Backported various little edits from Pro edition.

src/input/input.h

@@ -20,7 +20,11 @@ namespace Mist {
     public:
       Input(Util::Config * cfg);
       virtual int run();
+      virtual void onCrash(){}
+      virtual void argumentsParsed(){}
       virtual ~Input() {};
+
+      virtual bool needsLock(){return true;}
     protected:
       static void callbackWrapper(char * data, size_t len, unsigned int id);
       virtual bool setup() = 0;
@@ -29,6 +33,9 @@ namespace Mist {
       virtual void getNext(bool smart = true) {};
       virtual void seek(int seekTime){};
       virtual void finish();
+      virtual bool openStreamSource() { return false; };
+      virtual void closeStreamSource() {};
+      virtual void parseStreamHeader() {};
       void play(int until = 0);
       void playOnce();
       void quitPlay();
@@ -36,11 +43,11 @@ namespace Mist {
       virtual void removeUnused();
       virtual void trackSelect(std::string trackSpec){};
       virtual void userCallback(char * data, size_t len, unsigned int id);
-
-      void serve();
-      void convert();
+      virtual void convert();
+      virtual void serve();
       
-      void parseHeader();
+      
+      virtual void parseHeader();
       bool bufferFrame(unsigned int track, unsigned int keyNum);
 
       unsigned int packTime;///Media-timestamp of the last packet.