How to pass the decoded images to to the EGL renderer without any extra memory copy?

Robotics & Edge Computing Jetson Systems Jetson Nano
1

Hello,

I want to know the principle.
Can you explain how to pass the decoded image to the EGL renderer (principle) without additional memory copy?

image
image1398×432 21.1 KB

Thank you.

3

Hi,
The implementation of redering is

/usr/src/jetson_multimedia_api/samples/common/classes/NvEglRenderer.cpp

The function is

    /**
     * Renders a buffer.
     *
     * This method waits until the rendering time of the next buffer,
     * caluclated from the rendering time of the last buffer and the
     * render rate in frames per second (fps). This is a blocking
     * call.
     *
     * @param[in] fd Specifies the file descriptor (FD) of the exported buffer
     *               to render.
     * @return 0 for success, -1 otherwise.
     */
    int render(int fd);