S32 Design StudioのトピックRe: [S32V234] isp_h264dec_single_stream

[S32V234] isp_h264dec_single_stream

bruno_chen — Sun, 16 Dec 2018 13:40:00 GMT

Hi, NXP,

I am trying to trace the isp demo app, isp_h264dec_single_stream, and I found this app would wait about 100us (#define SLEEP_USECS 100) every 720 bytes in function H264DataInput() in main.cpp. If I change this value to 0, there will be Sequence's error, like,

** img_1280x960.h264 file will be used as input.

Press Ctrl+C to terminate the demo.

Framebuffer mapped at 0x7f7936a000.

Sequencer other error:*** Sequencer error text:

Buffer overrun

Frm:0

Inp:0

Pro:HD

Max:64

Wrt:208

NULL pointer data.

Demo execution failed.

I would like to know why it need this delay?

BTW, I also found the other isp demo app, isp_jpeg_4stream, having similar delay (#define SLEEP_USECS 50).

And how to calculate(define) this delay time in my own apps?

Thanks,

Bruno

Re: [S32V234] isp_h264dec_single_stream

mikedoidge — Mon, 17 Dec 2018 15:02:41 GMT

Hello bruno.chen@wpi-group.com‌,

This is not the correct community to post S32V2 application-specific SW questions.

Moreover, we have stopped supporting S32V2 community group. But we still support S32V2 question using our ticketing system.

For future questions, please create the request at www.nxp.com/support using Support Requests option. Our experts will help you.

Thank you for understanding.

Mike

Re: [S32V234] isp_h264dec_single_stream

bruno_chen — Tue, 18 Dec 2018 00:18:15 GMT

Hi, Mike,

Thanks. I'll file a new tickets.

Bruno