Method and device for copying GPU video memory textures to system memories and electronic equipment

Abstract

Embodiments of the invention disclose a method and device for copying GPU video memory textures to system memories and electronic equipment. The method comprises the following steps of: copying imagedata stored in a GPU video memory texture into different target textures stored in a system memory in sequence; and when the copy of at least one frame of image data is completed, carrying out addressmapping on image data frames copied into the different target textures stored in the system memory in sequence on the basis of an order relationship of the copy times. By adoption of the method, theefficiency of copying image resources stored in GPU video memory textures to system memories can be improved, so that the video encoding frame rate and video live streaming fluency are improved.

Description

technical field [0001] The embodiments of the present invention relate to the field of computers, and in particular to a method, device and electronic equipment for copying GPU memory textures to system memory. Background technique [0002] In the process of applying a graphics software interface (such as DirectX11), in some application scenarios, it is usually necessary to copy the image data in the graphics memory texture of the GPU (Graphics Processing Unit, graphics processing unit) to the system memory for use. For example, in a live broadcast tool, after the drawing of all video source images is completed, the pixel value of the corresponding frame image needs to be obtained from the video memory texture, so as to perform video encoding on the image. [0003] In the traditional solution, after the image of the current frame is drawn on the target texture, the relevant method is called to copy the image pixels of the current frame from the GPU memory texture to the syst...

AI Technical Summary

Problems solved by technology

However, since it takes time to copy the image data stored in the GPU memory texture to a CPU texture stored in the system memory, the process is not completed instantly. Therefore, when the corresponding function function is called, it does not mean that The image data stored on the GPU memory texture has been completely copied to the CPU texture in the system memory. If the corresponding function function (the function used to realize the copy function) is called after completion, another function function will be called immediately to copy it to the system memory. If the texture is mapped to a specific memory address, the system CPU will wait until the image data stored in the GPU memory texture has been completely copied to the CPU texture in the system memory, and then the address mapping operation will be executed. Synchronous events, obviously, the CPU is not fully utilized, there is idle time

Therefore, the execution efficiency of the current thread is seriously affected, which in turn reduces the number of times that image frames can be copied within one second, which in turn reduces the number of encoded video frames within one second, and finally causes the entire live video stream to be stuck and not smooth.

Images