[FFmpeg-devel] Added require fallback for libmfx in the case that pkg-config cannot find libmfx

[Ricardo Constantino]

On 15 April 2017 at 02:51, Aaron Levinson <alevinsn at aracnet.com> wrote:

> From e0c73c054add0137901d0bf7a7893e42e7e566c8 Mon Sep 17 00:00:00 2001
> From: Aaron Levinson <alevinsn at aracnet.com>
> Date: Fri, 14 Apr 2017 18:38:37 -0700
> Subject: [PATCH] Added require fallback for libmfx in the case that
>  pkg-config cannot find libmfx
>
> Purpose: Added require fallback for libmfx in the case that pkg-config
> cannot find libmfx.  On Linux, most people likely get libmfx via
> https://github.com/lu-zero/mfx_dispatch , but on Windows, the most
> well-known way to get libmfx is via the Intel Media SDK, which
> provides a static build of libmfx.lib and also provides the source
> code for building libmfx yourself.  If built this way, there are no
> pkg-config files to be found.  The changes utilize a similar approach
> to that already done for libx264 in configure.
>
> Comments:
>
> -- configure: Altered enabled libmfx step to use use_pkg_config()
>    instead of require_pkg_config(), and, if use_pkg_config() fails, it
>    falls back to require().  Note that the reason that require() is
>    passed -llibmfx as the last argument, instead of -lmfx, is the file
>    name for the library produced from the Intel Media SDK starts with
>    "libmfx".  Apparently, the filename for the library produced via
>    https://github.com/lu-zero/mfx_dispatch starts with "mfx".
> ---
>  configure | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/configure b/configure
> index 3bea057..b20a0b4 100755
> --- a/configure
> +++ b/configure
> @@ -5819,7 +5819,8 @@ enabled libgsm            && { for gsm_hdr in
> "gsm.h" "gsm/gsm.h"; do
>                                 done || die "ERROR: libgsm not found"; }
>  enabled libilbc           && require libilbc ilbc.h
> WebRtcIlbcfix_InitDecode -lilbc
>  enabled libkvazaar        && require_pkg_config "kvazaar >= 0.8.1"
> kvazaar.h kvz_api_get
> -enabled libmfx            && require_pkg_config libmfx "mfx/mfxvideo.h"
> MFXInit
> +enabled libmfx            && { use_pkg_config libmfx "mfx/mfxvideo.h"
> MFXInit ||
> +                               { require libmfx "mfx/mfxvideo.h" MFXInit
> -llibmfx && warn "using libmfx without pkg-config"; } }
>
Needs a '|| die "ERROR: libmfx not found";' before the last curly bracket
or it won't complain about not finding libmfx if enabled.


>  enabled libmodplug        && require_pkg_config libmodplug
> libmodplug/modplug.h ModPlug_Load
>  enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h
> lame_set_VBR_quality -lmp3lame
>  enabled libnut            && require libnut libnut.h nut_demuxer_init
> -lnut
> --
> 2.10.1.windows.1
>
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