Initial commit

vendor/github.com/mafik/pulseaudio/outputs.go

@@ -0,0 +1,153 @@
+package pulseaudio
+
+import "fmt"
+
+// Output represents PulseAudio output.
+type Output struct {
+	client    *Client
+	CardID    string
+	PortID    string
+	CardName  string
+	PortName  string
+	Available bool
+}
+
+// Activate sets this output as the main one.
+func (o Output) Activate() error {
+	c := o.client
+	cards, err := c.Cards()
+	if err != nil {
+		return err
+	}
+
+	if o.CardID == "all" && o.PortID == "none" {
+		for _, otherCard := range cards {
+			err = c.SetCardProfile(otherCard.Index, "off")
+			if err != nil {
+				return err
+			}
+		}
+		return nil
+	}
+
+	var found bool
+	var card Card
+	for _, card = range cards {
+		if card.Name == o.CardID {
+			found = true
+			break
+		}
+	}
+	if !found {
+		return fmt.Errorf("PulseAudio error: card %s is no longer available", o.CardID)
+	}
+
+	found = false
+	var port port
+	for _, port = range card.Ports {
+		if port.Name == o.PortID {
+			found = true
+			break
+		}
+	}
+	if !found {
+		return fmt.Errorf("PulseAudio error: port %s is no longer available", o.PortID)
+	}
+
+	for _, otherCard := range cards {
+		if otherCard.Index == card.Index {
+			continue
+		}
+		err = c.SetCardProfile(otherCard.Index, "off")
+		if err != nil {
+			return err
+		}
+	}
+	bestProfile := port.Profiles[0]
+	for _, profile := range port.Profiles {
+		if profile.Priority > bestProfile.Priority {
+			bestProfile = profile
+		}
+	}
+	err = c.SetCardProfile(card.Index, bestProfile.Name)
+	if err != nil {
+		return err
+	}
+	sinks, err := c.sinks()
+	if err != nil {
+		return err
+	}
+	s, err := c.ServerInfo()
+	if err != nil {
+		return err
+	}
+	for _, sink := range sinks {
+		if sink.CardIndex != card.Index {
+			continue
+		}
+		if s.DefaultSink == sink.Name {
+			continue
+		}
+		return c.setDefaultSink(sink.Name)
+	}
+	return nil
+}
+
+// Outputs returns a list of all audio outputs and an index of the active audio output.
+//
+// The last audio output is always called "None" and indicates that audio is disabled.
+func (c *Client) Outputs() (outputs []Output, activeIndex int, err error) {
+	s, err := c.ServerInfo()
+	if err != nil {
+		return nil, 0, err
+	}
+	sinks, err := c.sinks()
+	if err != nil {
+		return nil, 0, err
+	}
+	cards, err := c.Cards()
+	if err != nil {
+		return nil, 0, err
+	}
+
+	activeIndex = -1
+	for _, card := range cards {
+		for _, port := range card.Ports {
+			if port.Direction != 1 {
+				continue
+			}
+			for _, sink := range sinks {
+				if sink.Name != s.DefaultSink {
+					continue
+				}
+				if sink.CardIndex != card.Index {
+					continue
+				}
+				if sink.ActivePortName != port.Name {
+					continue
+				}
+				activeIndex = len(outputs)
+			}
+			outputs = append(outputs, Output{
+				client:    c,
+				CardID:    card.Name,
+				CardName:  card.PropList["device.description"],
+				PortID:    port.Name,
+				PortName:  port.Description,
+				Available: port.Available != 1,
+			})
+		}
+	}
+	if activeIndex == -1 {
+		activeIndex = len(outputs)
+	}
+	outputs = append(outputs, Output{
+		client:    c,
+		CardID:    "all",
+		CardName:  "All",
+		PortID:    "none",
+		PortName:  "None",
+		Available: false,
+	})
+	return
+}