[FFmpeg-devel] [PATCH v2 01/10] configure: ensure --enable-libmfx uses libmfx 1.x

[Haihao Xiang]

Intel's oneVPL is a successor to MediaSDK, but removed some obsolete
features of MediaSDK[1]. Some early versions of oneVPL still uses libmfx
as library name[2], however some of obsolete features, including OPAQUE
memory, multi-frame encode, user plugins and LA_EXT rate control mode
etc, have been enabled in QSV, so user can not use --enable-libmfx to
enable QSV if using an early version of oneVPL SDK. In order to make
sure user builds FFmpeg against a right version of libmfx, this patch
added a check for the version of libmfx and warning message about the
used obsolete features.

[1] https://spec.oneapi.io/versions/latest/elements/oneVPL/source/appendix/VPL_intel_media_sdk.html
[2] https://github.com/oneapi-src/oneVPL
---
 configure | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/configure b/configure
index af8a934af9..4bdb8bac18 100755
--- a/configure
+++ b/configure
@@ -6436,8 +6436,11 @@ enabled liblensfun        && require_pkg_config liblensfun lensfun lensfun.h lf_
 # Media SDK or Intel Media Server Studio, these don't come with
 # pkg-config support.  Instead, users should make sure that the build
 # can find the libraries and headers through other means.
-enabled libmfx            && { check_pkg_config libmfx libmfx "mfx/mfxvideo.h" MFXInit ||
-                               { require libmfx "mfx/mfxvideo.h" MFXInit "-llibmfx $advapi32_extralibs" && warn "using libmfx without pkg-config"; } }
+enabled libmfx            && { { check_pkg_config libmfx "libmfx < 2.0" "mfx/mfxvideo.h" MFXInit ||
+                                 { require "libmfx < 2.0" "mfx/mfxvideo.h" MFXInit "-llibmfx $advapi32_extralibs" && warn "using libmfx without pkg-config"; } } &&
+                               warn "build FFmpeg against libmfx 1.x, obsolete features of libmfx such as OPAQUE memory,\n"\
+                                    "multi-frame encode, user plugins and LA_EXT rate control mode are enabled"; }
+
 if enabled libmfx; then
    check_cc MFX_CODEC_VP9 "mfx/mfxvp9.h mfx/mfxstructures.h" "MFX_CODEC_VP9"
 fi
-- 
2.17.1