Support swift package manager

.gitignore

@@ -16,3 +16,5 @@ profile
 *.moved-aside
 DerivedData
 .idea/
+.build
+Release

LICENSE

@@ -16,4 +16,3 @@ FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-

Makefile

@@ -0,0 +1,8 @@
+build:
+	swift build
+
+release: clean
+	swift build --configuration=release --build-path ./Release
+
+clean:
+	rm -rf ./.build

Package.swift

@@ -0,0 +1,21 @@
+// swift-tools-version:5.2
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+
+import PackageDescription
+
+let package = Package(
+    name: "SPMAssetExporter",
+    products: [
+        .library(
+            name: "SPMAssetExporter",
+            targets: ["SPMAssetExporter"]
+      ),
+    ],
+    dependencies: [],
+    targets: [
+        .target(
+            name: "SPMAssetExporter",
+            dependencies: []
+      ),
+    ]
+)

README.md

@@ -1,3 +1,5 @@
+# SPMAssetExporter
+
 SDAVAssetExportSession
 ======================
 
@@ -8,48 +10,83 @@ You want the ease of use of `AVAssetExportSession` but default provided presets
 
 Usage Example
 -------------
-
+For ObjC:
 ``` objective-c
 SDAVAssetExportSession *encoder = [SDAVAssetExportSession.alloc initWithAsset:anAsset];
 encoder.outputFileType = AVFileTypeMPEG4;
 encoder.outputURL = outputFileURL;
 encoder.videoSettings = @
-{
+  {
     AVVideoCodecKey: AVVideoCodecH264,
     AVVideoWidthKey: @1920,
     AVVideoHeightKey: @1080,
     AVVideoCompressionPropertiesKey: @
-    {
+      {
         AVVideoAverageBitRateKey: @6000000,
         AVVideoProfileLevelKey: AVVideoProfileLevelH264High40,
-    },
-};
+      },
+  };
 encoder.audioSettings = @
 {
-    AVFormatIDKey: @(kAudioFormatMPEG4AAC),
-    AVNumberOfChannelsKey: @2,
-    AVSampleRateKey: @44100,
-    AVEncoderBitRateKey: @128000,
+  AVFormatIDKey: @(kAudioFormatMPEG4AAC),
+  AVNumberOfChannelsKey: @2,
+  AVSampleRateKey: @44100,
+  AVEncoderBitRateKey: @128000,
 };
 
 [encoder exportAsynchronouslyWithCompletionHandler:^
 {
-    if (encoder.status == AVAssetExportSessionStatusCompleted)
-    {
-        NSLog(@"Video export succeeded");
-    }
-    else if (encoder.status == AVAssetExportSessionStatusCancelled)
-    {
-        NSLog(@"Video export cancelled");
-    }
-    else
-    {
-        NSLog(@"Video export failed with error: %@ (%d)", encoder.error.localizedDescription, encoder.error.code);
-    }
+  if (encoder.status == AVAssetExportSessionStatusCompleted)
+  {
+    NSLog(@"Video export succeeded");
+  }
+  else if (encoder.status == AVAssetExportSessionStatusCancelled)
+  {
+    NSLog(@"Video export cancelled");
+  }
+  else
+  {
+    NSLog(@"Video export failed with error: %@ (%d)", encoder.error.localizedDescription, encoder.error.code);
+  }
 }];
 
 ```
 
+And for Swift:
+
+* add the package to your Xcode project (https://developer.apple.com/documentation/xcode/adding_package_dependencies_to_your_app)
+* import package
+* use it in swift code like
+
+```swift
+import SPMAssetExporter
+
+// ...
+
+let exporter = SDAVAssetExportSession(asset: asset)!
+exporter.outputFileType = processingParameters.outputFileType.rawValue
+exporter.outputURL = processingParameters.outputUrl
+exporter.videoSettings = [
+  AVVideoCodecKey: AVVideoCodecType.h264,
+  AVVideoWidthKey: targetSize.width,
+  AVVideoHeightKey: targetSize.height,
+  AVVideoCompressionPropertiesKey: [AVVideoAverageBitRateKey: 1024_000,AVVideoProfileLevelKey: AVVideoProfileLevelH264High40]
+]
+exporter.audioSettings = [
+  AVFormatIDKey: kAudioFormatMPEG4AAC,
+  AVNumberOfChannelsKey: 1,
+  AVSampleRateKey: 44100,
+  AVEncoderBitRateKey: 96_000
+]
+exporter.videoComposition = videoComposition
+
+exporter.exportAsynchronously(completionHandler: {
+  switch encoder.status {
+    // do your work here
+  }
+})
+```
+
 Licenses
 --------
 

SDAVAssetExportSession.m → Sources/SPMAssetExporter/include/SDAVAssetExportSession.m

@@ -10,7 +10,6 @@
 // file that was distributed with this source code.
 //
 
-
 #import "SDAVAssetExportSession.h"
 
 @interface SDAVAssetExportSession ()
@@ -168,7 +167,7 @@ - (void)exportAsynchronouslyWithCompletionHandler:(void (^)(void))handler
             [self.writer addInput:self.audioInput];
         }
     }
-    
+
     [self.writer startWriting];
     [self.reader startReading];
     [self.writer startSessionAtSourceTime:self.timeRange.start];
@@ -196,7 +195,7 @@ - (void)exportAsynchronouslyWithCompletionHandler:(void (^)(void))handler
     else {
         videoCompleted = YES;
     }
-    
+
     if (!self.audioOutput) {
         audioCompleted = YES;
     } else {
@@ -232,7 +231,7 @@ - (BOOL)encodeReadySamplesFromOutput:(AVAssetReaderOutput *)output toInput:(AVAs
                 handled = YES;
                 error = YES;
             }
-            
+
             if (!handled && self.videoOutput == output)
             {
                 // update the video progress