gstreamer-graphix/gstreamer/utils.go

package gstreamer

import (
	"fmt"
	"github.com/rs/zerolog"
	"github.com/tinyzimmer/go-gst/gst"
	"strings"
)

func setPropertyWrapper(element *gst.Element, name string, value interface{}) {
	element.SetArg(name, fmt.Sprintf("%v", value))
}

func (element1 *element) linkElementWrapper(element2 *element, log zerolog.Logger, capabilities ...string) error {
	var err error
	var caps string
	if len(capabilities) > 0 {
		caps = strings.Join(capabilities, ", ")
	}
	if len(element1.outputCaps) > 0 {
		if caps != "" {
			log.Error().Str("action", "linking").Str("element1", element1.name).Str("element2", element2.name).Msg("element1 has output caps but you specified already caps so i'm only using them")
		} else {
			caps = strings.Join(element1.outputCaps, ",")
		}
	}
	if len(element2.inputCaps) > 0 {
		if caps != "" {
			log.Error().Str("action", "linking").Str("element1", element1.name).Str("element2", element2.name).Msg("element2 has input caps but you specified already caps so i'm only using them")
		} else {
			caps = strings.Join(element2.inputCaps, ",")
		}
	}
	if len(caps) > 0 {
		log.Debug().Msgf("Linking %s to %s with caps %s", element1.name, element2.name, caps)
		capabilities := gst.NewCapsFromString(caps)
		err = element1.element.LinkFiltered(element2.element, capabilities)
	} else {
		err = element1.element.Link(element2.element)

	}
	if err != nil {
		log.Error().Msgf("could not link %s to %s: %v", element1.name, element2.name, err)
		return err
	}
	element1.next, element2.prev = element2.name, element1.name

	return nil
}