mirror of
https://github.com/cwinfo/matterbridge.git
synced 2024-11-24 19:01:55 +00:00
52 lines
1.3 KiB
Go
52 lines
1.3 KiB
Go
|
package libtgsconverter
|
||
|
|
|
||
|
|
import "bytes"
|
||
|
|
import "image"
|
||
|
|
|
||
|
|
import "github.com/kettek/apng"
|
||
|
|
import "github.com/av-elier/go-decimal-to-rational"
|
||
|
|
|
||
|
|
type toapng struct {
|
||
|
|
apng apng.APNG
|
||
|
|
prev_frame *image.RGBA
|
||
|
|
}
|
||
|
|
|
||
|
|
func(to_apng *toapng) init(w uint, h uint, options ConverterOptions) {
|
||
|
|
}
|
||
|
|
|
||
|
|
func(to_apng *toapng) SupportsAnimation() bool {
|
||
|
|
return true
|
||
|
|
}
|
||
|
|
|
||
|
|
func (to_apng *toapng) AddFrame(image *image.RGBA, fps uint) error {
|
||
|
|
if to_apng.prev_frame != nil && sameImage(to_apng.prev_frame, image) {
|
||
|
|
var idx = len(to_apng.apng.Frames) - 1
|
||
|
|
var prev_fps = float64(to_apng.apng.Frames[idx].DelayNumerator) / float64(to_apng.apng.Frames[idx].DelayDenominator)
|
||
|
|
prev_fps += 1.0 / float64(fps)
|
||
|
|
rat := dectofrac.NewRatP(prev_fps, 0.001)
|
||
|
|
to_apng.apng.Frames[idx].DelayNumerator = uint16(rat.Num().Int64())
|
||
|
|
to_apng.apng.Frames[idx].DelayDenominator = uint16(rat.Denom().Int64())
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
f := apng.Frame{}
|
||
|
|
f.Image = image
|
||
|
|
f.DelayNumerator = 1
|
||
|
|
f.DelayDenominator = uint16(fps)
|
||
|
|
f.DisposeOp = apng.DISPOSE_OP_BACKGROUND
|
||
|
|
f.BlendOp = apng.BLEND_OP_SOURCE
|
||
|
|
f.IsDefault = false
|
||
|
|
to_apng.apng.Frames = append(to_apng.apng.Frames, f)
|
||
|
|
to_apng.prev_frame = image
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func (to_apng *toapng) Result() []byte {
|
||
|
|
var data []byte
|
||
|
|
w := bytes.NewBuffer(data)
|
||
|
|
err := apng.Encode(w, to_apng.apng)
|
||
|
|
if err != nil {
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
return w.Bytes()
|
||
|
|
}
|