func sample_chromakey(vsw *libvsw.Vsw) {
wait := 8000
vsw.CutSub(0)
vsw.Cut(1)
// You have to insert a writable SD card to LiveWedge.
vsw.UploadFile("greenback.jpg")
vsw.SetChromaKey(libvsw.CHROMA_KEY_GREEN)
vsw.CutSub(4)
time.Sleep(time.Duration(wait) * time.Millisecond)
vsw.CutSub(0)
vsw.UploadFile("blueback.jpg")
vsw.SetChromaKey(libvsw.CHROMA_KEY_BLUE)
vsw.MixSub(2000, 4)
time.Sleep(time.Duration(wait) * time.Millisecond)
vsw.MixSub(2000, 0)
vsw.UploadFile("purpleback.jpg")
vsw.SetChromaKey(libvsw.CHROMA_KEY_PURPLE)
vsw.CutSub(4)
time.Sleep(time.Duration(wait) * time.Millisecond)
vsw.CutSub(0)
vsw.UploadFile("redback.jpg")
vsw.SetChromaKey(libvsw.CHROMA_KEY_RED)
vsw.MixSub(2000, 4)
time.Sleep(time.Duration(wait) * time.Millisecond)
vsw.MixSub(2000, 0)
}
func loop(vsw *libvsw.Vsw, pa Params, notify chan Params) {
index := 0
for {
select {
case pa = <-notify:
log.Printf("got from chan\n")
saveParams(pa)
if pa.StartLiveBroadcast {
vsw.ChangeLiveBroadcastState(1)
} else {
vsw.ChangeLiveBroadcastState(0)
}
if pa.UploadStillPicture {
vsw.UploadFile(pa.Picture)
}
case <-time.After(time.Second * time.Duration(pa.Interval)):
log.Printf("periodic timer\n")
}
index = (index + 1) % 4
i := 0
for ; i < 4; i++ {
if pa.Input[i] == true {
break
}
}
if i == 4 {
// no input checked
pa.Interval = 1000000
continue
}
for pa.Input[index] == false {
index = (index + 1) % 4
}
switch pa.Trans & 0xff {
case 0:
vsw.Cut(index + 1)
case 1:
vsw.Mix(pa.Rate, index+1)
case 2:
vsw.Dip(pa.Rate, index+1, ((pa.Trans>>8)&3)+1)
case 255:
vsw.Wipe(pa.Rate, index+1, random(0, libvsw.WIPE_TYPE_NUM-1))
default:
vsw.Wipe(pa.Rate, index+1, pa.Trans-libvsw.TRANSITION_TYPE_WIPE)
}
}
}