本文整理汇总了Python中bitstring.BitStream.bytepos方法的典型用法代码示例。如果您正苦于以下问题：Python BitStream.bytepos方法的具体用法？Python BitStream.bytepos怎么用？Python BitStream.bytepos使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类bitstring.BitStream的用法示例。
在下文中一共展示了BitStream.bytepos方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: __init__
# 需要导入模块: from bitstring import BitStream [as 别名]
# 或者: from bitstring.BitStream import bytepos [as 别名]
def __init__(self, data, ts_packets):
self.bytes = data
first_ts = ts_packets[0]
self.pid = first_ts.pid
self.byte_offset = first_ts.byte_offset
self.size = len(ts_packets) * TSPacket.SIZE
self.random_access = first_ts.random_access_indicator
self.ts_packets = ts_packets
data = BitStream(data)
start_code = data.read("uint:24")
if start_code != 0x000001:
raise Exception("packet_start_code_prefix is 0x{:06X} but should "
"be 0x000001".format(start_code))
self.stream_id = data.read("uint:8")
pes_packet_length = data.read("uint:16")
if StreamID.has_pes_header(self.stream_id):
bits = data.read("uint:2")
if bits != 2:
raise Exception("First 2 bits of a PES header should be 0x2 "
"but saw 0x{:02X}'".format(bits))
self.pes_scrambling_control = data.read("uint:2")
self.pes_priority = data.read("bool")
self.data_alignment_indicator = data.read("bool")
self.copyright = data.read("bool")
self.original_or_copy = data.read("bool")
pts_dts_flags = data.read("uint:2")
escr_flag = data.read("bool")
es_rate_flag = data.read("bool")
dsm_trick_mode_flag = data.read("bool")
additional_copy_info_flag = data.read("bool")
pes_crc_flag = data.read("bool")
pes_extension_flag = data.read("bool")
pes_header_data_length = data.read("uint:8")
if pts_dts_flags & 2:
bits = data.read("uint:4")
if bits != pts_dts_flags:
raise Exception(
"2 bits before PTS should be 0x{:02X} but saw 0x{"
":02X}".format(pts_dts_flags, bits))
self.pts = read_timestamp("PTS", data)
if pts_dts_flags & 1:
bits = data.read("uint:4")
if bits != 0x1:
raise Exception("2 bits before DTS should be 0x1 but saw "
"0x{:02X}".format(bits))
self.dts = read_timestamp("DTS", data)
# skip the rest of the header and stuffing bytes
data.bytepos = pes_header_data_length + 9
if self.stream_id == StreamID.PADDING:
self.payload = None
else:
self.payload = data.read("bytes")示例2: parse
# 需要导入模块: from bitstring import BitStream [as 别名]
# 或者: from bitstring.BitStream import bytepos [as 别名]
def parse(self):
bs = BitStream(filename=self.file_path)
[index_start, extension_data_start] = parse_header(bs)
self.app_info = parse_app_info(bs)
bs.bytepos = index_start
self.indexes = parse_index(bs)
self.parsed = True示例3: parse
# 需要导入模块: from bitstring import BitStream [as 别名]
# 或者: from bitstring.BitStream import bytepos [as 别名]
def parse(data, byte_offset):
ts = TSPacket(None)
ts.byte_offset = byte_offset
data = BitStream(data)
sync_byte = data.read("uint:8")
if sync_byte != TSPacket.SYNC_BYTE:
raise Exception(
"First byte of TS packet at offset {} is not a sync byte."
.format(byte_offset))
ts.transport_error_indicator = data.read("bool")
ts.payload_unit_start_indicator = data.read("bool")
ts.transport_priority = data.read("bool")
ts.pid = data.read("uint:13")
ts.scrambling_control = data.read("uint:2")
# adaptation_field_control
has_adaptation_field = data.read("bool")
has_payload = data.read("bool")
ts.continuity_counter = data.read("uint:4")
if has_adaptation_field:
adaptation_field_length = data.read("uint:8")
if adaptation_field_length:
ts.discontinuity_indicator = data.read("bool")
ts.random_access_indicator = data.read("bool")
ts.elementary_stream_priority_indicator = data.read("bool")
pcr_flag = data.read("bool")
opcr_flag = data.read("bool")
splicing_point_flag = data.read("bool")
transport_private_data_flag = data.read("bool")
adaptation_field_extension_flag = data.read("bool")
if pcr_flag:
ts.program_clock_reference_base = data.read("uint:33")
data.read(6) # reserved
ts.program_clock_reference_extension = data.read("uint:9")
if opcr_flag:
ts.original_program_clock_reference_base = data.read(
"uint:33")
data.read(6) # reserved
ts.original_program_clock_reference_extension = data.read(
"uint:9")
if splicing_point_flag:
ts.splice_countdown = data.read("uint:8")
if transport_private_data_flag:
transport_private_data_length = data.read("uint:8")
ts.private_data = data.read(
transport_private_data_length * 8).bytes
if adaptation_field_extension_flag:
adaptation_field_extension_length = data.read("uint:8")
ltw_flag = data.read("bool")
piecewise_rate_flag = data.read("bool")
seamless_splice_flag = data.read("bool")
data.read(5) # reserved
if ltw_flag:
ts.ltw_valid_flag = data.read("bool")
ts.ltw_offset = data.read("uint:15")
if piecewise_rate_flag:
data.read(2) # reserved
ts.piecewise_rate = data.read("uint:22")
if seamless_splice_flag:
ts.splice_type = data.read("uint:4")
ts.dts_next_au = read_timestamp("DTS_next_AU", data)
# Skip the rest of the header and padding bytes
data.bytepos = adaptation_field_length + 5
if has_payload:
ts.payload = data.read("bytes")
return ts