configure

ffmpeg源码分析

fi
if test "$sdl" = "yes" ; then
  echo "CONFIG_SDL=yes" >> config.mak
  echo "SDL_LIBS=`"${SDL_CONFIG}" --libs`" >> config.mak
  echo "SDL_CFLAGS=`"${SDL_CONFIG}" --cflags`" >> config.mak
fi
if test "$texi2html" = "yes"; then
  echo "BUILD_DOC=yes" >> config.mak
fi
if test "$have_lrintf" = "yes" ; then
  echo "#define HAVE_LRINTF 1" >> $TMPH
fi
if test "$vhook" = "yes" ; then
  echo "BUILD_VHOOK=yes" >> config.mak
  echo "#define HAVE_VHOOK 1" >> $TMPH
fi

pp_version=`grep '#define LIBPOSTPROC_VERSION ' "$source_path/libavcodec/libpostproc/postprocess.h" | sed 's/[^0-9\.]//g'`
lavc_version=`grep '#define LIBAVCODEC_VERSION ' "$source_path/libavcodec/avcodec.h" | sed 's/[^0-9\.]//g'`
lavf_version=`grep '#define LIBAVFORMAT_VERSION ' "$source_path/libavformat/avformat.h" | sed 's/[^0-9\.]//g'`
lavu_version=`grep '#define LIBAVUTIL_VERSION ' "$source_path/libavutil/avutil.h" | sed 's/[^0-9\.]//g'`



if test "$lshared" = "yes" ; then
  echo "#define BUILD_SHARED_AV 1" >> $TMPH
  echo "BUILD_SHARED=yes" >> config.mak
  echo "PIC=-fPIC -DPIC" >> config.mak
  echo "SPPMAJOR=${lavc_version%%.*}" >> config.mak
  echo "SPPVERSION=$lavc_version" >> config.mak
  echo "LAVCMAJOR=${lavc_version%%.*}" >> config.mak
  echo "LAVCVERSION=$lavc_version" >> config.mak
  echo "LAVFMAJOR=${lavf_version%%.*}" >> config.mak
  echo "LAVFVERSION=$lavf_version" >> config.mak
  echo "LAVUMAJOR=${lavu_version%%.*}" >> config.mak
  echo "LAVUVERSION=$lavu_version" >> config.mak
  echo "SLIBNAME=${SLIBNAME}" >> config.mak
  echo "SLIBNAME_WITH_VERSION=${SLIBNAME_WITH_VERSION}" >> config.mak
  echo "SLIBNAME_WITH_MAJOR=${SLIBNAME_WITH_MAJOR}" >> config.mak
fi
echo "EXTRALIBS=$extralibs" >> config.mak
version=`grep '#define FFMPEG_VERSION ' "$source_path/libavcodec/avcodec.h" |
 cut -d '"' -f 2`
echo "VERSION=$version" >>config.mak
# If you do not want to use encoders, disable them.
echo "#define CONFIG_ENCODERS 1" >> $TMPH
echo "CONFIG_ENCODERS=yes" >> config.mak

# If you do not want to use decoders, disable them.
echo "#define CONFIG_DECODERS 1" >> $TMPH
echo "CONFIG_DECODERS=yes" >> config.mak

# muxers
if test "$muxers" = "yes" ; then
  echo "#define CONFIG_MUXERS 1" >> $TMPH
  echo "CONFIG_MUXERS=yes" >> config.mak
fi

# demuxers
if test "$demuxers" = "yes" ; then
  echo "#define CONFIG_DEMUXERS 1" >> $TMPH
  echo "CONFIG_DEMUXERS=yes" >> config.mak
fi

# AC3
if test "$a52" = "yes" ; then
  echo "#define CONFIG_AC3 1" >> $TMPH
  echo "CONFIG_AC3=yes" >> config.mak

  if test "$a52bin" = "yes" ; then
    echo "#define CONFIG_A52BIN 1" >> $TMPH
    echo "CONFIG_A52BIN=yes" >> config.mak
  fi
fi

# DTS
if test "$dts" = "yes" ; then
  echo "#define CONFIG_DTS 1" >> $TMPH
  echo "CONFIG_DTS=yes" >> config.mak
fi

# PP
if test "$pp" = "yes" ; then
  echo "#define CONFIG_PP 1" >> $TMPH
  echo "CONFIG_PP=yes" >> config.mak
fi

# MPEG audio high precision mode
if test "$mpegaudio_hp" = "yes" ; then
  echo "#define CONFIG_MPEGAUDIO_HP 1" >> $TMPH
fi

if test "$v4l" = "yes" ; then
  echo "#define CONFIG_VIDEO4LINUX 1" >> $TMPH
  echo "CONFIG_VIDEO4LINUX=yes" >> config.mak
fi

if test "$v4l2" = "yes" ; then
  echo "#define CONFIG_VIDEO4LINUX2 1" >> $TMPH
  echo "CONFIG_VIDEO4LINUX2=yes" >> config.mak
fi

if test "$bktr" = "yes" ; then
  echo "#define CONFIG_BKTR 1" >> $TMPH
  echo "CONFIG_BKTR=yes" >> config.mak
fi

if test "$dv1394" = "yes" ; then
  echo "#define CONFIG_DV1394 1" >> $TMPH
  echo "CONFIG_DV1394=yes" >> config.mak
fi

if test "$dc1394" = "yes" ; then
  echo "#define CONFIG_DC1394 1" >> $TMPH
  echo "CONFIG_DC1394=yes" >> config.mak
fi

if test "$dlopen" = "yes" ; then
  echo "#define CONFIG_HAVE_DLOPEN 1" >> $TMPH
fi

if test "$dlfcn" = "yes" ; then
  echo "#define CONFIG_HAVE_DLFCN 1" >> $TMPH
fi

if test "$audio_oss" = "yes" ; then
  echo "#define CONFIG_AUDIO_OSS 1" >> $TMPH
  echo "CONFIG_AUDIO_OSS=yes" >> config.mak
fi

if test "$audio_beos" = "yes" ; then
  echo "#define CONFIG_AUDIO_BEOS 1" >> $TMPH
  echo "CONFIG_AUDIO_BEOS=yes" >> config.mak
fi

if test "$network" = "yes" ; then
  echo "#define CONFIG_NETWORK 1" >> $TMPH
  echo "CONFIG_NETWORK=yes" >> config.mak
fi

if test "$ipv6" = "yes" ; then
  echo "#define CONFIG_IPV6 1" >> $TMPH
fi

if test "$zlib" = "yes" ; then
  echo "#define CONFIG_ZLIB 1" >> $TMPH
  echo "CONFIG_ZLIB=yes" >> config.mak
fi

if test "$lzo" = "yes" ; then
  echo "#define CONFIG_LZO 1" >> $TMPH
  echo "CONFIG_LZO=yes" >> config.mak
fi

if test "$libgsm" = "yes" ; then
  echo "#define CONFIG_LIBGSM 1" >> $TMPH
  echo "CONFIG_LIBGSM=yes" >> config.mak
fi

if test "$mp3lame" = "yes" ; then
  echo "#define CONFIG_MP3LAME 1" >> $TMPH
  echo "CONFIG_MP3LAME=yes" >> config.mak
fi

if test "$libogg" = "yes" ; then
  echo "#define CONFIG_LIBOGG 1" >> $TMPH
  echo "CONFIG_LIBOGG=yes" >> config.mak
fi

if test "$vorbis" = "yes" ; then
  echo "#define CONFIG_LIBVORBIS 1" >> $TMPH
  echo "CONFIG_LIBVORBIS=yes" >> config.mak
fi

if test "$theora" = "yes" ; then
  echo "#define CONFIG_LIBTHEORA 1" >> $TMPH
  echo "CONFIG_LIBTHEORA=yes" >> config.mak
fi

if test "$faad" = "yes" ; then
  echo "#define CONFIG_FAAD 1" >> $TMPH
  echo "CONFIG_FAAD=yes" >> config.mak
fi

if test "$faadbin" = "yes" ; then
  echo "#define CONFIG_FAADBIN 1" >> $TMPH
  echo "CONFIG_FAADBIN=yes" >> config.mak
fi

if test "$faac" = "yes" ; then
  echo "#define CONFIG_FAAC 1" >> $TMPH
  echo "CONFIG_FAAC=yes" >> config.mak
fi

if test "$xvid" = "yes" ; then
  echo "#define CONFIG_XVID 1" >> $TMPH
  echo "CONFIG_XVID=yes" >> config.mak
fi

if test "$x264" = "yes" ; then
  echo "#define CONFIG_X264 1" >> $TMPH
  echo "CONFIG_X264=yes" >> config.mak
fi

if test "$mingw32" = "yes" ; then
  echo "#define CONFIG_WIN32 1" >> $TMPH
  echo "CONFIG_WIN32=yes" >> config.mak
  echo "HAVE_W32THREADS=yes" >> config.mak
  echo "#define HAVE_W32THREADS 1" >> $TMPH
  echo "#define HAVE_THREADS 1" >> $TMPH
  echo "#ifndef __MINGW32__" >> $TMPH
  echo "#define __MINGW32__ 1" >> $TMPH
  echo "#endif" >> $TMPH
fi

if test "$mingwce" = "yes" ; then
  echo "#define CONFIG_WIN32 1" >> $TMPH
  echo "CONFIG_WIN32=yes" >> config.mak
  echo "#define CONFIG_WINCE 1" >> $TMPH
  echo "CONFIG_WINCE=yes" >> config.mak
  echo "#ifndef __MINGW32__" >> $TMPH
  echo "#define __MINGW32__ 1" >> $TMPH
  echo "#endif" >> $TMPH
fi

if test "$os2" = "yes" ; then
  echo "#define CONFIG_OS2 1" >> $TMPH
  echo "CONFIG_OS2=yes" >> config.mak
  echo "HAVE_OS2THREADS=yes" >> config.mak
  echo "#define HAVE_OS2THREADS 1" >> $TMPH
  echo "#define HAVE_THREADS 1" >> $TMPH
fi

if test "$TARGET_OS" = "SunOS" ; then
  echo "#define CONFIG_SUNOS 1" >> $TMPH
fi

if test "$TARGET_OS" = "BeOS" ; then
  echo "HAVE_BEOSTHREADS=yes" >> config.mak
  echo "#define HAVE_BEOSTHREADS 1" >> $TMPH
  echo "#define HAVE_THREADS 1" >> $TMPH
fi

if test "$darwin" = "yes"; then
  echo "#define CONFIG_DARWIN 1"  >> $TMPH
  echo "CONFIG_DARWIN=yes" >> config.mak
fi

if test "$_malloc_h" = "yes" ; then
  echo "#define HAVE_MALLOC_H 1" >> $TMPH
else
  echo "#undef  HAVE_MALLOC_H" >> $TMPH
fi

if test "$_memalign" = "yes" ; then
  echo "#define HAVE_MEMALIGN 1" >> $TMPH
else
  echo "#undef  HAVE_MEMALIGN" >> $TMPH
fi

if test "$memalignhack" = "yes" ; then
  echo "#define MEMALIGN_HACK 1" >> $TMPH
fi


if test "$netserver" = "yes" ; then
  echo "#define CONFIG_BEOS_NETSERVER 1" >> $TMPH
  echo "CONFIG_BEOS_NETSERVER=yes" >> config.mak
fi

if test "$need_inet_aton" = "yes" ; then
  echo "NEED_INET_ATON=yes" >> config.mak
fi

if test "$simpleidct" = "yes" ; then
  echo "#define SIMPLE_IDCT 1" >> $TMPH
fi

if test "$protocols" = "yes" ; then
  echo "#define CONFIG_PROTOCOLS 1" >> $TMPH
  echo "CONFIG_PROTOCOLS=yes" >> config.mak
fi

if test "$ffserver" = "yes" ; then
  echo "#define CONFIG_FFSERVER 1" >> $TMPH
  echo "CONFIG_FFSERVER=yes" >> config.mak
fi

if test "$ffplay" = "yes" ; then
  echo "CONFIG_FFPLAY=yes" >> config.mak
fi

if test "$gpl" = "yes" ; then
  echo "#define CONFIG_GPL 1" >> $TMPH
  echo "CONFIG_GPL=yes" >> config.mak
fi

echo "#define restrict $_restrict" >> $TMPH

if test "$optimize" = "small"; then
  echo "#define always_inline"  >> $TMPH
fi

# build tree in object directory if source path is different from current one
if test "$source_path_used" = "yes" ; then
    DIRS="\
         doc \
         libavformat \
         libavcodec \
         libavcodec/alpha \
         libavcodec/armv4l \
         libavcodec/i386 \
         libavcodec/sparc \
         libavcodec/mlib \
         libavcodec/ppc \
         libavcodec/liba52 \
         libavcodec/libpostproc \
         libavutil \
         tests \
         vhook \
         "
    FILES="\
          Makefile \
          libavformat/Makefile \
          libavcodec/Makefile \
          libavcodec/libpostproc/Makefile \
          libavutil/Makefile \
          tests/Makefile \
          vhook/Makefile \
          doc/Makefile \
          doc/texi2pod.pl \
          "
    for dir in $DIRS ; do
            mkdir -p $dir
    done
    for f in $FILES ; do
        ln -sf "$source_path/$f" $f
    done
fi
echo "SRC_PATH=$source_path" >> config.mak
echo "BUILD_ROOT=$PWD" >> config.mak

if test "$amr_wb" = "yes" ; then
  echo "#define AMR_WB 1" >> $TMPH
  echo "AMR_WB=yes" >> config.mak
  echo
  echo "AMR WB FLOAT NOTICE ! Make sure you have downloaded TS26.204"
  echo "V5.1.0 from "
  echo "http://www.3gpp.org/ftp/Specs/archive/26_series/26.204/26204-510.zip"
  echo "and extracted the source to libavcodec/amrwb_float"
  echo
fi

if test "$amr_nb" = "yes" ; then
  echo "#define AMR_NB 1" >> $TMPH
  echo "AMR_NB=yes" >> config.mak
  echo
if test "$amr_nb_fixed" = "yes" ; then
  echo "AMR_NB_FIXED=yes" >> config.mak
  echo "#define AMR_NB_FIXED 1" >> $TMPH
  echo "AMR NB FIXED POINT NOTICE! Make sure you have downloaded TS26.073 "
  echo "REL-5 version 5.1.0 from "
  echo "http://www.3gpp.org/ftp/Specs/latest/Rel-5/26_series/26073-5??.zip"
  echo "and extracted src to libavcodec/amr"
  echo "You must also add -DMMS_IO and remove -pedantic-errors to/from CFLAGS in libavcodec/amr/makefile."
  echo "i.e. CFLAGS = -Wall -I. \$(CFLAGS_\$(MODE)) -D\$(VAD) -DMMS_IO"
  echo
else
  echo "AMR NB FLOAT NOTICE ! Make sure you have downloaded TS26.104"
  echo "REL-5 V5.1.0 from "
  echo "http://www.3gpp.org/ftp/Specs/latest/Rel-5/26_series/26104-5??.zip"
  echo "and extracted the source to libavcodec/amr_float"
  echo "and if u try this on an alpha, u may need to change Word32 to int in amr/typedef.h"
  echo
fi

if test "$amr_if2" = "yes" ; then
  echo "AMR_CFLAGS=-DIF2=1" >> config.mak
fi

fi

for codec in $CODEC_LIST ; do
    echo "#define CONFIG_`echo $codec | tr a-z A-Z` 1" >> $TMPH
    echo "CONFIG_`echo $codec | tr a-z A-Z`=yes" >> config.mak
done

# Do not overwrite config.h if unchanged to avoid superfluous rebuilds.
diff $TMPH config.h >/dev/null 2>&1
if test "$?" != "0" ; then
        mv -f $TMPH config.h
else
        echo "config.h is unchanged"
fi

rm -f $TMPO $TMPC $TMPE $TMPS $TMPH


# build pkg-config files libav*.pc and libpostproc.pc
# libavutil.pc
cat <<EOF >libavutil.pc
prefix=$prefix
exec_prefix=\${prefix}
libdir=\${exec_prefix}/lib
includedir=\${prefix}/include

Name: libavutil
Description: FFmpeg utility library
Version: $lavu_version
Requires:
Conflicts:
Libs: -L\${libdir} -lavutil
Cflags: -I\${includedir} -I\${includedir}/ffmpeg
EOF

cat <<EOF >libavutil-uninstalled.pc
prefix=
exec_prefix=
libdir=\${pcfiledir}/libavutil
includedir=\${pcfiledir}/libavutil

Name: libavutil
Description: FFmpeg utility library
Version: $lavu_version
Requires:
Conflicts:
Libs: \${libdir}/${LIBPREF}avutil${LIBSUF}
Cflags: -I\${includedir}
EOF

# libavcodec.pc
cat <<EOF >libavcodec.pc
prefix=$prefix
exec_prefix=\${prefix}
libdir=\${exec_prefix}/lib
includedir=\${prefix}/include

Name: libavcodec
Description: FFmpeg codec library
Version: $lavc_version
Requires: $pkg_requires libavutil = $lavu_version
Conflicts:
Libs: -L\${libdir} -lavcodec $extralibs
Cflags: -I\${includedir} -I\${includedir}/ffmpeg
EOF

cat <<EOF >libavcodec-uninstalled.pc
prefix=
exec_prefix=
libdir=\${pcfiledir}/libavcodec
includedir=\${pcfiledir}/libavcodec

Name: libavcodec
Description: FFmpeg codec library
Version: $lavc_version
Requires: $pkg_requires libavutil = $lavu_version
Conflicts:
Libs: \${libdir}/${LIBPREF}avcodec${LIBSUF} $extralibs
Cflags: -I\${includedir}
EOF

# libavformat.pc
cat <<EOF >libavformat.pc
prefix=$prefix
exec_prefix=\${prefix}
libdir=\${exec_prefix}/lib
includedir=\${prefix}/include

Name: libavformat
Description: FFmpeg container format library
Version: $lavf_version
Requires: $pkg_requires libavcodec = $lavc_version
Conflicts:
Libs: -L\${libdir} -lavformat $extralibs
Cflags: -I\${includedir} -I\${includedir}/ffmpeg
EOF

cat <<EOF >libavformat-uninstalled.pc
prefix=
exec_prefix=
libdir=\${pcfiledir}/libavformat
includedir=\${pcfiledir}/libavformat

Name: libavformat
Description: FFmpeg container format library
Version: $lavf_version
Requires: $pkg_requires libavcodec = $lavc_version
Conflicts:
Libs: \${libdir}/${LIBPREF}avformat${LIBSUF} $extralibs
Cflags: -I\${includedir}
EOF


# libpostproc.pc
cat <<EOF >libpostproc.pc
prefix=$prefix
exec_prefix=\${prefix}
libdir=\${exec_prefix}/lib
includedir=\${prefix}/include

Name: libpostproc
Description: FFmpeg post processing library
Version: $lavc_version
Requires:
Conflicts:
Libs: -L\${libdir} -lpostproc
Cflags: -I\${includedir} -I\${includedir}/postproc
EOF

cat <<EOF >libpostproc-uninstalled.pc
prefix=
exec_prefix=
libdir=\${pcfiledir}/libavcodec/libpostproc
includedir=\${pcfiledir}/libavcodec/libpostproc

Name: libpostproc
Description: FFmpeg post processing library
Version: $lavc_version
Requires:
Conflicts:
Libs: \${libdir}/${LIBPREF}postproc${LIBSUF}
Cflags: -I\${includedir}
EOF