Hello,
I've just received a review sample thermal camera which doesn't work
with Linux uvcvideo. It's reporting itself as providing a D3DFMT GUID:
---snip---
VideoStreaming Interface Descriptor:
bLength 27
bDescriptorType 36
bDescriptorSubtype 4 (FORMAT_UNCOMPRESSED)
bFormatIndex 1
bNumFrameDescriptors 1
guidFormat
{e436eb7b-524f-11ce-9f53-0020af0ba770}
bBitsPerPixel 16
bDefaultFrameIndex 1
bAspectRatioX 0
bAspectRatioY 0
bmInterlaceFlags 0x00
Interlaced stream or variable: No
Fields per frame: 2 fields
Field 1 first: No
Field pattern: Field 1 only
bCopyProtect 0
---snip---
This corresponds to D3DFMT_R5G6B5 or MEDIASUBTYPE_RGB565, based on the
reference here: https://gix.github.io/media-types/#ID0EC2AI However,
the UVC driver is expecting RGB565 to be using the 4cc RGBP GUID
52474250-0000-1000-8000-00aa00389b71. This is very nearly the same as
the alternative GUID described on the document above,
00000017-0000-0010-8000-00AA00389B71, which uses an index rather than
a 4cc.
I haven't been able to find any references as to what GUIDs are
supported for guidFormat.
(a) Is the camera wrong?
(b) Is the kernel wrong?
(c) Am I looking at the wrong document?
The easy fix is to patch the uvcvideo driver to support the e436...
GUID, but that doesn't seem a great idea. Any suggestions?
