add comments. refine naming

@@ -28,7 +28,11 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #include <srs_core.hpp>
 */
 
-// user must include the srs_core.hpp before any header.
+/**
+* the core provides the common defined macros, utilities,
+* user must include the srs_core.hpp before any header, or maybe 
+* build failed.
+*/
 
 // for int64_t print using PRId64 format.
 #ifndef __STDC_FORMAT_MACROS
@@ -36,6 +40,6 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #endif
 
 #include <assert.h>
-#define SrsAssert(expression) assert(expression)
+#define srs_assert(expression) assert(expression)
 
 #endif
\ No newline at end of file

@@ -36,10 +36,10 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 * auto free the instance in the current scope.
 */
 #define SrsAutoFree(className, instance, is_array) \
-	c__SrsAutoFree<className> _auto_free_##instance(&instance, is_array)
+	__SrsAutoFree<className> _auto_free_##instance(&instance, is_array)
     
 template<class T>
-class c__SrsAutoFree
+class __SrsAutoFree
 {
 private:
     T** ptr;
@@ -49,12 +49,12 @@ public:
     * auto delete the ptr.
     * @is_array a bool value indicates whether the ptr is a array.
     */
-    c__SrsAutoFree(T** _ptr, bool _is_array){
+    __SrsAutoFree(T** _ptr, bool _is_array){
         ptr = _ptr;
         is_array = _is_array;
     }
     
-    virtual ~c__SrsAutoFree(){
+    virtual ~__SrsAutoFree(){
         if (ptr == NULL || *ptr == NULL) {
             return;
         }

@@ -22,3 +22,12 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 
 #include <srs_core_buffer.hpp>
+
+SrsBuffer::SrsBuffer()
+{
+}
+
+SrsBuffer::~SrsBuffer()
+{
+}
+

@@ -30,4 +30,16 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 #include <srs_core.hpp>
 
+/**
+* the buffer provices bytes cache for protocol. generally, 
+* protocol recv data from socket, put into buffer, decode to RTMP message.
+* protocol encode RTMP message to bytes, put into buffer, send to socket.
+*/
+class SrsBuffer
+{
+public:
+	SrsBuffer();
+	virtual ~SrsBuffer();
+};
+
 #endif
\ No newline at end of file

@@ -33,6 +33,10 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #include <srs_core_conn.hpp>
 
 class SrsRtmp;
+
+/**
+* the client provides the main logic control for RTMP clients.
+*/
 class SrsClient : public SrsConnection
 {
 private:

@@ -83,7 +83,7 @@ void SrsConnection::cycle()
 void* SrsConnection::cycle_thread(void* arg)
 {
 	SrsConnection* conn = (SrsConnection*)arg;
-	SrsAssert(conn != NULL);
+	srs_assert(conn != NULL);
 	
 	conn->cycle();
 	

@@ -32,6 +32,11 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 #include <st.h>
 
+/**
+* the protocol provides the rtmp-message-protocol services,
+* to recv RTMP message from RTMP chunk stream,
+* and to send out RTMP message over RTMP chunk stream.
+*/
 class SrsProtocol
 {
 private:

@@ -34,13 +34,19 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 #include <st.h>
 
+class SrsProtocol;
+
 struct SrsApp
 {
 	std::string vhost;
 	std::string app;
 };
 
-class SrsProtocol;
+/**
+* the rtmp provices rtmp-command-protocol services,
+* a high level protocol, media stream oriented services,
+* such as connect to vhost/app, play stream, get audio/video data.
+*/
 class SrsRtmp
 {
 private:

@@ -203,7 +203,7 @@ void SrsServer::listen_cycle()
 void* SrsServer::listen_thread(void* arg)
 {
 	SrsServer* server = (SrsServer*)arg;
-	SrsAssert(server != NULL);
+	srs_assert(server != NULL);
 	
 	server->listen_cycle();
 	

@@ -32,7 +32,10 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 #include <st.h>
 
-// the socket base on st.
+/**
+* the socket provides TCP socket over st,
+* that is, the sync socket mechanism.
+*/
 class Socket
 {
 private: