ref: e9e2e37c329dbe98bfeb27a1828ef9a71fa84f88
dir: /src/speech/cst_wave.c/
/*************************************************************************/
/* */
/* Language Technologies Institute */
/* Carnegie Mellon University */
/* Copyright (c) 2000 */
/* All Rights Reserved. */
/* */
/* Permission is hereby granted, free of charge, to use and distribute */
/* this software and its documentation without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of this work, and to */
/* permit persons to whom this work is furnished to do so, subject to */
/* the following conditions: */
/* 1. The code must retain the above copyright notice, this list of */
/* conditions and the following disclaimer. */
/* 2. Any modifications must be clearly marked as such. */
/* 3. Original authors' names are not deleted. */
/* 4. The authors' names are not used to endorse or promote products */
/* derived from this software without specific prior written */
/* permission. */
/* */
/* CARNEGIE MELLON UNIVERSITY AND THE CONTRIBUTORS TO THIS WORK */
/* DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING */
/* ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT */
/* SHALL CARNEGIE MELLON UNIVERSITY NOR THE CONTRIBUTORS BE LIABLE */
/* FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES */
/* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN */
/* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, */
/* ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF */
/* THIS SOFTWARE. */
/* */
/*************************************************************************/
/* Author: Alan W Black (awb@cs.cmu.edu) */
/* Date: August 2000 */
/*************************************************************************/
/* */
/* Waveforms */
/* */
/*************************************************************************/
#include "cst_string.h"
#include "cst_val.h"
#include "cst_wave.h"
CST_VAL_REGISTER_TYPE(wave,cst_wave)
cst_wave *new_wave()
{
cst_wave *w = cst_alloc(struct cst_wave_struct,1);
w->type = NULL;
w->num_samples = 0;
w->samples = NULL;
return w;
}
void delete_wave(cst_wave *w)
{
if (w)
{
cst_free(w->samples);
cst_free(w);
}
return;
}
void cst_wave_resize(cst_wave *w,int samples, int num_channels)
{
short *ns;
if (!w)
{
cst_errmsg("cst_wave_resize: null wave given to resize\n");
cst_error();
}
ns = cst_alloc(short,samples*num_channels);
if (num_channels == w->num_channels)
memmove(ns,w->samples,
sizeof(short) *
num_channels *
(samples < w->num_samples ? samples : w->num_samples));
cst_free(w->samples);
w->samples = ns;
w->num_samples = samples;
w->num_channels = num_channels;
}
void cst_wave_rescale(cst_wave *w, int factor)
{
int i;
for (i = 0; i < w->num_samples; ++i)
w->samples[i] = ((int)w->samples[i] * factor) / 65536;
}
cst_wave *copy_wave(const cst_wave *w)
{
cst_wave *n = new_wave();
cst_wave_resize(n,w->num_samples,w->num_channels);
n->sample_rate = w->sample_rate;
n->num_channels = w->num_channels;
n->type = w->type;
memcpy(n->samples,w->samples,sizeof(short)*w->num_samples*w->num_channels);
return n;
}
cst_wave *concat_wave(cst_wave *dest, const cst_wave *src)
{
int orig_nsamps;
if (dest->num_channels != src->num_channels)
{
cst_errmsg("concat_wave: channel count mismatch (%d != %d)\n",
dest->num_channels, src->num_channels);
cst_error();
}
if (dest->sample_rate != src->sample_rate)
{
cst_errmsg("concat_wave: sample rate mismatch (%d != %d)\n",
dest->sample_rate, src->sample_rate);
cst_error();
}
orig_nsamps = dest->num_samples * dest->num_channels;
cst_wave_resize(dest, dest->num_samples + src->num_samples,
dest->num_channels);
memcpy(dest->samples + orig_nsamps, src->samples,
src->num_samples * src->num_channels * sizeof(short));
return dest;
}