1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
|
/*
* Copyright (C) 2016 Robin Gareus <robin@gareus.org>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef AUDIOGRAPHER_ANALYSER_H
#define AUDIOGRAPHER_ANALYSER_H
#include <fftw3.h>
#include "loudness_reader.h"
#include "ardour/export_analysis.h"
namespace AudioGrapher
{
class LIBAUDIOGRAPHER_API Analyser : public LoudnessReader
{
public:
Analyser (float sample_rate, unsigned int channels, samplecnt_t bufsize, samplecnt_t n_samples);
~Analyser ();
void process (ProcessContext<float> const & c);
ARDOUR::ExportAnalysisPtr result ();
void set_normalization_gain (float gain) {
_result.normalized = true;
_result.norm_gain_factor = gain;
}
static const float fft_range_db;
using Sink<float>::process;
private:
float fft_power_at_bin (const uint32_t b, const float norm) const;
ARDOUR::ExportAnalysis _result;
samplecnt_t _n_samples;
samplecnt_t _pos;
samplecnt_t _spp;
samplecnt_t _fpp;
float* _hann_window;
uint32_t _fft_data_size;
double _fft_freq_per_bin;
float* _fft_data_in;
float* _fft_data_out;
float* _fft_power;
fftwf_plan _fft_plan;
};
} // namespace
#endif
|
