PCM.hpp

/**
 * projectM -- Milkdrop-esque visualisation SDK
 * Copyright (C)2003-2007 projectM Team
 *
 * This library 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 library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 * See 'LICENSE.txt' included within this release
 *
 */
/**
 * $Id$
 *
 * Encapsulation of raw sound buffer. Used in beat detection
 *
 * $Log$
 */

#ifndef _PCM_H
#define _PCM_H

#include "dlldefs.h"


// 1024 is more computationally intensive, but maybe better at detecting lower bass
#define FFT_LENGTH 1024


class 
#ifdef WIN32 
DLLEXPORT 
#endif 
PCM {
public:
    float **PCMd;
    int start;

    /** Use wave smoothing */
    float waveSmoothing;

    int *ip;
    double *w;
    int newsamples;

    int numsamples; //size of new PCM info
    float *pcmdataL;     //holder for most recent pcm data
    float *pcmdataR;     //holder for most recent pcm data

    /** PCM data */
    float vdataL[FFT_LENGTH];  //holders for FFT data (spectrum)
    float vdataR[FFT_LENGTH];

    static int maxsamples;
    PCM();
    ~PCM();
    void addPCMfloat(const float *PCMdata, int samples);
    void addPCMfloat_2ch(const float *PCMdata, int samples);
    void addPCM16(short [2][512]);
    void addPCM16Data(const short* pcm_data, short samples);
    void addPCM8( unsigned char [2][1024]);
	void addPCM8_512( const unsigned char [2][512]);
    void getPCM(float *data, int samples, int channel, int freq, float smoothing, int derive);
    void freePCM();
    int getPCMnew(float *PCMdata, int channel, int freq, float smoothing, int derive,int reset);

private:
    void _initPCM(int maxsamples);

  };

#endif /** !_PCM_H */