def __init__(self, data, base_cls):
"""
Initialize our packet. Start point class required.
"""
BitStructure.__init__(self, self.__class__.__name__)
self.data = data
self.base_cls = base_cls
self.protocols = []
def parse_PES_START_INFO ( bs_input , data):
'''
Parsing data into PES_START_INFO and append it to bs_input (BitStructre)
'''
#log.debug("entering parse_PES_START_INFO")
bs = BitStructure('PES_START_INFO')
bs.append(BitField('packet_start_code_prefix', BYTE_SIZE * 3))
bs.append(BitField('stream_id', BYTE_SIZE * 1)) #defult 0xbd
bs.append(BitField('PES_packet_length', BYTE_SIZE * 2))
bs_input.append(bs)
flags = BitStructure('PES_HEADER_FLAGS')
flags.append(BitField('PES_fixed_value', BIT_SIZE * 2))
flags.append(BitField('PES_scrambling_control', BIT_SIZE * 2))
flags.append(BitField('PES_priority', BIT_SIZE * 1))
flags.append(BitField('data_alignment_indicator', BIT_SIZE * 1))
flags.append(BitField('copyright', BIT_SIZE * 1))
flags.append(BitField('original_or_copy', BIT_SIZE * 1))
flags.append(BitField('PTS_DTS_flags', BIT_SIZE * 2))
flags.append(BitField('ESCR_flag', BIT_SIZE * 1))
flags.append(BitField('ES_rate_flag', BIT_SIZE * 1))
flags.append(BitField('DSM_trick_mode_flag', BIT_SIZE * 1))
flags.append(BitField('addtional_copy_info_flag', BIT_SIZE * 1))
flags.append(BitField('PES_CRC_flag', BIT_SIZE * 1))
flags.append(BitField('PES_extention_flag', BIT_SIZE * 1))
bs_input.append(flags)
bs_input.set_array(data)
if (bs_input.field('PES_HEADER_FLAGS').field('PTS_DTS_flags').value() == 0x2):
bs_input.append(BitField('PES_HEADER_PTS_Length', BYTE_SIZE * 1))
pts = BitStructure('PES_HEADER_PTS')
pts.append(BitField('Fixed_PTS_HEADER', BIT_SIZE * 4 ))
pts.append(BitField('PTS 32..30', BIT_SIZE * 3 ))
pts.append(BitField('marker bit 1', BIT_SIZE * 1 ))
pts.append(BitField('PTS 29..15', BIT_SIZE * 15))
pts.append(BitField('marker bit 2', BIT_SIZE * 1 ))
pts.append(BitField('PTS 14..0', BIT_SIZE * 15))
pts.append(BitField('marker bit 3', BIT_SIZE * 1 ))
bs_input.append(pts)
bs_input.set_array(data)
parsed_pts = bs_input.field('PES_HEADER_PTS')
decimal_pts = convert_BLOB_TO_PTS(parsed_pts)
if (decimal_pts == 5426837):
print "found !!!"
print bs_input
print curr_pack_num
print "PTS in Decimal: "+str(decimal_pts)
parsed_pts.desc = "PTS in Decimal: "+str(decimal_pts)
else:
# No PTS in header
#log.error("No PTS in header")
return 1
#log.debug("exit parse_PES_START_INFO")
return 0
def __init__(self, *arg, **karg):
BitStructure.__init__(self, *arg, **karg)
def parseTS_Packet(data):
#log.debug("entering parseTS_Packet")
bs = BitStructure('PACKET')
bs.append(BitField('sync byte', BIT_SIZE * 8))
bs.append(BitField('Transport Error Indicator (TEI)', BIT_SIZE * 1)) #defult 0xbd
bs.append(BitField('Payload Unit Start Indicator', BIT_SIZE * 1))
bs.append(BitField('Transport Priority', BIT_SIZE * 1))
bs.append(BitField('PID', BIT_SIZE * 13))
bs.append(BitField('Scrambling control', BIT_SIZE * 2))
bs.append(BitField('Adaptation field exist', BIT_SIZE * 1))
bs.append(BitField('Payload data exist', BIT_SIZE * 1))
bs.append(BitField('Continuity counter', BIT_SIZE * 4))
bs.set_array(data)
pusi = bs.field('Payload Unit Start Indicator').value()
pid = bs.field('PID').value()
if (pusi == 0x1 and pid == 0x906):
print "PUSI !!! on: " + str(pid)
if (bs.field('Adaptation field exist').value() == 0x1):
parseTS_Adaptation(bs, data)
if (bs.field('Payload data exist').value() == 0x1) and (pusi == 0x1):
parse_PES_START_INFO(bs, data)
