自更新到 iOS 10.2 后几帧后无法在 GLKView 上绘制 CIImage？

Question

在我的应用程序中使用以下代码，在我使用 iOS <= 10.1.*

将设备更新到 iOS 10.2.1 后，它已停止工作。我调用它的几帧应用程序只是因内存不足警告而崩溃。而使用 iOS 10.1.1 及以下版本，即使在 iPhone 5S 等较旧的设备上，我也能顺利运行该应用程序。

[_glkView bindDrawable];  

if (self.eaglContext != [EAGLContext currentContext])  
[EAGLContext setCurrentContext:self.eaglContext];  

glClearColor(0.0, 0.0, 0.0, 1.0);  
glClear(GL_COLOR_BUFFER_BIT);  

glEnable(GL_BLEND);  
glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);  

if (ciImage) {  
    [_ciContext drawImage:ciImage inRect:gvRect fromRect:dRect];  
}  

[_glkView display];

这就是我制作 CIImage 的方式。

- (CIImage*)ciImageFromPixelBuffer:(CVPixelBufferRef)pixelBuffer ofSampleBuffer:(CMSampleBufferRef)sampleBuffer {
CIImage *croppedImage           = nil;

CFDictionaryRef attachments     = CMCopyDictionaryOfAttachments(kCFAllocatorDefault, sampleBuffer, kCMAttachmentMode_ShouldPropagate);
CIImage *ciImage                = [CIImage imageWithCVPixelBuffer:pixelBuffer options:(NSDictionary *)attachments];

if (attachments)
    CFRelease(attachments);

croppedImage = ciImage;


    CIFilter *scaleFilter = [CIFilter filterWithName:@"CILanczosScaleTransform"];
    [scaleFilter setValue:croppedImage forKey:@"inputImage"];
    [scaleFilter setValue:[NSNumber numberWithFloat:self.zoom_Resize_Factor == 1 ? 0.25 : 0.5] forKey:@"inputScale"];
    [scaleFilter setValue:[NSNumber numberWithFloat:1.0] forKey:@"inputAspectRatio"];
    croppedImage = [scaleFilter valueForKey:@"outputImage"];


    NSDictionary *options = @{(id)kCIImageAutoAdjustRedEye : @(false)};

    NSArray *adjustments = [ciImage autoAdjustmentFiltersWithOptions:options];
    for (CIFilter *filter in adjustments) {
        [filter setValue:croppedImage forKey:kCIInputImageKey];
        croppedImage = filter.outputImage;
    }

CIFilter *selectedFilter = [VideoFilterFactory getFilterWithType:self.selectedFilterType]; //This line needs to be removed from here

croppedImage = [VideoFilterFactory applyFilter:selectedFilter OnImage:croppedImage];

CVPixelBufferUnlockBaseAddress(pixelBuffer, 0);

return croppedImage;
}

这是 VM Tracker 和 OpenGL ES 仪器结果的图像 link http://imgur.com/a/u6Vyo。万一它易于理解。谢谢。

Answer 1

您的 GLKView 渲染实现看起来不错，问题似乎出在将 PixelBuffer 转换为 CIImage 后的处理量。

此外，您分享的 Imgur link 显示 GLKView 无法正确准备 VideoTexture 对象，这很可能是由于在每次迭代中创建的内存过载。您需要优化此 CIFilter 处理。

自更新到 iOS 10.2 后几帧后无法在 GLKView 上绘制 CIImage？

Unable to draw CIImage on GLKView after few frames since updated to iOS 10.2?

objective-c

core-image

avfoundation

ios

ios10.2