Stable multi-user buffer and re-enabled push support. Renamed DDV_->Mist. Closes #25

Buffer/stream.h

@@ -0,0 +1,69 @@
+#pragma once
+#include <string>
+#include "../util/tinythread.h"
+#include "../util/json.h"
+#include "user.h"
+
+namespace Buffer{
+  class Stream{
+    public:
+      /// Get a reference to this Stream object.
+      static Stream * get();
+      /// Get the current statistics in JSON format.
+      std::string getStats();
+      /// Get a new DTSC::Ring object for a user.
+      DTSC::Ring * getRing();
+      /// Drop a DTSC::Ring object.
+      void dropRing(DTSC::Ring * ring);
+      /// Get the (constant) header data of this stream.
+      std::string & getHeader();
+      /// Set the IP address to accept push data from.
+      void setWaitingIP(std::string ip);
+      /// Check if this is the IP address to accept push data from.
+      bool checkWaitingIP(std::string ip);
+      /// Sets the current socket for push data.
+      bool setInput(Socket::Connection S);
+      /// Gets the current socket for push data.
+      Socket::Connection & getIPInput();
+      /// Stores intermediate statistics.
+      void saveStats(std::string username, Stats & stats);
+      /// Stores final statistics.
+      void clearStats(std::string username, Stats & stats, std::string reason);
+      /// Cleans up broken connections
+      void cleanUsers();
+      /// Blocks until writing is safe.
+      void getWriteLock();
+      /// Drops a previously gotten write lock.
+      void dropWriteLock();
+      /// Blocks until reading is safe.
+      void getReadLock();
+      /// Drops a previously gotten read lock.
+      void dropReadLock();
+      /// Retrieves a reference to the DTSC::Stream
+      DTSC::Stream * getStream();
+      /// Sets the buffer name.
+      void setName(std::string n);
+      /// Add a user to the userlist.
+      void addUser(user * new_user);
+      /// Blocks the thread until new data is available.
+      void waitForData();
+      /// Cleanup function
+      ~Stream();
+  private:
+      volatile int readers;///< Current count of active readers;
+      volatile int writers;///< Current count of waiting/active writers.
+      tthread::mutex rw_mutex; ///< Mutex for read/write locking.
+      tthread::condition_variable rw_change; ///< Triggered when reader/writer count changes.
+      static Stream * ref;
+      Stream();
+      JSON::Value Storage; ///< Global storage of data.
+      DTSC::Stream * Strm;
+      std::string waiting_ip; ///< IP address for media push.
+      Socket::Connection ip_input; ///< Connection used for media push.
+      tthread::mutex stats_mutex; ///< Mutex for stats/users modifications.
+      std::vector<user*> users; ///< All connected users.
+      std::vector<user*>::iterator usersIt; ///< Iterator for all connected users.
+      std::string name; ///< Name for this buffer.
+      tthread::condition_variable moreData; ///< Triggered when more data becomes available.
+  };
+};