compy/transcoder/jpeg.go

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2015-03-28 22:07:40 +00:00
package transcoder
import (
"github.com/barnacs/compy/proxy"
"github.com/pixiv/go-libjpeg/jpeg"
)
type Jpeg struct {
decOptions *jpeg.DecoderOptions
encOptions *jpeg.EncoderOptions
}
func NewJpeg(quality int) *Jpeg {
return &Jpeg{
decOptions: &jpeg.DecoderOptions{},
encOptions: &jpeg.EncoderOptions{
Quality: quality,
OptimizeCoding: true,
},
}
}
func (t *Jpeg) Transcode(w *proxy.ResponseWriter, r *proxy.ResponseReader) error {
img, err := jpeg.Decode(r, t.decOptions)
if err != nil {
return err
}
if err = jpeg.Encode(w, img, t.encOptions); err != nil {
return err
}
return nil
}