mirror of https://github.com/ericonr/sndio.git
65 lines
2.1 KiB
C
65 lines
2.1 KiB
C
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/* $OpenBSD$ */
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/*
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* Copyright (c) 2012 Alexandre Ratchov <alex@caoua.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifndef DSP_H
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#define DSP_H
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#include "aparams.h"
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struct resamp {
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void *data;
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#define RESAMP_NCTX 2
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unsigned int ctx_start;
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adata_t ctx[NCHAN_MAX * RESAMP_NCTX];
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unsigned int iblksz, oblksz;
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int diff;
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int idelta, odelta; /* remainder of ipos/opos */
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int nch;
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};
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struct conv {
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void *data;
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int bfirst; /* bytes to skip at startup */
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unsigned int bps; /* bytes per sample */
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unsigned int shift; /* shift to get 32bit MSB */
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int sigbit; /* sign bits to XOR */
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int bnext; /* to reach the next byte */
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int snext; /* to reach the next sample */
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int nch;
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};
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struct cmap {
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int istart;
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int inext;
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int onext;
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int ostart;
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int nch;
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};
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int resamp_do(struct resamp *, adata_t *, adata_t *, int);
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void resamp_init(struct resamp *, unsigned int, unsigned int, int);
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void enc_do(struct conv *, unsigned char *, unsigned char *, int);
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void enc_sil_do(struct conv *, unsigned char *, int);
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void enc_init(struct conv *, struct aparams *, int);
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void dec_do(struct conv *, unsigned char *, unsigned char *, int);
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void dec_init(struct conv *, struct aparams *, int);
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void cmap_add(struct cmap *, void *, void *, int, int);
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void cmap_copy(struct cmap *, void *, void *, int, int);
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void cmap_init(struct cmap *, int, int, int, int, int, int, int, int);
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int sqrtone(int, adata_t *, int, int, int);
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#endif /* !defined(DSP_H) */
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