114 lines
2.6 KiB
C
114 lines
2.6 KiB
C
/*
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TiMidity -- Experimental MIDI to WAVE converter
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Copyright (C) 1995 Tuukka Toivonen <toivonen@clinet.fi>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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output.c
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Audio output (to file / device) functions.
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*/
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#if HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include "timidity.h"
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#include "timidity_internal.h"
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#include "options.h"
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#include "output.h"
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/*****************************************************************/
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/* Some functions to convert signed 32-bit data to other formats */
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void s32tos8(void *dp, sint32 *lp, sint32 c)
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{
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sint8 *cp=(sint8 *)(dp);
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sint32 l;
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while (c--)
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{
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l=(*lp++)>>(32-8-GUARD_BITS);
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if (l>127) l=127;
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else if (l<-128) l=-128;
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*cp++ = (sint8) (l);
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}
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}
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void s32tou8(void *dp, sint32 *lp, sint32 c)
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{
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uint8 *cp=(uint8 *)(dp);
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sint32 l;
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while (c--)
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{
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l=(*lp++)>>(32-8-GUARD_BITS);
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if (l>127) l=127;
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else if (l<-128) l=-128;
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*cp++ = 0x80 ^ ((uint8) l);
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}
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}
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void s32tos16(void *dp, sint32 *lp, sint32 c)
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{
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sint16 *sp=(sint16 *)(dp);
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sint32 l;
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while (c--)
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{
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l=(*lp++)>>(32-16-GUARD_BITS);
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if (l > 32767) l=32767;
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else if (l<-32768) l=-32768;
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*sp++ = (sint16)(l);
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}
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}
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void s32tou16(void *dp, sint32 *lp, sint32 c)
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{
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uint16 *sp=(uint16 *)(dp);
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sint32 l;
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while (c--)
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{
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l=(*lp++)>>(32-16-GUARD_BITS);
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if (l > 32767) l=32767;
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else if (l<-32768) l=-32768;
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*sp++ = 0x8000 ^ (uint16)(l);
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}
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}
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void s32tos16x(void *dp, sint32 *lp, sint32 c)
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{
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sint16 *sp=(sint16 *)(dp);
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sint32 l;
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while (c--)
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{
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l=(*lp++)>>(32-16-GUARD_BITS);
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if (l > 32767) l=32767;
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else if (l<-32768) l=-32768;
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*sp++ = XCHG_SHORT((sint16)(l));
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}
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}
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void s32tou16x(void *dp, sint32 *lp, sint32 c)
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{
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uint16 *sp=(uint16 *)(dp);
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sint32 l;
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while (c--)
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{
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l=(*lp++)>>(32-16-GUARD_BITS);
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if (l > 32767) l=32767;
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else if (l<-32768) l=-32768;
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*sp++ = XCHG_SHORT(0x8000 ^ (uint16)(l));
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}
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}
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