def compress(self, uncomp_pkt):
""" Compress the given uncompressed packet
Keyword arguments:
uncomp_pkt -- the uncompressed packet (str)
Return tuple (return_code, compressed_packet):
status -- a value among ROHC_STATUS_*
comp_pkt -- the compressed packet (str) or None wrt status_code
"""
status = ROHC_STATUS_ERROR
timestamp = rohc_ts(0, 0)
# create the input buffer for the uncompressed packet
if isinstance(uncomp_pkt, bytes) is not True:
raise TypeError("compress(): argument 'uncomp_pkt' shall be "\
"'bytes' not '%s'" % type(uncomp_pkt))
uncomp_pkt_len = len(uncomp_pkt)
buf_uncomp = rohc_buf(uncomp_pkt, uncomp_pkt_len, timestamp)
if buf_uncomp is None:
return (status, None)
# create the output buffer for the compressed ROHC packet
buf_comp = rohc_buf(self._buf, 0, timestamp)
if buf_comp is None:
return (status, None)
# compress the uncompressed packet into one ROHC packet
status = rohc_compress4(self.comp, buf_uncomp, buf_comp)
if status != ROHC_STATUS_OK:
return (status, None)
return (status, self._buf[:buf_comp.len])
def compress(self, uncomp_pkt):
""" Compress the given uncompressed packet
Keyword arguments:
uncomp_pkt -- the uncompressed packet (str)
Return tuple (return_code, compressed_packet):
status -- a value among ROHC_STATUS_*
comp_pkt -- the compressed packet (str) or None wrt status_code
"""
status = ROHC_STATUS_ERROR
timestamp = rohc_ts(0, 0)
# create the input buffer for the uncompressed packet
if isinstance(uncomp_pkt, bytes) is not True:
raise TypeError("compress(): argument 'uncomp_pkt' shall be "\
"'bytes' not '%s'" % type(uncomp_pkt))
uncomp_pkt_len = len(uncomp_pkt)
buf_uncomp = rohc_buf(uncomp_pkt, uncomp_pkt_len, timestamp)
if buf_uncomp is None:
return (status, None)
# create the output buffer for the compressed ROHC packet
buf_comp = rohc_buf(self._buf, 0, timestamp)
if buf_comp is None:
return (status, None)
# compress the uncompressed packet into one ROHC packet
status = rohc_compress4(self.comp, buf_uncomp, buf_comp)
if status != ROHC_STATUS_OK:
return (status, None)
return (status, self._buf[:buf_comp.len])
def decompress(self, comp_pkt):
""" Decompress the given compressed ROHC packet
Keyword arguments:
comp_pkt -- the compressed ROHC packet (str)
Return tuple:
status -- a value among ROHC_STATUS_*
decomp_pkt -- the decompressed packet (str) or None wrt status_code
feedback_recv -- the feedback (str) received with the compressed packet
feedback_to_send -- the feedback (str) to send with the associated compressor
"""
status = ROHC_STATUS_ERROR
timestamp = rohc_ts(0, 0)
# create the input buffer for the compressed ROHC packet
if isinstance(comp_pkt, bytes) is not True:
raise TypeError("compress(): argument 'comp_pkt' shall be "\
"'bytes' not '%s'" % type(comp_pkt))
comp_pkt_len = len(comp_pkt)
buf_comp = rohc_buf(comp_pkt, comp_pkt_len, timestamp)
if buf_comp is None:
return (status, None, None, None)
# create the output buffer for the decompressed packet
buf_decomp = rohc_buf(self._buf1, 0, timestamp)
if buf_decomp is None:
return (status, None, None, None)
# create the buffers for feedbacks
buf_feedback_recv = rohc_buf(self._buf2, 0, timestamp)
if buf_feedback_recv is None:
return (status, None, None, None)
buf_feedback_to_send = rohc_buf(self._buf3, 0, timestamp)
if buf_feedback_to_send is None:
return (status, None, None, None)
# decompress the ROHC packet
status = rohc_decompress3(self.decomp, buf_comp, buf_decomp, \
buf_feedback_recv, buf_feedback_to_send)
if status != ROHC_STATUS_OK:
return (status, None, None, None)
return (status, self._buf1[:buf_decomp.len], \
self._buf2[:buf_feedback_recv.len], \
self._buf3[:buf_feedback_to_send.len])
def deliver_feedback(self, feedback):
""" Deliver the given feedback packet to the ROHC compressor
Keyword arguments:
feedback -- the feedback packet to deliver to the ROHC compressor
Return whether the feedback packet was successfully delivered to the
ROHC compressor or not (bool).
"""
timestamp = rohc_ts(0, 0)
# create the buffer for the feedback data
if isinstance(feedback, bytes) is not True:
raise TypeError("compress(): argument 'feedback' shall be "\
"'bytes' not '%s'" % type(feedback))
feedback_len = len(feedback)
buf_feedback = rohc_buf(feedback, feedback_len, timestamp)
if buf_feedback is None:
return False
return rohc_comp_deliver_feedback2(self.comp, buf_feedback)
def deliver_feedback(self, feedback):
""" Deliver the given feedback packet to the ROHC compressor
Keyword arguments:
feedback -- the feedback packet to deliver to the ROHC compressor
Return whether the feedback packet was successfully delivered to the
ROHC compressor or not (bool).
"""
timestamp = rohc_ts(0, 0)
# create the buffer for the feedback data
if isinstance(feedback, bytes) is not True:
raise TypeError("compress(): argument 'feedback' shall be "\
"'bytes' not '%s'" % type(feedback))
feedback_len = len(feedback)
buf_feedback = rohc_buf(feedback, feedback_len, timestamp)
if buf_feedback is None:
return False
return rohc_comp_deliver_feedback2(self.comp, buf_feedback)