2 Copyright (C) 2003 Paul Brossier
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
29 Real and complex buffers
31 This file specifies fvec_t and cvec_t buffers types, which are used
32 throughout aubio to store real and complex data. Complex values are stored in
33 terms of phase and norm.
37 /** Sample buffer type */
38 typedef struct _fvec_t fvec_t;
39 /** Spectrum buffer type */
40 typedef struct _cvec_t cvec_t;
41 /** Buffer for real values */
43 uint_t length; /**< length of buffer */
44 uint_t channels; /**< number of channels */
45 smpl_t **data; /**< data array of size [length] * [channels] */
47 /** Buffer for complex data */
49 uint_t length; /**< length of buffer = (requested length)/2 + 1 */
50 uint_t channels; /**< number of channels */
51 smpl_t **norm; /**< norm array of size [length] * [channels] */
52 smpl_t **phas; /**< phase array of size [length] * [channels] */
54 /** fvec_t buffer creation function
56 \param length the length of the buffer to create
57 \param channels the number of channels in the buffer
60 fvec_t * new_fvec(uint_t length, uint_t channels);
61 /** fvec_t buffer deletion function
63 \param s buffer to delete as returned by new_fvec()
66 void del_fvec(fvec_t *s);
67 /** read sample value in a buffer
69 Note that this function is not used in the aubio library, since the same
70 result can be obtained using vec->data[channel][position]. Its purpose is to
71 access these values from wrappers, as created by swig.
73 \param s vector to read from
74 \param channel channel to read from
75 \param position sample position to read from
78 smpl_t fvec_read_sample(fvec_t *s, uint_t channel, uint_t position);
79 /** write sample value in a buffer
81 Note that this function is not used in the aubio library, since the same
82 result can be obtained by assigning vec->data[channel][position]. Its purpose
83 is to access these values from wrappers, as created by swig.
85 \param s vector to write to
86 \param data value to write in s->data[channel][position]
87 \param channel channel to write to
88 \param position sample position to write to
91 void fvec_write_sample(fvec_t *s, smpl_t data, uint_t channel, uint_t position);
92 /** read channel vector from a buffer
94 Note that this function is not used in the aubio library, since the same
95 result can be obtained with vec->data[channel]. Its purpose is to access
96 these values from wrappers, as created by swig.
98 \param s vector to read from
99 \param channel channel to read from
102 smpl_t * fvec_get_channel(fvec_t *s, uint_t channel);
103 /** write channel vector into a buffer
105 Note that this function is not used in the aubio library, since the same
106 result can be obtained by assigning vec->data[channel]. Its purpose is to
107 access these values from wrappers, as created by swig.
109 \param s vector to write to
110 \param data vector of [length] values to write
111 \param channel channel to write to
114 void fvec_put_channel(fvec_t *s, smpl_t * data, uint_t channel);
115 /** read data from a buffer
117 Note that this function is not used in the aubio library, since the same
118 result can be obtained with vec->data. Its purpose is to access these values
119 from wrappers, as created by swig.
121 \param s vector to read from
124 smpl_t ** fvec_get_data(fvec_t *s);
126 /** cvec_t buffer creation function
128 This function creates a cvec_t structure holding two arrays of size
129 [length/2+1] * channels, corresponding to the norm and phase values of the
130 spectral frame. The length stored in the structure is the actual size of both
131 arrays, not the length of the complex and symetrical vector, specified as
134 \param length the length of the buffer to create
135 \param channels the number of channels in the buffer
138 cvec_t * new_cvec(uint_t length, uint_t channels);
139 /** cvec_t buffer deletion function
141 \param s buffer to delete as returned by new_cvec()
144 void del_cvec(cvec_t *s);
145 /** write norm value in a complex buffer
147 Note that this function is not used in the aubio library, since the same
148 result can be obtained by assigning vec->norm[channel][position]. Its purpose
149 is to access these values from wrappers, as created by swig.
151 \param s vector to write to
152 \param data norm value to write in s->norm[channel][position]
153 \param channel channel to write to
154 \param position sample position to write to
157 void cvec_write_norm(cvec_t *s, smpl_t data, uint_t channel, uint_t position);
158 /** write phase value in a complex buffer
160 Note that this function is not used in the aubio library, since the same
161 result can be obtained by assigning vec->phas[channel][position]. Its purpose
162 is to access these values from wrappers, as created by swig.
164 \param s vector to write to
165 \param data phase value to write in s->phas[channel][position]
166 \param channel channel to write to
167 \param position sample position to write to
170 void cvec_write_phas(cvec_t *s, smpl_t data, uint_t channel, uint_t position);
171 /** read norm value from a complex buffer
173 Note that this function is not used in the aubio library, since the same
174 result can be obtained with vec->norm[channel][position]. Its purpose is to
175 access these values from wrappers, as created by swig.
177 \param s vector to read from
178 \param channel channel to read from
179 \param position sample position to read from
182 smpl_t cvec_read_norm(cvec_t *s, uint_t channel, uint_t position);
183 /** read phase value from a complex buffer
185 Note that this function is not used in the aubio library, since the same
186 result can be obtained with vec->phas[channel][position]. Its purpose is to
187 access these values from wrappers, as created by swig.
189 \param s vector to read from
190 \param channel channel to read from
191 \param position sample position to read from
194 smpl_t cvec_read_phas(cvec_t *s, uint_t channel, uint_t position);
195 /** write norm channel in a complex buffer
197 Note that this function is not used in the aubio library, since the same
198 result can be obtained by assigning vec->norm[channel]. Its purpose is to
199 access these values from wrappers, as created by swig.
201 \param s vector to write to
202 \param data norm vector of [length] samples to write in s->norm[channel]
203 \param channel channel to write to
206 void cvec_put_norm_channel(cvec_t *s, smpl_t * data, uint_t channel);
207 /** write phase channel in a complex buffer
209 Note that this function is not used in the aubio library, since the same
210 result can be obtained by assigning vec->phas[channel]. Its purpose is to
211 access these values from wrappers, as created by swig.
213 \param s vector to write to
214 \param data phase vector of [length] samples to write in s->phas[channel]
215 \param channel channel to write to
218 void cvec_put_phas_channel(cvec_t *s, smpl_t * data, uint_t channel);
219 /** read norm channel from a complex buffer
221 Note that this function is not used in the aubio library, since the same
222 result can be obtained with vec->norm[channel]. Its purpose is to access
223 these values from wrappers, as created by swig.
225 \param s vector to read from
226 \param channel channel to read from
229 smpl_t * cvec_get_norm_channel(cvec_t *s, uint_t channel);
230 /** write phase channel in a complex buffer
232 Note that this function is not used in the aubio library, since the same
233 result can be obtained with vec->phas[channel]. Its purpose is to access
234 these values from wrappers, as created by swig.
236 \param s vector to read from
237 \param channel channel to read from
240 smpl_t * cvec_get_phas_channel(cvec_t *s, uint_t channel);
241 /** read norm data from a complex buffer
243 Note that this function is not used in the aubio library, since the same
244 result can be obtained with vec->norm. Its purpose is to access these values
245 from wrappers, as created by swig.
247 \param s vector to read from
250 smpl_t ** cvec_get_norm(cvec_t *s);
251 /** read phase data from a complex buffer
253 Note that this function is not used in the aubio library, since the same
254 result can be obtained with vec->phas. Its purpose is to access these values
255 from wrappers, as created by swig.
257 \param s vector to read from
260 smpl_t ** cvec_get_phas(cvec_t *s);
266 #endif /* _SAMPLE_H */