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/* GStreamer tmplayer format subtitle parser
* Copyright (C) 2006-2008 Tim-Philipp Müller <tim centricular net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "tmplayerparse.h"
#include <stdio.h>
#include <string.h>
/* From http://forum.doom9.org/archive/index.php/t-81059.html:
*
* TMPlayer format, which comes in five varieties:
*
* time-base 00:00:00:
* 00:00:50:This is the Earth at a time|when the dinosaurs roamed...
* 00:00:53:
* 00:00:54:a lush and fertile planet.
* 00:00:56:
*
* time-base 0:00:00:
* 0:00:50:This is the Earth at a time|when the dinosaurs roamed...
* 0:00:53:
* 0:00:54:a lush and fertile planet.
* 0:00:56:
*
* time-base 00:00:00=
* 00:00:50=This is the Earth at a time|when the dinosaurs roamed...
* 00:00:53=
* 00:00:54=a lush and fertile planet.
* 00:00:56=
*
* time-base 0:00:00=
* 0:00:50=This is the Earth at a time|when the dinosaurs roamed...
* 0:00:53=
* 0:00:54=a lush and fertile planet.
* 0:00:56=
*
* and multiline time-base 00:00:00,1=
* 00:00:50,1=This is the Earth at a time
* 00:00:50,2=when the dinosaurs roamed...
* 00:00:53,1=
* 00:00:54,1=a lush and fertile planet.
* 00:00:56,1=
*
* --------------------------------------------------------------------------
*
* And another variety (which is 'time-base 0:00:00:' but without empty lines):
*
* 00:00:01:This is the Earth at a time|when the dinosaurs roamed...
* 00:00:03:a lush and fertile planet.
* 00:00:06:More text here
* 00:00:12:Yet another line
*
*/
static gchar *
tmplayer_process_buffer (ParserState * state)
{
gchar *ret;
ret = g_strndup (state->buf->str, state->buf->len);
g_strdelimit (ret, "|", '\n');
g_string_truncate (state->buf, 0);
return ret;
}
static gchar *
tmplayer_parse_line (ParserState * state, const gchar * line, guint line_num)
{
GstClockTime ts = GST_CLOCK_TIME_NONE;
const gchar *text_start = NULL;
gboolean multiline = FALSE;
gchar *ret = NULL;
gchar divc = '\0';
guint h, m, s, l = 1;
if (sscanf (line, "%u:%02u:%02u,%u%c", &h, &m, &s, &l, &divc) == 5 &&
(divc == '=')) {
GST_LOG ("multiline format %u %u %u %u", h, m, s, l);
ts = GST_SECOND * ((((h * 60) + m) * 60) + s);
text_start = strchr (line, '=');
multiline = TRUE;
} else if (sscanf (line, "%u:%02u:%02u%c", &h, &m, &s, &divc) == 4 &&
(divc == '=' || divc == ':')) {
GST_LOG ("single line format %u %u %u %u %c", h, m, s, l, divc);
ts = GST_SECOND * ((((h * 60) + m) * 60) + s);
text_start = strchr (line + 6, divc);
} else if (line[0] == '\0' && state->buf->len > 0 &&
GST_CLOCK_TIME_IS_VALID (state->start_time)) {
/* if we get an empty line (could be the end of the file, but doesn't have
* to be), just push whatever is still in the buffer without a duration */
GST_LOG ("empty line, and there's still text in the buffer");
ret = tmplayer_process_buffer (state);
state->duration = GST_CLOCK_TIME_NONE;
return ret;
} else {
GST_WARNING ("failed to parse line: '%s'", line);
return NULL;
}
/* if this is a line without text, or the first line in a multiline file,
* process and return the data in the buffer, which is the previous line(s) */
if (text_start == NULL || text_start[1] == '\0' ||
(l == 1 && state->buf->len > 0)) {
if (GST_CLOCK_TIME_IS_VALID (state->start_time) &&
state->start_time < ts && line_num > 0) {
ret = tmplayer_process_buffer (state);
state->duration = ts - state->start_time;
/* ..and append current line's text (if there is any) for the next round.
* We don't have to store ts as pending_start_time, since we deduce the
* durations from the start times anyway, so as long as the parser just
* forwards state->start_time by duration after it pushes the line we
* are about to return it will all be good. */
g_string_append (state->buf, text_start + 1);
} else if (line_num > 0) {
GST_WARNING ("end of subtitle unit but no valid start time?!");
}
} else {
if (l > 1)
g_string_append_c (state->buf, '\n');
g_string_append (state->buf, text_start + 1);
state->start_time = ts;
}
GST_LOG ("returning: '%s'", GST_STR_NULL (ret));
return ret;
}
gchar *
parse_tmplayer (ParserState * state, const gchar * line)
{
gchar *ret;
/* GST_LOG ("Parsing: %s", line); */
ret = tmplayer_parse_line (state, line, state->state);
++state->state;
return ret;
}
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