QtAV/scripts/build_ffmpeg.sh

#/bin/bash

# Author: wbsecg1@gmail.com 2013-2014

# Put this script in ffmpeg source dir. Make sure your build environment is correct. Then run "./build_ffmpeg.sh"
# To build ffmpeg for android, run "./build_ffmpeg android". default is armv7-a.

PLATFORMS="android|maemo5|maemo6|vc"
echo "Put this script in ffmpeg source dir. Make sure your build environment is correct."
echo "usage: ./build_ffmpeg.sh [${PLATFORMS}]"
echo "(optional) set var in config-xxx.sh, xxx is ${PLATFORMS//|/, }"
echo "var can be: INSTALL_DIR, NDK_ROOT, MAEMO5_SYSROOT, MAEMO6_SYSROOT"
echo "Author: wbsecg1@gmail.com 2013-2014"
# TODO: PLATFORM=xxx TARGET=ooo TOOLCHAIN=ttt ./build_ffmpeg.sh

TAGET_FLAG=$1

if [ -n "$TAGET_FLAG" ]; then
  USER_CONFIG=config-${TAGET_FLAG}.sh
  test -f $USER_CONFIG &&  . $USER_CONFIG
fi

: ${INSTALL_DIR:=sdk}
# set NDK_ROOT if compile for android
: ${NDK_ROOT:="/devel/android/android-ndk-r8e"}
: ${MAEMO5_SYSROOT:=/opt/QtSDK/Maemo/4.6.2/sysroots/fremantle-arm-sysroot-20.2010.36-2-slim}
: ${MAEMO6_SYSROOT:=/opt/QtSDK/Madde/sysroots/harmattan_sysroot_10.2011.34-1_slim}




#host_is
function platform_is() {
  local name=$1
#TODO: osx=>darwin
  local line=`uname -a |grep -i $name`
  test -n "$line" && return 0 || return 1
}
function target_is() {
  test "$TAGET_FLAG" = "$1" && return 0 || return 1
}
function is_libav() {
  test "${PWD/libav*/}" = "$PWD" && return 1 || return 0
}

#CPU_FLAGS=-mmmx -msse -mfpmath=sse
#ffmpeg 2.x autodetect dxva, vaapi, vdpau. manually enable vda
DXVA="--enable-dxva2" #  --enable-hwaccel=h264_dxva2 --enable-hwaccel=mpeg2_dxva2 --enable-hwaccel=vc1_dxva2 --enable-hwaccel=wmv3_dxva2"
VAAPI="--enable-vaapi" # --enable-hwaccel=h263_vaapi --enable-hwaccel=h264_vaapi --enable-hwaccel=mpeg2_vaapi --enable-hwaccel=mpeg4_vaapi --enable-hwaccel=vc1_vaapi --enable-hwaccel=wmv3_vaapi"
VDPAU="--enable-vdpau" # --enable-hwaccel=h263_vdpau --enable-hwaccel=h264_vdpau --enable-hwaccel=mpeg1_vdpau --enable-hwaccel=mpeg2_vdpau --enable-hwaccel=mpeg4_vdpau --enable-hwaccel=vc1_vdpau --enable-hwaccel=wmv3_vdpau"
VDA="--enable-vda" # --enable-hwaccel=h264_vda"


function setup_vc_env() {
# http://ffmpeg.org/platform.html#Microsoft-Visual-C_002b_002b-or-Intel-C_002b_002b-Compiler-for-Windows
  TOOLCHAIN_OPT=
  PLATFORM_OPT="--toolchain=msvc"
  CL_INFO=`cl 2>&1 |grep -i Microsoft`
  CL_VER=`echo $CL_INFO |sed 's,.* \([0-9]*\)\.[0-9]*\..*,\1,g'`
  echo "cl version: $CL_VER"
  if [ -n "`echo $CL_INFO |grep -i x86`" ]; then
    echo "vc x86"
    test $CL_VER -gt 16 && echo "adding windows xp compatible link flags..." && PLATFORM_OPT="$PLATFORM_OPT --extra-ldflags=\"-SUBSYSTEM:CONSOLE,5.01\""
  elif [ -n "`echo $CL_INFO |grep -i x64`" ]; then
    echo "vc x64"
    test $CL_VER -gt 16 && echo "adding windows xp compatible link flags..." && PLATFORM_OPT="$PLATFORM_OPT --extra-ldflags=\"-SUBSYSTEM:CONSOLE,5.02\""
  elif [ -n "`echo $CL_INFO |grep -i arm`" ]; then
    echo "vc arm"
    # http://www.cnblogs.com/zjjcy/p/3384517.html  http://www.cnblogs.com/zjjcy/p/3499848.html
    # armasm: http://www.cnblogs.com/zcmmwbd/p/windows-phone-8-armasm-guide.html#2842650
    # TODO: use a wrapper function to deal with the parameters passed to armasm
    PLATFORM_OPT="--extra-cflags=\"-D_ARM_WINAPI_PARTITION_DESKTOP_SDK_AVAILABLE -D_M_ARM -DWINAPI_FAMILY=WINAPI_FAMILY_APP\" --extra-ldflags=\"-MACHINE:ARM\" $PLATFORM_OPT --enable-cross-compile --arch=arm --cpu=armv7 --target-os=win32 --as=armasm --disable-yasm --disable-inline-asm"
  fi
}

function setup_icc_env() {
  TOOLCHAIN_OPT=
  PLATFORM_OPT="--toolchain=icl"
}

function setup_wince_env() {
  WINCEOPT="--enable-cross-compile --cross-prefix=arm-mingw32ce- --target-os=mingw32ce --arch=arm --cpu=arm"
  PLATFORM_OPT="$WINCEOPT"
  INSTALL_DIR=sdk-wince
}

function setup_android_env() {
# flags are from https://github.com/yixia/FFmpeg-Android
  ANDROID_TOOLCHAIN="/tmp/ndk-toolchain" #$NDK_ROOT/toolchains/arm-linux-androideabi-4.7/prebuilt/linux-x86_64/bin
  ANDROID_SYSROOT="$ANDROID_TOOLCHAIN/sysroot" #"$NDK_ROOT/platforms/android-14/arch-arm"

  ANDROID_CFLAGS="-O3 -Wall -mthumb -pipe -fpic -fasm \
  -fstrict-aliasing -Werror=strict-aliasing \
  -fmodulo-sched -fmodulo-sched-allow-regmoves \
  -Wno-psabi -Wa,--noexecstack \
  -D__ARM_ARCH_5__ -D__ARM_ARCH_5E__ -D__ARM_ARCH_5T__ -D__ARM_ARCH_5TE__ \
  -DANDROID -DNDEBUG"
  ANDROID_CLFAGS_NEON="-march=armv7-a -mfpu=neon -mfloat-abi=softfp -mvectorize-with-neon-quad"
  ANDROID_CFLAGS_ARMV7="-march=armv7-a -mfpu=vfpv3-d16 -mfloat-abi=softfp"
  ANDROID_CFLAGS_VFP="-march=armv6 -mfpu=vfp -mfloat-abi=softfp"
  ANDROID_CFLAGS_ARMV6="-march=armv6"
  ANDROID_LDFLAGS_ARMV7="-Wl,--fix-cortex-a8"
  ANDROIDOPT="--enable-cross-compile --cross-prefix=arm-linux-androideabi- --target-os=linux --arch=arm --sysroot=$ANDROID_SYSROOT --extra-ldflags=\"$ANDROID_LDFLAGS_ARMV7\""

  $NDK_ROOT/build/tools/make-standalone-toolchain.sh --platform=android-14 --install-dir=$ANDROID_TOOLCHAIN --system=linux-x86_64
  export PATH=$ANDROID_TOOLCHAIN/bin:$PATH
  rm -r $ANDROID_SYSROOT/usr/include/{libsw*,libav*}
  rm -r $ANDROID_SYSROOT/usr/lib/{libsw*,libav*}

  PLATFORM_OPT="$ANDROIDOPT"
  EXTRA_CFLAGS="$ANDROID_CFLAGS $ANDROID_CLFAGS_ARMV7"
  INSTALL_DIR=sdk-android
}

function setup_maemo5_env() {
#--arch=armv7l --cpu=armv7l
#CLANG=clang
  if [ -n "$CLANG" ]; then
    CLANG_CFLAGS="-target arm-none-linux-gnueabi"
    CLANG_LFLAGS="-target arm-none-linux-gnueabi"
    HOSTCC=clang
    MAEMO_OPT="--host-cc=$HOSTCC --cc=$HOSTCC --enable-cross-compile  --target-os=linux --arch=armv7-a --sysroot=$MAEMO5_SYSROOT"
  else
    HOSTCC=gcc
    MAEMO_OPT="--host-cc=$HOSTCC --cross-prefix=arm-none-linux-gnueabi- --enable-cross-compile --target-os=linux --arch=armv7-a --sysroot=$MAEMO5_SYSROOT"
  fi
  PLATFORM_OPT="$MAEMO_OPT"
  INSTALL_DIR=sdk-maemo5
}
function setup_maemo6_env() {
#--arch=armv7l --cpu=armv7l
#CLANG=clang
  if [ -n "$CLANG" ]; then
    CLANG_CFLAGS="-target arm-none-linux-gnueabi"
    CLANG_LFLAGS="-target arm-none-linux-gnueabi"
    HOSTCC=clang
    MAEMO_OPT="--host-cc=$HOSTCC --cc=$HOSTCC --enable-cross-compile  --target-os=linux --arch=armv7-a --sysroot=$MAEMO6_SYSROOT"
  else
    HOSTCC=gcc
    MAEMO_OPT="--host-cc=$HOSTCC --cross-prefix=arm-none-linux-gnueabi- --enable-cross-compile --target-os=linux --arch=armv7-a --sysroot=$MAEMO6_SYSROOT"
  fi
  PLATFORM_OPT="$MAEMO_OPT"
  INSTALL_DIR=sdk-maemo6
}

platform_is Darwin && PLATFORM_OPT="$VDA --cc=clang --cxx=clang++"
platform_is Linux && PLATFORM_OPT="$VAAPI $VDPAU"
platform_is MinGW && PLATFORM_OPT="$DXVA"
platform_is MSYS && PLATFORM_OPT="$DXVA"

target_is android && setup_android_env
target_is maemo5 && setup_maemo5_env
target_is maemo6 && setup_maemo6_env

TOOLCHAIN_OPT="--disable-iconv --extra-cflags=\"-O3 $CLANG_CFLAGS $EXTRA_CFLAGS\""

target_is vc && setup_vc_env

CONFIGURE="./configure --disable-static --enable-shared --enable-runtime-cpudetect --enable-avresample --disable-muxers --disable-encoders --enable-hwaccels $PLATFORM_OPT $TOOLCHAIN_OPT"


echo $CONFIGURE

time eval $CONFIGURE
if [ $? -eq 0 ]; then
  time (make -j4 install prefix="$INSTALL_DIR")
fi
  
  

# --enable-pic is default  --enable-lto
#http://cmzx3444.iteye.com/blog/1447366
#--enable-openssl  --enable-hardcoded-tables  --enable-librtmp --enable-zlib