Is capture with discrete sync possible through OMX?

BenM

Other Parts Discussed in Thread: TVP7002

Hello I am wondering what set of parameters must be passed the HDVPSS core to not make it crash when embedded sync is disabled and some form of discrete sync is enabled. I have tried a variety of parameters and every time the HDVPSS core crashed and prints out "Advanced Statistics". Looking back at the source code for the M3 i see that there is something equivalent to this:

if(discrete sync is used) {

status = doSpecialVPDMAinit()

if(status== FAIL){

printAdvancedStats();

while(1);

}

I am guessing this is still in the new M3 source.

What do i have to do to not make it crash here!?

Thanks,

Ben

Current EZSDK : 5.3

Trying to run: capture_encode omx demo

over 13 years ago

0 HardikShah over 13 years ago

TI__Mastermind 20245 points

Hi,

You need to take care of following errata while pumping discrete sync signal. Otherwise you may see same behavior as you are seeing. Advisory 1.1.10 Discrete Sync Capture Style Line ACTVID Does Not Work in errata document at http://www.ti.com/lit/er/sprz329a/sprz329a.pdf

Regards,

Hardik Shah

0 richard lee2 over 13 years ago in reply to HardikShah

Intellectual 490 points

i saw ACTVID problem in errata for 8168, but there is no such

comment in errata for 8148. Then, can we safely use 8148 with

discrete sync without modifying ACTVID ?

0 Brijesh Jadav over 13 years ago in reply to richard lee2

TI__Guru**** 475325 points

Yes, you can use 8148 for discrete sync capture without toggling ACTVID in VBI. one question, are you planning to use scalar in the capture path?

Thanks,

Brijesh Jadav

0 richard lee2 over 13 years ago in reply to Brijesh Jadav

Intellectual 490 points

Thanks for your reply.

What do you mean by scalar ? If you meant changing the captured video size, it is NOT.

I just want to get video 720p from VIP and store them in the same size after encoding.

Best regards,

Richad Lee.

0 richard lee2 over 13 years ago in reply to Brijesh Jadav

Intellectual 490 points

following post is another question related to this post.

i am currently trying to connect discrete sync camera module to VIP. But, i am not

sure whether signal available is sufficient or additional signals are needed.

And i want to see the internal working (to see whether signal is received by DSP).

i tried loggerSMDump.ou, but log contains only module creation and deletion, when

i need information about sync signal parsing.

http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/716/t/204898.aspx

0 Brijesh Jadav over 13 years ago in reply to richard lee2

TI__Guru**** 475325 points

Yes, it is possible, forget about the scalar

Thanks,

Brijesh Jadav

0 richard lee2 over 13 years ago in reply to Brijesh Jadav

Intellectual 490 points

I am not sure about what you said possibility.

capturing 8 bit data through VIP (direct to 8148, without TVP) with 3 clock signal (HSYNC, VSYNC, CLK) possible ?

is it possible to use this signal without field id, de (actvid) signal ?

surely i want to use omx

Best regards,

richard lee.

0 Brijesh Jadav over 13 years ago in reply to richard lee2

TI__Guru**** 475325 points

Yes, it is possible from VIP point of View. I am not sure how to do it in OMX. Please contact your local TI representative for OMX details.

Thanks,

Brijesh Jadav

0 Brijesh Jadav over 13 years ago in reply to Brijesh Jadav

TI__Guru**** 475325 points

Hi,

It looks like these controls are available in the OMX, so it is not possible to configure VIP to just use hs/vs/clk. Can you use V4L2 capture to configure VIP for this discrete sync capture mode?

Thanks,

Brijesh Jadav

0 richard lee2 over 13 years ago in reply to Brijesh Jadav

Intellectual 490 points

Please make sure that your mention is correct. Because switching from Omx to v4l2 take another

few days. If there is no possibility of doing that in omx, i will start v4l2.

But there are guys succeeded in discrete sync capturing in 8168.

(http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/717/t/109357.aspx)

And because 8148, 8168 is similar, i think there will be similar procedure in 8148.

Please reply assuming

1. only published code is available (no other codes opened under NDA)

2. field id and DE pin can be supplied with ground or Vcc.

If v4l2 is only option left, what must do i to encode captured image. Because

we cannot use omx encode component, there must be some replacement for that.

Should i use ffmpeg for that ? It will be extremely slow on a8.

thanks

richard lee

0 Brijesh Jadav over 13 years ago in reply to richard lee2

TI__Guru**** 475325 points

Hi Richard,

Which silicon are you using? is it 8168 or 8148? Which is the silicon revision?

As far as i know, OMX does not support this feature, if people have modified the OMX code and implemented this feature, you can take that code. But from the released code, it is not supported.

Thanks,

Brijesh Jadav

0 richard lee2 over 13 years ago in reply to Brijesh Jadav

Intellectual 490 points

Thanks for reply.

I am using 8148 and trying to capture bt.601 camera. i have no tvp chip and this camera is

directly connected to silicon pins. (d0~7, hsync, vsync, clk)

silicon # : X8148X3874BCYE19ZEGL9 (662 CYE)

ezsdk version : ti-ezsdk_dm814x-evm_5_04_00_11

What do you mean by omx not supporting this feature ? Is it about discrete sync ? omx only supports

embedded sync ?

When discrete sync is supported, then what is the problem with this application ? Because i don't

have tvp7002 i removed all code related to TVP from capture_encode demo. I want to make silicon

not knowing about TVP, it just get signal from VIN0_D0~D7, VIN0_CLK0, VIN0_HSYNC, VIN0_VSYNC.

If field id or de signal is required, then i will inject virtual signal to those pins.

best regards,

richard lee

0 Brijesh Jadav over 13 years ago in reply to richard lee2

TI__Guru**** 475325 points

Hi,

When i said it is not supported in omx, i meant configuration of different mode of discrete sync. If omx support discrete sync capture, it assumes input signal has de. but if you want to use hs/vs signals, we need to configure video port differnetly, which is not supported by omx.

Thanks,

Brijesh Jadav

0 richard lee2 over 13 years ago in reply to Brijesh Jadav

Intellectual 490 points

Thanks.

what assumption about DE ? because i cannot find any signal definition in your documents

please let me know.

Because 8148 has no errata about actvid this DE will be independent signal not like 8168

which requires all signal to include actvid.

When de must rise and at what condition it be fall ?If you have any public document available

relating this, let me know. I cannot find information in your silicon reference pdf.

thanks in advance.

richard lee

0 Brijesh Jadav over 13 years ago in reply to richard lee2

TI__Guru**** 475325 points

Hi,

As far as i know, OMX assumes that DE input signal is available and configures the port accordingly. and again, it does not expose anything to configure port for hs/vs style of capture which is why i was saying it does not support.

From the VIP port point of view, it does not limit, we can use hs/vs inpu signal and get capture work correctly.

Can you please let me know which silicon you are using? What is the silicon revision?

Thanks,

Brijesh Jadav

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Is capture with discrete sync possible through OMX?