Bug 96434

Summary:	VA_FILTER_SCALING_HQ downscaling from 4096x2160 to 176x144 only has a part of the source image
Product:	libva	Reporter:	joojler <jun.tang>
Component:	intel	Assignee:	ykzhao <yakui.zhao>
Status:	NEEDINFO ---	QA Contact:	Sean V Kelley <seanvk>
Severity:	major
Priority:	medium
Version:	unspecified
Hardware:	x86-64 (AMD64)
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:
Attachments:	YUV data before and after scaling attachment-2938-0.html

Description joojler 2016-06-08 05:19:33 UTC

Created attachment 124398 [details]
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

Comment 1 joojler 2016-12-14 01:31:52 UTC

Created attachment 128457 [details]
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

Comment 2 ykzhao 2016-12-15 04:43:52 UTC

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

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