summaryrefslogtreecommitdiff
path: root/test/resampler.cc
blob: 6df8b51f41868613dd9665fa51bc0feced4a1505 (plain)
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
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
 *            resampler.cc
 *
 *  Sun Oct  5 20:16:22 CEST 2014
 *  Copyright 2014 Bent Bisballe Nyeng
 *  deva@aasimon.org
 ****************************************************************************/

/*
 *  This file is part of DrumGizmo.
 *
 *  DrumGizmo is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU Lesser General Public License as published by
 *  the Free Software Foundation; either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  DrumGizmo 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 Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public License
 *  along with DrumGizmo; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
 */
#include "dgunit.h"

#include "../src/chresampler.h"

#define BUFSZ 500

static float roundoff(float a) { return a<0.5?0:1; }

class test_resampler
	: public DGUnit
{
public:
	test_resampler()
	{
		DGUNIT_TEST(test_resampler::resampling);
		DGUNIT_TEST(test_resampler::resampling_buffer_sizes);
	}

	void resampling()
	{
		CHResampler r;
		DGUNIT_ASSERT_EQUAL(1.0, r.getRatio());

		r.setup(44100.0, 48000.0);
		DGUNIT_ASSERT_EQUAL(44100.0/48000.0, r.getRatio());

		float in[BUFSZ];
		for(int i = 0; i < BUFSZ; i++) in[i] = 0;//(float)i/(float)BUFSZ;
		in[100] = 1.0;

		float out[BUFSZ];
		r.setInputSamples(in, sizeof(in) / sizeof(float));
		r.setOutputSamples(out, sizeof(out) / sizeof(float));
		r.process();
		DGUNIT_ASSERT_EQUAL((size_t)0, r.getInputSampleCount());

		//    DGUNIT_ASSERT_EQUAL(, r.getOutputSampleCount());

		int outidx = -1;
		int inidx = -1;
		for(int i = 0; i < BUFSZ - (int)r.getOutputSampleCount(); i++) {
			if(in[i] == 1.0) inidx = i;
			if(roundoff(out[i]) == 1.0) outidx = i;
			//printf("in[% 4d]\t= %f\t", i, in[i]);
			//printf("out[% 4d]\t= %f\n", i, out[i]);
		}

		DGUNIT_ASSERT(inidx != -1);
		DGUNIT_ASSERT(outidx != -1);

		//printf("inidx: %d - outidx: %d\n", inidx, outidx);
		//DGUNIT_ASSERT_EQUAL(71, inidx - outidx); // This does not make sense...
	}

	void resampling_buffer_sizes()
	{
		CHResampler r;
		DGUNIT_ASSERT_EQUAL(1.0, r.getRatio());

		double infs = 24000;
		double outfs = 48000;
		r.setup(infs, outfs);
		DGUNIT_ASSERT_EQUAL(infs / outfs, r.getRatio());

		float in[BUFSZ];
		float out[(int)(BUFSZ / r.getRatio())];

		// Preload resampler
		r.setOutputSamples(out, 1);
		while(r.getOutputSampleCount()) {
			r.setInputSamples(in, 1);
			r.process();
		}

		r.setInputSamples(in, sizeof(in) / sizeof(float));
		r.setOutputSamples(out, sizeof(out) / sizeof(float));
		r.process();
		DGUNIT_ASSERT_EQUAL((size_t)0, r.getInputSampleCount());
		DGUNIT_ASSERT_EQUAL((size_t)0, r.getOutputSampleCount());
	}
};

// Registers the fixture into the 'registry'
static test_resampler test;