Я разрабатываю CGImage, и он отлично работает, когда программа отображает его на экране, используя это:
[output_view.layer performSelectorOnMainThread:@selector(setContents:) withObject: (id) image waitUntilDone:YES];
Теперь при этом вылетает приложение:
UIImageWriteToSavedPhotosAlbum([UIImage imageWithCGImage: image)],nil,nil,nil);
Я совсем не понимаю. Вот стек во время аварии:
#0 0x33b5db6e in memmove (Line 65)
#1 0x341ddee2 in CGAccessSessionGetBytes
#2 0x31ab4488 in alphaProviderGetBytes
#3 0x341ddf52 in CGAccessSessionGetBytes
#4 0x31abbc80 in writeOne
#5 0x31abbdae in _CGImagePluginWriteJPEG
#6 0x31ab2ddc in CGImageDestinationFinalize
#7 0x3037eda2 in imageDataFromImageWithFormatAndProperties
#8 0x3037effc in imageDataFromImageRef
#9 0x3038ea3c in __-[PLAssetsSaver _saveImage:imageData:properties:completionBlock:]_block_invoke_1
#10 0x33c32680 in _dispatch_call_block_and_release
#11 0x33c32ba0 in _dispatch_worker_thread2
#12 0x33bd7250 in _pthread_wqthread
Вот метод с проблемой:
-(void)captureOutput: (AVCaptureOutput *) captureOutput didOutputSampleBuffer: (CMSampleBufferRef) sampleBuffer fromConnection: (AVCaptureConnection *) conenction{
NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
// Get a CMSampleBuffer's Core Video image buffer for the media data
CVImageBufferRef imageBuffer = CMSampleBufferGetImageBuffer(sampleBuffer);
// Lock the base address of the pixel buffer
CVPixelBufferLockBaseAddress(imageBuffer, 0);
// Get the number of bytes per row for the pixel buffer
UInt8 * image_data = CVPixelBufferGetBaseAddress(imageBuffer);
// Get the number of bytes per row for the pixel buffer
size_t bytesPerRow = CVPixelBufferGetBytesPerRow(imageBuffer);
// Get the pixel buffer width and height
size_t width = CVPixelBufferGetWidth(imageBuffer);
size_t height = CVPixelBufferGetHeight(imageBuffer);
//Removed part here which modifies the CVPixelBuffer pixels with a particular algorithm.
[bottom_view setNeedsDisplay];
[bottom_view performSelectorOnMainThread:@selector(setBackgroundColor:) withObject: [UIColor colorWithRed:0 green:av/255.0 blue:0 alpha:1] waitUntilDone: YES];
// Create a device-dependent RGB color space
CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
// Create a Quartz image from the pixel data
CGDataProviderDirectCallbacks providerCallbacks = { 0, GetBytePointer, ReleaseBytePointer, GetBytesAtPosition, 0 };
CGDataProviderRef d_provider = CGDataProviderCreateDirect(image_data,pixels*4,&providerCallbacks);
CGImageRef image = CGImageCreate (width,height,8,32,bytesPerRow,colorSpace,kCGBitmapByteOrder32Little | kCGImageAlphaPremultipliedFirst,d_provider,NULL,true,kCGRenderingIntentDefault);
//Draw image
if (needs_photo) {
UIImageWriteToSavedPhotosAlbum([UIImage imageWithCGImage: image],nil,nil,nil);
needs_photo = NO;
}
if (recording) {
[writer_input appendSampleBuffer:sampleBuffer];
}
[output_view.layer performSelectorOnMainThread:@selector(setContents:) withObject: (id) image waitUntilDone:YES];
// Unlock the pixel buffer
CVPixelBufferUnlockBaseAddress(imageBuffer,0);
// Free up the context and color space
CGColorSpaceRelease(colorSpace);
CGImageRelease(image);
CGDataProviderRelease(d_provider);
[pool drain];
}
Спасибо за любую помощь в решении этой проблемы.