mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-09-20 11:00:16 +00:00
c4f4ae51ef
Original commit message from CVS: * gst/realmedia/Makefile.am: * gst/realmedia/rmdemux.c: (gst_rmdemux_parse_mdpr), (gst_rmdemux_parse_cont): * gst/realmedia/rmutils.c: (gst_rm_utils_read_string8), (gst_rm_utils_read_string16), (gst_rm_utils_read_tags): * gst/realmedia/rmutils.h: Factor out some code into rmutils.[ch]; when reading strings, don't read beyond the available data; read metadata strings correctly (string length is 16 bits here, not just 8).
122 lines
3 KiB
C
122 lines
3 KiB
C
/* GStreamer RealMedia utility functions
|
|
* Copyright (C) 2006 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.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include "rmutils.h"
|
|
|
|
gchar *
|
|
gst_rm_utils_read_string8 (const guint8 * data, guint datalen,
|
|
guint * p_total_len)
|
|
{
|
|
gint length;
|
|
|
|
if (p_total_len)
|
|
*p_total_len = 0;
|
|
|
|
if (datalen < 1)
|
|
return NULL;
|
|
|
|
length = GST_READ_UINT8 (data);
|
|
if (datalen < (1 + length))
|
|
return NULL;
|
|
|
|
if (p_total_len)
|
|
*p_total_len = 1 + length;
|
|
|
|
return g_strndup ((gchar *) data + 1, length);
|
|
}
|
|
|
|
gchar *
|
|
gst_rm_utils_read_string16 (const guint8 * data, guint datalen,
|
|
guint * p_total_len)
|
|
{
|
|
gint length;
|
|
|
|
if (p_total_len)
|
|
*p_total_len = 0;
|
|
|
|
if (datalen < 2)
|
|
return NULL;
|
|
|
|
length = GST_READ_UINT16_BE (data);
|
|
if (datalen < (2 + length))
|
|
return NULL;
|
|
|
|
if (p_total_len)
|
|
*p_total_len = 2 + length;
|
|
|
|
return g_strndup ((gchar *) data + 2, length);
|
|
}
|
|
|
|
GstTagList *
|
|
gst_rm_utils_read_tags (const guint8 * data, guint datalen,
|
|
GstRmUtilsStringReadFunc read_string_func)
|
|
{
|
|
const gchar *gst_tags[] = { GST_TAG_TITLE, GST_TAG_ARTIST,
|
|
GST_TAG_COPYRIGHT, GST_TAG_COMMENT
|
|
};
|
|
GstTagList *tags;
|
|
guint i;
|
|
|
|
g_assert (read_string_func != NULL);
|
|
|
|
GST_DEBUG ("File Content : (CONT) len = %d", datalen);
|
|
|
|
tags = gst_tag_list_new ();
|
|
|
|
for (i = 0; i < G_N_ELEMENTS (gst_tags); ++i) {
|
|
gchar *str = NULL;
|
|
guint total_length = 0;
|
|
|
|
str = read_string_func (data, datalen, &total_length);
|
|
data += total_length;
|
|
datalen -= total_length;
|
|
|
|
if (str != NULL && !g_utf8_validate (str, -1, NULL)) {
|
|
const gchar *encoding;
|
|
gchar *tmp;
|
|
|
|
encoding = g_getenv ("GST_TAG_ENCODING");
|
|
if (encoding == NULL || *encoding == '\0') {
|
|
if (g_get_charset (&encoding))
|
|
encoding = "ISO-8859-15";
|
|
}
|
|
GST_DEBUG ("converting tag from %s to UTF-8", encoding);
|
|
tmp = g_convert_with_fallback (str, -1, "UTF-8", encoding, "*",
|
|
NULL, NULL, NULL);
|
|
g_free (str);
|
|
str = tmp;
|
|
}
|
|
|
|
GST_DEBUG ("%s = %s", gst_tags[i], GST_STR_NULL (str));
|
|
if (str != NULL && *str != '\0') {
|
|
gst_tag_list_add (tags, GST_TAG_MERGE_APPEND, gst_tags[i], str, NULL);
|
|
}
|
|
g_free (str);
|
|
}
|
|
|
|
if (gst_structure_n_fields ((GstStructure *) tags) > 0)
|
|
return tags;
|
|
|
|
gst_tag_list_free (tags);
|
|
return NULL;
|
|
}
|