Make sure that the Bit/BitReader buffer is not GC'd before we stop using it

Also add a property to get the used buffer.

gstreamer-sharp/BitReader.custom

@@ -0,0 +1,15 @@
+Gst.Buffer buffer = null;
+public Gst.Buffer Buffer {
+  get {
+    return buffer;
+  }
+}
+
+[DllImport ("libgstbase-0.10.dll", CallingConvention = CallingConvention.Cdecl) ]
+static extern IntPtr gst_bit_reader_new_from_buffer (IntPtr buffer);
+
+public BitReader (Gst.Buffer buffer) {
+  Raw = gst_bit_reader_new_from_buffer (buffer == null ? IntPtr.Zero : buffer.Handle);
+  this.buffer = buffer;
+}
+

gstreamer-sharp/ByteReader.custom

@@ -1,3 +1,19 @@
+Gst.Buffer buffer = null;
+public Gst.Buffer Buffer {
+  get {
+    return buffer;
+  }
+}
+
+[DllImport("libgstbase-0.10.dll", CallingConvention = CallingConvention.Cdecl)]
+static extern IntPtr gst_byte_reader_new_from_buffer(IntPtr buffer);
+
+public ByteReader (Gst.Buffer buffer)
+{
+  Raw = gst_byte_reader_new_from_buffer(buffer == null ? IntPtr.Zero : buffer.Handle);
+  this.buffer = buffer;
+}
+
 [DllImport ("libgstbase-0.10.dll", CallingConvention = CallingConvention.Cdecl) ]
 static extern bool gst_byte_reader_peek_data (IntPtr raw, uint size, out IntPtr val);
 

gstreamer-sharp/Gstreamer.metadata

@@ -1068,6 +1068,7 @@
   <attr path="/api/namespace/struct[@cname='GstBitReader']/method[@cname='gst_bit_reader_init']" name="hidden">1</attr>
   <attr path="/api/namespace/struct[@cname='GstBitReader']/method[@cname='gst_bit_reader_init_from_buffer']" name="hidden">1</attr>
   <attr path="/api/namespace/struct[@cname='GstBitReader']/constructor[@cname='gst_bit_reader_new']" name="hidden">1</attr>
+  <attr path="/api/namespace/struct[@cname='GstBitReader']/constructor[@cname='gst_bit_reader_new_from_buffer']" name="hidden">1</attr>
   <attr path="/api/namespace/struct[@cname='GstBitReader']/method[@cname='gst_bit_reader_get_bits_uint8']" name="name">Get</attr>
   <attr path="/api/namespace/struct[@cname='GstBitReader']/method[@cname='gst_bit_reader_get_bits_uint16']" name="name">Get</attr>
   <attr path="/api/namespace/struct[@cname='GstBitReader']/method[@cname='gst_bit_reader_get_bits_uint32']" name="name">Get</attr>
@@ -1080,6 +1081,7 @@
   <attr path="/api/namespace/struct[@cname='GstByteReader']/method[@cname='gst_byte_reader_init']" name="hidden">1</attr>
   <attr path="/api/namespace/struct[@cname='GstByteReader']/method[@cname='gst_byte_reader_init_from_buffer']" name="hidden">1</attr>
   <attr path="/api/namespace/struct[@cname='GstByteReader']/constructor[@cname='gst_byte_reader_new']" name="hidden">1</attr>
+  <attr path="/api/namespace/struct[@cname='GstByteReader']/constructor[@cname='gst_byte_reader_new_from_buffer']" name="hidden">1</attr>
   <attr path="/api/namespace/struct[@cname='GstByteReader']/method[@cname='gst_byte_reader_peek_uint8']" name="name">PeekUInt8</attr>
   <attr path="/api/namespace/struct[@cname='GstByteReader']/method[@cname='gst_byte_reader_peek_uint16_le']" name="name">PeekUInt16Le</attr>
   <attr path="/api/namespace/struct[@cname='GstByteReader']/method[@cname='gst_byte_reader_peek_uint16_be']" name="name">PeekUInt16Be</attr>

gstreamer-sharp/Makefile.am

@@ -115,6 +115,7 @@ customs = 			\
 	Controller.custom	\
 	ControlSource.custom	\
 	VideoUtil.custom	\
+	BitReader.custom        \
 	ByteReader.custom
 
 plugin_csfiles = $(builddir)/coreplugins/generated/*.cs \