feat: added runtime option for pulse backend

README.md

@@ -203,6 +203,7 @@ device_id: '' # Spotify device ID (auto-generated)
 device_name: '' # Spotify device name
 device_type: computer # Spotify device type (icon)
 audio_backend: alsa # Audio backend to use (alsa, pipe, pulseaudio)
+audio_backend_runtime_socket: '' # Audio backends' runtime socket to use, if backend is pulseaudio
 audio_device: default # ALSA audio device to use for playback
 mixer_device: '' # ALSA mixer device for volume synchronization 
 mixer_control_name: Master # ALSA mixer control name for volume synchronization
@@ -232,4 +233,4 @@ or using Go:
 
 ```shell
 go generate ./...
-```
+```

cmd/daemon/main.go

@@ -161,10 +161,11 @@ func (app *App) newAppPlayer(ctx context.Context, creds any) (_ *AppPlayer, err
 
 		CountryCode: appPlayer.countryCode,
 
-		AudioBackend:     app.cfg.AudioBackend,
-		AudioDevice:      app.cfg.AudioDevice,
-		MixerDevice:      app.cfg.MixerDevice,
-		MixerControlName: app.cfg.MixerControlName,
+		AudioBackend:              app.cfg.AudioBackend,
+		AudioBackendRuntimeSocket: app.cfg.AudioBackendRuntimeSocket,
+		AudioDevice:               app.cfg.AudioDevice,
+		MixerDevice:               app.cfg.MixerDevice,
+		MixerControlName:          app.cfg.MixerControlName,
 
 		AudioBufferTime:  app.cfg.AudioBufferTime,
 		AudioPeriodCount: app.cfg.AudioPeriodCount,
@@ -393,6 +394,7 @@ type Config struct {
 	DeviceType                    string    `koanf:"device_type"`
 	ClientToken                   string    `koanf:"client_token"`
 	AudioBackend                  string    `koanf:"audio_backend"`
+	AudioBackendRuntimeSocket     string    `koanf:"audio_backend_runtime_socket"`
 	AudioDevice                   string    `koanf:"audio_device"`
 	MixerDevice                   string    `koanf:"mixer_device"`
 	MixerControlName              string    `koanf:"mixer_control_name"`

config_schema.json

@@ -75,6 +75,11 @@
           ],
           "default": "alsa"
         },
+        "audio_backend_runtime_socket": {
+           "type": "string",
+           "description": "The audio backend runtime socket, useful only with pulseaudio as a backend",
+           "default": ""
+        },
         "audio_device": {
           "type": "string",
           "description": "Which audio device should be used for playback, leave empty for default",

output/driver-pulseaudio.go

@@ -28,7 +28,13 @@ func newPulseAudioOutput(opts *NewOutputOptions) (*pulseAudioOutput, error) {
 	// The device name is shown by PulseAudio volume controls (usually built
 	// into a desktop environment), so we might want to use device_name here.
 	// We could also maybe change the application icon name by device_type.
-	client, err := pulse.NewClient(pulse.ClientApplicationName("go-librespot"), pulse.ClientApplicationIconName("speaker"))
+	clientopts := []pulse.ClientOption{pulse.ClientApplicationName("go-librespot"), pulse.ClientApplicationIconName("speaker")}
+
+	if opts.RuntimeSocket != "" {
+		clientopts = append(clientopts, pulse.ClientServerString(opts.RuntimeSocket))
+	}
+
+	client, err := pulse.NewClient(clientopts...)
 	if err != nil {
 		return nil, err
 	}
@@ -43,11 +49,12 @@ func newPulseAudioOutput(opts *NewOutputOptions) (*pulseAudioOutput, error) {
 
 	// Create a new playback.
 	var channelOpt pulse.PlaybackOption
-	if opts.ChannelCount == 1 {
+	switch opts.ChannelCount {
+	case 1:
 		channelOpt = pulse.PlaybackMono
-	} else if opts.ChannelCount == 2 {
+	case 2:
 		channelOpt = pulse.PlaybackStereo
-	} else {
+	default:
 		return nil, fmt.Errorf("cannot play %d channels, pulse only supports mono and stereo", opts.ChannelCount)
 	}
 	volumeUpdates := make(chan proto.ChannelVolumes, 1)

output/output.go

@@ -57,8 +57,13 @@ type NewOutputOptions struct {
 
 	// Device specifies the audio device name.
 	//
-	// This feature is support only for the alsa backend.
+	// This feature is support only for the alsa and pulseaudio backend.
 	Device string
+	// RuntimeSocket specifies a prefixed with protocol (e.g. `unix:` or `tcp:`) path
+	// to a runtime socket of audio backend.
+	//
+	// This feature is support only for pulseaudio backend.
+	RuntimeSocket string
 
 	// Mixer specifies the audio mixer name.
 	//

player/player.go

@@ -114,9 +114,14 @@ type Options struct {
 
 	// AudioBackend specifies the audio backend to use (alsa, pulseaudio, etc).
 	AudioBackend string
+	// AudioBackendRuntimeSocket specifies a prefixed with protocol (e.g. `unix:` or `tcp:`) path
+	// to a runtime socket of audio backend.
+	//
+	// This feature is support only for the pulseaudio backend.
+	AudioBackendRuntimeSocket string
 	// AudioDevice specifies the audio device name.
 	//
-	// This feature is support only for the alsa backend.
+	// This feature is support only for the alsa and pulseaudio backend.
 	AudioDevice string
 	// MixerDevice specifies the audio mixer name.
 	//
@@ -126,7 +131,6 @@ type Options struct {
 	//
 	// This only works in combination with Mixer.
 	MixerControlName string
-
 	// AudioBufferTime is the buffer time in microseconds.
 	//
 	// This is only supported on the alsa backend.
@@ -178,6 +182,7 @@ func NewPlayer(opts *Options) (*Player, error) {
 				SampleRate:       SampleRate,
 				ChannelCount:     Channels,
 				Device:           opts.AudioDevice,
+				RuntimeSocket:    opts.AudioBackendRuntimeSocket,
 				Mixer:            opts.MixerDevice,
 				Control:          opts.MixerControlName,
 				InitialVolume:    volume,