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What is the fastest data copy method of DM3730?

andy crusoe
Prodigy 160 points
Other Parts Discussed in Thread: TVP5158, DM3730

I have captured 2D1 video data from TVP5158.

I used DMAI, the data is in BufTab(from BufTab_create), which is in cmem.

Configured Tvp5158 in line interleaved mode. 728*1252 2D1

Now,  I have to demux the video data into 2 D1.  But memcpy is not fast enough, the FPS down to 10 FPS from 25 FPS, and cpu load increase to 80%. I have also tried sdma, the cpu load decrease to 5%, but FPS down to 10 FPS.


How to solve this problem?  I don't used sdma correctly?


Or there are other methods to copy video data for DM3730?  What is the fastest data copy of DM3730? 

  • 0
    Prodigy 160 points

    I have to copy data 576*2 + 2 +2= 1156 times.

    576 lines, length 720*2.  2D1 plus 2

    2+2 is 720*576*2 byte data

    So， 1FPS have to copy 1156 times. I have to captured PAL, so 1156*25 = 28800 times per secend!


    Now, how to copy this data ???

  • 0 in reply to andy crusoe
    Prodigy 20 points

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    my email:mapdog@sina.com