ISDK-2241: Co-Viewing example with custom AudioDevice

CoViewingExample.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>

CoViewingExample/AppDelegate.swift

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+//
+//  AppDelegate.swift
+//  CoViewingExample
+//
+//  Copyright © 2018 Twilio Inc. All rights reserved.
+//
+
+import UIKit
+
+@UIApplicationMain
+class AppDelegate: UIResponder, UIApplicationDelegate {
+
+    var window: UIWindow?
+
+
+    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
+        print("didFinishLaunchingWithOptions:", launchOptions as Any)
+        if let options = launchOptions,
+            let videoUrl = options[UIApplication.LaunchOptionsKey.url] as? URL {
+                let rootVC = window?.rootViewController as! ViewController
+                rootVC.startPresenter(contentUrl: videoUrl)
+        }
+        return true
+    }
+
+    func application(_ app: UIApplication, open url: URL, options: [UIApplication.OpenURLOptionsKey : Any] = [:]) -> Bool {
+        print("app:openURL:", url, " options:", options as Any)
+
+        let rootVC = window?.rootViewController as! ViewController
+        rootVC.startPresenter(contentUrl: url)
+
+        return true
+    }
+
+    func applicationWillResignActive(_ application: UIApplication) {
+        // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
+        // Use this method to pause ongoing tasks, disable timers, and invalidate graphics rendering callbacks. Games should use this method to pause the game.
+    }
+
+    func applicationDidEnterBackground(_ application: UIApplication) {
+        // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
+        // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
+    }
+
+    func applicationWillEnterForeground(_ application: UIApplication) {
+        // Called as part of the transition from the background to the active state; here you can undo many of the changes made on entering the background.
+    }
+
+    func applicationDidBecomeActive(_ application: UIApplication) {
+        // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
+    }
+
+    func applicationWillTerminate(_ application: UIApplication) {
+        // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
+    }
+
+
+}
+

CoViewingExample/Assets.xcassets/AppIcon.appiconset/Contents.json

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+{
+  "images" : [
+    {
+      "idiom" : "iphone",
+      "size" : "20x20",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "iphone",
+      "size" : "20x20",
+      "scale" : "3x"
+    },
+    {
+      "idiom" : "iphone",
+      "size" : "29x29",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "iphone",
+      "size" : "29x29",
+      "scale" : "3x"
+    },
+    {
+      "idiom" : "iphone",
+      "size" : "40x40",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "iphone",
+      "size" : "40x40",
+      "scale" : "3x"
+    },
+    {
+      "idiom" : "iphone",
+      "size" : "60x60",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "iphone",
+      "size" : "60x60",
+      "scale" : "3x"
+    },
+    {
+      "idiom" : "ipad",
+      "size" : "20x20",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "ipad",
+      "size" : "20x20",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "ipad",
+      "size" : "29x29",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "ipad",
+      "size" : "29x29",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "ipad",
+      "size" : "40x40",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "ipad",
+      "size" : "40x40",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "ipad",
+      "size" : "76x76",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "ipad",
+      "size" : "76x76",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "ipad",
+      "size" : "83.5x83.5",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "ios-marketing",
+      "size" : "1024x1024",
+      "scale" : "1x"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

CoViewingExample/Assets.xcassets/Contents.json

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+{
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

CoViewingExample/AudioDevices/AudioDevices-Bridging-Header.h

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+//
+//  AudioDevices-Bridging-Header.h
+//  CoViewingExample
+//
+//  Copyright © 2018 Twilio Inc. All rights reserved.
+//
+
+#import "ExampleAVPlayerAudioDevice.h"

CoViewingExample/AudioDevices/ExampleAVPlayerAudioDevice.h

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+//
+//  ExampleAVPlayerAudioDevice.h
+//  CoViewingExample
+//
+//  Copyright © 2018 Twilio, Inc. All rights reserved.
+//
+
+#import <TwilioVideo/TwilioVideo.h>
+
+/*
+ * ExampleAVPlayerAudioDevice uses a VoiceProcessingIO audio unit to play audio from an MTAudioProcessingTap
+ * attached to an AVPlayerItem. The AVPlayer audio is mixed with Room audio provided by Twilio.
+ * The microphone input, and MTAudioProcessingTap output are mixed into a single recorded stream.
+ */
+@interface ExampleAVPlayerAudioDevice : NSObject <TVIAudioDevice>
+
+- (void)audioTapDidPrepare;
+
+/*
+ * Creates a processing tap bound to the device instance.
+ *
+ * @return An `MTAudioProcessingTap`, or NULL if there is an error. The caller assumes all ownership
+ * of the tap, and should call CFRelease when they are finished with it.
+ */
+- (nullable MTAudioProcessingTapRef)createProcessingTap;
+
+@end