New upstream version 26.1.0+dfsg1

plugins/mac-virtualcam/src/dal-plugin/OBSDALMachClient.mm

@@ -0,0 +1,140 @@
+//
+//  MachClient.m
+//  dal-plugin
+//
+//  Created by John Boiles  on 5/5/20.
+//
+
+#import "OBSDALMachClient.h"
+#import "MachProtocol.h"
+#import "Logging.h"
+
+@interface OBSDALMachClient () <NSPortDelegate> {
+	NSPort *_receivePort;
+}
+@end
+
+@implementation OBSDALMachClient
+
+- (void)dealloc
+{
+	DLogFunc(@"");
+	_receivePort.delegate = nil;
+}
+
+- (NSPort *)serverPort
+{
+// See note in MachServer.mm and don't judge me
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
+	return [[NSMachBootstrapServer sharedInstance]
+		portForName:@MACH_SERVICE_NAME];
+#pragma clang diagnostic pop
+}
+
+- (BOOL)isServerAvailable
+{
+	return [self serverPort] != nil;
+}
+
+- (NSPort *)receivePort
+{
+	if (_receivePort == nil) {
+		NSPort *receivePort = [NSMachPort port];
+		_receivePort = receivePort;
+		_receivePort.delegate = self;
+		__weak __typeof(self) weakSelf = self;
+		dispatch_async(
+			dispatch_get_global_queue(
+				DISPATCH_QUEUE_PRIORITY_DEFAULT, 0),
+			^{
+				NSRunLoop *runLoop = [NSRunLoop currentRunLoop];
+				[runLoop addPort:receivePort
+					 forMode:NSDefaultRunLoopMode];
+				// weakSelf should become nil when this object gets destroyed
+				while (weakSelf) {
+					[[NSRunLoop currentRunLoop]
+						runUntilDate:
+							[NSDate dateWithTimeIntervalSinceNow:
+									0.1]];
+				}
+				DLog(@"Shutting down receive run loop");
+			});
+		DLog(@"Initialized mach port %d for receiving",
+		     ((NSMachPort *)_receivePort).machPort);
+	}
+	return _receivePort;
+}
+
+- (BOOL)connectToServer
+{
+	DLogFunc(@"");
+
+	NSPort *sendPort = [self serverPort];
+	if (sendPort == nil) {
+		ELog(@"Unable to connect to server port");
+		return NO;
+	}
+
+	NSPortMessage *message = [[NSPortMessage alloc]
+		initWithSendPort:sendPort
+		     receivePort:self.receivePort
+		      components:nil];
+	message.msgid = MachMsgIdConnect;
+
+	NSDate *timeout = [NSDate dateWithTimeIntervalSinceNow:5.0];
+	if (![message sendBeforeDate:timeout]) {
+		ELog(@"sendBeforeDate failed");
+		return NO;
+	}
+
+	return YES;
+}
+
+- (void)handlePortMessage:(NSPortMessage *)message
+{
+	VLogFunc(@"");
+	NSArray *components = message.components;
+	switch (message.msgid) {
+	case MachMsgIdConnect:
+		DLog(@"Received connect response");
+		break;
+	case MachMsgIdFrame:
+		VLog(@"Received frame message");
+		if (components.count >= 6) {
+			CGFloat width;
+			[components[0] getBytes:&width length:sizeof(width)];
+			CGFloat height;
+			[components[1] getBytes:&height length:sizeof(height)];
+			uint64_t timestamp;
+			[components[2] getBytes:&timestamp
+					 length:sizeof(timestamp)];
+			VLog(@"Received frame data: %fx%f (%llu)", width,
+			     height, timestamp);
+			NSData *frameData = components[3];
+			uint32_t fpsNumerator;
+			[components[4] getBytes:&fpsNumerator
+					 length:sizeof(fpsNumerator)];
+			uint32_t fpsDenominator;
+			[components[5] getBytes:&fpsDenominator
+					 length:sizeof(fpsDenominator)];
+			[self.delegate
+				receivedFrameWithSize:NSMakeSize(width, height)
+					    timestamp:timestamp
+					 fpsNumerator:fpsNumerator
+				       fpsDenominator:fpsDenominator
+					    frameData:frameData];
+		}
+		break;
+	case MachMsgIdStop:
+		DLog(@"Received stop message");
+		[self.delegate receivedStop];
+		break;
+	default:
+		ELog(@"Received unexpected response msgid %u",
+		     (unsigned)message.msgid);
+		break;
+	}
+}
+
+@end