def sync_bitstream(self, bitstream):
log.debug("start sync bitstream at wave pos: %s" % bitstream.pformat_pos())
bitstream.sync(32) # Sync bitstream to wave sinus cycle
# test_bitstream = list(itertools.islice(bitstream, 258 * 8))
# print_bitlist(test_bitstream)
log.debug("Searching for lead-in byte at wave pos: %s" % bitstream.pformat_pos())
# Searching for lead-in byte
lead_in_pattern = list(codepoints2bitstream(self.cfg.LEAD_BYTE_CODEPOINT))
max_pos = self.cfg.LEAD_BYTE_LEN * 8
try:
leader_pos = find_iter_window(bitstream, lead_in_pattern, max_pos)
except MaxPosArraived, err:
log.error("Error: Leader-Byte '%s' (%s) not found in the first %i Bytes! (%s)" % (
list2str(lead_in_pattern), hex(self.cfg.LEAD_BYTE_CODEPOINT),
self.cfg.LEAD_BYTE_LEN, err
))
def sync_bitstream(self, bitstream):
log.debug("start sync bitstream at wave pos: %s" %
bitstream.pformat_pos())
bitstream.sync(32) # Sync bitstream to wave sinus cycle
# test_bitstream = list(itertools.islice(bitstream, 258 * 8))
# print_bitlist(test_bitstream)
log.debug("Searching for lead-in byte at wave pos: %s" %
bitstream.pformat_pos())
# Searching for lead-in byte
lead_in_pattern = list(
codepoints2bitstream(self.cfg.LEAD_BYTE_CODEPOINT))
max_pos = self.cfg.LEAD_BYTE_LEN * 8
try:
leader_pos = find_iter_window(bitstream, lead_in_pattern, max_pos)
except MaxPosArraived, err:
log.error(
"Error: Leader-Byte '%s' (%s) not found in the first %i Bytes! (%s)"
%
(list2str(lead_in_pattern), hex(self.cfg.LEAD_BYTE_CODEPOINT),
self.cfg.LEAD_BYTE_LEN, err))
log.error("Error: Leader-Byte '%s' (%s) doesn't exist in bitstream! (%s)" % (
list2str(lead_in_pattern), hex(self.cfg.LEAD_BYTE_CODEPOINT), err
))
else:
log.info("Leader-Byte '%s' (%s) found at %i Bytes (wave pos: %s)" % (
list2str(lead_in_pattern), hex(self.cfg.LEAD_BYTE_CODEPOINT),
leader_pos, bitstream.pformat_pos()
))
log.debug("Search for sync-byte at wave pos: %s" % bitstream.pformat_pos())
# Search for sync-byte
sync_pattern = list(codepoints2bitstream(self.cfg.SYNC_BYTE_CODEPOINT))
max_search_bits = self.cfg.MAX_SYNC_BYTE_SEARCH * 8
try:
sync_pos = find_iter_window(bitstream, sync_pattern, max_search_bits)
except MaxPosArraived, err:
raise SyncByteNotFoundError(
"Error: Sync-Byte '%s' (%s) not found in the first %i Bytes! (%s)" % (
list2str(sync_pattern), hex(self.cfg.SYNC_BYTE_CODEPOINT),
self.cfg.MAX_SYNC_BYTE_SEARCH, err
)
)
except PatternNotFound, err:
raise SyncByteNotFoundError(
"Error: Sync-Byte '%s' (%s) doesn't exist in bitstream! (%s)" % (
list2str(sync_pattern), hex(self.cfg.SYNC_BYTE_CODEPOINT),
err
)
)
else:
% (list2str(lead_in_pattern), hex(
self.cfg.LEAD_BYTE_CODEPOINT), err))
else:
log.info(
"Leader-Byte '%s' (%s) found at %i Bytes (wave pos: %s)" %
(list2str(lead_in_pattern), hex(self.cfg.LEAD_BYTE_CODEPOINT),
leader_pos, bitstream.pformat_pos()))
log.debug("Search for sync-byte at wave pos: %s" %
bitstream.pformat_pos())
# Search for sync-byte
sync_pattern = list(codepoints2bitstream(self.cfg.SYNC_BYTE_CODEPOINT))
max_search_bits = self.cfg.MAX_SYNC_BYTE_SEARCH * 8
try:
sync_pos = find_iter_window(bitstream, sync_pattern,
max_search_bits)
except MaxPosArraived, err:
raise SyncByteNotFoundError(
"Error: Sync-Byte '%s' (%s) not found in the first %i Bytes! (%s)"
% (list2str(sync_pattern), hex(self.cfg.SYNC_BYTE_CODEPOINT),
self.cfg.MAX_SYNC_BYTE_SEARCH, err))
except PatternNotFound, err:
raise SyncByteNotFoundError(
"Error: Sync-Byte '%s' (%s) doesn't exist in bitstream! (%s)" %
(list2str(sync_pattern), hex(
self.cfg.SYNC_BYTE_CODEPOINT), err))
else:
log.info(
"Sync-Byte '%s' (%s) found at %i Bytes (wave pos: %s)" %
(list2str(sync_pattern), hex(self.cfg.SYNC_BYTE_CODEPOINT),
sync_pos, bitstream.pformat_pos()))
