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* gst/id3demux/id3v2frames.c: (find_utf16_bom),

Browse Source 
(parse_insert_string_field), (parse_split_strings):
	Rework string parsing to always walk over BOM markers in UTF16
	strings, using the endianness indicated by the innermost one,
	then trying the opposite endianness if that fails to convert
	to valid UTF-8. Fixes #341774

Bump the PORTREVISION.

PR:		ports/98090
Submitted by:	Khairil Yusof <kaeru@inigo-tech.com>
Obtained from:	CVS
GNOME Bugzilla:	http://bugzilla.gnome.org/show_bug.cgi?id=341774
This commit is contained in:
Jeremy Messenger 2006-06-05 03:23:59 +00:00
parent e663e754ee
commit d87fe96dc9
Notes: svn2git 2021-03-31 03:12:20 +00:00 
svn path=/head/; revision=164378
2 changed files with 175 additions and 1 deletions
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2
multimedia/gstreamer-plugins-good/Makefile
View File

@ -6,7 +6,7 @@
# $MCom: ports/multimedia/gstreamer-plugins-good/Makefile,v 1.5 2006/04/02 07:33:41 marcus Exp $
#
PORTREVISION= 3
PORTREVISION= 4
CATEGORIES= multimedia
COMMENT= Good gstreamer-plugins

174
multimedia/gstreamer-plugins-good/files/patch-gst_id3demux_id3v2frames.c Normal file
View File

@ -0,0 +1,174 @@
diff -u -r1.16 id3v2frames.c
--- gst/id3demux/id3v2frames.c 10 May 2006 13:51:01 -0000 1.16
+++ gst/id3demux/id3v2frames.c 15 May 2006 09:48:46 -0000
@@ -667,33 +667,21 @@
return result;
}
-static void
-parse_insert_string_field (const gchar * encoding, gchar * data, gint data_size,
- GArray * fields)
-{
- gchar *field;
-
- field = g_convert (data, data_size, "UTF-8", encoding, NULL, NULL, NULL);
- if (field && !g_utf8_validate (field, -1, NULL)) {
- GST_DEBUG ("%s was bad UTF-8. Ignoring", field);
- g_free (field);
- field = NULL;
- }
- if (field)
- g_array_append_val (fields, field);
-}
+static const gchar utf16enc[] = "UTF-16";
+static const gchar utf16leenc[] = "UTF-16LE";
+static const gchar utf16beenc[] = "UTF-16BE";
static gboolean
-has_utf16_bom (gchar * data, const gchar ** p_in_encoding)
+find_utf16_bom (gchar * data, const gchar ** p_in_encoding)
{
guint16 marker = (GST_READ_UINT8 (data) << 8) | GST_READ_UINT8 (data + 1);
switch (marker) {
case 0xFFFE:
- *p_in_encoding = "UTF16LE";
+ *p_in_encoding = utf16leenc;
return TRUE;
case 0xFEFF:
- *p_in_encoding = "UTF16BE";
+ *p_in_encoding = utf16beenc;
return TRUE;
default:
break;
@@ -702,6 +690,63 @@
}
static void
+parse_insert_string_field (guint8 encoding, gchar * data, gint data_size,
+ GArray * fields)
+{
+ gchar *field = NULL;
+
+ switch (encoding) {
+ case ID3V2_ENCODING_UTF16:
+ case ID3V2_ENCODING_UTF16BE:
+ {
+ const gchar *in_encode;
+
+ if (encoding == ID3V2_ENCODING_UTF16)
+ in_encode = utf16enc;
+ else
+ in_encode = utf16beenc;
+
+ /* Sometimes we see strings with multiple BOM markers at the start.
+ * In that case, we assume the innermost one is correct. If that fails
+ * to produce valid UTF-8, we try the other endianness anyway */
+ while (data_size > 2 && find_utf16_bom (data, &in_encode)) {
+ data += 2; /* skip BOM */
+ data_size -= 2;
+ }
+
+ field = g_convert (data, data_size, "UTF-8", in_encode, NULL, NULL, NULL);
+
+ if (field == NULL || g_utf8_validate (field, -1, NULL) == FALSE) {
+ /* As a fallback, try interpreting UTF-16 in the other endianness */
+ if (in_encode == utf16beenc)
+ field = g_convert (data, data_size, "UTF-8", utf16leenc,
+ NULL, NULL, NULL);
+ }
+ }
+
+ break;
+ case ID3V2_ENCODING_ISO8859:
+ field = g_convert (data, data_size, "UTF-8", "ISO-8859-1",
+ NULL, NULL, NULL);
+ break;
+ default:
+ field = g_strndup (data, data_size);
+ break;
+ }
+
+ if (field) {
+ if (g_utf8_validate (field, -1, NULL)) {
+ g_array_append_val (fields, field);
+ return;
+ }
+
+ GST_DEBUG ("%s was bad UTF-8 after conversion from encoding %d. Ignoring",
+ field, encoding);
+ g_free (field);
+ }
+}
+
+static void
parse_split_strings (guint8 encoding, gchar * data, gint data_size,
GArray ** out_fields)
{
@@ -715,13 +760,13 @@
case ID3V2_ENCODING_ISO8859:
for (text_pos = 0; text_pos < data_size; text_pos++) {
if (data[text_pos] == 0) {
- parse_insert_string_field ("ISO-8859-1", data + prev,
+ parse_insert_string_field (encoding, data + prev,
text_pos - prev + 1, fields);
prev = text_pos + 1;
}
}
if (data_size - prev > 0 && data[prev] != 0x00) {
- parse_insert_string_field ("ISO-8859-1", data + prev,
+ parse_insert_string_field (encoding, data + prev,
data_size - prev, fields);
}
@@ -729,34 +774,24 @@
case ID3V2_ENCODING_UTF8:
for (prev = 0, text_pos = 0; text_pos < data_size; text_pos++) {
if (data[text_pos] == '\0') {
- parse_insert_string_field ("UTF-8", data + prev,
+ parse_insert_string_field (encoding, data + prev,
text_pos - prev + 1, fields);
prev = text_pos + 1;
}
}
if (data_size - prev > 0 && data[prev] != 0x00) {
- parse_insert_string_field ("UTF-8", data + prev,
+ parse_insert_string_field (encoding, data + prev,
data_size - prev, fields);
}
break;
case ID3V2_ENCODING_UTF16:
case ID3V2_ENCODING_UTF16BE:
{
- const gchar *in_encode;
-
- if (encoding == ID3V2_ENCODING_UTF16)
- in_encode = "UTF-16";
- else
- in_encode = "UTF-16BE";
-
/* Find '\0\0' terminator */
for (text_pos = 0; text_pos < data_size - 1; text_pos += 2) {
if (data[text_pos] == '\0' && data[text_pos + 1] == '\0') {
- if (has_utf16_bom (data + prev, &in_encode)) {
- prev += 2; /* skip BOM */
- }
/* found a delimiter */
- parse_insert_string_field (in_encode, data + prev,
+ parse_insert_string_field (encoding, data + prev,
text_pos - prev + 2, fields);
text_pos++; /* Advance to the 2nd NULL terminator */
prev = text_pos + 1;
@@ -765,11 +800,8 @@
}
if (data_size - prev > 1 &&
(data[prev] != 0x00 || data[prev + 1] != 0x00)) {
- if (has_utf16_bom (data + prev, &in_encode)) {
- prev += 2; /* skip BOM */
- }
/* There were 2 or more non-null chars left, convert those too */
- parse_insert_string_field (in_encode, data + prev,
+ parse_insert_string_field (encoding, data + prev,
data_size - prev, fields);
}
break;