Merge pull request #126 from AgoraIO/dev/macos

Add mediaIO video source switching example for macOS

Author: xia ning

macOS/APIExample/Examples/Advanced/CustomVideoSourceMediaIO/Base.lproj/CustomVideoSourceMediaIO.storyboard

@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<document type="com.apple.InterfaceBuilder3.Cocoa.Storyboard.XIB" version="3.0" toolsVersion="17701" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none" useAutolayout="YES">
+<document type="com.apple.InterfaceBuilder3.Cocoa.Storyboard.XIB" version="3.0" toolsVersion="17506" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none" useAutolayout="YES">
     <dependencies>
         <deployment identifier="macosx"/>
-        <plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="17701"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="17506"/>
         <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
     </dependencies>
     <scenes>
@@ -77,6 +77,10 @@
                                                     <rect key="frame" x="27" y="330" width="260" height="50"/>
                                                     <autoresizingMask key="autoresizingMask" widthSizable="YES" flexibleMinY="YES"/>
                                                 </view>
+                                                <view id="q1j-uo-tMi" customClass="Picker" customModule="APIExample" customModuleProvider="target">
+                                                    <rect key="frame" x="27" y="279" width="260" height="50"/>
+                                                    <autoresizingMask key="autoresizingMask" widthSizable="YES" flexibleMinY="YES"/>
+                                                </view>
                                             </subviews>
                                         </view>
                                     </subviews>
@@ -116,6 +120,7 @@
                         <outlet property="selectFpsPicker" destination="ddH-cU-D74" id="G81-jb-kIg"/>
                         <outlet property="selectLayoutPicker" destination="IUu-Lm-BTO" id="55M-bG-2ib"/>
                         <outlet property="selectResolutionPicker" destination="nN4-UK-bQr" id="1SY-Qr-9Bo"/>
+                        <outlet property="videoSourceSwitcher" destination="q1j-uo-tMi" id="mZh-9Y-SrK"/>
                     </connections>
                 </viewController>
                 <customObject id="S9U-UI-b0n" userLabel="First Responder" customClass="NSResponder" sceneMemberID="firstResponder"/>

macOS/APIExample/Examples/Advanced/CustomVideoSourceMediaIO/CustomVideoSourceMediaIO.swift

@@ -117,6 +117,29 @@ class CustomVideoSourceMediaIO: BaseViewController {
         }
     }
 
+    @IBOutlet weak var videoSourceSwitcher: Picker!
+    let sources = [Layout("AVCaptureDevice", 1), Layout("AgoraRtcDefaultCamera", 2)]
+    var selectedSource: Layout? {
+        let index = self.videoSourceSwitcher.indexOfSelectedItem
+        if index >= 0 && index < sources.count {
+            return sources[index]
+        } else {
+            return nil
+        }
+    }
+    func initVideoSourceSwitcher() {
+        videoSourceSwitcher.label.stringValue = "Video Source".localized
+        videoSourceSwitcher.picker.addItems(withTitles: sources.map { $0.label })
+        videoSourceSwitcher.onSelectChanged {
+            guard let source = self.selectedSource else { return }
+            if source.value == 2 {
+                self.agoraKit.setVideoSource(AgoraRtcDefaultCamera())
+            } else if source.value == 1 {
+                self.agoraKit.setVideoSource(self.customCamera)
+            }
+        }
+    }
+    
     /**
      --- Channel TextField ---
      */
@@ -164,6 +187,7 @@ class CustomVideoSourceMediaIO: BaseViewController {
         initSelectLayoutPicker()
         initChannelField()
         initJoinChannelButton()
+        initVideoSourceSwitcher()
     }
 
     override func viewWillBeRemovedFromSplitView() {

macOS/APIExample/Localizable.strings

@@ -153,3 +153,4 @@
 "Send" = "发送";
 "Sending" = "发送中";
 "Raw Audio Data" = "音频裸数据";
+"Video Source" = "视频源选择";