#ifndef cwDspTransforms_h
#define cwDspTransforms_h

namespace cw
{
  namespace dsp
  {
    //---------------------------------------------------------------------------------------------------------------------------------
    // compressor
    //
    namespace compressor
    {
      enum { kAtkCompId, kRlsCompId };

      typedef struct
      {
        real_t      srate;          // system sample rate
        unsigned    procSmpCnt;     // samples per exec cycle
        real_t      inGain;         // input gain
        real_t      threshDb;       // threshold in dB (max:100 min:0) 
        real_t      ratio_num;      // numerator of the ratio
        unsigned    atkSmp;         // time to reduce   the signal by 10.0 db
        unsigned    rlsSmp;         // time to increase the signal by 10.0 db
        real_t      outGain;        // makeup gain
        bool        bypassFl;       // bypass enable
        sample_t*   rmsWnd;         // rmsWnd[rmsWndAllocCnt]
        unsigned    rmsWndAllocCnt; // 
        unsigned    rmsWndCnt;      // current RMS window size (rmsWndCnt must be <= rmsWndAllocCnt)
        unsigned    rmsWndIdx;      // next RMS window input index
        unsigned    state;          // env. state
        real_t      rmsDb;          // current incoming signal RMS (max:100 min:0)
        real_t      gain;           // current compressor  gain
        real_t      timeConstDb;    // the atk/rls will incr/decr by 'timeConstDb' per atkMs/rlsMs.
        real_t      pkDb;           //
        real_t      accumDb;        //

      } obj_t;
      
      rc_t create( obj_t*& p, real_t srate, unsigned procSmpCnt, real_t inGain, real_t rmsWndMaxMs, real_t rmsWndMs, real_t threshDb, real_t ratio, real_t atkMs, real_t rlsMs, real_t outGain, bool bypassFl );
      rc_t destroy( obj_t*& pp );
      rc_t exec( obj_t* p, const sample_t* x, sample_t* y, unsigned n );
      
      void set_attack_ms(  obj_t* p, real_t ms );
      void set_release_ms( obj_t* p, real_t ms );
      void set_thresh_db(  obj_t* p, real_t thresh );
      void set_rms_wnd_ms( obj_t* p, real_t ms );
    }
    
  }
  
}

#endif