Combined engine for video and graphics processing
View Patent ↗The system includes an arbiter, a combined engine, a frame buffer, and a display processing unit. The arbiter provides three input channels: a first channel for graphics, a second channel for video and a third channel for processor. The arbiter performs prioritization and arbitration between the video and graphics and processor requests sent to the system. The arbiter has three output ports coupled to the combined engine. The combined engine is a hardware engine capable of processing either video data or graphics data. The output of the combined engine is provided to the frame buffer for the storage of pixel data. The output of the frame buffer is coupled to a display processing unit that renders the pixel data for display.
1. A system for processing video and graphics data, comprising:
an arbiter having a first input, a second input, a third input and an output, the arbiter performing prioritization and arbitration between the video, graphics and processor requests, the arbiter outputting data and commands selected from the first input, the second input and the third input of the arbiter; and
a combined engine having input ports, a data output and a control input for processing graphics and video data, the combined engine selectively processing either video data or graphics data in response to a signal on the control input of the combined engine, the input ports of the combined engine coupled to the output of the arbiter,
wherein the combined engine includes a scaler having an input and an output for performing video scaling, filtering, and scan conversion, the input of the scaler coupled to input ports of the combined engine, and
wherein the combined engine includes a color conversion unit having an input and an output for performing color conversion, the input of the color conversion unit coupled to input ports of the combined engine and to the scaler output, enabling one pass scaling and color conversion.
2. The system of claim 1 , wherein the combined engine switches between processing different streams of video, graphics, or CPU data when a scan count identifies vertical blanking time.
3. The system of claim 1 , wherein the combined engine includes a memory execution unit having inputs and an output for performing mirroring and rotation, the inputs of the memory execution unit coupled to input ports of the combined engine.