add basic usb input mode functionallity

src/auracast/server/multicast_frontend.py

@@ -3,6 +3,7 @@ from itertools import filterfalse
 import streamlit as st
 import requests
 from auracast import auracast_config
+import logging as log
 
 # Global: desired packetization time in ms for Opus (should match backend)
 PTIME = 40
@@ -43,15 +44,44 @@ if audio_mode in ["Webapp", "USB"]:
     quality = "High (48kHz)"
     default_name = saved_settings.get('channel_names', ["Broadcast0"])[0]
     default_lang = saved_settings.get('languages', ["deu"])[0]
+    default_input = saved_settings.get('input_device') or 'default'
     stream_name = st.text_input("Channel Name", value=default_name)
     language = st.text_input("Language (ISO 639-3)", value=default_lang)
+
+    # Input device selection for USB mode
+    if audio_mode == "USB":
+        try:
+            import sounddevice as sd  # type: ignore
+            devs = sd.query_devices()
+            log.info('Found audio devices: %s', devs)
+            input_options = [
+                f"{idx}:{d['name']}"
+                for idx, d in enumerate(devs)
+                if d.get('max_input_channels', 0) > 0 and ("(hw:" in d['name'].lower() or "usb" in d['name'].lower())
+            ]
+        except Exception:
+            input_options = []
+
+        if not input_options:
+            st.error("No hardware audio input devices found.")
+            st.stop()
+
+        if default_input not in input_options:
+            default_input = input_options[0]
+
+        selected_option = st.selectbox("Input Device", input_options, index=input_options.index(default_input))
+        # We send only the numeric/card identifier (before :) or 'default'
+        input_device = selected_option.split(":", 1)[0] if ":" in selected_option else selected_option
+    else:
+        input_device = None
     start_stream = st.button("Start Auracast")
 
     if start_stream:
         # Prepare config using the model (do NOT send qos_config, only relevant fields)
         q = quality_map[quality]
-        
         config = auracast_config.AuracastConfigGroup(
+            auracast_sampling_rate_hz=q['rate'],
+            octets_per_frame=q['octets'],
             transport="auto",
             bigs = [
                 auracast_config.AuracastBigConfig(
@@ -59,11 +89,11 @@ if audio_mode in ["Webapp", "USB"]:
                     program_info=f"{stream_name} {quality}",
                     language=language,
                     audio_source=(
-                        "webrtc" if audio_mode == "Webapp" else (
-                            "usb" if audio_mode == "USB" else "network"
+                        f"device:{input_device}" if audio_mode == "USB" else (
+                            "webrtc" if audio_mode == "Webapp" else "network"
                         )
                     ),
-                    input_format="auto",
+                    input_format=(f"int16le,{q['rate']},1" if audio_mode == "USB" else "auto"),
                     iso_que_len=1, # TODO: this should be way less to decrease delay
                     sampling_frequency=q['rate'],
                     octets_per_frame=q['octets'],
@@ -73,7 +103,7 @@ if audio_mode in ["Webapp", "USB"]:
         try:
             r = requests.post(f"{BACKEND_URL}/init", json=config.model_dump())
             if r.status_code == 200:
-                st.success("Stream initialized!")
+                st.success("Stream Started!")
             else:
                 st.error(f"Failed to initialize: {r.text}")
         except Exception as e:
@@ -127,3 +157,7 @@ else:
     # else:
     #     st.error("Could not fetch advertised streams.")
 
+log.basicConfig(
+    level=log.DEBUG,
+    format='%(module)s.py:%(lineno)d %(levelname)s: %(message)s'
+)