[FFmpeg-cvslog] fftools/ffmpeg_opt: Document VAAPI -device usage for DirectX Adapter

[Sil Vilerino]

ffmpeg | branch: master | Sil Vilerino <sivileri at microsoft.com> | Fri Apr 14 10:39:05 2023 -0400| [5ff14304524f508c429eac8322f0d70458ecd04c] | committer: Haihao Xiang

fftools/ffmpeg_opt: Document VAAPI -device usage for DirectX Adapter

Initial review at https://github.com/intel-media-ci/ffmpeg/pull/619/

Signed-off-by: Sil Vilerino <sivileri at microsoft.com>
Reviewed-by: Dmitry Rogozhkin <dmitry.v.rogozhkin at intel.com>
Reviewed-by: Wu, Tong1 <tong1.wu at intel.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=5ff14304524f508c429eac8322f0d70458ecd04c
---

 doc/ffmpeg.texi      | 5 +++--
 fftools/ffmpeg_opt.c | 2 +-
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/doc/ffmpeg.texi b/doc/ffmpeg.texi
index cb8aa13df2..34c413355e 100644
--- a/doc/ffmpeg.texi
+++ b/doc/ffmpeg.texi
@@ -1169,9 +1169,10 @@ Choose the first device and use the primary device context.
 @var{device} is the number of the Direct3D 11 display adapter.
 
 @item vaapi
- at var{device} is either an X11 display name or a DRM render node.
+ at var{device} is either an X11 display name, a DRM render node or a DirectX adapter index.
 If not specified, it will attempt to open the default X11 display (@emph{$DISPLAY})
-and then the first DRM render node (@emph{/dev/dri/renderD128}).
+and then the first DRM render node (@emph{/dev/dri/renderD128}), or the default
+DirectX adapter on Windows.
 
 @item vdpau
 @var{device} is an X11 display name.
diff --git a/fftools/ffmpeg_opt.c b/fftools/ffmpeg_opt.c
index aa9aa0e9b4..f811d38b9c 100644
--- a/fftools/ffmpeg_opt.c
+++ b/fftools/ffmpeg_opt.c
@@ -1767,7 +1767,7 @@ const OptionDef options[] = {
 
 #if CONFIG_VAAPI
     { "vaapi_device", HAS_ARG | OPT_EXPERT, { .func_arg = opt_vaapi_device },
-        "set VAAPI hardware device (DRM path or X11 display name)", "device" },
+        "set VAAPI hardware device (DirectX adapter index, DRM path or X11 display name)", "device" },
 #endif
 
 #if CONFIG_QSV