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id3demux: Sanitize id3 frame names

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This is similar to what is done in qtdemux. Avoids providing invalid
structure/tags names
This commit is contained in:
Edward Hervey 2010-09-24 15:19:15 +02:00
parent c6c941f315
commit 87a9d7f679
1 changed files with 24 additions and 0 deletions
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24
gst/id3demux/id3tags.c
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@ -340,6 +340,7 @@ id3demux_add_id3v2_frame_blob_to_taglist (ID3TagsWorking * work, guint size)
guint8 *frame_data;
gchar *media_type;
guint frame_size, header_size;
guint i;
switch (ID3V2_VER_MAJOR (work->hdr.version)) {
case 1:
@ -360,6 +361,12 @@ id3demux_add_id3v2_frame_blob_to_taglist (ID3TagsWorking * work, guint size)
blob = gst_buffer_new_and_alloc (frame_size);
memcpy (GST_BUFFER_DATA (blob), frame_data, frame_size);
/* Sanitize frame id */
for (i = 0; i < 4; i++) {
if (!g_ascii_isalnum (frame_data[i]))
frame_data[i] = '_';
}
media_type = g_strdup_printf ("application/x-gst-id3v2-%c%c%c%c-frame",
g_ascii_tolower (frame_data[0]), g_ascii_tolower (frame_data[1]),
g_ascii_tolower (frame_data[2]), g_ascii_tolower (frame_data[3]));
@ -418,6 +425,7 @@ id3demux_id3v2_frames_to_tag_list (ID3TagsWorking * work, guint size)
guint16 frame_flags = 0x0;
gboolean obsolete_id = FALSE;
gboolean read_synch_size = TRUE;
guint i;
/* Read the header */
switch (ID3V2_VER_MAJOR (work->hdr.version)) {
@ -467,6 +475,22 @@ id3demux_id3v2_frames_to_tag_list (ID3TagsWorking * work, guint size)
if (frame_size > work->hdr.frame_data_size || strcmp (frame_id, "") == 0)
break; /* No more frames to read */
/* Sanitize frame id */
switch (ID3V2_VER_MAJOR (work->hdr.version)) {
case 0:
case 1:
case 2:
for (i = 0; i < 3; i++) {
if (!g_ascii_isalnum (frame_id[i]))
frame_id[i] = '_';
}
break;
default:
for (i = 0; i < 4; i++) {
if (!g_ascii_isalnum (frame_id[i]))
frame_id[i] = '_';
}
}
#if 1
GST_LOG
("Frame @ %ld (0x%02lx) id %s size %u, next=%ld (0x%02lx) obsolete=%d",