Move to new Track API

See v2.0.0 Release Notes[0] for all changes

Resolves #405

[0] https://github.com/pions/webrtc/wiki/v2.0.0-Release-Notes#media-api

examples/internal/gstreamer-src/gst.go

@@ -23,7 +23,7 @@ func init() {
 // Pipeline is a wrapper for a GStreamer Pipeline
 type Pipeline struct {
 	Pipeline *C.GstElement
-	in       chan<- media.Sample
+	track    *webrtc.Track
 	// stop acts as a signal that this pipeline is stopped
 	// any pending sends to Pipeline.in should be cancelled
 	stop      chan interface{}
@@ -35,7 +35,7 @@ var pipelines = make(map[int]*Pipeline)
 var pipelinesLock sync.Mutex
 
 // CreatePipeline creates a GStreamer Pipeline
-func CreatePipeline(codecName string, in chan<- media.Sample, pipelineSrc string) *Pipeline {
+func CreatePipeline(codecName string, track *webrtc.Track, pipelineSrc string) *Pipeline {
 	pipelineStr := "appsink name=appsink"
 	switch codecName {
 	case webrtc.VP8:
@@ -60,7 +60,7 @@ func CreatePipeline(codecName string, in chan<- media.Sample, pipelineSrc string
 
 	pipeline := &Pipeline{
 		Pipeline:  C.gstreamer_send_create_pipeline(pipelineStrUnsafe),
-		in:        in,
+		track:     track,
 		id:        len(pipelines),
 		codecName: codecName,
 	}
@@ -105,9 +105,8 @@ func goHandlePipelineBuffer(buffer unsafe.Pointer, bufferLen C.int, duration C.i
 		}
 		// We need to be able to cancel this function even f pipeline.in isn't being serviced
 		// When pipeline.stop is closed the sending of data will be cancelled.
-		select {
-		case pipeline.in <- media.Sample{Data: C.GoBytes(buffer, bufferLen), Samples: samples}:
-		case <-pipeline.stop:
+		if err := pipeline.track.WriteSample(media.Sample{Data: C.GoBytes(buffer, bufferLen), Samples: samples}); err != nil {
+			panic(err)
 		}
 	} else {
 		fmt.Printf("discarding buffer, no pipeline with id %d", int(pipelineID))