pan.h

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// SPDX-FileCopyrightText: © 2018-2020 Alexandros Theodotou <alex@zrythm.org>
// SPDX-License-Identifier: LicenseRef-ZrythmLicense
 
#ifndef __AUDIO_PAN_H__
#define __AUDIO_PAN_H__
 
#include <glib/gi18n.h>
 
#define PAN_MINUS_3DB_AMP (-0.292054216f)
 
#define PAN_MINUS_6DB_AMP (-0.498812766f)
 
typedef enum PanLaw
{
  PAN_LAW_0DB,
  PAN_LAW_MINUS_3DB,
  PAN_LAW_MINUS_6DB
} PanLaw;
 
static const char * pan_law_str[] = {
  /* TRANSLATORS: decibels */
  N_ ("0dB"),
  N_ ("-3dB"),
  N_ ("-6dB"),
};
 
static inline const char *
pan_law_to_string (PanLaw pan_law)
{
  return pan_law_str[pan_law];
}
 
typedef enum PanAlgorithm
{
  PAN_ALGORITHM_LINEAR,
  PAN_ALGORITHM_SQUARE_ROOT,
  PAN_ALGORITHM_SINE_LAW
} PanAlgorithm;
 
static const char * pan_algorithm_str[] = {
  N_ ("Linear"),
  N_ ("Square Root"),
  N_ ("Sine"),
};
 
static inline const char *
pan_algorithm_to_string (PanAlgorithm pan_algo)
{
  return pan_algorithm_str[pan_algo];
}
 
void
pan_get_calc_lr (
  PanLaw       law,
  PanAlgorithm algo,
  float        pan,
  float *      calc_l,
  float *      calc_r);
 
#endif