mirror of
https://github.com/id-Software/DOOM-3-BFG.git
synced 2024-11-21 20:01:13 +00:00
138 lines
2.9 KiB
C++
138 lines
2.9 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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#include "config.h"
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#include "output.h"
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#include "tables.h"
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#ifdef SDL
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extern PlayMode sdl_play_mode;
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#define DEFAULT_PLAY_MODE &sdl_play_mode
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#endif
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PlayMode *play_mode_list[] = {
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#ifdef DEFAULT_PLAY_MODE
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DEFAULT_PLAY_MODE,
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#endif
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0
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};
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#ifdef DEFAULT_PLAY_MODE
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PlayMode *play_mode=DEFAULT_PLAY_MODE;
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#endif
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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, int32_t *lp, int32_t c)
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{
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int8_t *cp=(int8_t *)(dp);
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int32_t 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++ = (int8_t) (l);
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}
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}
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void s32tou8(void *dp, int32_t *lp, int32_t c)
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{
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uint8_t *cp=(uint8_t *)(dp);
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int32_t 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_t) l);
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}
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}
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void s32tos16(void *dp, int32_t *lp, int32_t c)
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{
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int16_t *sp=(int16_t *)(dp);
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int32_t 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++ = (int16_t)(l);
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}
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}
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void s32tou16(void *dp, int32_t *lp, int32_t c)
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{
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uint16_t *sp=(uint16_t *)(dp);
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int32_t 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_t)(l);
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}
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}
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void s32tos16x(void *dp, int32_t *lp, int32_t c)
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{
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int16_t *sp=(int16_t *)(dp);
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int32_t 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((int16_t)(l));
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}
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}
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void s32tou16x(void *dp, int32_t *lp, int32_t c)
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{
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uint16_t *sp=(uint16_t *)(dp);
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int32_t 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_t)(l));
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}
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}
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void s32toulaw(void *dp, int32_t *lp, int32_t c)
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{
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uint8_t *up=(uint8_t *)(dp);
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int32_t l;
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while (c--)
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{
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l=(*lp++)>>(32-13-GUARD_BITS);
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if (l > 4095) l=4095;
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else if (l<-4096) l=-4096;
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*up++ = _l2u[l];
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}
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}
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