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1e269a3c6d
Fixes https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=49245 Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2989>
118 lines
3.2 KiB
C
118 lines
3.2 KiB
C
/* GStreamer mpl2 format subtitle parser
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* Copyright (C) 2006 Kamil Pawlowski <kamilpe gmail com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#include "mpl2parse.h"
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#include <stdio.h>
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#include <string.h>
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/* From http://lists.mplayerhq.hu/pipermail/mplayer-users/2003-February/030222.html
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*
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* [123][456] Sample subtitle
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* [1234][5678] Line 1|Line 2
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* [12345][67890] /Italic|Normal
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* [12345][67890] /Italic|/Italic
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* [12345][67890] Normal|/Italic
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*
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* (The space between the last ']' bracket and the text appears to be optional)
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*/
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static gchar *
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mpl2_parse_line (ParserState * state, const gchar * line, guint line_num)
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{
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GString *markup;
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const char *orig_line = line;
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gint dc_start, dc_stop;
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/* parse subtitle file line */
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if (sscanf (line, "[%u][%u]", &dc_start, &dc_stop) != 2) {
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GST_WARNING ("failed to extract timestamps for line '%s'", orig_line);
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return NULL;
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}
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GST_LOG ("line format %u %u", dc_start, dc_stop);
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state->start_time = GST_SECOND / 10 * dc_start;
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state->duration = (GST_SECOND / 10 * dc_stop) - state->start_time;
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/* skip brackets with timestamps */
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line = strchr (line, ']');
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if (!line) {
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GST_WARNING ("invalid, timestamp missing first \']\' for '%s'", orig_line);
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return NULL;
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}
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line += 1;
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line = strchr (line, ']');
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if (!line) {
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GST_WARNING ("invalid, timestamp missing second \']\' for '%s'", orig_line);
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return NULL;
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}
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line += 1;
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markup = g_string_new (NULL);
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while (1) {
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const gchar *sep;
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gchar *line_chunk_escaped;
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gboolean italics;
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/* skip leading white spaces */
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while (*line == ' ' || *line == '\t')
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++line;
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/* a '/' at the beginning indicates italics */
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if (*line == '/') {
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italics = TRUE;
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g_string_append (markup, "<i>");
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++line;
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} else {
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italics = FALSE;
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}
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if ((sep = strchr (line, '|')))
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line_chunk_escaped = g_markup_escape_text (line, sep - line);
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else
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line_chunk_escaped = g_markup_escape_text (line, -1);
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GST_LOG ("escaped line: %s", line_chunk_escaped);
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g_string_append (markup, line_chunk_escaped);
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g_free (line_chunk_escaped);
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if (italics)
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g_string_append (markup, "</i>");
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if (sep == NULL)
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break;
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/* move after the '|' and append another line */
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g_string_append (markup, "\n");
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line = sep + 1;
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}
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return g_strstrip (g_string_free (markup, FALSE));
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}
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gchar *
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parse_mpl2 (ParserState * state, const gchar * line)
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{
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gchar *ret;
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ret = mpl2_parse_line (state, line, state->state);
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++state->state;
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return ret;
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}
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