Revert "* #6295: removed unused clone method"

This reverts commit d04bf094.

sflphone-common/src/Codec.h

@@ -32,6 +32,8 @@
 
 #include "MimeParameters.h" // TODO Move to some higher directory
 
+#include <tr1/memory>
+
 #include <cc++/digest.h>
 
 /**
@@ -59,6 +61,11 @@ class Codec : public virtual MimeParameters
          */
         virtual std::string getDescription() const = 0;
 
+        /**
+         * @return A copy of the current codec.
+         */
+        virtual Codec* clone() const = 0;
+
         /**
          * Build a unique hash code for identifying the codec uniquely.
          * Note that if multiple implementations of codec are provided,

sflphone-common/src/audio/codecs/alaw.cpp

@@ -135,6 +135,15 @@ class Alaw : public sfl::AudioCodec
         std::string getDescription() const {
             return "audio/PCMA 8000 (\"alaw\") codec.";
         }
+
+        /**
+         * @Override
+         */
+        Alaw* clone() const {
+            return new Alaw (*this);
+        }
+
+
 };
 
 // the class factories

sflphone-common/src/audio/codecs/audiocodec.h

@@ -133,6 +133,11 @@ class AudioCodec : public Codec
          */
         unsigned int getFrameSize() const;
 
+        /**
+         * @Override
+         */
+        virtual AudioCodec* clone() const = 0;
+
     protected:
         /** Holds SDP-compliant codec name */
         std::string _codecName; // what we put inside sdp

sflphone-common/src/audio/codecs/celtcodec.cpp

@@ -156,6 +156,14 @@ class Celt : public sfl::AudioCodec
             return "audio/celt 32000 (\"HD\") codec. Based on libcelt, by Jean-Marc Valin.";
         }
 
+        /**
+         * @Override
+         */
+        Celt* clone() const {
+            return new Celt (*this);
+        }
+
+
     private:
 
         CELTMode *_mode;

sflphone-common/src/audio/codecs/g722.cpp

@@ -829,6 +829,14 @@ class G722 : public sfl::AudioCodec
             return "G722 codec. Most of the code comes from Steve Underwood (<steveu@coppice.org>) for the Asterisk project.";
         }
 
+        /**
+         * @Override
+         */
+        G722* clone() const {
+            return new G722 (*this);
+        }
+
+
     private:
 
         g722_decode_state_t *decode_s;

sflphone-common/src/audio/codecs/gsmcodec.cpp

@@ -93,6 +93,14 @@ class Gsm : public sfl::AudioCodec
             return "GSM codec. Based on libgsm, (C) Jutta Degener and Carsten Bormann, Technische Universitaet Berlin.";
         }
 
+        /**
+         * @Override
+         */
+        Gsm* clone() const {
+            return new Gsm (*this);
+        }
+
+
     private:
         gsm _decode_gsmhandle;
         gsm _encode_gsmhandle;

sflphone-common/src/audio/codecs/speexcodec_nb.cpp

@@ -121,6 +121,14 @@ class Speex : public sfl::AudioCodec
             return "audio/speex 8000 (\"narrow band\") codec. Based on libspeex, by Jean-Marc Valin.";
         }
 
+        /**
+         * @Override
+         */
+        Speex* clone() const {
+            return new Speex (*this);
+        }
+
+
     private:
         const SpeexMode* _speexModePtr;
         SpeexBits  _speex_dec_bits;

sflphone-common/src/audio/codecs/speexcodec_ub.cpp

@@ -123,6 +123,14 @@ class Speex : public sfl::AudioCodec
             return "audio/speex 32000 (\"ultra wide band\") codec. Based on libspeex, by Jean-Marc Valin.";
         }
 
+        /**
+         * @Override
+         */
+        Speex* clone() const {
+            return new Speex (*this);
+        }
+
+
     private:
         const SpeexMode* _speexModePtr;
         SpeexBits  _speex_dec_bits;

sflphone-common/src/audio/codecs/speexcodec_wb.cpp

@@ -122,6 +122,13 @@ class Speex : public sfl::AudioCodec
             return "audio/speex 16000 (\"wide band\") codec. Based on libspeex, by Jean-Marc Valin.";
         }
 
+        /**
+         * @Override
+         */
+        Speex* clone() const {
+            return new Speex (*this);
+        }
+
     private:
         const SpeexMode* _speexModePtr;
         SpeexBits  _speex_dec_bits;

sflphone-common/src/audio/codecs/ulaw.cpp

@@ -130,6 +130,14 @@ class Ulaw : public sfl::AudioCodec
         std::string getDescription() const {
             return "audio/PCMU 8000 (\"ulaw\") codec.";
         }
+
+        /**
+         * @Override
+         */
+        Ulaw* clone() const {
+            return new Ulaw (*this);
+        }
+
 };
 
 // the class factories