add transmit function

mumble-bot/bot.py

@@ -1,8 +1,11 @@
 import argparse
 import audioop
 import logging
+import math
 import sys
+import struct
 import time
+import threading
 from functools import partial
 
 import pymumble_py3 as pymumble
@@ -11,6 +14,32 @@ from pymumble_py3.constants import PYMUMBLE_CLBK_TEXTMESSAGERECEIVED
 is_streaming = False
 silence_time = 0
 
+SHORT_NORMALIZE = (1.0/32768.0)
+
+## peak detection
+
+def get_rms( block ):
+    # RMS amplitude is defined as the square root of the 
+    # mean over time of the square of the amplitude.
+    # so we need to convert this string of bytes into 
+    # a string of 16-bit samples...
+
+    # we will get one short out for each 
+    # two chars in the string.
+    count = len(block)/2
+    format = "%dh"%(count)
+    shorts = struct.unpack( format, block )
+
+    # iterate over the block.
+    sum_squares = 0.0
+    for sample in shorts:
+        # sample is a signed short in +/- 32768. 
+        # normalize it to 1.0
+        n = sample * SHORT_NORMALIZE
+        sum_squares += n*n
+
+    return math.sqrt( sum_squares / count )
+
 
 def message_received(mumble, message):
     global is_streaming
@@ -42,6 +71,11 @@ def get_parser():
         help="Ignore commands in chat and stream everything",
     )
     parser.add_argument(
+        "--transmit",
+        action="store_true",
+        help="Transmit from your stdin",
+    )
+    parser.add_argument(
         "--auto-suspend-stream",
         action="store_true",
         help="Ignore commands in chat and stream everything",
@@ -63,6 +97,22 @@ def get_parser():
     return parser
 
 
+def transmit(name, mumble, chunk_size):
+    buffer = 0
+    while True:
+        try:
+            data = sys.stdin.buffer.read(int(chunk_size))
+            if(get_rms(data) > 0.09):
+                mumble.sound_output.add_sound(data)
+                buffer = 10005B
+            else:
+                # keep the audio open for one second
+                if(buffer >= 0):
+                    mumble.sound_output.add_sound(data)
+                    buffer -= 10
+        except IOError as e:
+            print( " Error recording: %s"%e )
+
 def main():
     global is_streaming
     global silence_time
@@ -89,7 +139,8 @@ def main():
     mumble.start()
     mumble.is_ready()  # Wait for client is ready
     mumble.channels.find_by_tree(channel.split('/')).move_in()
-    mumble.users.myself.mute()
+    if not args.transmit:
+        mumble.users.myself.mute()
 
     if is_streaming:
         mumble.users.myself.recording()
@@ -103,6 +154,10 @@ def main():
     silent = b"\x00" * int(STEREO_CHUNK_SIZE)
     cursor_time = time.time() - BUFFER
 
+    if args.transmit:
+        transmit_thread = threading.Thread(target=sound_recorder, args=(1,mumble, MONO_CHUNK_SIZE))
+        transmit_thread.start()
+    
     while mumble.is_alive():
         if cursor_time < time.time() - BUFFER:
             base_sound = None