commit cd8675b0648a5565b09641b746368b36619cf444
author Jonas Larsson <ljonas@google.com> Wed Feb 06 16:51:59 2019 -0800
committer Alex Van Damme <atv@google.com> Mon Jun 17 14:03:38 2019 -0700
tree d95b600e20194372c8840150c6a2b4398132d7d4
parent 790c71d14e3edb44963ba8ed3281dbb77f36259f

Disable all libv4l2 emulated formats with V4L2_DISABLE_CONVERSION.

We get several emulated formats enumerated as supported, e.g. RGB,
from libv4l2. These are too inefficient to use in any real world
use case vs. using videoconvert on the CPU with ORC, or glfilterbin
on the GPU. With this change only the natively supported formats
will be enumerated, same as:
v4l2-ctl --list-formats-ext

Change-Id: If56c9f2f7be122e42f7a9729d60450eb8a127fb8

sys/v4l2/v4l2_calls.c

diff --git a/sys/v4l2/v4l2_calls.c b/sys/v4l2/v4l2_calls.c
index 9231974..2fb357b 100644
--- a/sys/v4l2/v4l2_calls.c
+++ b/sys/v4l2/v4l2_calls.c
@@ -583,7 +583,7 @@
 #ifdef HAVE_LIBV4L2
   if (v4l2object->fd_open)
     libv4l2_fd = v4l2object->fd_open (v4l2object->video_fd,
-        V4L2_ENABLE_ENUM_FMT_EMULATION);
+        V4L2_DISABLE_CONVERSION);
 #endif
 
   /* Note the v4l2_xxx functions are designed so that if they get passed an