summaryrefslogtreecommitdiff
path: root/src/instrument.cc
blob: 463f10d713a42eefa60125af4b58066537ce3665 (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
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
 *            instrument.cc
 *
 *  Tue Jul 22 17:14:20 CEST 2008
 *  Copyright 2008 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 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 General Public License for more details.
 *
 *  You should have received a copy of the GNU 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 "instrument.h"

#include <stdlib.h>
#include <stdio.h>

#include <hugin.hpp>

#include "sample.h"
#include "configuration.h"

Instrument::Instrument()
{
  DEBUG(instrument, "new %p\n", this);
  mod = 1.0;
  lastpos = 0;

  magic = this;
}

Instrument::~Instrument()
{
  magic = NULL;

  DEBUG(instrument, "delete %p\n", this);
  std::vector<AudioFile*>::iterator i = audiofiles.begin();
  while(i != audiofiles.end()) {
    delete *i;
    i++;
  }
}

bool Instrument::isValid()
{
  return this == magic;
}

Sample *Instrument::sample(level_t level, size_t pos)
{
  Sample *sample = NULL;

  if(Conf::enable_velocity_modifier == false) {
    mod = 1.0;
    lastpos = 0;
  }

  if(Conf::enable_velocity_randomiser) {
    float r = (float)rand() / (float)RAND_MAX; // random number: [0;1]
    r -= 0.5; // random number [-0.5;0.5]
    r *= Conf::velocity_randomiser_weight * 2; // ex. random number [-0.1;0.1]
    level += r;
    if(level > 1.0) level = 1.0;
    if(level < 0.0) level = 0.0;
  }

  if(Conf::enable_velocity_modifier) {
    mod += (pos - lastpos) /
      (Conf::samplerate * Conf::velocity_modifier_falloff);
    if(mod > 1.0) mod = 1.0;
  }

  if(version >= VersionStr("2.0")) {
    // Version 2.0
    sample = powerlist.get(level * mod);
  } else {
    // Version 1.0
    std::vector<Sample*> s = samples.get(level * mod);
    if(s.size() == 0) return NULL;
    size_t idx = rand()%(s.size());
    sample = s[idx];
  }

  if(Conf::enable_velocity_modifier) {
    lastpos = pos;
    mod *= Conf::velocity_modifier_weight;
  }

  return sample;
}

void Instrument::addSample(level_t a, level_t b, Sample *s)
{
  samples.insert(a, b, s);
}

void Instrument::finalise()
{
  if(version >= VersionStr("2.0")) {
    std::vector<Sample*>::iterator s = samplelist.begin();
    while(s != samplelist.end()) {
      powerlist.add(*s);
      s++;
    }

    powerlist.finalise();
  }
}

std::string Instrument::name()
{
  return _name;
}

std::string Instrument::description()
{
  return _description;
}

std::string Instrument::group()
{
  return _group;
}

void Instrument::setGroup(std::string g)
{
  _group = g;
}

#ifdef TEST_INSTRUMENT
//deps: channel.cc sample.cc audiofile.cc
//cflags: $(SNDFILE_CFLAGS)
//libs: $(SNDFILE_LIBS)
#include "test.h"

TEST_BEGIN;

Instrument i("test");

Sample *a = new Sample();
i.addSample(0.0, 1.0, a);

Sample *b = new Sample();
i.addSample(0.0, 1.0, b);

Sample *c = new Sample();
i.addSample(1.5, 1.7, c);

TEST_EQUAL(i.sample(0.0), b, "?");
TEST_EQUAL(i.sample(0.0), a, "?");
TEST_EQUAL(i.sample(0.0), b, "?");
TEST_EQUAL(i.sample(0.0), b, "?");
TEST_EQUAL(i.sample(0.0), b, "?");
TEST_EQUAL(i.sample(0.0), b, "?");
TEST_EQUAL(i.sample(0.0), a, "?");
TEST_EQUAL(i.sample(0.0), a, "?");

TEST_EQUAL(i.sample(2.0), NULL, "?");

TEST_EQUAL(i.sample(1.6), c, "?");
TEST_EQUAL(i.sample(1.6), c, "?");
TEST_EQUAL(i.sample(1.6), c, "?");

TEST_END;

#endif/*TEST_INSTRUMENT*/