X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=configure;h=22eeca22a52dffe4baf2608890bcfd7671f1c3a1;hb=5420c8f76e70f5b390c8df07ab70e8b1e6d7fb75;hp=dad19f0106a77d4ebf3d4f2721b6e1b85878ecba;hpb=3c56d6734186336723150d3bcaf3405538710c53;p=ffmpeg

diff --git a/configure b/configure
index dad19f0106a..22eeca22a52 100755
--- a/configure
+++ b/configure
@@ -213,10 +213,11 @@ External library support:
   --enable-gmp             enable gmp, needed for rtmp(t)e support
                            if openssl or librtmp is not used [no]
   --enable-gnutls          enable gnutls, needed for https support
-                           if openssl or libtls is not used [no]
+                           if openssl, libtls or mbedtls is not used [no]
   --disable-iconv          disable iconv [autodetect]
   --enable-jni             enable JNI support [no]
   --enable-ladspa          enable LADSPA audio filtering [no]
+  --enable-libaom          enable AV1 video encoding/decoding via libaom [no]
   --enable-libass          enable libass subtitles rendering,
                            needed for subtitles and ass filter [no]
   --enable-libbluray       enable BluRay reading using libbluray [no]
@@ -256,11 +257,12 @@ External library support:
   --enable-libsnappy       enable Snappy compression, needed for hap encoding [no]
   --enable-libsoxr         enable Include libsoxr resampling [no]
   --enable-libspeex        enable Speex de/encoding via libspeex [no]
+  --enable-libsrt          enable Haivision SRT protocol via libsrt [no]
   --enable-libssh          enable SFTP protocol via libssh [no]
   --enable-libtesseract    enable Tesseract, needed for ocr filter [no]
   --enable-libtheora       enable Theora encoding via libtheora [no]
   --enable-libtls          enable LibreSSL (via libtls), needed for https support
-                           if openssl or gnutls is not used [no]
+                           if openssl, gnutls or mbedtls is not used [no]
   --enable-libtwolame      enable MP2 encoding via libtwolame [no]
   --enable-libv4l2         enable libv4l2/v4l-utils [no]
   --enable-libvidstab      enable video stabilization using vid.stab [no]
@@ -280,7 +282,8 @@ External library support:
   --enable-libxcb-shape    enable X11 grabbing shape rendering [autodetect]
   --enable-libxvid         enable Xvid encoding via xvidcore,
                            native MPEG-4/Xvid encoder exists [no]
-  --enable-libxml2         enable XML parsing using the C library libxml2 [no]
+  --enable-libxml2         enable XML parsing using the C library libxml2, needed
+                           for dash demuxing support [no]
   --enable-libzimg         enable z.lib, needed for zscale filter [no]
   --enable-libzmq          enable message passing via libzmq [no]
   --enable-libzvbi         enable teletext support via libzvbi [no]
@@ -288,19 +291,22 @@ External library support:
   --disable-lzma           disable lzma [autodetect]
   --enable-decklink        enable Blackmagic DeckLink I/O support [no]
   --enable-libndi_newtek   enable Newteck NDI I/O support [no]
+  --enable-mbedtls         enable mbedTLS, needed for https support
+                           if openssl, gnutls or libtls is not used [no]
   --enable-mediacodec      enable Android MediaCodec support [no]
   --enable-libmysofa       enable libmysofa, needed for sofalizer filter [no]
   --enable-openal          enable OpenAL 1.1 capture support [no]
   --enable-opencl          enable OpenCL processing [no]
   --enable-opengl          enable OpenGL rendering [no]
   --enable-openssl         enable openssl, needed for https support
-                           if gnutls or libtls is not used [no]
+                           if gnutls, libtls or mbedtls is not used [no]
   --disable-sndio          disable sndio support [autodetect]
   --disable-schannel       disable SChannel SSP, needed for TLS support on
                            Windows if openssl and gnutls are not used [autodetect]
   --disable-sdl2           disable sdl2 [autodetect]
   --disable-securetransport disable Secure Transport, needed for TLS support
                            on OSX if openssl and gnutls are not used [autodetect]
+  --enable-vapoursynth     enable VapourSynth demuxer [no]
   --disable-xlib           disable xlib [autodetect]
   --disable-zlib           disable zlib [autodetect]
 
@@ -341,6 +347,10 @@ Toolchain options:
   --target-samples=DIR     path to samples directory on target
   --tempprefix=PATH        force fixed dir/prefix instead of mktemp for checks
   --toolchain=NAME         set tool defaults according to NAME
+                           (gcc-asan, clang-asan, gcc-msan, clang-msan,
+                           gcc-tsan, clang-tsan, gcc-usan, clang-usan,
+                           valgrind-massif, valgrind-memcheck,
+                           msvc, icl, gcov, llvm-cov, hardened)
   --nm=NM                  use nm tool NM [$nm_default]
   --ar=AR                  use archive tool AR [$ar_default]
   --as=AS                  use assembler AS [$as_default]
@@ -910,13 +920,13 @@ add_compat(){
     map 'add_cppflags -D$v' "$@"
 }
 
-check_cmd(){
+test_cmd(){
     log "$@"
     "$@" >> $logfile 2>&1
 }
 
-check_stat(){
-    log check_stat "$@"
+test_stat(){
+    log test_stat "$@"
     stat "$1" >> $logfile 2>&1
 }
 
@@ -928,43 +938,74 @@ cc_e(){
     eval printf '%s\\n' $CC_E
 }
 
-check_cc(){
-    log check_cc "$@"
+test_cc(){
+    log test_cc "$@"
     cat > $TMPC
     log_file $TMPC
-    check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
+    test_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
 }
 
-check_cxx(){
-    log check_cxx "$@"
+test_cxx(){
+    log test_cxx "$@"
     cat > $TMPCPP
     log_file $TMPCPP
-    check_cmd $cxx $CPPFLAGS $CFLAGS $CXXFLAGS "$@" $CXX_C -o $TMPO $TMPCPP
+    test_cmd $cxx $CPPFLAGS $CFLAGS $CXXFLAGS "$@" $CXX_C -o $TMPO $TMPCPP
 }
 
-check_objcc(){
-    log check_objcc "$@"
+test_objcc(){
+    log test_objcc "$@"
     cat > $TMPM
     log_file $TMPM
-    check_cmd $objcc -Werror=missing-prototypes $CPPFLAGS $CFLAGS $OBJCFLAGS "$@" $OBJCC_C $(cc_o $TMPO) $TMPM
+    test_cmd $objcc -Werror=missing-prototypes $CPPFLAGS $CFLAGS $OBJCFLAGS "$@" $OBJCC_C $(cc_o $TMPO) $TMPM
 }
 
-check_cpp(){
-    log check_cpp "$@"
+test_cpp(){
+    log test_cpp "$@"
     cat > $TMPC
     log_file $TMPC
-    check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
+    test_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
 }
 
 as_o(){
     eval printf '%s\\n' $AS_O
 }
 
-check_as(){
-    log check_as "$@"
+test_as(){
+    log test_as "$@"
     cat > $TMPS
     log_file $TMPS
-    check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
+    test_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
+}
+
+x86asm_o(){
+    eval printf '%s\\n' $X86ASM_O
+}
+
+test_x86asm(){
+    log test_x86asm "$@"
+    echo "$1" > $TMPASM
+    log_file $TMPASM
+    shift
+    test_cmd $x86asmexe $X86ASMFLAGS -Werror "$@" $(x86asm_o $TMPO) $TMPASM
+}
+
+check_cmd(){
+    log check_cmd "$@"
+    cmd=$1
+    disabled $cmd && return
+    disable $cmd
+    test_cmd $@ && enable $cmd
+}
+
+check_as(){
+    log check_as "$@"
+    name=$1
+    code=$2
+    shift 2
+    disable $name
+    test_as $@ <<EOF && enable $name
+$code
+EOF
 }
 
 check_inline_asm(){
@@ -973,7 +1014,7 @@ check_inline_asm(){
     code="$2"
     shift 2
     disable $name
-    check_cc "$@" <<EOF && enable $name
+    test_cc "$@" <<EOF && enable $name
 void foo(void){ __asm__ volatile($code); }
 EOF
 }
@@ -993,38 +1034,47 @@ check_inline_asm_flags(){
 void foo(void){ __asm__ volatile($code); }
 EOF
     log_file $TMPC
-    check_cmd $cc $CPPFLAGS $CFLAGS $flags "$@" $CC_C $(cc_o $TMPO) $TMPC &&
+    test_cmd $cc $CPPFLAGS $CFLAGS $flags "$@" $CC_C $(cc_o $TMPO) $TMPC &&
     enable $name && add_cflags $flags && add_asflags $flags && add_ldflags $flags
 }
 
 check_insn(){
     log check_insn "$@"
     check_inline_asm ${1}_inline "$2"
-    echo "$2" | check_as && enable ${1}_external || disable ${1}_external
+    check_as ${1}_external "$2"
 }
 
 check_x86asm(){
     log check_x86asm "$@"
-    echo "$1" > $TMPS
-    log_file $TMPS
-    shift 1
-    check_cmd $x86asmexe $X86ASMFLAGS -Werror "$@" -o $TMPO $TMPS
+    name=$1
+    shift
+    disable $name
+    test_x86asm "$@" && enable $name
 }
 
 ld_o(){
     eval printf '%s\\n' $LD_O
 }
 
-check_ld(){
-    log check_ld "$@"
+test_ld(){
+    log test_ld "$@"
     type=$1
     shift 1
     flags=$(filter_out '-l*|*.so' $@)
     libs=$(filter '-l*|*.so' $@)
-    check_$type $($cflags_filter $flags) || return
+    test_$type $($cflags_filter $flags) || return
     flags=$($ldflags_filter $flags)
     libs=$($ldflags_filter $libs)
-    check_cmd $ld $LDFLAGS $LDEXEFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
+    test_cmd $ld $LDFLAGS $LDEXEFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
+}
+
+check_ld(){
+    log check_ld "$@"
+    type=$1
+    name=$2
+    shift 2
+    disable $name
+    test_ld $type $@ && enable $name
 }
 
 print_include(){
@@ -1034,8 +1084,8 @@ print_include(){
         echo "#include <$hdr>"
 }
 
-check_code(){
-    log check_code "$@"
+test_code(){
+    log test_code "$@"
     check=$1
     headers=$2
     code=$3
@@ -1045,12 +1095,12 @@ check_code(){
             print_include $hdr
         done
         echo "int main(void) { $code; return 0; }"
-    } | check_$check "$@"
+    } | test_$check "$@"
 }
 
 check_cppflags(){
     log check_cppflags "$@"
-    check_cpp "$@" <<EOF && append CPPFLAGS "$@"
+    test_cpp "$@" <<EOF && append CPPFLAGS "$@"
 #include <stdlib.h>
 EOF
 }
@@ -1058,7 +1108,7 @@ EOF
 test_cflags(){
     log test_cflags "$@"
     set -- $($cflags_filter "$@")
-    check_cc "$@" <<EOF
+    test_cc "$@" <<EOF
 int x;
 EOF
 }
@@ -1071,7 +1121,7 @@ check_cflags(){
 check_cxxflags(){
     log check_cxxflags "$@"
     set -- $($cflags_filter "$@")
-    check_cxx "$@" <<EOF && append CXXFLAGS "$@"
+    test_cxx "$@" <<EOF && append CXXFLAGS "$@"
 int x;
 EOF
 }
@@ -1079,7 +1129,7 @@ EOF
 test_objcflags(){
     log test_objcflags "$@"
     set -- $($objcflags_filter "$@")
-    check_objcc "$@" <<EOF
+    test_objcc "$@" <<EOF
 int x;
 EOF
 }
@@ -1092,7 +1142,7 @@ check_objcflags(){
 test_ldflags(){
     log test_ldflags "$@"
     set -- $($ldflags_filter "$@")
-    check_ld "cc" "$@" <<EOF
+    test_ld "cc" "$@" <<EOF
 int main(void){ return 0; }
 EOF
 }
@@ -1104,11 +1154,11 @@ check_ldflags(){
 
 test_stripflags(){
     log test_stripflags "$@"
-    # call check_cc to get a fresh TMPO
-    check_cc <<EOF
+    # call test_cc to get a fresh TMPO
+    test_cc <<EOF
 int main(void) { return 0; }
 EOF
-    check_cmd $strip $ASMSTRIPFLAGS "$@" $TMPO
+    test_cmd $strip $ASMSTRIPFLAGS "$@" $TMPO
 }
 
 check_stripflags(){
@@ -1126,7 +1176,7 @@ check_header(){
             print_include $hdr
         done
         echo "int x;"
-    } | check_cpp "$@" && enable_sanitized $headers
+    } | test_cpp "$@" && enable_sanitized $headers
 }
 
 check_header_objcc(){
@@ -1138,7 +1188,7 @@ check_header_objcc(){
     {
        echo "#include <$header>"
        echo "int main(void) { return 0; }"
-    } | check_objcc && check_stat "$TMPO" && enable_sanitized $header
+    } | test_objcc && test_stat "$TMPO" && enable_sanitized $header
 }
 
 check_apple_framework(){
@@ -1156,7 +1206,7 @@ check_func(){
     func=$1
     shift
     disable $func
-    check_ld "cc" "$@" <<EOF && enable $func
+    test_ld "cc" "$@" <<EOF && enable $func
 extern int $func();
 int main(void){ $func(); }
 EOF
@@ -1169,7 +1219,7 @@ check_complexfunc(){
     shift 2
     test $narg = 2 && args="f, g" || args="f * I"
     disable $func
-    check_ld "cc" "$@" <<EOF && enable $func
+    test_ld "cc" "$@" <<EOF && enable $func
 #include <complex.h>
 #include <math.h>
 float foo(complex float f, complex float g) { return $func($args); }
@@ -1184,7 +1234,7 @@ check_mathfunc(){
     shift 2
     test $narg = 2 && args="f, g" || args="f"
     disable $func
-    check_ld "cc" "$@" <<EOF && enable $func
+    test_ld "cc" "$@" <<EOF && enable $func
 #include <math.h>
 float foo(float f, float g) { return $func($args); }
 int main(void){ return (int) foo; }
@@ -1210,7 +1260,7 @@ check_func_headers(){
             echo " ret |= ((intptr_t)check_$func) & 0xFFFF;"
         done
         echo "return ret; }"
-    } | check_ld "cc" "$@" && enable $funcs && enable_sanitized $headers
+    } | test_ld "cc" "$@" && enable $funcs && enable_sanitized $headers
 }
 
 check_class_headers_cpp(){
@@ -1229,15 +1279,15 @@ check_class_headers_cpp(){
             i=$(expr $i + 1)
         done
         echo "return 0; }"
-    } | check_ld "cxx" "$@" && enable $funcs && enable_sanitized $headers
+    } | test_ld "cxx" "$@" && enable $funcs && enable_sanitized $headers
 }
 
-check_cpp_condition(){
-    log check_cpp_condition "$@"
+test_cpp_condition(){
+    log test_cpp_condition "$@"
     header=$1
     condition=$2
     shift 2
-    check_cpp "$@" <<EOF
+    test_cpp "$@" <<EOF
 #include <$header>
 #if !($condition)
 #error "unsatisfied condition: $condition"
@@ -1245,6 +1295,14 @@ check_cpp_condition(){
 EOF
 }
 
+check_cpp_condition(){
+    log check_cpp_condition "$@"
+    name=$1
+    shift 1
+    disable $name
+    test_cpp_condition "$@" && enable $name
+}
+
 test_cflags_cc(){
     log test_cflags_cc "$@"
     flags=$1
@@ -1252,7 +1310,7 @@ test_cflags_cc(){
     condition=$3
     shift 3
     set -- $($cflags_filter "$flags")
-    check_cc "$@" <<EOF
+    test_cc "$@" <<EOF
 #include <$header>
 #if !($condition)
 #error "unsatisfied condition: $condition"
@@ -1291,7 +1349,7 @@ test_pkg_config(){
     funcs="$4"
     shift 4
     disable $name
-    check_cmd $pkg_config --exists --print-errors $pkg_version || return
+    test_cmd $pkg_config --exists --print-errors $pkg_version || return
     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
@@ -1307,8 +1365,8 @@ check_pkg_config(){
         eval add_cflags \$${name}_cflags
 }
 
-check_exec(){
-    check_ld "cc" "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
+test_exec(){
+    test_ld "cc" "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
 }
 
 check_exec_crash(){
@@ -1321,7 +1379,7 @@ check_exec_crash(){
     # can redirect the "Terminated" message from the shell.  SIGBUS
     # is not defined by standard C so it is used conditionally.
 
-    (check_exec "$@") >> $logfile 2>&1 <<EOF
+    (test_exec "$@") >> $logfile 2>&1 <<EOF
 #include <signal.h>
 static void sighandler(int sig){
     raise(SIGTERM);
@@ -1348,7 +1406,7 @@ check_type(){
     type=$2
     shift 2
     disable_sanitized "$type"
-    check_code cc "$headers" "$type v" "$@" && enable_sanitized "$type"
+    test_code cc "$headers" "$type v" "$@" && enable_sanitized "$type"
 }
 
 check_struct(){
@@ -1358,7 +1416,7 @@ check_struct(){
     member=$3
     shift 3
     disable_sanitized "${struct}_${member}"
-    check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
+    test_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
         enable_sanitized "${struct}_${member}"
 }
 
@@ -1369,7 +1427,7 @@ check_builtin(){
     builtin=$3
     shift 3
     disable "$name"
-    check_code ld "$headers" "$builtin" "cc" "$@" && enable "$name"
+    test_code ld "$headers" "$builtin" "cc" "$@" && enable "$name"
 }
 
 check_compile_assert(){
@@ -1379,7 +1437,15 @@ check_compile_assert(){
     condition=$3
     shift 3
     disable "$name"
-    check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
+    test_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
+}
+
+check_cc(){
+    log check_cc "$@"
+    name=$1
+    shift
+    disable "$name"
+    test_code cc "$@" && enable "$name"
 }
 
 require(){
@@ -1390,6 +1456,13 @@ require(){
     check_lib $name "$@" || die "ERROR: $name_version not found"
 }
 
+require_cc(){
+    log require_cc "$@"
+    name="$1"
+    shift
+    test_code cc "$@" || die "ERROR: $name failed"
+}
+
 require_cpp(){
     name="$1"
     headers="$2"
@@ -1407,7 +1480,7 @@ require_header(){
 require_cpp_condition(){
     log require_cpp_condition "$@"
     condition="$2"
-    check_cpp_condition "$@" || die "ERROR: $condition not satisfied"
+    test_cpp_condition "$@" || die "ERROR: $condition not satisfied"
 }
 
 require_pkg_config(){
@@ -1424,23 +1497,23 @@ hostcc_o(){
     eval printf '%s\\n' $HOSTCC_O
 }
 
-check_host_cc(){
-    log check_host_cc "$@"
+test_host_cc(){
+    log test_host_cc "$@"
     cat > $TMPC
     log_file $TMPC
-    check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
+    test_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
 }
 
-check_host_cpp(){
-    log check_host_cpp "$@"
+test_host_cpp(){
+    log test_host_cpp "$@"
     cat > $TMPC
     log_file $TMPC
-    check_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
+    test_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
 }
 
 check_host_cppflags(){
     log check_host_cppflags "$@"
-    check_host_cpp "$@" <<EOF && append host_cppflags "$@"
+    test_host_cpp "$@" <<EOF && append host_cppflags "$@"
 #include <stdlib.h>
 EOF
 }
@@ -1448,17 +1521,17 @@ EOF
 check_host_cflags(){
     log check_host_cflags "$@"
     set -- $($host_cflags_filter "$@")
-    check_host_cc "$@" <<EOF && append host_cflags "$@"
+    test_host_cc "$@" <<EOF && append host_cflags "$@"
 int x;
 EOF
 }
 
-check_host_cpp_condition(){
-    log check_host_cpp_condition "$@"
+test_host_cpp_condition(){
+    log test_host_cpp_condition "$@"
     header=$1
     condition=$2
     shift 2
-    check_host_cpp "$@" <<EOF
+    test_host_cpp "$@" <<EOF
 #include <$header>
 #if !($condition)
 #error "unsatisfied condition: $condition"
@@ -1466,6 +1539,14 @@ check_host_cpp_condition(){
 EOF
 }
 
+check_host_cpp_condition(){
+    log check_host_cpp_condition "$@"
+    name=$1
+    shift 1
+    disable $name
+    test_host_cpp_condition "$@" && enable $name
+}
+
 cp_if_changed(){
     cmp -s "$1" "$2" && { test "$quiet" != "yes" && echo "$2 is unchanged"; } && return
     mkdir -p "$(dirname $2)"
@@ -1577,6 +1658,7 @@ EXTERNAL_LIBRARY_VERSION3_LIST="
     libopencore_amrwb
     libvmaf
     libvo_amrwbenc
+    mbedtls
     rkmpp
 "
 
@@ -1594,6 +1676,7 @@ EXTERNAL_LIBRARY_LIST="
     gnutls
     jni
     ladspa
+    libaom
     libass
     libbluray
     libbs2b
@@ -1628,6 +1711,7 @@ EXTERNAL_LIBRARY_LIST="
     libsnappy
     libsoxr
     libspeex
+    libsrt
     libssh
     libtesseract
     libtheora
@@ -1645,6 +1729,7 @@ EXTERNAL_LIBRARY_LIST="
     mediacodec
     openal
     opengl
+    vapoursynth
 "
 
 HWACCEL_AUTODETECT_LIBRARY_LIST="
@@ -1937,6 +2022,7 @@ HEADERS_LIST="
     ES2_gl_h
     gsm_h
     io_h
+    linux_perf_event_h
     machine_ioctl_bt848_h
     machine_ioctl_meteor_h
     malloc_h
@@ -2062,14 +2148,15 @@ SYSTEM_FUNCS="
 "
 
 SYSTEM_LIBRARIES="
+    bcrypt
     vaapi_drm
     vaapi_x11
     vdpau_x11
-    wincrypt
 "
 
 TOOLCHAIN_FEATURES="
     as_arch_directive
+    as_dn_directive
     as_fpu_directive
     as_func
     as_object_arch
@@ -2132,6 +2219,7 @@ HAVE_LIST="
     makeinfo_html
     opencl_d3d11
     opencl_drm_arm
+    opencl_drm_beignet
     opencl_dxva2
     opencl_vaapi_beignet
     opencl_vaapi_intel_media
@@ -2154,6 +2242,7 @@ CONFIG_EXTRA="
     cbs_h264
     cbs_h265
     cbs_mpeg2
+    cbs_vp9
     dirac_parse
     dvprofile
     exif
@@ -2290,6 +2379,7 @@ CMDLINE_SET="
     malloc_prefix
     nm
     optflags
+    nvcc
     nvccflags
     pkg_config
     pkg_config_flags
@@ -2397,6 +2487,7 @@ simd_align_32_if_any="avx"
 simd_align_64_if_any="avx512"
 
 # system capabilities
+linux_perf_deps="linux_perf_event_h"
 symver_if_any="symver_asm_label symver_gnu_asm"
 valgrind_backtrace_conflict="optimizations"
 valgrind_backtrace_deps="valgrind_valgrind_h"
@@ -2413,6 +2504,7 @@ threads_if_any="$THREADS_LIST"
 cbs_h264_select="cbs golomb"
 cbs_h265_select="cbs golomb"
 cbs_mpeg2_select="cbs"
+cbs_vp9_select="cbs"
 dct_select="rdft"
 dirac_parse_select="golomb"
 error_resilience_select="me_cmp"
@@ -2437,7 +2529,7 @@ rdft_select="fft"
 
 # decoders / encoders
 aac_decoder_select="adts_header mdct15 mdct sinewin"
-aac_fixed_decoder_select="mdct sinewin"
+aac_fixed_decoder_select="adts_header mdct sinewin"
 aac_encoder_select="audio_frame_queue iirfilter lpc mdct sinewin"
 aac_latm_decoder_select="aac_decoder aac_latm_parser"
 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
@@ -2792,7 +2884,7 @@ qsvdec_select="qsv"
 qsvenc_select="qsv"
 qsvvpp_select="qsv"
 vaapi_encode_deps="vaapi"
-v4l2_m2m_deps_any="linux_videodev2_h"
+v4l2_m2m_deps="linux_videodev2_h sem_timedwait"
 
 hwupload_cuda_filter_deps="ffnvcodec"
 scale_npp_filter_deps="ffnvcodec libnpp"
@@ -2895,12 +2987,15 @@ vc1_parser_select="vc1dsp"
 
 # bitstream_filters
 aac_adtstoasc_bsf_select="adts_header"
+filter_units_bsf_select="cbs"
+h264_metadata_bsf_deps="const_nan"
 h264_metadata_bsf_select="cbs_h264"
 h264_redundant_pps_bsf_select="cbs_h264"
 hevc_metadata_bsf_select="cbs_h265"
 mjpeg2jpeg_bsf_select="jpegtables"
 mpeg2_metadata_bsf_select="cbs_mpeg2"
-trace_headers_bsf_select="cbs_h264 cbs_h265 cbs_mpeg2"
+trace_headers_bsf_select="cbs"
+vp9_metadata_bsf_select="cbs_vp9"
 
 # external libraries
 aac_at_decoder_deps="audiotoolbox"
@@ -2942,6 +3037,8 @@ h264_videotoolbox_encoder_deps="pthreads"
 h264_videotoolbox_encoder_select="videotoolbox_encoder"
 hevc_videotoolbox_encoder_deps="pthreads"
 hevc_videotoolbox_encoder_select="videotoolbox_encoder"
+libaom_av1_decoder_deps="libaom"
+libaom_av1_encoder_deps="libaom"
 libcelt_decoder_deps="libcelt"
 libcodec2_decoder_deps="libcodec2"
 libcodec2_encoder_deps="libcodec2"
@@ -3000,6 +3097,7 @@ libx265_encoder_deps="libx265"
 libxavs_encoder_deps="libxavs"
 libxvid_encoder_deps="libxvid"
 libzvbi_teletext_decoder_deps="libzvbi"
+vapoursynth_demuxer_deps="vapoursynth"
 videotoolbox_suggest="coreservices"
 videotoolbox_deps="corefoundation coremedia corevideo"
 videotoolbox_encoder_deps="videotoolbox VTCompressionSessionPrepareToEncodeFrames"
@@ -3134,14 +3232,13 @@ v4l2_outdev_suggest="libv4l2"
 vfwcap_indev_deps="vfw32 vfwcap_defines"
 xcbgrab_indev_deps="libxcb"
 xcbgrab_indev_suggest="libxcb_shm libxcb_shape libxcb_xfixes"
-xv_outdev_deps="X11_extensions_Xvlib_h XvGetPortAttribute"
-xv_outdev_extralibs="-lXv -lX11 -lXext"
+xv_outdev_deps="xlib"
 
 # protocols
 async_protocol_deps="threads"
 bluray_protocol_deps="libbluray"
 ffrtmpcrypt_protocol_conflict="librtmp_protocol"
-ffrtmpcrypt_protocol_deps_any="gcrypt gmp openssl"
+ffrtmpcrypt_protocol_deps_any="gcrypt gmp openssl mbedtls"
 ffrtmpcrypt_protocol_select="tcp_protocol"
 ffrtmphttp_protocol_conflict="librtmp_protocol"
 ffrtmphttp_protocol_select="http_protocol"
@@ -3161,9 +3258,11 @@ librtmpt_protocol_deps="librtmp"
 librtmpte_protocol_deps="librtmp"
 libsmbclient_protocol_deps="libsmbclient gplv3"
 libssh_protocol_deps="libssh"
-libtls_conflict="openssl gnutls"
+libtls_conflict="openssl gnutls mbedtls"
 mmsh_protocol_select="http_protocol"
 mmst_protocol_select="network"
+libsrt_protocol_deps="libsrt"
+libsrt_protocol_select="network"
 rtmp_protocol_conflict="librtmp_protocol"
 rtmp_protocol_select="tcp_protocol"
 rtmp_protocol_suggest="zlib"
@@ -3179,13 +3278,13 @@ rtmpte_protocol_suggest="zlib"
 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
 rtmpts_protocol_suggest="zlib"
 rtp_protocol_select="udp_protocol"
-schannel_conflict="openssl gnutls libtls"
+schannel_conflict="openssl gnutls libtls mbedtls"
 sctp_protocol_deps="struct_sctp_event_subscribe struct_msghdr_msg_flags"
 sctp_protocol_select="network"
-securetransport_conflict="openssl gnutls libtls"
+securetransport_conflict="openssl gnutls libtls mbedtls"
 srtp_protocol_select="rtp_protocol srtp"
 tcp_protocol_select="network"
-tls_protocol_deps_any="gnutls openssl schannel securetransport libtls"
+tls_protocol_deps_any="gnutls openssl schannel securetransport libtls mbedtls"
 tls_protocol_select="tcp_protocol"
 udp_protocol_select="network"
 udplite_protocol_select="network"
@@ -3202,11 +3301,13 @@ aresample_filter_deps="swresample"
 ass_filter_deps="libass"
 atempo_filter_deps="avcodec"
 atempo_filter_select="rdft"
+avgblur_opencl_filter_deps="opencl"
 azmq_filter_deps="libzmq"
 blackframe_filter_deps="gpl"
 boxblur_filter_deps="gpl"
 bs2b_filter_deps="libbs2b"
 colormatrix_filter_deps="gpl"
+convolution_opencl_filter_deps="opencl"
 convolve_filter_deps="avcodec"
 convolve_filter_select="fft"
 coreimage_filter_deps="coreimage appkit"
@@ -3228,6 +3329,8 @@ elbg_filter_deps="avcodec"
 eq_filter_deps="gpl"
 fftfilt_filter_deps="avcodec"
 fftfilt_filter_select="rdft"
+fftdnoiz_filter_deps="avcodec"
+fftdnoiz_filter_select="fft"
 find_rect_filter_deps="avcodec avformat gpl"
 firequalizer_filter_deps="avcodec"
 firequalizer_filter_select="rdft"
@@ -3292,6 +3395,7 @@ spectrumsynth_filter_deps="avcodec"
 spectrumsynth_filter_select="fft"
 spp_filter_deps="gpl avcodec"
 spp_filter_select="fft idctdsp fdctdsp me_cmp pixblockdsp"
+srcnn_filter_deps="avformat"
 stereo3d_filter_deps="gpl"
 subtitles_filter_deps="avformat avcodec libass"
 super2xsai_filter_deps="gpl"
@@ -3354,7 +3458,7 @@ avformat_deps="avcodec avutil"
 avformat_suggest="libm network zlib"
 avresample_deps="avutil"
 avresample_suggest="libm"
-avutil_suggest="clock_gettime ffnvcodec libm libdrm libmfx opencl user32 vaapi videotoolbox corefoundation corevideo coremedia wincrypt"
+avutil_suggest="clock_gettime ffnvcodec libm libdrm libmfx opencl user32 vaapi videotoolbox corefoundation corevideo coremedia bcrypt"
 postproc_deps="avutil gpl"
 postproc_suggest="libm"
 swresample_deps="avutil"
@@ -3367,7 +3471,7 @@ avfilter_extralibs="pthreads_extralibs"
 avutil_extralibs="d3d11va_extralibs nanosleep_extralibs pthreads_extralibs vaapi_drm_extralibs vaapi_x11_extralibs vdpau_x11_extralibs"
 
 # programs
-ffmpeg_deps="avcodec avfilter avformat swresample"
+ffmpeg_deps="avcodec avfilter avformat"
 ffmpeg_select="aformat_filter anull_filter atrim_filter format_filter
                null_filter
                trim_filter"
@@ -3533,15 +3637,6 @@ for v in "$@"; do
     FFMPEG_CONFIGURATION="${FFMPEG_CONFIGURATION# } ${l}${r}"
 done
 
-find_things(){
-    thing=$1
-    pattern=$2
-    file=$source_path/$3
-    sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
-}
-
-FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
-
 find_things_extern(){
     thing=$1
     pattern=$2
@@ -3550,6 +3645,13 @@ find_things_extern(){
     sed -n "s/^[^#]*extern.*$pattern *ff_\([^ ]*\)_$thing;/\1_$out/p" "$file"
 }
 
+find_filters_extern(){
+    file=$source_path/$1
+    #sed -n "s/^extern AVFilter ff_\([avfsinkrc]\{2,5\}\)_\(\w\+\);/\2_filter/p" $file
+    sed -E -n "s/^extern AVFilter ff_([avfsinkrc]{2,5})_([a-zA-Z0-9_]+);/\2_filter/p" $file
+}
+
+FILTER_LIST=$(find_filters_extern libavfilter/allfilters.c)
 OUTDEV_LIST=$(find_things_extern muxer AVOutputFormat libavdevice/alldevices.c outdev)
 INDEV_LIST=$(find_things_extern demuxer AVInputFormat libavdevice/alldevices.c indev)
 MUXER_LIST=$(find_things_extern muxer AVOutputFormat libavformat/allformats.c)
@@ -3817,6 +3919,12 @@ fi
 enabled_all gnutls openssl &&
     die "GnuTLS and OpenSSL must not be enabled at the same time."
 
+enabled_all gnutls mbedtls &&
+    die "GnuTLS and mbedTLS must not be enabled at the same time."
+
+enabled_all openssl mbedtls &&
+    die "OpenSSL and mbedTLS must not be enabled at the same time."
+
 # Disable all the library-specific components if the library itself
 # is disabled, see AVCODEC_LIST and following _LIST variables.
 
@@ -3834,7 +3942,7 @@ set >> $logfile
 
 test -n "$valgrind" && toolchain="valgrind-memcheck"
 
-enabled ossfuzz && {
+enabled ossfuzz && ! echo $CFLAGS | grep -q -- "-fsanitize="  &&{
     add_cflags  -fsanitize=address,undefined -fsanitize-coverage=trace-pc-guard,trace-cmp -fno-omit-frame-pointer
     add_ldflags -fsanitize=address,undefined -fsanitize-coverage=trace-pc-guard,trace-cmp
 }
@@ -3889,8 +3997,7 @@ case "$toolchain" in
             cc_default="cl"
             cxx_default="cl"
         else
-            cc_default="c99wrap cl"
-            cxx_default="c99wrap cl"
+            die "Unsupported MSVC version (2013 or newer required)"
         fi
         ld_default="$source_path/compat/windows/mslink"
         nm_default="dumpbin -symbols"
@@ -3998,7 +4105,7 @@ if [ -n "$tempprefix" ] ; then
         echo "$tmpname"
         mkdir "$tmpname"
     }
-elif ! check_cmd mktemp -u XXXXXX; then
+elif ! test_cmd mktemp -u XXXXXX; then
     # simple replacement for missing mktemp
     # NOT SAFE FOR GENERAL USE
     mktemp(){
@@ -4250,7 +4357,7 @@ probe_cc(){
         _depflags='-MMD'
         _cflags_speed='-O3'
         _cflags_size='-Os'
-    elif $_cc -v 2>&1 | grep -q clang; then
+    elif $_cc -v 2>&1 | grep -q clang && ! $_cc -? > /dev/null 2>&1; then
         _type=clang
         _ident=$($_cc --version 2>/dev/null | head -n1)
         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
@@ -4321,7 +4428,7 @@ probe_cc(){
         _flags_filter=msvc_flags
         _ld_lib='lib%.a'
         _ld_path='-libpath:'
-    elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
+    elif $_cc -nologo- 2>&1 | grep -q Microsoft || { $_cc -v 2>&1 | grep -q clang && $_cc -? > /dev/null 2>&1; }; then
         _type=msvc
         _ident=$($_cc 2>&1 | head -n1 | tr -d '\r')
         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
@@ -4548,7 +4655,7 @@ elif enabled alpha; then
 elif enabled arm; then
 
     check_arm_arch() {
-        check_cpp_condition stddef.h \
+        test_cpp_condition stddef.h \
             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
             $cpuflags
     }
@@ -4838,7 +4945,7 @@ if [ "$cpu" != generic ]; then
 fi
 
 # compiler sanity check
-check_exec <<EOF
+test_exec <<EOF
 int main(void){ return 0; }
 EOF
 if test "$?" != 0; then
@@ -4872,7 +4979,7 @@ check_64bit(){
     arch32=$1
     arch64=$2
     expr=${3:-'sizeof(void *) > 4'}
-    check_code cc "" "int test[2*($expr) - 1]" &&
+    test_code cc "" "int test[2*($expr) - 1]" &&
         subarch=$arch64 || subarch=$arch32
     enable $subarch
 }
@@ -4904,7 +5011,7 @@ case "$arch" in
     x86)
         check_64bit x86_32 x86_64
         # Treat x32 as x64 for now. Note it also needs pic if shared
-        test "$subarch" = "x86_32" && check_cpp_condition stddef.h 'defined(__x86_64__)' &&
+        test "$subarch" = "x86_32" && test_cpp_condition stddef.h 'defined(__x86_64__)' &&
             subarch=x86_64 && enable x86_64 && disable x86_32
         if enabled x86_64; then
             enabled shared && enable_weak pic
@@ -4920,6 +5027,7 @@ case $target_os in
         add_cppflags '-I\$(SRC_PATH)/compat/aix'
         enabled shared && add_ldflags -Wl,-brtl
         arflags='-Xany -r -c'
+        striptype=""
         ;;
     android)
         disable symver
@@ -4958,6 +5066,7 @@ case $target_os in
         ;;
     openbsd|bitrig)
         disable symver
+        striptype=""
         SHFLAGS='-shared'
         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
         SLIB_INSTALL_LINKS=
@@ -5013,14 +5122,14 @@ case $target_os in
             # Cannot build both shared and static libs when using dllimport.
             disable static
         fi
-        enabled shared && ! enabled small && check_cmd $windres --version && enable gnu_windres
+        enabled shared && ! enabled small && test_cmd $windres --version && enable gnu_windres
         enabled x86_32 && check_ldflags -Wl,--large-address-aware
         shlibdir_default="$bindir_default"
         SLIBPREF=""
         SLIBSUF=".dll"
         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
-        if check_cmd lib.exe -list; then
+        if test_cmd lib.exe -list; then
             SLIB_EXTRA_CMD=-'lib.exe -nologo -machine:$(LIBTARGET) -def:$$(@:$(SLIBSUF)=.def) -out:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
             if enabled x86_64; then
                 LIBTARGET=x64
@@ -5092,7 +5201,7 @@ case $target_os in
         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
         enabled x86_64 && objformat="win64" || objformat="win32"
         enable dos_paths
-        enabled shared && ! enabled small && check_cmd $windres --version && enable gnu_windres
+        enabled shared && ! enabled small && test_cmd $windres --version && enable gnu_windres
         add_cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
         ;;
     *-dos|freedos|opendos)
@@ -5190,44 +5299,44 @@ probe_libc(){
     pfx=$1
     pfx_no_=${pfx%_}
     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
-    if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
+    if test_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
         eval ${pfx}libc_type=uclibc
         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
-    elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
+    elif test_${pfx}cpp_condition features.h "defined __GLIBC__"; then
         eval ${pfx}libc_type=glibc
         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
     # MinGW headers can be installed on Cygwin, so check for newlib first.
-    elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
+    elif test_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
         eval ${pfx}libc_type=newlib
         add_${pfx}cppflags -U__STRICT_ANSI__ -D_XOPEN_SOURCE=600
     # MinGW64 is backwards compatible with MinGW32, so check for it first.
-    elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
+    elif test_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
         eval ${pfx}libc_type=mingw64
-        if check_${pfx}cpp_condition _mingw.h "__MINGW64_VERSION_MAJOR < 3"; then
+        if test_${pfx}cpp_condition _mingw.h "__MINGW64_VERSION_MAJOR < 3"; then
             add_compat msvcrt/snprintf.o
             add_cflags "-include $source_path/compat/msvcrt/snprintf.h"
         fi
         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
         eval test \$${pfx_no_}cc_type = "gcc" &&
             add_${pfx}cppflags -D__printf__=__gnu_printf__
-        check_${pfx}cpp_condition windows.h "!defined(_WIN32_WINNT) || _WIN32_WINNT < 0x0600" &&
+        test_${pfx}cpp_condition windows.h "!defined(_WIN32_WINNT) || _WIN32_WINNT < 0x0600" &&
             add_${pfx}cppflags -D_WIN32_WINNT=0x0600
-    elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
-         check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
+    elif test_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
+         test_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
         eval ${pfx}libc_type=mingw32
-        check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
+        test_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
             die "ERROR: MinGW32 runtime version must be >= 3.15."
         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
-        check_${pfx}cpp_condition _mingw.h "__MSVCRT_VERSION__ < 0x0700" &&
+        test_${pfx}cpp_condition _mingw.h "__MSVCRT_VERSION__ < 0x0700" &&
             add_${pfx}cppflags -D__MSVCRT_VERSION__=0x0700
-        check_${pfx}cpp_condition windows.h "!defined(_WIN32_WINNT) || _WIN32_WINNT < 0x0600" &&
+        test_${pfx}cpp_condition windows.h "!defined(_WIN32_WINNT) || _WIN32_WINNT < 0x0600" &&
             add_${pfx}cppflags -D_WIN32_WINNT=0x0600
         eval test \$${pfx_no_}cc_type = "gcc" &&
             add_${pfx}cppflags -D__printf__=__gnu_printf__
-    elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
+    elif test_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
         eval ${pfx}libc_type=msvcrt
-        if check_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
+        if test_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
             if [ "$pfx" = host_ ]; then
                 add_host_cppflags -Dsnprintf=_snprintf
             else
@@ -5248,8 +5357,8 @@ probe_libc(){
         # family. For these cases, configure is free to use any functions
         # found in the SDK headers by default. (Alternatively, we could force
         # _WIN32_WINNT to 0x0602 in that case.)
-        check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
-            { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0600; }
+        test_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
+            { test_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0600; }
 #ifdef WINAPI_FAMILY
 #include <winapifamily.h>
 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
@@ -5261,19 +5370,19 @@ EOF
             check_func strtoll || add_cflags -Dstrtoll=_strtoi64
             check_func strtoull || add_cflags -Dstrtoull=_strtoui64
         fi
-    elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
+    elif test_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
         eval ${pfx}libc_type=klibc
-    elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
+    elif test_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
         eval ${pfx}libc_type=bionic
-    elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
+    elif test_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
         eval ${pfx}libc_type=solaris
         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
     fi
-    check_${pfx}cc <<EOF
+    test_${pfx}cc <<EOF
 #include <time.h>
 void *v = localtime_r;
 EOF
-test "$?" != 0 && check_${pfx}cc -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 <<EOF && add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
+test "$?" != 0 && test_${pfx}cc -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 <<EOF && add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
 #include <time.h>
 void *v = localtime_r;
 EOF
@@ -5295,7 +5404,7 @@ esac
 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
     add_cppflags '-I\$(SRC_PATH)/compat/float'
 
-check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
+test_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
 
 set_default libdir
 : ${shlibdir_default:="$libdir"}
@@ -5322,7 +5431,7 @@ enable_weak_pic() {
 
 enabled pic && enable_weak_pic
 
-check_cc <<EOF || die "Symbol mangling check failed."
+test_cc <<EOF || die "Symbol mangling check failed."
 int ff_extern;
 EOF
 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
@@ -5331,24 +5440,18 @@ extern_prefix=${sym%%ff_extern*}
 ! disabled inline_asm && check_inline_asm inline_asm '"" ::'
 
 for restrict_keyword in restrict __restrict__ __restrict ""; do
-    check_cc <<EOF && break
-void foo(char * $restrict_keyword p);
-EOF
+    test_code cc "" "char * $restrict_keyword p" && break
 done
 
-check_cc <<EOF && enable pragma_deprecated
-void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
-EOF
+check_cc pragma_deprecated "" '_Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"")'
 
-check_cc <<EOF || die "endian test failed"
+# The global variable ensures the bits appear unchanged in the object file.
+test_cc <<EOF || die "endian test failed"
 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
 EOF
 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
 
-check_cc <<EOF && enable const_nan
-#include <math.h>
-void foo(void) { struct { double d; } static const bar[] = { { NAN } }; }
-EOF
+check_cc const_nan math.h "struct { double d; } static const bar[] = { { NAN } }"
 
 if ! enabled ppc64 || enabled bigendian; then
     disable vsx
@@ -5357,18 +5460,13 @@ fi
 check_gas() {
     log "check_gas using '$as' as AS"
     # :vararg is used on aarch64, arm and ppc altivec
-    check_as <<EOF || return 1
+    check_as vararg "
 .macro m n, y:vararg=0
 \n: .int \y
 .endm
-m x
-EOF
+m x" || return 1
     # .altmacro is only used in arm asm
-    ! enabled arm || check_as <<EOF || return 1
-.altmacro
-EOF
-    enable gnu_as
-    return 0
+    ! enabled arm || check_as gnu_as ".altmacro"
 }
 
 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
@@ -5386,7 +5484,7 @@ if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
 
     test "${as#*gas-preprocessor.pl}" != "$as" ||
-    check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- ${as:=$cc} $as_noop &&
+    test_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- ${as:=$cc} $as_noop &&
         gas="${gas:=gas-preprocessor.pl} -arch $arch -as-type $gaspp_as_type -- ${as:=$cc}"
 
     if ! check_gas ; then
@@ -5395,10 +5493,8 @@ if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
             $nogas "GNU assembler not found, install/update gas-preprocessor"
     fi
 
-    check_as <<EOF && enable as_func
-.func test
-.endfunc
-EOF
+    check_as as_func ".func test
+                      .endfunc"
 fi
 
 check_inline_asm inline_asm_labels '"1:\n"'
@@ -5419,22 +5515,20 @@ elif enabled alpha; then
 
 elif enabled arm; then
 
-    enabled msvc && check_cpp_condition stddef.h "defined _M_ARMT" && enable thumb
-
-    check_cpp_condition stddef.h "defined __thumb__" && check_cc <<EOF && enable_weak thumb
+    enabled msvc && check_cpp_condition thumb stddef.h "defined _M_ARMT"
+    test_cpp_condition stddef.h "defined __thumb__" && test_cc <<EOF && enable_weak thumb
 float func(float a, float b){ return a+b; }
 EOF
-
     enabled thumb && check_cflags -mthumb || check_cflags -marm
 
-    if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
-        enable vfp_args
-    elif check_cpp_condition stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
-        enable vfp_args
-    elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
+    if check_cpp_condition vfp_args stddef.h "defined __ARM_PCS_VFP"; then
+        :
+    elif check_cpp_condition vfp_args stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
+        :
+    elif ! test_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
         case "${cross_prefix:-$cc}" in
-            *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
-            *) check_ld "cc" <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
+            *hardfloat*) enable vfp_args; fpabi=vfp ;;
+            *) check_ld "cc" vfp_args <<EOF && fpabi=vfp || fpabi=soft ;;
 __asm__ (".eabi_attribute 28, 1");
 int main(void) { return 0; }
 EOF
@@ -5456,18 +5550,13 @@ EOF
 
     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
 
-    check_as <<EOF && enable as_arch_directive
-.arch armv7-a
-EOF
-    check_as <<EOF && enable as_fpu_directive
-.fpu neon
-EOF
+    check_as as_arch_directive ".arch armv7-a"
+    check_as as_dn_directive   "ra .dn d0.i16"
+    check_as as_fpu_directive  ".fpu neon"
 
     # llvm's integrated assembler supports .object_arch from llvm 3.5
     [ "$objformat" = elf32 ] || [ "$objformat" = elf64 ] &&
-        check_as <<EOF && enable as_object_arch
-.object_arch armv4
-EOF
+        check_as as_object_arch ".object_arch armv4"
 
     # MS armasm fails to assemble our PIC constructs
     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
@@ -5521,23 +5610,21 @@ elif enabled ppc; then
         check_cflags -maltivec -mabi=altivec
 
         # check if our compiler supports Motorola AltiVec C API
-        check_code cc altivec.h "vector signed int v1 = (vector signed int) { 0 };
-                                 vector signed int v2 = (vector signed int) { 1 };
-                                 v1 = vec_add(v1, v2);" ||
-            disable altivec
+        check_cc altivec altivec.h "vector signed int v1 = (vector signed int) { 0 };
+                                    vector signed int v2 = (vector signed int) { 1 };
+                                    v1 = vec_add(v1, v2);"
 
         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
     fi
 
     if enabled vsx; then
         check_cflags -mvsx &&
-        check_code cc altivec.h "int v[4] = { 0 };
-                                 vector signed int v1 = vec_vsx_ld(0, v);" ||
-            disable vsx
+        check_cc vsx altivec.h "int v[4] = { 0 };
+                                vector signed int v1 = vec_vsx_ld(0, v);"
     fi
 
     if enabled power8; then
-        check_cpp_condition "altivec.h" "defined(_ARCH_PWR8)" || disable power8
+        check_cpp_condition power8 "altivec.h" "defined(_ARCH_PWR8)"
     fi
 
 elif enabled x86; then
@@ -5573,20 +5660,20 @@ EOF
 
     probe_x86asm(){
         x86asmexe_probe=$1
-        if check_cmd $x86asmexe_probe -v; then
+        if test_cmd $x86asmexe_probe -v; then
             x86asmexe=$x86asmexe_probe
             x86asm_type=nasm
             x86asm_debug="-g -F dwarf"
             X86ASMDEP=
             X86ASM_DEPFLAGS='-MD $(@:.o=.d)'
-        elif check_cmd $x86asmexe_probe --version; then
+        elif test_cmd $x86asmexe_probe --version; then
             x86asmexe=$x86asmexe_probe
             x86asm_type=yasm
             x86asm_debug="-g dwarf2"
             X86ASMDEP='$(DEPX86ASM) $(X86ASMFLAGS) -M $(X86ASM_O) $< > $(@:.o=.d)'
             X86ASM_DEPFLAGS=
         fi
-        check_x86asm "movbe ecx, [5]" && enable x86asm
+        check_x86asm x86asm "movbe ecx, [5]"
     }
 
     if ! disabled_any asm mmx x86asm; then
@@ -5602,11 +5689,11 @@ EOF
             elf*) enabled debug && append X86ASMFLAGS $x86asm_debug ;;
         esac
 
-        check_x86asm "vmovdqa32 [eax]{k1}{z}, zmm0"    || disable avx512_external
-        check_x86asm "vextracti128 xmm0, ymm0, 0"      || disable avx2_external
-        check_x86asm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
-        check_x86asm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
-        check_x86asm "CPU amdnop" || disable cpunop
+        check_x86asm avx512_external "vmovdqa32 [eax]{k1}{z}, zmm0"
+        check_x86asm avx2_external   "vextracti128 xmm0, ymm0, 0"
+        check_x86asm xop_external    "vpmacsdd xmm0, xmm1, xmm2, xmm3"
+        check_x86asm fma4_external   "vfmaddps ymm0, ymm1, ymm2, ymm3"
+        check_x86asm cpunop          "CPU amdnop"
     fi
 
     case "$cpu" in
@@ -5617,7 +5704,7 @@ EOF
 
 fi
 
-check_code cc arm_neon.h "int16x8_t test = vdupq_n_s16(0)" && enable intrinsics_neon
+check_cc intrinsics_neon arm_neon.h "int16x8_t test = vdupq_n_s16(0)"
 
 check_ldflags -Wl,--as-needed
 check_ldflags -Wl,-z,noexecstack
@@ -5727,7 +5814,7 @@ check_func_headers windows.h Sleep
 check_func_headers windows.h VirtualAlloc
 check_func_headers glob.h glob
 enabled xlib &&
-    check_func_headers "X11/Xlib.h X11/extensions/Xvlib.h" XvGetPortAttribute -lXv -lX11 -lXext
+    check_lib xlib "X11/Xlib.h X11/extensions/Xvlib.h" XvGetPortAttribute -lXv -lX11 -lXext
 
 check_header direct.h
 check_header dirent.h
@@ -5735,6 +5822,7 @@ check_header dxgidebug.h
 check_header dxva.h
 check_header dxva2api.h -D_WIN32_WINNT=0x0600
 check_header io.h
+check_header linux/perf_event.h
 check_header libcrystalhd/libcrystalhd_if.h
 check_header malloc.h
 check_header net/udplite.h
@@ -5755,12 +5843,13 @@ check_header asm/types.h
 # it seems there are versions of clang in some distros that try to use the
 # gcc headers, which explodes for stdatomic
 # so we also check that atomics actually work here
-check_builtin stdatomic stdatomic.h "atomic_int foo, bar = ATOMIC_VAR_INIT(-1); atomic_store(&foo, 0)"
+check_builtin stdatomic stdatomic.h "atomic_int foo, bar = ATOMIC_VAR_INIT(-1); atomic_store(&foo, 0); foo += bar"
 
 check_lib advapi32 "windows.h"            RegCloseKey          -ladvapi32
+check_lib bcrypt   "windows.h bcrypt.h"   BCryptGenRandom      -lbcrypt &&
+    check_cpp_condition bcrypt bcrypt.h "defined BCRYPT_RNG_ALGORITHM"
 check_lib ole32    "windows.h"            CoTaskMemFree        -lole32
 check_lib shell32  "windows.h shellapi.h" CommandLineToArgvW   -lshell32
-check_lib wincrypt "windows.h wincrypt.h" CryptGenRandom       -ladvapi32
 check_lib psapi    "windows.h psapi.h"    GetProcessMemoryInfo -lpsapi
 
 check_lib android android/native_window.h ANativeWindow_acquire -landroid
@@ -5809,15 +5898,18 @@ check_type "va/va.h va/va_enc_vp9.h"  "VAEncPictureParameterBufferVP9"
 check_type "vdpau/vdpau.h" "VdpPictureInfoHEVC"
 
 if ! disabled ffnvcodec; then
-    check_pkg_config ffnvcodec "ffnvcodec >= 8.0.14.1" \
-        "ffnvcodec/nvEncodeAPI.h ffnvcodec/dynlink_cuda.h ffnvcodec/dynlink_cuviddec.h ffnvcodec/dynlink_nvcuvid.h" ""
+    check_pkg_config ffnvcodec "ffnvcodec >= 8.1.24.2" \
+          "ffnvcodec/nvEncodeAPI.h ffnvcodec/dynlink_cuda.h ffnvcodec/dynlink_cuviddec.h ffnvcodec/dynlink_nvcuvid.h" "" || \
+        { test_pkg_config ffnvcodec_tmp "ffnvcodec < 8.1" "" "" && check_pkg_config ffnvcodec "ffnvcodec >= 8.0.14.2" \
+          "ffnvcodec/nvEncodeAPI.h ffnvcodec/dynlink_cuda.h ffnvcodec/dynlink_cuviddec.h ffnvcodec/dynlink_nvcuvid.h" ""; }
 fi
 
-check_cpp_condition windows.h "!WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)" && enable winrt || disable winrt
+check_cpp_condition winrt windows.h "!WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)"
 
 if ! disabled w32threads && ! enabled pthreads; then
     check_func_headers "windows.h process.h" _beginthreadex &&
         check_type "windows.h" CONDITION_VARIABLE &&
+        check_type "windows.h" INIT_ONCE &&
         enable w32threads || disable w32threads
     if ! enabled w32threads && enabled winrt; then
         check_func_headers "windows.h" CreateThread &&
@@ -5846,7 +5938,7 @@ if ! disabled pthreads && ! enabled w32threads && ! enabled os2threads; then
     elif check_func pthread_join && check_func pthread_create; then
         enable pthreads
     fi
-    check_code cc "pthread.h" "static pthread_mutex_t atomic_lock = PTHREAD_MUTEX_INITIALIZER" || disable pthreads
+    check_cc pthreads "pthread.h" "static pthread_mutex_t atomic_lock = PTHREAD_MUTEX_INITIALIZER"
 
     if enabled pthreads; then
         check_builtin sem_timedwait semaphore.h "sem_t *s; sem_init(s,0,0); sem_timedwait(s,0); sem_destroy(s)" $pthreads_extralibs
@@ -5854,7 +5946,8 @@ if ! disabled pthreads && ! enabled w32threads && ! enabled os2threads; then
     fi
 fi
 
-enabled  zlib && check_lib zlib   zlib.h      zlibVersion    -lz
+enabled  zlib && { check_pkg_config zlib zlib "zlib.h" zlibVersion ||
+                   check_lib zlib   zlib.h      zlibVersion    -lz; }
 enabled bzlib && check_lib bzlib bzlib.h BZ2_bzlibVersion    -lbz2
 enabled  lzma && check_lib lzma   lzma.h lzma_version_number -llzma
 
@@ -5881,14 +5974,15 @@ done
 enabled cuda_sdk          && require cuda_sdk cuda.h cuCtxCreate -lcuda
 enabled chromaprint       && require chromaprint chromaprint.h chromaprint_get_version -lchromaprint
 enabled decklink          && { require_header DeckLinkAPI.h &&
-                               { check_cpp_condition DeckLinkAPIVersion.h "BLACKMAGIC_DECKLINK_API_VERSION >= 0x0a060100" || die "ERROR: Decklink API version must be >= 10.6.1."; } }
+                               { test_cpp_condition DeckLinkAPIVersion.h "BLACKMAGIC_DECKLINK_API_VERSION >= 0x0a060100" || die "ERROR: Decklink API version must be >= 10.6.1."; } }
 enabled libndi_newtek     && require_header Processing.NDI.Lib.h
 enabled frei0r            && require_header frei0r.h
 enabled gmp               && require gmp gmp.h mpz_export -lgmp
 enabled gnutls            && require_pkg_config gnutls gnutls gnutls/gnutls.h gnutls_global_init
 enabled jni               && { [ $target_os = "android" ] && check_header jni.h && enabled pthreads || die "ERROR: jni not found"; }
 enabled ladspa            && require_header ladspa.h
-enabled lv2               && require_pkg_config lv2 lilv-0 "lilv-0/lilv/lilv.h" lilv_world_new
+enabled libaom            && require_pkg_config libaom "aom >= 0.1.0" aom/aom_codec.h aom_codec_version
+enabled lv2               && require_pkg_config lv2 lilv-0 "lilv/lilv.h" lilv_world_new
 enabled libiec61883       && require libiec61883 libiec61883/iec61883.h iec61883_cmp_connect -lraw1394 -lavc1394 -lrom1394 -liec61883
 enabled libass            && require_pkg_config libass libass ass/ass.h ass_library_init
 enabled libbluray         && require_pkg_config libbluray libbluray libbluray/bluray.h bd_open
@@ -5926,7 +6020,8 @@ enabled libmfx            && { check_pkg_config libmfx libmfx "mfx/mfxvideo.h" M
                                { require libmfx "mfx/mfxvideo.h" MFXInit "-llibmfx $advapi32_extralibs" && warn "using libmfx without pkg-config"; } }
 enabled libmodplug        && require_pkg_config libmodplug libmodplug libmodplug/modplug.h ModPlug_Load
 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame $libm_extralibs
-enabled libmysofa         && require libmysofa "mysofa.h" mysofa_load -lmysofa $zlib_extralibs
+enabled libmysofa         && { check_pkg_config libmysofa libmysofa mysofa.h mysofa_load ||
+                               require libmysofa mysofa.h mysofa_load -lmysofa $zlib_extralibs; }
 enabled libnpp            && { check_lib libnpp npp.h nppGetLibVersion -lnppig -lnppicc -lnppc ||
                                check_lib libnpp npp.h nppGetLibVersion -lnppi -lnppc ||
                                die "ERROR: libnpp not found"; }
@@ -5959,6 +6054,7 @@ enabled libsnappy         && require libsnappy snappy-c.h snappy_compress -lsnap
 enabled libsoxr           && require libsoxr soxr.h soxr_create -lsoxr
 enabled libssh            && require_pkg_config libssh libssh libssh/sftp.h sftp_init
 enabled libspeex          && require_pkg_config libspeex speex speex/speex.h speex_decoder_init
+enabled libsrt            && require_pkg_config libsrt "srt >= 1.2.0" srt/srt.h srt_socket
 enabled libtesseract      && require_pkg_config libtesseract tesseract tesseract/capi.h TessBaseAPICreate
 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
 enabled libtls            && require_pkg_config libtls libtls tls.h tls_configure
@@ -6004,8 +6100,7 @@ enabled libx264           && { check_pkg_config libx264 x264 "stdint.h x264.h" x
                                { require libx264 "stdint.h x264.h" x264_encoder_encode "-lx264 $pthreads_extralibs $libm_extralibs" &&
                                  warn "using libx264 without pkg-config"; } } &&
                              require_cpp_condition x264.h "X264_BUILD >= 118" &&
-                             { check_cpp_condition x264.h "X264_MPEG2" &&
-                               enable libx262; }
+                             check_cpp_condition libx262 x264.h "X264_MPEG2"
 enabled libx265           && require_pkg_config libx265 x265 x265.h x265_api_get &&
                              require_cpp_condition x265.h "X265_BUILD >= 68"
 enabled libxavs           && require libxavs "stdint.h xavs.h" xavs_encoder_encode "-lxavs $pthreads_extralibs $libm_extralibs"
@@ -6013,9 +6108,13 @@ enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
 enabled libzimg           && require_pkg_config libzimg "zimg >= 2.7.0" zimg.h zimg_get_api_version
 enabled libzmq            && require_pkg_config libzmq libzmq zmq.h zmq_ctx_new
 enabled libzvbi           && require_pkg_config libzvbi zvbi-0.2 libzvbi.h vbi_decoder_new &&
-                             { check_cpp_condition libzvbi.h "VBI_VERSION_MAJOR > 0 || VBI_VERSION_MINOR > 2 || VBI_VERSION_MINOR == 2 && VBI_VERSION_MICRO >= 28" ||
+                             { test_cpp_condition libzvbi.h "VBI_VERSION_MAJOR > 0 || VBI_VERSION_MINOR > 2 || VBI_VERSION_MINOR == 2 && VBI_VERSION_MICRO >= 28" ||
                                enabled gpl || die "ERROR: libzvbi requires version 0.2.28 or --enable-gpl."; }
 enabled libxml2           && require_pkg_config libxml2 libxml-2.0 libxml2/libxml/xmlversion.h xmlCheckVersion
+enabled mbedtls           && { check_pkg_config mbedtls mbedtls mbedtls/x509_crt.h mbedtls_x509_crt_init ||
+                               check_pkg_config mbedtls mbedtls mbedtls/ssl.h mbedtls_ssl_init ||
+                               check_lib mbedtls mbedtls/ssl.h mbedtls_ssl_init -lmbedtls -lmbedx509 -lmbedcrypto ||
+                               die "ERROR: mbedTLS not found"; }
 enabled mediacodec        && { enabled jni || die "ERROR: mediacodec requires --enable-jni"; }
 enabled mmal              && { check_lib mmal interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ||
                                { ! enabled cross_compile &&
@@ -6027,13 +6126,13 @@ enabled mmal              && { check_lib mmal interface/mmal/mmal.h mmal_port_co
 enabled openal            && { { for al_extralibs in "${OPENAL_LIBS}" "-lopenal" "-lOpenAL32"; do
                                check_lib openal 'AL/al.h' alGetError "${al_extralibs}" && break; done } ||
                                die "ERROR: openal not found"; } &&
-                             { check_cpp_condition "AL/al.h" "defined(AL_VERSION_1_1)" ||
+                             { test_cpp_condition "AL/al.h" "defined(AL_VERSION_1_1)" ||
                                die "ERROR: openal must be installed and version must be 1.1 or compatible"; }
 enabled opencl            && { check_lib opencl OpenCL/cl.h clEnqueueNDRangeKernel -Wl,-framework,OpenCL ||
                                check_lib opencl CL/cl.h clEnqueueNDRangeKernel -lOpenCL ||
                                die "ERROR: opencl not found"; } &&
-                             { check_cpp_condition "OpenCL/cl.h" "defined(CL_VERSION_1_2)" ||
-                               check_cpp_condition "CL/cl.h" "defined(CL_VERSION_1_2)" ||
+                             { test_cpp_condition "OpenCL/cl.h" "defined(CL_VERSION_1_2)" ||
+                               test_cpp_condition "CL/cl.h" "defined(CL_VERSION_1_2)" ||
                                die "ERROR: opencl must be installed and version must be 1.2 or compatible"; }
 enabled opengl            && { check_lib opengl GL/glx.h glXGetProcAddress "-lGL" ||
                                check_lib opengl windows.h wglGetProcAddress "-lopengl32 -lgdi32" ||
@@ -6056,6 +6155,8 @@ enabled rkmpp             && { require_pkg_config rkmpp rockchip_mpp  rockchip/r
                                { enabled libdrm ||
                                  die "ERROR: rkmpp requires --enable-libdrm"; }
                              }
+enabled vapoursynth       && require_pkg_config vapoursynth "vapoursynth-script >= 42" VSScript.h vsscript_init
+
 
 if enabled gcrypt; then
     GCRYPT_CONFIG="${cross_prefix}libgcrypt-config"
@@ -6076,8 +6177,8 @@ if enabled sdl2; then
     if disabled sdl2 && "${SDL2_CONFIG}" --version > /dev/null 2>&1; then
         sdl2_cflags=$("${SDL2_CONFIG}" --cflags)
         sdl2_extralibs=$("${SDL2_CONFIG}" --libs)
-        check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x020001" $sdl2_cflags &&
-        check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x020100" $sdl2_cflags &&
+        test_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x020001" $sdl2_cflags &&
+        test_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x020100" $sdl2_cflags &&
         check_func_headers SDL_events.h SDL_PollEvent $sdl2_extralibs $sdl2_cflags &&
             enable sdl2
     fi
@@ -6105,7 +6206,7 @@ enabled securetransport &&
 
 enabled schannel &&
     check_func_headers "windows.h security.h" InitializeSecurityContext -DSECURITY_WIN32 -lsecur32 &&
-    check_cpp_condition winerror.h "defined(SEC_I_CONTEXT_EXPIRED)" &&
+    test_cpp_condition winerror.h "defined(SEC_I_CONTEXT_EXPIRED)" &&
     schannel_extralibs="-lsecur32" ||
         disable schannel
 
@@ -6121,26 +6222,26 @@ rsync --help 2> /dev/null | grep -q 'contimeout' && enable rsync_contimeout || d
 # check V4L2 codecs available in the API
 check_header linux/fb.h
 check_header linux/videodev2.h
-check_code cc linux/videodev2.h "struct v4l2_frmsizeenum vfse; vfse.discrete.width = 0;" && enable_sanitized struct_v4l2_frmivalenum_discrete
-check_code cc linux/videodev2.h "int i = V4L2_CAP_VIDEO_M2M_MPLANE | V4L2_CAP_VIDEO_M2M | V4L2_BUF_FLAG_LAST;" || disable v4l2_m2m
-check_code cc linux/videodev2.h "int i = V4L2_PIX_FMT_VC1_ANNEX_G;" && enable vc1_v4l2_m2m
-check_code cc linux/videodev2.h "int i = V4L2_PIX_FMT_MPEG1;" && enable mpeg1_v4l2_m2m
-check_code cc linux/videodev2.h "int i = V4L2_PIX_FMT_MPEG2;" && enable mpeg2_v4l2_m2m
-check_code cc linux/videodev2.h "int i = V4L2_PIX_FMT_MPEG4;" && enable mpeg4_v4l2_m2m
-check_code cc linux/videodev2.h "int i = V4L2_PIX_FMT_HEVC;" && enable hevc_v4l2_m2m
-check_code cc linux/videodev2.h "int i = V4L2_PIX_FMT_H263;" && enable h263_v4l2_m2m
-check_code cc linux/videodev2.h "int i = V4L2_PIX_FMT_H264;" && enable h264_v4l2_m2m
-check_code cc linux/videodev2.h "int i = V4L2_PIX_FMT_VP8;" && enable vp8_v4l2_m2m
-check_code cc linux/videodev2.h "int i = V4L2_PIX_FMT_VP9;" && enable vp9_v4l2_m2m
+test_code cc linux/videodev2.h "struct v4l2_frmsizeenum vfse; vfse.discrete.width = 0;" && enable_sanitized struct_v4l2_frmivalenum_discrete
+check_cc v4l2_m2m linux/videodev2.h "int i = V4L2_CAP_VIDEO_M2M_MPLANE | V4L2_CAP_VIDEO_M2M | V4L2_BUF_FLAG_LAST;"
+check_cc vc1_v4l2_m2m linux/videodev2.h "int i = V4L2_PIX_FMT_VC1_ANNEX_G;"
+check_cc mpeg1_v4l2_m2m linux/videodev2.h "int i = V4L2_PIX_FMT_MPEG1;"
+check_cc mpeg2_v4l2_m2m linux/videodev2.h "int i = V4L2_PIX_FMT_MPEG2;"
+check_cc mpeg4_v4l2_m2m linux/videodev2.h "int i = V4L2_PIX_FMT_MPEG4;"
+check_cc hevc_v4l2_m2m linux/videodev2.h "int i = V4L2_PIX_FMT_HEVC;"
+check_cc h263_v4l2_m2m linux/videodev2.h "int i = V4L2_PIX_FMT_H263;"
+check_cc h264_v4l2_m2m linux/videodev2.h "int i = V4L2_PIX_FMT_H264;"
+check_cc vp8_v4l2_m2m linux/videodev2.h "int i = V4L2_PIX_FMT_VP8;"
+check_cc vp9_v4l2_m2m linux/videodev2.h "int i = V4L2_PIX_FMT_VP9;"
 
 check_header sys/videoio.h
-check_code cc sys/videoio.h "struct v4l2_frmsizeenum vfse; vfse.discrete.width = 0;" && enable_sanitized struct_v4l2_frmivalenum_discrete
+test_code cc sys/videoio.h "struct v4l2_frmsizeenum vfse; vfse.discrete.width = 0;" && enable_sanitized struct_v4l2_frmivalenum_discrete
 
 check_lib user32 "windows.h winuser.h" GetShellWindow -luser32
 check_lib vfw32 "windows.h vfw.h" capCreateCaptureWindow -lvfw32
 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
 # w32api 3.12 had it defined wrong
-check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
+check_cpp_condition vfwcap_defines vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER"
 
 check_type "dshow.h" IBaseFilter
 
@@ -6153,7 +6254,7 @@ check_header "dev/bktr/ioctl_meteor.h dev/bktr/ioctl_bt848.h"
 if check_struct sys/soundcard.h audio_buf_info bytes; then
     enable_sanitized sys/soundcard.h
 else
-    check_cc -D__BSD_VISIBLE -D__XSI_VISIBLE <<EOF && add_cppflags -D__BSD_VISIBLE -D__XSI_VISIBLE && enable_sanitized sys/soundcard.h
+    test_cc -D__BSD_VISIBLE -D__XSI_VISIBLE <<EOF && add_cppflags -D__BSD_VISIBLE -D__XSI_VISIBLE && enable_sanitized sys/soundcard.h
     #include <sys/soundcard.h>
     audio_buf_info abc;
 EOF
@@ -6188,7 +6289,7 @@ check_func_headers "windows.h" CreateDIBSection "$gdigrab_indev_extralibs"
 
 # d3d11va requires linking directly to dxgi and d3d11 if not building for
 # the desktop api partition
-check_cpp <<EOF && enable uwp && d3d11va_extralibs="-ldxgi -ld3d11"
+test_cpp <<EOF && enable uwp && d3d11va_extralibs="-ldxgi -ld3d11"
 #ifdef WINAPI_FAMILY
 #include <winapifamily.h>
 #if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
@@ -6205,22 +6306,25 @@ enabled vaapi &&
     check_lib vaapi va/va.h vaInitialize -lva
 
 enabled vaapi &&
-    check_code cc "va/va.h" "vaCreateSurfaces(0, 0, 0, 0, 0, 0, 0, 0)" ||
-    disable vaapi
+    check_cc vaapi "va/va.h" "vaCreateSurfaces(0, 0, 0, 0, 0, 0, 0, 0)"
 
-enabled vaapi &&
+if enabled vaapi; then
     check_lib vaapi_drm "va/va.h va/va_drm.h" vaGetDisplayDRM -lva -lva-drm
-
-enabled vaapi &&
     check_lib vaapi_x11 "va/va.h va/va_x11.h" vaGetDisplay -lva -lva-x11 -lX11
+fi
 
 enabled vaapi &&
-    check_cpp_condition "va/va.h" "VA_CHECK_VERSION(1, 0, 0)" &&
-    enable vaapi_1
+    check_cpp_condition vaapi_1 "va/va.h" "VA_CHECK_VERSION(1, 0, 0)"
 
-if enabled_all opencl vaapi ; then
+if enabled_all opencl libdrm ; then
     check_type "CL/cl_intel.h" "clCreateImageFromFdINTEL_fn" &&
-        enable opencl_vaapi_beignet
+        enable opencl_drm_beignet
+    check_func_headers "CL/cl_ext.h" clImportMemoryARM &&
+        enable opencl_drm_arm
+fi
+
+if enabled_all opencl vaapi ; then
+    enabled opencl_drm_beignet && enable opencl_vaapi_beignet
     if enabled libmfx ; then
         check_type "CL/cl.h CL/va_ext.h" "clCreateFromVA_APIMediaSurfaceINTEL_fn" &&
             enable opencl_vaapi_intel_media
@@ -6237,14 +6341,8 @@ if enabled_all opencl d3d11va ; then
         enable opencl_d3d11
 fi
 
-if enabled_all opencl libdrm ; then
-    check_func_headers "CL/cl_ext.h" clImportMemoryARM &&
-        enable opencl_drm_arm
-fi
-
 enabled vdpau &&
-    check_cpp_condition vdpau/vdpau.h "defined VDP_DECODER_PROFILE_MPEG4_PART2_ASP" ||
-    disable vdpau
+    check_cpp_condition vdpau vdpau/vdpau.h "defined VDP_DECODER_PROFILE_MPEG4_PART2_ASP"
 
 enabled vdpau &&
     check_lib vdpau_x11 "vdpau/vdpau.h vdpau/vdpau_x11.h" vdp_device_create_x11 -lvdpau -lX11
@@ -6266,7 +6364,7 @@ fi
 enabled ffnvcodec && enable cuda
 
 enabled nvenc &&
-    check_cc -I$source_path <<EOF || disable nvenc
+    test_cc -I$source_path <<EOF || disable nvenc
 #include <ffnvcodec/nvEncodeAPI.h>
 NV_ENCODE_API_FUNCTION_LIST flist;
 void f(void) { struct { const GUID guid; } s[] = { { NV_ENC_PRESET_HQ_GUID } }; }
@@ -6274,9 +6372,8 @@ int main(void) { return 0; }
 EOF
 
 enabled amf &&
-    check_cpp_condition "AMF/core/Version.h" \
-        "(AMF_VERSION_MAJOR << 48 | AMF_VERSION_MINOR << 32 | AMF_VERSION_RELEASE << 16 | AMF_VERSION_BUILD_NUM) >= 0x0001000400040001" ||
-    disable amf
+    check_cpp_condition amf "AMF/core/Version.h" \
+        "(AMF_VERSION_MAJOR << 48 | AMF_VERSION_MINOR << 32 | AMF_VERSION_RELEASE << 16 | AMF_VERSION_BUILD_NUM) >= 0x0001000400040001"
 
 # Funny iconv installations are not unusual, so check it after all flags have been set
 if enabled libc_iconv; then
@@ -6332,7 +6429,7 @@ check_disable_warning_headers(){
 check_disable_warning_headers -Wno-deprecated-declarations
 check_disable_warning_headers -Wno-unused-variable
 
-check_cc <<EOF && enable blocks_extension
+test_cc <<EOF && enable blocks_extension
 void (^block)(void);
 EOF
 
@@ -6378,7 +6475,7 @@ enabled xmm_clobber_test &&
                   -Wl,--wrap,sws_scale ||
     disable xmm_clobber_test
 
-check_ld "cc" <<EOF && enable proper_dce
+check_ld "cc" proper_dce <<EOF
 extern const int array[512];
 static inline int func(void) { return array[0]; }
 int main(void) { return 0; }
@@ -6389,11 +6486,11 @@ if enabled proper_dce; then
     if test_ldflags -Wl,${version_script},$TMPV; then
         append SHFLAGS '-Wl,${version_script},\$(SUBDIR)lib\$(NAME).ver'
         quotes='""'
-        check_cc <<EOF && enable symver_asm_label
+        test_cc <<EOF && enable symver_asm_label
 void ff_foo(void) __asm__ ("av_foo@VERSION");
 void ff_foo(void) { ${inline_asm+__asm__($quotes);} }
 EOF
-        check_cc <<EOF && enable symver_gnu_asm
+        test_cc <<EOF && enable symver_gnu_asm
 __asm__(".symver ff_foo,av_foo@VERSION");
 void ff_foo(void) {}
 EOF
@@ -6438,7 +6535,7 @@ fi
 
 enabled ftrapv && check_cflags -ftrapv
 
-check_cc -mno-red-zone <<EOF && noredzone_flags="-mno-red-zone"
+test_cc -mno-red-zone <<EOF && noredzone_flags="-mno-red-zone"
 int x;
 EOF
 
@@ -6480,11 +6577,39 @@ elif enabled gcc; then
     check_cflags -Wformat
     check_cflags -fdiagnostics-color=auto
     enabled extra_warnings || check_disable_warning -Wno-maybe-uninitialized
+    if enabled x86_32; then
+        case $target_os in
+        *bsd*)
+            # BSDs don't guarantee a 16 byte aligned stack, but we can
+            # request GCC to try to maintain 16 byte alignment throughout
+            # function calls. Library entry points that might call assembly
+            # functions align the stack. (The parameter means 2^4 bytes.)
+            check_cflags -mpreferred-stack-boundary=4
+            ;;
+        esac
+    fi
 elif enabled llvm_gcc; then
     check_cflags -mllvm -stack-alignment=16
 elif enabled clang; then
-    check_cflags -mllvm -stack-alignment=16
-    check_cflags -mstack-alignment=16
+    if enabled x86_32; then
+        # Clang doesn't support maintaining alignment without assuming the
+        # same alignment in every function. If 16 byte alignment would be
+        # enabled, one would also have to either add attribute_align_arg on
+        # every single entry point into the libraries or enable -mstackrealign
+        # (doing stack realignment in every single function).
+        case $target_os in
+        mingw32|win32|*bsd*)
+            disable aligned_stack
+            ;;
+        *)
+            check_cflags -mllvm -stack-alignment=16
+            check_cflags -mstack-alignment=16
+            ;;
+        esac
+    else
+        check_cflags -mllvm -stack-alignment=16
+        check_cflags -mstack-alignment=16
+    fi
     check_cflags -Qunused-arguments
     check_cflags -Werror=implicit-function-declaration
     check_cflags -Werror=missing-prototypes
@@ -6513,7 +6638,7 @@ elif enabled_any msvc icl; then
     if enabled icl; then
         # -Qansi-alias is basically -fstrict-aliasing, but does not work
         # (correctly) on icl 13.x.
-        check_cpp_condition "windows.h" "__ICL < 1300 || __ICL >= 1400" &&
+        test_cpp_condition "windows.h" "__ICL < 1300 || __ICL >= 1400" &&
             add_cflags -Qansi-alias
         # Some inline asm is not compilable in debug
         if enabled debug; then
@@ -6522,7 +6647,7 @@ elif enabled_any msvc icl; then
         fi
     fi
     # msvcrt10 x64 incorrectly enables log2, only msvcrt12 (MSVC 2013) onwards actually has log2.
-    check_cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION >= 12" || disable log2
+    check_cpp_condition log2 crtversion.h "_VC_CRT_MAJOR_VERSION >= 12"
     # The CRT headers contain __declspec(restrict) in a few places, but if redefining
     # restrict, this might break. MSVC 2010 and 2012 fail with __declspec(__restrict)
     # (as it ends up if the restrict redefine is done before including stdlib.h), while
@@ -6530,16 +6655,16 @@ elif enabled_any msvc icl; then
     # If this declspec fails, force including stdlib.h before the restrict redefinition
     # happens in config.h.
     if [ $restrict_keyword != restrict ]; then
-        check_cc <<EOF || add_cflags -FIstdlib.h
+        test_cc <<EOF || add_cflags -FIstdlib.h
 __declspec($restrict_keyword) void *foo(int);
 EOF
     fi
     # the new SSA optimzer in VS2015 U3 is mis-optimizing some parts of the code
     # Issue has been fixed in MSVC v19.00.24218.
-    check_cpp_condition windows.h "_MSC_FULL_VER >= 190024218" ||
+    test_cpp_condition windows.h "_MSC_FULL_VER >= 190024218" ||
         check_cflags -d2SSAOptimizer-
     # enable utf-8 source processing on VS2015 U2 and newer
-    check_cpp_condition windows.h "_MSC_FULL_VER >= 190023918" &&
+    test_cpp_condition windows.h "_MSC_FULL_VER >= 190023918" &&
         add_cflags -utf-8
 fi
 
@@ -6547,7 +6672,7 @@ for pfx in "" host_; do
     varname=${pfx%_}cc_type
     eval "type=\$$varname"
     if [ "$type" = "msvc" ]; then
-        check_${pfx}cc <<EOF || add_${pfx}cflags -Dinline=__inline
+        test_${pfx}cc <<EOF || add_${pfx}cflags -Dinline=__inline
 static inline int foo(int a) { return a; }
 EOF
     fi
@@ -6689,6 +6814,7 @@ enabled signature_filter    && prepend avfilter_deps "avcodec avformat"
 enabled smartblur_filter    && prepend avfilter_deps "swscale"
 enabled spectrumsynth_filter && prepend avfilter_deps "avcodec"
 enabled spp_filter          && prepend avfilter_deps "avcodec"
+enabled srcnn_filter        && prepend avfilter_deps "avformat"
 enabled subtitles_filter    && prepend avfilter_deps "avformat avcodec"
 enabled uspp_filter         && prepend avfilter_deps "avcodec"
 enabled zoompan_filter      && prepend avfilter_deps "swscale"
@@ -7065,6 +7191,10 @@ echo "#endif /* AVUTIL_AVCONFIG_H */" >> $TMPH
 
 cp_if_changed $TMPH libavutil/avconfig.h
 
+full_filter_name(){
+    sed -n "s/^extern AVFilter ff_\([avfsinkrc]\{2,5\}\)_$1;/\1_$1/p" $source_path/libavfilter/allfilters.c
+}
+
 # generate the lists of enabled components
 print_enabled_components(){
     file=$1
@@ -7075,6 +7205,9 @@ print_enabled_components(){
     for c in $*; do
         if enabled $c; then
             case $name in
+                filter_list)
+                    c=$(full_filter_name $(remove_suffix _filter $c))
+                ;;
                 indev_list)
                     c=$(add_suffix _demuxer $(remove_suffix _indev $c))
                 ;;
@@ -7085,17 +7218,23 @@ print_enabled_components(){
             printf "    &ff_%s,\n" $c >> $TMPH
         fi
     done
+    if [ "$name" = "filter_list" ]; then
+        for c in asrc_abuffer vsrc_buffer asink_abuffer vsink_buffer; do
+            printf "    &ff_%s,\n" $c >> $TMPH
+        done
+    fi
     echo "    NULL };" >> $TMPH
     cp_if_changed $TMPH $file
 }
 
+print_enabled_components libavfilter/filter_list.c AVFilter filter_list $FILTER_LIST
 print_enabled_components libavcodec/codec_list.c AVCodec codec_list $CODEC_LIST
 print_enabled_components libavcodec/parser_list.c AVCodecParser parser_list $PARSER_LIST
 print_enabled_components libavcodec/bsf_list.c AVBitStreamFilter bitstream_filters $BSF_LIST
-print_enabled_components libavdevice/indev_list.c AVInputFormat indev_list $INDEV_LIST
-print_enabled_components libavdevice/outdev_list.c AVOutputFormat outdev_list $OUTDEV_LIST
 print_enabled_components libavformat/demuxer_list.c AVInputFormat demuxer_list $DEMUXER_LIST
 print_enabled_components libavformat/muxer_list.c AVOutputFormat muxer_list $MUXER_LIST
+print_enabled_components libavdevice/indev_list.c AVInputFormat indev_list $INDEV_LIST
+print_enabled_components libavdevice/outdev_list.c AVOutputFormat outdev_list $OUTDEV_LIST
 print_enabled_components libavformat/protocol_list.c URLProtocol url_protocols $PROTOCOL_LIST
 
 # Settings for pkg-config files