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QD: Re-indent mk_qd script and add new parameter to round up byte values to block size.

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This commit is contained in:
Keir Fraser
2023-03-31 14:50:19 +01:00
parent 38aa3c9000
commit faf9137bdb
1 changed files with 47 additions and 29 deletions
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scripts/mk_qd.py
+47 -29
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@@ -9,41 +9,59 @@
import sys,struct,argparse
def round_up(x, y):
return (x + y - 1) & ~(y - 1)
def main(argv):
parser = argparse.ArgumentParser(
formatter_class=argparse.ArgumentDefaultsHelpFormatter)
parser.add_argument("--lead-in", type=float, default=0.5,
help="lead-in, seconds")
parser.add_argument("--window", type=float, default=5.5,
help="data window, seconds")
parser.add_argument("--total", type=float, default=8.0,
help="total length, seconds")
parser.add_argument("outfile", help="output filename")
args = parser.parse_args(argv[1:])
parser = argparse.ArgumentParser(
formatter_class=argparse.ArgumentDefaultsHelpFormatter)
parser.add_argument("--lead-in", type=float, default=0.5,
help="lead-in, seconds")
parser.add_argument("--window", type=float, default=5.5,
help="data window, seconds")
parser.add_argument("--total", type=float, default=8.0,
help="total length, seconds")
parser.add_argument("--round", action="store_true",
help="round values up to 512-byte block size")
parser.add_argument("outfile", help="output filename")
args = parser.parse_args(argv[1:])
bit_ms = 0.004916
total_bytes = int(args.total * 1000.0 / bit_ms / 8)
window_bytes = int(args.window * 1000.0 / bit_ms / 8)
init_bytes = int(args.lead_in * 1000.0 / bit_ms / 8)
lead_in, window, total = args.lead_in, args.window, args.total
assert (2*init_bytes + window_bytes) < total_bytes, "Window too large"
print("Lead-In: %.2f sec -> %u bytes" % (args.lead_in, init_bytes))
print("Window: %.2f sec -> %u bytes" % (args.window, window_bytes))
print("TOTAL: %.2f sec -> %u bytes" % (args.total, total_bytes))
assert lead_in >= 0.1, "Insufficient lead-in"
assert total - window - lead_in >= 0.1, "Insufficient lead-out"
# Header
out_f = open(args.outfile, "wb")
out_f.write(struct.pack("<3x2s3x", b"QD"))
out_f.write(bytearray(b'\x00'*(512-8)))
bit_ms = 0.004916
total_bytes = int(total * 1000.0 / bit_ms / 8)
window_bytes = int(window * 1000.0 / bit_ms / 8)
init_bytes = int(lead_in * 1000.0 / bit_ms / 8)
# Track
out_f.write(struct.pack("<4I", 1024, total_bytes, init_bytes,
init_bytes + window_bytes))
out_f.write(bytearray(b'\x00'*(512-16)))
if args.round:
total_bytes = round_up(total_bytes, 512)
window_bytes = round_up(window_bytes, 512)
init_bytes = round_up(init_bytes, 512)
# Data
blocks = (total_bytes + 511) // 512
out_f.write(bytearray(b'\x11'*(blocks*512)))
print("Lead-In: %.2f sec -> %u bytes" % (lead_in, init_bytes))
print("Window: %.2f sec -> %u bytes" % (window, window_bytes))
print("TOTAL: %.2f sec -> %u bytes" % (total, total_bytes))
# Header
out_f = open(args.outfile, "wb")
out_f.write(struct.pack("<3x2s3x", b"QD"))
out_f.write(bytearray(b'\x00'*(512-8)))
# Track
out_f.write(struct.pack("<4I", 1024, total_bytes, init_bytes,
init_bytes + window_bytes))
out_f.write(bytearray(b'\x00'*(512-16)))
# Data
blocks = (total_bytes + 511) // 512
out_f.write(bytearray(b'\x11'*(blocks*512)))
if __name__ == "__main__":
main(sys.argv)
# Local variables:
# python-indent: 4
# End: