class BroadcasterInformationSection(Section):
"""ブロードキャスタ情報セクション BIT (ARIB-STD-B10-2-5.2.13)"""
_pids = [0x24]
_table_ids = [0xC4]
table_id = uimsbf(8)
section_syntax_indicator = bslbf(1)
reserved_future_use_1 = bslbf(1)
reserved_1 = bslbf(2)
section_length = uimsbf(12)
original_network_id = uimsbf(16)
reserved_2 = bslbf(2)
version_number = uimsbf(5)
current_next_indicator = bslbf(1)
section_number = uimsbf(8)
last_section_number = uimsbf(8)
reserved_future_use_2 = bslbf(3)
broadcast_view_propriety = bslbf(1)
first_descriptors_length = uimsbf(12)
descriptors = descriptors(first_descriptors_length)
@loop(lambda self: (self.section_length -
(self.first_descriptors_length + 11)))
class broadcasters(Syntax):
broadcaster_id = uimsbf(8)
reserved_future_use = bslbf(4)
broadcaster_descriptor_length = uimsbf(12)
descriptors = descriptors(broadcaster_descriptor_length)
CRC_32 = rpchof(32)
class BouquetAssociationSection(Section):
"""ブーケアソシエーションセクション BAT (ARIB-STD-B10-2-5.2.5)"""
_pids = [0x11]
_table_ids = [0x4A]
table_id = uimsbf(8)
section_syntax_indicator = bslbf(1)
reserved_future_use_1 = bslbf(1)
reserved_1 = bslbf(2)
section_length = uimsbf(12)
bouquet_id = uimsbf(16)
reserved_2 = bslbf(2)
version_number = uimsbf(5)
current_next_indicator = bslbf(1)
section_number = uimsbf(8)
last_section_number = uimsbf(8)
reserved_future_use_2 = bslbf(4)
bouquet_descriptors_length = uimsbf(12)
bouquet_descriptors = descriptors(bouquet_descriptors_length)
reserved_future_use_3 = bslbf(4)
transport_stream_loop_length = uimsbf(12)
@loop(transport_stream_loop_length)
class transport_streams(Syntax):
transport_stream_id = uimsbf(16)
original_network_id = uimsbf(16)
reserved_future_use = bslbf(4)
transport_descriptors_length = uimsbf(12)
descriptors = descriptors(transport_descriptors_length)
CRC_32 = rpchof(32)
class maps(Syntax):
stream_type = uimsbf(8)
reserved_1 = bslbf(3)
elementary_PID = uimsbf(13)
reserved_2 = bslbf(4)
ES_info_length = uimsbf(12)
descriptors = descriptors(ES_info_length)
class CommonDataSection(Section):
"""全受信機共通データセクション CDT (ARIB-STD-B21-12.2.2.2)"""
_pids = [0x29]
_table_ids = [0xC8]
table_id = uimsbf(8)
section_syntax_indicator = bslbf(1)
reserved_future_use_1 = bslbf(1)
reserved_1 = bslbf(2)
section_length = uimsbf(12)
download_data_id = uimsbf(16)
reserved_2 = bslbf(2)
version_number = uimsbf(5)
current_next_indicator = bslbf(1)
section_number = uimsbf(8)
last_section_number = uimsbf(8)
original_network_id = uimsbf(16)
data_type = uimsbf(8)
reserved_future_use_2 = bslbf(4)
descriptors_loop_length = uimsbf(12)
descriptors = descriptors(descriptors_loop_length)
# 地上デジタル放送ではdata_module_byteはCDT伝送方式サービスロゴである (ARIB-TR-B14-1-5.4.1.2)
logo_type = uimsbf(8)
reserved_future_use_3 = bslbf(7)
logo_id = uimsbf(9)
reserved_future_use_4 = bslbf(4)
logo_version = uimsbf(12)
data_size = uimsbf(16)
data_byte = raw(data_size)
CRC_32 = rpchof(32)
class NetworkInformationSection(Section):
"""ネットワーク情報セクション NIT (ARIB-STD-B10-2-5.2.4)"""
_pids = [0x10]
_table_ids = [0x40, 0x41]
table_id = uimsbf(8)
section_syntax_indicator = bslbf(1)
reserved_future_use_1 = bslbf(1)
reserved_1 = bslbf(2)
section_length = uimsbf(12)
network_id = uimsbf(16)
reserved_2 = bslbf(2)
version_number = uimsbf(5)
current_next_indicator = bslbf(1)
section_number = uimsbf(8)
last_section_number = uimsbf(8)
reserved_future_use_2 = bslbf(4)
network_descriptors_length = uimsbf(12)
network_descriptors = descriptors(network_descriptors_length)
reserved_future_use_3 = bslbf(4)
transport_stream_loop_length = uimsbf(12)
@loop(transport_stream_loop_length)
class transport_streams(Syntax):
transport_stream_id = uimsbf(16)
original_network_id = uimsbf(16)
reserved_future_use = bslbf(4)
transport_descriptors_length = uimsbf(12)
descriptors = descriptors(transport_descriptors_length)
CRC_32 = rpchof(32)
class events(Syntax):
event_id = uimsbf(16)
start_time = mjd(40)
duration = bcdtime(24)
running_status = uimsbf(3)
free_CA_mode = bslbf(1)
descriptors_loop_length = uimsbf(12)
descriptors = descriptors(descriptors_loop_length)
class relations(Syntax):
node_id = uimsbf(16)
collection_mode = uimsbf(4)
reserved_future_use_1 = bslbf(4)
parent_node_id = uimsbf(16)
reference_number = uimsbf(8)
reserved_future_use_2 = bslbf(4)
descriptors_loop_length = uimsbf(12)
descriptors = descriptors(descriptors_loop_length)
class services(Syntax):
service_id = uimsbf(16)
reserved_future_use = bslbf(3)
EIT_user_defined_flags = bslbf(3)
EIT_schedule_flag = bslbf(1)
EIT_present_following_flag = bslbf(1)
running_status = uimsbf(3)
free_CA_mode = bslbf(1)
descriptors_loop_length = uimsbf(12)
descriptors = descriptors(descriptors_loop_length)
class TimeOffsetSection(Section):
"""時刻日付オフセットセクション TOT (ARIB-STD-B10-2-5.2.9)"""
_pids = [0x14]
_table_ids = [0x73]
table_id = uimsbf(8)
section_syntax_indicator = bslbf(1)
reserved_future_use = bslbf(1)
reserved1 = bslbf(2)
section_length = uimsbf(12)
JST_time = mjd(40)
reserved_2 = bslbf(4)
descriptors_loop_length = uimsbf(12)
descriptors = descriptors(descriptors_loop_length)
CRC_32 = rpchof(32)
class ConditionalAccessSection(Section):
"""限定受信セクション CAT (ISO 13818-1 2.4.4.6)"""
_pids = [0x01]
_table_ids = [0x01]
table_id = uimsbf(8)
section_syntax_indicator = bslbf(1)
reserved_future_use = bslbf(1)
reserved_1 = bslbf(2)
section_length = uimsbf(12)
reserved_2 = bslbf(18)
version_number = uimsbf(5)
current_next_indicator = bslbf(1)
section_number = uimsbf(8)
last_section_number = uimsbf(8)
descriptors = descriptors(lambda self: self.section_length - 9)
CRC_32 = rpchof(32)
class groups(Syntax):
group = bslbf(4)
target_version = uimsbf(12)
new_version = uimsbf(12)
download_level = bslbf(2)
version_indicator = bslbf(2)
content_description_length = uimsbf(12)
reserved = bslbf(4)
schedule_description_length = uimsbf(12)
schedule_timeshift_information = uimsbf(4)
@loop(schedule_description_length)
class schedules(Syntax):
start_time = mjd(40)
duration = bcdtime(24)
descriptors = descriptors(lambda self:
(self.content_description_length - self.
schedule_description_length))
class IndexTransmissionSection(Section):
"""番組インデックス送出情報セクション ITT (ARIB-STD-B10-2-5.1.3)"""
_table_ids = [0xD2]
table_id = uimsbf(8)
section_syntax_indicator = bslbf(1)
reserved_future_use_1 = bslbf(1)
reserved_1 = bslbf(2)
section_length = uimsbf(12)
event_id = uimsbf(16)
reserved_2 = bslbf(2)
version_number = uimsbf(5)
current_next_indicator = bslbf(1)
section_number = uimsbf(8)
last_section_number = uimsbf(8)
reserved_future_use_2 = uimsbf(4)
descriptors_loop_length = uimsbf(12)
descriptors = descriptors(descriptors_loop_length)
CRC_32 = rpchof(32)
class ProgramMapSection(Section):
"""Program Map Section PMT (ISO 13818-1 2.4.4.8)"""
_table_ids = [0x02]
table_id = uimsbf(8)
section_syntax_indicator = bslbf(1)
reserved_future_use = bslbf(1)
reserved_1 = bslbf(2)
section_length = uimsbf(12)
program_number = uimsbf(16)
reserved_2 = bslbf(2)
version_number = uimsbf(5)
current_next_indicator = bslbf(1)
section_number = uimsbf(8)
last_section_number = uimsbf(8)
reserved_3 = bslbf(3)
PCR_PID = uimsbf(13)
reserved_4 = bslbf(4)
program_info_length = uimsbf(12)
descriptors = descriptors(program_info_length)
@loop(lambda self: self.section_length - (13 + self.program_info_length))
class maps(Syntax):
stream_type = uimsbf(8)
reserved_1 = bslbf(3)
elementary_PID = uimsbf(13)
reserved_2 = bslbf(4)
ES_info_length = uimsbf(12)
descriptors = descriptors(ES_info_length)
CRC_32 = rpchof(32)
@property
def caption_pid(self):
"""字幕データのあるPIDを返す。
字幕データはStream_typeが0x06(private data)で
ストリーム識別記述子のcomponent_tagが0x87であるもの。
参考: http://linux.papa.to/?date=20081224#p01
"""
for stream in self.maps:
try:
if stream.stream_type == 0x06 and\
stream.descriptors[StreamIdentifierDescriptor][0].component_tag == 0x87:
return stream.elementary_PID
except KeyError:
pass
def video_pids(self):
"動画パケットの PID を返すジェネレータ" ""
video_types = (0x01, 0x02, 0x10)
for stream in self.maps:
if stream.stream_type in video_types:
yield stream.elementary_PID
def audio_pids(self):
"""音声パケットの PID を返すジェネレータ"""
audio_types = (0x03, 0x04, 0x0F, 0x11)
for stream in self.maps:
if stream.stream_type in audio_types:
yield stream.elementary_PID
class links(Syntax):
description_id = uimsbf(16)
reserved_future_use = bslbf(12)
descriptors_loop_length = uimsbf(12)
descriptors = descriptors(descriptors_loop_length)
class transport_streams(Syntax):
transport_stream_id = uimsbf(16)
original_network_id = uimsbf(16)
reserved_future_use = bslbf(4)
transport_descriptors_length = uimsbf(12)
descriptors = descriptors(transport_descriptors_length)
class broadcasters(Syntax):
broadcaster_id = uimsbf(8)
reserved_future_use = bslbf(4)
broadcaster_descriptor_length = uimsbf(12)
descriptors = descriptors(broadcaster_descriptor_length)
class events(Syntax):
local_event_id = uimsbf(16)
reserved_fugure_use = bslbf(4)
descriptors_loop_length = uimsbf(12)
descriptors = descriptors(descriptors_loop_length)
