ref: af81c85a823c9ce0b2524e89faf6e42e3cbf4d0f
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>
#include "ststdint.h"
/* Release 12.18.2 of libst */
#define ST_LIB_VERSION_CODE 0x0c1202
#define ST_LIB_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
/* C language enhancements: */
/* Boolean type, compatible with C++ */
typedef enum {false, true} bool;
/* Compile-time ("static") assertion */
/* e.g. assert_static(sizeof(int) >= 4, int_type_too_small) */
#define assert_static(e,f) enum {assert_static__##f = 1/(e)}
/* Array-length operator */
#define array_length(a) (sizeof(a)/sizeof(a[0]))
typedef int32_t st_sample_t;
typedef uint32_t st_size_t;
typedef int32_t st_ssize_t;
typedef uint32_t st_rate_t;
/* Minimum and maximum values a sample can hold. */
#define ST_SAMPLE_MAX 2147483647L
#define ST_SAMPLE_MIN (-ST_SAMPLE_MAX - 1L)
#define ST_SAMPLE_FLOAT_UNSCALE 2147483647.0
#define ST_SAMPLE_FLOAT_SCALE 2147483648.0
#define ST_UNSIGNED_BYTE_TO_SAMPLE(d) ((st_sample_t)((d) ^ 0x80) << 24)
#define ST_SIGNED_BYTE_TO_SAMPLE(d) ((st_sample_t)(d) << 24)
#define ST_UNSIGNED_WORD_TO_SAMPLE(d) ((st_sample_t)((d) ^ 0x8000) << 16)
#define ST_SIGNED_WORD_TO_SAMPLE(d) ((st_sample_t)(d) << 16)
#define ST_UNSIGNED_DWORD_TO_SAMPLE(d) ((st_sample_t)((d) ^ 0x80000000L))
#define ST_SIGNED_DWORD_TO_SAMPLE(d) ((st_sample_t)d)
/* FIXME: This is an approximation because it
* doesn't account for -1.0 mapping to -FLOAT_SCALE-1. */
#define ST_FLOAT_DWORD_TO_SAMPLE(d) ((st_sample_t)(d*ST_SAMPLE_FLOAT_UNSCALE))
#define ST_FLOAT_DDWORD_TO_SAMPLE(d) ((st_sample_t)(d*ST_SAMPLE_FLOAT_UNSCALE))
#define ST_SAMPLE_TO_UNSIGNED_BYTE(d) ((uint8_t)((d) >> 24) ^ 0x80)
#define ST_SAMPLE_TO_SIGNED_BYTE(d) ((int8_t)((d) >> 24))
#define ST_SAMPLE_TO_UNSIGNED_WORD(d) ((uint16_t)((d) >> 16) ^ 0x8000)
#define ST_SAMPLE_TO_SIGNED_WORD(d) ((int16_t)((d) >> 16))
#define ST_SAMPLE_TO_UNSIGNED_DWORD(d) ((uint32_t)(d) ^ 0x80000000L)
#define ST_SAMPLE_TO_SIGNED_DWORD(d) ((int32_t)(d))
/* FIXME: This is an approximation because its impossible to
* to reach 1.
*/
#define ST_SAMPLE_TO_FLOAT_DWORD(d) ((float)(d/(ST_SAMPLE_FLOAT_SCALE)))
#define ST_SAMPLE_TO_FLOAT_DDWORD(d) ((double)((double)d/(ST_SAMPLE_FLOAT_SCALE)))
/* MACRO to clip a data type that is greater then st_sample_t to
* st_sample_t's limits.
*/
#define ST_SAMPLE_CLIP(samp) \
do { \
if (samp > ST_SAMPLE_MAX) \
{ samp = ST_SAMPLE_MAX; } \
else if (samp < ST_SAMPLE_MIN) \
{ samp = ST_SAMPLE_MIN; } \
} while (0)
/* MACRO to clip a data type that is greater then st_sample_t to
* st_sample_t's limits and increment a counter if clipping occurs..
*/
#define ST_SAMPLE_CLIP_COUNT(samp, clips) \
do { \
if (samp > ST_SAMPLE_MAX) \
{ samp = ST_SAMPLE_MAX; clips++; } \
else if (samp < ST_SAMPLE_MIN) \
{ samp = ST_SAMPLE_MIN; clips++; } \
} while (0)
/* MACRO to clip a normalized floating point data between 1.0 and -1.0
* to those limits and increment a counter when clipping occurs.
*/
#define ST_NORMALIZED_CLIP_COUNT(samp, clips) \
do { \
if (samp > 1) \
{ samp = 1; clips++; } \
else if (samp < -1) \
{ samp = -1; clips++; } \
} while (0)
/* Maximum value size type can hold. (Minimum is 0). */
#define ST_SIZE_MAX 0xffffffffL
/* Minimum and maximum value signed size type can hold. */
#define ST_SSIZE_MAX 0x7fffffffL
#define ST_SSIZE_MIN (-ST_SSIZE_MAX - 1L)
/* Signal parameters */
typedef struct st_signalinfo
{
st_rate_t rate; /* sampling rate */
signed char size; /* word length of data */
signed char encoding; /* format of sample numbers */
signed char channels; /* number of sound channels */
char swap; /* do byte- or word-swap */
double compression; /* compression factor (where applicable) */
} st_signalinfo_t;
/* Loop parameters */
typedef struct st_loopinfo
{
st_size_t start; /* first sample */
st_size_t length; /* length */
unsigned int count; /* number of repeats, 0=forever */
signed char type; /* 0=no, 1=forward, 2=forward/back */
} st_loopinfo_t;
/* Instrument parameters */
/* vague attempt at generic information for sampler-specific info */
typedef struct st_instrinfo
{
char MIDInote; /* for unity pitch playback */
char MIDIlow, MIDIhi;/* MIDI pitch-bend range */
char loopmode; /* semantics of loop data */
signed char nloops; /* number of active loops (max ST_MAX_NLOOPS) */
} st_instrinfo_t;
/* 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.
*/
typedef struct st_fileinfo
{
char *buf; /* Pointer to data buffer */
size_t size; /* Size of buffer */
size_t count; /* Count read in to buffer */
size_t pos; /* Position in buffer */
unsigned char eof; /* Marker that EOF has been reached */
} st_fileinfo_t;
/*
* Format information for input and output files.
*/
#define ST_MAX_FILE_PRIVSIZE 1000
#define ST_MAX_EFFECT_PRIVSIZE 1000
#define ST_MAX_NLOOPS 8
/*
* Handler structure for each format.
*/
typedef struct st_soundstream *ft_t;
typedef struct st_format {
char **names;
char *usage;
unsigned int flags;
int (*startread)(ft_t ft);
st_ssize_t (*read)(ft_t ft, st_sample_t *buf, st_ssize_t len);
int (*stopread)(ft_t ft);
int (*startwrite)(ft_t ft);
st_ssize_t (*write)(ft_t ft, st_sample_t *buf, st_ssize_t len);
int (*stopwrite)(ft_t ft);
int (*seek)(ft_t ft, st_size_t offset);
} st_format_t;
struct st_soundstream {
st_signalinfo_t info; /* signal specifications */
st_instrinfo_t instr; /* instrument specification */
st_loopinfo_t loops[ST_MAX_NLOOPS]; /* Looping specification */
char swap; /* do byte- or word-swap */
char seekable; /* can seek on this file */
char mode; /* read or write mode */
/* Total samples per channel of file. Zero if unknown. */
st_size_t length;
char *filename; /* file name */
char *filetype; /* type of file */
char *comment; /* comment string */
FILE *fp; /* File stream pointer */
st_fileinfo_t file; /* File data block */
int st_errno; /* Failure error codes */
char st_errstr[256]; /* Extend Failure text */
const st_format_t *h; /* format struct for this file */
/* The following is a portable trick to align this variable on
* an 8-byte bounder. Once this is done, the buffer alloced
* after it should be align on an 8-byte boundery as well.
* This lets you cast any structure over the private area
* without concerns of alignment.
*/
double priv1;
char priv[ST_MAX_FILE_PRIVSIZE]; /* format's private data area */
};
/* 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 specs? */
#define ST_FILE_SEEK 8 /* does file format support seeking? */
#define ST_FILE_NOSTDIO 16 /* does not use stdio routines */
/* Size field */
#define ST_SIZE_BYTE 1
#define ST_SIZE_8BIT 1
#define ST_SIZE_WORD 2
#define ST_SIZE_16BIT 2
#define ST_SIZE_24BIT 3
#define ST_SIZE_DWORD 4
#define ST_SIZE_32BIT 4
#define ST_SIZE_DDWORD 8
#define ST_SIZE_64BIT 8
#define ST_INFO_SIZE_MAX 8
/* 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_FLOAT 5 /* 32-bit float */
#define ST_ENCODING_ADPCM 6 /* Compressed PCM */
#define ST_ENCODING_IMA_ADPCM 7 /* Compressed PCM */
#define ST_ENCODING_GSM 8 /* GSM 6.10 33byte frame lossy compression */
#define ST_ENCODING_INV_ULAW 9 /* Inversed bit-order u-law */
#define ST_ENCODING_INV_ALAW 10/* Inversed bit-order A-law */
#define ST_ENCODING_MP3 11/* MP3 compression */
#define ST_ENCODING_VORBIS 12/* Vorbis compression */
#define ST_ENCODING_FLAC 13/* FLAC compression */
#define ST_ENCODING_MAX 13
/* declared in misc.c */
extern const char *st_sizes_str[];
extern const char *st_size_bits_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 */
char *usage;
unsigned int flags;
int (*getopts)(eff_t effp, int argc, char **argv);
int (*start)(eff_t effp);
int (*flow)(eff_t effp, st_sample_t *ibuf, st_sample_t *obuf,
st_size_t *isamp, st_size_t *osamp);
int (*drain)(eff_t effp, st_sample_t *obuf, st_size_t *osamp);
int (*stop)(eff_t effp);
} st_effect_t;
struct st_effect
{
char *name; /* effect name */
struct st_signalinfo ininfo; /* input signal specifications */
struct st_signalinfo outinfo; /* output signal specifications */
const st_effect_t *h; /* effects driver */
st_sample_t *obuf; /* output buffer */
st_size_t odone, olen; /* consumed, total length */
/* The following is a portable trick to align this variable on
* an 8-byte bounder. Once this is done, the buffer alloced
* after it should be align on an 8-byte boundery as well.
* This lets you cast any structure over the private area
* without concerns of alignment.
*/
double priv1;
char priv[ST_MAX_EFFECT_PRIVSIZE]; /* private area for effect */
};
extern ft_t st_open_read(const char *path, const st_signalinfo_t *info,
const char *filetype);
extern ft_t st_open_write(const char *path, const st_signalinfo_t *info,
const char *filetype, const char *comment);
extern ft_t st_open_write_instr(const char *path, const st_signalinfo_t *info,
const char *filetype, const char *comment,
const st_instrinfo_t *instr,
const st_loopinfo_t *loops);
extern st_ssize_t st_read(ft_t ft, st_sample_t *buf, st_ssize_t len);
extern st_ssize_t st_write(ft_t ft, st_sample_t *buf, st_ssize_t len);
extern int st_close(ft_t ft);
#define ST_SEEK_SET 0
extern int st_seek(ft_t ft, st_size_t offset, int whence);
int st_geteffect_opt(eff_t, int, char **);
int st_geteffect(eff_t, char *);
int st_checkeffect(char *);
int st_updateeffect(eff_t, st_signalinfo_t *in, st_signalinfo_t *out, int);
int st_gettype(ft_t);
ft_t st_initformat(void);
int st_parsesamples(st_rate_t rate, char *str, st_size_t *samples, char def);
/* FIXME: these declared in util.c, global is inappropriate for lib */
extern int verbose; /* be noisy on stderr */
extern char *myname;
#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 2002 /* Unsupported rate for format */
#define ST_ENOMEM 2003 /* Can't alloc memory */
#define ST_EPERM 2004 /* Operation not permitted */
#define ST_ENOTSUP 2005 /* Operation not supported */
#define ST_EINVAL 2006 /* Invalid argument */
#define ST_EFFMT 2007 /* Unsupported file format */
#ifdef __cplusplus
} /* end of extern "C" */
#endif
#endif