gst-libs/gst/riff/riff-read.*: Add _peek version (req'ed in CDXA).

Original commit message from CVS:
* gst-libs/gst/riff/riff-read.c: (gst_riff_peek_element_data),
(gst_riff_read_element_data):
* gst-libs/gst/riff/riff-read.h:
Add _peek version (req'ed in CDXA).
* gst/cdxaparse/gstcdxaparse.c: (gst_cdxaparse_init),
(gst_cdxaparse_loop):
Fix parsing in playbin.
* gst/playback/gstdecodebin.c: (close_pad_link):
Ignore current_ pads, they cause major annoyance.

2 files changed, 22 insertions, 5 deletions

diff --git a/gst-libs/gst/riff/riff-read.c b/gst-libs/gst/riff/riff-read.c
index 4d379a7b..fbbbae26 100644
--- a/gst-libs/gst/riff/riff-read.c
+++ b/gst-libs/gst/riff/riff-read.c
@@ -260,7 +260,7 @@ gst_riff_peek_head (GstRiffRead * riff,
  */
 
 GstBuffer *
-gst_riff_read_element_data (GstRiffRead * riff, guint length, guint * got_bytes)
+gst_riff_peek_element_data (GstRiffRead * riff, guint length, guint * got_bytes)
 {
   GstBuffer *buf = NULL;
   guint32 got;
@@ -272,14 +272,28 @@ gst_riff_read_element_data (GstRiffRead * riff, guint length, guint * got_bytes)
       return NULL;
   }
 
+  if (got_bytes)
+    *got_bytes = got;
+
+  return buf;
+}
+
+GstBuffer *
+gst_riff_read_element_data (GstRiffRead * riff, guint length, guint * got_bytes)
+{
+  GstBuffer *buf;
+
+  if (!(buf = gst_riff_peek_element_data (riff, length, got_bytes)))
+    return NULL;
+
   /* we need 16-bit alignment */
   if (length & 1)
     length++;
 
-  gst_bytestream_flush (riff->bs, length);
-
-  if (got_bytes)
-    *got_bytes = got;
+  if (!gst_bytestream_flush (riff->bs, length)) {
+    gst_buffer_unref (buf);
+    return NULL;
+  }
 
   return buf;
 }
diff --git a/gst-libs/gst/riff/riff-read.h b/gst-libs/gst/riff/riff-read.h
index d44c4ed7..a0c12606 100644
--- a/gst-libs/gst/riff/riff-read.h
+++ b/gst-libs/gst/riff/riff-read.h
@@ -85,6 +85,9 @@ gboolean gst_riff_read_header    (GstRiffRead *read,
 GstBuffer *gst_riff_read_element_data (GstRiffRead *riff,
 				       guint        length,
 				       guint       *got_bytes);
+GstBuffer *gst_riff_peek_element_data (GstRiffRead *riff,
+				       guint        length,
+				       guint       *got_bytes);
 /*
  * Utility functions (including byteswapping).
  */