/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */

/*
    Rubber Band
    An audio time-stretching and pitch-shifting library.
    Copyright 2007-2008 Chris Cannam.
    
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License as
    published by the Free Software Foundation; either version 2 of the
    License, or (at your option) any later version.  See the file
    COPYING included with this distribution for more information.
*/

#ifndef _RUBBERBAND_C_API_H_
#define _RUBBERBAND_C_API_H_

#ifdef __cplusplus
extern "C" {
#endif

#define RUBBERBAND_VERSION "1.2.0-gpl"    
#define RUBBERBAND_API_MAJOR_VERSION 2
#define RUBBERBAND_API_MINOR_VERSION 0

/**
 * This is a C-linkage interface to the Rubber Band time stretcher.
 * 
 * This is a wrapper interface: the primary interface is in C++ and is
 * defined and documented in RubberBandStretcher.h.  The library
 * itself is implemented in C++, and requires C++ standard library
 * support even when using the C-linkage API.
 *
 * Please see RubberBandStretcher.h for documentation.
 *
 * If you are writing to the C++ API, do not include this header.
 */

enum RubberBandOption {

    RubberBandOptionProcessOffline       = 0x00000000,
    RubberBandOptionProcessRealTime      = 0x00000001,

    RubberBandOptionStretchElastic       = 0x00000000,
    RubberBandOptionStretchPrecise       = 0x00000010,
    
    RubberBandOptionTransientsCrisp      = 0x00000000,
    RubberBandOptionTransientsMixed      = 0x00000100,
    RubberBandOptionTransientsSmooth     = 0x00000200,

    RubberBandOptionPhaseLaminar         = 0x00000000,
    RubberBandOptionPhaseIndependent     = 0x00002000,
    
    RubberBandOptionThreadingAuto        = 0x00000000,
    RubberBandOptionThreadingNever       = 0x00010000,
    RubberBandOptionThreadingAlways      = 0x00020000,

    RubberBandOptionWindowStandard       = 0x00000000,
    RubberBandOptionWindowShort          = 0x00100000,
    RubberBandOptionWindowLong           = 0x00200000,

    RubberBandOptionFormantShifted       = 0x00000000,
    RubberBandOptionFormantPreserved     = 0x01000000,

    RubberBandOptionPitchHighQuality     = 0x00000000,
    RubberBandOptionPitchHighSpeed       = 0x02000000,
    RubberBandOptionPitchHighConsistency = 0x04000000
};

typedef int RubberBandOptions;

struct RubberBandState_;
typedef struct RubberBandState_ *RubberBandState;

extern RubberBandState rubberband_new(unsigned int sampleRate,
                                      unsigned int channels,
                                      RubberBandOptions options,
                                      double initialTimeRatio,
                                      double initialPitchScale);

extern void rubberband_delete(RubberBandState);

extern void rubberband_reset(RubberBandState);

extern void rubberband_set_time_ratio(RubberBandState, double ratio);
extern void rubberband_set_pitch_scale(RubberBandState, double scale);

extern double rubberband_get_time_ratio(const RubberBandState);
extern double rubberband_get_pitch_scale(const RubberBandState);

extern unsigned int rubberband_get_latency(const RubberBandState);

extern void rubberband_set_transients_option(RubberBandState, RubberBandOptions options);
extern void rubberband_set_phase_option(RubberBandState, RubberBandOptions options);
extern void rubberband_set_formant_option(RubberBandState, RubberBandOptions options);
extern void rubberband_set_pitch_option(RubberBandState, RubberBandOptions options);

extern void rubberband_set_expected_input_duration(RubberBandState, unsigned int samples);

extern unsigned int rubberband_get_samples_required(const RubberBandState);

extern void rubberband_set_max_process_size(RubberBandState, unsigned int samples);

extern void rubberband_study(RubberBandState, const float *const *input, unsigned int samples, int final);
extern void rubberband_process(RubberBandState, const float *const *input, unsigned int samples, int final);

extern int rubberband_available(const RubberBandState);
extern unsigned int rubberband_retrieve(const RubberBandState, float *const *output, unsigned int samples);

extern unsigned int rubberband_get_channel_count(const RubberBandState);

extern void rubberband_calculate_stretch(RubberBandState);

extern void rubberband_set_debug_level(RubberBandState, int level);
extern void rubberband_set_default_debug_level(int level);

#ifdef __cplusplus
}
#endif

#endif
