ref: 8a4f90fa0ac35ff2e742c904b2572ed4475e58ae
dir: /src/st.h/
#ifndef ST_H
#define ST_H
/*
* Sound Tools Library - October 11, 1999
*
* Copyright 1999 Chris Bagwell
*
* This source code is freely redistributable and may be used for
* any purpose. This copyright notice must be maintained.
* Chris Bagwell And Sundry Contributors are not responsible for
* the consequences of using this software.
*/
#include <stdio.h>
#include <stdlib.h>
#ifdef HAVE_MALLOC_H
#include <malloc.h>
#endif
#ifdef HAVE_BYTESWAP_H
#include <byteswap.h>
#endif
/* SJB: these may be changed to assist fail-recovery in libST */
#define st_malloc malloc
#define st_free free
/* FIXME: Move to separate header */
#ifdef __alpha__
#include <sys/types.h> /* To get defines for 32-bit integers */
#define LONG int32_t
#define ULONG u_int32_t
#else
#define LONG long
#define ULONG unsigned long
#endif
#define MAXLONG 0x7fffffffL
#define MAXULONG 0xffffffff
/* various gcc optimizations */
#ifdef __GNUC__
#define NORET __attribute__((noreturn))
#define REGPARM(n) __attribute__((regparm(n)))
#define INLINE inline
#else
#define NORET
#define REGPARM(n)
#define INLINE
#endif
/*
* Handler structure for each format.
*/
typedef struct format {
char **names; /* file type names */
int flags; /* details about file type */
void (*startread)();
LONG (*read)();
void (*stopread)();
void (*startwrite)();
void (*write)();
void (*stopwrite)();
} format_t;
/* FIXME: Does this need to be here? */
extern format_t formats[];
/* Signal parameters */
/* FIXME: Change to typedef */
struct signalinfo {
LONG rate; /* sampling rate */
int size; /* word length of data */
int style; /* format of sample numbers */
int channels; /* number of sound channels */
unsigned short bs; /* requested blocksize, eg for output .wav's */
unsigned char dovol; /* has volume factor */
double vol; /* volume factor */
ULONG x; /* current sample number */
ULONG x0; /* 1st sample (if source) */
ULONG x1; /* top sample (if source) */
};
/* Loop parameters */
/* FIXME: Change to typedef */
struct loopinfo {
int start; /* first sample */
int length; /* length */
int count; /* number of repeats, 0=forever */
int type; /* 0=no, 1=forward, 2=forward/back */
};
/* Instrument parameters */
/* vague attempt at generic information for sampler-specific info */
/* FIXME: Change to typedef */
struct instrinfo {
char MIDInote; /* for unity pitch playback */
char MIDIlow, MIDIhi;/* MIDI pitch-bend range */
char loopmode; /* semantics of loop data */
char nloops; /* number of active loops */
unsigned char smpte[4]; /* SMPTE offset (hour:min:sec:frame) */
/* this is a film audio thing */
};
#define MIDI_UNITY 60 /* MIDI note number to play sample at unity */
/* Loop modes, upper 4 bits mask the loop blass, lower 4 bits describe */
/* the loop behaviour, ie. single shot, bidirectional etc. */
#define LOOP_NONE 0
#define LOOP_8 32 /* 8 loops: don't know ?? */
#define LOOP_SUSTAIN_DECAY 64 /* AIFF style: one sustain & one decay loop */
/*
* File buffer info. Holds info so that data can be read in blocks.
*/
/* FIXME: Change to typedef */
struct fileinfo {
char *buf; /* Pointer to data buffer */
int size; /* Size of buffer */
int count; /* Count read in to buffer */
int pos; /* Position in buffer */
int eof; /* Marker that EOF has been reached */
};
/*
* Format information for input and output files.
*/
#define PRIVSIZE 330
#define NLOOPS 8
struct soundstream {
struct signalinfo info; /* signal specifications */
struct instrinfo instr; /* instrument specification */
struct loopinfo loops[NLOOPS]; /* Looping specification */
char swap; /* do byte- or word-swap */
char seekable; /* can seek on this file */
char *filename; /* file name */
char *filetype; /* type of file */
char *comment; /* comment string */
FILE *fp; /* File stream pointer */
struct fileinfo file; /* File data block */
format_t *h; /* format struct for this file */
/* FIXME: I perfer void * or char * */
double priv[PRIVSIZE/8]; /* format's private data area */
};
typedef struct soundstream *ft_t;
/* FIXME: Prefix all #defines with ST_ */
/* flags field */
#define FILE_STEREO 1 /* does file format support stereo? */
#define FILE_LOOPS 2 /* does file format support loops? */
#define FILE_INSTR 4 /* does file format support instrument specificications? */
/* Size field */ /* SJB: note that the 1st 3 are sometimes used as sizeof(type) */
#define BYTE 1
#define WORD 2
#define DWORD 4
#define FLOAT 5
#define DOUBLE 6
#define IEEE 7 /* IEEE 80-bit floats. Is it necessary? */
/* Style field */
#define UNSIGNED 1 /* unsigned linear: Sound Blaster */
#define SIGN2 2 /* signed linear 2's comp: Mac */
#define ULAW 3 /* U-law signed logs: US telephony, SPARC */
#define ALAW 4 /* A-law signed logs: non-US telephony */
#define ADPCM 5 /* Compressed PCM */
#define IMA_ADPCM 6 /* Compressed PCM */
#define GSM 7 /* GSM 6.10 33-byte frame lossy compression */
/* FIXME: This shouldn't be defined inside library. Only needed
* by sox.c itself. Delete from raw.c and misc.c.
*/
/* declared in misc.c */
extern const char *sizes[];
extern const char *styles[];
/*
* Handler structure for each effect.
*/
typedef struct {
char *name; /* effect name */
int flags; /* this and that */
void (*getopts)(); /* process arguments */
void (*start)(); /* start off effect */
void (*flow)(); /* do a buffer */
void (*drain)(); /* drain out at end */
void (*stop)(); /* finish up effect */
} effect_t;
extern effect_t effects[]; /* declared in handlers.c */
#define EFF_CHAN 1 /* Effect can mix channels up/down */
#define EFF_RATE 2 /* Effect can alter data rate */
#define EFF_MCHAN 4 /* Effect can handle multi-channel */
#define EFF_REPORT 8 /* Effect does nothing */
struct effect {
char *name; /* effect name */
struct signalinfo ininfo; /* input signal specifications */
struct loopinfo loops[8]; /* input loops specifications */
struct instrinfo instr; /* input instrument specifications */
struct signalinfo outinfo; /* output signal specifications */
effect_t *h; /* effects driver */
LONG *obuf; /* output buffer */
LONG odone, olen; /* consumed, total length */
double priv[PRIVSIZE]; /* private area for effect */
};
typedef struct effect *eff_t;
/* FIXME: Move to internal st header */
#if defined(__STDC__)
#define P0 void
#define P1(a) a
#define P2(a,b) a, b
#define P3(a,b,c) a, b, c
#define P4(a,b,c,d) a, b, c, d
#define P5(a,b,c,d,e) a, b, c, d, e
#define P6(a,b,c,d,e,f) a, b, c, d, e, f
#define P7(a,b,c,d,e,f,g) a, b, c, d, e, f, g
#define P8(a,b,c,d,e,f,g,h) a, b, c, d, e, f, g, h
#define P9(a,b,c,d,e,f,g,h,i) a, b, c, d, e, f, g, h, i
#define P10(a,b,c,d,e,f,g,h,i,j) a, b, c, d, e, f, g, h, i, j
#else
#define P0
#define P1(a)
#define P2(a,b)
#define P3(a,b,c)
#define P4(a,b,c,d)
#define P5(a,b,c,d,e)
#define P6(a,b,c,d,e,f)
#define P7(a,b,c,d,e,f,g)
#define P8(a,b,c,d,e,f,g,h)
#define P9(a,b,c,d,e,f,g,h,i)
#define P10(a,b,c,d,e,f,g,h,i,j)
#endif
/* declared in misc.c */
extern LONG st_clip24(P1(LONG)) REGPARM(1);
extern void st_sine(P4(int *, LONG, int, int));
extern void st_triangle(P4(int *, LONG, int, int));
extern LONG st_gcd(P2(LONG,LONG)) REGPARM(2);
extern LONG st_lcm(P2(LONG,LONG)) REGPARM(2);
/****************************************************/
/* Prototypes for internal cross-platform functions */
/****************************************************/
/* SJB: shouldn't these be elsewhere, exported from misc.c */
#ifndef HAVE_RAND
extern int rand(P0);
extern void srand(P1(ULONG seed));
#endif
extern void st_initrand(P0);
#ifndef HAVE_STRERROR
char *strerror(P1(int errorcode));
#endif
/* Read and write basic data types from "ft" stream. Uses ft->swap for
* possible byte swapping.
*/
/* declared in misc.c */
unsigned short rshort(P1(ft_t ft));
unsigned short wshort(P2(ft_t ft, unsigned short us));
ULONG rlong(P1(ft_t ft));
ULONG wlong(P2(ft_t ft, ULONG ul));
float rfloat(P1(ft_t ft));
void wfloat(P2(ft_t ft, double f));
double rdouble(P1(ft_t ft));
void wdouble(P2(ft_t ft, double d));
/* FIXME: raw routines are used by so many formats their prototypes are defined
* here for convience. This wont last for long so application software
* shouldn't make use of it.
*/
/* declared in raw.c */
void rawstartread(P1(ft_t ft));
void rawstartwrite(P1(ft_t ft));
void rawstopread(P1(ft_t ft));
void rawstopwrite(P1(ft_t ft));
LONG rawread(P3(ft_t ft, LONG *buf, LONG nsamp));
void rawwrite(P3(ft_t ft, LONG *buf, LONG nsamp));
/* Utilities to byte-swap values, use libc optimized macro's if possible */
#ifdef HAVE_BYTESWAP_H
#define swapw(x) bswap_16(x)
#define swapl(x) bswap_32(x)
#define swapf(x) (float)bswap_32((ULONG)(x))
#else
unsigned short swapw(P1(unsigned short us)); /* Swap short */
ULONG swapl(P1(ULONG ul)); /* Swap long */
float swapf(P1(float f)); /* Swap float */
#endif
double swapd(P1(double d)); /* Swap double */
/* util.c */
void report(P2(const char *, ...));
void warn(P2(const char *, ...));
void fail(P2(const char *, ...))NORET;
void geteffect(P1(eff_t));
void gettype(P1(ft_t));
void checkformat(P1(ft_t));
void copyformat(P2(ft_t, ft_t));
void cmpformats(P2(ft_t, ft_t));
/* FIXME: Recording hacks shouldn't display a "sigint" style interface.
* Instead we should provide a function to call when done playing/recording.
* sox.c should be responsible for registering to sigint.
*/
void sigintreg(P1(ft_t));
/* export flags */
/* FIXME: these declared in util.c, inappropriate for lib */
extern int verbose; /* be noisy on stderr */
extern char *myname;
/* FIXME: Not externally visible currently. Its a per-effect value. */
#define MAXRATE 50L * 1024 /* maximum sample rate */
/* FIXME: Move to internal st header */
#define RIGHT(datum, bits) ((datum) >> bits)
#define LEFT(datum, bits) ((datum) << bits)
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif
#define READBINARY "rb"
#define WRITEBINARY "wb"
#define REMOVE unlink
const char *version(P0); /* return version number */
#endif