03b53c2d29
Add optional noise measurement (cheaper than the old version) Add optional DC filter (expensive, not really needed with rtlsdr input)
41 lines
1.6 KiB
C
41 lines
1.6 KiB
C
// Part of dump1090, a Mode S message decoder for RTLSDR devices.
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//
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// convert.h: support for various IQ -> magnitude conversions
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//
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// Copyright (c) 2015 Oliver Jowett <oliver@mutability.co.uk>
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//
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// This file is free software: you may copy, redistribute and/or modify it
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// under the terms of the GNU General Public License as published by the
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// Free Software Foundation, either version 2 of the License, or (at your
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// option) any later version.
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//
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// This file is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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#ifndef DUMP1090_CONVERT_H
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#define DUMP1090_CONVERT_H
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struct converter_state;
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typedef enum { INPUT_UC8=0, INPUT_SC16, INPUT_SC16Q11 } input_format_t;
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typedef void (*iq_convert_fn)(void *iq_data,
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uint16_t *mag_data,
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unsigned nsamples,
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struct converter_state *state,
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double *out_power);
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iq_convert_fn init_converter(input_format_t format,
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double sample_rate,
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int filter_dc,
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int compute_power,
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struct converter_state **out_state);
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void cleanup_converter(struct converter_state *state);
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#endif
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