1 /*************************************************************************/
2 /* */
3 /* Language Technologies Institute */
4 /* Carnegie Mellon University */
5 /* Copyright (c) 2000 */
6 /* All Rights Reserved. */
7 /* */
8 /* Permission is hereby granted, free of charge, to use and distribute */
9 /* this software and its documentation without restriction, including */
10 /* without limitation the rights to use, copy, modify, merge, publish, */
11 /* distribute, sublicense, and/or sell copies of this work, and to */
12 /* permit persons to whom this work is furnished to do so, subject to */
13 /* the following conditions: */
14 /* 1. The code must retain the above copyright notice, this list of */
15 /* conditions and the following disclaimer. */
16 /* 2. Any modifications must be clearly marked as such. */
17 /* 3. Original authors' names are not deleted. */
18 /* 4. The authors' names are not used to endorse or promote products */
19 /* derived from this software without specific prior written */
20 /* permission. */
21 /* */
22 /* CARNEGIE MELLON UNIVERSITY AND THE CONTRIBUTORS TO THIS WORK */
23 /* DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING */
24 /* ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT */
25 /* SHALL CARNEGIE MELLON UNIVERSITY NOR THE CONTRIBUTORS BE LIABLE */
26 /* FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES */
27 /* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN */
28 /* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, */
29 /* ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF */
30 /* THIS SOFTWARE. */
31 /* */
32 /*************************************************************************/
33 /* Author: Alan W Black (awb@cs.cmu.edu) */
34 /* Date: August 2000 */
35 /*************************************************************************/
36 /* */
37 /* Waveforms */
38 /* */
39 /*************************************************************************/
40 #include "cst_string.h"
41 #include "cst_val.h"
42 #include "cst_wave.h"
43
CST_VAL_REGISTER_TYPE(wave,cst_wave)44 CST_VAL_REGISTER_TYPE(wave,cst_wave)
45
46 cst_wave *new_wave()
47 {
48 cst_wave *w = cst_alloc(struct cst_wave_struct,1);
49 w->type = NULL;
50 w->num_samples = 0;
51 w->samples = NULL;
52 return w;
53 }
54
delete_wave(cst_wave * w)55 void delete_wave(cst_wave *w)
56 {
57 if (w)
58 {
59 cst_free(w->samples);
60 cst_free(w);
61 }
62 return;
63 }
64
cst_wave_resize(cst_wave * w,int samples,int num_channels)65 void cst_wave_resize(cst_wave *w,int samples, int num_channels)
66 {
67 short *ns;
68
69 if (!w)
70 {
71 cst_errmsg("cst_wave_resize: null wave given to resize\n");
72 cst_error();
73 }
74 ns = cst_alloc(short,samples*num_channels);
75 if (num_channels == w->num_channels)
76 memmove(ns,w->samples,
77 sizeof(short) *
78 num_channels *
79 (samples < w->num_samples ? samples : w->num_samples));
80 cst_free(w->samples);
81 w->samples = ns;
82 w->num_samples = samples;
83 w->num_channels = num_channels;
84
85 }
86
cst_wave_rescale(cst_wave * w,int factor)87 void cst_wave_rescale(cst_wave *w, int factor)
88 {
89 int i;
90
91 for (i = 0; i < w->num_samples; ++i)
92 w->samples[i] = ((int)w->samples[i] * factor) / 65536;
93 }
94
copy_wave(const cst_wave * w)95 cst_wave *copy_wave(const cst_wave *w)
96 {
97 cst_wave *n = new_wave();
98
99 cst_wave_resize(n,w->num_samples,w->num_channels);
100 n->sample_rate = w->sample_rate;
101 n->num_channels = w->num_channels;
102 n->type = w->type;
103 memcpy(n->samples,w->samples,sizeof(short)*w->num_samples*w->num_channels);
104 return n;
105 }
106
concat_wave(cst_wave * dest,const cst_wave * src)107 cst_wave *concat_wave(cst_wave *dest, const cst_wave *src)
108 {
109 int orig_nsamps;
110
111 if (dest->num_channels != src->num_channels)
112 {
113 cst_errmsg("concat_wave: channel count mismatch (%d != %d)\n",
114 dest->num_channels, src->num_channels);
115 cst_error();
116 }
117 if (dest->sample_rate != src->sample_rate)
118 {
119 cst_errmsg("concat_wave: sample rate mismatch (%d != %d)\n",
120 dest->sample_rate, src->sample_rate);
121 cst_error();
122 }
123
124 orig_nsamps = dest->num_samples * dest->num_channels;
125 cst_wave_resize(dest, dest->num_samples + src->num_samples,
126 dest->num_channels);
127 memcpy(dest->samples + orig_nsamps, src->samples,
128 src->num_samples * src->num_channels * sizeof(short));
129
130 return dest;
131 }
132