110 lines
2.7 KiB
Go
110 lines
2.7 KiB
Go
package gstreamer
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import (
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"fmt"
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"github.com/rs/zerolog"
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"github.com/tinyzimmer/go-gst/gst"
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"strconv"
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"strings"
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"time"
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)
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func (o *TextOverlay) create(log zerolog.Logger) (*gst.Element, error) {
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e, err := gst.NewElementWithName("textoverlay", o.Name)
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if err != nil {
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log.Error().Msgf("could not create element %s: %v\n", o.Name, err)
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return nil, fmt.Errorf("could not create element %s", o.Name)
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}
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setPropertyWrapper(e, "draw-outline", false)
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setPropertyWrapper(e, "draw-shadow", false)
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setPropertyWrapper(e, "halignment", "0") //left
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setPropertyWrapper(e, "valignment", "2") //top
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setPropertyWrapper(e, "deltax", o.X)
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setPropertyWrapper(e, "deltay", o.Y)
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setPropertyWrapper(e, "color", o.Color)
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setPropertyWrapper(e, "font-desc", fmt.Sprintf("%s, %s %v", o.Font, o.FontWeight, o.FontSize))
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setPropertyWrapper(e, "text", o.Value)
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if o.Display {
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o.show()
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} else {
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o.hide()
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}
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o.element = e
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return e, nil
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}
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func (o *TextOverlay) update(log zerolog.Logger) {
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text, _ := o.element.GetProperty("text")
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if text != o.Value {
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setPropertyWrapper(o.element, "text", o.Value)
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setPropertyWrapper(o.element, "font-desc", fmt.Sprintf("Fira Sans, %s %v", o.FontWeight, o.FontSize))
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}
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setPropertyWrapper(o.element, "deltax", o.X)
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setPropertyWrapper(o.element, "deltay", o.Y)
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if o.Display {
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o.show()
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} else {
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o.hide()
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}
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o.resizeTextOverlay(log)
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}
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func (o *TextOverlay) show() gst.ClockCallback {
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return func(clock *gst.Clock, clockTime time.Duration) bool {
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setPropertyWrapper(o.element, "silent", 0)
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return true
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}
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}
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func (o *TextOverlay) hide() gst.ClockCallback {
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return func(clock *gst.Clock, clockTime time.Duration) bool {
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setPropertyWrapper(o.element, "silent", 1)
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return true
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}
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}
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func (o *TextOverlay) getName() string {
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return o.Name
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}
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func (o *TextOverlay) resizeTextOverlay(log zerolog.Logger) {
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if o.MaxWidth == 0 {
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return
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}
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width, _ := o.element.GetProperty("text-width")
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for width.(uint) >= o.MaxWidth {
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log.Debug().Str("name", o.Name).Uint("width", width.(uint)).Uint("max-width", o.MaxWidth).Msg("Shrinking Textoverlay")
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fontdesc, _ := o.element.GetProperty("font-desc")
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fd := strings.Fields(fontdesc.(string))
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fontsize, _ := strconv.Atoi(fd[len(fd)-1])
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setPropertyWrapper(o.element, "font-desc", fmt.Sprintf("%s, %s %v", o.Font, o.FontWeight, fontsize-1))
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time.Sleep(time.Millisecond * 60)
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width, _ = o.element.GetProperty("text-width")
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}
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}
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func (o TextOverlay) getBlendInTime() time.Duration {
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return o.BlendIn
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}
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func (o TextOverlay) getBlendOutTime() time.Duration {
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return o.BlendOut
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}
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func (o *TextOverlay) getElement() *gst.Element {
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return o.element
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}
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func (o *TextOverlay) setElement(element *gst.Element) {
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o.element = element
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}
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func (o *TextOverlay) getType() string {
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return "textoverlay"
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}
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