DM365 Resizer 32 bytes align problem

Xiaoguang Zhao

Intellectual 255 points

Hi All,

When I use the decode a D1 video on dm365, the output buffer info is as follows:

srcbuf ptr: 441bf000, srcdim linelength: 768, x: 24, y: 48, w:720, h:480 (YUV420SP)

I want to resize it to 1280x800.

dstbuf ptr: 45f24000 , dstdim linelength: 1280, x: 0, y: 0, w:1280, h:800

The YUV420SP format requires to run the resizer twice, so I resize the Y first.

srcOffset = srcDim.y * srcDim.lineLength + (srcDim.x << 0);

dstOffset = dstDim.y * dstDim.lineLength + (dstDim.x << 0);

   rsz.in_buff.index    = -1;
   rsz.in_buff.buf_type = IMP_BUF_IN;
   rsz.in_buff.offset    = (UInt32) Buffer_getUserPtr(hSrcBuf) + srcOffset;
   rsz.in_buff.size    = srcDim.width * srcDim.height;

   rsz.out_buff1.index = -1;
   rsz.out_buff1.buf_type = IMP_BUF_OUT1;
   rsz.out_buff1.offset = (UInt32) Buffer_getUserPtr(hDstBuf) + dstOffset;
   rsz.out_buff1.size = dstDim.width * dstDim.height;

the final rsz.in_buff.offset = 441C8018 , but

assert((rsz.in_buff.offset & 0x1F) == 0);
assert((rsz.out_buff1.offset & 0x1F) == 0);

so the assert will failed.

The problem is that the srcDim.x srcDim.y is decided by the decoder's output, I can not change it .

So how can I make the rsz.in_buff.offset to meet the address alignment requirements?

Thank you.

Xiaoguang Zhao

over 13 years ago

0 Nagabhushana over 13 years ago

TI__Expert 4685 points

This application you are referring to is a application from SDK? OR your own application?

0 Xiaoguang Zhao over 13 years ago in reply to Nagabhushana

Intellectual 255 points

8203.Resize_doYUV420SP.zipHi Nagabhushana ,

I use the DM368 DVSDK4.02. I use the gstreamer and ti's gstreamer dmai plugin to play an D1 (h264) video.

Because my own board ouput a 1280x800 resolution, the TIDmaiVideoSink will display the video in the center of screen as default.

I want to resize the video to a full screen display, so I set the resizer=true for TIDmaiVideoSink. But the kernel will give an error , says the IPIPE_YUV420SP is not an valid input.

I think the dmai doesn't support YUV420SP resize in the single shot mode.

In http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/100/p/7583/29899.aspx#29899, Anshuman Saxena gives an example shows how to use the resizer to resize a

YUV420SP input in single shot mode.

So, I add an function called Resize_doYUV420SP() in DMAI , I upload it in the attach.

Can you help me to check it if it has some errors?

thank you.

Xiaoguang Zhao

0 Nagabhushana over 13 years ago in reply to Xiaoguang Zhao

TI__Expert 4685 points

Buffer_getUserPtr(hSrcBuf) is 32 bytes aligned?

0 Tsutomu Hiroi over 13 years ago in reply to Xiaoguang Zhao

Prodigy 30 points

I want to resize it from 640x360 to 1280x720.

I am using 8203.Resize_doYUV420SP.zip very thankfully.

In my environment, I will have noticed that the chromium picture after resizing shifts under one line.

I think that zero data of one line enters after Y_Data, and C_Data enters that.

Then, it corrected below from the original source code.

L195

rsz_ss_config.output1.height = dstDim.height + 1;

L225

rsz.out_buff1.offset = (UInt32) Buffer_getUserPtr(hDstBuf) + ydstOffset*2 +
　　　　　　　　　　　　　　　(dstDim.width * (dstDim.height-1));
rsz.out_buff1.size = dstDim.width * (dstDim.height+1) / 2;

It operates correctly now.
Would someone teach me a reason?

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DM365 Resizer 32 bytes align problem