configure

libx264rgb_encoder_select="libx264_encoder"
libx265_encoder_deps="libx265"
libxavs_encoder_deps="libxavs"
libxvid_encoder_deps="libxvid"
libzvbi_teletext_decoder_deps="libzvbi"
videotoolbox_suggest="coreservices"
videotoolbox_deps="corefoundation coremedia corevideo"
videotoolbox_encoder_deps="videotoolbox VTCompressionSessionPrepareToEncodeFrames"

# demuxers / muxers
ac3_demuxer_select="ac3_parser"
aiff_muxer_select="iso_media"
asf_demuxer_select="riffdec"
asf_o_demuxer_select="riffdec"
asf_muxer_select="riffenc"
asf_stream_muxer_select="asf_muxer"
avi_demuxer_select="iso_media riffdec exif"
avi_muxer_select="riffenc"
caf_demuxer_select="iso_media riffdec"
caf_muxer_select="iso_media"
dash_muxer_select="mp4_muxer"
dash_demuxer_deps="libxml2"
dirac_demuxer_select="dirac_parser"
dts_demuxer_select="dca_parser"
dtshd_demuxer_select="dca_parser"
dv_demuxer_select="dvprofile"
dv_muxer_select="dvprofile"
dxa_demuxer_select="riffdec"
eac3_demuxer_select="ac3_parser"
f4v_muxer_select="mov_muxer"
fifo_muxer_deps="threads"
flac_demuxer_select="flac_parser"
hds_muxer_select="flv_muxer"
hls_muxer_select="mpegts_muxer"
hls_muxer_suggest="gcrypt openssl"
image2_alias_pix_demuxer_select="image2_demuxer"
image2_brender_pix_demuxer_select="image2_demuxer"
ipod_muxer_select="mov_muxer"
ismv_muxer_select="mov_muxer"
matroska_audio_muxer_select="matroska_muxer"
matroska_demuxer_select="iso_media riffdec"
matroska_demuxer_suggest="bzlib lzo zlib"
matroska_muxer_select="iso_media riffenc"
mmf_muxer_select="riffenc"
mov_demuxer_select="iso_media riffdec"
mov_demuxer_suggest="zlib"
mov_muxer_select="iso_media riffenc rtpenc_chain"
mp3_demuxer_select="mpegaudio_parser"
mp3_muxer_select="mpegaudioheader"
mp4_muxer_select="mov_muxer"
mpegts_demuxer_select="iso_media"
mpegts_muxer_select="adts_muxer latm_muxer"
mpegtsraw_demuxer_select="mpegts_demuxer"
mxf_d10_muxer_select="mxf_muxer"
mxf_opatom_muxer_select="mxf_muxer"
nut_muxer_select="riffenc"
nuv_demuxer_select="riffdec"
oga_muxer_select="ogg_muxer"
ogg_demuxer_select="dirac_parse"
ogv_muxer_select="ogg_muxer"
opus_muxer_select="ogg_muxer"
psp_muxer_select="mov_muxer"
rtp_demuxer_select="sdp_demuxer"
rtp_muxer_select="golomb"
rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol srtp"
rtsp_demuxer_select="http_protocol rtpdec"
rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
sap_demuxer_select="sdp_demuxer"
sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
sdp_demuxer_select="rtpdec"
smoothstreaming_muxer_select="ismv_muxer"
spdif_demuxer_select="adts_header"
spdif_muxer_select="adts_header"
spx_muxer_select="ogg_muxer"
swf_demuxer_suggest="zlib"
tak_demuxer_select="tak_parser"
tg2_muxer_select="mov_muxer"
tgp_muxer_select="mov_muxer"
vobsub_demuxer_select="mpegps_demuxer"
w64_demuxer_select="wav_demuxer"
w64_muxer_select="wav_muxer"
wav_demuxer_select="riffdec"
wav_muxer_select="riffenc"
webm_muxer_select="iso_media riffenc"
webm_dash_manifest_demuxer_select="matroska_demuxer"
wtv_demuxer_select="mpegts_demuxer riffdec"
wtv_muxer_select="mpegts_muxer riffenc"
xmv_demuxer_select="riffdec"
xwma_demuxer_select="riffdec"

# indevs / outdevs
android_camera_indev_deps="android camera2ndk mediandk pthreads"
android_camera_indev_extralibs="-landroid -lcamera2ndk -lmediandk"
alsa_indev_deps="alsa"
alsa_outdev_deps="alsa"
avfoundation_indev_deps="avfoundation corevideo coremedia pthreads"
avfoundation_indev_suggest="coregraphics applicationservices"
avfoundation_indev_extralibs="-framework Foundation"
bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
caca_outdev_deps="libcaca"
decklink_deps_any="libdl LoadLibrary"
decklink_indev_deps="decklink threads"
decklink_indev_extralibs="-lstdc++"
decklink_outdev_deps="decklink threads"
decklink_outdev_extralibs="-lstdc++"
libndi_newtek_indev_deps="libndi_newtek"
libndi_newtek_indev_extralibs="-lndi"
libndi_newtek_outdev_deps="libndi_newtek"
libndi_newtek_outdev_extralibs="-lndi"
dshow_indev_deps="IBaseFilter"
dshow_indev_extralibs="-lpsapi -lole32 -lstrmiids -luuid -loleaut32 -lshlwapi"
fbdev_indev_deps="linux_fb_h"
fbdev_outdev_deps="linux_fb_h"
gdigrab_indev_deps="CreateDIBSection"
gdigrab_indev_extralibs="-lgdi32"
gdigrab_indev_select="bmp_decoder"
iec61883_indev_deps="libiec61883"
jack_indev_deps="libjack"
jack_indev_deps_any="sem_timedwait dispatch_dispatch_h"
kmsgrab_indev_deps="libdrm"
lavfi_indev_deps="avfilter"
libcdio_indev_deps="libcdio"
libdc1394_indev_deps="libdc1394"
openal_indev_deps="openal"
opengl_outdev_deps="opengl"
oss_indev_deps_any="sys_soundcard_h"
oss_outdev_deps_any="sys_soundcard_h"
pulse_indev_deps="libpulse"
pulse_outdev_deps="libpulse"
sdl2_outdev_deps="sdl2"
sndio_indev_deps="sndio"
sndio_outdev_deps="sndio"
v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
v4l2_indev_suggest="libv4l2"
v4l2_outdev_deps_any="linux_videodev2_h sys_videoio_h"
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"

# protocols
async_protocol_deps="threads"
bluray_protocol_deps="libbluray"
ffrtmpcrypt_protocol_conflict="librtmp_protocol"
ffrtmpcrypt_protocol_deps_any="gcrypt gmp openssl"
ffrtmpcrypt_protocol_select="tcp_protocol"
ffrtmphttp_protocol_conflict="librtmp_protocol"
ffrtmphttp_protocol_select="http_protocol"
ftp_protocol_select="tcp_protocol"
gopher_protocol_select="network"
http_protocol_select="tcp_protocol"
http_protocol_suggest="zlib"
httpproxy_protocol_select="tcp_protocol"
httpproxy_protocol_suggest="zlib"
https_protocol_select="tls_protocol"
https_protocol_suggest="zlib"
icecast_protocol_select="http_protocol"
librtmp_protocol_deps="librtmp"
librtmpe_protocol_deps="librtmp"
librtmps_protocol_deps="librtmp"
librtmpt_protocol_deps="librtmp"
librtmpte_protocol_deps="librtmp"
libsmbclient_protocol_deps="libsmbclient gplv3"
libssh_protocol_deps="libssh"
libtls_conflict="openssl gnutls"
mmsh_protocol_select="http_protocol"
mmst_protocol_select="network"
rtmp_protocol_conflict="librtmp_protocol"
rtmp_protocol_select="tcp_protocol"
rtmp_protocol_suggest="zlib"
rtmpe_protocol_select="ffrtmpcrypt_protocol"
rtmpe_protocol_suggest="zlib"
rtmps_protocol_conflict="librtmp_protocol"
rtmps_protocol_select="tls_protocol"
rtmps_protocol_suggest="zlib"
rtmpt_protocol_select="ffrtmphttp_protocol"
rtmpt_protocol_suggest="zlib"
rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
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"
sctp_protocol_deps="struct_sctp_event_subscribe struct_msghdr_msg_flags"
sctp_protocol_select="network"
securetransport_conflict="openssl gnutls libtls"
srtp_protocol_select="rtp_protocol srtp"
tcp_protocol_select="network"
tls_protocol_deps_any="gnutls openssl schannel securetransport libtls"
tls_protocol_select="tcp_protocol"
udp_protocol_select="network"
udplite_protocol_select="network"
unix_protocol_deps="sys_un_h"
unix_protocol_select="network"

# filters
afftfilt_filter_deps="avcodec"
afftfilt_filter_select="fft"
afir_filter_deps="avcodec"
afir_filter_select="fft"
amovie_filter_deps="avcodec avformat"
aresample_filter_deps="swresample"
ass_filter_deps="libass"
atempo_filter_deps="avcodec"
atempo_filter_select="rdft"
azmq_filter_deps="libzmq"
blackframe_filter_deps="gpl"
boxblur_filter_deps="gpl"
bs2b_filter_deps="libbs2b"
colormatrix_filter_deps="gpl"
convolve_filter_deps="avcodec"
convolve_filter_select="fft"
coreimage_filter_deps="coreimage appkit"
coreimage_filter_extralibs="-framework OpenGL"
coreimagesrc_filter_deps="coreimage appkit"
coreimagesrc_filter_extralibs="-framework OpenGL"
cover_rect_filter_deps="avcodec avformat gpl"
cropdetect_filter_deps="gpl"
deconvolve_filter_deps="avcodec"
deconvolve_filter_select="fft"
deinterlace_qsv_filter_deps="libmfx"
deinterlace_vaapi_filter_deps="vaapi"
delogo_filter_deps="gpl"
denoise_vaapi_filter_deps="vaapi VAProcPipelineParameterBuffer"
deshake_filter_select="pixelutils"
drawtext_filter_deps="libfreetype"
drawtext_filter_suggest="libfontconfig libfribidi"
elbg_filter_deps="avcodec"
eq_filter_deps="gpl"
fftfilt_filter_deps="avcodec"
fftfilt_filter_select="rdft"
find_rect_filter_deps="avcodec avformat gpl"
firequalizer_filter_deps="avcodec"
firequalizer_filter_select="rdft"
flite_filter_deps="libflite"
framerate_filter_select="pixelutils"
frei0r_filter_deps="frei0r libdl"
frei0r_src_filter_deps="frei0r libdl"
fspp_filter_deps="gpl"
geq_filter_deps="gpl"
histeq_filter_deps="gpl"
hqdn3d_filter_deps="gpl"
interlace_filter_deps="gpl"
kerndeint_filter_deps="gpl"
ladspa_filter_deps="ladspa libdl"
lv2_filter_deps="lv2"
mcdeint_filter_deps="avcodec gpl"
movie_filter_deps="avcodec avformat"
mpdecimate_filter_deps="gpl"
mpdecimate_filter_select="pixelutils"
mptestsrc_filter_deps="gpl"
negate_filter_deps="lut_filter"
nnedi_filter_deps="gpl"
ocr_filter_deps="libtesseract"
ocv_filter_deps="libopencv"
openclsrc_filter_deps="opencl"
overlay_opencl_filter_deps="opencl"
overlay_qsv_filter_deps="libmfx"
overlay_qsv_filter_select="qsvvpp"
owdenoise_filter_deps="gpl"
pan_filter_deps="swresample"
perspective_filter_deps="gpl"
phase_filter_deps="gpl"
pp7_filter_deps="gpl"
pp_filter_deps="gpl postproc"
procamp_vaapi_filter_deps="vaapi VAProcPipelineParameterBuffer"
program_opencl_filter_deps="opencl"
pullup_filter_deps="gpl"
removelogo_filter_deps="avcodec avformat swscale"
repeatfields_filter_deps="gpl"
resample_filter_deps="avresample"
rubberband_filter_deps="librubberband"
sab_filter_deps="gpl swscale"
scale2ref_filter_deps="swscale"
scale_filter_deps="swscale"
scale_qsv_filter_deps="libmfx"
select_filter_select="pixelutils"
sharpness_vaapi_filter_deps="vaapi VAProcPipelineParameterBuffer"
showcqt_filter_deps="avcodec avformat swscale"
showcqt_filter_suggest="libfontconfig libfreetype"
showcqt_filter_select="fft"
showfreqs_filter_deps="avcodec"
showfreqs_filter_select="fft"
showspectrum_filter_deps="avcodec"
showspectrum_filter_select="fft"
showspectrumpic_filter_deps="avcodec"
showspectrumpic_filter_select="fft"
signature_filter_deps="gpl avcodec avformat"
smartblur_filter_deps="gpl swscale"
sofalizer_filter_deps="libmysofa avcodec"
sofalizer_filter_select="fft"
spectrumsynth_filter_deps="avcodec"
spectrumsynth_filter_select="fft"
spp_filter_deps="gpl avcodec"
spp_filter_select="fft idctdsp fdctdsp me_cmp pixblockdsp"
stereo3d_filter_deps="gpl"
subtitles_filter_deps="avformat avcodec libass"
super2xsai_filter_deps="gpl"
pixfmts_super2xsai_test_deps="super2xsai_filter"
tinterlace_filter_deps="gpl"
tinterlace_merge_test_deps="tinterlace_filter"
tinterlace_pad_test_deps="tinterlace_filter"
tonemap_filter_deps="const_nan"
unsharp_opencl_filter_deps="opencl"
uspp_filter_deps="gpl avcodec"
vaguedenoiser_filter_deps="gpl"
vidstabdetect_filter_deps="libvidstab"
vidstabtransform_filter_deps="libvidstab"
libvmaf_filter_deps="libvmaf pthreads"
zmq_filter_deps="libzmq"
zoompan_filter_deps="swscale"
zscale_filter_deps="libzimg const_nan"
scale_vaapi_filter_deps="vaapi VAProcPipelineParameterBuffer"
vpp_qsv_filter_deps="libmfx"
vpp_qsv_filter_select="qsvvpp"

# examples
avio_dir_cmd_deps="avformat avutil"
avio_reading_deps="avformat avcodec avutil"
decode_audio_example_deps="avcodec avutil"
decode_video_example_deps="avcodec avutil"
demuxing_decoding_example_deps="avcodec avformat avutil"
encode_audio_example_deps="avcodec avutil"
encode_video_example_deps="avcodec avutil"
extract_mvs_example_deps="avcodec avformat avutil"
filter_audio_example_deps="avfilter avutil"
filtering_audio_example_deps="avfilter avcodec avformat avutil"
filtering_video_example_deps="avfilter avcodec avformat avutil"
http_multiclient_example_deps="avformat avutil fork"
hw_decode_example_deps="avcodec avformat avutil"
metadata_example_deps="avformat avutil"
muxing_example_deps="avcodec avformat avutil swscale"
qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder"
remuxing_example_deps="avcodec avformat avutil"
resampling_audio_example_deps="avutil swresample"
scaling_video_example_deps="avutil swscale"
transcode_aac_example_deps="avcodec avformat swresample"
transcoding_example_deps="avfilter avcodec avformat avutil"
vaapi_encode_example_deps="avcodec avutil h264_vaapi_encoder"
vaapi_transcode_example_deps="avcodec avformat avutil h264_vaapi_encoder"

# EXTRALIBS_LIST
cpu_init_extralibs="pthreads_extralibs"
cws2fws_extralibs="zlib_extralibs"

# libraries, in linking order
avcodec_deps="avutil"
avcodec_suggest="libm"
avcodec_select="null_bsf"
avdevice_deps="avformat avcodec avutil"
avdevice_suggest="libm"
avfilter_deps="avutil"
avfilter_suggest="libm"
avformat_deps="avcodec avutil"
avformat_suggest="libm network zlib"
avresample_deps="avutil"
avresample_suggest="libm"
avutil_suggest="clock_gettime cuda libm libdrm libmfx opencl user32 vaapi videotoolbox corefoundation corevideo coremedia wincrypt"
postproc_deps="avutil gpl"
postproc_suggest="libm"
swresample_deps="avutil"
swresample_suggest="libm libsoxr"
swscale_deps="avutil"
swscale_suggest="libm"

avcodec_extralibs="pthreads_extralibs iconv_extralibs"
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_select="aformat_filter anull_filter atrim_filter format_filter
               null_filter
               trim_filter"
ffmpeg_suggest="ole32 psapi shell32"
ffplay_deps="avcodec avformat swscale swresample sdl2"
ffplay_select="rdft crop_filter transpose_filter hflip_filter vflip_filter rotate_filter"
ffplay_suggest="shell32"
ffprobe_deps="avcodec avformat"
ffprobe_suggest="shell32"

# documentation
podpages_deps="perl"
manpages_deps="perl pod2man"
htmlpages_deps="perl"
htmlpages_deps_any="makeinfo_html texi2html"
txtpages_deps="perl makeinfo"
doc_deps_any="manpages htmlpages podpages txtpages"

# default parameters

logfile="ffbuild/config.log"

# installation paths
prefix_default="/usr/local"
bindir_default='${prefix}/bin'
datadir_default='${prefix}/share/ffmpeg'
docdir_default='${prefix}/share/doc/ffmpeg'
incdir_default='${prefix}/include'
libdir_default='${prefix}/lib'
mandir_default='${prefix}/share/man'

# toolchain
ar_default="ar"
cc_default="gcc"
cxx_default="g++"
host_cc_default="gcc"
doxygen_default="doxygen"
install="install"
ln_s_default="ln -s -f"
nm_default="nm -g"
pkg_config_default=pkg-config
ranlib_default="ranlib"
strip_default="strip"
version_script='--version-script'
objformat="elf32"
x86asmexe_default="nasm"
windres_default="windres"
nvcc_default="nvcc"
nvccflags_default="-gencode arch=compute_30,code=sm_30 -O2"
striptype="direct"

# OS
target_os_default=$(tolower $(uname -s))
host_os=$target_os_default

# machine
if test "$target_os_default" = aix; then
    arch_default=$(uname -p)
    strip_default="strip -X32_64"
else
    arch_default=$(uname -m)
fi
cpu="generic"
intrinsics="none"

# configurable options
enable $PROGRAM_LIST
enable $DOCUMENT_LIST
enable $EXAMPLE_LIST
enable $(filter_out avresample $LIBRARY_LIST)
enable stripping

enable asm
enable debug
enable doc
enable faan faandct faanidct
enable optimizations
enable runtime_cpudetect
enable safe_bitstream_reader
enable static
enable swscale_alpha
enable valgrind_backtrace

sws_max_filter_size_default=256
set_default sws_max_filter_size

# internal components are enabled by default
enable $EXTRALIBS_LIST

# Avoid external, non-system, libraries getting enabled by dependency resolution
disable $EXTERNAL_LIBRARY_LIST $HWACCEL_LIBRARY_LIST

# build settings
SHFLAGS='-shared -Wl,-soname,$$(@F)'
LIBPREF="lib"
LIBSUF=".a"
FULLNAME='$(NAME)$(BUILDSUF)'
LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
SLIBPREF="lib"
SLIBSUF=".so"
SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
VERSION_SCRIPT_POSTPROCESS_CMD="cat"

asflags_filter=echo
cflags_filter=echo
ldflags_filter=echo

AS_C='-c'
AS_O='-o $@'
CC_C='-c'
CC_E='-E -o $@'
CC_O='-o $@'
CXX_C='-c'
CXX_O='-o $@'
OBJCC_C='-c'
OBJCC_E='-E -o $@'
OBJCC_O='-o $@'
X86ASM_O='-o $@'
LD_O='-o $@'
LD_LIB='-l%'
LD_PATH='-L'
HOSTCC_C='-c'
HOSTCC_E='-E -o $@'
HOSTCC_O='-o $@'
HOSTLD_O='-o $@'
NVCC_C='-c'
NVCC_O='-o $@'

host_extralibs='-lm'
host_cflags_filter=echo
host_ldflags_filter=echo

target_path='$(CURDIR)'

# since the object filename is not given with the -MM flag, the compiler
# is only able to print the basename, and we must add the path ourselves
DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>/dev/null | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(@F),$(@D)/$(@F)," > $(@:.o=.d)'
DEPFLAGS='-MM'

mkdir -p ffbuild

# find source path
if test -f configure; then
    source_path=.
else
    source_path=$(cd $(dirname "$0"); pwd)
    case "$source_path" in
        *[[:blank:]]*) die "Out of tree builds are impossible with whitespace in source path." ;;
    esac
    test -e "$source_path/config.h" &&
        die "Out of tree builds are impossible with config.h in source dir."
fi

for v in "$@"; do
    r=${v#*=}
    l=${v%"$r"}
    r=$(sh_quote "$r")
    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=$2
    file=$source_path/$3
    out=${4:-$thing}
    sed -n "s/^[^#]*extern.*$pattern *ff_\([^ ]*\)_$thing;/\1_$out/p" "$file"
}

OUTDEV_LIST=$(find_things_extern muxer AVOutputFormat libavdevice/alldevices.c outdev)
INDEV_LIST=$(find_things_extern demuxer AVInputFormat libavdevice/alldevices.c indev)
MUXER_LIST=$(find_things_extern muxer AVOutputFormat libavformat/allformats.c)
DEMUXER_LIST=$(find_things_extern demuxer AVInputFormat libavformat/allformats.c)
ENCODER_LIST=$(find_things_extern encoder AVCodec libavcodec/allcodecs.c)
DECODER_LIST=$(find_things_extern decoder AVCodec libavcodec/allcodecs.c)
CODEC_LIST="
    $ENCODER_LIST
    $DECODER_LIST
"
PARSER_LIST=$(find_things_extern parser AVCodecParser libavcodec/parser.c)
BSF_LIST=$(find_things_extern bsf AVBitStreamFilter libavcodec/bitstream_filters.c)
HWACCEL_LIST=$(find_things_extern hwaccel AVHWAccel libavcodec/hwaccels.h)
PROTOCOL_LIST=$(find_things_extern protocol URLProtocol libavformat/protocols.c)

AVCODEC_COMPONENTS_LIST="
    $BSF_LIST
    $DECODER_LIST
    $ENCODER_LIST
    $HWACCEL_LIST
    $PARSER_LIST
"

AVDEVICE_COMPONENTS_LIST="
    $INDEV_LIST
    $OUTDEV_LIST
"

AVFILTER_COMPONENTS_LIST="
    $FILTER_LIST
"

AVFORMAT_COMPONENTS_LIST="
    $DEMUXER_LIST
    $MUXER_LIST
    $PROTOCOL_LIST
"

ALL_COMPONENTS="
    $AVCODEC_COMPONENTS_LIST
    $AVDEVICE_COMPONENTS_LIST
    $AVFILTER_COMPONENTS_LIST
    $AVFORMAT_COMPONENTS_LIST
"

for n in $COMPONENT_LIST; do
    v=$(toupper ${n%s})_LIST
    eval enable \$$v
    eval ${n}_if_any="\$$v"
done

enable $ARCH_EXT_LIST

die_unknown(){
    echo "Unknown option \"$1\"."
    echo "See $0 --help for available options."
    exit 1
}

print_in_columns() {
    cols=$(expr $ncols / 24)
    cat | tr ' ' '\n' | sort | pr -r "-$cols" -w $ncols -t
}

show_list() {
    suffix=_$1
    shift
    echo $* | sed s/$suffix//g | print_in_columns
    exit 0
}

rand_list(){
    IFS=', '
    set -- $*
    unset IFS
    for thing; do
        comp=${thing%:*}
        prob=${thing#$comp}
        prob=${prob#:}
        is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
        echo "prob ${prob:-0.5}"
        printf '%s\n' $comp
    done
}

do_random(){
    action=$1
    shift
    random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
    $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
}

for opt do
    optval="${opt#*=}"
    case "$opt" in
        --extra-ldflags=*)
            add_ldflags $optval
        ;;
        --extra-ldexeflags=*)
            add_ldexeflags $optval
        ;;
        --extra-ldsoflags=*)
            add_ldsoflags $optval
        ;;
        --extra-ldlibflags=*)
            warn "The --extra-ldlibflags option is only provided for compatibility and will be\n"\
                 "removed in the future. Use --extra-ldsoflags instead."
            add_ldsoflags $optval
        ;;
        --extra-libs=*)
            add_extralibs $optval
        ;;
        --disable-devices)
            disable $INDEV_LIST $OUTDEV_LIST
        ;;
        --enable-debug=*)
            debuglevel="$optval"
        ;;
        --disable-programs)
            disable $PROGRAM_LIST
        ;;
        --disable-everything)
            map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
        ;;
        --disable-all)
            map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
            disable $LIBRARY_LIST $PROGRAM_LIST doc
            enable avutil
        ;;
        --enable-random|--disable-random)
            action=${opt%%-random}
            do_random ${action#--} $COMPONENT_LIST
        ;;
        --enable-random=*|--disable-random=*)
            action=${opt%%-random=*}
            do_random ${action#--} $optval
        ;;
        --enable-sdl)
            enable sdl2
        ;;
        --enable-*=*|--disable-*=*)
            eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
            is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
            eval list=\$$(toupper $thing)_LIST
            name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
            list=$(filter "$name" $list)
            [ "$list" = "" ] && warn "Option $opt did not match anything"
            $action $list
        ;;
        --enable-yasm|--disable-yasm)
            warn "The ${opt} option is only provided for compatibility and will be\n"\
                 "removed in the future. Use --enable-x86asm / --disable-x86asm instead."
            test $opt = --enable-yasm && x86asm=yes || x86asm=no
        ;;
        --yasmexe=*)
            warn "The --yasmexe option is only provided for compatibility and will be\n"\
                 "removed in the future. Use --x86asmexe instead."
            x86asmexe="$optval"
        ;;
        --enable-?*|--disable-?*)
            eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
            if is_in $option $COMPONENT_LIST; then
                test $action = disable && action=unset
                eval $action \$$(toupper ${option%s})_LIST
            elif is_in $option $CMDLINE_SELECT; then
                $action $option
            else
                die_unknown $opt
            fi
        ;;
        --list-*)
            NAME="${opt#--list-}"
            is_in $NAME $COMPONENT_LIST || die_unknown $opt
            NAME=${NAME%s}
            eval show_list $NAME \$$(toupper $NAME)_LIST
        ;;
        --help|-h) show_help
        ;;
        --quiet|-q) quiet=yes
        ;;
        --fatal-warnings) enable fatal_warnings
        ;;
        --libfuzzer=*)
            libfuzzer_path="$optval"
        ;;
        *)
            optname="${opt%%=*}"
            optname="${optname#--}"
            optname=$(echo "$optname" | sed 's/-/_/g')
            if is_in $optname $CMDLINE_SET; then
                eval $optname='$optval'
            elif is_in $optname $CMDLINE_APPEND; then
                append $optname "$optval"
            else
                die_unknown $opt
            fi
        ;;
    esac
done

for e in $env; do
    eval "export $e"
done

if disabled autodetect; then

    # Unless iconv is explicitely disabled by the user, we still want to probe
    # for the iconv from the libc.
    disabled iconv || enable libc_iconv

    disable_weak $EXTERNAL_AUTODETECT_LIBRARY_LIST
    disable_weak $HWACCEL_AUTODETECT_LIBRARY_LIST
fi
# Mark specifically enabled, but normally autodetected libraries as requested.
for lib in $AUTODETECT_LIBS; do
    enabled $lib && request $lib
done
#TODO: switch to $AUTODETECT_LIBS when $THREADS_LIST is supported the same way
enable_weak $EXTERNAL_AUTODETECT_LIBRARY_LIST
enable_weak $HWACCEL_AUTODETECT_LIBRARY_LIST

disabled logging && logfile=/dev/null

# command line configuration sanity checks

# we need to build at least one lib type
if ! enabled_any static shared; then
    cat <<EOF
At least one library type must be built.
Specify --enable-static to build the static libraries or --enable-shared to
build the shared libraries as well. To only build the shared libraries specify
--disable-static in addition to --enable-shared.
EOF
    exit 1
fi

die_license_disabled() {
    enabled $1 || { enabled $v && die "$v is $1 and --enable-$1 is not specified."; }
}

die_license_disabled_gpl() {
    enabled $1 || { enabled $v && die "$v is incompatible with the gpl and --enable-$1 is not specified."; }
}

map "die_license_disabled gpl"      $EXTERNAL_LIBRARY_GPL_LIST $EXTERNAL_LIBRARY_GPLV3_LIST
map "die_license_disabled version3" $EXTERNAL_LIBRARY_VERSION3_LIST $EXTERNAL_LIBRARY_GPLV3_LIST

enabled gpl && map "die_license_disabled_gpl nonfree" $EXTERNAL_LIBRARY_NONFREE_LIST
map "die_license_disabled nonfree" $HWACCEL_LIBRARY_NONFREE_LIST

enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }

if enabled nonfree; then
    license="nonfree and unredistributable"
elif enabled gplv3; then
    license="GPL version 3 or later"
elif enabled lgplv3; then
    license="LGPL version 3 or later"
elif enabled gpl; then
    license="GPL version 2 or later"
else
    license="LGPL version 2.1 or later"
fi

enabled_all gnutls openssl &&
    die "GnuTLS and OpenSSL 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.

disable_components(){
    disabled ${1} && disable $(
        eval components="\$$(toupper ${1})_COMPONENTS"
        map 'eval echo \${$(toupper ${v%s})_LIST}' $components
    )
}

map 'disable_components $v' $LIBRARY_LIST

echo "# $0 $FFMPEG_CONFIGURATION" > $logfile
set >> $logfile

test -n "$valgrind" && toolchain="valgrind-memcheck"

enabled ossfuzz && {
    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
}

case "$toolchain" in
    *-asan)
        cc_default="${toolchain%-asan}"
        add_cflags  -fsanitize=address
        add_ldflags -fsanitize=address
    ;;
    *-msan)
        cc_default="${toolchain%-msan}"
        add_cflags  -fsanitize=memory -fsanitize-memory-track-origins
        add_ldflags -fsanitize=memory
    ;;
    *-tsan)
        cc_default="${toolchain%-tsan}"
        add_cflags  -fsanitize=thread -fPIE
        add_ldflags -fsanitize=thread -pie
        case "$toolchain" in
            gcc-tsan)
                add_cflags  -fPIC
                add_ldflags -fPIC
                ;;
        esac
    ;;
    *-usan)
        cc_default="${toolchain%-usan}"
        add_cflags  -fsanitize=undefined
        add_ldflags -fsanitize=undefined
    ;;
    valgrind-*)
        target_exec_default="valgrind"
        case "$toolchain" in
            valgrind-massif)
                target_exec_args="--tool=massif --alloc-fn=av_malloc --alloc-fn=av_mallocz --alloc-fn=av_calloc --alloc-fn=av_fast_padded_malloc --alloc-fn=av_fast_malloc --alloc-fn=av_realloc_f --alloc-fn=av_fast_realloc --alloc-fn=av_realloc"
                ;;
            valgrind-memcheck)
                target_exec_args="--error-exitcode=1 --malloc-fill=0x2a --track-origins=yes --leak-check=full --gen-suppressions=all --suppressions=$source_path/tests/fate-valgrind.supp"
                ;;
        esac
    ;;
    msvc)
        # Check whether the current MSVC version needs the C99 converter.
        # From MSVC 2013 (compiler major version 18) onwards, it does actually
        # support enough of C99 to build ffmpeg. Default to the new
        # behaviour if the regexp was unable to match anything, since this
        # successfully parses the version number of existing supported
        # versions that require the converter (MSVC 2010 and 2012).
        cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
        if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
            cc_default="cl"
            cxx_default="cl"
        else
            cc_default="c99wrap cl"
            cxx_default="c99wrap cl"
        fi
        ld_default="$source_path/compat/windows/mslink"
        nm_default="dumpbin -symbols"
        ar_default="lib"
        case "$arch" in
        aarch64|arm64)
            as_default="armasm64"
            ;;
        arm*)
            as_default="armasm"
            ;;
        esac
        target_os_default="win32"
        # Use a relative path for TMPDIR. This makes sure all the
        # ffconf temp files are written with a relative path, avoiding
        # issues with msys/win32 path conversion for MSVC parameters
        # such as -Fo<file> or -out:<file>.
        TMPDIR=.
    ;;
    icl)
        cc_default="icl"
        ld_default="xilink"
        nm_default="dumpbin -symbols"
        ar_default="xilib"
        target_os_default="win32"
        TMPDIR=.
    ;;
    gcov)
        add_cflags  -fprofile-arcs -ftest-coverage
        add_ldflags -fprofile-arcs -ftest-coverage
    ;;
    llvm-cov)
        add_cflags -fprofile-arcs -ftest-coverage
        add_ldflags --coverage
    ;;
    hardened)
        add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
        add_cflags   -fno-strict-overflow -fstack-protector-all
        add_ldflags  -Wl,-z,relro -Wl,-z,now
        add_cflags   -fPIE
        add_ldexeflags -fPIE -pie
    ;;
    ?*)
        die "Unknown toolchain $toolchain"
    ;;
esac

if test -n "$cross_prefix"; then
    test -n "$arch" && test -n "$target_os" ||
        die "Must specify target arch (--arch) and OS (--target-os) when cross-compiling"
    enable cross_compile
fi

ar_default="${cross_prefix}${ar_default}"
cc_default="${cross_prefix}${cc_default}"
cxx_default="${cross_prefix}${cxx_default}"
nm_default="${cross_prefix}${nm_default}"
pkg_config_default="${cross_prefix}${pkg_config_default}"
if ${cross_prefix}${ranlib_default} 2>&1 | grep -q "\-D "; then
    ranlib_default="${cross_prefix}${ranlib_default} -D"
else
    ranlib_default="${cross_prefix}${ranlib_default}"
fi
strip_default="${cross_prefix}${strip_default}"
windres_default="${cross_prefix}${windres_default}"

sysinclude_default="${sysroot}/usr/include"

set_default arch cc cxx doxygen pkg_config ranlib strip sysinclude \
    target_exec target_os x86asmexe nvcc
enabled cross_compile || host_cc_default=$cc
set_default host_cc

pkg_config_fail_message=""
if ! $pkg_config --version >/dev/null 2>&1; then
    warn "$pkg_config not found, library detection may fail."
    pkg_config=false
elif is_in -static $cc $LDFLAGS && ! is_in --static $pkg_config $pkg_config_flags; then
    pkg_config_fail_message="
Note: When building a static binary, add --pkg-config-flags=\"--static\"."
fi

if test $doxygen != $doxygen_default && \
  ! $doxygen --version >/dev/null 2>&1; then
    warn "Specified doxygen \"$doxygen\" not found, API documentation will fail to build."
fi

exesuf() {
    case $1 in
        mingw32*|mingw64*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
    esac
}

EXESUF=$(exesuf $target_os)
HOSTEXESUF=$(exesuf $host_os)

# set temporary file name
: ${TMPDIR:=$TEMPDIR}
: ${TMPDIR:=$TMP}
: ${TMPDIR:=/tmp}

if [ -n "$tempprefix" ] ; then
    mktemp(){
        tmpname="$tempprefix.${HOSTNAME}.${UID}"