Method and device for using annular data buffer to read and write batch data

Abstract

The invention discloses a method and a device for using an annular data buffer to read and write batch data. The method includes: when a data writing request is received, a writing pointer calculates an initial position of data to be written currently in the annular data buffer to read peripheral data and write data in the annular data buffer from the initial position, and 1 is added to the numerical value of the writing pointer after writing is completed; when a data reading request is received, a reading pointer calculates the position of data needed to be read currently and reads the data from the position, and 1 is added to the numerical value of the reading pointer after reading is completed; and when the annular data buffer is abnormal, corresponding operation is performed according to the abnormal types. The writing process and the reading process are executed separately to monitor abnormality of the annular data buffer, when the annular data buffer is abnormal, the reading pointer and the writing pointer are adjusted to enable data to be read and written smoothly, and accordingly data transmission efficiency is guaranteed, and data transmission precision is further improved.

Description

technical field [0001] The invention relates to the field of image data processing, in particular to a method and device for reading and writing batch data by using a ring data buffer. Background technique [0002] In image processing, it is often necessary to collect batch data or display multiple images. Ensuring the integrity of data is the basic requirement of image processing. Therefore, data transmission and communication are the key during image processing. [0003] Usually, the data is buffered from the peripheral data to the memory of the terminal device before being processed. However, whether it is a personal computer (PC) or other embedded device terminals, the memory is always limited, and one memory is applied for buffering at a time. These data are more difficult, so it is necessary to use the data structure of the ring data buffer to solve this problem. [0004] The ring buffer is a first-in-first-out circular buffer, which usually has a read pointer and a w...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method and device for reading and writing batch data with a ring data buffer in view of the above-mentioned defects of the prior art, and use a method of combining ring buffer and queue control to solve the image processing process. The problem of mutual exclusion of read data and write data in the buffer

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