README.md

GoHeif - A go gettable decoder/converter for HEIC based on libde265

Install

• heic2jpg to convert HEIC files to JPG preserving exif

go get github.com/jdeng/goheif/...

• Tested

  • Mac OS X (High Sierra)
  • Linux (Ubuntu 16.04 / GCC 5.4)
  • Windows 7 64bit with TDM-GCC 32 (GCC 5.1) and golang 1.12 windows/386

• Code Sample

func main() {
	flag.Parse()
	...
  
	fin, fout := flag.Arg(0), flag.Arg(1)
	fi, err := os.Open(fin)
	if err != nil {
		log.Fatal(err)
	}
	defer fi.Close()

	exif, err := goheif.ExtractExif(fi)
	if err != nil {
		log.Printf("Warning: no EXIF from %s: %v\n", fin, err)
	}

	img, err := goheif.Decode(fi)
	if err != nil {
		log.Fatalf("Failed to parse %s: %v\n", fin, err)
	}

	fo, err := os.OpenFile(fout, os.O_RDWR|os.O_CREATE, 0644)
	if err != nil {
		log.Fatalf("Failed to create output file %s: %v\n", fout, err)
	}
	defer fo.Close()

	w, _ := newWriterExif(fo, exif)
	err = jpeg.Encode(w, img, nil)
	if err != nil {
		log.Fatalf("Failed to encode %s: %v\n", fout, err)
	}

	log.Printf("Convert %s to %s successfully\n", fin, fout)
}

What is done

• Changes make to @bradfitz's (https://github.com/bradfitz) golang heif parser

  • Some minor bugfixes
  • A few new box parsers, noteably 'iref' and 'hvcC'

• Include libde265's source code (SSE by default enabled) and a simple golang binding

• A Utility heic2jpg to illustrate the usage.

License

• heif and libde265 are in their own licenses

• goheif.go, libde265 golang binding and the heic2jpg utility are in MIT license

Credits

• heif parser by @bradfitz (https://github.com/go4org/go4/tree/master/media/heif)
• libde265 (https://github.com/strukturag/libde265)
• implementation learnt from libheif (https://github.com/strukturag/libheif)

TODO

• Upstream the changes to heif?