159 lines
6.7 KiB
C
159 lines
6.7 KiB
C
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/*************************************************************************/
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/* */
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/* Language Technologies Institute */
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/* Carnegie Mellon University */
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/* Copyright (c) 1999 */
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/* All Rights Reserved. */
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/* */
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/* Permission is hereby granted, free of charge, to use and distribute */
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/* this software and its documentation without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of this work, and to */
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/* permit persons to whom this work is furnished to do so, subject to */
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/* the following conditions: */
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/* 1. The code must retain the above copyright notice, this list of */
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/* conditions and the following disclaimer. */
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/* 2. Any modifications must be clearly marked as such. */
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/* 3. Original authors' names are not deleted. */
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/* 4. The authors' names are not used to endorse or promote products */
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/* derived from this software without specific prior written */
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/* permission. */
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/* */
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/* CARNEGIE MELLON UNIVERSITY AND THE CONTRIBUTORS TO THIS WORK */
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/* DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING */
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/* ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT */
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/* SHALL CARNEGIE MELLON UNIVERSITY NOR THE CONTRIBUTORS BE LIABLE */
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/* FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES */
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/* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN */
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/* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, */
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/* ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF */
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/* THIS SOFTWARE. */
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/* */
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/*************************************************************************/
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/* Author: Alan W Black (awb@cs.cmu.edu) */
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/* Date: August 2000 */
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/*************************************************************************/
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/* */
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/* Waveforms */
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/* */
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/*************************************************************************/
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#ifndef _CST_WAVE_H__
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#define _CST_WAVE_H__
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#include "cst_file.h"
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#include "cst_error.h"
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#include "cst_alloc.h"
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#include "cst_endian.h"
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#include "cst_file.h"
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#include "cst_val.h"
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typedef struct cst_wave_struct {
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const char *type;
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int sample_rate;
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int num_samples;
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int num_channels;
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short *samples;
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} cst_wave;
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typedef struct cst_wave_header_struct {
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const char *type;
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int hsize;
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int num_bytes;
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int sample_rate;
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int num_samples;
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int num_channels;
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} cst_wave_header;
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cst_wave *new_wave();
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cst_wave *copy_wave(const cst_wave *w);
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void delete_wave(cst_wave *val);
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cst_wave *concat_wave(cst_wave *dest, const cst_wave *src);
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#define cst_wave_num_samples(w) (w?w->num_samples:0)
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#define cst_wave_num_channels(w) (w?w->num_channels:0)
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#define cst_wave_sample_rate(w) (w?w->sample_rate:0)
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#define cst_wave_samples(w) (w->samples)
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#define cst_wave_set_num_samples(w,s) w->num_samples=s
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#define cst_wave_set_num_channels(w,s) w->num_channels=s
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#define cst_wave_set_sample_rate(w,s) w->sample_rate=s
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int cst_wave_save(cst_wave *w, const char *filename, const char *type);
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int cst_wave_save_riff(cst_wave *w, const char *filename);
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int cst_wave_save_raw(cst_wave *w, const char *filename);
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int cst_wave_append_riff(cst_wave *w,const char *filename);
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int cst_wave_save_riff_fd(cst_wave *w, cst_file fd);
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int cst_wave_save_raw_fd(cst_wave *w, cst_file fd);
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int cst_wave_load(cst_wave *w, const char *filename, const char *type);
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int cst_wave_load_riff(cst_wave *w, const char *filename);
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int cst_wave_load_raw(cst_wave *w, const char *filename,
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const char *bo, int sample_rate);
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int cst_wave_load_riff_header(cst_wave_header *header,cst_file fd);
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int cst_wave_load_riff_fd(cst_wave *w, cst_file fd);
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int cst_wave_load_raw_fd (cst_wave *w, cst_file fd,
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const char *bo, int sample_rate);
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void cst_wave_resize(cst_wave *w,int samples, int num_channels);
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void cst_wave_resample(cst_wave *w, int sample_rate);
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void cst_wave_rescale(cst_wave *w, int factor);
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/* Resampling code */
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typedef struct cst_rateconv_struct {
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int channels; /* what do you think? */
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int up, down; /* up/down sampling ratio */
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double gain; /* output gain */
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int lag; /* lag time (in samples) */
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int *sin, *sout, *coep; /* filter buffers, coefficients */
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/* n.b. outsize is the minimum buffer size for
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cst_rateconv_out() when streaming */
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int insize, outsize; /* size of filter buffers */
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int incount; /* amount of input data */
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int len; /* size of filter */
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/* internal foo coefficients */
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double fsin, fgk, fgg;
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/* internal counters */
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int inbaseidx, inoffset, cycctr, outidx;
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} cst_rateconv;
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cst_rateconv * new_rateconv(int up, int down, int channels);
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void delete_rateconv(cst_rateconv *filt);
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int cst_rateconv_in(cst_rateconv *filt, const short *inptr, int max);
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int cst_rateconv_leadout(cst_rateconv *filt);
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int cst_rateconv_out(cst_rateconv *filt, short *outptr, int max);
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/* File format cruft. */
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#define RIFF_FORMAT_PCM 0x0001
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#define RIFF_FORMAT_ADPCM 0x0002
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#define RIFF_FORMAT_MULAW 0x0006
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#define RIFF_FORMAT_ALAW 0x0007
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/* Sun/Next header, short and sweet, note its always BIG_ENDIAN though */
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typedef struct {
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unsigned int magic; /* magic number */
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unsigned int hdr_size; /* size of this header */
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int data_size; /* length of data (optional) */
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unsigned int encoding; /* data encoding format */
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unsigned int sample_rate; /* samples per second */
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unsigned int channels; /* number of interleaved channels */
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} snd_header;
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#define CST_SND_MAGIC (unsigned int)0x2e736e64
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#define CST_SND_ULAW 1
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#define CST_SND_UCHAR 2
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#define CST_SND_SHORT 3
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/* Convertion functions */
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unsigned char cst_short_to_ulaw(short sample);
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short cst_ulaw_to_short(unsigned char ulawbyte);
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CST_VAL_USER_TYPE_DCLS(wave,cst_wave)
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#endif
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