Is that feasible to dump the output of a NullSrc Link into a File?

Haoran Li1

Hi,

I am now using EVM8168 with DVRRDK 4.0. I wonder if I could instantiate such a Link:

NullSrcLink -> ipcFramesOutLinkRTOS -> ipcFramesInLinkHLOS -> File

Actually, I want to generate such a link to test the valibility of my write cbfxn and the NullSrcLink. Successfully build my usecase, however, the M3VPSS core hang once I tried to run my usecase:

....

36: SYSTEM: ListElem Shared Addr = 0x4070cc80
37: SYSTEM: Creating ListMP [HOST_IPC_OUT_20] in region 0 ...
39: SYSTEM: Creating ListMP [HOST_IPC_IN_20] in region 0 ...
40: SYSTEM: ListElem Shared Addr = 0x4074ff80
41: SYSTEM: Creating ListMP [HOST_IPC_OUT_21] in region 0 ...
43: SYSTEM: Creating ListMP [HOST_IPC_IN_21] in region 0 ...
45: SYSTEM: ListElem Shared Addr = 0x40793280
61: SYSTEM: System Common Init Done !!!
[m3vpss ] 9809: NULL_SRC: Create in progress !!!

[host] IpcFramesInLink_tskMain:Entered
[host] 107: IPC_FRAMES_IN   : Create in progress !!!

[host] 107: SYSTEM: Opening ListMP [VPSS-M3_IPC_OUT_0] ...
109: SYSTEM: Opening ListMP [VPSS-M3_IPC_IN_0] ...

[host] 112: IPC_FRAMES_IN   : Create Done !!!
[m3vpss ] 9822: NULL_SRC: Create Done !!!
[m3vpss ] 9822: IPC_OUT_M3   : Create in progress !!!
[m3vpss ] 9823: IPC_OUT_M3   : Create Done !!!
[m3vpss ] 9828: NULL_SRC: Start Done !!!
[m3vpss ] 9888: NOTIFY: Send Event to [HOST][22] failed !!! (status = -14)
[m3vpss ] 9888: Assertion @ Line: 69 in links_common/system/system_ipc_notify.c: status == Notify_S_SUCCESS : failed !!!
Segmentation fault
....

Could you give me a hand and provide me with some tips?

Naroah

Jan/17/2014

over 11 years ago

0 Badri Narayanan over 11 years ago

TI__Guru 59700 points

The assert on m3vpss is becauase your a8 application segfaulted. you have to check your application code for invalid memory access. The buffer received from ipcFramesInHost will have physical address populated. You have to mmap the physical address before trying to access the buffer on A8,

0 Haoran Li1 over 11 years ago in reply to Badri Narayanan

Expert 1850 points

Hi Badri,

Thank you for your reply. I have double checked my link configuration; and it's indeed my typo. Now, I have the bug fixed and the callback fxn for writing file is available.

Setting the NullSrcLink with timeperiod = 30, YUV420SP_UV, 1280x720p, I think the ipcFrameOutLinkRTOS would properly deal with the VIDFrame
However, I still do not know how to write the YUV data into file, since the VIDFrame Structure is confusing.

Employing my callback fxn, I want to write the YUV420SP_UV, 1280x720p Raw data into file. I have checked the API Guide. I think the YUV data can be fetch by using the Ptr addr[VIDFRAME_MAX_FIELDS][VIDFRAME_MAX_PLANES]. But I don't know how the Y, UV data locate in these buffers. And the startX and startY are also confusing.

Could you please tell me how my 1280x720p YUV420SP_UV data are arranged in this buffer?

I am sincerely looking forward to your reply.

Naroah

Jan/17/2014

0 Badri Narayanan over 11 years ago in reply to Haoran Li1

TI__Guru 59700 points

Refer this post which copies YUV420SP frames from ipcFramesOutLink on A8

http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/717/p/291937/1020114.aspx#1020114

0 Haoran Li1 over 11 years ago in reply to Badri Narayanan

Expert 1850 points

Hi Badri,

Thank you for your reply!

Sorry for my late reply. Acturally, I am on my vacation, and I cannot verify the thread which you referred. Once I come back, I'd like to try it as soon as possible.

Naroah

Jan/20/2014

Processors

Processors forum

Is that feasible to dump the output of a NullSrc Link into a File?