153 lines
3.4 KiB
Go
153 lines
3.4 KiB
Go
package playout
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import (
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"bytes"
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"fmt"
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"git.entr0py.de/garionion/ffmpeg-playout/status"
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"github.com/grafov/bcast"
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"log"
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"net/http"
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"net/url"
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"os"
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"os/exec"
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"path"
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"strconv"
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"syscall"
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"time"
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)
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type Job struct {
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ID int64
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Version string
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StartAt time.Time
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StopAt time.Time
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Source string
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Output string
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ControlChannel chan string
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}
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type Config struct {
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PlayoutScriptPath string
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PlayoutScript string
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ProgressDir string
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PrometheusPushGateway string
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OutputFormat string
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}
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func monitorFFmpeg(cfg *Config, progressPath string, f *bcast.Member, output string) {
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stats := make(chan status.Status)
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c := 0
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for {
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if c > 15 {
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return
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}
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if _, err := os.Stat(progressPath); os.IsNotExist(err) {
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time.Sleep(1 * time.Second)
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c++
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continue
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}
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err := status.FFmpegStatusWatcher(stats, progressPath)
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if err != nil {
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log.Println(err)
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continue
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} else {
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break
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}
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}
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u, _ := url.Parse(cfg.PrometheusPushGateway)
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u.Path = path.Join(u.Path, "metrics", "job", "Decklink_Outputs", output)
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c = 0
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for c < 4 {
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select {
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case <-f.Read:
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return
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case stat := <-stats:
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metric := fmt.Sprintf("frame %v\n dup_frames %v\n bitrate %v\n fps %v\n speed %v\n", stat.Frame, stat.Dupframes, stat.Bitrate, stat.FPS, stat.Speed)
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resp, err := http.Post(u.String(), "text/plain", bytes.NewBuffer([]byte(metric)))
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if err != nil {
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// log.Println(err)
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continue
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}
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resp.Body.Close()
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case <-time.After(4 * time.Second):
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c++
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break
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}
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}
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f.Send("finished")
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f.Close()
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}
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func killProcess(cmd *exec.Cmd, id int64) {
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log.Printf("Kill %v", cmd.Process.Pid)
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err := syscall.Kill(-cmd.Process.Pid, syscall.SIGKILL)
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if err != nil {
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log.Printf("Failed to kill %v: %v", cmd.Process.Pid, err)
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}
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log.Println(cmd.ProcessState.ExitCode())
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log.Printf("Finish %d", id)
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}
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//nolint:funlen
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func (p *Job) Playout(cfg *Config) {
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progressPath := path.Join(cfg.ProgressDir, strconv.FormatInt(p.ID, 10))
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playoutScript := path.Join(cfg.PlayoutScriptPath, cfg.PlayoutScript)
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for {
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log.Printf("Start Playout for %v", p.ID)
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log.Println(p.StartAt)
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log.Println(p.StopAt)
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log.Println(time.Until(p.StopAt))
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cmd := exec.Command(playoutScript, //nolint:gosec
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"-i", p.Source,
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"-o", p.Output,
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"-f", cfg.OutputFormat,
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"-p", progressPath,
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)
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cmd.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}
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cmd.Dir = cfg.PlayoutScriptPath
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var outbuf, errbuf bytes.Buffer
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cmd.Stdout = &outbuf
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cmd.Stderr = &errbuf
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err := cmd.Start()
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if err != nil {
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log.Printf("Failed to start Playout %v: %v", p.ID, err)
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}
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defer killProcess(cmd, p.ID)
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pid := cmd.Process.Pid
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log.Printf("PID for %v: %v", p.ID, pid)
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log.Println(cmd.Args)
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finishChannel := bcast.NewGroup()
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go finishChannel.Broadcast(0)
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go func(cmd *exec.Cmd, f *bcast.Member) {
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err := cmd.Wait()
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if err != nil {
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log.Println(err)
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}
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f.Send("finished")
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f.Close()
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}(cmd, finishChannel.Join())
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go monitorFFmpeg(cfg, progressPath, finishChannel.Join(), p.Output)
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fChannelMember := finishChannel.Join()
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ProcessManagement:
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for {
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select {
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case <-fChannelMember.Read:
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break ProcessManagement
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case ctrlMsg := <-p.ControlChannel:
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log.Printf("%d Control Message: %s", p.ID, ctrlMsg)
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break
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case <-time.After(time.Until(p.StopAt)):
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break ProcessManagement
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}
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}
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if time.Now().After(p.StopAt) {
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return
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}
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}
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}
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