/
main.go
201 lines (179 loc) · 4.04 KB
/
main.go
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package main
import (
"flag"
"fmt"
"image/jpeg"
"image/png"
"io/ioutil"
"log"
"os"
"os/exec"
"path"
"path/filepath"
"strings"
"github.com/lmittmann/ppm"
)
// required
const waifu2xmacCmd = "waifu2xmetal"
const opjCompressCmd = "opj_compress"
const cjpegCmd = "/usr/local/opt/mozjpeg/bin/cjpeg"
func isFileExist(path string) (bool, error) {
_, err := os.Stat(path)
if os.IsNotExist(err) {
return false, nil
}
if err != nil {
return false, err
}
return true, nil
}
func main() {
in := flag.String("i", "", "input directory")
out := flag.String("o", "", "output directory")
flag.Parse()
if *in == "" || *out == "" {
flag.Usage()
os.Exit(1)
}
log.Printf("Using %s for input, %s for output", *in, *out)
inDir, err := os.Open(*in)
if err != nil {
log.Fatal("Unable to open input directory", err)
}
defer inDir.Close()
files, err := inDir.Readdir(0)
if err != nil {
log.Fatal("Unable to read files", err)
}
for _, file := range files {
if file.IsDir() {
continue
}
if !strings.HasSuffix(strings.ToLower(file.Name()), ".jpg") {
continue
}
if strings.HasSuffix(strings.ToLower(file.Name()), ".tmp.jpg") {
continue
}
name := strings.TrimSuffix(file.Name(), path.Ext(file.Name()))
outjpg2000path := filepath.Join(*out, name) + ".jp2"
if ok, _ := isFileExist(outjpg2000path); ok {
log.Printf("File %s already upscaled", file.Name())
continue
}
err := transformFile(filepath.Join(*in, file.Name()), outjpg2000path)
if err != nil {
log.Printf("[Warning] Unable to transform: %v", err)
return
}
}
}
func transformFile(infilepath, outfilepath string) error {
tmpPNGFile, err := ioutil.TempFile("", "*.png")
if err != nil {
return err
}
tmpPNGFile.Close()
defer os.Remove(tmpPNGFile.Name())
tmpPPMFile, err := ioutil.TempFile("", "*.ppm")
if err != nil {
return err
}
tmpPPMFile.Close()
defer os.Remove(tmpPPMFile.Name())
log.Printf("Upscaling file %s", infilepath)
err = upscaleJPGToPNG(infilepath, tmpPNGFile.Name())
if err != nil {
return fmt.Errorf("unable to upscale: %v", err)
}
// err = convertPNGToJPEGMoz95(outpngpath, outjpgmozpath)
// if err != nil {
// log.Printf("Unable to convert PNG to JPEG (Moz): %v", err)
// continue
// }
// err = convertPNGToJPEGGo95(outpngpath, outjpggopath)
// if err != nil {
// log.Printf("Unable to convert PNG to JPEG (Go): %v", err)
// continue
// }
err = convertPNGToPPMGo(tmpPNGFile.Name(), tmpPPMFile.Name())
if err != nil {
return fmt.Errorf("unable to convert PNG to PPM (Go): %v", err)
}
tmpJP2Filepath := outfilepath + ".tmp.jp2"
err = os.Remove(tmpJP2Filepath)
if err != nil && os.IsExist(err) {
return err
}
defer os.Remove(tmpJP2Filepath)
err = convertPPMToJPEG2000OPJ15(tmpPPMFile.Name(), tmpJP2Filepath)
if err != nil {
return fmt.Errorf("Unable to convert PPM to JPEG2000 (OPJ): %v", err)
}
return os.Rename(tmpJP2Filepath, outfilepath)
}
func upscaleJPGToPNG(inpath, outpath string) error {
cmd := exec.Command(
waifu2xmacCmd,
"-t", "p",
"-s", "2",
"-n", "4",
"-i", inpath,
"-o", outpath,
)
return cmd.Run()
}
func convertPNGToJPEGMoz95(in, out string) error {
cmd := exec.Command(
cjpegCmd,
"-optimize",
"-progressive",
"-quality", "95",
"-outfile", out,
in,
)
return cmd.Run()
}
func convertPNGToJPEGGo95(inpath, outpath string) error {
in, err := os.Open(inpath)
if err != nil {
return err
}
defer in.Close()
img, err := png.Decode(in)
if err != nil {
return err
}
out, err := os.Create(outpath)
if err != nil {
return err
}
defer out.Close()
return jpeg.Encode(out, img, &jpeg.Options{95})
}
func convertPNGToPPMGo(inpath, outpath string) error {
in, err := os.Open(inpath)
if err != nil {
return err
}
defer in.Close()
img, err := png.Decode(in)
if err != nil {
return err
}
out, err := os.Create(outpath)
if err != nil {
return err
}
defer out.Close()
return ppm.Encode(out, img)
}
func convertPPMToJPEG2000OPJ15(inpath, outpath string) error {
cmd := exec.Command(
opjCompressCmd,
"-r", "15",
"-i", inpath,
"-o", outpath,
)
return cmd.Run()
}