ref: 7cfe6fdb10ec6fe6cb9c7e80b28df0ed9abfd1e5
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.
*/
#ifdef __cplusplus
extern "C" {
#endif
#include <stdio.h>
#include <stdlib.h>
#ifdef HAVE_MALLOC_H
#include <malloc.h>
#endif
#ifdef HAVE_BYTESWAP_H
#include <byteswap.h>
#endif
/* Release 12.17.2 of libst */
#define ST_LIB_VERSION_CODE 0x0c1102
#define ST_LIB_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
/* 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 0xffffffffL
/* various gcc optimizations */
#ifdef __GNUC__
#define NORET __attribute__((noreturn))
#define INLINE inline
#else
#define NORET
#define INLINE
#endif
#ifdef USE_REGPARM
#define REGPARM(n) __attribute__((regparm(n)))
#else
#define REGPARM(n)
#endif
/* Signal parameters */
/* FIXME: Change to typedef */
struct st_signalinfo {
LONG rate; /* sampling rate */
int size; /* word length of data */
int encoding; /* format of sample numbers */
int channels; /* number of sound channels */
};
/* Loop parameters */
/* FIXME: Change to typedef */
struct st_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 st_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 ST_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 ST_LOOP_NONE 0
#define ST_LOOP_8 32 /* 8 loops: don't know ?? */
#define ST_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 st_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 ST_MAX_PRIVSIZE 330
#define ST_MAX_NLOOPS 8
/*
* Handler structure for each format.
*/
typedef struct st_soundstream *ft_t;
typedef struct st_format {
char **names; /* file type names */
int flags; /* details about file type */
int (*startread)(ft_t ft);
LONG (*read)(ft_t ft, LONG *buf, LONG len);
int (*stopread)(ft_t ft);
int (*startwrite)(ft_t ft);
LONG (*write)(ft_t ft, LONG *buf, LONG len);
int (*stopwrite)(ft_t ft);
} st_format_t;
struct st_soundstream {
struct st_signalinfo info; /* signal specifications */
struct st_instrinfo instr; /* instrument specification */
struct st_loopinfo loops[ST_MAX_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 st_fileinfo file; /* File data block */
int st_errno; /* Failure error codes */
char st_errstr[256]; /* Extend Failure text */
st_format_t *h; /* format struct for this file */
/* FIXME: I perfer void * or char * */
double priv[ST_MAX_PRIVSIZE/8]; /* format's private data area */
};
extern st_format_t st_formats[];
/* file flags field */
#define ST_FILE_STEREO 1 /* does file format support stereo? */
#define ST_FILE_LOOPS 2 /* does file format support loops? */
#define ST_FILE_INSTR 4 /* does file format support instrument specificications? */
/* Size field */
/* SJB: note that the 1st 3 are sometimes used as sizeof(type) */
#define ST_SIZE_BYTE 1
#define ST_SIZE_8BIT 1
#define ST_SIZE_WORD 2
#define ST_SIZE_16BIT 2
#define ST_SIZE_DWORD 4
#define ST_SIZE_32BIT 4
#define ST_SIZE_FLOAT 5
#define ST_SIZE_DOUBLE 6
#define ST_SIZE_IEEE 7 /* IEEE 80-bit floats. */
/* Style field */
#define ST_ENCODING_UNSIGNED 1 /* unsigned linear: Sound Blaster */
#define ST_ENCODING_SIGN2 2 /* signed linear 2's comp: Mac */
#define ST_ENCODING_ULAW 3 /* U-law signed logs: US telephony, SPARC */
#define ST_ENCODING_ALAW 4 /* A-law signed logs: non-US telephony */
#define ST_ENCODING_ADPCM 5 /* Compressed PCM */
#define ST_ENCODING_IMA_ADPCM 6 /* Compressed PCM */
#define ST_ENCODING_GSM 7 /* GSM 6.10 33-byte frame lossy compression */
/* declared in misc.c */
extern const char *st_sizes_str[];
extern const char *st_encodings_str[];
#define ST_EFF_CHAN 1 /* Effect can mix channels up/down */
#define ST_EFF_RATE 2 /* Effect can alter data rate */
#define ST_EFF_MCHAN 4 /* Effect can handle multi-channel */
#define ST_EFF_REPORT 8 /* Effect does nothing */
/*
* Handler structure for each effect.
*/
typedef struct st_effect *eff_t;
typedef struct {
char *name; /* effect name */
int flags; /* this and that */
/* process arguments */
int (*getopts)(eff_t effp, int argc, char **argv);
/* start off effect */
int (*start)(eff_t effp);
/* do a buffer */
int (*flow)(eff_t effp, LONG *ibuf, LONG *obuf,
LONG *isamp, LONG *osamp);
/* drain out at end */
int (*drain)(eff_t effp, LONG *obuf, LONG *osamp);
int (*stop)(eff_t effp); /* finish up effect */
} st_effect_t;
struct st_effect {
char *name; /* effect name */
struct st_signalinfo ininfo; /* input signal specifications */
struct st_loopinfo loops[8]; /* input loops specifications */
struct st_instrinfo instr; /* input instrument specifications */
struct st_signalinfo outinfo; /* output signal specifications */
st_effect_t *h; /* effects driver */
LONG *obuf; /* output buffer */
LONG odone, olen; /* consumed, total length */
/* FIXME: I perfer void * or char * */
double priv[ST_MAX_PRIVSIZE]; /* private area for effect */
};
extern st_effect_t st_effects[]; /* declared in handlers.c */
/* declared in misc.c */
extern LONG st_clip24(LONG) REGPARM(1);
extern void st_sine(int *, LONG, int, int);
extern void st_triangle(int *, LONG, int, int);
extern LONG st_gcd(LONG,LONG) REGPARM(2);
extern LONG st_lcm(LONG,LONG) REGPARM(2);
/****************************************************/
/* Prototypes for internal cross-platform functions */
/****************************************************/
/* SJB: shouldn't these be elsewhere, exported from misc.c */
/* CB: Yep, we need to create something like a "platform.h" file for
* these type functions.
*/
#ifndef HAVE_RAND
extern int rand(void);
extern void srand(unsigned int seed);
#endif
extern void st_initrand(void);
#ifndef HAVE_STRERROR
char *strerror(int errorcode);
#endif
/* Read and write basic data types from "ft" stream. Uses ft->swap for
* possible byte swapping.
*/
/* declared in misc.c */
LONG st_read(ft_t ft, void *buf, int size, LONG len);
LONG st_write(ft_t ft, void *buf, int size, LONG len);
int st_reads(ft_t ft, char *c, int len);
int st_writes(ft_t ft, char *c);
int st_readb(ft_t ft, unsigned char *uc);
int st_writeb(ft_t ft, unsigned char uc);
int st_readw(ft_t ft, unsigned short *us);
int st_writew(ft_t ft, unsigned short us);
int st_readdw(ft_t ft, ULONG *ul);
int st_writedw(ft_t ft, ULONG ul);
int st_readf(ft_t ft, float *f);
int st_writef(ft_t ft, double f);
int st_readdf(ft_t ft, double *d);
int st_writedf(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 */
int st_rawstartread(ft_t ft);
int st_rawstartwrite(ft_t ft);
int st_rawstopread(ft_t ft);
int st_rawstopwrite(ft_t ft);
LONG st_rawread(ft_t ft, LONG *buf, LONG nsamp);
LONG st_rawwrite(ft_t ft, LONG *buf, LONG nsamp);
/* Utilities to byte-swap values, use libc optimized macro's if possible */
#ifdef HAVE_BYTESWAP_H
#define st_swapw(x) bswap_16(x)
#define st_swapl(x) bswap_32(x)
#define st_swapf(x) (float)bswap_32((ULONG)(x))
#else
unsigned short st_swapw(unsigned short us); /* Swap short */
ULONG st_swapl(ULONG ul); /* Swap long */
float st_swapf(float f); /* Swap float */
#endif
double st_swapd(double d); /* Swap double */
/* util.c */
void st_report(const char *, ...);
void st_warn(const char *, ...);
void st_fail(const char *, ...) NORET;
void st_fail_errno(ft_t, int, const char *, ...);
int st_is_bigendian(void);
int st_is_littleendian(void);
#ifdef WORDS_BIGENDIAN
#define ST_IS_BIGENDIAN 1
#define ST_IS_LITTLEENDIAN 0
#else
#define ST_IS_BIGENDIAN st_is_bigendian()
#define ST_IS_LITTLEENDIAN st_is_littleendian()
#endif
int st_geteffect_opt(eff_t, int, char **);
int st_geteffect(eff_t, char *);
int st_updateeffect(eff_t, ft_t, ft_t, int);
void st_gettype(ft_t);
void st_checkformat(ft_t);
void st_copyformat(ft_t, ft_t);
void st_cmpformats(ft_t, ft_t);
double st_parsetime(char *);
/* 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(ft_t);
/* export flags */
/* FIXME: these declared in util.c, inappropriate for lib */
extern int verbose; /* be noisy on stderr */
extern char *myname;
/* Warning, this is a MAX value used in the library. Each format and
* effect may have its own limitations of rate.
*/
#define ST_MAXRATE 50L * 1024 /* maximum sample rate in library */
/* 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
#ifndef M_PI_2
#define M_PI_2 1.57079632679489661923 /* pi/2 */
#endif
/* FIXME: Move to platform header file */
#define READBINARY "rb"
#define WRITEBINARY "wb"
#define REMOVE unlink
#define ST_EOF (-1)
#define ST_SUCCESS (0)
const char *st_version(void); /* return version number */
/* ST specific error codes. The rest directly map from errno. */
#define ST_EHDR 2000 /* Invalid Audio Header */
#define ST_EFMT 2001 /* Unsupported data format */
#define ST_ERATE 20002 /* Unsupported rate for format */
#define ST_ENOMEM 2003 /* Can't alloc memory */
#ifdef __cplusplus
} /* end of extern "C" */
#endif
#endif