def run_info(args):
try:
file = IQFile(args.file)
except Exception as e:
print(e, file=sys.stderr)
return 1
print(file.info(), file=sys.stderr)
return 0
def run_extract(args):
try:
file_in = IQFile(args.input)
except Exception as e:
print(e, file=sys.stderr)
return 1
# start stop length INVALID
# start stop none start stop
# start none length start start+length
# start none none start end
# none stop length Stop-length stop
# none stop none 0 stop
# none none length 0 length
# none none none INVALID
if args.start and args.stop and args.length:
raise ExtractError('Too many offset arguments')
elif args.start and args.stop and not args.length:
off_start = args.start.to_samples(file_in.sample_rate)
off_stop = args.stop.to_samples(file_in.sample_rate)
elif args.start and not args.stop and args.length:
off_start = args.start.to_samples(file_in.sample_rate)
off_stop = off_start + args.length.to_samples(file_in.sample_rate)
elif args.start and not args.stop and not args.length:
off_start = args.start.to_samples(file_in.sample_rate)
off_stop = file_in.samples
elif not args.start and args.stop and args.length:
off_stop = args.stop.to_samples(file_in.sample_rate)
off_start = off_stop - args.length.to_samples(file_in.sample_rate)
elif not args.start and args.stop and not args.length:
off_start = 0
off_stop = args.stop.to_samples(file_in.sample_rate)
elif not args.start and not args.stop and args.length:
off_start = 0
off_stop = args.length.to_samples(file_in.sample_rate)
else:
raise ExtractError('No offset arguments given')
# Sanity checks on borders:
if not (0 <= off_start <= off_stop <= file_in.samples):
raise ExtractError('Given offsets not reasonable')
# Until now, the offsets are in samples:
byte_start = off_start * file_in.samplesize * 2
byte_stop = off_stop * file_in.samplesize * 2
file_out = IQFile(args.output, create=True)
file_out.copy_header(file_in)
file_out.write_header()
for block in file_in.read_raw_iq(byte_start, byte_stop):
file_out.write_iq(block)
return 0
def run_tag(args):
try:
iqfile = IQFile(args.file)
except Exception as e:
print(e, file=sys.stderr)
return 1
if (not args.auto and not iqfile.has_header and
(args.sample_rate is None or args.center is None)):
print('Missing required arguments --center and --sample-rate', file=sys.stderr)
return 1
if args.auto:
filename = os.path.split(args.file)[1]
if filename.startswith('gqrx_'):
try:
_, date, time, frequency, samplerate, _ = filename.split('_')
dt = datetime.strptime(date + time, '%Y%m%d%H%M%S')
frequency = int(frequency)
samplerate = int(samplerate)
text = 'Tag autodetected'
except:
print('Autodetection not possible, please enter manually', file=sys.stderr)
return 1
else:
print('Autodetection not possible, please enter parameters manually', file=sys.stderr)
return 1
elif iqfile.has_header:
frequency = args.frequency or iqfile.frequency
samplerate = args.sample_rate or iqfile.sample_rate
text = args.text or iqfile.text
else:
dt = datetime.now()
frequency = args.center
samplerate = args.sample_rate
text = args.text if args.text else ''
iqfile.frequency = frequency
iqfile.datetime = dt
iqfile.sample_rate = samplerate
iqfile.text = text
iqfile.write_header()
return 0
