I am not sure about PAL or NTSC. BUT IMO hardware resizer should not be
dependent on PAL/NTSC.
Ofcourse I have looked at the demo code but I have developed the logic as
explained in the app note SPRAAI7 "Understanding the DaVinci Resizer" to
program the resizer driver.
My video quality is perfect except the missing chroma.
regards/Amaresh
"Cochrane, Euan"
<[EMAIL PROTECTED]
.thalesgroup.com> To
"'Amaresh Ram'"
10/23/2007 01:51 <[EMAIL PROTECTED]>
PM cc
"'[EMAIL PROTECTED]
avincidsp.com'"
<[EMAIL PROTECTED]
vincidsp.com>
Subject
RE: Video Resizer
Hi, I am also having trouble with the resizer. I am trying to run the demo
applications provided by Texas Instruments with app note SPRAAI7
"Understanding the DaVinci Resizer", but the output on my display is
heavily distorted (distorted is probably not the best word but its hard to
describe the output). I was wondering if I might have missed something
obvious in the setup? I used a fresh install of DVEVM/DVSDK v1.20 rebuilt
the kernel to include the resizer module (built in), copied the demo files
to the /opt/dvevm directory, loadmodules and then run from the target. I am
booting via TFTP and using an NFS file system but I'm not sure if that is
relevant.
With regards to your problem, are you using the PAL or NTSC kit? I have
been informed by TI that the demos for the resizer were only built for
NTSC, so if you used the demos as your starting point that could be the
problem.
Thanks,
Euan C
-----Original Message-----
From: Amaresh Ram [mailto:[EMAIL PROTECTED]
Sent: 23 October 2007 09:06
To: David Lo
Cc: [email protected]
Subject: RE: Video Resizer
Hi David,
picture is in UYVY format only (and rendered perfectly without using
resizer). I tried with RSZ_PIX_FMT_YUYV too but the result is same.
regards/Amaresh
"David Lo"
<[EMAIL PROTECTED]
hinet.net> To
"'Amaresh Ram'"
10/23/2007 01:22 <[EMAIL PROTECTED]>,
PM <[EMAIL PROTECTED]
vincidsp.com>
cc
Subject
RE: Video Resizer
Hi Amaresh,
I think your pixel format is in wrong order
Try to change pix_fmt param to RSZ_PIX_FMT_YUYV
Regards,
David
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf
Of
Amaresh Ram
Sent: Tuesday, October 23, 2007 3:03 PM
To: [email protected]
Subject: Video Resizer
Importance: High
Hi Experts,
I am using the hardware video resizer of the DM6446 to resize 352x288 pixel
UYVY video to 720x480 pixel UYVY video. I have configured the resizer
driver according to the resize parameters returned by the tool calccoef.
Video resizing is done perfectly but video-chroma is lost during the
resize. can someone explain me the reason and help me to resolve the issue.
Configuration parameter for the resizer is as follows (generated by
calccoef):
/* horizontal filter type = BICUBIC */
/* hrsz = 123 */
/* vertical filter type = BICUBIC */
/* vrsz = 151 */
static rsz_params_t resizer_params = {
352, /* in_hsize */
288, /* in_vsize */
704, /* in_pitch */
RSZ_INTYPE_YCBCR422_16BIT, /* inptyp */
0, /* vert_starting_pixel */
0, /* horz_starting_pixel */
1, /* cbilin */
RSZ_PIX_FMT_UYVY, /* pix_fmt */
720, /* out_hsize */
480, /* out_vsize */
1440, /* out_pitch */
0, /* hstph */
0, /* vstph */
/*horizontal resizing filter coefficients: */
{
0,
256,
0,
0,
-11,
245,
23,
-1,
-17,
220,
58,
-5,
-18,
184,
100,
-10,
-15,
143,
143,
-15,
-10,
100,
184,
-18,
-5,
58,
220,
-17,
-1,
23,
245,
-11,
},
/*vertical resizing filter coefficients: */
{
0,
256,
0,
0,
-11,
245,
23,
-1,
-17,
220,
58,
-5,
-18,
184,
100,
-10,
-15,
143,
143,
-15,
-10,
100,
184,
-18,
-5,
58,
220,
-17,
-1,
23,
245,
-11,
},
{
RSZ_YENH_DISABLE,
}
};
regards/Amaresh
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