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tag: use BOM to recognize UTF-16/32 encoding and convert accordingly

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This commit is contained in:
Mark Nauwelaerts 2009-10-08 14:16:44 +02:00
parent 34480029fb
commit e18b42c0b6
1 changed files with 46 additions and 0 deletions
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46
gst-libs/gst/tag/tags.c
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@ -288,6 +288,52 @@ gst_tag_freeform_string_to_utf8 (const gchar * data, gint size,
goto beach;
}
/* check for and use byte-order-mark for UTF-16/32 cases */
if (size >= 2) {
gchar *c = NULL;
gint prefix, ssize;
if (size >= 4) {
prefix = 4;
ssize = GST_ROUND_DOWN_4 (size - 4);
switch (GST_READ_UINT32_BE (data)) {
case 0x0000FEFF:
c = "UTF-32BE";
break;
case 0xFFFE0000:
c = "UTF-32LE";
break;
default:
break;
}
}
if (!c) {
prefix = 2;
ssize = GST_ROUND_DOWN_2 (size - 2);
switch (GST_READ_UINT16_BE (data)) {
case 0xFEFF:
c = "UTF-16BE";
break;
case 0xFFFE:
c = "UTF-16LE";
break;
default:
break;
}
}
if (c) {
GST_LOG ("Trying to convert freeform string to UTF-8 from '%s'", c);
if ((utf8 =
g_convert (data + prefix, ssize, "UTF-8", c, &bytes_read, NULL,
NULL))) {
if (bytes_read == ssize)
goto beach;
g_free (utf8);
utf8 = NULL;
}
}
}
while (env_vars && *env_vars != NULL) {
const gchar *env = NULL;