dash: Removing empty IAdaptionLogic implementation.

This is crash prone, and makes us maintain another implementation if we
ever edit the interface.
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>
(cherry picked from commit f2eccf2960d08612083dbfa22ceefe8004141cf6)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

modules/stream_filter/dash/DASHManager.cpp

@@ -47,6 +47,8 @@ DASHManager::DASHManager    ( HTTPConnectionManager *conManager, MPD *mpd,
     if ( this->mpdManager == NULL )
         return ;
     this->adaptationLogic   = AdaptationLogicFactory::create( this->logicType, this->mpdManager );
+    if ( this->adaptationLogic == NULL )
+        return ;
     this->conManager->attach(this->adaptationLogic);
 }
 DASHManager::~DASHManager   ()
@@ -102,3 +104,8 @@ const mpd::IMPDManager* DASHManager::getMpdManager() const
 {
     return this->mpdManager;
 }
+
+const logic::IAdaptationLogic*  DASHManager::getAdaptionLogic() const
+{
+    return this->adaptationLogic;
+}

modules/stream_filter/dash/DASHManager.h

@@ -46,6 +46,7 @@ namespace dash
             int read( void *p_buffer, size_t len );
             int peek( const uint8_t **pp_peek, size_t i_peek );
             const mpd::IMPDManager*         getMpdManager() const;
+            const logic::IAdaptationLogic*  getAdaptionLogic() const;
 
         private:
             http::HTTPConnectionManager         *conManager;

modules/stream_filter/dash/Modules.am

@@ -7,7 +7,6 @@ SOURCES_stream_filter_dash = \
     adaptationlogic/AlwaysBestAdaptationLogic.h \
     adaptationlogic/IAdaptationLogic.h \
     adaptationlogic/IDownloadRateObserver.h \
-    adaptationlogic/NullAdaptationLogic.h \
     adaptationlogic/RateBasedAdaptationLogic.h \
     adaptationlogic/RateBasedAdaptationLogic.cpp \
     exceptions/EOFException.h \

modules/stream_filter/dash/adaptationlogic/AdaptationLogicFactory.cpp

@@ -36,11 +36,11 @@ IAdaptationLogic* AdaptationLogicFactory::create ( IAdaptationLogic::LogicType l
 {
     switch(logic)
     {
-        case IAdaptationLogic::Default:         return new NullAdaptationLogic          (mpdManager);
         case IAdaptationLogic::AlwaysBest:      return new AlwaysBestAdaptationLogic    (mpdManager);
-        case IAdaptationLogic::AlwaysLowest:    return new NullAdaptationLogic          (mpdManager);
         case IAdaptationLogic::RateBased:       return new RateBasedAdaptationLogic     (mpdManager);
-
-        default:                                return new NullAdaptationLogic          (mpdManager);
+        case IAdaptationLogic::Default:
+        case IAdaptationLogic::AlwaysLowest:
+        default:
+            return NULL;
     }
 }

modules/stream_filter/dash/adaptationlogic/AdaptationLogicFactory.h

@@ -29,7 +29,6 @@
 #include "xml/Node.h"
 #include "mpd/IMPDManager.h"
 #include "adaptationlogic/AlwaysBestAdaptationLogic.h"
-#include "adaptationlogic/NullAdaptationLogic.h"
 #include "adaptationlogic/RateBasedAdaptationLogic.h"
 
 namespace dash

modules/stream_filter/dash/adaptationlogic/NullAdaptationLogic.h

-/*
- * NullAdaptationLogic.h
- *****************************************************************************
- * Copyright (C) 2010 - 2011 Klagenfurt University
- *
- * Created on: Aug 10, 2010
- * Authors: Christopher Mueller <christopher.mueller@itec.uni-klu.ac.at>
- *          Christian Timmerer  <christian.timmerer@itec.uni-klu.ac.at>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
- *****************************************************************************/
-
-#ifndef NULLADAPTATIONLOGIC_H_
-#define NULLADAPTATIONLOGIC_H_
-
-#include "adaptationlogic/AbstractAdaptationLogic.h"
-#include "http/Chunk.h"
-#include "xml/Node.h"
-#include "mpd/IMPDManager.h"
-#include "exceptions/EOFException.h"
-
-namespace dash
-{
-    namespace logic
-    {
-        class NullAdaptationLogic : public AbstractAdaptationLogic
-        {
-            public:
-                NullAdaptationLogic         (dash::mpd::IMPDManager *mpdManager) : AbstractAdaptationLogic(mpdManager)  {}
-                virtual ~NullAdaptationLogic()                                                                          {}
-
-                dash::http::Chunk* getNextChunk() throw(dash::exception::EOFException) { throw dash::exception::EOFException(); }
-        };
-    }
-}
-
-#endif /* NULLADAPTATIONLOGIC_H_ */

modules/stream_filter/dash/dash.cpp

@@ -110,7 +110,8 @@ static int Open(vlc_object_t *p_obj)
                                    dash::logic::IAdaptationLogic::RateBased );
 
     if ( p_dashManager->getMpdManager() == NULL ||
-         p_dashManager->getMpdManager()->getMPD() == NULL )
+         p_dashManager->getMpdManager()->getMPD() == NULL ||
+         p_dashManager->getAdaptionLogic() == NULL )
     {
         delete p_conManager;
         delete p_dashManager;