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|
package main
import (
"io"
"os/exec"
"sync"
"syscall"
"muhq.space/go/wrms/llog"
)
type Player struct {
Backends map[string]Backend
mpv *exec.Cmd
wrms *Wrms
}
func NewPlayer(wrms *Wrms, backends []string) Player {
availableBackends := map[string]Backend{}
var b Backend
var err error
for _, backend := range backends {
switch backend {
case "spotify":
b, err = NewSpotify(wrms.Config.Spotify)
case "youtube":
b = NewYoutubeBackend()
case "dummy":
b = &DummyBackend{}
case "local":
b = NewLocalBackend(wrms.Config.LocalMusicDir)
case "upload":
b = NewUploadBackend(wrms.Config.UploadDir)
default:
llog.Error("Not supported backend %s", backend)
}
if err != nil {
llog.Error("Error during initialization of the %s backend: %s", backend, err.Error())
} else {
availableBackends[backend] = b
}
}
return Player{availableBackends, nil, wrms}
}
func (player *Player) Play(song *Song) {
if player.mpv != nil {
llog.Debug("Send SIGCONT to mpv subprocess")
err := player.mpv.Process.Signal(syscall.SIGCONT)
if err != nil {
llog.Fatal("Failed to send SIGCONT to mpv")
}
return
}
llog.Info("Start playing %v", song)
player.Backends[song.Source].Play(song, player)
}
func (player *Player) runMpv() {
_, err := player.mpv.CombinedOutput()
if err != nil {
llog.Fatal(err.Error())
}
wrms := player.wrms
llog.Info("mpv finished. Resetting mpv, the current song and call play")
player.mpv = nil
wrms.Playing = false
player.Backends[wrms.CurrentSong.Source].OnSongFinished(&wrms.CurrentSong)
wrms.CurrentSong.Uri = ""
wrms.PlayPause()
}
func (player *Player) PlayUri(uri string) {
llog.Info("Start mpv with %s", uri)
player.mpv = exec.Command("mpv", "--no-video", uri)
go player.runMpv()
}
func (player *Player) PlayData(data io.Reader) {
if player.mpv != nil {
llog.Fatal("Player has already an mpv subprocess")
}
player.mpv = exec.Command("mpv", "-")
stdin, err := player.mpv.StdinPipe()
if err != nil {
llog.Fatal(err.Error())
}
go func() {
defer stdin.Close()
if _, err := io.Copy(stdin, data); err != nil {
llog.Fatal("Failed to write song data to mpv (%v)", err)
}
}()
go player.runMpv()
}
func (player *Player) Pause() {
if player.mpv != nil {
llog.Debug("Send SIGSTOP to mpv subprocess")
err := player.mpv.Process.Signal(syscall.SIGSTOP)
if err != nil {
llog.Fatal("Failed to send SIGSTOP to mpv")
}
}
}
func (player *Player) Search(pattern string) chan []Song {
var wg sync.WaitGroup
wg.Add(len(player.Backends))
ch := make(chan []Song)
for _, backend := range player.Backends {
backend := backend
go func() {
ch <- backend.Search(pattern)
wg.Done()
}()
}
go func() {
wg.Wait()
close(ch)
}()
return ch
}
|
