195   self.logView.text = nil;
 196   self.localVideoView.videoTrack = nil;
 197   self.remoteVideoView.videoTrack = nil;
 198   self.blackView.hidden = YES;
 199 }
 200
 201 - (void)setupCaptureSession {
 202   self.blackView.hidden = NO;
 203   [self updateVideoViewLayout];
 204 }
 205
 206 - (void)updateVideoViewLayout {
 207   // TODO(tkchin): handle rotation.
 208   CGSize defaultAspectRatio = CGSizeMake(4, 3);
 209   CGSize localAspectRatio = CGSizeEqualToSize(_localVideoSize, CGSizeZero) ?
 210       defaultAspectRatio : _localVideoSize;
 211   CGSize remoteAspectRatio = CGSizeEqualToSize(_remoteVideoSize, CGSizeZero) ?
 212       defaultAspectRatio : _remoteVideoSize;
 213
 214   CGRect remoteVideoFrame =
 215       AVMakeRectWithAspectRatioInsideRect(remoteAspectRatio,
 216                                           self.blackView.bounds);
 217   self.remoteVideoView.frame = remoteVideoFrame;
 218
 219   CGRect localVideoFrame =
 220       AVMakeRectWithAspectRatioInsideRect(localAspectRatio,
 221                                           self.blackView.bounds);
 222   localVideoFrame.size.width = localVideoFrame.size.width / 3;
 223   localVideoFrame.size.height = localVideoFrame.size.height / 3;
 224   localVideoFrame.origin.x = CGRectGetMaxX(self.blackView.bounds)
 225       - localVideoFrame.size.width - kLocalViewPadding;
 226   localVideoFrame.origin.y = CGRectGetMaxY(self.blackView.bounds)
 227       - localVideoFrame.size.height - kLocalViewPadding;
 228   self.localVideoView.frame = localVideoFrame;
 229 }
 230
 231 @end