Data playback control method and system for self-adaptive data caching

Abstract

The invention discloses a data playback control method and system for adaptive data caching, and the method comprises the steps: respectively generating test data when a starting signal is detected, starting DMA (Direct Memory Access), transmitting the test data to a corresponding DDR (Double Data Rate) channel, and recording the transmission delay corresponding to the DDR channel when the test data is transmitted to the corresponding DDR channel; when a channel signal playback task request is detected, according to the sampling rate and the transmission delay corresponding to the DDR channel, obtaining a minimum playback threshold corresponding to the DDR channel and used for triggering playback data transmission; and detecting the playback data volume cached in the DDR channel in real time, and when the playback data volume is greater than the minimum playback threshold value, sending the playback data to playback equipment through an arbitration module. By means of reasonable setting, the minimum playback threshold value during normal work of the system can be guaranteed, delay of playback starting is reduced, and ordered transmission of data is guaranteed.

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