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ebook2cw.c
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/*
ebook2cw - converts an ebook to Morse MP3/OGG-files
Copyright (C) 2007 - 2023 Fabian Kurz, DJ5CW
https://fkurz.net/ham/ebook2cw.html
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; either version 2 of the License, or (at your option) any later
version.
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.
You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 51 Franklin
Street, Fifth Floor, Boston, MA 02110-1301, USA.
source code looks properly indented with ts=4
*/
#ifdef LAME
#include <lame/lame.h>
#endif
#ifdef OGGV
#include <vorbis/vorbisenc.h>
#endif
#include <math.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <ctype.h>
#include <time.h>
#if !__MINGW32__
#include <locale.h> /* For GNU gettext */
#include <libintl.h>
#define _(String) gettext (String)
#define gettext_noop(String) String
#define N_(String) gettext_noop (String)
#else
#define _(String) (String)
#endif
#ifndef CGI
#include <signal.h> /* Ctrl-C handling with signalhandler() */
#include <setjmp.h> /* longjmp */
#endif
/* for mkdir, not used on Windows */
#if !__MINGW32__
#include <sys/stat.h>
#include <sys/types.h>
#include <errno.h>
#endif
#include <limits.h> /* PATH_MAX */
#ifndef PATH_MAX /* Not defined e.g. on GNU/hurd */
#define PATH_MAX 4096
#endif
#include "codetables.h"
#ifndef VERSION
#define VERSION "0.0.0"
#endif
#define PCMBUFFER 1048576 /* 90 seconds at 11kHz, for one word. plenty. */
#define NOISEBUFFER 1048576 /* 90 seconds at 11kHz, for one word. plenty. */
#define MP3BUFFER 1310720 /* abt 1.25*PCMBUFFER + 7200, as recommended */
#define ISO8859 0
#define UTF8 1
#define MP3 0
#define OGG 1
#define NOENC 2
#define SINE 0
#define SAWTOOTH 1
#define SQUARE 2
#define NOISEAMPLITUDE (10000.0)
#define CWAMPLITUDE (20000.0)
#ifdef LAME
/* Global for LAME */
lame_global_flags *gfp;
#endif
#ifdef OGGV
/* Globals for OGG/Vorbis */
ogg_stream_state os;
ogg_page og;
ogg_packet op;
vorbis_info vi;
vorbis_comment vc;
vorbis_dsp_state vd;
vorbis_block vb;
#endif
#ifndef CGI
/* Globals for longjmp */
static jmp_buf jmp;
#endif
/* Struct CWP to keep all CW parameters */
typedef struct {
/* CW parameters */
int wpm, /* speed, words per minute */
freq, /* audio frequency in Hz */
rt, /* risetime, in samples */
ft, /* falltime, in samples */
qrq, /* increase speed each qrq minutes */
reset, /* reset qrq each chapter? */
farnsworth, /* effective, farnsworth speed */
pBT, /* sent <BT> for each paragraph? */
waveform, /* waveform, sine(1), sawtooth(2), square(3) */
original_wpm, /* starting speed; if qrq is used */
wordspace, /* wordspace in samples, depends on Farnsworth*/
letterspace; /* inter-letter space */
float ews; /* extra word space */
/* Noise parameters */
int bandpassbw, /* Noise filter bandwidth */
bandpassfc, /* f_center of the bandpass */
addnoise, /* 1 if noise should be added, 0 if not */
snr; /* SNR of the CW with the noise */
/* mp3/ogg encoder parameters, buffers */
int encoder;
int samplerate,
brate,
quality;
int inpcm_size,
mp3buffer_size,
noisebuf_size,
ditlen, /* normal dit length in samples */
fditlen, /* farnsworth ditlen in samples */
maxbytes; /* max bytes of a 'dah' */
short int *dit_buf,
*dah_buf,
*inpcm,
*noisebuf;
unsigned char *mp3buffer;
/* Chapter splitting */
char chapterstr[80], /* split chapters by this string */
chapterfilename[PATH_MAX-8], /* Prefix, e.g. "Chapter-" */
outfilename[PATH_MAX]; /* Full name of current outputfile */
/* time based splitting, seconds */
int chaptertime;
/* word based splitting */
int chapterwords;
/* encoding and mapping */
int encoding, /* ISO8859 or UTF8 */
use_isomapping,
use_utf8mapping;
char isomapindex[256]; /* contains the chars to be mapped */
int utf8mapindex[256]; /* for utf8 as decimal code */
char isomap[256][4]; /* by these strings */
char utf8map[256][8];
int comment; /* status for comments (which will not
be translated to CW), 0 = off, 1 = on,
2 = off after next word */
/* Line of input file; position (byte) within the line */
int linecount;
int linepos;
char configfile[2048];
char id3_author[80],
id3_title[80],
id3_comment[80],
id3_year[5];
FILE *outfile;
unsigned int outfile_length;
} CWP;
/* functions */
void init_cw (CWP *cw);
void init_cwp (CWP *cw);
void init_encoder (CWP *cw);
void encode_buffer (int length, CWP *cw);
void ogg_encode_and_write (CWP *cw);
void flush_ogg (CWP *cw);
void help (void);
void showcodes (int i);
int makeword(char * text, CWP *cw);
void closefile (int letter, int chw, int chms, CWP *cw);
void openfile (int chapter, CWP *cw);
void buf_alloc (CWP *cw);
void buf_check (int j, CWP *cw);
void command (char * cmd, CWP *cw);
void readconfig (CWP *cw);
int install_config_files (char *homedir, CWP *cw);
void setparameter (char p, char * value, CWP *cw);
void loadmapping(char *filename, int enc, CWP *cw);
char *mapstring (char *string, CWP *cw);
void addnoise (int length, CWP *cw);
float snramplitude (int snr);
void fillnoisebuffer (short int *buf, int size, float amplitude);
void filterloop (short int *buf, int l, int b);
void scalebuffer(short int *buf, int length, float factor);
void addbuffer (short int *b1, short int *b2, int l);
char *timestring (int ms);
void guessencoding (char *filename);
void add_silence (int ms, CWP *cw);
#ifndef CGI
void signalhandler(int signal);
#endif
#ifdef CGI
int hexit (char c);
void urldecode(char *buf);
#endif
/* main */
int main (int argc, char** argv) {
int pos, i, c, tmp;
char word[1024]=""; /* will be cut when > 1024 chars long */
int chapter = 0;
int download = 0; /* CGI: Send content-disposition header? */
int chw = 0, tw = 0; /* chapter words, total words */
int chms = 0, tms = 0, qms = 0; /* millisec: chapter, total, since qrq */
time_t start_time, end_time; /* conversion time */
int finishchapter = 0; /* finish chapter after this sentence */
int interactive = 0; /* 0 for pipe/file input, 1 for tty */
FILE *infile;
#ifdef CGI
char *querystring;
static char text[10000];
static char cgi_outfilename[1024];
#endif
#ifdef CGIBUFFERED
char *cgibuf;
#endif
/* initializing the CW parameter struct with standard values */
CWP cw;
init_cwp(&cw);
infile = stdin;
start_time = time(NULL);
srand((unsigned int) start_time);
#if !__MINGW32__
/* Native Language Support by GNU gettext */
setlocale(LC_ALL, "" );
bindtextdomain( "ebook2cw", "/usr/share/locale" );
textdomain("ebook2cw");
#endif
#ifndef CGI
/* Signal handling for Ctrl-C -- Does not work on Win32 because
* SIGINT is not supported on that platform. There, the signal
* handler will be called but then the program terminates. */
if (signal(SIGINT, signalhandler) == SIG_ERR) {
fprintf(stderr, _("Failed to set up signal handler for SIGINT\n"));
return EXIT_FAILURE;
}
printf(_("ebook2cw %s - (c) 2007 - 2023 by Fabian Kurz, DJ5CW\n\n"), VERSION);
/*
* Find and read ebook2cw.conf
*/
readconfig(&cw);
while((i=getopt(argc,argv, "XOo:w:W:e:f:uc:k:Q:R:pF:s:b:q:a:t:y:S:hnT:N:B:C:g:d:l:E:"))!= -1){
setparameter(i, optarg, &cw);
}
if (optind < argc) { /* something left? if so, use as infile */
if ((argv[optind][0] != '-') && (argv[optind][0] != '\0')) {
if ((infile = fopen(argv[optind], "r")) == NULL) {
fprintf(stderr, _("Error: Cannot open file %s. Exit.\n"),
argv[optind]);
exit(EXIT_FAILURE);
}
}
}
/* If we are getting data from a tty, check what the actual encoding is.
* Historically, the default encoding of ebook2cw is ISO 8859-1, but
* nowadays most terminals should use UTF-8. */
if (isatty(fileno(infile))) {
interactive = 1;
#if !__MINGW32__
if (getenv("LANG") != NULL) {
if (strstr(getenv("LANG"), "utf") ||
strstr(getenv("LANG"), "UTF")) {
cw.encoding = UTF8;
}
}
#else
/* Assume Windows terminal to be UTF8 */
cw.encoding = UTF8;
#endif
}
#endif /* ifndef CGI */
/* init encoder (LAME or OGG/Vorbis) */
init_encoder(&cw);
/* Initially allocate inpcm, noisebuffer, mp3buffer, dit_buf, dah_buf */
buf_alloc(&cw);
#ifndef CGI
printf(_("Speed: %dwpm, Freq: %dHz, Chapter: >%s<, Encoding: %s\n"),cw.wpm,
cw.freq, cw.chapterstr, cw.encoding == UTF8 ? "UTF-8" : "ISO 8859-1");
printf(_("Effective speed: %dwpm, "), cw.farnsworth ? cw.farnsworth : cw.wpm);
printf(_("Extra word spaces: %1.1f, "), cw.ews);
printf(_("QRQ: %dmin, reset QRQ: %s\n"), cw.qrq, cw.reset ? _("yes") : _("no"));
if (cw.chapterwords) {
printf(_("Chapter limit: %d words, "), cw.chapterwords);
}
if (cw.chaptertime) {
printf(_("Chapter limit: %d seconds, "), cw.chaptertime);
}
printf(_("Encoder: %s\n\n"), (cw.encoder == OGG) ? "OGG" : "MP3");
if (interactive) {
printf(_("Interactive mode. Type in text and finish with Ctrl-D.\n\n"));
}
#endif
#ifdef CGI
/* CGI: utf8 input by default */
cw.encoding = UTF8;
/* CGI standard: write directly to stdout ==> no Content-Length possible
* CGI buffered: write to file /tmp/$time-$rnd and later generate output */
#ifndef CGIBUFFERED
cw.outfile = stdout;
#else
/* we need to generate a good random number for the file name;
* just using rand(time) won't do if two requests come in the
* same second. temporarily use cw.outfile FD to open urand */
if ((cw.outfile = fopen("/dev/urandom", "r")) == NULL) {
fprintf(stderr, _("Error: Failed to open /dev/urandom.\n"));
exit(EXIT_FAILURE);
}
fread(&i, sizeof(i), 1, cw.outfile);
srand(i);
i = rand();
fclose(cw.outfile);
snprintf(cgi_outfilename, 80, "/tmp/%d-%d", (int)start_time, i);
if ((cw.outfile = fopen(cgi_outfilename, "wb+")) == NULL) {
fprintf(stderr, _("Error: Failed to open %s\n"), cgi_outfilename);
exit(EXIT_FAILURE);
}
#endif
switch (cw.encoder) {
case MP3:
printf("Content-Type: audio/mpeg\n");
break;
case OGG:
printf("Content-Type: audio/ogg\n");
break;
}
#ifndef CGIBUFFERED /* header is finished */
printf("\n");
#endif
querystring = getenv("QUERY_STRING");
if ((querystring == NULL) || strlen(querystring) > 9000) {
exit(1);
}
/* the query parameters may look like:
* d=001&s=25&e=20&f=600&t=text => download, offer as filename "lcwo-001.mp3"
* s=25&e=20&f=600&t=text => return normal file
*/
if (querystring[0] == 'd') {
sscanf(querystring, "d=%d&s=%d&e=%d&f=%d&t=%9000s", &download, &cw.wpm, &cw.farnsworth, &cw.freq, text);
}
else {
sscanf(querystring, "s=%d&e=%d&f=%d&t=%9000s", &cw.wpm, &cw.farnsworth, &cw.freq, text);
}
strcat(text, " ");
urldecode(text);
if (cw.wpm == 0 || cw.freq == 0) {
exit(1);
}
flush_ogg(&cw);
#endif
init_cw(&cw); /* generate raw dit, dah */
if (strlen(cw.chapterstr)) {
strcat(cw.chapterstr, " ");
}
cw.original_wpm = cw.wpm; /* may be changed by QRQing */
chapter = 0;
#ifndef CGI
openfile(chapter, &cw);
/* Entry point for handling SIGINT; we jump back here from
* the signalhandler() function */
if (setjmp(jmp)) {
goto cleanup;
}
#endif
i=0;
pos=0;
/* 100ms of silence at the start; some decoders otherwise produce
* crackling noises */
add_silence(100, &cw);
/* read input, assemble full words (anything ending in ' ') to 'word' and
* generate CW, write to file by 'makeword'. words with > 1024 characters
* will be split */
#ifndef CGI
while ((c = getc(infile)) != EOF) {
#else
while ((c = text[i++]) != '\0') {
#endif
if (c == '\r') /* DOS linebreaks */
continue;
#if __MINGW32__
if (c == 0x04) /* EOT; Win32 console produces this for Ctl-D */
break;
#endif
if (c == '#')
cw.comment = 1;
if (cw.comment) {
if (c == '\n') {
cw.comment = 2;
}
else {
continue;
}
}
word[pos++] = c;
if ((c == ' ') || (c == '\n') || (pos == 1024)) {
word[pos] = '\0';
#ifndef CGI
/* new chapter */
if ((strcmp(cw.chapterstr, word) == 0) || /* regular */
finishchapter == 2 /* timeout/max. words */
) {
closefile(chapter, chw, chms, &cw);
tw += chw;
tms += chms;
chw = 0;
chms = 0;
chapter++;
if (cw.qrq && cw.reset) {
cw.wpm = cw.original_wpm;
init_cw(&cw);
}
finishchapter = 0;
openfile(chapter, &cw);
}
#endif
/* check for commands: |f or |w */
if (word[0] == '|') {
command(word, &cw);
}
else {
tmp = makeword(mapstring(word, &cw), &cw);
chms += tmp;
qms += tmp;
chw++;
if (cw.comment == 2)
cw.comment = 0;
}
/* Every 'cw.qrq' minutes speed up 1 WpM */
if (cw.qrq && ((qms/60000.0) > cw.qrq)) {
cw.wpm += 1;
init_cw(&cw);
printf("QRQ: %dwpm\n", cw.wpm);
qms = 0;
}
/* word finished; reached word- or time-limit? */
if (finishchapter || (cw.chaptertime && chms/1000 >= cw.chaptertime) ||
(cw.chapterwords && chw == cw.chapterwords)) {
/* Yes! Finish sentence (i.e. until next '.', '!' or '?')
* and then start a new chapter */
finishchapter = 1;
/* End of sentence? */
if (word[pos-2] == '.' ||
word[pos-2] == '!' ||
word[pos-2] == '?') {
finishchapter = 2;
}
}
word[0] = '\0';
pos = 0;
} /* word */
} /* eof */
/* If the file ends without newline or space, but directly with EOF after
* the last word, this one is lost, so we need to add it... */
if (strlen(word) && word[0] != '|' && word[0] != '#') {
makeword(mapstring(word, &cw), &cw);
chw++;
}
/* CGI: Add some silence (500ms) to the end of the file */
#ifdef CGI
add_silence(500, &cw);
#endif
#ifndef CGI
closefile(chapter, chw, chms, &cw);
end_time = time(NULL);
printf(_("Total words: %d, total time: %s\n"), tw+chw, timestring(tms+chms));
printf(_("Conversion time: %s (Speedup: %.1fx)\n"),
timestring(1000.0 * difftime(end_time, start_time)),
((tms+chms)/(1000.0 * difftime(end_time,start_time)))
);
#else /* in CGI mode, we need to do this to close the file properly */
if (cw.encoder == OGG) { /* (otherwise done in closefile() */
#ifdef OGGV
vorbis_analysis_wrote(&vd,0);
ogg_encode_and_write(&cw);
#endif
}
#endif
if (cw.encoder == MP3) {
#ifdef LAME
lame_close(gfp);
#endif
}
else {
#ifdef OGGV
ogg_stream_clear(&os);
vorbis_block_clear(&vb);
vorbis_dsp_clear(&vd);
vorbis_comment_clear(&vc);
vorbis_info_clear(&vi);
#endif
}
free(cw.mp3buffer);
free(cw.inpcm);
free(cw.noisebuf);
free(cw.dah_buf);
free(cw.dit_buf);
if (download) {
printf("Content-Disposition: attachment; filename=\"lcwo-%03d.mp3\"\n", download);
}
#ifdef CGIBUFFERED
/* File is completed, so we know the length and can send the
* content length header, and then the whole file */
printf("Content-Length: %d\n", cw.outfile_length);
printf("\n");
i = (int) ftell(cw.outfile);
rewind(cw.outfile);
/* maybe one day sendfile(2) will support writing to a
* file descriptor, not just a socket, to make this
* easier and faster... */
cgibuf = malloc((size_t) i+1);
if (cgibuf == NULL) {
fprintf(stderr, _("malloc() for cgibuf failed!\n"));
exit(EXIT_FAILURE);
}
fread(cgibuf, sizeof(char), (size_t) i, cw.outfile);
fclose(cw.outfile);
fwrite(cgibuf, sizeof(char), (size_t) i, stdout);
free(cgibuf);
unlink(cgi_outfilename);
#endif
/* NON-CGI operation: If we produced no output, remove the
* empty file */
#ifndef CGI
cleanup:
if (!chw) {
printf(_("Deleting empty file: %s\n"), cw.outfilename);
unlink(cw.outfilename);
}
#endif
return (EXIT_SUCCESS);
}
/* init_cw - generates a dit and a dah to dit_buf and dah_buf */
void init_cw (CWP *cw) {
int samples_per_minute;
int x, len;
double val, val1, val2;
samples_per_minute = 60*cw->samplerate;
len = (int) (samples_per_minute/(50.0*cw->wpm));
/* size of dit_buf, dah_buf may have to be increased, when speed decreased */
if (len > cw->ditlen) {
if ((cw->dah_buf = realloc(cw->dah_buf, 3*len * sizeof(short int))) == NULL) {
fprintf(stderr, _("Error: Can't reallocate dah_buf[%d]\n"), 3*len);
exit(EXIT_FAILURE);
}
if ((cw->dit_buf = realloc(cw->dit_buf, len * sizeof(short int))) == NULL) {
fprintf(stderr, _("Error: Can't allocate dit_buf[%d]\n"), len);
exit(EXIT_FAILURE);
}
}
/* both dah_buf and dit_buf are filled in this loop */
for (x=0; x < 3*len; x++) {
switch (cw->waveform) {
case SINE:
val = sin(2*M_PI*cw->freq*x/cw->samplerate);
break;
case SAWTOOTH:
val = ((1.0*cw->freq*x/cw->samplerate)-
floor(1.0*cw->freq*x/cw->samplerate))-0.5;
break;
case SQUARE:
val = ceil(sin(2*M_PI*cw->freq*x/cw->samplerate))-0.5;
break;
}
/* Shaping rising edge, same for dit and dah */
if (x < cw->rt)
val *= pow(sin(M_PI*x/(2.0*cw->rt)),2);
val1 = val2 = val;
/* Shaping falling edge, dit */
if (x < len) {
if (x > (len-cw->ft)) {
val1 *= pow((sin(2*M_PI*(x-(len-cw->ft)+cw->ft)/(4*cw->ft))), 2);
}
cw->dit_buf[x] = (short int) (val1 * CWAMPLITUDE);
}
/* Shaping falling edge, dah */
if (x > (3*len-cw->ft)) {
val2 *= pow((sin(2*M_PI*(x-(3*len-cw->ft)+cw->ft)/(4*cw->ft))), 2);
}
cw->dah_buf[x] = (short int) (val2 * CWAMPLITUDE);
} /* for */
cw->ditlen = len;
/* calculate farnsworth length samples */
if (cw->farnsworth) {
if (cw->farnsworth > cw->wpm) {
fprintf(stderr, _("Warning: Effective speed (-e %d) must be lower "
"than character speed (-w %d)! Speed adjusted to %d.\n"),
cw->farnsworth, cw->wpm, cw->wpm);
cw->farnsworth = cw->wpm;
}
/* by convention, wpm is measured using the word "Paris". With a dah
being 3 dits, and a spacing of one dit between sigs, this word
has a total length of
1+3+3+1 +3 +3 +1+3 +1 +3 +1+3+1 +2 +3 +1+1 +1 +3 +1+1+1 +2 = 43 dit lengths
Together with an additional word break of 7 dits this makes 50
dit lengths.
Actually, the total duration of only the sigs themselves is only
1+3+3+1 +3 +1+3 +1 +1+3+1 +2 +1+1 +1 +1+1+1 +2 = 31 dit lengths
and the other 12 dits are inter-sig pauses.
The definition of n "words per minute" speed means that this is
the speed where the operator gives the word "Paris" n times per
minute.
The sigs at a speed of cw->wpm have a total length of
cw->farnsworth * 31 dits
The total length of pauses is
cw->farnsworth * (12+7) dits
Note that the the effective wpm is relevant for the count here.
According to the farnsworth method, the inter-sig and inter-word
pauses are elongated such that the operator gives "Paris" only
cw->farnsworth times.
The total length of the sigs in samples is
*/
int total_sigs_samples = cw->farnsworth * 31 * cw->ditlen;
/*
This allows to determine the length of a ditlength during a
farnsworth break.*/
cw->fditlen = (samples_per_minute - total_sigs_samples) / (cw->farnsworth * (12+7));
}
/* Calculate maximum number of bytes per 'dah' for the PCM stream,
* this will be used later to check if the buffer runs full
* (10000 margin) */
if (cw->farnsworth) {
cw->maxbytes = (int) ((4+7.0*cw->ews)*(cw->fditlen)) + 10000;
}
else {
cw->maxbytes = (int) ((6+7.0*cw->ews) * len) + 10000;
}
/* Calculate word space, letter space, considering EWS and farnsworth */
cw->wordspace =(int)(1+7*cw->ews)*(cw->farnsworth ? cw->fditlen : cw->ditlen);
cw->letterspace = (cw->farnsworth ? 3*cw->fditlen - cw->ditlen : 2*cw->ditlen);
return;
}
/* makeword -- converts 'text' to CW by concatenating dit_buf amd dah_bufs,
* encodes this to MP3 and writes to open filehandle outfile */
int makeword(char * text, CWP *cw) {
const char *code; /* CW code as . and - */
int c, i, j, u, w;
int prosign = 0;
unsigned char last=0; /* for utf8 2-byte characters */
j = 0; /* position in 'inpcm' buffer */
for (i = 0; i < strlen(text); i++) {
c = (unsigned char) text[i];
code = NULL;
cw->linepos++;
if (c == '\n') { /* Same for UTF8 and ISO8859 */
if (cw->comment == 0 && strlen(text) == 1 && cw->pBT) /* paragraph */
code = " -...- ";
else if (cw->comment) { /* No spaces after comment line */
code = " ";
}
else { /* Space instead of newline */
code = " ";
}
cw->linepos = 0;
cw->linecount++;
}
else if (c == '<') { /* prosign on */
prosign = 1;
continue;
}
else if ((c == '>') && prosign) { /* prosign off */
prosign = 0;
code = ""; /* only inserts letter space */
}
else if (cw->encoding == ISO8859) {
code = iso8859[c];
}
else if (cw->encoding == UTF8) {
/* Character may be 1-byte ASCII or 2-byte UTF8 */
if (!(c & 128)) { /* MSB = 0 -> 7bit ASCII */
code = iso8859[c]; /* subset of iso8859 */
}
else {
if (last && (c < 192) ) { /* this is the 2nd byte */
/* 110yyyyy 10zzzzzz -> 00000yyy yyzzzzzz */
c = ((last & 31) << 6) | (c & 63);
code = utf8table[c];
last = 0;
}
else { /* this is the first byte */
last = c;
}
}
}
if (last) continue; /* first of two-byte character read */
/* Not found anything, produce warning message */
if (code == NULL) {
#ifndef CGI
if (c < 128) {
fprintf(stderr, _("Warning: Don't know CW for '%c'. "), c);
}
else if (cw->encoding == ISO8859) {
fprintf(stderr, _("Warning: Don't know CW for '%c' (0x%01X) (try the -u switch to enable UTF-8). "), c, c);
}
else {
/* TODO: Consider using libunistring's unicode_character_name()
* function to provide the name of the character */
fprintf(stderr, _("Warning: Don't know CW for unicode code point U+%04X. "), c);
}
fprintf(stderr, _("[Line %d, Byte %d]\n"), cw->linecount, cw->linepos);
#endif
code = " ";
}
/* code contains letter as ./-, now assemble pcm buffer */
for (w = 0; w < strlen(code) ; w++) {
/* make sure the inpcm buffer doesn't run full,
* with a conservative margin. reallocate memory if neccesary */
buf_check(j, cw);
c = code[w];
if (c == '.') {
for (u=0; u < cw->ditlen; u++) {
cw->inpcm[++j] = cw->dit_buf[u];
}
}
else if (c == '-') {
for (u=0; u < (3*cw->ditlen); u++) {
cw->inpcm[++j] = cw->dah_buf[u];
}
}
else { /* word space */
for (u=0;u < cw->wordspace; u++)
cw->inpcm[++j] = 0;
}
for (u=0; u < cw->ditlen; u++) {
cw->inpcm[++j] = 0;
}
} /* foreach dot/dash */
if (prosign == 0) {
for (u=0; u < cw->letterspace; u++)
cw->inpcm[++j] = 0;
}
} /* foreach letter */
/* j = total length of samples in 'inpcm' */
if (cw->addnoise) {
addnoise(j, cw);
}
encode_buffer(j, cw);
return (int) (1000.0*j/cw->samplerate); /* encoded length in ms */
}
/* closefile -- finishes writing the current file, flushes the encoder buffer */
void closefile (int chapter, int chw, int chms, CWP *cw) {
int outbytes = 0;
printf(_("words: %d, time: %s\n"), chw, timestring(chms));
printf(_("Finishing %s\n\n"), cw->outfilename);
switch (cw->encoder) {
case MP3:
#ifdef LAME
outbytes = lame_encode_flush(gfp,cw->mp3buffer, cw->mp3buffer_size);
if (outbytes < 0) {
fprintf(stderr, "Error: lame_encode_buffer returned %d.\n",
outbytes);
exit(EXIT_FAILURE);
}
if (fwrite(cw->mp3buffer, sizeof(char), outbytes, cw->outfile) !=
outbytes) {
fprintf(stderr, "Error: Writing %db to file failed. Exit.\n",
outbytes);
exit(EXIT_FAILURE);
}
cw->outfile_length += outbytes;
#endif
break;
case OGG:
#ifdef OGGV
vorbis_analysis_wrote(&vd,0);
ogg_encode_and_write(cw);
#endif
break;
case NOENC:
/* Do nothing */
break;
}
if (cw->encoder != NOENC)
fclose(cw->outfile);
}
/* openfile -- starts a new chapter by opening a new file as outfile */
void openfile (int chapter, CWP *cw) {
#ifdef LAME
static char tmp[80] = "";
#endif
#ifdef OGGV
ogg_packet hdr;
ogg_packet hdr_comm;
ogg_packet hdr_code;
#endif
/* If we have a chapter separator string, use format Chapter0001.mp3 */
if (strlen(cw->chapterstr) && cw->chapterstr[0] != '-') {
snprintf(cw->outfilename, PATH_MAX, "%s%04d.%s", cw->chapterfilename,
chapter, (cw->encoder == MP3) ? "mp3" : "ogg");
}
else { /* otherwise just Chapter.mp3 */
snprintf(cw->outfilename, PATH_MAX, "%s.%s", cw->chapterfilename,
(cw->encoder == MP3) ? "mp3" : "ogg");
}
printf(_("Starting %s\n"), cw->outfilename);
if ((cw->encoder != NOENC) &&
(cw->outfile = fopen(cw->outfilename, "wb")) == NULL) {
fprintf(stderr, _("Error: Failed to open %s\n"), cw->outfilename);
exit(EXIT_FAILURE);
}
switch (cw->encoder) {
case MP3:
#ifdef LAME
snprintf(tmp, 79, "%s - %d", cw->id3_title, chapter); /* title */
id3tag_init(gfp);
id3tag_set_artist(gfp, cw->id3_author);
id3tag_set_year(gfp, cw->id3_year);
id3tag_set_title(gfp, tmp);
id3tag_set_comment(gfp, cw->id3_comment);
#endif
break;
case OGG:
#ifdef OGGV
vorbis_comment_init(&vc);
vorbis_comment_add_tag(&vc,"ENCODER","ebook2cw");
vorbis_analysis_init(&vd, &vi);
vorbis_block_init(&vd, &vb);
ogg_stream_init(&os,rand());
vorbis_analysis_headerout(&vd,&vc,&hdr,&hdr_comm,&hdr_code);
ogg_stream_packetin(&os,&hdr);
ogg_stream_packetin(&os,&hdr_comm);
ogg_stream_packetin(&os,&hdr_code);
flush_ogg(cw);
#endif
break;
case NOENC:
/* Do nothing */
break;
}
}
void help (void) {
printf(_("This is free software, and you are welcome to redistribute it\n"));
printf(_("under certain conditions (see COPYING).\n"));
printf("\n");
printf(_("ebook2cw [-w wpm] [-f freq] [-R risetime] [-F falltime]\n"));
printf(_(" [-s samplerate] [-b mp3bitrate] [-q mp3quality] [-p]\n"));
printf(_(" [-c chapter-separator] [-o outfile-name] [-Q minutes]\n"));
printf(_(" [-a author] [-t title] [-k comment] [-y year]\n"));
printf(_(" [-u] [-S ISO|UTF] [-n] [-e eff.wpm] [-W space]\n"));
printf(_(" [-N snr] [-B filter bandwidth] [-C filter center]\n"));
printf(_(" [-T 0..2] [-g filename] [-l words] [-d seconds]\n"));
printf(_(" [-O for OGG output format] \n"));
printf(_(" [infile]\n\n"));