ffmpeg从入门到放弃(一):编译流程介绍

#!/bin/sh

# default parameters
prefix="/usr/local"
cc="gcc"
ar="ar"
cpu=`uname -m`
case "$cpu" in
  i386|i486|i586|i686)
    cpu="x86"
    mmx="yes"
  ;;
  *)
    mmx="no"
  ;;
esac
gprof="no"

if [ "$1" = "-h" -o "$1" = "--help" ] ; then
cat << EOF

Usage: configure [options]
Options: [defaults in brackets after descriptions]

  --help                  print this message
EOF
echo "  --prefix=PREFIX         install in PREFIX [$prefix]"
echo "  --cc=CC                 use C compiler CC [$cc]"
echo "  --cpu=CPU               force cpu to CPU  [$cpu]"
echo "  --disable-mmx           disable mmx usage"
echo "  --enable-gprof          enable profiling with gprof [$gprof]"
exit 1
fi
for opt do
  case "$opt" in
  --prefix=*) prefix=`echo $opt | cut -d '=' -f 2`
  ;;
  --cc=*) cc=`echo $opt | cut -d '=' -f 2`
  ;;
  --cpu=*) cpu=`echo $opt | cut -d '=' -f 2`
  ;;
  --disable-mmx) mmx="no"
  ;;
  --enable-gprof) gprof="yes"
  ;;
  esac
done

echo "Install prefix   $prefix"
echo "C compiler       $cc"
echo "CPU              $cpu"
echo "MMX enabled      $mmx"
echo "gprof enabled    $gprof"

echo "Creating config.mk and config.h"

echo "# Automatically generated by configure - do not modify" > config.mk
echo "/* Automatically generated by configure - do not modify */" > config.h

echo "PREFIX=$prefix" >> config.mk
echo "CC=$cc" >> config.mk
echo "AR=$ar" >> config.mk
if [ "$cpu" = "x86" ] ; then
  echo "CONFIG_CPU_X86=y" >> config.mk
  echo "#define CONFIG_CPU_X86 1" >> config.h
fi
if [ "$mmx" = "yes" ] ; then
  echo "CONFIG_MMX=y" >> config.mk
  echo "#define CONFIG_MMX 1" >> config.h
fi
if [ "$gprof" = "yes" ] ; then
  echo "CONFIG_GPROF=y" >> config.mk
fi
if [ "$gprof" = "yes" ] ; then
  echo "CONFIG_GPROF=y" >> config.mk
  echo "#define CONFIG_GPROF 1" >> config.h
fi

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
        ;;
        (省略)
    esac
done

CFLAGS= -O2 -Wall -g -I./libav
LDFLAGS= -g -L./libav

PROG= ffmpeg ffserver

all: lib $(PROG)

lib:
    make -C libav all

ffmpeg: rmenc.o mpegmux.o asfenc.o jpegenc.o swfenc.o udp.o formats.o grab.o ffmpeg.o libav/libav.a
    gcc $(LDFLAGS) -o $@ $^ -lav -lm

ffserver: rmenc.o mpegmux.o asfenc.o jpegenc.o swfenc.o formats.o grab.o ffserver.o libav/libav.a
    gcc $(LDFLAGS) -o $@ $^ -lav -lpthread -lm

%.o: %.c
    gcc $(CFLAGS) -c -o $@ $<

clean:
    make -C libav clean
    rm -f *.o *~ gmon.out TAGS $(PROG)

etags:
    etags *.[ch] libav/*.[ch]

tar:
    (cd .. ; tar zcvf ffmpeg-0.3.tgz ffmpeg --exclude CVS --exclude TAGS )

MAIN_MAKEFILE=1
include ffbuild/config.mak

vpath %.cpp  $(SRC_PATH)
vpath %.h    $(SRC_PATH)
vpath %.inc  $(SRC_PATH)
vpath %.m    $(SRC_PATH)
vpath %.S    $(SRC_PATH)
vpath %.asm  $(SRC_PATH)
vpath %.rc   $(SRC_PATH)
vpath %.v    $(SRC_PATH)
vpath %.texi $(SRC_PATH)
vpath %.cu   $(SRC_PATH)
vpath %.ptx  $(SRC_PATH)
vpath %/fate_config.sh.template $(SRC_PATH)

TESTTOOLS   = audiogen videogen rotozoom tiny_psnr tiny_ssim base64 audiomatch
HOSTPROGS  := $(TESTTOOLS:%=tests/%) doc/print_options

# $(FFLIBS-yes) needs to be in linking order
FFLIBS-$(CONFIG_AVDEVICE)   += avdevice
FFLIBS-$(CONFIG_AVFILTER)   += avfilter
FFLIBS-$(CONFIG_AVFORMAT)   += avformat
FFLIBS-$(CONFIG_AVCODEC)    += avcodec
FFLIBS-$(CONFIG_AVRESAMPLE) += avresample
FFLIBS-$(CONFIG_POSTPROC)   += postproc
FFLIBS-$(CONFIG_SWRESAMPLE) += swresample
FFLIBS-$(CONFIG_SWSCALE)    += swscale

FFLIBS := avutil

DATA_FILES := $(wildcard $(SRC_PATH)/presets/*.ffpreset) $(SRC_PATH)/doc/ffprobe.xsd

SKIPHEADERS = compat/w32pthreads.h

# first so "all" becomes default target
all: all-yes

include $(SRC_PATH)/tools/Makefile
include $(SRC_PATH)/ffbuild/common.mak

FF_EXTRALIBS := $(FFEXTRALIBS)
FF_DEP_LIBS  := $(DEP_LIBS)
FF_STATIC_DEP_LIBS := $(STATIC_DEP_LIBS)

$(TOOLS): %$(EXESUF): %.o
    $(LD) $(LDFLAGS) $(LDEXEFLAGS) $(LD_O) $^ $(EXTRALIBS-$(*F)) $(EXTRALIBS) $(ELIBS)

target_dec_%_fuzzer$(EXESUF): target_dec_%_fuzzer.o $(FF_DEP_LIBS)
    $(LD) $(LDFLAGS) $(LDEXEFLAGS) $(LD_O) $^ $(ELIBS) $(FF_EXTRALIBS) $(LIBFUZZER_PATH)

tools/target_bsf_%_fuzzer$(EXESUF): tools/target_bsf_%_fuzzer.o $(FF_DEP_LIBS)
    $(LD) $(LDFLAGS) $(LDEXEFLAGS) $(LD_O) $^ $(ELIBS) $(FF_EXTRALIBS) $(LIBFUZZER_PATH)

target_dem_%_fuzzer$(EXESUF): target_dem_%_fuzzer.o $(FF_DEP_LIBS)
    $(LD) $(LDFLAGS) $(LDEXEFLAGS) $(LD_O) $^ $(ELIBS) $(FF_EXTRALIBS) $(LIBFUZZER_PATH)

tools/target_dem_fuzzer$(EXESUF): tools/target_dem_fuzzer.o $(FF_DEP_LIBS)
    $(LD) $(LDFLAGS) $(LDEXEFLAGS) $(LD_O) $^ $(ELIBS) $(FF_EXTRALIBS) $(LIBFUZZER_PATH)

tools/target_io_dem_fuzzer$(EXESUF): tools/target_io_dem_fuzzer.o $(FF_DEP_LIBS)
    $(LD) $(LDFLAGS) $(LDEXEFLAGS) $(LD_O) $^ $(ELIBS) $(FF_EXTRALIBS) $(LIBFUZZER_PATH)


tools/enum_options$(EXESUF): ELIBS = $(FF_EXTRALIBS)
tools/enum_options$(EXESUF): $(FF_DEP_LIBS)
tools/sofa2wavs$(EXESUF): ELIBS = $(FF_EXTRALIBS)
tools/uncoded_frame$(EXESUF): $(FF_DEP_LIBS)
tools/uncoded_frame$(EXESUF): ELIBS = $(FF_EXTRALIBS)
tools/target_dec_%_fuzzer$(EXESUF): $(FF_DEP_LIBS)
tools/target_dem_%_fuzzer$(EXESUF): $(FF_DEP_LIBS)


CONFIGURABLE_COMPONENTS =                                           \
    $(wildcard $(FFLIBS:%=$(SRC_PATH)/lib%/all*.c))                 \
    $(SRC_PATH)/libavcodec/bitstream_filters.c                      \
    $(SRC_PATH)/libavcodec/parsers.c                                \
    $(SRC_PATH)/libavformat/protocols.c                             \

config.h: ffbuild/.config
ffbuild/.config: $(CONFIGURABLE_COMPONENTS)
    @-tput bold 2>/dev/null
    @-printf '\nWARNING: $(?) newer than config.h, rerun configure\n\n'
    @-tput sgr0 2>/dev/null

SUBDIR_VARS := CLEANFILES FFLIBS HOSTPROGS TESTPROGS TOOLS               \
               HEADERS ARCH_HEADERS BUILT_HEADERS SKIPHEADERS            \
               ARMV5TE-OBJS ARMV6-OBJS ARMV8-OBJS VFP-OBJS NEON-OBJS     \
               ALTIVEC-OBJS VSX-OBJS MMX-OBJS X86ASM-OBJS                \
               MIPSFPU-OBJS MIPSDSPR2-OBJS MIPSDSP-OBJS MSA-OBJS         \
               MMI-OBJS OBJS SLIBOBJS HOSTOBJS TESTOBJS

define RESET
$(1) :=
$(1)-yes :=
endef

define DOSUBDIR
$(foreach V,$(SUBDIR_VARS),$(eval $(call RESET,$(V))))
SUBDIR := $(1)/
include $(SRC_PATH)/$(1)/Makefile
-include $(SRC_PATH)/$(1)/$(ARCH)/Makefile
-include $(SRC_PATH)/$(1)/$(INTRINSICS)/Makefile
include $(SRC_PATH)/ffbuild/library.mak
endef

$(foreach D,$(FFLIBS),$(eval $(call DOSUBDIR,lib$(D))))

include $(SRC_PATH)/fftools/Makefile
include $(SRC_PATH)/doc/Makefile
include $(SRC_PATH)/doc/examples/Makefile

libavcodec/avcodec.o libavformat/utils.o libavdevice/avdevice.o libavfilter/avfilter.o libavutil/utils.o libpostproc/postprocess.o libswresample/swresample.o libswscale/utils.o : libavutil/ffversion.h

$(PROGS): %$(PROGSSUF)$(EXESUF): %$(PROGSSUF)_g$(EXESUF)
ifeq ($(STRIPTYPE),direct)
    $(STRIP) -o $@ $<
else
    $(CP) $< $@
    $(STRIP) $@
endif

%$(PROGSSUF)_g$(EXESUF): $(FF_DEP_LIBS)
    $(LD) $(LDFLAGS) $(LDEXEFLAGS) $(LD_O) $(OBJS-$*) $(FF_EXTRALIBS)

VERSION_SH  = $(SRC_PATH)/ffbuild/version.sh
GIT_LOG     = $(SRC_PATH)/.git/logs/HEAD

.version: $(wildcard $(GIT_LOG)) $(VERSION_SH) ffbuild/config.mak
.version: M=@

libavutil/ffversion.h .version:
    $(M)$(VERSION_SH) $(SRC_PATH) libavutil/ffversion.h $(EXTRA_VERSION)
    $(Q)touch .version

# force version.sh to run whenever version might have changed
-include .version

install: install-libs install-headers

install-libs: install-libs-yes

install-data: $(DATA_FILES)
    $(Q)mkdir -p "$(DATADIR)"
    $(INSTALL) -m 644 $(DATA_FILES) "$(DATADIR)"

    uninstall: uninstall-data uninstall-headers uninstall-libs uninstall-pkgconfig

uninstall-data:
    $(RM) -r "$(DATADIR)"

clean::
    $(RM) $(CLEANSUFFIXES)
    $(RM) $(addprefix compat/,$(CLEANSUFFIXES)) $(addprefix compat/*/,$(CLEANSUFFIXES)) $(addprefix compat/*/*/,$(CLEANSUFFIXES))
    $(RM) -r coverage-html
    $(RM) -rf coverage.info coverage.info.in lcov

distclean:: clean
    $(RM) .version avversion.h config.asm config.h mapfile  \
        ffbuild/.config ffbuild/config.* libavutil/avconfig.h \
        version.h libavutil/ffversion.h libavcodec/codec_names.h \
        libavcodec/bsf_list.c libavformat/protocol_list.c \
        libavcodec/codec_list.c libavcodec/parser_list.c \
        libavfilter/filter_list.c libavdevice/indev_list.c libavdevice/outdev_list.c \
        libavformat/muxer_list.c libavformat/demuxer_list.c
ifeq ($(SRC_LINK),src)
    $(RM) src
endif
    $(RM) -rf doc/examples/pc-uninstalled

config:
    $(SRC_PATH)/configure $(value FFMPEG_CONFIGURATION)

build: all alltools examples testprogs
check: all alltools examples testprogs fate

include $(SRC_PATH)/tests/Makefile

$(sort $(OUTDIRS)):
    $(Q)mkdir -p $@

# Dummy rule to stop make trying to rebuild removed or renamed headers
%.h:
    @:

# Disable suffix rules.  Most of the builtin rules are suffix rules,
# so this saves some time on slow systems.
.SUFFIXES:

.PHONY: all all-yes alltools build check config testprogs
.PHONY: *clean install* uninstall*