1 /* GStreamer tmplayer format subtitle parser

     2  * Copyright (C) 2006 Tim-Philipp Müller <tim centricular net>

     3  *

     4  * This library is free software; you can redistribute it and/or

     5  * modify it under the terms of the GNU Library General Public

     6  * License as published by the Free Software Foundation; either

     7  * version 2 of the License, or (at your option) any later version.

     8  *

     9  * This library is distributed in the hope that it will be useful,

    10  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    12  * Library General Public License for more details.

    13  *

    14  * You should have received a copy of the GNU Library General Public

    15  * License along with this library; if not, write to the

    16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,

    17  * Boston, MA 02111-1307, USA.

    18  */

    19 

    20 #include "tmplayerparse.h"

    21 

    22 #include <string.h>

    23 

    24 /* From http://forum.doom9.org/archive/index.php/t-81059.html:

    25  * 

    26  * TMPlayer format, which comes in five varieties:

    27  * 

    28  * time-base 00:00:00:

    29  * 00:00:50:This is the Earth at a time|when the dinosaurs roamed...

    30  * 00:00:53:

    31  * 00:00:54:a lush and fertile planet.

    32  * 00:00:56:

    33  * 

    34  * time-base 0:00:00:

    35  * 0:00:50:This is the Earth at a time|when the dinosaurs roamed...

    36  * 0:00:53:

    37  * 0:00:54:a lush and fertile planet.

    38  * 0:00:56:

    39  * 

    40  * time-base 00:00:00=

    41  * 00:00:50=This is the Earth at a time|when the dinosaurs roamed...

    42  * 00:00:53=

    43  * 00:00:54=a lush and fertile planet.

    44  * 00:00:56=

    45  * 

    46  * time-base 0:00:00=

    47  * 0:00:50=This is the Earth at a time|when the dinosaurs roamed...

    48  * 0:00:53=

    49  * 0:00:54=a lush and fertile planet.

    50  * 0:00:56=

    51  * 

    52  * and multiline time-base 00:00:00,1=

    53  * 00:00:50,1=This is the Earth at a time

    54  * 00:00:50,2=when the dinosaurs roamed...

    55  * 00:00:53,1=

    56  * 00:00:54,1=a lush and fertile planet.

    57  * 00:00:56,1=

    58  */

    59 

    60 static gchar *

    61 tmplayer_parse_line (ParserState * state, const gchar * line, guint line_num)

    62 {

    63   GstClockTime ts = GST_CLOCK_TIME_NONE;

    64   const gchar *text_start = NULL;

    65   gboolean multiline = FALSE;

    66   gchar *ret = NULL;

    67   gchar divc = '\0';

    68   guint h, m, s, l = 1;

    69 

    70   if (sscanf (line, "%u:%02u:%02u,%u%c", &h, &m, &s, &l, &divc) == 5 &&

    71       (divc == '=')) {

    72     GST_LOG ("multiline format %u %u %u %u", h, m, s, l);

    73     ts = GST_SECOND * ((((h * 60) + m) * 60) + s);

    74     text_start = strchr (line, '=');

    75     multiline = TRUE;

    76   } else if (sscanf (line, "%u:%02u:%02u%c", &h, &m, &s, &divc) == 4 &&

    77       (divc == '=' || divc == ':')) {

    78     GST_LOG ("single line format %u %u %u %u %c", h, m, s, l, divc);

    79     ts = GST_SECOND * ((((h * 60) + m) * 60) + s);

    80     text_start = strchr (line + 6, divc);

    81   } else {

    82     GST_WARNING ("failed to parse line: '%s'", line);

    83     return NULL;

    84   }

    85 

    86   if (text_start == NULL || text_start[1] == '\0' ||

    87       (l == 1 && state->buf->len > 0)) {

    88     if (GST_CLOCK_TIME_IS_VALID (state->start_time) &&

    89         state->start_time < ts && line_num > 0) {

    90       ret = g_strndup (state->buf->str, state->buf->len);

    91       g_strdelimit (ret, "|", '\n');

    92       g_string_truncate (state->buf, 0);

    93       state->duration = ts - state->start_time;

    94     } else if (line_num > 0) {

    95       GST_WARNING ("end of subtitle unit but no valid start time?!");

    96     }

    97   } else {

    98     if (l > 1)

    99       g_string_append_c (state->buf, '\n');

   100     g_string_append (state->buf, text_start + 1);

   101     state->start_time = ts;

   102   }

   103 

   104   return ret;

   105 }

   106 #ifdef __SYMBIAN32__

   107 EXPORT_C

   108 #endif

   109 

   110 

   111 gchar *

   112 parse_tmplayer (ParserState * state, const gchar * line)

   113 {

   114   gchar *ret;

   115 

   116   /* GST_LOG ("Parsing: %s", line); */

   117 

   118   ret = tmplayer_parse_line (state, line, state->state);

   119   ++state->state;

   120 

   121   return ret;

   122 }