Merge pull request #11 from noppefoxwolf/hotfix/FatalWhenPlaybackFailure

assetのreset失敗時にpauseなどを呼ぶとfatalErrorになる問題

Author: noppefoxwolf

Example/Kitsunebi.xcodeproj/project.pbxproj

@@ -41,6 +41,15 @@
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
       shouldUseLaunchSchemeArgsEnv = "YES">
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "607FACCF1AFB9204008FA782"
+            BuildableName = "Kitsunebi_Example.app"
+            BlueprintName = "Kitsunebi_Example"
+            ReferencedContainer = "container:Kitsunebi.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
       <Testables>
          <TestableReference
             skipped = "NO">
@@ -52,18 +61,17 @@
                ReferencedContainer = "container:Kitsunebi.xcodeproj">
             </BuildableReference>
          </TestableReference>
+         <TestableReference
+            skipped = "NO">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "D74145BC255E72CD00B2AECA"
+               BuildableName = "Tests.xctest"
+               BlueprintName = "Tests"
+               ReferencedContainer = "container:Kitsunebi.xcodeproj">
+            </BuildableReference>
+         </TestableReference>
       </Testables>
-      <MacroExpansion>
-         <BuildableReference
-            BuildableIdentifier = "primary"
-            BlueprintIdentifier = "607FACCF1AFB9204008FA782"
-            BuildableName = "Kitsunebi_Example.app"
-            BlueprintName = "Kitsunebi_Example"
-            ReferencedContainer = "container:Kitsunebi.xcodeproj">
-         </BuildableReference>
-      </MacroExpansion>
-      <AdditionalOptions>
-      </AdditionalOptions>
    </TestAction>
    <LaunchAction
       buildConfiguration = "Debug"
@@ -85,8 +93,6 @@
             ReferencedContainer = "container:Kitsunebi.xcodeproj">
          </BuildableReference>
       </BuildableProductRunnable>
-      <AdditionalOptions>
-      </AdditionalOptions>
    </LaunchAction>
    <ProfileAction
       buildConfiguration = "Release"

Example/Kitsunebi.xcodeproj/xcshareddata/xcschemes/Kitsunebi-Example.xcscheme

@@ -5,3 +5,7 @@ platform :ios, '12.0'
 target 'Kitsunebi_Example' do
   pod 'Kitsunebi', :path => '../'
 end
+
+target 'Tests' do
+  pod 'Kitsunebi', :path => '../'
+end

Example/Podfile

@@ -11,6 +11,7 @@ EXTERNAL SOURCES:
 SPEC CHECKSUMS:
   Kitsunebi: 728531ae3060c166376b1a118c9a22b0f01e9d90
 
-PODFILE CHECKSUM: fd524ebd71fba6c1aaaa283f1d3b32f80fd19cda
+PODFILE CHECKSUM: 76ed2f2b7a60b498883386901c667ffa48dbcb69
+
+COCOAPODS: 1.10.0
 
-COCOAPODS: 1.9.3

Example/Podfile.lock

@@ -0,0 +1,19 @@
+//
+//  AssetTests.swift
+//  Kitsunebi
+//
+//  Created by Tomoya Hirano on 2020/11/13.
+//  Copyright © 2020 CocoaPods. All rights reserved.
+//
+
+@testable import Kitsunebi
+import XCTest
+
+class AssetTests: XCTestCase {
+  func testNotFatalBeforeReset() {
+    let asset = Asset(url: URL(fileURLWithPath: ""))
+    _ = asset.status
+    XCTAssert(true, "Pass")
+  }
+}
+

Example/Tests/AssetTests.swift

@@ -3,7 +3,7 @@
 <plist version="1.0">
 <dict>
 	<key>CFBundleDevelopmentRegion</key>
-	<string>en</string>
+	<string>$(DEVELOPMENT_LANGUAGE)</string>
 	<key>CFBundleExecutable</key>
 	<string>$(EXECUTABLE_NAME)</string>
 	<key>CFBundleIdentifier</key>
@@ -13,11 +13,9 @@
 	<key>CFBundleName</key>
 	<string>$(PRODUCT_NAME)</string>
 	<key>CFBundlePackageType</key>
-	<string>BNDL</string>
+	<string>$(PRODUCT_BUNDLE_PACKAGE_TYPE)</string>
 	<key>CFBundleShortVersionString</key>
 	<string>1.0</string>
-	<key>CFBundleSignature</key>
-	<string>????</string>
 	<key>CFBundleVersion</key>
 	<string>1</string>
 </dict>

Example/Tests/Info.plist

@@ -1,28 +1,33 @@
+//
+//  Tests.swift
+//  Tests
+//
+//  Created by Tomoya Hirano on 2020/11/13.
+//  Copyright © 2020 CocoaPods. All rights reserved.
+//
+
 import XCTest
-import Kitsunebi
 
 class Tests: XCTestCase {
-    
-    override func setUp() {
-        super.setUp()
+
+    override func setUpWithError() throws {
         // Put setup code here. This method is called before the invocation of each test method in the class.
     }
-    
-    override func tearDown() {
+
+    override func tearDownWithError() throws {
         // Put teardown code here. This method is called after the invocation of each test method in the class.
-        super.tearDown()
     }
-    
-    func testExample() {
+
+    func testExample() throws {
         // This is an example of a functional test case.
-        XCTAssert(true, "Pass")
+        // Use XCTAssert and related functions to verify your tests produce the correct results.
     }
-    
-    func testPerformanceExample() {
+
+    func testPerformanceExample() throws {
         // This is an example of a performance test case.
-        self.measure() {
+        measure {
             // Put the code you want to measure the time of here.
         }
     }
-    
+
 }

Example/Tests/Tests.swift

@@ -12,39 +12,41 @@ final class Asset {
     kCVPixelBufferMetalCompatibilityKey as String : true,
   ]
   let asset: AVURLAsset
-  lazy var reader: AVAssetReader = { preconditionFailure() }()
-  lazy var output: AVAssetReaderTrackOutput = { preconditionFailure() }()
-  var status: AVAssetReader.Status { return reader.status }
-  var isRunning: Bool { return reader.status != .completed && reader.status != .cancelled }
+  private var reader: AVAssetReader? = nil
+  private var output: AVAssetReaderTrackOutput? = nil
+  var status: AVAssetReader.Status? { reader?.status }
 
   init(url: URL) {
     asset = AVURLAsset(url: url)
   }
 
   func reset() throws {
-    reader = try AVAssetReader(asset: asset)
-    output = AVAssetReaderTrackOutput(track: asset.tracks(withMediaType: AVMediaType.video)[0], outputSettings: outputSettings)
+    let reader = try AVAssetReader(asset: asset)
+    let output = AVAssetReaderTrackOutput(track: asset.tracks(withMediaType: AVMediaType.video)[0], outputSettings: outputSettings)
     if reader.canAdd(output) {
       reader.add(output)
     } else {
       throw Error.cannotAddOutput
     }
     output.alwaysCopiesSampleData = false
     reader.startReading()
+    
+    self.reader = reader
+    self.output = output
   }
 
   func cancelReading() {
-    reader.cancelReading()
+    reader?.cancelReading()
   }
 
   func copyNextImageBuffer() throws -> CVImageBuffer {
-    if let error = reader.error {
+    if let error = reader?.error {
       throw error
     }
     if status != .reading {
       throw AssetError.readerWasStopped
     }
-    if let sampleBuffer = output.copyNextSampleBuffer(), let imageBuffer = CMSampleBufferGetImageBuffer(sampleBuffer) {
+    if let sampleBuffer = output?.copyNextSampleBuffer(), let imageBuffer = CMSampleBufferGetImageBuffer(sampleBuffer) {
       return imageBuffer
     } else {
       throw AssetError.readerNotReturnedImage