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/*
* XMMS Crossfade Plugin
* Copyright (C) 2000-2004 Peter Eisenlohr <peter@eisenlohr.org>
*
* based on the original OSS Output Plugin
* Copyright (C) 1998-2000 Peter Alm, Mikael Alm, Olle Hallnas, Thomas Nilsson and 4Front Technologies
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <string.h>
#include "format.h"
gboolean
setup_format(AFormat fmt, gint rate, gint nch, format_t *format)
{
format->bps = 0;
format->fmt = fmt;
format->is_8bit = FALSE;
format->is_swapped = FALSE;
format->is_unsigned = FALSE;
/* check format */
switch(fmt) {
case FMT_U8:
format->is_8bit = TRUE;
format->is_unsigned = TRUE;
break;
case FMT_S8:
format->is_8bit = TRUE;
break;
case FMT_U16_LE:
format->is_unsigned = TRUE;
#ifdef WORDS_BIGENDIAN
format->is_swapped = TRUE;
#endif
break;
case FMT_U16_BE:
format->is_unsigned = TRUE;
#ifndef WORDS_BIGENDIAN
format->is_swapped = TRUE;
#endif
break;
case FMT_U16_NE:
format->is_unsigned = TRUE;
break;
case FMT_S16_LE:
#ifdef WORDS_BIGENDIAN
format->is_swapped = TRUE;
#endif
break;
case FMT_S16_BE:
#ifndef WORDS_BIGENDIAN
format->is_swapped = TRUE;
#endif
break;
case FMT_S16_NE:
break;
default:
DEBUG(("[crossfade] setup_format: unknown format (%d)!\n", fmt));
return -1;
}
/* check rate */
if((rate < 1) || (rate > 65535)) {
DEBUG(("[crossfade] setup_format: illegal rate (%d)!\n", rate));
return -1;
}
format->rate = rate;
/* check channels */
switch(nch) {
case 1:
case 2:
format->nch = nch;
break;
default:
DEBUG(("[crossfade] setup_format: illegal # of channels (%d)!\n", nch));
return -1;
}
/* calculate bps */
format->bps = rate * nch;
if(!format->is_8bit) format->bps *= 2;
return 0;
}
gboolean format_match(AFormat fmt1, AFormat fmt2)
{
if(fmt1 == fmt2) return TRUE; /* exact match */
if((fmt2 == FMT_U16_NE) || (fmt2 == FMT_S16_NE)) {
AFormat fmt = fmt1;
fmt1 = fmt2;
fmt2 = fmt;
}
#ifdef WORDS_BIGENDIAN
if(((fmt1 == FMT_U16_NE) && (fmt2 == FMT_U16_BE))
|| ((fmt1 == FMT_S16_NE) && (fmt2 == FMT_S16_BE))) return TRUE;
#else
if(((fmt1 == FMT_U16_NE) && (fmt2 == FMT_U16_LE))
|| ((fmt1 == FMT_S16_NE) && (fmt2 == FMT_S16_LE))) return TRUE;
#endif
return FALSE; /* no match */
}
gchar *format_name(AFormat fmt)
{
switch(fmt) {
case FMT_U8: return "FMT_U8";
case FMT_S8: return "FMT_S8";
case FMT_U16_LE: return "FMT_U16_LE";
case FMT_U16_BE: return "FMT_U16_BE";
case FMT_U16_NE: return "FMT_U16_NE";
case FMT_S16_LE: return "FMT_S16_LE";
case FMT_S16_BE: return "FMT_S16_BE";
case FMT_S16_NE: return "FMT_S16_NE";
}
return "UNKNOWN";
}
void format_copy(format_t *dest, format_t *src)
{
memcpy(dest, src, sizeof(format_t));
}
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