1 /* GStreamer mpl2 format subtitle parser

     2  * Copyright (C) 2006 Kamil Pawlowski <kamilpe gmail com>

     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 "mpl2parse.h"

    21 

    22 #include <string.h>

    23 

    24 /* From http://lists.mplayerhq.hu/pipermail/mplayer-users/2003-February/030222.html

    25  *

    26  * [123][456] Sample subtitle

    27  * [1234][5678] Line 1|Line 2

    28  * [12345][67890] /Italic|Normal

    29  * [12345][67890] /Italic|/Italic

    30  * [12345][67890] Normal|/Italic 

    31  *

    32  * (The space between the last ']' bracket and the text appears to be optional)

    33  */

    34 

    35 static gchar *

    36 mpl2_parse_line (ParserState * state, const gchar * line, guint line_num)

    37 {

    38   GString *markup;

    39   gint dc_start, dc_stop;

    40 

    41   /* parse subtitle file line */

    42   if (sscanf (line, "[%u][%u]", &dc_start, &dc_stop) != 2) {

    43     GST_WARNING ("failed to extract timestamps for line '%s'", line);

    44     return NULL;

    45   }

    46 

    47   GST_LOG ("line format %u %u", dc_start, dc_stop);

    48   state->start_time = GST_SECOND / 10 * dc_start;

    49   state->duration = (GST_SECOND / 10 * dc_stop) - state->start_time;

    50 

    51   /* skip brackets with timestamps */

    52   line = strchr (line, ']') + 1;

    53   line = strchr (line, ']') + 1;

    54 

    55   markup = g_string_new (NULL);

    56 

    57   while (1) {

    58     const gchar *format_string;

    59     const gchar *sep;

    60     gchar *line_chunk_escaped;

    61 

    62     /* skip leading white spaces */

    63     while (*line == ' ' || *line == '\t')

    64       ++line;

    65 

    66     /* a '/' at the beginning indicates italics */

    67     if (*line == '/') {

    68       format_string = "<i>%s</i>";

    69       ++line;

    70     } else {

    71       format_string = "%s";

    72     }

    73 

    74     if ((sep = strchr (line, '|')))

    75       line_chunk_escaped = g_markup_escape_text (line, sep - line);

    76     else

    77       line_chunk_escaped = g_markup_escape_text (line, -1);

    78 

    79     GST_LOG ("escaped line: %s", line_chunk_escaped);

    80     g_string_append_printf (markup, format_string, line_chunk_escaped);

    81 

    82     g_free (line_chunk_escaped);

    83 

    84     if (sep == NULL)

    85       break;

    86 

    87     /* move after the '|' and append another line */

    88     g_string_append (markup, "\n");

    89     line = sep + 1;

    90   }

    91 

    92   return g_strstrip (g_string_free (markup, FALSE));

    93 }

    94 #ifdef __SYMBIAN32__

    95 EXPORT_C

    96 #endif

    97 

    98 

    99 gchar *

   100 parse_mpl2 (ParserState * state, const gchar * line)

   101 {

   102   gchar *ret;

   103 

   104   ret = mpl2_parse_line (state, line, state->state);

   105   ++state->state;

   106   return ret;

   107 }