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/* $OpenBSD: aparams.c,v 1.1 2008/05/23 07:15:46 ratchov Exp $ */
/*
* Copyright (c) 2008 Alexandre Ratchov <alex@caoua.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, 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.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "aparams.h"
/*
* Initialise parameters structure with the defaults natively supported
* by the machine.
*/
void
aparams_init(struct aparams *par, unsigned cmin, unsigned cmax, unsigned rate)
{
par->bps = 2; /* 2 bytes per sample */
par->bits = 16; /* 16 significant bits per sample */
par->sig = 1; /* samples are signed */
par->le = NATIVE_LE;
par->msb = 1; /* msb justified */
par->cmin = cmin;
par->cmax = cmax;
par->rate = rate;
}
/*
* Print the format/channels/encoding on stderr.
*/
void
aparams_print(struct aparams *par)
{
fprintf(stderr, "%c", par->sig ? 's' : 'u');
fprintf(stderr, "%u", par->bits);
if (par->bps > 1)
fprintf(stderr, "%s", par->le ? "le" : "be");
if ((par->bits & (par->bits - 1)) != 0 || par->bits != 8 * par->bps) {
fprintf(stderr, "/%u", par->bps);
fprintf(stderr, "%s", par->msb ? "msb" : "lsb");
}
fprintf(stderr, ",%u:%u", par->cmin, par->cmax);
fprintf(stderr, ",%uHz", par->rate);
}
void
aparams_print2(struct aparams *par1, struct aparams *par2)
{
aparams_print(par1);
fprintf(stderr, " -> ");
aparams_print(par2);
}
/*
* Return true if both parameters are the same.
*/
int
aparams_eq(struct aparams *par1, struct aparams *par2)
{
if (par1->bps != par2->bps ||
par1->bits != par2->bits ||
par1->sig != par2->sig ||
par1->cmin != par2->cmin ||
par1->cmax != par2->cmax ||
par1->rate != par2->rate)
return 0;
if ((par1->bits != 8 * par1->bps) && par1->msb != par2->msb)
return 0;
if (par1->bps > 1 && par1->le != par2->le)
return 0;
return 1;
}
/*
* Return the number of bytes per frame with the given parameters.
*/
unsigned
aparams_bpf(struct aparams *par)
{
return (par->cmax - par->cmin + 1) * par->bps;
}
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