gomp/imageUtils.go

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package main
import (
"image"
"os"
"strings"
"github.com/bogem/id3v2"
"github.com/mewkiz/flac"
"github.com/mewkiz/flac/meta"
"github.com/nfnt/resize"
"github.com/spf13/viper"
)
func GetMp3Image(songPath, imagePath string) string {
tag, err := id3v2.Open(songPath, id3v2.Options{Parse: true})
if err != nil {
return ""
}
defer tag.Close()
if err != nil {
return ""
}
// Read tags.
Frames := tag.GetFrames(tag.CommonID("Attached picture"))
var ImageData []byte
for _, er := range Frames {
pic, ok := er.(id3v2.PictureFrame)
if ok {
for _, i := range pic.Picture {
ImageData = append(ImageData, byte(i))
}
imageHandler, err := os.Create(imagePath)
if err != nil {
return ""
} else {
imageHandler.Write(ImageData)
return imagePath
}
}
}
return ""
}
func GetFlacImage(songPath, imagePath string) string {
stream, err := flac.ParseFile(songPath)
if err != nil {
return ""
}
defer stream.Close()
for _, block := range stream.Blocks {
if block.Type == meta.TypePicture {
pic := block.Body.(*meta.Picture)
if pic.Type == 3 {
imageHandler, err := os.Create(imagePath)
if err != nil {
return ""
}
imageHandler.Write(pic.Data)
return imagePath
}
}
}
return ""
}
func extractImageFromFile(uri string, imagePath string) string {
if strings.HasSuffix(uri, ".mp3") {
imagePath := GetMp3Image(uri, imagePath)
if imagePath == "" {
return viper.GetString("DEFAULT_IMAGE_PATH")
} else {
return imagePath
}
} else if strings.HasSuffix(uri, ".flac") {
imagePath := GetFlacImage(uri, imagePath)
if imagePath == "" {
return viper.GetString("DEFAULT_IMAGE_PATH")
} else {
return imagePath
}
} else {
return viper.GetString("DEFAULT_IMAGE_PATH")
}
}
func getImg(uri string) (image.Image, error) {
f, err := os.Open(uri)
if err != nil {
return nil, err
}
defer f.Close()
img, _, err := image.Decode(f)
if err != nil {
return nil, err
}
fw, fh := getFontWidth()
img = resize.Resize(
uint(float32(IMG_W)*(fw+float32(viper.GetFloat64("IMAGE_WIDTH_EXTRA_X")))), uint(float32(IMG_H)*(fh+float32(viper.GetFloat64("IMAGE_WIDTH_EXTRA_Y")))),
img,
resize.Bilinear,
)
return img, nil
}