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sbagen.c
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//
// SBaGen - Sequenced Binaural Beat Generator
//
// (c) 1999-2007 Jim Peters <[email protected]>. All Rights Reserved.
// For latest version see http://sbagen.sf.net/ or
// http://uazu.net/sbagen/. Released under the GNU GPL version 2.
// Use at your own risk.
//
// " 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, version 2.
//
// 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. "
//
// See the file COPYING for details of this license.
//
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
//
// Some code fragments in the Win32 audio handling are based on
// code from PLIB (c) 2001 by Steve Baker, originally released
// under the LGPL (slDSP.cxx and sl.h). For the original source,
// see the PLIB project: http://plib.sf.net
//
// The code for the Mac audio output was based on code from the
// FINK project's patches to ESounD, by Shawn Hsiao and Masanori
// Sekino. See: http://fink.sf.net
#define VERSION "1.4.4"
// This should be built with one of the following target macros
// defined, which selects options for that platform, or else with some
// of the individual named flags #defined as listed later.
//
// T_LINUX To build the LINUX version with /dev/dsp support
// T_MINGW To build for Windows using MinGW and Win32 calls
// T_MSVC To build for Windows using MSVC and Win32 calls
// T_MACOSX To build for MacOSX using CoreAudio
// T_POSIX To build for simple file output on any Posix-compliant OS
//
// Ogg and MP3 support is handled separately from the T_* macros.
// Define OSS_AUDIO to use /dev/dsp for audio output
// Define OSS_ALSA for alsa support
// Define WIN_AUDIO to use Win32 calls
// Define MAC_AUDIO to use Mac CoreAudio calls
// Define NO_AUDIO if no audio output device is usable
// Define UNIX_TIME to use UNIX calls for getting time
// Define WIN_TIME to use Win32 calls for getting time
// Define ANSI_TTY to use ANSI sequences to clear/redraw lines
// Define UNIX_MISC to use UNIX calls for various miscellaneous things
// Define WIN_MISC to use Windows calls for various miscellaneous things
// Define EXIT_KEY to require the user to hit RETURN before exiting after error
// Define OGG_DECODE to include OGG support code
// Define MP3_DECODE to include MP3 support code
#ifdef T_LINUX
#define OSS_AUDIO
#define UNIX_TIME
#define UNIX_MISC
#define ANSI_TTY
#endif
#ifdef T_LINUX_ALSA
#define ALSA_AUDIO
#define UNIX_TIME
#define UNIX_MISC
#define ANSI_TTY
#endif
#ifdef T_MINGW
#define WIN_AUDIO
#define WIN_TIME
#define WIN_MISC
#define EXIT_KEY
#endif
#ifdef T_MSVC
#define WIN_AUDIO
#define WIN_TIME
#define WIN_MISC
#define EXIT_KEY
#endif
#ifdef T_MACOSX
#define MAC_AUDIO
#define UNIX_TIME
#define UNIX_MISC
#define ANSI_TTY
#endif
#ifdef T_POSIX
#define NO_AUDIO
#define UNIX_TIME
#define UNIX_MISC
#endif
// Make sure NO_AUDIO is set if necessary
#ifndef OSS_AUDIO
#ifndef ALSA_AUDIO
#ifndef MAC_AUDIO
#ifndef WIN_AUDIO
#define NO_AUDIO
#endif
#endif
#endif
#endif
// Make sure one of the _TIME macros is set
#ifndef UNIX_TIME
#ifndef WIN_TIME
#error UNIX_TIME or WIN_TIME not defined. Maybe you did not define one of T_LINUX/T_MINGW/T_MACOSX/etc ?
#endif
#endif
// Make sure one of the _MISC macros is set
#ifndef UNIX_MISC
#ifndef WIN_MISC
#error UNIX_MISC or WIN_MISC not defined. Maybe you did not define one of T_LINUX/T_MINGW/T_MACOSX/etc ?
#endif
#endif
#include <stdio.h>
#include <math.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <ctype.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <time.h>
#ifdef T_MSVC
#include <io.h>
#define write _write
#define vsnprintf _vsnprintf
typedef long long S64; // I have no idea if this is correct for MSVC
#else
#include <unistd.h>
#include <sys/time.h>
typedef long long S64;
#endif
#ifdef T_MINGW
#define vsnprintf _vsnprintf
#endif
#ifdef ALSA_AUDIO
#include <alsa/asoundlib.h>
#endif
#ifdef OSS_AUDIO
#include <linux/soundcard.h>
//WAS: #include <sys/soundcard.h>
#endif
#ifdef WIN_AUDIO
#include <windows.h>
#include <mmsystem.h>
#endif
#ifdef MAC_AUDIO
#include <Carbon.h>
#include <CoreAudio/CoreAudio.h>
#endif
#ifdef UNIX_TIME
#include <sys/ioctl.h>
#include <sys/times.h>
#endif
#ifdef UNIX_MISC
#include <pthread.h>
#endif
typedef struct Channel Channel;
typedef struct Voice Voice;
typedef struct Period Period;
typedef struct NameDef NameDef;
typedef struct BlockDef BlockDef;
typedef unsigned char uchar;
int inbuf_loop(void *vp) ;
int inbuf_read(int *dst, int dlen) ;
void inbuf_start(int(*rout)(int*,int), int len) ;
inline int t_per24(int t0, int t1) ;
inline int t_per0(int t0, int t1) ;
inline int t_mid(int t0, int t1) ;
int main(int argc, char **argv) ;
void status(char *) ;
void dispCurrPer( FILE* ) ;
void init_sin_table() ;
void debug(char *fmt, ...) ;
void warn(char *fmt, ...) ;
void * Alloc(size_t len) ;
char * StrDup(char *str) ;
inline int calcNow() ;
void loop() ;
void outChunk() ;
void corrVal(int ) ;
int readLine() ;
char * getWord() ;
void badSeq() ;
void readSeqImm(int ac, char **av) ;
void readSeq(int ac, char **av) ;
void readPreProg(int ac, char **av) ;
void correctPeriods();
void setup_device(void) ;
void readNameDef();
void readTimeLine();
int voicesEq(Voice *, Voice *);
void error(char *fmt, ...) ;
int sprintTime(char *, int);
int sprintVoice(char *, Voice *, Voice *);
int readTime(char *, int *);
void writeWAV();
void writeOut(char *, int);
void sinc_interpolate(double *, int, int *);
inline int userTime();
void find_wav_data_start(FILE *in);
int raw_mix_in(int *dst, int dlen);
int scanOptions(int *acp, char ***avp);
void handleOptions(char *p);
void setupOptC(char *spec) ;
extern int out_rate, out_rate_def;
void create_drop(int ac, char **av);
void create_slide(int ac, char **av);
#define ALLOC_ARR(cnt, type) ((type*)Alloc((cnt) * sizeof(type)))
#define uint unsigned int
#ifdef OGG_DECODE
#include "oggdec.c"
#endif
#ifdef MP3_DECODE
#include "mp3dec.c"
#endif
#ifdef WIN_AUDIO
void CALLBACK win32_audio_callback(HWAVEOUT, UINT, DWORD, DWORD, DWORD);
#endif
#ifdef MAC_AUDIO
OSStatus mac_callback(AudioDeviceID, const AudioTimeStamp *, const AudioBufferList *,
const AudioTimeStamp *, AudioBufferList *, const AudioTimeStamp *,
void *inClientData);
#endif
#define NL "\n"
void
help() {
printf("SBaGen - Sequenced Binaural Beat Generator, version " VERSION
NL "Copyright (c) 1999-2007 Jim Peters, http://uazu.net/, all rights "
NL " reserved, released under the GNU GPL v2. See file COPYING."
NL
NL "Usage: sbagen [options] seq-file ..."
NL " sbagen [options] -i tone-specs ..."
NL " sbagen [options] -p pre-programmed-sequence-specs ..."
NL
NL "Options: -h Display this help-text"
NL " -Q Quiet - don't display running status"
NL " -D Display the full interpreted sequence instead of playing it"
NL " -i Immediate. Take the remainder of the command line to be"
NL " tone-specifications, and play them continuously"
NL " -p Pre-programmed sequence. Take the remainder of the command"
NL " line to be a type and arguments, e.g. \"drop 00ds+\""
NL " -q mult Quick. Run through quickly (real time x 'mult') from the"
NL " start time, rather than wait for real time to pass"
NL
NL " -r rate Select the output rate (default is 44100 Hz, or from -m)"
#ifndef MAC_AUDIO
NL " -b bits Select the number bits for output (8 or 16, default 16)"
#endif
NL " -L time Select the length of time (hh:mm or hh:mm:ss) to output"
NL " for. Default is to output forever."
NL " -S Output from the first tone-set in the sequence (Start),"
NL " instead of working in real-time. Equivalent to '-q 1'."
NL " -E Output until the last tone-set in the sequence (End),"
NL " instead of outputting forever."
NL " -T time Start at the given clock-time (hh:mm)"
NL
NL " -o file Output raw data to the given file instead of /dev/dsp"
NL " -O Output raw data to the standard output"
NL " -W Output a WAV-format file instead of raw data"
NL " -m file Read audio data from the given file and mix it with the"
NL " generated binaural beats; may be "
#ifdef OGG_DECODE
"ogg/"
#endif
#ifdef MP3_DECODE
"mp3/"
#endif
"wav/raw format"
NL " -M Read raw audio data from the standard input and mix it"
NL " with the generated binaural beats (raw only)"
NL
NL " -R rate Select rate in Hz that frequency changes are recalculated"
NL " (for file/pipe output only, default is 10Hz)"
NL " -F fms Fade in/out time in ms (default 60000ms, or 1min)"
#ifdef OSS_AUDIO
NL " -d dev Select a different output device instead of /dev/dsp"
#endif
#ifdef ALSA_AUDIO
NL " -d dev Select a different output device instead of default"
#endif
NL " -c spec Compensate for low-frequency headphone roll-off; see docs"
NL
);
exit(0);
}
void
usage() {
error("SBaGen - Sequenced Binaural Beat Generator, version " VERSION
NL "Copyright (c) 1999-2007 Jim Peters, http://uazu.net/, all rights "
NL " reserved, released under the GNU GPL v2. See file COPYING."
NL
NL "Usage: sbagen [options] seq-file ..."
NL " sbagen [options] -i tone-specs ..."
NL " sbagen [options] -p pre-programmed-sequence-specs ..."
NL
NL "For full usage help, type 'sbagen -h'. For latest version see"
NL "http://uazu.net/sbagen/ or http://sbagen.sf.net/"
#ifdef EXIT_KEY
NL
NL "Windows users please note that this utility is designed to be run as the"
NL "associated application for SBG files. This should have been set up for you by"
NL "the installer. You can run all the SBG files directly from the desktop by"
NL "double-clicking on them, and edit them using NotePad from the right-click menu."
NL "Alternatively, SBaGen may be run from the MS-DOS prompt (CMD on WinXP), or from"
NL "BAT files. SBaGen is powerful software -- it is worth the effort of figuring"
NL "all this out. See SBAGEN.TXT for the full documentation."
NL
NL "Editing the SBG files gives you access to the full tweakable power of SBaGen, "
NL "but if you want a simple GUI interface to the most basic features, you could "
NL "look at a user-contributed tool called SBaGUI:"
NL
NL " http://sbagen.opensrc.org/wiki.php?page=SBaGUI"
#endif
NL);
}
#define DEBUG_CHK_UTIME 0 // Check how much user time is being consumed
#define DEBUG_DUMP_WAVES 0 // Dump out wave tables (to plot with gnuplot)
#define DEBUG_DUMP_AMP 0 // Dump output amplitude to stdout per chunk
#define N_CH 16 // Number of channels
struct Voice {
int typ; // Voice type: 0 off, 1 binaural, 2 pink noise, 3 bell, 4 spin,
// 5 mix, 6 mixspin, 7 mixbeat, -1 to -100 wave00 to wave99
double amp; // Amplitude level (0-4096 for 0-100%)
double carr; // Carrier freq (for binaural/bell), width (for spin)
double res; // Resonance freq (-ve or +ve) (for binaural/spin)
};
struct Channel {
Voice v; // Current voice setting (updated from current period)
int typ; // Current type: 0 off, 1 binaural, 2 pink noise, 3 bell, 4 spin,
// 5 mix, 6 mixspin, 7 mixbeat, -1 to -100 wave00 to wave99
int amp, amp2; // Current state, according to current type
int inc1, off1; // :: (for binaural tones, offset + increment into sine
int inc2, off2; // :: table * 65536)
};
struct Period {
Period *nxt, *prv; // Next/prev in chain
int tim; // Start time (end time is ->nxt->tim)
Voice v0[N_CH], v1[N_CH]; // Start and end voices
int fi, fo; // Temporary: Fade-in, fade-out modes
};
struct NameDef {
NameDef *nxt;
char *name; // Name of definition
BlockDef *blk; // Non-zero for block definition
Voice vv[N_CH]; // Voice-set for it (unless a block definition)
};
struct BlockDef {
BlockDef *nxt; // Next in chain
char *lin; // StrDup'd line
};
#define ST_AMP 0x7FFFF // Amplitude of wave in sine-table
#define NS_ADJ 12 // Noise is generated internally with amplitude ST_AMP<<NS_ADJ
#define NS_DITHER 16 // How many bits right to shift the noise for dithering
#define NS_AMP (ST_AMP<<NS_ADJ)
#define ST_SIZ 16384 // Number of elements in sine-table (power of 2)
int *sin_table;
#define AMP_DA(pc) (40.96 * (pc)) // Display value (%age) to ->amp value
#define AMP_AD(amp) ((amp) / 40.96) // Amplitude value to display %age
int *waves[100]; // Pointers are either 0 or point to a sin_table[]-style array of int
Channel chan[N_CH]; // Current channel states
int now; // Current time (milliseconds from midnight)
Period *per= 0; // Current period
NameDef *nlist; // Full list of name definitions
int *tmp_buf; // Temporary buffer for 20-bit mix values
short *out_buf; // Output buffer
int out_bsiz; // Output buffer size (bytes)
int out_blen; // Output buffer length (samples) (1.0* or 0.5* out_bsiz)
int out_bps; // Output bytes per sample (2 or 4)
int out_buf_ms; // Time to output a buffer-ful in ms
int out_buf_lo; // Time to output a buffer-ful, fine-tuning in ms/0x10000
int out_fd; // Output file descriptor
int out_rate= 44100; // Sample rate
int out_rate_def= 1; // Sample rate is default value, not set by user
int out_mode= 1; // Output mode: 0 unsigned char[2], 1 short[2], 2 swapped short[2]
int out_prate= 10; // Rate of parameter change (for file and pipe output only)
int fade_int= 60000; // Fade interval (ms)
FILE *in; // Input sequence file
int in_lin; // Current input line
char buf[4096]; // Buffer for current line
char buf_copy[4096]; // Used to keep unmodified copy of line
char *lin; // Input line (uses buf[])
char *lin_copy; // Copy of input line
double spin_carr_max; // Maximum 'carrier' value for spin (really max width in us)
#define NS_BIT 10
int ns_tbl[1<<NS_BIT];
int ns_off= 0;
int fast_tim0= -1; // First time mentioned in the sequence file (for -q and -S option)
int fast_tim1= -1; // Last time mentioned in the sequence file (for -E option)
int fast_mult= 0; // 0 to sync to clock (adjusting as necessary), or else sync to
// output rate, with the multiplier indicated
S64 byte_count= -1; // Number of bytes left to output, or -1 if unlimited
int tty_erase; // Chars to erase from current line (for ESC[K emulation)
int opt_D;
int opt_M;
int opt_Q;
int opt_S;
int opt_E;
int opt_W;
int opt_O;
int opt_L= -1; // Length in ms, or -1
int opt_T= -1; // Start time in ms, or -1
char *opt_o; // File name to output to, or 0
char *opt_m; // File name to read mix data from, or 0
#ifdef ALSA_AUDIO
char *opt_d= "default"; // Output device
#else
char *opt_d= "/dev/dsp"; // Output device
#endif
FILE *mix_in; // Input stream for mix sound data, or 0
int mix_cnt; // Version number from mix filename (#<digits>), or -1
int bigendian; // Is this platform Big-endian?
int mix_flag= 0; // Has 'mix/*' been used in the sequence?
int opt_c; // Number of -c option points provided (max 16)
struct AmpAdj {
double freq, adj;
} ampadj[16]; // List of maximum 16 (freq,adj) pairs, freq-increasing order
char *pdir; // Program directory (used as second place to look for -m files)
#ifdef WIN_AUDIO
#define BUFFER_COUNT 8
#define BUFFER_SIZE 8192*4
HWAVEOUT aud_handle;
WAVEHDR *aud_head[BUFFER_COUNT];
int aud_current; // Current header
int aud_cnt; // Number of headers in use
#endif
#ifdef MAC_AUDIO
#define BUFFER_COUNT 8
#define BUFFER_SIZE 4096*4
char aud_buf[BUFFER_COUNT][BUFFER_SIZE];
int aud_rd; // Next buffer to read out of list (to send to device)
int aud_wr; // Next buffer to write. aud_rd==aud_wr means empty buffer list
static AudioDeviceID aud_dev;
#endif
#ifdef ALSA_AUDIO
snd_pcm_t *playback_handle;
#endif
//
// Delay for a short period of time (in ms)
//
#ifdef UNIX_MISC
void
delay(int ms) {
struct timespec ts;
ts.tv_sec= ms / 1000;
ts.tv_nsec= (ms % 1000) * 1000000;
nanosleep(&ts, 0);
}
#endif
#ifdef WIN_MISC
void
delay(int ms) {
Sleep(ms);
}
#endif
//
// WAV/OGG/MP3 input data buffering
//
int *inbuf; // Buffer for input data (as 20-bit samples)
int ib_len; // Length of input buffer (in ints)
volatile int ib_rd; // Read-offset in inbuf
volatile int ib_wr; // Write-offset in inbuf
volatile int ib_eof; // End of file flag
int ib_cycle= 100; // Time in ms for a complete loop through the buffer
int (*ib_read)(int*,int); // Routine to refill buffer
int
inbuf_loop(void *vp) {
int now= -1;
int waited= 0; // Used to bail out if the main thread dies for some reason
int a;
while (1) {
int rv;
int rd= ib_rd;
int wr= ib_wr;
int cnt= (rd-1-wr) & (ib_len-1);
if (cnt > ib_len-wr) cnt= ib_len-wr;
if (cnt > ib_len/8) cnt= ib_len/8;
// Choose to only work in ib_len/8 units, although this is not
// 100% necessary
if (cnt < ib_len/8) {
// Wait a little while for the buffer to empty (minimum 1ms)
if (waited > 10000 + ib_cycle)
error("Mix stream halted for more than 10 seconds; aborting");
delay(a= 1+ib_cycle/4);
waited += a;
continue;
}
waited= 0;
rv= ib_read(inbuf+wr, cnt);
//debug("ib_read %d-%d (%d) -> %d", wr, wr+cnt-1, cnt, rv);
if (rv != cnt) {
ib_eof= 1;
return 0;
}
ib_wr= (wr + rv) & (ib_len-1);
// Whenever we roll over, recalculate 'ib_cycle'
if (ib_wr < wr) {
int prev= now;
now= calcNow();
if (prev >= 0 && now > prev)
ib_cycle= now - prev;
//debug("Input buffer cycle duration is now %dms", ib_cycle);
}
}
return 0;
}
//
// Read a chunk of int data from the input buffer. This will
// always return enough data unless we have hit the end of the
// file, in which case it returns a lower number or 0. If not
// enough data has been read by the input thread, then this
// thread pauses until data is ready -- but this should hopefully
// never happen.
//
int
inbuf_read(int *dst, int dlen) {
int rv= 0;
int waited= 0; // As a precaution, bail out if other thread hangs for some reason
int a;
while (dlen > 0) {
int rd= ib_rd;
int wr= ib_wr;
int avail= (wr-rd) & (ib_len-1);
int toend= ib_len-rd;
if (avail > toend) avail= toend;
if (avail > dlen) avail= dlen;
if (avail == 0) {
if (ib_eof) return rv;
// Necessary to wait for incoming mix data. This should
// never happen in normal running, though, unless we are
// outputting to a file
if (waited > 10000)
error("Mix stream problem; waited more than 10 seconds for data; aborting");
//debug("Waiting for input thread (%d)", ib_eof);
delay(a= ib_cycle/4 > 100 ? 100 : 1+ib_cycle/4);
waited += a;
continue;
}
waited= 0;
memcpy(dst, inbuf+rd, avail * sizeof(int));
dst += avail;
dlen -= avail;
rv += avail;
ib_rd= (rd + avail) & (ib_len-1);
}
return rv;
}
//
// Start off the thread that fills the buffer
//
void
inbuf_start(int(*rout)(int*,int), int len) {
if (0 != (len & (len-1)))
error("inbuf_start() called with length not a power of two");
ib_read= rout;
ib_len= len;
inbuf= ALLOC_ARR(ib_len, int);
ib_rd= 0;
ib_wr= 0;
ib_eof= 0;
if (!opt_Q) warn("Initialising %d-sample buffer for mix stream", ib_len/2);
// Preload 75% of the buffer -- or at least attempt to do so;
// errors/eof/etc will be picked up in the inbuf_loop() routine
ib_wr= ib_read(inbuf, ib_len*3/4);
// Start the thread off
#ifdef UNIX_MISC
{
pthread_t thread;
if (0 != pthread_create(&thread, NULL, (void*)&inbuf_loop, NULL))
error("Failed to start input buffering thread");
}
#endif
#ifdef WIN_MISC
{
DWORD tmp;
if (0 == CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)&inbuf_loop, 0, 0, &tmp))
error("Failed to start input buffering thread");
}
#endif
}
//
// Time-keeping functions
//
#define H24 (86400000) // 24 hours
#define H12 (43200000) // 12 hours
inline int t_per24(int t0, int t1) { // Length of period starting at t0, ending at t1.
int td= t1 - t0; // NB for t0==t1 this gives 24 hours, *NOT 0*
return td > 0 ? td : td + H24;
}
inline int t_per0(int t0, int t1) { // Length of period starting at t0, ending at t1.
int td= t1 - t0; // NB for t0==t1 this gives 0 hours
return td >= 0 ? td : td + H24;
}
inline int t_mid(int t0, int t1) { // Midpoint of period from t0 to t1
return ((t1 < t0) ? (H24 + t0 + t1) / 2 : (t0 + t1) / 2) % H24;
}
//
// M A I N
//
int
main(int argc, char **argv) {
short test= 0x1100;
int rv;
char *p;
pdir= StrDup(argv[0]);
p= strchr(pdir, 0);
while (p > pdir && p[-1] != '/' && p[-1] != '\\') *--p= 0;
argc--; argv++;
init_sin_table();
bigendian= ((char*)&test)[0] != 0;
// Process all the options
rv= scanOptions(&argc, &argv);
if (argc < 1) usage();
if (rv == 'i') {
// Immediate mode
readSeqImm(argc, argv);
} else if (rv == 'p') {
// Pre-programmed sequence
readPreProg(argc, argv);
} else {
// Sequenced mode -- sequence may include options, so options
// are not settled until below this point
if (argc < 1) usage();
readSeq(argc, argv);
}
if (opt_W && !opt_o && !opt_O)
error("Use -o or -O with the -W option");
if (opt_W && opt_L < 0 && !opt_E) {
fprintf(stderr, "*** The length has not been specified for the -W option; assuming 1 hour ***\n");
fprintf(stderr, "(Use -L or -E with the -W option to control the length of the WAV file)\n\n");
opt_L= 60*60*1000;
}
mix_in= 0;
if (opt_M || opt_m) {
char *p;
char tmp[4];
int raw= 1;
if (opt_M) {
mix_in= stdin;
tmp[0]= 0;
}
if (opt_m) {
// Pick up #<digits> on end of filename
p= strchr(opt_m, 0);
mix_cnt= -1;
if (p > opt_m && isdigit(p[-1])) {
mix_cnt= 0;
while (p > opt_m && isdigit(p[-1]))
mix_cnt= mix_cnt * 10 + *--p - '0';
if (p > opt_m && p[-1] == '#')
*--p= 0;
else {
p= strchr(opt_m, 0);
mix_cnt= -1;
}
}
// p points to end of filename (NUL)
// Open file
mix_in= fopen(opt_m, "rb");
if (!mix_in && opt_m[0] != '/') {
int len= strlen(opt_m) + strlen(pdir) + 1;
char *tmp= ALLOC_ARR(len, char);
strcpy(tmp, pdir);
strcat(tmp, opt_m);
mix_in= fopen(tmp, "rb");
free(tmp);
}
if (!mix_in)
error("Can't open -m option mix input file: %s", opt_m);
// Pick up extension
if (p-opt_m >= 4 && p[-4] == '.') {
tmp[0]= tolower(p[-3]);
tmp[1]= tolower(p[-2]);
tmp[2]= tolower(p[-1]);
tmp[3]= 0;
}
}
if (0 == strcmp(tmp, "wav")) // Skip header on WAV files
find_wav_data_start(mix_in);
if (0 == strcmp(tmp, "ogg")) {
#ifdef OGG_DECODE
ogg_init(); raw= 0;
#else
error("Sorry: Ogg support wasn't compiled into this executable");
#endif
}
if (0 == strcmp(tmp, "mp3")) {
#ifdef MP3_DECODE
mp3_init(); raw= 0;
#else
error("Sorry: MP3 support wasn't compiled into this executable");
#endif
}
// If this is a raw/wav data stream, setup a 256*1024-int
// buffer ([email protected])
if (raw) inbuf_start(raw_mix_in, 256*1024);
}
loop();
return 0;
}
//
// Scan options. Returns a flag indicating what is expected to
// interpret the rest of the arguments: 0 normal, 'i' immediate
// (-i option), 'p' -p option.
//
int
scanOptions(int *acp, char ***avp) {
int argc= *acp;
char **argv= *avp;
int val;
char dmy;
int rv= 0;
// Scan options
while (argc > 0 && argv[0][0] == '-' && argv[0][1]) {
char opt, *p= 1 + *argv++; argc--;
while ((opt= *p++)) {
// Check options that are available on both
switch (opt) {
case 'Q': opt_Q= 1; break;
case 'E': opt_E= 1; break;
case 'm':
if (argc-- < 1) error("-m option expects filename");
// Earliest takes precedence, so command-line overrides sequence file
if (!opt_m) opt_m= *argv++;
break;
case 'S': opt_S= 1;
if (!fast_mult) fast_mult= 1; // Don't try to sync with real time
break;
case 'L':
if (argc-- < 1 || 0 == (val= readTime(*argv, &opt_L)) ||
1 == sscanf(*argv++ + val, " %c", &dmy))
error("-L expects hh:mm or hh:mm:ss time");
break;
case 'T':
if (argc-- < 1 || 0 == (val= readTime(*argv, &opt_T)) ||
1 == sscanf(*argv++ + val, " %c", &dmy))
error("-T expects hh:mm or hh:mm:ss time");
if (!fast_mult) fast_mult= 1; // Don't try to sync with real time
break;
case 'F':
if (argc-- < 1 || 1 != sscanf(*argv++, "%d %c", &fade_int, &dmy))
error("-F expects fade-time in ms");
break;
case 'c':
if (argc-- < 1) error("-c expects argument");
setupOptC(*argv++);
break;
case 'i': rv= 'i'; break;
case 'p': rv= 'p'; break;
case 'h': help(); break;
case 'D': opt_D= 1; break;
case 'M': opt_M= 1; break;
case 'O': opt_O= 1;
if (!fast_mult) fast_mult= 1; // Don't try to sync with real time
break;
case 'W': opt_W= 1;
if (!fast_mult) fast_mult= 1; // Don't try to sync with real time
break;
case 'q':
opt_S= 1;
if (argc-- < 1 || 1 != sscanf(*argv++, "%d %c", &fast_mult, &dmy))
error("Expecting an integer after -q");
if (fast_mult < 1) fast_mult= 1;
break;
case 'r':
if (argc-- < 1 || 1 != sscanf(*argv++, "%d %c", &out_rate, &dmy))
error("Expecting an integer after -r");
out_rate_def= 0;
break;
#ifndef MAC_AUDIO
case 'b':
if (argc-- < 1 ||
1 != sscanf(*argv++, "%d %c", &val, &dmy) ||
!(val == 8 || val == 16))
error("Expecting -b 8 or -b 16");
out_mode= (val == 8) ? 0 : 1;
break;
#endif
case 'o':
if (argc-- < 1) error("Expecting filename after -o");
opt_o= *argv++;
if (!fast_mult) fast_mult= 1; // Don't try to sync with real time
break;
#ifdef OSS_AUDIO
case 'd':
if (argc-- < 1) error("Expecting device filename after -d");
opt_d= *argv++;
break;
#endif
#ifdef ALSA_AUDIO
case 'd':
if (argc-- < 1) error("Expecting device filename after -d");
opt_d= *argv++;
break;
#endif
case 'R':
if (argc-- < 1 || 1 != sscanf(*argv++, "%d %c", &out_prate, &dmy))
error("Expecting integer after -R");
break;
default:
error("Option -%c not known; run 'sbagen -h' for help", opt);
}
}
}
*acp= argc;
*avp= argv;
return rv;
}
//
// Handle an option string, breaking it into an (argc/argv) list
// for scanOptions.
//
void
handleOptions(char *str0) {
// Always StrDup() string and don't bother to free(), as normal
// argv[] strings stick around for the life of the program
char *str= StrDup(str0);
int const max_argc= 32;
char *argv[max_argc+1];
int argc= 0;
while (*str) {
if (argc >= max_argc)
error("Too many options at line: %d\n %s", in_lin, lin_copy);
argv[argc++]= str;
while (*str && !isspace(*str)) str++;
if (!*str) continue;
*str++= 0; // NUL-term this word
while (isspace(*str)) str++;
}
argv[argc]= 0; // Terminate argv list with a NULL
// Process the options
{
char **av= argv;
int ac= argc;
int rv;
rv= scanOptions(&ac, &av);
if (rv == 'i') {
// Immediate mode
readSeqImm(ac, av);
} else if (rv == 'p') {
// Pre-programmed sequence
readPreProg(ac, av);
} else if (ac)
error("Trailing garbage after options at line: %d\n %s", in_lin, lin_copy);
}
}
//
// Setup the ampadj[] array from the given -c spec-string
//
void
setupOptC(char *spec) {
char *p= spec, *q;
int a, b;
while (1) {
while (isspace(*p) || *p == ',') p++;
if (!*p) break;
if (opt_c >= sizeof(ampadj) / sizeof(ampadj[0]))
error("Too many -c option frequencies; maxmimum is %d",
sizeof(ampadj) / sizeof(ampadj[0]));
ampadj[opt_c].freq= strtod(p, &q);
if (p == q) goto bad;
if (*q++ != '=') goto bad;
ampadj[opt_c].adj= strtod(q, &p);
if (p == q) goto bad;
opt_c++;
}
// Sort the list
for (a= 0; a<opt_c; a++)
for (b= a+1; b<opt_c; b++)
if (ampadj[a].freq > ampadj[b].freq) {
double tmp;
tmp= ampadj[a].freq; ampadj[a].freq= ampadj[b].freq; ampadj[b].freq= tmp;
tmp= ampadj[a].adj; ampadj[a].adj= ampadj[b].adj; ampadj[b].adj= tmp;
}
return;
bad:
error("Bad -c option spec; expecting <freq>=<amp>[,<freq>=<amp>]...:\n %s", spec);
}
//
// If this is a WAV file we've been given, skip forward to the
// 'data' section. Don't bother checking any of the 'fmt '
// stuff. If they didn't give us a valid 16-bit stereo file at
// the right rate, then tough!
//
void
find_wav_data_start(FILE *in) {
unsigned char buf[16];
if (1 != fread(buf, 12, 1, in)) goto bad;
if (0 != memcmp(buf, "RIFF", 4)) goto bad;
if (0 != memcmp(buf+8, "WAVE", 4)) goto bad;
while (1) {
int len;
if (1 != fread(buf, 8, 1, in)) goto bad;
if (0 == memcmp(buf, "data", 4)) return; // We're in the right place!
len= buf[4] + (buf[5]<<8) + (buf[6]<<16) + (buf[7]<<24);
if (len & 1) len++;
if (out_rate_def && 0 == memcmp(buf, "fmt ", 4)) {