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Diffstat (limited to 'mpris2client/mpris2.go')
-rw-r--r--mpris2client/mpris2.go355
1 files changed, 355 insertions, 0 deletions
diff --git a/mpris2client/mpris2.go b/mpris2client/mpris2.go
new file mode 100644
index 0000000..8565bd5
--- /dev/null
+++ b/mpris2client/mpris2.go
@@ -0,0 +1,355 @@
+package mpris2client
+
+import (
+ "fmt"
+ "io/ioutil"
+ "sort"
+ "strconv"
+ "strings"
+
+ "github.com/godbus/dbus/v5"
+)
+
+// Various paths and values to use elsewhere.
+const (
+ INTERFACE = "org.mpris.MediaPlayer2"
+ PATH = "/org/mpris/MediaPlayer2"
+ // For the NameOwnerChanged signal.
+ MATCH_NOC = "type='signal',path='/org/freedesktop/DBus',interface='org.freedesktop.DBus',member='NameOwnerChanged'"
+ // For the PropertiesChanged signal. It doesn't match exactly (couldn't get that to work) so we check it manually.
+ MATCH_PC = "type='signal',path='/org/mpris/MediaPlayer2',interface='org.freedesktop.DBus.Properties'"
+ Refresh = "refresh"
+)
+
+var knownPlayers = map[string]string{
+ "plasma-browser-integration": "Browser",
+ "noson": "Noson",
+}
+
+var knownBrowsers = map[string]string{
+ "mozilla": "Firefox",
+ "chrome": "Chrome",
+ "chromium": "Chromium",
+}
+
+// Player represents an active media player.
+type Player struct {
+ Player dbus.BusObject
+ FullName, Name, Title, Artist, AlbumArtist, Album string
+ Position int64
+ pid uint32
+ Playing, Stopped bool
+ metadata map[string]dbus.Variant
+ conn *dbus.Conn
+ poll int
+ interpolate bool
+}
+
+// NewPlayer returns a new player object.
+func NewPlayer(conn *dbus.Conn, name string, interpolate bool, poll int) (p *Player) {
+ playerName := strings.ReplaceAll(name, INTERFACE+".", "")
+ var pid uint32
+ conn.BusObject().Call("org.freedesktop.DBus.GetConnectionUnixProcessID", 0, name).Store(&pid)
+ for key, val := range knownPlayers {
+ if strings.Contains(name, key) {
+ playerName = val
+ break
+ }
+ }
+ if playerName == "Browser" {
+ file, err := ioutil.ReadFile(fmt.Sprintf("/proc/%d/cmdline", pid))
+ if err == nil {
+ cmd := string(file)
+ for key, val := range knownBrowsers {
+ if strings.Contains(cmd, key) {
+ playerName = val
+ break
+ }
+ }
+ }
+ }
+ p = &Player{
+ Player: conn.Object(name, PATH),
+ conn: conn,
+ Name: playerName,
+ FullName: name,
+ pid: pid,
+ interpolate: interpolate,
+ poll: poll,
+ }
+ p.Refresh()
+ return
+}
+
+func (p *Player) String() string {
+ return fmt.Sprintf("Name: %s; Playing: %t; PID: %d", p.FullName, p.Playing, p.pid)
+}
+
+// Refresh grabs playback info.
+func (p *Player) Refresh() (err error) {
+ val, err := p.Player.GetProperty(INTERFACE + ".Player.PlaybackStatus")
+ if err != nil {
+ p.Playing = false
+ p.Stopped = false
+ p.metadata = map[string]dbus.Variant{}
+ p.Title = ""
+ p.Artist = ""
+ p.AlbumArtist = ""
+ p.Album = ""
+ return
+ }
+ strVal := val.String()
+ if strings.Contains(strVal, "Playing") {
+ p.Playing = true
+ p.Stopped = false
+ } else if strings.Contains(strVal, "Paused") {
+ p.Playing = false
+ p.Stopped = false
+ } else {
+ p.Playing = false
+ p.Stopped = true
+ }
+ metadata, err := p.Player.GetProperty(INTERFACE + ".Player.Metadata")
+ if err != nil {
+ p.metadata = map[string]dbus.Variant{}
+ p.Title = ""
+ p.Artist = ""
+ p.AlbumArtist = ""
+ p.Album = ""
+ return
+ }
+ p.metadata = metadata.Value().(map[string]dbus.Variant)
+ switch artist := p.metadata["xesam:artist"].Value().(type) {
+ case []string:
+ p.Artist = strings.Join(artist, ", ")
+ case string:
+ p.Artist = artist
+ default:
+ p.Artist = ""
+ }
+ switch albumArtist := p.metadata["xesam:albumArtist"].Value().(type) {
+ case []string:
+ p.AlbumArtist = strings.Join(albumArtist, ", ")
+ case string:
+ p.AlbumArtist = albumArtist
+ default:
+ p.AlbumArtist = ""
+ }
+ switch title := p.metadata["xesam:title"].Value().(type) {
+ case string:
+ p.Title = title
+ default:
+ p.Title = ""
+ }
+ switch album := p.metadata["xesam:album"].Value().(type) {
+ case string:
+ p.Album = album
+ default:
+ p.Album = ""
+ }
+ return nil
+}
+
+func µsToString(µs int64) string {
+ seconds := int(µs / 1e6)
+ minutes := int(seconds / 60)
+ seconds -= minutes * 60
+ return fmt.Sprintf("%02d:%02d", minutes, seconds)
+}
+
+// StringPosition figures out the track position in MM:SS/MM:SS, interpolating the value if necessary.
+func (p *Player) StringPosition() string {
+ // position is in microseconds so we prob need int64 to be safe
+ v := p.metadata["mpris:length"].Value()
+ var l int64
+ if v != nil {
+ l = v.(int64)
+ } else {
+ return ""
+ }
+ length := µsToString(l)
+ if length == "" {
+ return ""
+ }
+ pos, err := p.Player.GetProperty(INTERFACE + ".Player.Position")
+ if err != nil {
+ return ""
+ }
+ position := µsToString(pos.Value().(int64))
+ if position == "" {
+ return ""
+ }
+ if p.interpolate && position == µsToString(p.Position) {
+ np := p.Position + int64(p.poll*1e6)
+ position = µsToString(np)
+ }
+ p.Position = pos.Value().(int64)
+ return position + "/" + length
+}
+
+// Next requests the next track.
+func (p *Player) Next() { p.Player.Call(INTERFACE+".Player.Next", 0) }
+
+// Previous requests the previous track.
+func (p *Player) Previous() { p.Player.Call(INTERFACE+".Player.Previous", 0) }
+
+// Toggle requests play/pause
+func (p *Player) Toggle() { p.Player.Call(INTERFACE+".Player.PlayPause", 0) }
+
+type Message struct {
+ Name, Value string
+}
+
+type PlayerArray []*Player
+
+func (ls PlayerArray) Len() int {
+ return len(ls)
+}
+
+func (ls PlayerArray) Less(i, j int) bool {
+ var states [2]uint8
+ for i, p := range []bool{ls[i].Playing, ls[j].Playing} {
+ if p {
+ states[i] = 1
+ }
+ }
+ // Reverse order
+ return states[0] > states[1]
+}
+
+func (ls PlayerArray) Swap(i, j int) {
+ ls[i], ls[j] = ls[j], ls[i]
+}
+
+type Mpris2 struct {
+ List PlayerArray
+ Current uint
+ conn *dbus.Conn
+ Messages chan Message
+ interpolate bool
+ poll int
+ autofocus bool
+}
+
+func NewMpris2(conn *dbus.Conn, interpolate bool, poll int, autofocus bool) *Mpris2 {
+ return &Mpris2{
+ List: PlayerArray{},
+ Current: 0,
+ conn: conn,
+ Messages: make(chan Message),
+ interpolate: interpolate,
+ poll: poll,
+ }
+}
+
+// Listen should be run as a Goroutine. When players become available or are removed, an mpris2.Message is sent on mpris2.Mpris2.Messages with Name "add"/"remove" and Value as the player name. When a players state changes, a message is sent on mpris2.Mpris2.Messages with Name "refresh".
+func (pl *Mpris2) Listen() {
+ c := make(chan *dbus.Signal, 10)
+ pl.conn.BusObject().Call("org.freedesktop.DBus.AddMatch", 0, MATCH_NOC)
+ pl.conn.BusObject().Call("org.freedesktop.DBus.AddMatch", 0, MATCH_PC)
+ pl.conn.Signal(c)
+ for v := range c {
+ if strings.Contains(v.Name, "NameOwnerChanged") {
+ switch name := v.Body[0].(type) {
+ case string:
+ var pid uint32
+ pl.conn.BusObject().Call("org.freedesktop.DBus.GetConnectionUnixProcessID", 0, name).Store(&pid)
+ // Ignore playerctld again
+ if strings.Contains(name, INTERFACE) && !strings.Contains(name, "playerctld") {
+ if pid == 0 {
+ pl.Remove(name)
+ pl.Messages <- Message{Name: "remove", Value: name}
+ } else {
+ pl.New(name)
+ pl.Messages <- Message{Name: "add", Value: name}
+ }
+ }
+ }
+ } else if strings.Contains(v.Name, "PropertiesChanged") && strings.Contains(v.Body[0].(string), INTERFACE+".Player") {
+ pl.Refresh()
+ }
+ }
+}
+
+func (pl *Mpris2) Remove(fullName string) {
+ currentName := pl.List[pl.Current].FullName
+ var i int
+ found := false
+ for ind, p := range pl.List {
+ if p.FullName == fullName {
+ i = ind
+ found = true
+ break
+ }
+ }
+ if !found {
+ return
+ }
+ pl.List[0], pl.List[i] = pl.List[i], pl.List[0]
+ pl.List = pl.List[1:]
+ found = false
+ for ind, p := range pl.List {
+ if p.FullName == currentName {
+ pl.Current = uint(ind)
+ found = true
+ break
+ }
+ }
+ if !found {
+ pl.Current = 0
+ pl.Refresh()
+ //fmt.Fprintln(WRITER, pl.JSON())
+ }
+}
+
+func (pl *Mpris2) Reload() error {
+ var buses []string
+ err := pl.conn.BusObject().Call("org.freedesktop.DBus.ListNames", 0).Store(&buses)
+ if err != nil {
+ return err
+ }
+ for _, name := range buses {
+ // Don't add playerctld, it just duplicates other players
+ if strings.HasPrefix(name, INTERFACE) && !strings.Contains(name, "playerctld") {
+ pl.New(name)
+ }
+ }
+ return nil
+}
+
+func (pl *Mpris2) String() string {
+ resp := ""
+ pad := 0
+ i := len(pl.List)
+ for i != 0 {
+ i /= 10
+ pad++
+ }
+ for i, p := range pl.List {
+ symbol := ""
+ if uint(i) == pl.Current {
+ symbol = "*"
+ }
+ resp += fmt.Sprintf("%0"+strconv.Itoa(pad)+"d", i) + symbol + ": " + p.String() + "\n"
+ }
+ return resp
+}
+
+func (pl *Mpris2) New(name string) {
+ pl.List = append(pl.List, NewPlayer(pl.conn, name, pl.interpolate, pl.poll))
+ if pl.autofocus {
+ pl.Current = uint(len(pl.List) - 1)
+ }
+}
+
+func (pl *Mpris2) Sort() {
+ sort.Sort(pl.List)
+ pl.Current = 0
+}
+
+func (pl *Mpris2) Refresh() {
+ for i := range pl.List {
+ pl.List[i].Refresh()
+ }
+ pl.Messages <- Message{Name: "refresh", Value: ""}
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-09 20:27:43 +0000