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qtdemux: handle tags in mac encoding

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Check the charset from (C)*** tags and set the charset
to convert from MAC encoding if suitable.

https://bugzilla.gnome.org/show_bug.cgi?id=723166
This commit is contained in:
Thiago Santos 2014-02-13 12:29:13 -03:00
parent fdb39a9f7b
commit 7f1d51ba90
1 changed files with 38 additions and 4 deletions
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42
gst/isomp4/qtdemux.c
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@ -9098,6 +9098,7 @@ qtdemux_tag_add_str_full (GstQTDemux * qtdemux, const char *tag,
guint32 type;
int offset;
gboolean ret = TRUE;
const gchar *charset = NULL;
data = qtdemux_tree_get_child_by_type (node, FOURCC_data);
if (data) {
@ -9119,10 +9120,30 @@ qtdemux_tag_add_str_full (GstQTDemux * qtdemux, const char *tag,
len = QT_UINT32 (node->data);
type = QT_UINT32 ((guint8 *) node->data + 4);
if ((type >> 24) == 0xa9) {
/* Type starts with the (C) symbol, so the next 32 bits are
* the language code, which we ignore */
gint str_len;
gint lang_code;
/* Type starts with the (C) symbol, so the next data is a list
* of (string size(16), language code(16), string) */
str_len = QT_UINT16 ((guint8 *) node->data + 8);
lang_code = QT_UINT16 ((guint8 *) node->data + 10);
/* the string + fourcc + size + 2 16bit fields,
* means that there are more tags in this atom */
if (len > str_len + 8 + 4) {
/* TODO how to represent the same tag in different languages? */
GST_WARNING_OBJECT (qtdemux, "Ignoring metadata entry with multiple "
"text alternatives, reading only first one");
}
offset = 12;
len = str_len + 8 + 4; /* remove trailing strings that we don't use */
GST_DEBUG_OBJECT (qtdemux, "found international text tag");
if (lang_code < 0x800) { /* MAC encoded string */
charset = "mac";
}
} else if (len > 14 && qtdemux_is_string_tag_3gp (qtdemux,
QT_FOURCC ((guint8 *) node->data + 4))) {
guint32 type = QT_UINT32 ((guint8 *) node->data + 8);
@ -9144,8 +9165,21 @@ qtdemux_tag_add_str_full (GstQTDemux * qtdemux, const char *tag,
GST_DEBUG_OBJECT (qtdemux, "found normal text tag");
ret = FALSE; /* may have to fallback */
}
s = gst_tag_freeform_string_to_utf8 ((char *) node->data + offset,
len - offset, env_vars);
if (charset) {
GError *err = NULL;
s = g_convert ((gchar *) node->data + offset, len - offset, "utf8",
charset, NULL, NULL, &err);
if (err) {
GST_DEBUG_OBJECT (qtdemux, "Failed to convert string from charset %s:"
" %s(%d): %s", charset, g_quark_to_string (err->domain), err->code,
err->message);
g_error_free (err);
}
} else {
s = gst_tag_freeform_string_to_utf8 ((char *) node->data + offset,
len - offset, env_vars);
}
if (s) {
GST_DEBUG_OBJECT (qtdemux, "adding tag %s", GST_STR_NULL (s));
gst_tag_list_add (qtdemux->tag_list, GST_TAG_MERGE_REPLACE, tag, s, NULL);