output.h
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上传日期:2022-07-21
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- /*
- TiMidity -- Experimental MIDI to WAVE converter
- Copyright (C) 1995 Tuukka Toivonen <toivonen@clinet.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.h
- */
- /* Data format encoding bits */
- #define PE_MONO 0x01 /* versus stereo */
- #define PE_SIGNED 0x02 /* versus unsigned */
- #define PE_16BIT 0x04 /* versus 8-bit */
- #define PE_ULAW 0x08 /* versus linear */
- #define PE_BYTESWAP 0x10 /* versus the other way */
- typedef struct {
- int32 rate, encoding;
- char *id_name;
- } PlayMode;
- extern PlayMode *play_mode_list[], *play_mode;
- extern int init_buffers(int kbytes);
- /* Conversion functions -- These overwrite the int32 data in *lp with
- data in another format */
- /* The size of the output buffers */
- extern int AUDIO_BUFFER_SIZE;
- /* Actual copy function */
- extern void (*s32tobuf)(void *dp, int32 *lp, int32 c);
- /* 8-bit signed and unsigned*/
- extern void s32tos8(void *dp, int32 *lp, int32 c);
- extern void s32tou8(void *dp, int32 *lp, int32 c);
- /* 16-bit */
- extern void s32tos16(void *dp, int32 *lp, int32 c);
- extern void s32tou16(void *dp, int32 *lp, int32 c);
- /* byte-exchanged 16-bit */
- extern void s32tos16x(void *dp, int32 *lp, int32 c);
- extern void s32tou16x(void *dp, int32 *lp, int32 c);
- /* uLaw (8 bits) */
- extern void s32toulaw(void *dp, int32 *lp, int32 c);
- /* little-endian and big-endian specific */
- #if SDL_BYTEORDER == SDL_LIL_ENDIAN
- #define s32tou16l s32tou16
- #define s32tou16b s32tou16x
- #define s32tos16l s32tos16
- #define s32tos16b s32tos16x
- #else
- #define s32tou16l s32tou16x
- #define s32tou16b s32tou16
- #define s32tos16l s32tos16x
- #define s32tos16b s32tos16
- #endif