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/*
ogmmerge -- utility for splicing together ogg bitstreams
from component media subtypes
r_microdvd.cpp
MicroDVD text subtitle reader module
Written by Moritz Bunkus <moritz@bunkus.org>
Based on Xiph.org's 'oggmerge' found in their CVS repository
See http://www.xiph.org
Distributed under the GPL
see the file COPYING for details
or visit http://www.gnu.org/copyleft/gpl.html
*/
#include <ctype.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <ogg/ogg.h>
#include "ogmmerge.h"
#include "ogmstreams.h"
#include "queue.h"
#include "r_microdvd.h"
#include "subtitles.h"
int microdvd_reader_c::probe_file(FILE *file, off_t size) {
char chunk[2048];
int i;
if (fseeko(file, 0, SEEK_SET) != 0)
return 0;
if (fgets(chunk, 2047, file) == NULL)
return 0;
if ((chunk[0] != '{') || !isdigit(chunk[1]))
return 0;
i = 2;
while (isdigit(chunk[i]))
i++;
if ((chunk[i] != '}') || (chunk[i + 1] != '{'))
return 0;
i += 2;
while (isdigit(chunk[i]))
i++;
if ((chunk[i] != '}') || (chunk[i + 1] == 0) || (chunk[i + 1] == '\n') ||
(chunk[i + 1] == '\r'))
return 0;
if (fseeko(file, 0, SEEK_SET) != 0)
return 0;
return 1;
}
microdvd_reader_c::microdvd_reader_c(char *fname, audio_sync_t *nasync,
range_t *nrange, char **ncomments)
throw (error_c) {
if ((file = fopen(fname, "r")) == NULL)
throw error_c("microdvd_reader: Could not open source file.");
if (!microdvd_reader_c::probe_file(file, 0))
throw error_c("microdvd_reader: Source is not a valid MicroDVD file.");
textsubspacketizer = new textsubs_packetizer_c(nasync, nrange, ncomments);
if (verbose)
fprintf(stderr, "Using MicroDVD subtitle reader for %s.\n+-> Using " \
"text subtitle output module for subtitles.\n", fname);
}
microdvd_reader_c::~microdvd_reader_c() {
if (textsubspacketizer != NULL)
delete textsubspacketizer;
}
int microdvd_reader_c::read() {
ogg_int64_t start, end;
char *subtitles, *s, *s2;
subtitles_c subs;
int i, j, lineno;
if (video_fps < 0.0) {
fprintf(stderr, "microdvd_reader: You have to add a video source before "
"a MicroDVD source. Otherwise the frame numbers cannot be "
"converted to time stamps.");
exit(1);
}
lineno = 0;
while (1) {
if (fgets(chunk, 2047, file) == NULL)
break;
lineno++;
// {123}{4567}Some text|and even another line.
if ((chunk[0] == 0) || (strchr("\n\r", chunk[0]) != NULL))
continue;
if ((chunk[0] != '{') || !isdigit(chunk[1])) {
fprintf(stdout, "microdvd_reader: Warning: Unrecognized line %d. "
"Ignored.\n", lineno);
continue;
}
i = 2;
while (isdigit(chunk[i]))
i++;
if ((chunk[i] != '}') || (chunk[i + 1] != '{')) {
fprintf(stdout, "microdvd_reader: Warning: Unrecognized line %d. "
"Ignored.\n", lineno);
continue;
}
chunk[i] = 0;
start = strtol(&chunk[1], NULL, 10);
if ((start < 0) || (errno != 0)) {
fprintf(stdout, "microdvd_reader: Warning: Bad start frame '%s' on line "
"%d. Ignored.\n", &chunk[1], lineno);
continue;
}
i += 2;
j = i;
while (isdigit(chunk[i]))
i++;
if ((chunk[i] != '}') || (chunk[i + 1] == 0)) {
fprintf(stdout, "microdvd_reader: Warning: Unrecognized line %d. "
"Ignored.\n", lineno);
continue;
}
if ((chunk[i + 1] == '\n') || (chunk[i + 1] == '\r'))
continue;
chunk[i] = 0;
end = strtol(&chunk[j], NULL, 10);
if ((end < 0) || (errno != 0)) {
fprintf(stdout, "microdvd_reader: Warning: Bad end frame '%s' on line "
"%d. Ignored.\n", &chunk[j], lineno);
continue;
}
start = (ogg_int64_t)(start * 1000 / video_fps);
end = (ogg_int64_t)(end * 1000 / video_fps);
subtitles = NULL;
s = &chunk[i + 1];
s2 = &s[strlen(s) - 1];
while ((s2 != s) && ((*s2 == '\n') || (*s2 == '\r'))) {
*s2 = 0;
s2--;
}
if (*s == 0) {
fprintf(stdout, "microdvd_reader: Warning: Unrecognized line %d. "
"Ignored.\n", lineno);
continue;
}
while (s != NULL) {
s2 = strchr(s, '|');
if (s2 != NULL)
*s2 = 0;
if (subtitles == NULL) {
subtitles = strdup(s);
if (subtitles == NULL)
die("malloc");
} else {
subtitles = (char *)realloc(subtitles, strlen(s) + 2 +
strlen(subtitles));
if (subtitles == NULL)
die("malloc");
sprintf(&subtitles[strlen(subtitles)], "\n%s", s);
}
if (s2 != NULL)
s = &s2[1];
else
s = NULL;
}
if (subtitles != NULL) {
subs.add(start, end, subtitles);
free(subtitles);
subtitles = NULL;
}
}
if ((subs.check() != 0) && verbose)
fprintf(stdout, "MicroDVD_reader: Warning: The subtitle file seems to be "
"badly broken. The output file might not be playable "
"correctly.\n");
subs.process(textsubspacketizer);
return 0;
}
int microdvd_reader_c::serial_in_use(int serial) {
return textsubspacketizer->serial_in_use(serial);
}
ogmmerge_page_t *microdvd_reader_c::get_header_page(int header_type) {
return textsubspacketizer->get_header_page(header_type);
}
ogmmerge_page_t *microdvd_reader_c::get_page() {
return textsubspacketizer->get_page();
}
int microdvd_reader_c::display_priority() {
return DISPLAYPRIORITY_LOW;
}
void microdvd_reader_c::reset() {
if (textsubspacketizer != NULL)
textsubspacketizer->reset();
}
static char wchar[] = "-\\|/-\\|/-";
void microdvd_reader_c::display_progress() {
fprintf(stdout, "working... %c\r", wchar[act_wchar]);
act_wchar++;
if (act_wchar == strlen(wchar))
act_wchar = 0;
fflush(stdout);
}
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