ref: 78daababb39e68856af9b5932c4874d58f7bc78c
dir: /src/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.
*/
#ifndef ST_H
#define ST_H
#include <stdio.h>
#include <stdlib.h>
#include "ststdint.h"
/* Avoid warnings about unused parameters. */
#ifdef __GNUC__
#define UNUSED __attribute__ ((unused))
#endif
/* 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)}
#ifdef min
#undef min
#endif
#define min(a, b) ((a) <= (b) ? (a) : (b))
#ifdef max
#undef max
#endif
#define max(a, b) ((a) >= (b) ? (a) : (b))
/* Array-length operator */
#define array_length(a) (sizeof(a)/sizeof(a[0]))
typedef int32_t int24_t; /* But beware of the extra byte. */
typedef uint32_t uint24_t; /* ditto */
#define ST_INT_MIN(bits) (1L <<((bits)-1))
#define ST_INT_MAX(bits) (-1UL>>(33-(bits)))
#define ST_UINT_MAX(bits) (ST_INT_MIN(bits)|ST_INT_MAX(bits))
#define ST_INT8_MAX ST_INT_MAX(8)
#define ST_INT16_MAX ST_INT_MAX(16)
#define ST_INT24_MAX ST_INT_MAX(24)
#define ST_INT32_MAX ST_INT_MAX(32)
#define ST_INT64_MAX 0x7fffffffffffffffLL /* Not in use yet */
typedef int32_t st_sample_t;
typedef uint32_t st_usample_t; /* FIXME: this naming is different from
other types */
/* Minimum and maximum values a sample can hold. */
#define ST_SAMPLE_MAX (st_sample_t)ST_INT_MAX(32)
#define ST_SAMPLE_MIN (st_sample_t)ST_INT_MIN(32)
/* Conversions: Linear PCM <--> st_sample_t
*
* I/O I/O st_sample_t Clips? I/O st_sample_t Clips?
* Format Minimum Minimum I O Maximum Maximum I O
* ------ --------- ------------ -- -- -------- ------------ -- --
* Float -1 -1.00000000047 y y 1 1 y n
* Byte -128 -128 n n 127 127.9999999 n y
* Word -32768 -32768 n n 32767 32767.99998 n y
* 24bit -8388608 -8388608 n n 8388607 8388607.996 n y
* Dword -2147483648 -2147483648 n n 2147483647 2147483647 n n
*
* Conversions are as accurate as possible (with rounding).
*
* Rounding: halves toward +inf, all others to nearest integer.
*
* Clips? shows whether on not there is the possibility of a conversion
* clipping to the minimum or maximum value when inputing from or outputing
* to a given type.
*
* Unsigned integers are converted to and from signed integers by flipping
* the upper-most bit then treating them as signed integers.
*/
/* Temporary variables to prevent multiple evaluation of macro arguments: */
static st_sample_t st_macro_temp_sample UNUSED;
static double st_macro_temp_double UNUSED;
#define ST_SAMPLE_NEG ST_INT_MIN(32)
#define ST_SAMPLE_TO_UNSIGNED(bits,d,clips) \
(uint##bits##_t)( \
st_macro_temp_sample=d, \
st_macro_temp_sample>(st_sample_t)(ST_SAMPLE_MAX-(1UL<<(31-bits)))? \
++(clips),ST_UINT_MAX(bits): \
((uint32_t)(st_macro_temp_sample^ST_SAMPLE_NEG)+(1UL<<(31-bits)))>>(32-bits))
#define ST_SAMPLE_TO_SIGNED(bits,d,clips) \
(int##bits##_t)(ST_SAMPLE_TO_UNSIGNED(bits,d,clips)^ST_INT_MIN(bits))
#define ST_SIGNED_TO_SAMPLE(bits,d)((st_sample_t)(d)<<(32-bits))
#define ST_UNSIGNED_TO_SAMPLE(bits,d)(ST_SIGNED_TO_SAMPLE(bits,d)^ST_SAMPLE_NEG)
#define ST_UNSIGNED_BYTE_TO_SAMPLE(d,clips) ST_UNSIGNED_TO_SAMPLE(8,d)
#define ST_SIGNED_BYTE_TO_SAMPLE(d,clips) ST_SIGNED_TO_SAMPLE(8,d)
#define ST_UNSIGNED_WORD_TO_SAMPLE(d,clips) ST_UNSIGNED_TO_SAMPLE(16,d)
#define ST_SIGNED_WORD_TO_SAMPLE(d,clips) ST_SIGNED_TO_SAMPLE(16,d)
#define ST_UNSIGNED_24BIT_TO_SAMPLE(d,clips) ST_UNSIGNED_TO_SAMPLE(24,d)
#define ST_SIGNED_24BIT_TO_SAMPLE(d,clips) ST_SIGNED_TO_SAMPLE(24,d)
#define ST_UNSIGNED_DWORD_TO_SAMPLE(d,clips) (st_sample_t)((d)^ST_SAMPLE_NEG)
#define ST_SIGNED_DWORD_TO_SAMPLE(d,clips) (st_sample_t)(d)
#define ST_FLOAT_DWORD_TO_SAMPLE ST_FLOAT_DDWORD_TO_SAMPLE
#define ST_FLOAT_DDWORD_TO_SAMPLE(d,clips) (st_macro_temp_double=d,st_macro_temp_double<-1?++(clips),(-ST_SAMPLE_MAX):st_macro_temp_double>1?++(clips),ST_SAMPLE_MAX:(st_sample_t)((uint32_t)((double)(st_macro_temp_double)*ST_SAMPLE_MAX+(ST_SAMPLE_MAX+.5))-ST_SAMPLE_MAX))
#define ST_SAMPLE_TO_UNSIGNED_BYTE(d,clips) ST_SAMPLE_TO_UNSIGNED(8,d,clips)
#define ST_SAMPLE_TO_SIGNED_BYTE(d,clips) ST_SAMPLE_TO_SIGNED(8,d,clips)
#define ST_SAMPLE_TO_UNSIGNED_WORD(d,clips) ST_SAMPLE_TO_UNSIGNED(16,d,clips)
#define ST_SAMPLE_TO_SIGNED_WORD(d,clips) ST_SAMPLE_TO_SIGNED(16,d,clips)
#define ST_SAMPLE_TO_UNSIGNED_24BIT(d,clips) ST_SAMPLE_TO_UNSIGNED(24,d,clips)
#define ST_SAMPLE_TO_SIGNED_24BIT(d,clips) ST_SAMPLE_TO_SIGNED(24,d,clips)
#define ST_SAMPLE_TO_UNSIGNED_DWORD(d,clips) (uint32_t)((d)^ST_SAMPLE_NEG)
#define ST_SAMPLE_TO_SIGNED_DWORD(d,clips) (int32_t)(d)
#define ST_SAMPLE_TO_FLOAT_DWORD ST_SAMPLE_TO_FLOAT_DDWORD
#define ST_SAMPLE_TO_FLOAT_DDWORD(d,clips) (st_macro_temp_sample=d,st_macro_temp_sample==ST_SAMPLE_MIN?++(clips),-1.0:((double)(st_macro_temp_sample)*(1.0/ST_SAMPLE_MAX)))
/* 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)
/* Rvalue MACRO to round and clip a double to a st_sample_t,
* and increment a counter if clipping occurs.
*/
#define ST_ROUND_CLIP_COUNT(d, clips) \
((d) < 0? (d) <= ST_SAMPLE_MIN - 0.5? ++(clips), ST_SAMPLE_MIN: (d) - 0.5 \
: (d) >= ST_SAMPLE_MAX + 0.5? ++(clips), ST_SAMPLE_MAX: (d) + 0.5)
/* Rvalue MACRO to clip a st_sample_t to 24 bits,
* and increment a counter if clipping occurs.
*/
#define ST_24BIT_CLIP_COUNT(l, clips) \
((l) >= ((st_sample_t)1 << 23)? ++(clips), ((st_sample_t)1 << 23) - 1 : \
(l) <=-((st_sample_t)1 << 23)? ++(clips),-((st_sample_t)1 << 23) + 1 : (l))
typedef uint32_t st_size_t;
/* Maximum value size type can hold. (Minimum is 0). */
#define ST_SIZE_MAX 0xffffffffL
typedef int32_t st_ssize_t;
/* Minimum and maximum value signed size type can hold. */
#define ST_SSIZE_MAX 0x7fffffffL
#define ST_SSIZE_MIN (-ST_SSIZE_MAX - 1L)
typedef uint32_t st_rate_t;
/* Warning, this is a MAX value used in the library. Each format and
* effect may have its own limitations of rate.
*/
#define ST_MAXRATE (50UL * 1024) /* maximum sample rate in library */
typedef enum {
ST_ENCODING_UNKNOWN ,
ST_ENCODING_UNSIGNED , /* unsigned linear: Sound Blaster */
ST_ENCODING_SIGN2 , /* signed linear 2's comp: Mac */
ST_ENCODING_ULAW , /* u-law signed logs: US telephony, SPARC */
ST_ENCODING_ALAW , /* A-law signed logs: non-US telephony */
ST_ENCODING_FLOAT , /* 32-bit float */
ST_ENCODING_ADPCM , /* Compressed PCM */
ST_ENCODING_IMA_ADPCM , /* Compressed PCM */
ST_ENCODING_GSM , /* GSM 6.10 33byte frame lossy compression */
ST_ENCODING_INV_ULAW , /* Inversed bit-order u-law */
ST_ENCODING_INV_ALAW , /* Inversed bit-order A-law */
ST_ENCODING_MP3 , /* MP3 compression */
ST_ENCODING_VORBIS , /* Vorbis compression */
ST_ENCODING_FLAC , /* FLAC compression */
ST_ENCODING_OKI_ADPCM , /* Compressed PCM */
ST_ENCODINGS /* End of list marker */
} st_encoding_t;
/* Global parameters */
typedef struct st_globalinfo
{
bool octave_plot_effect;/* To help user choose effect & options */
double speed; /* Gather up all speed changes here, then resample */
} st_globalinfo_t;
/* Signal parameters */
typedef struct st_signalinfo
{
st_rate_t rate; /* sampling rate */
signed char size; /* word length of data */
st_encoding_t encoding; /* format of sample numbers */
unsigned 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 {
const char * const *names;
const char *usage;
unsigned int flags;
int (*startread)(ft_t ft);
st_size_t (*read)(ft_t ft, st_sample_t *buf, st_size_t len);
int (*stopread)(ft_t ft);
int (*startwrite)(ft_t ft);
st_size_t (*write)(ft_t ft, const st_sample_t *buf, st_size_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 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;
st_size_t clippedCount; /* increment if clipping occurs */
char *filename; /* file name */
char *filetype; /* type of file */
char *comment; /* comment string */
FILE *fp; /* File stream pointer */
unsigned char eof; /* Marker that EOF has been reached */
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 */
#define ST_FILE_NOFEXT 32 /* does not use file extensions */
/* 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
/* declared in misc.c */
extern const char * const st_sizes_str[];
extern const char * const st_size_bits_str[];
extern const char * const 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 not affect the audio */
#define ST_EFF_NULL 16 /* Effect does nothing */
/*
* Handler structure for each effect.
*/
typedef struct st_effect *eff_t;
typedef struct
{
char const * name; /* effect name */
char const * usage;
unsigned int flags;
int (*getopts)(eff_t effp, int argc, char *argv[]);
int (*start)(eff_t effp);
int (*flow)(eff_t effp, const 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 const * name; /* effect name */
struct st_globalinfo * globalinfo;/* global ST parameters */
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 */
st_size_t clippedCount; /* increment if clipping occurs */
/* The following is a portable trick to align this variable on
* an 8-byte boundary. 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);
ft_t st_open_write(
bool (*overwrite_permitted)(const char *filename),
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_size_t st_read(ft_t ft, st_sample_t *buf, st_size_t len);
extern st_size_t st_write(ft_t ft, const st_sample_t *buf, st_size_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, const char *);
bool is_effect_name(char const * text);
int st_updateeffect(eff_t, const st_signalinfo_t *in, const st_signalinfo_t *out, int);
int st_gettype(ft_t, bool);
ft_t st_initformat(void);
char const * st_parsesamples(st_rate_t rate, const char *str, st_size_t *samples, char def);
extern char const * st_message_filename;
#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 */
/* Define fseeko and ftello for platforms lacking them */
#ifndef HAVE_FSEEKO
#define fseeko fseek
#define ftello ftell
#define off_t long
#endif
#endif