#!/bin/bash
# *****************************************************************************
# @author CsHeng
# @2016.2.17 初始pngquant版本
# @2016.3.8 增加对音频的处理
#
# 使用pngquant对图片素材进行压缩，压缩后gradle脚本copyResource会将../res目录copy到目的地
# 使用lame处理mp3
# 由于pngquant/lame是需要系统额外安装的，故不将此命令写入gradle脚本
# Sample: brew install ImageMagick lame
#
# 选项：
#     -s src dir of images, default ../res
#
# *****************************************************************************

CWD=$(cd "$(dirname "$0")"; pwd)
INPUT="${CWD}/../res"
while getopts "i:0:" arg
do
	case ${arg} in
		s)
		INPUT=${OPTARG}
		;;
		?)
		echo "unknown argument"
		exit 1;
		;;
		esac
done

#find ${INPUT} -name '*.png' -exec bash -c 'echo $0 -f -o $0 & pngquant $0 -f -o $0' {} \;

# compress pngs to 8bit color, keep alpha channel
images=$(find ${INPUT} -name '*.png')
for f in ${images}
do
	echo pngquant ${f} -f -o ${f}
	pngquant ${f} -f -o ${f}
done

# convert mp3 to 64bit/44100KHz, normal is 96-128bit/44100KHz, --resample 22050 don't help
mp3s=$(find ${INPUT} -name '*.mp3')
for f in ${mp3s}
do
	echo "mv ${f} ${f}.bak & lame --mp3input -b 64 ${f}.bak ${f} & rm ${f}.bak"
	mv ${f} ${f}.bak
	lame --mp3input -b 64 ${f}.bak ${f}
	rm ${f}.bak
done