[FFmpeg-devel] [PATCH v2] libx264: Set min build version to 158

[softworkz]

From: softworkz <softworkz at hotmail.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.

The requirement for 158 is applied for msvc builds only,
no change is made for all other cases.

Co-authored-by: softworkz <softworkz at hotmail.com>
Signed-off-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 was agreement that the >= 158 version requirement should be
    applied to MSVC builds only.
    
    v2: restrict the version requirement to msvc builds

Published-As: https://github.com/ffstaging/FFmpeg/releases/tag/pr-ffstaging-30%2Fsoftworkz%2Fsubmit_x264_api_imports_matt-v2
Fetch-It-Via: git fetch https://github.com/ffstaging/FFmpeg pr-ffstaging-30/softworkz/submit_x264_api_imports_matt-v2
Pull-Request: https://github.com/ffstaging/FFmpeg/pull/30

Range-diff vs v1:

 1:  bbe97f5e1b ! 1:  1696684de3 libx264: Set min build version to 158
     @@
       ## Metadata ##
     -Author: Matt Oliver <protogonoi at gmail.com>
     +Author: softworkz <softworkz at hotmail.com>
      
       ## Commit message ##
          libx264: Set min build version to 158
     @@ Commit message
          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.
     +    The requirement for 158 is applied for msvc builds only,
     +    no change is made for all other cases.
      
     -    Submitted-by: softworkz <softworkz at hotmail.com>
     +    Co-authored-by: softworkz <softworkz at hotmail.com>
     +    Signed-off-by: softworkz <softworkz at hotmail.com>
          Signed-off-by: Matt Oliver <protogonoi at gmail.com>
      
       ## configure ##
     @@ configure: enabled libvpx            && {
      -                             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"
     ++                             require_cpp_condition libx264 x264.h "X264_BUILD >= 158" ||
     ++                             { "$toolchain" != msvc && require_cpp_condition libx264 x264.h "X264_BUILD >= 118"; }
       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"


 configure            | 8 +++-----
 libavcodec/libx264.c | 4 ----
 2 files changed, 3 insertions(+), 9 deletions(-)

diff --git a/configure b/configure
index f115b21064..9de9b7763a 100755
--- a/configure
+++ b/configure
@@ -6656,11 +6656,9 @@ 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 $libm_extralibs" &&
-                                 warn "using libx264 without pkg-config"; } } &&
-                             require_cpp_condition libx264 x264.h "X264_BUILD >= 118" &&
-                             check_cpp_condition libx262 x264.h "X264_MPEG2"
+enabled libx264           && check_pkg_config libx264 x264 "stdint.h x264.h" x264_encoder_encode &&
+                             require_cpp_condition libx264 x264.h "X264_BUILD >= 158" ||
+                             { "$toolchain" != msvc && require_cpp_condition libx264 x264.h "X264_BUILD >= 118"; }
 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: b033913d1c5998a29dfd13e9906dd707ff6eff12
-- 
ffmpeg-codebot