VA_FILTER_SCALING_HQ downscaling from 4096x2160 to 176x144 only has a part of the source image

[seanvk]

migrated from Bugzilla #96434
status NEEDINFO severity major in component intel for ---
Reported in version unspecified on platform x86-64 (AMD64)
Assigned to: ykzhao

Original attachment names and IDs:

• 缩æÂ�¾åÂ�Â�Ã¥Â�Â�çÂ�Â�Ã¥Â�¾åÂ�Â�.rar (ID 124398)
• attachment-2938-0.html (ID 128457)

On 2016-06-08 05:19:33 +0000, joojler wrote:

Created attachment 124398
YUV data before and after scaling

libva: 0.39
intel-driver: 1.6.2

VA_FILTER_SCALING_HQ NV12 downscaling from 4096x2160 to 176x144 only has a part of the source image. Looks like AVS scaling has some limitation for larger ratio.

Reproduce on both Braswell N3150 and Skylake Core i5-6600 with libyami VPP test application. Please refer to the attached YUV file before and after scaling to get exact phenomenon.

Steps:
$ git config --global http.sslverify false
$ git clone https://github.com/01org/libyami
$ ./autogen.sh --prefix=/usr �enable-avformat=yes --enable-tests=yes --enable-debu=yes --enable-dmabuf=yes
$ cd tests
$ ./yamivpp 4096x2160_NV12.nv12 output_176x144.nv12

On 2016-12-14 01:31:52 +0000, joojler wrote:

Created attachment 128457
attachment-2938-0.html

Thanks for your mail. I'm in business travel from ww51.1~ww51.4. Email response will be slow, please call me for urgent issues. 18500233196

On 2016-12-15 04:43:52 +0000, ykzhao wrote:

Hi, Jooler
Will you please try the latest driver code and see whether it works for you?
The driver adds the new implementation for NV12 scaling.

Thanks