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gstreamer1.0-plugins-good: fix 4k playback for v4l2 decoder

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Backport a fix already merged upstream in master and 1.12 branch, it fixes 4K video
playback on any platform that uses v4l2 codecs, such as Dragonboard 820c.

(From OE-Core rev: b662944b28080dfb68833d4a81655262b04ada67)

Signed-off-by: Nicolas Dechesne <nicolas.dechesne@linaro.org>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Nicolas Dechesne
2017-09-04 10:23:34 +02:00
committed by Richard Purdie
parent fc44a75e0d
commit 04f49ae884
2 changed files with 49 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
meta/recipes-multimedia/gstreamer/gstreamer1.0-plugins-good/0001-v4l2-Fix-4K-colorimetry.patch
+48
View File
@@ -0,0 +1,48 @@
From 545646cccba243236e10362fe7325f89be57da1f Mon Sep 17 00:00:00 2001
From: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Date: Tue, 18 Jul 2017 11:28:37 -0400
Subject: [PATCH] v4l2: Fix 4K colorimetry
Since 1.6, the transfer function for BT2020 has been changed from BT709
to BT2020_12. It's the same function, but with more precision. As a side
effect, the V4L2 colorpsace didn't match GStreamer colorspace. When
GStreamer ended up making a guess, it would not match anything supported
by V4L2 anymore. This this by using BT2020_12 for BT2020 colorspace and
BT2020 transfer function in replacement of BT709 whenever a 4K
resolution is detected.
Upstream-Status: Backport
Signed-off-by: Nicolas Dechesne <nicolas.dechesne@linaro.org>
---
sys/v4l2/gstv4l2object.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/sys/v4l2/gstv4l2object.c b/sys/v4l2/gstv4l2object.c
index 61244455f..aae2c55e7 100644
--- a/sys/v4l2/gstv4l2object.c
+++ b/sys/v4l2/gstv4l2object.c
@@ -1960,7 +1960,7 @@ gst_v4l2_object_get_colorspace (struct v4l2_format *fmt,
case V4L2_COLORSPACE_BT2020:
cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT2020;
- cinfo->transfer = GST_VIDEO_TRANSFER_BT709;
+ cinfo->transfer = GST_VIDEO_TRANSFER_BT2020_12;
cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_BT2020;
break;
case V4L2_COLORSPACE_SMPTE240M:
@@ -2062,7 +2062,10 @@ gst_v4l2_object_get_colorspace (struct v4l2_format *fmt,
switch (transfer) {
case V4L2_XFER_FUNC_709:
- cinfo->transfer = GST_VIDEO_TRANSFER_BT709;
+ if (fmt->fmt.pix.height > 2160)
+ cinfo->transfer = GST_VIDEO_TRANSFER_BT2020_12;
+ else
+ cinfo->transfer = GST_VIDEO_TRANSFER_BT709;
break;
case V4L2_XFER_FUNC_SRGB:
cinfo->transfer = GST_VIDEO_TRANSFER_SRGB;
--
2.14.1
meta/recipes-multimedia/gstreamer/gstreamer1.0-plugins-good_1.12.2.bb
+1
View File
@@ -10,6 +10,7 @@ SRC_URI = " \
file://avoid-including-sys-poll.h-directly.patch \
file://ensure-valid-sentinel-for-gst_structure_get.patch \
file://0001-introspection.m4-prefix-pkgconfig-paths-with-PKG_CON.patch \
file://0001-v4l2-Fix-4K-colorimetry.patch \
"
SRC_URI[md5sum] = "20254217d9805484532e08ff1c3aa296"
SRC_URI[sha256sum] = "5591ee7208ab30289a30658a82b76bf87169c927572d9b794f3a41ed48e1ee96"