def __init__(self, f):
if DEBUG:
print("__DATA_GROUP_START__")
self._stuffing_byte = read.ucb(f)
if DEBUG:
print hex(self._stuffing_byte)
if (self._stuffing_byte is not 0x80):
raise DataGroupParseError(
"Initial stuffing byte not equal to 0x80: " +
hex(self._stuffing_byte))
self._data_identifier = read.ucb(f)
if DEBUG:
print hex(self._data_identifier)
if self._data_identifier is not 0xff:
raise DataGroupParseError(
"Initial data identifier is not equal to 0xff" +
hex(self._data_identifier))
self._private_stream_id = read.ucb(f)
if DEBUG:
print hex(self._private_stream_id)
if self._private_stream_id is not 0xf0:
raise DataGroupParseError("Private stream id not equal to 0xf0: " +
hex(self._private_stream_id))
self._group_id = read.ucb(f)
if DEBUG:
print 'group id ' + str((self._group_id >> 2) & (~0x20))
self._group_link_number = read.ucb(f)
if DEBUG:
print str(self._group_link_number)
self._last_group_link_number = read.ucb(f)
if DEBUG:
print str(self._last_group_link_number)
if self._group_link_number != self._last_group_link_number:
print("This is data group packet " + str(self._group_link_number) +
" of " + str(self._last_group_link_number))
self._data_group_size = read.usb(f)
if DEBUG:
print 'data group size found is ' + str(self._data_group_size)
if not self.is_management_data():
self._payload = CaptionStatementData(f)
else:
#self._payload = f.read(self._data_group_size)
#self._payload = read.buffer(f, self._data_group_size)
self._payload = CaptionManagementData(f)
self._crc = read.usb(f)
if DEBUG:
print 'crc value is ' + str(self._crc)
def __init__(self, f):
'''Initialize object off of file descriptor
'''
self._discontinuity_indicator = False
self._random_access_indicator = False
self._es_priority_indicator = False
self._pcr_flag = False
self._ocr_flag = False
self._splicing_point_flag = False
self._transport_private_data_flag = False
self._adaptation_field_extension_flag = False
self._payload = []
self._pcr = 0
self._ocr = 0
self._adaptation_field_length = read.ucb(f)
#Adaptation field length CAN be zero if only one byte stuffing is needed
#So we only draw out other info when it's nonzero.
if self._adaptation_field_length == 0:
return
bytes_read = 0
flags = read.ucb(f)
#print('flags {f:02X}'.format(f=flags))
bytes_read += 1
self._discontinuity_indicator = bool(flags & 0x80)
self._random_access_indicator = bool(flags & 0x40)
self._es_priority_indicator = bool(flags & 0x20)
self._pcr_flag = bool(flags & 0x10)
self._ocr_flag = bool(flags & 0x08)
self._splicing_point_flag = bool(flags & 0x04)
self._transport_private_data_flag = bool(flags & 0x20)
self._adaptation_field_extension_flag = bool(flags & 0x01)
if self._pcr_flag:
self._pcr = read.uib(f)
additional_bytes = read.usb(f)
self._pcr = (self._pcr << 1) | ((additional_bytes >> 15))
bytes_read += 6
if self._ocr_flag:
self._ocr = read.uib(f)
additional_bytes = read.usb(f)
bytes_read += 6
#print ('af length {l} and bytes read {b}'.format(l=self._adaptation_field_length, b=bytes_read))
self._payload = [
read.ucb(f)
for x in range(self._adaptation_field_length - bytes_read)
]
def __init__(self, f):
'''Copy packet data from file f to structure
'''
sync_byte = read.ucb(f)
if sync_byte != TSPacket.SYNC_BYTE:
raise DecodingError(
"Incorrect sync byte found at start of TS packet.")
pid_bytes = read.usb(f)
self._pid = 0x0fff & pid_bytes
self._payload_start_indicator = bool(0xf000 & pid_bytes)
#(2 bit scrambling control =00, 1 bit adaptation exists=true, 1 bit payload exists=true, 4 bit continuity counter =0xc)
flags_byte = read.ucb(f)
self._scrambling_control = 0xc0 & flags_byte
self._adaptation_field_exists = bool(0x20 & flags_byte)
self._payload_exists = bool(0x10 & flags_byte)
self._continuity_counter = 0x0f & flags_byte
if self._adaptation_field_exists:
self._adaptation_field = AdaptationField(f)
self._payload = [
read.ucb(f)
for x in range(188 - 4 - len(self._adaptation_field))
]
else:
self._payload = [read.ucb(f) for x in range(188 - 4)]
def __init__(self, f):
if DEBUG:
print("__DATA_GROUP_START__")
self._stuffing_byte = read.ucb(f)
if DEBUG:
print hex(self._stuffing_byte)
if(self._stuffing_byte is not 0x80):
raise DataGroupParseError("Initial stuffing byte not equal to 0x80: " + hex(self._stuffing_byte))
self._data_identifier = read.ucb(f)
if DEBUG:
print hex(self._data_identifier)
if self._data_identifier is not 0xff:
raise DataGroupParseError("Initial data identifier is not equal to 0xff" + hex(self._data_identifier))
self._private_stream_id = read.ucb(f)
if DEBUG:
print hex(self._private_stream_id)
if self._private_stream_id is not 0xf0:
raise DataGroupParseError("Private stream id not equal to 0xf0: " + hex(self._private_stream_id))
self._group_id = read.ucb(f)
if DEBUG:
print 'group id ' + str((self._group_id >> 2)&(~0x20))
self._group_link_number = read.ucb(f)
if DEBUG:
print str(self._group_link_number)
self._last_group_link_number = read.ucb(f)
if DEBUG:
print str(self._last_group_link_number)
if self._group_link_number != self._last_group_link_number:
print("This is data group packet " + str(self._group_link_number) + " of " + str(self._last_group_link_number))
self._data_group_size = read.usb(f)
if DEBUG:
print 'data group size found is ' + str(self._data_group_size)
if not self.is_management_data():
self._payload = CaptionStatementData(f)
else:
#self._payload = f.read(self._data_group_size)
#self._payload = read.buffer(f, self._data_group_size)
self._payload = CaptionManagementData(f)
self._crc = read.usb(f)
if DEBUG:
print 'crc value is ' + str(self._crc)
def __init__(self, f):
'''Initialize object off of file descriptor
'''
self._discontinuity_indicator = False
self._random_access_indicator = False
self._es_priority_indicator = False
self._pcr_flag = False
self._ocr_flag = False
self._splicing_point_flag = False
self._transport_private_data_flag = False
self._adaptation_field_extension_flag = False
self._payload = []
self._pcr = 0
self._ocr = 0
self._adaptation_field_length = read.ucb(f)
#Adaptation field length CAN be zero if only one byte stuffing is needed
#So we only draw out other info when it's nonzero.
if self._adaptation_field_length == 0:
return
bytes_read = 0
flags = read.ucb(f)
#print('flags {f:02X}'.format(f=flags))
bytes_read += 1
self._discontinuity_indicator = bool(flags & 0x80)
self._random_access_indicator = bool(flags & 0x40)
self._es_priority_indicator = bool(flags & 0x20)
self._pcr_flag = bool(flags & 0x10)
self._ocr_flag = bool(flags & 0x08)
self._splicing_point_flag = bool(flags & 0x04)
self._transport_private_data_flag = bool(flags & 0x20)
self._adaptation_field_extension_flag = bool(flags & 0x01)
if self._pcr_flag:
self._pcr = read.uib(f)
additional_bytes= read.usb(f)
self._pcr = (self._pcr<<1)|((additional_bytes>>15))
bytes_read += 6
if self._ocr_flag:
self._ocr = read.uib(f)
additional_bytes = read.usb(f)
bytes_read += 6
#print ('af length {l} and bytes read {b}'.format(l=self._adaptation_field_length, b=bytes_read))
self._payload = [read.ucb(f) for x in range(self._adaptation_field_length-bytes_read)]
def __init__(self, f):
"""
:param f: file descriptor we're reading from
"""
self._character_code = read.usb(f)
self._number_of_font = read.ucb(f)
self._fonts = []
for i in range(self._number_of_font):
self._fonts.append(DRCSFont(f))
def __init__(self, f):
self._stuffing_byte = read.ucb(f)
if DEBUG:
print str(self._stuffing_byte)
if(self._stuffing_byte is not 0x80):
raise ValueError
self._data_identifier = read.ucb(f)
if DEBUG:
print str(self._data_identifier)
if self._data_identifier is not 0xff:
raise ValueError
self._private_stream_id = read.ucb(f)
if DEBUG:
print str(self._private_stream_id)
if self._private_stream_id is not 0xf0:
raise ValueError
self._group_id = read.ucb(f)
if DEBUG:
print 'group id ' + str((self._group_id >> 2)&(~0x20))
self._group_link_number = read.ucb(f)
if DEBUG:
print str(self._group_link_number)
self._last_group_link_number = read.ucb(f)
if DEBUG:
print str(self._last_group_link_number)
self._data_group_size = read.usb(f)
if DEBUG:
print 'data group size found is ' + str(self._data_group_size)
if not self.is_management_data():
self._payload = CaptionStatementData(f)
else:
#self._payload = f.read(self._data_group_size)
self._payload = read.buffer(f, self._data_group_size)
self._crc = read.usb(f)
if DEBUG:
print 'crc value is ' + str(self._crc)
def __init__(self, f):
self._stuffing_byte = read.ucb(f)
if DEBUG:
print str(self._stuffing_byte)
if (self._stuffing_byte is not 0x80):
raise ValueError
self._data_identifier = read.ucb(f)
if DEBUG:
print str(self._data_identifier)
if self._data_identifier is not 0xff:
raise ValueError
self._private_stream_id = read.ucb(f)
if DEBUG:
print str(self._private_stream_id)
if self._private_stream_id is not 0xf0:
raise ValueError
self._group_id = read.ucb(f)
if DEBUG:
print 'group id ' + str((self._group_id >> 2) & (~0x20))
self._group_link_number = read.ucb(f)
if DEBUG:
print str(self._group_link_number)
self._last_group_link_number = read.ucb(f)
if DEBUG:
print str(self._last_group_link_number)
self._data_group_size = read.usb(f)
if DEBUG:
print 'data group size found is ' + str(self._data_group_size)
if not self.is_management_data():
self._payload = CaptionStatementData(f)
else:
#self._payload = f.read(self._data_group_size)
self._payload = read.buffer(f, self._data_group_size)
self._crc = read.usb(f)
if DEBUG:
print 'crc value is ' + str(self._crc)
def __init__(self, f):
'''Copy packet data from file f to structure
'''
sync_byte = read.ucb(f)
if sync_byte != TSPacket.SYNC_BYTE:
raise DecodingError("Incorrect sync byte found at start of TS packet.")
pid_bytes = read.usb(f)
self._pid = 0x0fff & pid_bytes
self._payload_start_indicator = bool(0xf000 & pid_bytes)
#(2 bit scrambling control =00, 1 bit adaptation exists=true, 1 bit payload exists=true, 4 bit continuity counter =0xc)
flags_byte = read.ucb(f)
self._scrambling_control = 0xc0 & flags_byte
self._adaptation_field_exists = bool(0x20 & flags_byte)
self._payload_exists = bool(0x10 & flags_byte)
self._continuity_counter = 0x0f & flags_byte
if self._adaptation_field_exists:
self._adaptation_field = AdaptationField(f)
self._payload = [read.ucb(f) for x in range(188-4-len(self._adaptation_field))]
else:
self._payload = [read.ucb(f) for x in range(188-4)]
