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- /*
-
- TiMidity -- Experimental MIDI to WAVE converter
- Copyright (C) 1995 Tuukka Toivonen <titoivon@snakemail.hut.fi>
-
- 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., 675 Mass Ave, Cambridge, MA 02139, USA.
-
- output.c
-
- Audio output (to file / device) functions.
- */
-
- #include "config.h"
- #include "output.h"
- #include "tables.h"
-
- #ifdef AU_LINUX
- extern PlayMode linux_play_mode;
- #define DEFAULT_PLAY_MODE &linux_play_mode
- #endif
-
- #ifdef AU_HPUX
- extern PlayMode hpux_play_mode;
- #define DEFAULT_PLAY_MODE &hpux_play_mode
- #endif
-
- #ifdef AU_SUN
- extern PlayMode sun_play_mode;
- #define DEFAULT_PLAY_MODE &sun_play_mode
- #endif
-
- #ifdef AU_WIN32
- extern PlayMode win32_play_mode;
- #define DEFAULT_PLAY_MODE &win32_play_mode
- #endif
-
- extern PlayMode raw_play_mode, wave_play_mode;
-
- PlayMode *play_mode_list[] = {
- #ifdef DEFAULT_PLAY_MODE
- DEFAULT_PLAY_MODE,
- #endif
- &wave_play_mode,
- &raw_play_mode,
- 0
- };
-
- #ifdef DEFAULT_PLAY_MODE
- PlayMode *play_mode=DEFAULT_PLAY_MODE;
- #else
- PlayMode *play_mode=&wave_play_mode;
- #endif
-
- /*****************************************************************/
- /* Some functions to convert signed 32-bit data to other formats */
-
- void s32tos8(int32 *lp, void *b, int32 c)
- {
- int8 *cp;
- int32 l;
-
- if (b)
- cp = b;
- else
- cp = (int8 *)(lp);
-
- while (c--)
- {
- l=(*lp++)>>(32-8-GUARD_BITS);
- if (l>127) l=127;
- else if (l<-128) l=-128;
- *cp++ = (int8) (l);
- }
- }
-
- void s32tou8(int32 *lp, void *b, int32 c)
- {
- uint8 *cp;
- int32 l;
-
- if (b)
- cp = b;
- else
- cp = (uint8 *)(lp);
-
- while (c--)
- {
- l=(*lp++)>>(32-8-GUARD_BITS);
- if (l>127) l=127;
- else if (l<-128) l=-128;
- *cp++ = 0x80 ^ ((uint8) l);
- }
- }
-
- void s32tos16(int32 *lp, void *b, int32 c)
- {
- int16 *sp;
- int32 l;
-
- if (b)
- sp = b;
- else
- sp = (int16 *)(lp);
-
- while (c--)
- {
- l=(*lp++)>>(32-16-GUARD_BITS);
- if (l > 32767) l=32767;
- else if (l<-32768) l=-32768;
- *sp++ = (int16)(l);
- }
- }
-
- void s32tou16(int32 *lp, void *b, int32 c)
- {
- uint16 *sp;
- int32 l;
-
- if (b)
- sp = b;
- else
- sp = (uint16 *)(lp);
-
- while (c--)
- {
- l=(*lp++)>>(32-16-GUARD_BITS);
- if (l > 32767) l=32767;
- else if (l<-32768) l=-32768;
- *sp++ = 0x8000 ^ (uint16)(l);
- }
- }
-
- void s32tos16x(int32 *lp, void *b, int32 c)
- {
- int16 *sp;
- int32 l;
-
- if (b)
- sp = b;
- else
- sp = (int16 *)(lp);
-
- while (c--)
- {
- l=(*lp++)>>(32-16-GUARD_BITS);
- if (l > 32767) l=32767;
- else if (l<-32768) l=-32768;
- *sp++ = XCHG_SHORT((int16)(l));
- }
- }
-
- void s32tou16x(int32 *lp, void *b, int32 c)
- {
- uint16 *sp;
- int32 l;
-
- if (b)
- sp = b;
- else
- sp = (uint16 *)(lp);
-
- while (c--)
- {
- l=(*lp++)>>(32-16-GUARD_BITS);
- if (l > 32767) l=32767;
- else if (l<-32768) l=-32768;
- *sp++ = XCHG_SHORT(0x8000 ^ (uint16)(l));
- }
- }
-
- void s32toulaw(int32 *lp, void *b, int32 c)
- {
- uint8 *up;
- int32 l;
-
- if (b)
- up = b;
- else
- up = (uint8 *)(lp);
-
- while (c--)
- {
- l=(*lp++)>>(32-13-GUARD_BITS);
- if (l > 4095) l=4095;
- else if (l<-4096) l=-4096;
- *up++ = _l2u[l];
- }
- }
-