Question

在我的应用程序中使用以下代码，该代码执行得很安静，可以在AVCaptureOutput -didOutputSampleBuffer上一次又一次地在GLKView上绘制CIImage，直到我使用iOS＆lt; = 10.1。*

将设备更新到iOS 10.2.1后，它已停止工作。我正在调用它几帧，应用程序崩溃与低内存警告。而对于iOS 10.1.1及更低版本，我甚至可以在iPhone 5S等旧设备上顺畅运行应用程序。

[_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工具的结果的imgur链接 http://imgur.com/a/u6Vyo。如果它易于理解。感谢。

Answer 1

您的GLKView渲染实现看起来很好，问题似乎来自PixelBuffer在将其转换为CIImage后所做的处理量。

此外，您共享的Imgur链接显示GLKView无法正确准备VideoTexture对象，这很可能是由于每次迭代中都会创建内存过载。您需要优化此CIFilter处理。

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

1 个答案: