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softlab / pttdroid

Automatically exported from code.google.com/p/pttdroid
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how to make two way voice send and recive ?? #3

Open GoogleCodeExporter opened 9 years ago

GoogleCodeExporter commented 9 years ago 

why u havent make it two way send recive to full duplex voice transfer ??? 

If there is any possibility then kindly discuss with me ... Thanks in advance.

Original issue reported on code.google.com by mahsanq...@gmail.com on 22 Nov 2012 at 12:20

GoogleCodeExporter commented 9 years ago 
It doesn't work in full duplex because echo cancellation is turned off (Speex 
default settings I guess).

Original comment by ionut.ur...@gmail.com on 26 Nov 2012 at 7:38

GoogleCodeExporter commented 9 years ago 
[deleted comment]
GoogleCodeExporter commented 9 years ago 
Thank you very much for this great app

its a little offtopic but its possible to listen the pttdroid multicast or 
broadcast from alinux machine ? I get error for unknown format,I use the not 
speex format 
wich its 8000hz 16bits signd PCM so 

I tried..

I get some sound but not inteligible

MULTICAST_IP_ADDR=230.0.0.1
AUDIO_UDP_PORT=2010

gst-launch-0.10 udpsrc multicast-group=$MULTICAST_IP_ADDR auto-multicast=true 
port=$AUDIO_UDP_PORT \
caps="application/x-rtp, media=(string)audio, clock-rate=(int)8000, 
encoding-name=(string)PCMU, \
payload=(int)0, ssrc=(guint)1350777638, clock-base=(guint)2942119800, 
seqnum-base=(guint)47141" ! \
rtppcmudepay ! mulawdec ! pulsesink

I also tried :

mplayer udp://@230.0.0.1:2010 
cvlc -vvv udp://@230.0.0.1:2010 

I also tried the opposite, like sending audio to the app from gstreamer again I 
hear some distorted sound on android but not inteligible

Thanks for your help and any hint or insight you could give me

Original comment by jordipar...@gmail.com on 18 Dec 2013 at 9:23

GoogleCodeExporter commented 9 years ago 
Hi,

Try both big/little endian format

Original comment by ionut.ur...@gmail.com on 18 Dec 2013 at 11:27

GoogleCodeExporter commented 9 years ago 
Hi,

Thank you very much for answering so fast,

By Try both big/little endian format you mean change the 
encoding-name=(string)PCMU ?
I havent found a list of implemented encodings the gstreamer can do many things 
but can be complicated to grasp...

BTW I found a workaround not optimal cause it uses python but at least works,

I get "ALSA lib pcm.c:7843:(snd_pcm_recover) underrun occurred "but sounds fine

In python 
"import socket
import pyaudio, sys
import struct

#import time, wave, pymedia.audio.sound as sound

##http://stackoverflow.com/questions/603852/multicast-in-python
##http://pymotw.com/2/socket/multicast.html

MCAST_GRP = '231.0.0.1'
MCAST_PORT = 2010

sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP)
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
sock.bind(('', MCAST_PORT))

mreq = struct.pack("4sl", socket.inet_aton(MCAST_GRP), socket.INADDR_ANY)

sock.setsockopt(socket.IPPROTO_IP, socket.IP_ADD_MEMBERSHIP, mreq)

BUFF= 1024*4
#chunk = 320
chunk = 160
FORMAT = pyaudio.paInt16
#   http://people.csail.mit.edu/hubert/pyaudio/docs/
#    paFloat32, paInt32, paInt24, paInt16, paInt8, paUInt8, paCustomFormat

CHANNELS = 1
RATE = 8000

p = pyaudio.PyAudio()
stream = p.open(format = FORMAT, channels = CHANNELS, rate = RATE, input = 
True,output = True, frames_per_buffer = chunk)

while True:

   data = sock.recv(BUFF)
   stream.write(data,chunk)"

Original comment by jordipar...@gmail.com on 18 Dec 2013 at 4:02