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-rw-r--r--gst/mpegaudioparse/gstmp3types.c31
1 files changed, 30 insertions, 1 deletions
diff --git a/gst/mpegaudioparse/gstmp3types.c b/gst/mpegaudioparse/gstmp3types.c
index efb9fd5b..75391a0d 100644
--- a/gst/mpegaudioparse/gstmp3types.c
+++ b/gst/mpegaudioparse/gstmp3types.c
@@ -19,6 +19,7 @@
//#define DEBUG_ENABLED
#include <gst/gst.h>
+#include <string.h> /* memcmp */
static GstCaps* mp3_typefind(GstBuffer *buf, gpointer private);
@@ -30,10 +31,38 @@ static GstTypeDefinition mp3type_definitions[] = {
static GstCaps*
mp3_typefind(GstBuffer *buf, gpointer private)
{
- gulong head = GULONG_FROM_BE(*((gulong *)GST_BUFFER_DATA(buf)));
+ gchar *data;
+ gulong head;
+
+ data = GST_BUFFER_DATA(buf);
GstCaps *caps;
GST_DEBUG (0,"mp3typefind: typefind\n");
+
+ /* check for ID3 Tag first and forward ID3 length */
+ if (!memcmp (data, "ID3", 3))
+ {
+ guint32 skip;
+ /* ignore next 3 bytes */
+ data += 6;
+ /* if you want that thing faster, do it */
+ skip = GUINT32_FROM_BE(*((guint32 *)data));
+ skip = (((skip & 0x7f000000) >> 3) |
+ ((skip & 0x007f0000) >> 2) |
+ ((skip & 0x00007f00) >> 1) |
+ ((skip & 0x0000007f) >> 0)) + 4
+ GST_DEBUG (0, "mp3typefind: detected ID3 Tag with %u bytes\n", skip + 6);
+ /* return if buffer is not big enough */
+ if (GST_BUFFER_SIZE (buf) < skip + 10)
+ {
+ GST_DEBUG (0, "mp3typefind: buffer too small to go on typefinding\n", skip + 6);
+ return NULL;
+ }
+ data += skip;
+ }
+
+ /* now with the right postion, do typefinding */
+ head = GULONG_FROM_BE(*((gulong *)data));
if ((head & 0xffe00000) != 0xffe00000)
return NULL;
if (!((head >> 17) & 3))