Workaround for the v4l2convert segfault

rsvgoverlay has concurrency issue working with v4l2convert. Apply the
workaround to enable v4l2convert.

Bug: b/158161332

Change-Id: Ia52602731ffb21cc738145be21532c0b8326801e

debian/changelog

diff --git a/debian/changelog b/debian/changelog
index d464042..9edef94 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,11 @@
+gst-plugins-bad1.0 (1.14.4-1+mtku1) mendel-eagle; urgency=medium
+
+  * Enable waylandsink fullscreen.
+  * Enable v4l2convert and apply workaround to avoid concurrency issue with
+    rsvgoverlay.
+
+ -- Coral Team <coral-support@google.com>  Thu, 29 Oct 2020 22:33:42 -0700
+
 gst-plugins-bad1.0 (1.14.4-1+mtk) mendel-day; urgency=medium
 
   * Update to debian 1.14.4-1

debian/patches/0001-Workaround-concurrency-issue.patch

diff --git a/debian/patches/0001-Workaround-concurrency-issue.patch b/debian/patches/0001-Workaround-concurrency-issue.patch
new file mode 100644
index 0000000..c88c14f
--- /dev/null
+++ b/debian/patches/0001-Workaround-concurrency-issue.patch
@@ -0,0 +1,35 @@
+From 1a4da293d0d22015240c81e5b056ba322c1529ea Mon Sep 17 00:00:00 2001
+From: Alexandre Bailon <abailon@baylibre.com>
+Date: Tue, 22 Sep 2020 15:33:19 +0200
+Subject: [PATCH] Workaround concurrency issue
+
+There is a concurrency issue between rsvg plugin and it parent's
+class: videofilter.
+Because of this issue, the plugin crash because it tries to write
+a read only buffer.
+
+Until we find a proper way to prevent the concurrency, use this
+workaround to avoid the segfault.
+
+Signed-off-by: Alexandre Bailon <abailon@baylibre.com>
+Change-Id: I14f1c2a857fb949f53220f583615f6faa8e9ca26
+---
+ ext/rsvg/gstrsvgoverlay.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/ext/rsvg/gstrsvgoverlay.c b/ext/rsvg/gstrsvgoverlay.c
+index 5f661b9a..48384573 100644
+--- a/ext/rsvg/gstrsvgoverlay.c
++++ b/ext/rsvg/gstrsvgoverlay.c
+@@ -137,7 +137,7 @@ gst_rsvg_overlay_set_svg_data (GstRsvgOverlay * overlay, const gchar * data,
+   if (overlay->handle) {
+     g_object_unref (overlay->handle);
+     overlay->handle = NULL;
+-    gst_base_transform_set_passthrough (btrans, TRUE);
++//    gst_base_transform_set_passthrough (btrans, TRUE);
+   }
+ 
+   /* data may be NULL */
+-- 
+2.25.1
+

debian/patches/series

diff --git a/debian/patches/series b/debian/patches/series
index 1a14fcd..c6ce507 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -4,3 +4,4 @@
 0002-mtk-gst-libs-gst-wayland-makefile.patch
 0003-waylandsink-support-fullscreen.patch
 0004-openexr.patch
+0001-Workaround-concurrency-issue.patch