Add soundbox.StreamURLContext()v0.1.0

This should be the primary public API of the library to stream web radio
to soundbox devices.

1 files changed, 40 insertions, 0 deletions

diff --git a/stream.go b/stream.go
index 38b3727..ac0a189 100644
--- a/stream.go
+++ b/stream.go
@@ -1,5 +1,45 @@
 package soundbox
 
+import (
+	"context"
+	"fmt"
+	"os/exec"
+	"net"
+)
+
 // streamingPort is the default network port a soundbox is listening to for
 // incoming audio stream data.
 const streamingPort = 5316
+
+func StreamURLContext(ctx context.Context, url string, targets []net.HardwareAddr) error {
+	iface, err := getInterface()
+	if err != nil {
+		return err
+	}
+
+	cmd := []string{
+		"-re",
+		"-i",
+		url,
+	}
+
+	for _, target := range targets {
+		ip, err := toLinkLocal(target)
+		if err != nil {
+			return err
+		}
+
+		cmd = append(cmd, "-acodec")
+		cmd = append(cmd, "flac")
+		cmd = append(cmd, "-f")
+		cmd = append(cmd, "ogg")
+		cmd = append(cmd, fmt.Sprintf(
+			"tcp://[%s%%%s]:%d",
+			ip,
+			iface.Name,
+			streamingPort,
+		))
+	}
+
+	return exec.CommandContext(ctx, "ffmpeg", cmd...).Run()
+}