def do_RTP(self, session, event):
'''
Method called when an rtp data packet arrives.
'''
packet = common.make_rtp_packet(event.data)
data = common.rtp_packet_getdata(packet)
# require H261 as input
if packet.pt != 31:
common.free_rtp_packet(packet)
return
# only forward selected source
if self.selector:
if not packet.ssrc == self.allowedSource:
common.free_rtp_packet(packet)
return
pt = 31
destination = None
try:
# Create a new source for each stream to send
# to the multicast address. Each new source is
# keeping track of its own timestamp.
if self.sources.has_key(packet.ssrc):
destination = self.sources[packet.ssrc]
else:
destination = common.Rtp(self.to_address, self.to_port,
self.to_port, 127,
64000.0, None)
dest_ssrc = destination.my_ssrc()
tool = "audiotest.py"
name = "RTP Messer"
destination.set_sdes(dest_ssrc, common.RTCP_SDES_TOOL,
tool, len(tool))
destination.set_sdes(dest_ssrc, common.RTCP_SDES_NAME,
name, len(name))
#destination.send_ctrl(0, None)
self.sources[packet.ssrc] = destination
# Send data
ts = 0
destination.send_data(ts, packet.pt, packet.m,
packet.cc, packet.csrc,
data, len(data),
packet.extn, packet.extn_len,
packet.extn_type)
# Increment timestamp
except Exception, e:
print "Exception sending data, ", e
def do_RTP(self, session, event):
'''
Method called when an rtp data packet arrives.
'''
packet = common.make_rtp_packet(event.data)
data = common.rtp_packet_getdata(packet)
# require H261 as input
if packet.pt != 31:
common.free_rtp_packet(packet)
return
# only forward selected source
if self.selector:
if not packet.ssrc == self.allowedSource:
common.free_rtp_packet(packet)
return
pt = 31
destination = None
try:
# Create a new source for each stream to send
# to the multicast address. Each new source is
# keeping track of its own timestamp.
if self.sources.has_key(packet.ssrc):
destination = self.sources[packet.ssrc]
else:
destination = common.Rtp(self.to_address, self.to_port,
self.to_port, 127, 64000.0, None)
dest_ssrc = destination.my_ssrc()
tool = "audiotest.py"
name = "RTP Messer"
destination.set_sdes(dest_ssrc, common.RTCP_SDES_TOOL, tool,
len(tool))
destination.set_sdes(dest_ssrc, common.RTCP_SDES_NAME, name,
len(name))
#destination.send_ctrl(0, None)
self.sources[packet.ssrc] = destination
# Send data
ts = 0
destination.send_data(ts, packet.pt,
packet.m, packet.cc, packet.csrc, data,
len(data), packet.extn, packet.extn_len,
packet.extn_type)
# Increment timestamp
except Exception, e:
print "Exception sending data, ", e
def do_RTP(self, session, event):
'''
Method called when an rtp data packet arrives.
'''
packet = common.make_rtp_packet(event.data)
data = common.rtp_packet_getdata(packet)
# require l16-16k mono as input
if packet.pt != 112:
common.free_rtp_packet(packet)
return
# only forward selected source
if self.selector:
if not packet.ssrc == self.allowedSource:
common.free_rtp_packet(packet)
return
# down sample the data
args = []
fmt = '%dh' % (len(data) / 4)
s = struct.unpack('%dh' % (len(data) / 2), data)
args.append(fmt)
for i in range(0, len(s), 2):
args.append(s[i])
sdata = apply(struct.pack, args)
# buffer the data
if self.buffers.has_key(packet.ssrc) and self.buffers[packet.ssrc]:
packets = self.buffers[packet.ssrc]
packets = self.buffers[packet.ssrc] + sdata
self.buffers[packet.ssrc] = packets
else:
self.buffers[packet.ssrc] = sdata
common.free_rtp_packet(event.data)
return
# L16 - 8kHz
pt = 122
destination = None
try:
data = self.buffers[packet.ssrc]
# Create a new source for each stream to send
# to the multicast address. Each new source is
# keeping track of its own timestamp.
if self.sources.has_key(packet.ssrc):
destination = self.sources[packet.ssrc]
else:
destination = common.Rtp(self.to_address, self.to_port,
self.to_port, 127, 64000.0, None)
dest_ssrc = destination.my_ssrc()
tool = "audiotest.py"
name = "RTP Messer"
destination.set_sdes(dest_ssrc, common.RTCP_SDES_TOOL, tool,
len(tool))
destination.set_sdes(dest_ssrc, common.RTCP_SDES_NAME, name,
len(name))
destination.send_ctrl(0, None)
self.sources[packet.ssrc] = destination
# Each source keeps track of its own timestamp.
if self.timeStamps.has_key(packet.ssrc):
ts = self.timeStamps[packet.ssrc]
else:
self.timeStamps[packet.ssrc] = 0
ts = 0
# Send data
destination.send_data(ts, pt,
packet.m, packet.cc, packet.csrc, data,
len(data), packet.extn, packet.extn_len,
packet.extn_type)
# Increment timestamp
self.timeStamps[packet.ssrc] = ts + 160
except Exception, e:
print "Exception sending data, ", e
class L16_to_L8(RTPSensor):
'''
Class for down-sampling L16-16kHz to L16-8kHz audio.
'''
def __init__(self,
from_address,
from_port,
to_address,
to_port,
selector=0):
RTPSensor.__init__(self, from_address, from_port)
self.handlerDict[0] = self.do_RTP
self.handlerDict[3] = self.do_SDES
self.buffers = {}
self.sources = {}
self.sdes = {}
self.selector = selector
self.timeStamps = {}
self.to_address = to_address
self.to_port = to_port
self.allowedSource = None
# Access methods
def GetSources(self):
return self.sdes
def SetAllowedSource(self, ssrc):
self.allowedSource = ssrc
def do_SDES(self, session, event):
sdestype, sdes = common.make_sdes_item(event.data)
ssrc = event.ssrc
if self.sdes.has_key(ssrc):
if sdestype == 2:
self.sdes[ssrc] = sdes
else:
if ((sdestype == 1) or (sdestype == 2)):
self.sdes[ssrc] = sdes
def do_RTP(self, session, event):
'''
Method called when an rtp data packet arrives.
'''
packet = common.make_rtp_packet(event.data)
data = common.rtp_packet_getdata(packet)
# require l16-16k mono as input
if packet.pt != 112:
common.free_rtp_packet(packet)
return
# only forward selected source
if self.selector:
if not packet.ssrc == self.allowedSource:
common.free_rtp_packet(packet)
return
# down sample the data
args = []
fmt = '%dh' % (len(data) / 4)
s = struct.unpack('%dh' % (len(data) / 2), data)
args.append(fmt)
for i in range(0, len(s), 2):
args.append(s[i])
sdata = apply(struct.pack, args)
# buffer the data
if self.buffers.has_key(packet.ssrc) and self.buffers[packet.ssrc]:
packets = self.buffers[packet.ssrc]
packets = self.buffers[packet.ssrc] + sdata
self.buffers[packet.ssrc] = packets
else:
self.buffers[packet.ssrc] = sdata
common.free_rtp_packet(event.data)
return
# L16 - 8kHz
pt = 122
destination = None
try:
data = self.buffers[packet.ssrc]
# Create a new source for each stream to send
# to the multicast address. Each new source is
# keeping track of its own timestamp.
if self.sources.has_key(packet.ssrc):
destination = self.sources[packet.ssrc]
else:
destination = common.Rtp(self.to_address, self.to_port,
self.to_port, 127, 64000.0, None)
dest_ssrc = destination.my_ssrc()
tool = "audiotest.py"
name = "RTP Messer"
destination.set_sdes(dest_ssrc, common.RTCP_SDES_TOOL, tool,
len(tool))
destination.set_sdes(dest_ssrc, common.RTCP_SDES_NAME, name,
len(name))
destination.send_ctrl(0, None)
self.sources[packet.ssrc] = destination
# Each source keeps track of its own timestamp.
if self.timeStamps.has_key(packet.ssrc):
ts = self.timeStamps[packet.ssrc]
else:
self.timeStamps[packet.ssrc] = 0
ts = 0
# Send data
destination.send_data(ts, pt,
packet.m, packet.cc, packet.csrc, data,
len(data), packet.extn, packet.extn_len,
packet.extn_type)
# Increment timestamp
self.timeStamps[packet.ssrc] = ts + 160
except Exception, e:
print "Exception sending data, ", e
# Send control packet
destination.send_ctrl(self.timeStamps[packet.ssrc], None)
destination.update()
common.free_rtp_packet(event.data)
# Clear the buffer
self.buffers[packet.ssrc] = None
class VideoSelector(RTPSensor):
'''
Class for down-sampling L16-16kHz to L16-8kHz audio.
'''
def __init__(self,
from_address,
from_port,
to_address,
to_port,
selector=0):
RTPSensor.__init__(self, from_address, from_port)
self.handlerDict[0] = self.do_RTP
self.handlerDict[3] = self.do_SDES
self.buffers = {}
self.sources = {}
self.sdes = {}
self.selector = selector
self.to_address = to_address
self.to_port = to_port
self.allowedSource = None
# Access methods
def GetSources(self):
return self.sdes
def SetAllowedSource(self, ssrc):
self.allowedSource = ssrc
def do_SDES(self, session, event):
sdestype, sdes = common.make_sdes_item(event.data)
ssrc = event.ssrc
if self.sdes.has_key(ssrc):
if sdestype == 2:
self.sdes[ssrc] = sdes
else:
if ((sdestype == 1) or (sdestype == 2)):
self.sdes[ssrc] = sdes
def do_RTP(self, session, event):
'''
Method called when an rtp data packet arrives.
'''
packet = common.make_rtp_packet(event.data)
data = common.rtp_packet_getdata(packet)
# require H261 as input
if packet.pt != 31:
common.free_rtp_packet(packet)
return
# only forward selected source
if self.selector:
if not packet.ssrc == self.allowedSource:
common.free_rtp_packet(packet)
return
pt = 31
destination = None
try:
# Create a new source for each stream to send
# to the multicast address. Each new source is
# keeping track of its own timestamp.
if self.sources.has_key(packet.ssrc):
destination = self.sources[packet.ssrc]
else:
destination = common.Rtp(self.to_address, self.to_port,
self.to_port, 127, 64000.0, None)
dest_ssrc = destination.my_ssrc()
tool = "audiotest.py"
name = "RTP Messer"
destination.set_sdes(dest_ssrc, common.RTCP_SDES_TOOL, tool,
len(tool))
destination.set_sdes(dest_ssrc, common.RTCP_SDES_NAME, name,
len(name))
#destination.send_ctrl(0, None)
self.sources[packet.ssrc] = destination
# Send data
ts = 0
destination.send_data(ts, packet.pt,
packet.m, packet.cc, packet.csrc, data,
len(data), packet.extn, packet.extn_len,
packet.extn_type)
# Increment timestamp
except Exception, e:
print "Exception sending data, ", e
# Send control packet
destination.send_ctrl(0, None)
destination.update()
common.free_rtp_packet(event.data)
def do_RTP(self, session, event):
'''
Method called when an rtp data packet arrives.
'''
packet = common.make_rtp_packet(event.data)
data = common.rtp_packet_getdata(packet)
# require l16-16k mono as input
if packet.pt != 112:
common.free_rtp_packet(packet)
return
# only forward selected source
if self.selector:
if not packet.ssrc == self.allowedSource:
common.free_rtp_packet(packet)
return
# down sample the data
args = []
fmt = '%dh' % (len(data)/4)
s = struct.unpack('%dh' % (len(data)/2) , data)
args.append(fmt)
for i in range(0, len(s), 2):
args.append(s[i])
sdata = apply(struct.pack,args)
# buffer the data
if self.buffers.has_key(packet.ssrc) and self.buffers[packet.ssrc]:
packets = self.buffers[packet.ssrc]
packets = self.buffers[packet.ssrc] + sdata
self.buffers[packet.ssrc] = packets
else:
self.buffers[packet.ssrc] = sdata
common.free_rtp_packet(event.data)
return
# L16 - 8kHz
pt = 122
destination = None
try:
data = self.buffers[packet.ssrc]
# Create a new source for each stream to send
# to the multicast address. Each new source is
# keeping track of its own timestamp.
if self.sources.has_key(packet.ssrc):
destination = self.sources[packet.ssrc]
else:
destination = common.Rtp(self.to_address, self.to_port,
self.to_port, 127,
64000.0, None)
dest_ssrc = destination.my_ssrc()
tool = "audiotest.py"
name = "RTP Messer"
destination.set_sdes(dest_ssrc, common.RTCP_SDES_TOOL,
tool, len(tool))
destination.set_sdes(dest_ssrc, common.RTCP_SDES_NAME,
name, len(name))
destination.send_ctrl(0, None)
self.sources[packet.ssrc] = destination
# Each source keeps track of its own timestamp.
if self.timeStamps.has_key(packet.ssrc):
ts = self.timeStamps[packet.ssrc]
else:
self.timeStamps[packet.ssrc] = 0
ts = 0
# Send data
destination.send_data(ts, pt, packet.m,
packet.cc, packet.csrc,
data, len(data),
packet.extn, packet.extn_len,
packet.extn_type)
# Increment timestamp
self.timeStamps[packet.ssrc] = ts + 160
except Exception, e:
print "Exception sending data, ", e