dsp link output buffer manager

Weiyi Jiang

Intellectual 290 points

hi,

I create a algorithm in dsp called helloworld. I set

helloworld.createOutBuf1=1 ;

helloworld.numBufPerCh=4;

to create the queue for output buffer and allocate the buffers.

Now i set the step

capture---->ipcFramsOutVpss----(process)---ipcFramesInDsp---helloworld

-----(nextlink)---display

when helloworld process the data buffers and push them to the output queue .

how does the output buffer work? who release the output buffer ?

Now my demo can display video for 3-5 seconds,but an error occurs:

[c6xdsp ] 17349: Assertion @ Line: 200 in utils/src/utils_bit_buf.c: status ==
FVID2_SOK : failed !!!

over 12 years ago

0 Badri Narayanan over 12 years ago

TI__Guru 59700 points

The DVR RDK dspAlgLink currently supports only BitStream_Buf output and not FVID2_Frame output. This is because SCD/DSP analytics needs to output meta data info and not video frame .In your case you require to output video frame data from SCD link. So you will have to do several changes to output video frame instead of bitBUf. You will have to refer to a link like nsfLink to understand how to create a FVID2 Frame output queue and how to allocate FVID2_Frames.

0 Weiyi Jiang over 12 years ago in reply to Badri Narayanan

Intellectual 290 points

thank you , i wil have a try

0 Weiyi Jiang over 12 years ago in reply to Badri Narayanan

Intellectual 290 points

hi , badri

my demo works well now . but anthor problem comes out .

the display video is darker than the orignal

.source image

display image

i dont'e do any process in helloworld link . why .....

0 Badri Narayanan over 12 years ago in reply to Weiyi Jiang

TI__Guru 59700 points

Is the only difference between original and other image is one passes thru hello world link and the other does not pass thru hello world link ? Or is the original image directly from capture connected to TV bypassing 816x ?

0 Weiyi Jiang over 12 years ago in reply to Badri Narayanan

Intellectual 290 points

the original image is directly from video player . it does't pass thr 8168.

0 Badri Narayanan over 12 years ago in reply to Weiyi Jiang

TI__Guru 59700 points

When passed thru 816x it undergoes a number of processing like A/D conversion, chroma format conversion etc which will alter the image.It is not the DSP link which is modifying the image.

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dsp link output buffer manager