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src,build: port CGDisplayStream capturing to ScreenCaptureKit
Closes #10
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,18 @@ | ||
| #import <ScreenCaptureKit/ScreenCaptureKit.h> | ||
| #import <CoreGraphics/CoreGraphics.h> | ||
| #import <CoreMedia/CoreMedia.h> | ||
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| NS_ASSUME_NONNULL_BEGIN | ||
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| @interface ScreenCapturer : NSObject <SCStreamDelegate, SCStreamOutput> | ||
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| - (instancetype)initWithDisplay:(CGDirectDisplayID)displayID | ||
| frameHandler:(nonnull void (^)(CMSampleBufferRef sampleBuffer))frameHandler | ||
| errorHandler:(nonnull void (^)(NSError *error))errorHandler; | ||
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| - (void)startCapture; | ||
| - (void)stopCapture; | ||
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| @end | ||
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| NS_ASSUME_NONNULL_END |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,105 @@ | ||
| #import "ScreenCapturer.h" | ||
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| @interface ScreenCapturer () | ||
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| @property (nonatomic, assign) CGDirectDisplayID displayID; | ||
| @property (nonatomic, strong) SCStream *stream; | ||
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| // handlers | ||
| @property (nonatomic, copy, nonnull) void (^frameHandler)(CMSampleBufferRef sampleBuffer); | ||
| @property (nonatomic, copy, nonnull) void (^errorHandler)(NSError *error); | ||
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| @end | ||
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| @implementation ScreenCapturer | ||
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| - (instancetype)initWithDisplay:(CGDirectDisplayID)displayID | ||
| frameHandler:(void (^)(CMSampleBufferRef))frameHandler | ||
| errorHandler:(void (^)(NSError *))errorHandler { | ||
| if (self = [super init]) { | ||
| _displayID = displayID; | ||
| _frameHandler = [frameHandler copy]; | ||
| _errorHandler = [errorHandler copy]; | ||
| } | ||
| return self; | ||
| } | ||
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| - (void)startCapture { | ||
| [SCShareableContent getShareableContentWithCompletionHandler:^(SCShareableContent *content, NSError *error) { | ||
| if (error) { | ||
| self.errorHandler(error); | ||
| return; | ||
| } | ||
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| SCDisplay *display = content.displays[[content.displays indexOfObjectPassingTest:^BOOL(SCDisplay *_Nonnull d, NSUInteger idx, BOOL *_Nonnull stop) { | ||
| return d.displayID == self.displayID; | ||
| }]]; | ||
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| if (!display) { | ||
| NSError *noDisplayError = [NSError errorWithDomain:@"ScreenCapturerErrorDomain" | ||
| code:1 | ||
| userInfo:@{NSLocalizedDescriptionKey : @"Display not available for capture"}]; | ||
| self.errorHandler(noDisplayError); | ||
| return; | ||
| } | ||
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| SCStreamConfiguration *config = [[SCStreamConfiguration alloc] init]; | ||
| // can later be adjusted for server-side scaling | ||
| config.width = display.width; | ||
| config.height = display.height; | ||
| // set max frame rate to 60 FPS | ||
| config.minimumFrameInterval = CMTimeMake(1, 60); | ||
| config.pixelFormat = kCVPixelFormatType_32BGRA; | ||
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| SCContentFilter *filter = [[SCContentFilter alloc] initWithDisplay:(display) excludingWindows:(@[])]; | ||
| self.stream = [[SCStream alloc] initWithFilter:filter configuration:config delegate:self]; | ||
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| NSError *addOutputError = nil; | ||
| [self.stream addStreamOutput:self | ||
| type:SCStreamOutputTypeScreen | ||
| sampleHandlerQueue:dispatch_queue_create("libvncserver.examples.mac", NULL) | ||
| error:&addOutputError]; | ||
| if (addOutputError) { | ||
| self.errorHandler(addOutputError); | ||
| return; | ||
| } | ||
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| [self.stream startCaptureWithCompletionHandler:^(NSError * _Nullable startError) { | ||
| if (startError) { | ||
| self.errorHandler(startError); | ||
| } | ||
| }]; | ||
| }]; | ||
| } | ||
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| - (void)stopCapture { | ||
| [self.stream stopCaptureWithCompletionHandler:^(NSError * _Nullable stopError) { | ||
| if (stopError) { | ||
| self.errorHandler(stopError); | ||
| } | ||
| self.stream = nil; | ||
| }]; | ||
| } | ||
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| /* | ||
| SCStreamDelegate methods | ||
| */ | ||
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| - (void) stream:(SCStream *) stream didStopWithError:(NSError *) error { | ||
| self.errorHandler(error); | ||
| } | ||
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| /* | ||
| SCStreamOutput methods | ||
| */ | ||
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| - (void)stream:(SCStream *)stream didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer ofType:(SCStreamOutputType)type { | ||
| if (type == SCStreamOutputTypeScreen) { | ||
| self.frameHandler(sampleBuffer); | ||
| } | ||
| } | ||
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| @end |
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