def raw_track(self):
# List of sector IDs missing from the sector map:
missing = iter([x for x in range(self.nsec) if not x in self.map])
# Sector map with the missing entries filled in:
full_map = [next(missing) if x is None else x for x in self.map]
# Post-index track gap.
t = encode(bytes(128 * (self.nsec // 11)))
for nr, sec_id in zip(range(self.nsec), full_map):
sector = self.sector[sec_id]
label, data = (bytes(16), bytes(512)) if sector is None else sector
header = bytes([0xff, self.tracknr, sec_id, self.nsec - nr])
t += sync_bytes
t += encode(header)
t += encode(label)
t += encode(struct.pack('>I', checksum(header + label)))
t += encode(struct.pack('>I', checksum(data)))
t += encode(data)
t += encode(bytes(2))
# Add the pre-index gap.
tlen = 101376 * (self.nsec // 11)
t += bytes(tlen // 8 - len(t))
track = MasterTrack(bits=mfm_encode(t), time_per_rev=0.2)
track.verify = self
return track
def raw_track(self):
areas = heapq.merge(self.iams, self.sectors, key=lambda x: x.start)
t = bytes()
for a in areas:
start = a.start // 16 - self.gap_presync
gap = max(start - len(t) // 2, 0)
t += encode(bytes([self.gapbyte] * gap))
t += encode(bytes(self.gap_presync))
if isinstance(a, IAM):
t += iam_sync_bytes
elif isinstance(a, Sector):
idam = bytes(
[self.IDAM, a.idam.c, a.idam.h, a.idam.r, a.idam.n])
idam += struct.pack('>H', crc16.new(idam).crcValue)
t += sync(idam[0]) + encode(idam[1:])
start = a.dam.start // 16 - self.gap_presync
gap = max(start - len(t) // 2, 0)
t += encode(bytes([self.gapbyte] * gap))
t += encode(bytes(self.gap_presync))
dam = bytes([a.dam.mark]) + a.dam.data
dam += struct.pack('>H', crc16.new(dam).crcValue)
t += sync(dam[0]) + encode(dam[1:])
# Add the pre-index gap.
tlen = int((self.time_per_rev / self.clock) // 16)
gap = max(tlen - len(t) // 2, 0)
t += encode(bytes([self.gapbyte] * gap))
track = MasterTrack(bits=t, time_per_rev=self.time_per_rev)
track.verify = self
track.verify_revs = default_revs
return track
def raw_track(self):
track = MasterTrack(bits=self.bits,
time_per_rev=self.time_per_rev,
weak=self.weak)
track.verify = self
track.verify_revs = 1
return track
def get_track(self, cyl, head, writeout=False):
pi = self.pi
if head < pi.minhead or head > pi.maxhead:
return None
if cyl < pi.mincylinder or cyl > pi.maxcylinder:
return None
ti = CapsTrackInfoT2(2)
res = self.lib.CAPSLockTrack(ct.byref(ti), self.iid, cyl, head,
DI_LOCK.def_flags)
error.check(res == 0, "Could not lock IPF track %d.%d" % (cyl, head))
if not ti.trackbuf:
return None # unformatted/empty
carray_type = ct.c_ubyte * ((ti.tracklen + 7) // 8)
carray = carray_type.from_address(ct.addressof(ti.trackbuf.contents))
trackbuf = bitarray(endian='big')
trackbuf.frombytes(bytes(carray))
trackbuf = trackbuf[:ti.tracklen]
#for i in range(ti.sectorcnt):
# si = CapsSectorInfo()
# res = self.lib.CAPSGetInfo(ct.byref(si), self.iid,
# cyl, head, 1, i)
# error.check(res == 0, "Couldn't get sector info")
# range.append((si.datastart, si.datasize))
weak = []
for i in range(ti.weakcnt):
wi = CapsDataInfo()
res = self.lib.CAPSGetInfo(ct.byref(wi), self.iid, cyl, head, 2, i)
error.check(res == 0, "Couldn't get weak data info")
weak.append((wi.start, wi.size))
timebuf = None
if ti.timebuf:
carray_type = ct.c_uint * ti.timelen
carray = carray_type.from_address(ct.addressof(
ti.timebuf.contents))
# Unpack the per-byte timing info into per-bitcell
timebuf = []
for i in carray:
for j in range(8):
timebuf.append(i)
# Pad the timing info with normal cell lengths as necessary
for j in range(len(carray) * 8, ti.tracklen):
timebuf.append(1000)
# Clip the timing info, if necessary.
timebuf = timebuf[:ti.tracklen]
# We don't really have access to the bitrate. It depends on RPM.
# So we assume a rotation rate of 300 RPM (5 rev/sec).
rpm = 300
track = MasterTrack(bits=trackbuf,
time_per_rev=60 / rpm,
bit_ticks=timebuf,
splice=ti.overlap,
weak=weak)
return track
def get_track(self, cyl, side):
if (cyl, side) not in self.to_track:
return None
bitlen, rawbytes = self.to_track[cyl, side]
tdat = bitarray(endian='little')
tdat.frombytes(rawbytes)
track = MasterTrack(bits=tdat[:bitlen],
time_per_rev=bitlen / (2000 * self.opts.bitrate))
return track
def get_track(self, cyl, side, writeout=False):
if side >= self.nr_sides or cyl < self.start_cyl:
return None
off = cyl * self.nr_sides + side
if off >= len(self.track_list):
return None
bitlen, rawbytes = self.track_list[off]
tdat = bitarray(endian='little')
tdat.frombytes(rawbytes)
track = MasterTrack(bits=tdat[:bitlen],
time_per_rev=bitlen / (2000 * self.bitrate))
return track
def raw_track(self):
areas = heapq.merge(self.iams, self.sectors, key=lambda x:x.start)
t = bytes()
for a in areas:
start = a.start//16 - self.gap_presync
gap = max(start - len(t)//2, 0)
t += encode(bytes([self.filler] * gap))
t += encode(bytes(self.gap_presync))
if isinstance(a, IAM):
t += iam_sync_bytes
t += encode(bytes([self.IAM]))
elif isinstance(a, Sector):
t += sync_bytes
idam = bytes([0xa1, 0xa1, 0xa1, self.IDAM,
a.idam.c, a.idam.h, a.idam.r, a.idam.n])
idam += struct.pack('>H', crc16.new(idam).crcValue)
t += encode(idam[3:])
start = a.dam.start//16 - self.gap_presync
gap = max(start - len(t)//2, 0)
t += encode(bytes([self.filler] * gap))
t += encode(bytes(self.gap_presync))
t += sync_bytes
dam = bytes([0xa1, 0xa1, 0xa1, a.dam.mark]) + a.dam.data
dam += struct.pack('>H', crc16.new(dam).crcValue)
t += encode(dam[3:])
# Add the pre-index gap.
tlen = 200000//16
gap = max(tlen - len(t)//2, 0)
t += encode(bytes([self.filler] * gap))
track = MasterTrack(
bits = mfm_encode(t),
time_per_rev = 0.2)
track.verify = self
track.verify_revs = default_revs
return track
