public void SetupGL()
{
EAGLContext.SetCurrentContext(context);
SetupBuffers();
LoadShaders();
GL.UseProgram(Program);
// 0 and 1 are the texture IDs of lumaTexture and chromaTexture respectively.
GL.Uniform1(uniforms [(int)UniformIndex.Y], 0);
GL.Uniform1(uniforms [(int)UniformIndex.UV], 1);
GL.Uniform1(uniforms [(int)UniformIndex.RotationAngle], 0);
GL.UniformMatrix3(uniforms [(int)UniformIndex.ColorConversionMatrix], 1, false, preferredConversion);
if (videoTextureCache != null)
{
return;
}
videoTextureCache = CVOpenGLESTextureCache.FromEAGLContext(context);
if (videoTextureCache == null)
{
Console.WriteLine("Error at CVOpenGLESTextureCache.FromEAGLContext");
}
}
private bool CreateFrameBuffer()
{
var success = true;
GL.Disable(EnableCap.DepthTest);
GL.GenFramebuffers(1, out frameBuffer);
GL.BindFramebuffer(FramebufferTarget.Framebuffer, frameBuffer);
GL.GenRenderbuffers(1, out colorBuffer);
GL.BindRenderbuffer(RenderbufferTarget.Renderbuffer, colorBuffer);
context.RenderBufferStorage((uint)All.Renderbuffer, (CAEAGLLayer)Layer);
GL.GetRenderbufferParameter(RenderbufferTarget.Renderbuffer, RenderbufferParameterName.RenderbufferWidth, out renderBufferWidth);
GL.GetRenderbufferParameter(RenderbufferTarget.Renderbuffer, RenderbufferParameterName.RenderbufferHeight, out renderBufferHeight);
GL.FramebufferRenderbuffer(FramebufferTarget.Framebuffer, FramebufferSlot.ColorAttachment0, RenderbufferTarget.Renderbuffer, colorBuffer);
if (GL.CheckFramebufferStatus(FramebufferTarget.Framebuffer) != FramebufferErrorCode.FramebufferComplete)
{
Console.WriteLine("Failure with framebuffer generation");
success = false;
}
// Create a new CVOpenGLESTexture Cache
videoTextureCache = CVOpenGLESTextureCache.FromEAGLContext(context);
glProgram = CreateProgram();
return(success && (glProgram != 0));
}
private void SetupAVCapture(NSString sessionPreset)
{
if ((this.VideoTextureCache = CVOpenGLESTextureCache.FromEAGLContext(this.context)) == null)
{
Console.WriteLine("Could not create the CoreVideo TextureCache");
return;
}
this.session = new AVCaptureSession();
this.session.BeginConfiguration();
// Preset size
this.session.SessionPreset = sessionPreset;
// Input device
var videoDevice = AVCaptureDevice.GetDefaultDevice(AVMediaType.Video);
if (videoDevice == null)
{
Console.WriteLine("No video device");
return;
}
var input = new AVCaptureDeviceInput(videoDevice, out NSError error);
if (error != null)
{
Console.WriteLine("Error creating video capture device");
return;
}
this.session.AddInput(input);
// Create the output device
using (var dataOutput = new AVCaptureVideoDataOutput())
{
dataOutput.AlwaysDiscardsLateVideoFrames = true;
// YUV 420, use "BiPlanar" to split the Y and UV planes in two separate blocks of
// memory, then we can index 0 to get the Y and 1 for the UV planes in the frame decoding
//VideoSettings = new AVVideoSettings (CVPixelFormatType.CV420YpCbCr8BiPlanarFullRange)
this.dataOutputDelegate = new DataOutputDelegate(this);
//
// This dispatches the video frames into the main thread, because the OpenGL
// code is accessing the data synchronously.
//
dataOutput.SetSampleBufferDelegateQueue(this.dataOutputDelegate, DispatchQueue.MainQueue);
this.session.AddOutput(dataOutput);
}
this.session.CommitConfiguration();
this.session.StartRunning();
}
public void SetupOffScreenRenderContext()
{
//-- Create CVOpenGLESTextureCacheRef for optimal CVPixelBufferRef to GLES texture conversion.
if (VideoTextureCache != null)
{
VideoTextureCache.Dispose();
VideoTextureCache = null;
}
VideoTextureCache = CVOpenGLESTextureCache.FromEAGLContext(CurrentContext);
GL.Disable(EnableCap.DepthTest);
GL.GenFramebuffers(1, out OffscreenBufferHandle);
GL.BindFramebuffer(FramebufferTarget.Framebuffer, OffscreenBufferHandle);
}
