RosyWriter

This sample demonstrates how to use AVCaptureVideoDataOutput to bring frames from the camera into various processing pipelines, including CPU-based, OpenGL (i.e. on the GPU), CoreImage filters, and OpenCV. It also demonstrates best practices for writing the processed output of these pipelines to a movie file using AVAssetWriter.

The project includes a different target for each of the different processing pipelines.

Classes

RosyWriterViewController

-- This file contains the view controller logic, including support for the Record button and video preview.

RosyWriterCapturePipeline

-- This file manages the audio and video capture pipelines, including the AVCaptureSession, the various queues, and resource management.

Renderers

RosyWriterRenderer

-- This file defines a generic protocol for renderer objects used by RosyWriterCapturePipeline.

RosyWriterOpenGLRenderer

-- This file manages the OpenGL (GPU) processing for the "rosy" effect and delivers rendered buffers.

RosyWriterCPURenderer

-- This file manages the CPU processing for the "rosy" effect and delivers rendered buffers.

RosyWriterCIFilterRenderer

-- This file manages the CoreImage processing for the "rosy" effect and delivers rendered buffers.

RosyWriterOpenCVRenderer

-- This file manages the delivery of frames to an OpenCV processing block and delivers rendered buffers.

RosyWriterAppDelegate

-- This file is a standard application delegate class.

Shaders

myFilter

-- OpenGL shader code for the "rosy" effect

Utilities

MovieRecorder

-- Illustrates real-time use of AVAssetWriter to record the displayed effect.

OpenGLPixelBufferView

-- This is a view that displays pixel buffers on the screen using OpenGL.

GL

-- Utilities used by the GL processing pipeline.

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