91 lines
2.3 KiB
Go
91 lines
2.3 KiB
Go
package gstreamer
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import (
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"context"
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"errors"
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"github.com/tinyzimmer/go-glib/glib"
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"github.com/tinyzimmer/go-gst/gst"
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)
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var gstreamer *Gstreamer
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func Init() *Gstreamer {
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gst.Init(nil)
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mainLoop := glib.NewMainLoop(glib.MainContextDefault(), false)
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go mainLoop.Run()
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decklink := &Decklink{
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Slots: map[string]string{"one": ""},
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}
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gstreamer = &Gstreamer{
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ctx: context.Background(),
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Pipelines: map[string]*Pipeline{},
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pipelineSlots: make(map[string][]string),
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notifyOnUpdate: map[string][]NotifyOnPipelineUpdate{},
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Decklink: decklink,
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}
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return gstreamer
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}
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func (g *Gstreamer) AddPipeline(pipeline *Pipeline) {
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g.Lock()
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defer g.Unlock()
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if _, ok := g.pipelineSlots[pipeline.Name]; ok {
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g.pipelineSlots[pipeline.Name] = append(g.pipelineSlots[pipeline.Name], pipeline.ID)
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} else {
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g.pipelineSlots[pipeline.Name] = []string{pipeline.ID}
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}
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g.Pipelines[pipeline.ID] = pipeline
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pipeline.SubscribeToUpdates(g.notifySlotSubscriber())
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}
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func (g *Gstreamer) DeletePipeline(id string) error {
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g.Lock()
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defer g.Unlock()
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if pipeline, err := g.getPipeline(id); err == nil {
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var i int
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for i := range g.pipelineSlots[pipeline.Name] {
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if g.pipelineSlots[pipeline.Name][i] == pipeline.ID {
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break
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}
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}
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g.pipelineSlots[pipeline.Name] = append(g.pipelineSlots[pipeline.Name][:i], g.pipelineSlots[pipeline.Name][i+1:]...)
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delete(g.Pipelines, id)
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pipeline.ctxCancel()
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return nil
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}
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return errors.New("pipeline not found")
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}
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func (g *Gstreamer) GetPipeline(id string) (*Pipeline, error) {
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g.RLock()
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defer g.RUnlock()
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return g.getPipeline(id)
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}
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//only use this if ressource is locked
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func (g *Gstreamer) getPipeline(id string) (*Pipeline, error) {
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if pipeline, ok := g.Pipelines[id]; ok {
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return pipeline, nil
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}
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return nil, errors.New("Pipeline not found")
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}
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func (g *Gstreamer) SubscribeToSlotUpdates(slot string, callback NotifyOnPipelineUpdate) {
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g.Lock()
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defer g.Unlock()
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if _, ok := g.notifyOnUpdate[slot]; ok {
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g.notifyOnUpdate[slot] = append(g.notifyOnUpdate[slot], callback)
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} else {
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g.notifyOnUpdate[slot] = []NotifyOnPipelineUpdate{callback}
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}
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}
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func (g *Gstreamer) notifySlotSubscriber() NotifyOnPipelineUpdate {
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return func(pipeline *Pipeline) {
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for _, callback := range g.notifyOnUpdate[pipeline.Name] {
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callback(pipeline)
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}
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}
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}
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