ref: 25477859abb169a6041bca8e318c2b7039f5189d
dir: /include/cst_wave.h/
/*************************************************************************/
/* */
/* Language Technologies Institute */
/* Carnegie Mellon University */
/* Copyright (c) 1999 */
/* 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 */
/* */
/*************************************************************************/
#ifndef _CST_WAVE_H__
#define _CST_WAVE_H__
#include "cst_file.h"
#include "cst_error.h"
#include "cst_alloc.h"
#include "cst_endian.h"
#include "cst_file.h"
#include "cst_val.h"
typedef struct cst_wave_struct {
const char *type;
int sample_rate;
int num_samples;
int num_channels;
short *samples;
} cst_wave;
typedef struct cst_wave_header_struct {
const char *type;
int hsize;
int num_bytes;
int sample_rate;
int num_samples;
int num_channels;
} cst_wave_header;
cst_wave *new_wave();
cst_wave *copy_wave(const cst_wave *w);
void delete_wave(cst_wave *val);
cst_wave *concat_wave(cst_wave *dest, const cst_wave *src);
#define cst_wave_num_samples(w) (w?w->num_samples:0)
#define cst_wave_num_channels(w) (w?w->num_channels:0)
#define cst_wave_sample_rate(w) (w?w->sample_rate:0)
#define cst_wave_samples(w) (w->samples)
#define cst_wave_set_num_samples(w,s) w->num_samples=s
#define cst_wave_set_num_channels(w,s) w->num_channels=s
#define cst_wave_set_sample_rate(w,s) w->sample_rate=s
int cst_wave_save(cst_wave *w, const char *filename, const char *type);
int cst_wave_save_riff(cst_wave *w, const char *filename);
int cst_wave_save_raw(cst_wave *w, const char *filename);
int cst_wave_append_riff(cst_wave *w,const char *filename);
int cst_wave_save_riff_fd(cst_wave *w, cst_file fd);
int cst_wave_save_raw_fd(cst_wave *w, cst_file fd);
int cst_wave_load(cst_wave *w, const char *filename, const char *type);
int cst_wave_load_riff(cst_wave *w, const char *filename);
int cst_wave_load_raw(cst_wave *w, const char *filename,
const char *bo, int sample_rate);
int cst_wave_load_riff_header(cst_wave_header *header,cst_file fd);
int cst_wave_load_riff_fd(cst_wave *w, cst_file fd);
int cst_wave_load_raw_fd (cst_wave *w, cst_file fd,
const char *bo, int sample_rate);
void cst_wave_resize(cst_wave *w,int samples, int num_channels);
void cst_wave_resample(cst_wave *w, int sample_rate);
void cst_wave_rescale(cst_wave *w, int factor);
/* Resampling code */
typedef struct cst_rateconv_struct {
int channels; /* what do you think? */
int up, down; /* up/down sampling ratio */
double gain; /* output gain */
int lag; /* lag time (in samples) */
int *sin, *sout, *coep; /* filter buffers, coefficients */
/* n.b. outsize is the minimum buffer size for
cst_rateconv_out() when streaming */
int insize, outsize; /* size of filter buffers */
int incount; /* amount of input data */
int len; /* size of filter */
/* internal foo coefficients */
double fsin, fgk, fgg;
/* internal counters */
int inbaseidx, inoffset, cycctr, outidx;
} cst_rateconv;
cst_rateconv * new_rateconv(int up, int down, int channels);
void delete_rateconv(cst_rateconv *filt);
int cst_rateconv_in(cst_rateconv *filt, const short *inptr, int max);
int cst_rateconv_leadout(cst_rateconv *filt);
int cst_rateconv_out(cst_rateconv *filt, short *outptr, int max);
/* File format cruft. */
#define RIFF_FORMAT_PCM 0x0001
#define RIFF_FORMAT_ADPCM 0x0002
#define RIFF_FORMAT_MULAW 0x0006
#define RIFF_FORMAT_ALAW 0x0007
/* Sun/Next header, short and sweet, note its always BIG_ENDIAN though */
typedef struct {
unsigned int magic; /* magic number */
unsigned int hdr_size; /* size of this header */
int data_size; /* length of data (optional) */
unsigned int encoding; /* data encoding format */
unsigned int sample_rate; /* samples per second */
unsigned int channels; /* number of interleaved channels */
} snd_header;
#define CST_SND_MAGIC (unsigned int)0x2e736e64
#define CST_SND_ULAW 1
#define CST_SND_UCHAR 2
#define CST_SND_SHORT 3
/* Convertion functions */
unsigned char cst_short_to_ulaw(short sample);
short cst_ulaw_to_short(unsigned char ulawbyte);
#define CST_G721_LEADIN 8
unsigned char *cst_g721_decode(int *actual_size,int size,
const unsigned char *packed_residual);
unsigned char *cst_g721_encode(int *packed_size,int actual_size,
const unsigned char *unpacked_residual);
CST_VAL_USER_TYPE_DCLS(wave,cst_wave)
#endif