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158 lines
6.7 KiB
158 lines
6.7 KiB
/*************************************************************************/ |
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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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