When writing this I used this page to figure the bytes' ordering :
https://docs.microsoft.com/en-us/windows/desktop/medfound/recommended-8-bit-yuv-formats-for-video-rendering#ayuv
Of course endianess confuses everything :(
sunxi seems to support AYUV & VUYA :
https://github.com/allwinner-zh/linux-3.4-sunxi/blob/master/include/video/sunxi_display2.h#L40
Finally this patch (and its gstreamer comments) confuses me even more :
https://patchwork.freedesktop.org/patch/255529/
I really don't know what's right or wrong here...
-
Lionel
On 15/01/2019 00:49, Vivek Kasireddy wrote:
From: "Kasireddy, Vivek" <[email protected]>
The channel ordering should be 1230 instead of 2103.
While displaying the packed YUV buffers generated by the Vivid (Virtual
Video) driver on Weston, it was observed that AYUV images were not
displayed correctly. Changing the ordering to 1230 makes AYUV buffers
display as expected.
CC: Lionel Landwerlin <[email protected]>
CC: Tapani Palli <[email protected]>
Signed-off-by: Vivek Kasireddy <[email protected]>
---
src/compiler/nir/nir_lower_tex.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/src/compiler/nir/nir_lower_tex.c b/src/compiler/nir/nir_lower_tex.c
index a618b86b34c..7058c54f17c 100644
--- a/src/compiler/nir/nir_lower_tex.c
+++ b/src/compiler/nir/nir_lower_tex.c
@@ -434,10 +434,10 @@ lower_ayuv_external(nir_builder *b, nir_tex_instr *tex)
nir_ssa_def *ayuv = sample_plane(b, tex, 0);
convert_yuv_to_rgb(b, tex,
- nir_channel(b, ayuv, 2),
nir_channel(b, ayuv, 1),
- nir_channel(b, ayuv, 0),
- nir_channel(b, ayuv, 3));
+ nir_channel(b, ayuv, 2),
+ nir_channel(b, ayuv, 3),
+ nir_channel(b, ayuv, 0));
}
/*
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