Add /api/ffmpeg for playing files and tts on cameras with two-way audio

internal/ffmpeg/api.go

@@ -0,0 +1,51 @@
+package ffmpeg
+
+import (
+	"net/http"
+	"strings"
+
+	"github.com/AlexxIT/go2rtc/internal/streams"
+)
+
+func apiFFmpeg(w http.ResponseWriter, r *http.Request) {
+	if r.Method != "POST" {
+		http.Error(w, "", http.StatusMethodNotAllowed)
+		return
+	}
+
+	query := r.URL.Query()
+	dst := query.Get("dst")
+	stream := streams.Get(dst)
+	if stream == nil {
+		http.Error(w, "", http.StatusNotFound)
+		return
+	}
+
+	var src string
+	if s := query.Get("file"); s != "" {
+		if streams.Validate(s) == nil {
+			src = "ffmpeg:" + s + "#audio=auto#input=file"
+		}
+	} else if s = query.Get("live"); s != "" {
+		if streams.Validate(s) == nil {
+			src = "ffmpeg:" + s + "#audio=auto"
+		}
+	} else if s = query.Get("text"); s != "" {
+		if strings.IndexAny(s, `'"&%$`) < 0 {
+			src = "ffmpeg:tts?text=" + s
+			if s = query.Get("voice"); s != "" {
+				src += "&voice=" + s
+			}
+			src += "#audio=auto"
+		}
+	}
+
+	if src == "" {
+		http.Error(w, "", http.StatusBadRequest)
+		return
+	}
+
+	if err := stream.Play(src); err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+	}
+}

internal/ffmpeg/ffmpeg.go

@@ -5,6 +5,7 @@ import (
 	"slices"
 	"strings"
 
+	"github.com/AlexxIT/go2rtc/internal/api"
 	"github.com/AlexxIT/go2rtc/internal/app"
 	"github.com/AlexxIT/go2rtc/internal/ffmpeg/device"
 	"github.com/AlexxIT/go2rtc/internal/ffmpeg/hardware"
@@ -40,6 +41,8 @@ func Init() {
 
 	streams.HandleFunc("ffmpeg", NewProducer)
 
+	api.HandleFunc("api/ffmpeg", apiFFmpeg)
+
 	device.Init(defaults["bin"])
 	hardware.Init(defaults["bin"])
 }

www/links.html

@@ -85,16 +85,21 @@
 
 <div>
     <h2>Play audio</h2>
-    <pre>example: ffmpeg:https://example.com/song.mp3#audio=pcma#input=file</pre>
+    <label><input type="radio" name="play" value="file" checked>file - play remote (https://example.com/song.mp3) or local (/media/song.mp3) file</label><br>
-    <input id="play-url" type="text" placeholder="url">
+    <label><input type="radio" name="play" value="live">live - play remote live stream (radio, etc.)</label><br>
+    <label><input type="radio" name="play" value="text">text - play Text To Speech (if your FFmpeg support this)</label><br>
+    <br>
+    <input id="play-url" type="text" placeholder="path / url / text">
     <a id="play-send" href="#">send</a> / cameras with two way audio support
 </div>
 <script>
     document.getElementById('play-send').addEventListener('click', ev => {
         ev.preventDefault();
-        const url = new URL('api/streams', location.href);
+        // action - file / live / text
+        const action = document.querySelector('input[name="play"]:checked').value;
+        const url = new URL('api/ffmpeg', location.href);
         url.searchParams.set('dst', src);
-        url.searchParams.set('src', document.getElementById('play-url').value);
+        url.searchParams.set(action, document.getElementById('play-url').value);
         fetch(url, {method: 'POST'});
     });
 </script>