2 Copyright (C) 2003-2013 Paul Brossier <piem@aubio.org>
4 This file is part of aubio.
6 aubio is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 aubio is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with aubio. If not, see <http://www.gnu.org/licenses/>.
23 #include "aubio_priv.h"
26 #include "utils/parameter.h"
27 #include "synth/wavetable.h"
29 #define WAVETABLE_LEN 4096
31 struct _aubio_wavetable_t {
34 uint_t wavetable_length;
39 aubio_parameter_t *freq;
40 aubio_parameter_t *amp;
43 aubio_wavetable_t *new_aubio_wavetable(uint_t samplerate, uint_t blocksize)
46 aubio_wavetable_t *s = AUBIO_NEW(aubio_wavetable_t);
47 if ((sint_t)samplerate <= 0) {
48 AUBIO_ERR("Can not create wavetable with samplerate %d\n", samplerate);
51 s->samplerate = samplerate;
52 s->blocksize = blocksize;
53 s->wavetable_length = WAVETABLE_LEN;
54 s->wavetable = new_fvec(s->wavetable_length + 3);
55 for (i = 0; i < s->wavetable_length; i++) {
56 s->wavetable->data[i] = SIN(TWO_PI * i / (smpl_t) s->wavetable_length );
58 s->wavetable->data[s->wavetable_length] = s->wavetable->data[0];
59 s->wavetable->data[s->wavetable_length + 1] = s->wavetable->data[1];
60 s->wavetable->data[s->wavetable_length + 2] = s->wavetable->data[2];
63 s->freq = new_aubio_parameter( 0., s->samplerate / 2., 10 );
64 s->amp = new_aubio_parameter( 0., 1., 100 );
71 static smpl_t interp_2(const fvec_t *input, smpl_t pos) {
72 uint_t idx = (uint_t)FLOOR(pos);
73 smpl_t frac = pos - (smpl_t)idx;
74 smpl_t a = input->data[idx];
75 smpl_t b = input->data[idx + 1];
76 return a + frac * ( b - a );
79 void aubio_wavetable_do ( aubio_wavetable_t * s, const fvec_t * input, fvec_t * output)
83 smpl_t pos = s->last_pos;
84 for (i = 0; i < output->length; i++) {
85 smpl_t inc = aubio_parameter_get_next_value( s->freq );
86 inc *= (smpl_t)(s->wavetable_length) / (smpl_t) (s->samplerate);
88 while (pos > s->wavetable_length) {
89 pos -= s->wavetable_length;
91 output->data[i] = aubio_parameter_get_next_value ( s->amp );
92 output->data[i] *= interp_2(s->wavetable, pos);
96 for (i = 0; i < output->length; i++) {
97 aubio_parameter_get_next_value ( s->freq );
98 aubio_parameter_get_next_value ( s->amp );
102 // add input to output if needed
103 if (input && input != output) {
104 for (i = 0; i < output->length; i++) {
105 output->data[i] += input->data[i];
110 void aubio_wavetable_do_multi ( aubio_wavetable_t * s, const fmat_t * input, fmat_t * output)
114 smpl_t pos = s->last_pos;
115 for (j = 0; j < output->length; j++) {
116 smpl_t inc = aubio_parameter_get_next_value( s->freq );
117 smpl_t amp = aubio_parameter_get_next_value ( s->amp );
118 inc *= (smpl_t)(s->wavetable_length) / (smpl_t) (s->samplerate);
120 while (pos > s->wavetable_length) {
121 pos -= s->wavetable_length;
123 for (i = 0; i < output->height; i++) {
124 output->data[i][j] = amp * interp_2(s->wavetable, pos);
129 for (j = 0; j < output->length; j++) {
130 aubio_parameter_get_next_value ( s->freq );
131 aubio_parameter_get_next_value ( s->amp );
135 // add output to input if needed
136 if (input && input != output) {
137 for (i = 0; i < output->height; i++) {
138 for (j = 0; j < output->length; j++) {
139 output->data[i][j] += input->data[i][j];
145 uint_t aubio_wavetable_get_playing ( const aubio_wavetable_t * s )
150 uint_t aubio_wavetable_set_playing ( aubio_wavetable_t * s, uint_t playing )
152 s->playing = (playing == 1) ? 1 : 0;
156 uint_t aubio_wavetable_play ( aubio_wavetable_t * s )
158 aubio_wavetable_set_amp (s, 0.7);
159 return aubio_wavetable_set_playing (s, 1);
162 uint_t aubio_wavetable_stop ( aubio_wavetable_t * s )
164 //aubio_wavetable_set_freq (s, 0.);
165 aubio_wavetable_set_amp (s, 0.);
167 return aubio_wavetable_set_playing (s, 1);
170 uint_t aubio_wavetable_set_freq ( aubio_wavetable_t * s, smpl_t freq )
172 return aubio_parameter_set_target_value ( s->freq, freq );
175 smpl_t aubio_wavetable_get_freq ( const aubio_wavetable_t * s) {
176 return aubio_parameter_get_current_value ( s->freq);
179 uint_t aubio_wavetable_set_amp ( aubio_wavetable_t * s, smpl_t amp )
181 return aubio_parameter_set_target_value ( s->amp, amp );
184 smpl_t aubio_wavetable_get_amp ( const aubio_wavetable_t * s) {
185 return aubio_parameter_get_current_value ( s->amp );
188 void del_aubio_wavetable( aubio_wavetable_t * s )
190 del_aubio_parameter(s->freq);
191 del_aubio_parameter(s->amp);
192 del_fvec(s->wavetable);