[Spice-devel] [PATCH 0/1] spice/gstreamer: Use h/w based encoders/decoders with Intel GPUs if possible

[Vivek Kasireddy]

This two patch series includes a patch for Spice (server) to
automatically select h/w based encoder elements and another one
for Spice-gtk (client) to automatically select h/w based decoder
elements with Intel GPUs when these two conditions are met:
- An Intel GPU is available and is active (driver loaded)
- The relevant h/w based encoder/decoder elements are registered
  (i.e, Intel Media SDK Gstreamer plugin (libgstmsdk.so) and associated
  libraries (such as vaapi) are properly installed).

When tested on a Gen 12 Intel GPU (codenamed AlderLake/TigerLake)
with Qemu/Spice + h/w encoder elements, we noticed that the time
to encode a 1920x1080 BGRx frame was reduced to ~2-3 ms compared
to ~12-16 ms with a s/w encoder (x264enc). Other advantages
include reduced overall CPU utilization.

However, once these patches are applied, the only way to force
Spice/Spice-gtk to fallback to s/w based encoder/decoder is to
remove the msdk and or vaapi plugins from GST_PLUGIN_PATH. This
might be desirable for debugging purposes or for other reasons.

Cc: Frediano Ziglio <freddy77 at gmail.com>
Cc: Gerd Hoffmann <kraxel at redhat.com>
Cc: Marc-André Lureau <marcandre.lureau at redhat.com>
Cc: Dongwon Kim <dongwon.kim at intel.com>
Cc: Mazlan, Hazwan Arif <hazwan.arif.mazlan at intel.com>
Cc: Teng, Jin Chung <jin.chung.teng at intel.com>

Vivek Kasireddy (1):
  channel-display-gst: Use h/w based decoders with Intel GPUs if
    possible

 meson.build               |   3 +
 src/channel-display-gst.c | 195 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 198 insertions(+)

-- 
2.39.2