add oversampler

oversampling/WDL/lameencdec.h

@@ -0,0 +1,87 @@
+/*
+  WDL - lameencdec.h
+  Copyright (C) 2005 and later Cockos Incorporated
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+  
+
+  This file provides a simple interface for using lame_enc/libmp3lame MP3 encoding
+
+*/
+
+
+#ifndef _LAMEENCDEC_H_
+#define _LAMEENCDEC_H_
+
+#include "queue.h"
+#include "wdlstring.h"
+#include "assocarray.h"
+
+class LameEncoder
+{
+  public:
+
+    LameEncoder(int srate, int nch, int bitrate, int stereomode=1, int quality=2,
+      int vbrmethod=-1, int vbrquality=2, int vbrmax=320, int abr=128, int rpgain=0,
+      WDL_StringKeyedArray<char*> *metadata=NULL);
+    ~LameEncoder();
+
+    int Status() { return errorstat; } // 1=no dll, 2=error
+
+    void Encode(float *in, int in_spls, int spacing=1);
+
+    WDL_Queue outqueue;
+
+    void reinit() 
+    { 
+      spltmp[0].Advance(spltmp[0].Available());  
+      spltmp[0].Compact();
+      spltmp[1].Advance(spltmp[1].Available());  
+      spltmp[1].Compact();
+    }
+
+    static const char *GetInfo();
+    static const char *GetLibName();
+    static int CheckDLL(); // returns >0 if DLL present, 1 for lame, 2 for old bladeenc
+    static void InitDLL(const char *extrapath=NULL, bool forceRetry=false); // call with extrapath != NULL if you want to try loading from another path
+
+    void SetVBRFilename(const char *fn)
+    {
+      m_vbrfile.Set(fn);
+    }
+
+    int GetNumChannels() { return m_encoder_nch; }
+
+    int GetID3Len() const { return m_id3_len; }
+    int GetIXMLLen() const { return m_ixml_len; }
+    
+  private:
+
+    void SetMetadata(WDL_StringKeyedArray<char*> *metadata);
+    int m_id3_len, m_ixml_len;
+    WDL_HeapBuf m_apetag;
+
+    void *m_lamestate;
+    WDL_Queue spltmp[2];
+    WDL_HeapBuf outtmp;
+    WDL_String m_vbrfile;
+    int errorstat;
+    int in_size_samples;
+    int m_nch,m_encoder_nch;
+};
+
+#endif