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output.h
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output.h
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/*
TiMidity -- Experimental MIDI to WAVE converter
Copyright (C) 1995 Tuukka Toivonen <[email protected]>
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.
output.h
*/
/* Data format encoding bits */
#ifndef KMIDI_OUTPUT
#define KMIDI_OUTPUT
#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 {
uint32 rate, encoding;
int fd; /* file descriptor for the audio device */
int32 extra_param[5]; /* e.g. buffer fragments, output channel, ... */
const char *id_name;
char id_character;
const char *name; /* default device or file name */
int (*open_output)(void); /* 0=success, 1=warning, -1=fatal error */
void (*close_output)(void);
void (*output_data)(int32 *buf, uint32 count);
int (*driver_output_data)(unsigned char *buf, uint32 count);
void (*flush_output)(void);
void (*purge_output)(void);
int (*output_count)(uint32 ct);
} PlayMode;
extern PlayMode *play_mode_list[], *play_mode;
extern char *cfg_names[];
extern int got_a_configuration;
extern int output_buffer_full;
extern int output_device_open;
/* extern int current_sample_count(uint32 ct); */
/* extern int driver_output_data(char *buf, uint32 count); */
extern int b_out_count(void);
extern void b_out(char id, int fd, int *buf, int ocount);
/* Conversion functions -- These overwrite the int32 data in *lp with
data in another format */
extern int output_clips;
/* 8-bit signed and unsigned*/
extern void s32tos8(int32 *lp, uint32 c);
extern void s32tou8(int32 *lp, uint32 c);
/* 16-bit */
extern void s32tos16(int32 *lp, uint32 c);
extern void s32tou16(int32 *lp, uint32 c);
/* byte-exchanged 16-bit */
extern void s32tos16x(int32 *lp, uint32 c);
extern void s32tou16x(int32 *lp, uint32 c);
/* uLaw (8 bits) */
extern void s32toulaw(int32 *lp, uint32 c);
/* little-endian and big-endian specific */
#ifdef LITTLE_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
#endif /*KMIDI_OUTPUT*/