smnoisedecoder.hh

// Licensed GNU LGPL v2.1 or later: http://www.gnu.org/licenses/lgpl-2.1.html
 
#ifndef SPECTMORPH_NOISE_DECODER_HH
#define SPECTMORPH_NOISE_DECODER_HH
 
#include "smrandom.hh"
#include "smnoisebandpartition.hh"
#include "smrtmemory.hh"
 
namespace SpectMorph
{
 
class NoiseDecoder
{
  double mix_freq;
  size_t block_size;
 
  float *cos_window;
  float *interpolated_spectrum;
 
  Random random_gen;
  NoiseBandPartition noise_band_partition;
 
  void apply_window (float *spectrum, float *fft_buffer);
  static float *make_k_array();
 
public:
  NoiseDecoder (double mix_freq,
                size_t block_size);
  ~NoiseDecoder();
 
  enum OutputMode { REPLACE, ADD, FFT_SPECTRUM, DEBUG_UNWINDOWED, DEBUG_NO_OUTPUT };
 
  void set_seed (int seed);
  void process (const RTAudioBlock& audio_block,
                float *samples,
                OutputMode output_mode = REPLACE,
                float portamento_stretch = 1.0);
  void precompute_tables();
 
  static size_t preferred_block_size (double mix_freq);
};
 
}
 
#endif