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-rw-r--r--gst/id3demux/id3tags.c7
-rw-r--r--gst/id3demux/id3tags.h2
-rw-r--r--gst/id3demux/id3v2frames.c28
-rw-r--r--tests/check/elements/id3demux.c54
-rw-r--r--tests/files/Makefile.am1
-rw-r--r--tests/files/id3-588148-unsynced-v24.tagbin0 -> 39000 bytes
6 files changed, 80 insertions, 12 deletions
diff --git a/gst/id3demux/id3tags.c b/gst/id3demux/id3tags.c
index 1d511f33..96d25521 100644
--- a/gst/id3demux/id3tags.c
+++ b/gst/id3demux/id3tags.c
@@ -97,7 +97,7 @@ id3demux_calc_id3v2_tag_size (GstBuffer * buf)
return size;
}
-static guint8 *
+guint8 *
id3demux_ununsync_data (const guint8 * unsync_data, guint32 * size)
{
const guint8 *end;
@@ -195,7 +195,10 @@ id3demux_read_id3v2_tag (GstBuffer * buffer, guint * id3v2_size,
else
work.hdr.frame_data_size = read_size - ID3V2_HDR_SIZE;
- if ((flags & ID3V2_HDR_FLAG_UNSYNC)) {
+ /* in v2.3 the frame sizes are not syncsafe, so the entire tag had to be
+ * unsynced. In v2.4 the frame sizes are syncsafe so it's just the frame
+ * data that needs un-unsyncing, but not the frame headers. */
+ if ((flags & ID3V2_HDR_FLAG_UNSYNC) != 0 && ID3V2_VER_MAJOR (version) <= 3) {
GST_DEBUG ("Un-unsyncing entire tag");
uu_data = id3demux_ununsync_data (work.hdr.frame_data,
&work.hdr.frame_data_size);
diff --git a/gst/id3demux/id3tags.h b/gst/id3demux/id3tags.h
index b5bc950d..14a42de3 100644
--- a/gst/id3demux/id3tags.h
+++ b/gst/id3demux/id3tags.h
@@ -115,6 +115,8 @@ enum {
/* From id3v2frames.c */
gboolean id3demux_id3v2_parse_frame (ID3TagsWorking *work);
+guint8 * id3demux_ununsync_data (const guint8 * unsync_data, guint32 * size);
+
G_END_DECLS
#endif
diff --git a/gst/id3demux/id3v2frames.c b/gst/id3demux/id3v2frames.c
index 377d84cf..a0331ef3 100644
--- a/gst/id3demux/id3v2frames.c
+++ b/gst/id3demux/id3v2frames.c
@@ -73,6 +73,7 @@ id3demux_id3v2_parse_frame (ID3TagsWorking * work)
guint frame_data_size = work->cur_frame_size;
gchar *tag_str = NULL;
GArray *tag_fields = NULL;
+ guint8 *uu_data = NULL;
#ifdef HAVE_ZLIB
guint8 *uncompressed_data = NULL;
@@ -86,17 +87,14 @@ id3demux_id3v2_parse_frame (ID3TagsWorking * work)
}
}
- /* Can't handle encrypted frames right now */
+ /* Can't handle encrypted frames right now (in case we ever do, we'll have
+ * to do the decryption after the un-unsynchronisation and decompression,
+ * not here) */
if (work->frame_flags & ID3V2_FRAME_FORMAT_ENCRYPTION) {
GST_WARNING ("Encrypted frames are not supported");
return FALSE;
}
- if (work->frame_flags & ID3V2_FRAME_FORMAT_UNSYNCHRONISATION) {
- GST_WARNING ("ID3v2 frame with unsupported unsynchronisation applied. "
- "May fail badly");
- }
-
tag_name = gst_tag_from_id3_tag (work->frame_id);
if (tag_name == NULL &&
strncmp (work->frame_id, "RVA2", 4) != 0 &&
@@ -120,6 +118,19 @@ id3demux_id3v2_parse_frame (ID3TagsWorking * work)
}
}
+ /* in v2.3 the frame sizes are not syncsafe, so the entire tag had to be
+ * unsynced. In v2.4 the frame sizes are syncsafe so it's just the frame
+ * data that needs un-unsyncing, but not the frame headers. */
+ if (ID3V2_VER_MAJOR (work->hdr.version) == 4) {
+ if ((work->hdr.flags & ID3V2_HDR_FLAG_UNSYNC) != 0 ||
+ ((work->frame_flags & ID3V2_FRAME_FORMAT_UNSYNCHRONISATION) != 0)) {
+ GST_DEBUG ("Un-unsyncing frame %s", work->frame_id);
+ uu_data = id3demux_ununsync_data (frame_data, &frame_data_size);
+ frame_data = uu_data;
+ GST_MEMDUMP ("ID3v2 frame (un-unsyced)", frame_data, frame_data_size);
+ }
+ }
+
work->parse_size = frame_data_size;
if (work->frame_flags & ID3V2_FRAME_FORMAT_COMPRESSION) {
@@ -134,6 +145,7 @@ id3demux_id3v2_parse_frame (ID3TagsWorking * work)
if (uncompress (dest, &destSize, src, frame_data_size) != Z_OK) {
g_free (uncompressed_data);
+ g_free (uu_data);
return FALSE;
}
if (destSize != work->parse_size) {
@@ -141,12 +153,14 @@ id3demux_id3v2_parse_frame (ID3TagsWorking * work)
("Decompressing ID3v2 frame %s did not produce expected size %d bytes (got %lu)",
tag_name, work->parse_size, destSize);
g_free (uncompressed_data);
+ g_free (uu_data);
return FALSE;
}
work->parse_data = uncompressed_data;
#else
GST_WARNING ("Compressed ID3v2 tag frame could not be decompressed"
" because gstid3demux was compiled without zlib support");
+ g_free (uu_data);
return FALSE;
#endif
} else {
@@ -209,6 +223,8 @@ id3demux_id3v2_parse_frame (ID3TagsWorking * work)
free_tag_strings (tag_fields);
}
+ g_free (uu_data);
+
return result;
}
diff --git a/tests/check/elements/id3demux.c b/tests/check/elements/id3demux.c
index ef1d4538..724461bd 100644
--- a/tests/check/elements/id3demux.c
+++ b/tests/check/elements/id3demux.c
@@ -198,7 +198,7 @@ GST_START_TEST (test_wcop)
GST_END_TEST;
static void
-check_unsync (const GstTagList * tags, const gchar * file)
+check_unsync_v23 (const GstTagList * tags, const gchar * file)
{
gchar *album = NULL;
gchar *title = NULL;
@@ -220,9 +220,54 @@ check_unsync (const GstTagList * tags, const gchar * file)
g_free (artist);
}
-GST_START_TEST (test_unsync)
+GST_START_TEST (test_unsync_v23)
{
- run_check_for_file ("id3-577468-unsynced-tag.tag", check_unsync);
+ run_check_for_file ("id3-577468-unsynced-tag.tag", check_unsync_v23);
+}
+
+GST_END_TEST;
+
+static void
+check_unsync_v24 (const GstTagList * tags, const gchar * file)
+{
+ const GValue *val;
+ GstBuffer *buf;
+ gchar *album = NULL;
+ gchar *title = NULL;
+ gchar *artist = NULL;
+
+ fail_unless (gst_tag_list_get_string (tags, GST_TAG_TITLE, &title));
+ fail_unless (title != NULL);
+ fail_unless_equals_string (title, "Starlight");
+ g_free (title);
+
+ fail_unless (gst_tag_list_get_string (tags, GST_TAG_ALBUM, &album));
+ fail_unless (album != NULL);
+ fail_unless_equals_string (album, "L'albumRockVol.4 CD1");
+ g_free (album);
+
+ fail_unless (gst_tag_list_get_string (tags, GST_TAG_ARTIST, &artist));
+ fail_unless (artist != NULL);
+ fail_unless_equals_string (artist, "Muse");
+ g_free (artist);
+
+ val = gst_tag_list_get_value_index (tags, GST_TAG_IMAGE, 0);
+ fail_unless (val != NULL);
+ fail_unless (GST_VALUE_HOLDS_BUFFER (val));
+ buf = gst_value_get_buffer (val);
+ fail_unless (buf != NULL);
+ fail_unless (GST_BUFFER_CAPS (buf) != NULL);
+ fail_unless_equals_int (GST_BUFFER_SIZE (buf), 38022);
+ /* check for jpeg start/end markers */
+ fail_unless_equals_int (GST_BUFFER_DATA (buf)[0], 0xff);
+ fail_unless_equals_int (GST_BUFFER_DATA (buf)[1], 0xd8);
+ fail_unless_equals_int (GST_BUFFER_DATA (buf)[38020], 0xff);
+ fail_unless_equals_int (GST_BUFFER_DATA (buf)[38021], 0xd9);
+}
+
+GST_START_TEST (test_unsync_v24)
+{
+ run_check_for_file ("id3-588148-unsynced-v24.tag", check_unsync_v24);
}
GST_END_TEST;
@@ -236,7 +281,8 @@ id3demux_suite (void)
suite_add_tcase (s, tc_chain);
tcase_add_test (tc_chain, test_tdat_tyer);
tcase_add_test (tc_chain, test_wcop);
- tcase_add_test (tc_chain, test_unsync);
+ tcase_add_test (tc_chain, test_unsync_v23);
+ tcase_add_test (tc_chain, test_unsync_v24);
return s;
}
diff --git a/tests/files/Makefile.am b/tests/files/Makefile.am
index 73ab4f2d..a0a28293 100644
--- a/tests/files/Makefile.am
+++ b/tests/files/Makefile.am
@@ -5,6 +5,7 @@ EXTRA_DIST = \
id3-407349-2.tag \
id3-447000-wcop.tag \
id3-577468-unsynced-tag.tag \
+ id3-588148-unsynced-v24.tag \
pcm16sine.flv \
test-cert.pem \
test-key.pem
diff --git a/tests/files/id3-588148-unsynced-v24.tag b/tests/files/id3-588148-unsynced-v24.tag
new file mode 100644
index 00000000..099d930e
--- /dev/null
+++ b/tests/files/id3-588148-unsynced-v24.tag
Binary files differ
generated by cgit (git 2.34.1) at 2025-11-04 00:51:07 +0000