/* 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., 51 Franklin St, Fifth Floor, * Boston, MA 02110-1301, 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; 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, '='); } 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; }