[FFmpeg-devel] configure: support static libnpp [v3]

Submitted by Andreas Håkon on June 2, 2017, 12:32 p.m.


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Andreas Håkon June 2, 2017, 12:32 p.m.

This is an updated version of my previous patch.
Sorry! The previous one doesn’t work with the last version of the configure.
This version is tested with both parameters: “--enable-libnpp-static” and “--disable-libnpp-static”.

To summarize the info about this patch:

- This is a simple solution to include libnpp*_static.a when compile FFmpeg.

- Even “non-free” is required, three advantages exists:

1) If you link libnpp* static (with this patch) you can upgrade the NVidia driver and the CUDA SDK without recompiling the FFmpeg. The main advantage is this.

2) If you link libnpp* static you can uninstall the CUDA SDK after compile the FFmpeg. It doesn't need the SDK to run. Then you can save (a lot of) space.

3) Even if you compile FFmpeg with "non-free" enabled, you can use the binary in any machine you own. You can't distribute the binary, but you can copy/use the binary. So, if you have a cluster of machines, you only need to copy the binary, install the NVidia driver, and... nothing more. The CUDA SDK is not a requirement for run FFmpeg, only to compile it.

- The trick is the dynamic loading of the library "libcuda.so.1" in the source code of the "dynalink_loader.h".

- By default the linking is the regular dynamic link (aka "--disable-libnpp-static" config). However, if you like to compile statically with "libnpp*_static.a" then add these parameters:

$ configure ... --enable-nonfree --enable-libnpp --enable-libnpp-static --enable-cuda --extra-cflags="-I/usr/local/cuda/include/" --extra-ldflags="-L/usr/local/cuda/lib64/"

This assumes the CUDA SDK is installed in "/usr/local/cuda".

- This patch is based on the original work done by Timo Rothenpieler, and his patch for static linking with libnpp:

- Read more about linking directly to libnpp* libraries without link to the CUDA SDK:


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From 01b521720c78fdc0f1e6fab0887def03d559b58c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andreas=20H=C3=A5kon?= <andreas.hakon@protonmail.com>
Date: Fri, 2 Jun 2017 13:19:26 +0100
Subject: [PATCH] configure: support static libnpp [v3]

 configure |   12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)


Timo Rothenpieler Sept. 18, 2017, 12:06 p.m.
I don't like the complexity of this.

It also seems strange to me that you put cudart_static and other culibos 
in there, as well as $ldl, stdc++ and so on.
That would most likely link against shared cuda and static cuda at the 
same time, which seems highly redundant.

Also, no other library uses an additional configure switch to use its 
static version. I'm against adding one for libnpp.

Besides, I consider scale_npp a candidate for deprecation, in favor of 
scale_cuda, so I'm not too thrilled about introducing new and complex 
stuff for it.
Andreas Håkon Sept. 22, 2017, 7:37 a.m.
Hi Timo,

As for the deprecation of libnpp, I suggest to keeping it. We use it a lot! In addition, we have some improvements for the current scale_npp... however, before publishing it it's necesssary to solve the question of the linking with libnpp.

Regarding the static linking with libnpp, I have already mentioned the reasons for this. And the main one is that in this way you don't have to recompile the binary when changing the video driver. Think of the problem of kernel modules and the graphic drivers as an example, when the kernel version is changed you have to recompile the driver. Wouldn't it be better not to do this? With this configuration (fully optional) you can achieve that with FFMpeg & nVidia drivers.

And as for linking or not with other libraries, it may be possible to improve the patch. What I've published is based on previous work you did yourself. Therefore, perhaps we can work together to improve that option. You agree?

In any case, I fully recommend adding the option (by default disabled) of statically linking with libnpp.


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diff --git a/configure b/configure
index 72060ef..8636be9 100755
--- a/configure
+++ b/configure
@@ -300,6 +300,7 @@  External library support:
   --disable-dxva2          disable Microsoft DirectX 9 video acceleration code [autodetect]
   --enable-libmfx          enable Intel MediaSDK (AKA Quick Sync Video) code via libmfx [no]
   --enable-libnpp          enable Nvidia Performance Primitives-based code [no]
+  --disable-libnpp-static  disable using static version of libnpp [autodetect]
   --enable-mmal            enable Broadcom Multi-Media Abstraction Layer (Raspberry Pi) via MMAL [no]
   --disable-nvenc          disable Nvidia video encoding code [autodetect]
   --enable-omx             enable OpenMAX IL code [no]
@@ -1599,6 +1600,7 @@  HWACCEL_AUTODETECT_LIBRARY_LIST="
+    libnpp_static
@@ -5816,7 +5818,15 @@  enabled libmfx            && { use_pkg_config libmfx "mfx/mfxvideo.h" MFXInit ||
                                { require libmfx "mfx/mfxvideo.h" MFXInit -llibmfx && warn "using libmfx without pkg-config"; } }
 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 libnpp            && require libnpp npp.h nppGetLibVersion -lnppi -lnppc
+enabled libnpp            && { { if ! disabled libnpp_static; then
+                                 check_lib libnpp npp.h nppGetLibVersion -lnppi_static -lnppc_static -lcudart_static -lculibos $ldl  ||
+                                 check_lib libnpp npp.h nppGetLibVersion -lnppi_static -lnppc_static -lcudart_static -lculibos $ldl -lstdc++ ||
+                                 check_lib libnpp npp.h nppGetLibVersion -lnppi_static -lnppc_static -lcudart_static -lculibos $ldl -lstdc++ -lrt
+                               else false; fi; } ||
+                               { if ! enabled libnpp_static; then
+                                 require libnpp npp.h nppGetLibVersion -lnppi -lnppc
+                               else false; fi; } ||
+                               die "ERROR: libnpp not found"; }
 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
 enabled libopencv         && { check_header opencv2/core/core_c.h &&