def __init__(self, pagereader):
"""pagereader is a PageReader object"""
self.__pagereader__ = pagereader
self.__page__ = Page(packet_continuation=0,
stream_beginning=0,
stream_end=0,
granule_position=0,
bitstream_serial_number=0,
sequence_number=0,
segments=[])
self.__current_segment__ = 1
def packets_to_pages(packets, bitstream_serial_number,
starting_sequence_number=0):
"""given an iterable of packet data strings,
yields a Page object per Ogg page necessary to hold those packets
packet_continuation is filled in as needed
stream_beginning and stream_end are False
granule_position is 0
sequence_number increments starting from "starting_sequence_number"
"""
from audiotools._ogg import Page
page = Page(
packet_continuation=False,
stream_beginning=False,
stream_end=False,
granule_position=0,
bitstream_serial_number=bitstream_serial_number,
sequence_number=starting_sequence_number,
segments=[])
for packet in packets:
for (i, segment) in enumerate(packet_to_segments(packet)):
if page.full():
yield page
starting_sequence_number += 1
page = Page(
packet_continuation=(i != 0),
stream_beginning=False,
stream_end=False,
granule_position=0,
bitstream_serial_number=bitstream_serial_number,
sequence_number=starting_sequence_number,
segments=[])
page.append(segment)
yield page
def packet_to_pages(packet, bitstream_serial_number,
starting_sequence_number=0):
"""given a string of packet data,
yields a Page object per Ogg page necessary to hold that packet
packet_continuation is filled in as needed
stream_beginning and stream_end are False
granule_position is 0
sequence_number increments starting from "starting_sequence_number"
"""
from audiotools._ogg import Page
page = Page(
packet_continuation=False,
stream_beginning=False,
stream_end=False,
granule_position=0,
bitstream_serial_number=bitstream_serial_number,
sequence_number=starting_sequence_number,
segments=[])
for segment in packet_to_segments(packet):
if (page.full()):
yield page
starting_sequence_number += 1
page = Page(
packet_continuation=True,
stream_beginning=False,
stream_end=False,
granule_position=0,
bitstream_serial_number=bitstream_serial_number,
sequence_number=starting_sequence_number,
segments=[])
page.append(segment)
yield page