diff --git a/trunk/doc/amf0_spec_121207.pdf b/trunk/doc/amf0_spec_121207.pdf
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index 000000000..ec0e9b8e0
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diff --git a/trunk/doc/amf3_spec_121207.pdf b/trunk/doc/amf3_spec_121207.pdf
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index 000000000..3c11d7f48
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diff --git a/trunk/doc/rtmp.part1.Chunk-Stream.pdf b/trunk/doc/rtmp.part1.Chunk-Stream.pdf
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index 000000000..d1338cf05
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diff --git a/trunk/doc/rtmp.part2.Message-Formats.pdf b/trunk/doc/rtmp.part2.Message-Formats.pdf
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index 000000000..a9957a5a5
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diff --git a/trunk/doc/rtmp.part3.Commands-Messages.pdf b/trunk/doc/rtmp.part3.Commands-Messages.pdf
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index 000000000..9f36c4385
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diff --git a/trunk/doc/rtmp_specification_1.0.pdf b/trunk/doc/rtmp_specification_1.0.pdf
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index 000000000..506eb2ae2
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diff --git a/trunk/doc/video_file_format_spec_v10_1.pdf b/trunk/doc/video_file_format_spec_v10_1.pdf
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index 000000000..262cff488
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diff --git a/trunk/src/core/srs_core_protocol.cpp b/trunk/src/core/srs_core_protocol.cpp
index 9eb2ce52b..4f4cc8044 100755
--- a/trunk/src/core/srs_core_protocol.cpp
+++ b/trunk/src/core/srs_core_protocol.cpp
@@ -37,3 +37,17 @@ SrsProtocol::~SrsProtocol()
 {
 }
 
+int SrsProtocol::recv_message(SrsMessage** pmsg)
+{
+	int ret = ERROR_SUCCESS;
+	return ret;
+}
+
+SrsMessage::SrsMessage()
+{
+}
+
+SrsMessage::~SrsMessage()
+{
+}
+
diff --git a/trunk/src/core/srs_core_protocol.hpp b/trunk/src/core/srs_core_protocol.hpp
index 43d7de56b..367506f42 100755
--- a/trunk/src/core/srs_core_protocol.hpp
+++ b/trunk/src/core/srs_core_protocol.hpp
@@ -32,6 +32,8 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 #include <st.h>
 
+class SrsMessage;
+
 /**
 * the protocol provides the rtmp-message-protocol services,
 * to recv RTMP message from RTMP chunk stream,
@@ -44,6 +46,15 @@ private:
 public:
 	SrsProtocol(st_netfd_t client_stfd);
 	virtual ~SrsProtocol();
+public:
+	virtual int recv_message(SrsMessage** pmsg);
+};
+
+class SrsMessage
+{
+public:
+	SrsMessage();
+	virtual ~SrsMessage();
 public:
 };