FFVER=2.7.2
#FFVER=1.2.12

BUILD_SHARED_LIBS=ON

export MAKEFLAGS=-j16

wget http://www.tortall.net/projects/yasm/releases/yasm-1.3.0.tar.gz
tar -xf yasm-1.3.0.tar.gz
cd yasm-1.3.0
./configure --prefix="$(pwd)/.."
make && make install
cd ..

wget http://ffmpeg.org/releases/ffmpeg-$FFVER.tar.bz2
tar -xf ffmpeg-$FFVER.tar.bz2
cd ffmpeg-$FFVER
./configure --prefix="$(pwd)/.." --yasmexe="$(pwd)/../bin/yasm" $([ $BUILD_SHARED_LIBS = ON ] && echo "--enable-shared --enable-pic")
make && make install
cd ..

wget http://downloads.sourceforge.net/project/opencvlibrary/opencv-unix/2.4.11/opencv-2.4.11.zip
unzip opencv-2.4.11.zip
cd opencv-2.4.11
mkdir build && cd build

# for custom ffmpeg discovery
export LD_LIBRARY_PATH=$(pwd)/../../lib:$LD_LIBRARY_PATH
export PKG_CONFIG_PATH=$(pwd)/../../lib/pkgconfig

cmake -D CMAKE_INSTALL_PREFIX="$(pwd)/../.." -D CMAKE_BUILD_TYPE=RELEASE -D BUILD_SHARED_LIBS=$BUILD_SHARED_LIBS -D BUILD_TESTS=OFF -D BUILD_PERF_TESTS=OFF -D BUILD_EXAMPLES=OFF -D BUILD_opencv_gpu=OFF -D BUILD_opencv_python=OFF -D BUILD_opencv_java=OFF -D BUILD_opencv_ml=OFF -D BUILD_opencv_contrib=OFF -D BUILD_opencv_ocl=OFF -D BUILD_opencv_legacy=OFF -D BUILD_opencv_nonfree=OFF -D BUILD_opencv_photo=OFF -D BUILD_opencv_video=OFF -D BUILD_opencv_stitching=OFF -D BUILD_opencv_superres=OFF -D BUILD_opencv_photo=OFF -D BUILD_opencv_objdetect=OFF -D BUILD_opencv_features2d=OFF -D BUILD_opencv_calib3d=OFF -D WITH_CUDA=OFF -D WITH_JASPER=OFF -D WITH_TIFF=OFF -D WITH_JPEG=OFF -D WITH_OPENEXR=OFF ..
make && make install
ln -s "$(pwd)/3rdparty/lib/liblibpng.a" "$(pwd)/../../lib/libpng.a"