add shared ptr to video/audio/data

@@ -65,5 +65,6 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #define ERROR_SYSTEM_STREAM_INIT		400
 #define ERROR_SYSTEM_PACKET_INVALID		401
 #define ERROR_SYSTEM_CLIENT_INVALID		402
+#define ERROR_SYSTEM_ASSERT_FAILED		403
 
 #endif
\ No newline at end of file

@@ -29,6 +29,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #include <srs_core_socket.hpp>
 #include <srs_core_buffer.hpp>
 #include <srs_core_stream.hpp>
+#include <srs_core_auto_free.hpp>
 
 /****************************************************************************
 *****************************************************************************
@@ -319,10 +320,13 @@ int SrsProtocol::recv_message(SrsMessage** pmsg)
 	return ret;
 }
 
-int SrsProtocol::send_message(SrsMessage* msg)
+int SrsProtocol::send_message(SrsOutputableMessage* msg)
 {
 	int ret = ERROR_SUCCESS;
 	
+	// free msg whatever return value.
+	SrsAutoFree(SrsOutputableMessage, msg, false);
+	
 	if ((ret = msg->encode_packet()) != ERROR_SUCCESS) {
 		srs_error("encode packet to message payload failed. ret=%d", ret);
 		return ret;
@@ -475,15 +479,21 @@ int SrsProtocol::on_recv_message(SrsMessage* msg)
 	return ret;
 }
 
-int SrsProtocol::on_send_message(SrsMessage* msg)
+int SrsProtocol::on_send_message(SrsOutputableMessage* msg)
 {
 	int ret = ERROR_SUCCESS;
 	
-	srs_assert(msg != NULL);
+	SrsMessage* common_msg = dynamic_cast<SrsMessage*>(msg);
+	if (!msg) {
+		srs_verbose("ignore the shared ptr message.");
+		return ret;
+	}
 	
-	switch (msg->header.message_type) {
+	srs_assert(common_msg != NULL);
+	
+	switch (common_msg->header.message_type) {
 		case RTMP_MSG_SetChunkSize: {
-			SrsSetChunkSizePacket* pkt = dynamic_cast<SrsSetChunkSizePacket*>(msg->get_packet());
+			SrsSetChunkSizePacket* pkt = dynamic_cast<SrsSetChunkSizePacket*>(common_msg->get_packet());
 			srs_assert(pkt != NULL);
 			
 			out_chunk_size = pkt->chunk_size;
@@ -917,17 +927,30 @@ SrsChunkStream::~SrsChunkStream()
 	srs_freep(msg);
 }
 
-SrsMessage::SrsMessage()
+SrsOutputableMessage::SrsOutputableMessage()
 {
+	payload = NULL;
 	size = 0;
+}
+
+SrsOutputableMessage::~SrsOutputableMessage()
+{	
+	free_payload();
+}
+
+void SrsOutputableMessage::free_payload()
+{
+	srs_freepa(payload);
+}
+
+SrsMessage::SrsMessage()
+{
 	stream = NULL;
-	payload = NULL;
 	packet = NULL;
 }
 
 SrsMessage::~SrsMessage()
 {	
-	srs_freep(payload);
 	srs_freep(packet);
 	srs_freep(stream);
 }
@@ -1089,14 +1112,97 @@ int SrsMessage::encode_packet()
 	return packet->encode(size, (char*&)payload);
 }
 
+SrsSharedMessage::SrsSharedPtr::SrsSharedPtr()
+{
+	payload = NULL;
+	size = 0;
+	perfer_cid = 0;
+	shared_count = 0;
+}
+
+SrsSharedMessage::SrsSharedPtr::~SrsSharedPtr()
+{
+	srs_freepa(payload);
+}
+
 SrsSharedMessage::SrsSharedMessage()
 {
+	ptr = NULL;
 }
 
 SrsSharedMessage::~SrsSharedMessage()
 {
 }
 
+void SrsSharedMessage::free_payload()
+{
+	if (ptr) {
+		if (ptr->shared_count == 0) {
+			srs_freep(ptr);
+		} else {
+			ptr->shared_count--;
+		}
+	}
+}
+
+int SrsSharedMessage::initialize(SrsMessageHeader* header, char* payload, int size, int perfer_cid)
+{
+	int ret = ERROR_SUCCESS;
+	
+	super::header = *header;
+	
+	if (ptr) {
+		ret = ERROR_SYSTEM_ASSERT_FAILED;
+		srs_error("should not set the payload twice. ret=%d", ret);
+		srs_assert(false);
+		
+		return ret;
+	}
+	
+	ptr = new SrsSharedPtr();
+	ptr->payload = payload;
+	ptr->size = size;
+	ptr->perfer_cid = perfer_cid;
+	
+	super::payload = (int8_t*)ptr->payload;
+	super::size = ptr->size;
+	
+	return ret;
+}
+
+SrsSharedMessage* SrsSharedMessage::copy()
+{
+	if (!ptr) {
+		srs_error("invoke initialize to initialize the ptr.");
+		srs_assert(false);
+		return NULL;
+	}
+	
+	SrsSharedMessage* copy = new SrsSharedMessage();
+	copy->ptr = ptr;
+	ptr->shared_count++;
+	
+	copy->payload = (int8_t*)ptr->payload;
+	copy->size = ptr->size;
+	
+	return copy;
+}
+
+int SrsSharedMessage::get_perfer_cid()
+{
+	if (!ptr) {
+		return 0;
+	}
+	
+	return ptr->perfer_cid;
+}
+
+int SrsSharedMessage::encode_packet()
+{
+	srs_verbose("shared message ignore the encode method.");
+	return ERROR_SUCCESS;
+}
+
 SrsPacket::SrsPacket()
 {
 }

@@ -47,6 +47,7 @@ class SrsChunkStream;
 class SrsAmf0Object;
 class SrsAmf0Null;
 class SrsAmf0Undefined;
+class SrsOutputableMessage;
 
 // convert class name to string.
 #define CLASS_NAME_STRING(className) #className
@@ -111,7 +112,7 @@ public:
 	* then sendout over socket.
 	* @msg this method will free it whatever return value.
 	*/
-	virtual int send_message(SrsMessage* msg);
+	virtual int send_message(SrsOutputableMessage* msg);
 private:
 	/**
 	* when recv message, update the context.
@@ -120,7 +121,7 @@ private:
 	/**
 	* when message sentout, update the context.
 	*/
-	virtual int on_send_message(SrsMessage* msg);
+	virtual int on_send_message(SrsOutputableMessage* msg);
 	/**
 	* try to recv interlaced message from peer,
 	* return error if error occur and nerver set the pmsg,
@@ -232,9 +233,9 @@ public:
 };
 
 /**
-* common RTMP message defines in rtmp.part2.Message-Formats.pdf.
+* message to output.
 */
-class SrsMessage
+class SrsOutputableMessage
 {
 // 4.1. Message Header
 public:
@@ -249,6 +250,34 @@ public:
 	*/
 	int32_t size;
 	int8_t* payload;
+public:
+	SrsOutputableMessage();
+	virtual ~SrsOutputableMessage();
+protected:
+	virtual void free_payload();
+/**
+* encode functions.
+*/
+public:
+	/**
+	* get the perfered cid(chunk stream id) which sendout over.
+	*/
+	virtual int get_perfer_cid() = 0;
+	/**
+	* encode the packet to message payload bytes.
+	* @remark there exists empty packet, so maybe the payload is NULL.
+	*/
+	virtual int encode_packet() = 0;
+};
+
+/**
+* common RTMP message defines in rtmp.part2.Message-Formats.pdf.
+* cannbe parse and decode.
+*/
+class SrsMessage : public SrsOutputableMessage
+{
+private:
+	typedef SrsOutputableMessage super;
 // decoded message payload.
 private:
 	SrsStream* stream;
@@ -256,6 +285,9 @@ private:
 public:
 	SrsMessage();
 	virtual ~SrsMessage();
+/**
+* decode functions.
+*/
 public:
 	/**
 	* decode packet from message payload.
@@ -266,6 +298,9 @@ public:
 	* @remark, user never free the pkt, the message will auto free it.
 	*/
 	virtual SrsPacket* get_packet();
+/**
+* encode functions.
+*/
 public:
 	/**
 	* get the perfered cid(chunk stream id) which sendout over.
@@ -287,12 +322,46 @@ public:
 /**
 * shared ptr message.
 * for audio/video/data message that need less memory copy.
+* and only for output.
 */
-class SrsSharedMessage : public SrsMessage
+class SrsSharedMessage : public SrsOutputableMessage
 {
+private:
+	typedef SrsOutputableMessage super;
+private:
+	struct SrsSharedPtr
+	{
+		char* payload;
+		int size;
+		int perfer_cid;
+		int shared_count;
+		
+		SrsSharedPtr();
+		virtual ~SrsSharedPtr();
+	};
+	SrsSharedPtr* ptr;
 public:
 	SrsSharedMessage();
 	virtual ~SrsSharedMessage();
+protected:
+	virtual void free_payload();
+public:
+	/**
+	* set the shared payload.
+	*/
+	virtual int initialize(SrsMessageHeader* header, char* payload, int size, int perfer_cid);
+	virtual SrsSharedMessage* copy();
+public:
+	/**
+	* get the perfered cid(chunk stream id) which sendout over.
+	*/
+	virtual int get_perfer_cid();
+	/**
+	* ignored.
+	* for shared message, nothing should be done.
+	* use initialize() to set the data.
+	*/
+	virtual int encode_packet();
 };
 
 /**