[FFmpeg-devel] [PATCH] libx264: Set min build version to 158

[Matt Oliver]

From: Matt Oliver <protogonoi at gmail.com>

Was "[PATCH] libx264: Do not explicitly set X264_API_IMPORTS"

Setting X264_API_IMPORTS only affects msvc builds and it breaks
linking to static builds (although is required for shared builds).
This flag is set by x264 in its pkgconfig as required since build
158 (a615f027ed172e2dd5380e736d487aa858a0c4ff) from July 2019.
So this patch updates configure to require a newer x264 build that
correctly sets the imports flag.

Alternatively we can detect the x264 build version in configure
and keep the fallback of manually setting the flag on older x264
builds that arent using pkgconfig (to keep the old behaviour) but
that requires some complex configure changes.

Submitted-by: softworkz <softworkz at hotmail.com>
Signed-off-by: Matt Oliver <protogonoi at gmail.com>
---
    libx264: Set min build version to 158
    
    I'm submitting this patch on behalf of Matt with his permission.
    
    There seemed to be agreement that the 158 version limit should be
    applied to MSVC builds only. For the latter I'd need some help, because
    I can't test this and I'm not familiar enough with the configure script
    logic to make a change with sufficient confidence.
    
    Thanks, softworkz

Published-As: https://github.com/ffstaging/FFmpeg/releases/tag/pr-ffstaging-30%2Fsoftworkz%2Fsubmit_x264_api_imports_matt-v1
Fetch-It-Via: git fetch https://github.com/ffstaging/FFmpeg pr-ffstaging-30/softworkz/submit_x264_api_imports_matt-v1
Pull-Request: https://github.com/ffstaging/FFmpeg/pull/30

 configure            | 7 ++-----
 libavcodec/libx264.c | 4 ----
 2 files changed, 2 insertions(+), 9 deletions(-)

diff --git a/configure b/configure
index f115b21064..d977a97397 100755
--- a/configure
+++ b/configure
@@ -6656,11 +6656,8 @@ enabled libvpx            && {
 enabled libwebp           && {
     enabled libwebp_encoder      && require_pkg_config libwebp "libwebp >= 0.2.0" webp/encode.h WebPGetEncoderVersion
     enabled libwebp_anim_encoder && check_pkg_config libwebp_anim_encoder "libwebpmux >= 0.4.0" webp/mux.h WebPAnimEncoderOptionsInit; }
-enabled libx264           && { check_pkg_config libx264 x264 "stdint.h x264.h" x264_encoder_encode ||
-                               { require libx264 "stdint.h x264.h" x264_encoder_encode "-lx264 $pthreads_extralibs $libm_extralibs" &&
-                                 warn "using libx264 without pkg-config"; } } &&
-                             require_cpp_condition libx264 x264.h "X264_BUILD >= 118" &&
-                             check_cpp_condition libx262 x264.h "X264_MPEG2"
+enabled libx264           && check_pkg_config libx264 x264 "stdint.h x264.h" x264_encoder_encode &&
+                             require_cpp_condition libx264 x264.h "X264_BUILD >= 158"
 enabled libx265           && require_pkg_config libx265 x265 x265.h x265_api_get &&
                              require_cpp_condition libx265 x265.h "X265_BUILD >= 70"
 enabled libxavs           && require libxavs "stdint.h xavs.h" xavs_encoder_encode "-lxavs $pthreads_extralibs $libm_extralibs"
diff --git a/libavcodec/libx264.c b/libavcodec/libx264.c
index 4ce3791ae8..14177b3016 100644
--- a/libavcodec/libx264.c
+++ b/libavcodec/libx264.c
@@ -37,10 +37,6 @@
 #include "atsc_a53.h"
 #include "sei.h"
 
-#if defined(_MSC_VER)
-#define X264_API_IMPORTS 1
-#endif
-
 #include <x264.h>
 #include <float.h>
 #include <math.h>

base-commit: 41a558fea06cc0a23b8d2d0dfb03ef6a25cf5100
-- 
ffmpeg-codebot