func (l *List) PlayDescriptor(ld generator.VideoDescriptor) error {
params := ld.Params
listId := params["list_id"]
startString := params["start_at"]
start, _ := strconv.Atoi(startString)
list := datastore.List{Id: listId}
programIds, err := list.Get()
if err != nil {
return err
}
segmentsToHold := start
for i := 0; i < len(programIds); i++ {
if updatedIds, err := list.Get(); err == nil {
programIds = updatedIds
}
if hasIndex := (len(programIds) > i); !hasIndex {
return nil
}
program, err := datastore.GetProgram(programIds[i])
if err != nil {
continue
}
childPipeline := generator.RunProgram(program)
mediaChannel := childPipeline.MediaChannel()
childPipeline.Close()
for moreComing := true; moreComing; {
select {
case descriptor, more := <-mediaChannel:
if more {
if segmentsToHold > 0 {
segmentsToHold--
} else {
l.Output <- descriptor
}
} else {
moreComing = false
}
case <-l.CancelChan:
return errors.New("cancelled")
}
}
if updatedIds, err := list.Get(); err == nil {
programIds = updatedIds
}
}
return nil
}
func (p PreviewController) ServeHTTP(w http.ResponseWriter, r *http.Request) {
urlBase := strings.Split(r.URL.Path, ".")[0]
requestedProgram := urlBase
if r.Method == "POST" {
if newId := programPosted(w, r); newId == "" {
return
} else if requestedProgram == "new" || requestedProgram == "temp" {
requestedProgram = newId
fullUrl := fmt.Sprintf("/vod/%s.m3u8", requestedProgram)
w.Header().Add("Location", fullUrl)
w.Header().Add("X-Guide-Program", requestedProgram)
}
}
program, err := datastore.GetProgram(requestedProgram)
if err != nil {
http.Error(w, "Program not found", 404)
return
}
if urlBase != "temp" {
program.Persist()
}
if filepath.Ext(r.URL.Path) == ".json" {
w.Header().Add("Content-Type", "application/json")
encoder := json.NewEncoder(w)
if err := encoder.Encode(program); err != nil {
http.Error(w, "Error serializing program", 500)
return
}
} else {
w.Header().Add("Content-Type", "application/x-mpegurl")
playlist, _ := generator.Preview(program)
fmt.Fprintln(w, playlist.Encode().String())
}
}