lavu/vulkan: add support for using libshaderc as a GLSL compiler

It's got a much better API that's actually maintained, it eliminates
race conditions, it comes with a pkg-config file by default, and
unfortunately isn't currently packaged by Debian or other large
distributions.

1 files changed, 14 insertions, 7 deletions

diff --git a/configure b/configure
index 79252ac223..a5f5d15b04 100755
--- a/configure
+++ b/configure
@@ -262,6 +262,7 @@ External library support:
   --enable-librsvg         enable SVG rasterization via librsvg [no]
   --enable-librubberband   enable rubberband needed for rubberband filter [no]
   --enable-librtmp         enable RTMP[E] support via librtmp [no]
+  --enable-libshaderc      enable GLSL->SPIRV compilation via libshaderc [no]
   --enable-libshine        enable fixed-point MP3 encoding via libshine [no]
   --enable-libsmbclient    enable Samba protocol via libsmbclient [no]
   --enable-libsnappy       enable Snappy compression, needed for hap encoding [no]
@@ -1834,6 +1835,7 @@ EXTERNAL_LIBRARY_LIST="
     librist
     librsvg
     librtmp
+    libshaderc
     libshine
     libsmbclient
     libsnappy
@@ -3565,7 +3567,7 @@ ass_filter_deps="libass"
 atempo_filter_deps="avcodec"
 atempo_filter_select="rdft"
 avgblur_opencl_filter_deps="opencl"
-avgblur_vulkan_filter_deps="vulkan libglslang"
+avgblur_vulkan_filter_deps="vulkan spirv_compiler"
 azmq_filter_deps="libzmq"
 blackframe_filter_deps="gpl"
 bm3d_filter_deps="avcodec"
@@ -3573,7 +3575,7 @@ bm3d_filter_select="dct"
 boxblur_filter_deps="gpl"
 boxblur_opencl_filter_deps="opencl gpl"
 bs2b_filter_deps="libbs2b"
-chromaber_vulkan_filter_deps="vulkan libglslang"
+chromaber_vulkan_filter_deps="vulkan spirv_compiler"
 colorkey_opencl_filter_deps="opencl"
 colormatrix_filter_deps="gpl"
 convolution_opencl_filter_deps="opencl"
@@ -3613,7 +3615,7 @@ frei0r_deps_any="libdl LoadLibrary"
 frei0r_filter_deps="frei0r"
 frei0r_src_filter_deps="frei0r"
 fspp_filter_deps="gpl"
-gblur_vulkan_filter_deps="vulkan libglslang"
+gblur_vulkan_filter_deps="vulkan spirv_compiler"
 histeq_filter_deps="gpl"
 hqdn3d_filter_deps="gpl"
 interlace_filter_deps="gpl"
@@ -3638,7 +3640,7 @@ openclsrc_filter_deps="opencl"
 overlay_opencl_filter_deps="opencl"
 overlay_qsv_filter_deps="libmfx"
 overlay_qsv_filter_select="qsvvpp"
-overlay_vulkan_filter_deps="vulkan libglslang"
+overlay_vulkan_filter_deps="vulkan spirv_compiler"
 owdenoise_filter_deps="gpl"
 pad_opencl_filter_deps="opencl"
 pan_filter_deps="swresample"
@@ -3701,7 +3703,7 @@ zmq_filter_deps="libzmq"
 zoompan_filter_deps="swscale"
 zscale_filter_deps="libzimg const_nan"
 scale_vaapi_filter_deps="vaapi"
-scale_vulkan_filter_deps="vulkan libglslang"
+scale_vulkan_filter_deps="vulkan spirv_compiler"
 vpp_qsv_filter_deps="libmfx"
 vpp_qsv_filter_select="qsvvpp"
 xfade_opencl_filter_deps="opencl"
@@ -6327,6 +6329,10 @@ if ! disabled ffnvcodec; then
       check_pkg_config ffnvcodec "ffnvcodec >= 8.1.24.11 ffnvcodec < 8.2" "$ffnv_hdr_list" ""
 fi
 
+if enabled_all libglslang libshaderc; then
+    die "ERROR: libshaderc and libglslang are mutually exclusive, if in doubt, disable libglslang"
+fi
+
 check_cpp_condition winrt windows.h "!WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)"
 
 if ! disabled w32threads && ! enabled pthreads; then
@@ -6443,10 +6449,10 @@ enabled fontconfig        && enable libfontconfig
 enabled libfontconfig     && require_pkg_config libfontconfig fontconfig "fontconfig/fontconfig.h" FcInit
 enabled libfreetype       && require_pkg_config libfreetype freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
 enabled libfribidi        && require_pkg_config libfribidi fribidi fribidi.h fribidi_version_info
-enabled libglslang && { check_lib libglslang glslang/Include/glslang_c_interface.h glslang_initialize_process \
+enabled libglslang && { check_lib spirv_compiler glslang/Include/glslang_c_interface.h glslang_initialize_process \
                             -lglslang -lMachineIndependent -lOSDependent -lHLSL -lOGLCompiler -lGenericCodeGen \
                             -lSPVRemapper -lSPIRV -lSPIRV-Tools-opt -lSPIRV-Tools -lpthread -lstdc++ -lm ||
-                        require libglslang glslang/Include/glslang_c_interface.h glslang_initialize_process \
+                        require spirv_compiler glslang/Include/glslang_c_interface.h glslang_initialize_process \
                             -lglslang -lOSDependent -lHLSL -lOGLCompiler \
                             -lSPVRemapper -lSPIRV -lSPIRV-Tools-opt -lSPIRV-Tools -lpthread -lstdc++ -lm; }
 enabled libgme            && { check_pkg_config libgme libgme gme/gme.h gme_new_emu ||
@@ -6504,6 +6510,7 @@ enabled librist           && require_pkg_config librist "librist >= 0.2" librist
 enabled librsvg           && require_pkg_config librsvg librsvg-2.0 librsvg-2.0/librsvg/rsvg.h rsvg_handle_render_cairo
 enabled librtmp           && require_pkg_config librtmp librtmp librtmp/rtmp.h RTMP_Socket
 enabled librubberband     && require_pkg_config librubberband "rubberband >= 1.8.1" rubberband/rubberband-c.h rubberband_new -lstdc++ && append librubberband_extralibs "-lstdc++"
+enabled libshaderc        && require_pkg_config spirv_compiler "shaderc >= 2019.1" shaderc/shaderc.h shaderc_compiler_initialize
 enabled libshine          && require_pkg_config libshine shine shine/layer3.h shine_encode_buffer
 enabled libsmbclient      && { check_pkg_config libsmbclient smbclient libsmbclient.h smbc_init ||
                                require libsmbclient libsmbclient.h smbc_init -lsmbclient; }