/*  _______         ____    __         ___    ___
 * \    _  \       \    /  \  /       \   \  /   /       '   '  '
 *  |  | \  \       |  |    ||         |   \/   |         .      .
 *  |  |  |  |      |  |    ||         ||\  /|  |
 *  |  |  |  |      |  |    ||         || \/ |  |         '  '  '
 *  |  |  |  |      |  |    ||         ||    |  |         .      .
 *  |  |_/  /        \  \__//          ||    |  |
 * /_______/ynamic    \____/niversal  /__\  /____\usic   /|  .  . ibliotheque
 *                                                      /  \
 *                                                     / .  \
 * dumb.h - The user header file for DUMB.            / / \  \
 *                                                   | <  /   \_
 * Include this file in any of your files in         |  \/ /\   /
 * which you wish to use the DUMB functions           \_  /  > /
 * and variables.                                       | \ / /
 *                                                      |  ' /
 * Allegro users, you will probably want aldumb.h.       \__/
 */

#ifndef DUMB_H
#define DUMB_H


#include <stdlib.h>
#include <stdio.h>

#if defined(_DEBUG) && defined(_MSC_VER)
#ifndef _CRTDBG_MAP_ALLOC
#define _CRTDBG_MAP_ALLOC
#endif
#include <crtdbg.h>
#endif

#ifdef __cplusplus
	extern "C" {
#endif


#define DUMB_MAJOR_VERSION    0
#define DUMB_MINOR_VERSION    9
#define DUMB_REVISION_VERSION 3

#define DUMB_VERSION (DUMB_MAJOR_VERSION*10000 + DUMB_MINOR_VERSION*100 + DUMB_REVISION_VERSION)

#define DUMB_VERSION_STR "0.9.3"

#define DUMB_NAME "DUMB v" DUMB_VERSION_STR

#define DUMB_YEAR  2005
#define DUMB_MONTH 8
#define DUMB_DAY   7

#define DUMB_YEAR_STR2  "05"
#define DUMB_YEAR_STR4  "2005"
#define DUMB_MONTH_STR1 "8"
#define DUMB_DAY_STR1   "7"

#if DUMB_MONTH < 10
#define DUMB_MONTH_STR2 "0" DUMB_MONTH_STR1
#else
#define DUMB_MONTH_STR2 DUMB_MONTH_STR1
#endif

#if DUMB_DAY < 10
#define DUMB_DAY_STR2 "0" DUMB_DAY_STR1
#else
#define DUMB_DAY_STR2 DUMB_DAY_STR1
#endif


/* WARNING: The month and day were inadvertently swapped in the v0.8 release.
 *          Please do not compare this constant against any date in 2002. In
 *          any case, DUMB_VERSION is probably more useful for this purpose.
 */
#define DUMB_DATE (DUMB_YEAR*10000 + DUMB_MONTH*100 + DUMB_DAY)

#define DUMB_DATE_STR DUMB_DAY_STR1 "." DUMB_MONTH_STR1 "." DUMB_YEAR_STR4


#undef MIN
#undef MAX
#undef MID

#define MIN(x,y)   (((x) < (y)) ? (x) : (y))
#define MAX(x,y)   (((x) > (y)) ? (x) : (y))
#define MID(x,y,z) MAX((x), MIN((y), (z)))

#undef ABS
#define ABS(x) (((x) >= 0) ? (x) : (-(x)))


#ifdef DEBUGMODE

#ifndef ASSERT
#include <assert.h>
#define ASSERT(n) assert(n)
#endif
#ifndef TRACE
// it would be nice if this did actually trace ...
#define TRACE 1 ? (void)0 : (void)printf
#endif

#else

#ifndef ASSERT
#define ASSERT(n)
#endif
#ifndef TRACE
#define TRACE 1 ? (void)0 : (void)printf
#endif

#endif


#define DUMB_ID(a,b,c,d) (((unsigned int)(a) << 24) | \
                          ((unsigned int)(b) << 16) | \
                          ((unsigned int)(c) <<  8) | \
                          ((unsigned int)(d)      ))


#ifdef __DOS__
typedef long int32;
typedef unsigned long uint32;
typedef signed long sint32;
#else
typedef int int32;
typedef unsigned int uint32;
typedef signed int sint32;
#endif

#define CDECL
#ifndef LONG_LONG
#if defined __GNUC__ || defined __INTEL_COMPILER || defined __MWERKS__
#define LONG_LONG long long
#elif defined _MSC_VER || defined __WATCOMC__
#define LONG_LONG __int64
#undef CDECL
#define CDECL __cdecl
#elif defined __sgi
#define LONG_LONG long long
#else
#error 64-bit integer type unknown
#endif
#endif

#if __GNUC__ * 100 + __GNUC_MINOR__ >= 301 /* GCC 3.1+ */
#ifndef DUMB_DECLARE_DEPRECATED
#define DUMB_DECLARE_DEPRECATED
#endif
#define DUMB_DEPRECATED __attribute__((__deprecated__))
#else
#define DUMB_DEPRECATED
#endif

#define DUMBEXPORT CDECL
#define DUMBCALLBACK CDECL

/* Basic Sample Type. Normal range is -0x800000 to 0x7FFFFF. */

typedef int sample_t;


/* Library Clean-up Management */

int dumb_atexit(void (*proc)(void));

void dumb_exit(void);


/* File Input Functions */

typedef struct DUMBFILE_SYSTEM
{
	void *(*open)(const char *filename);
	int (*skip)(void *f, int32 n);
	int (*getc)(void *f);
	int32 (*getnc)(char *ptr, int32 n, void *f);
	void (*close)(void *f);
}
DUMBFILE_SYSTEM;

typedef struct DUMBFILE DUMBFILE;

void DUMBEXPORT register_dumbfile_system(const DUMBFILE_SYSTEM *dfs);

DUMBFILE *DUMBEXPORT dumbfile_open(const char *filename);
DUMBFILE *DUMBEXPORT dumbfile_open_ex(void *file, const DUMBFILE_SYSTEM *dfs);

int32 DUMBEXPORT dumbfile_pos(DUMBFILE *f);
int DUMBEXPORT dumbfile_skip(DUMBFILE *f, int32 n);

int DUMBEXPORT dumbfile_getc(DUMBFILE *f);

int DUMBEXPORT dumbfile_igetw(DUMBFILE *f);
int DUMBEXPORT dumbfile_mgetw(DUMBFILE *f);

int32 DUMBEXPORT dumbfile_igetl(DUMBFILE *f);
int32 DUMBEXPORT dumbfile_mgetl(DUMBFILE *f);

uint32 DUMBEXPORT dumbfile_cgetul(DUMBFILE *f);
sint32 DUMBEXPORT dumbfile_cgetsl(DUMBFILE *f);

int32 DUMBEXPORT dumbfile_getnc(char *ptr, int32 n, DUMBFILE *f);

int DUMBEXPORT dumbfile_error(DUMBFILE *f);
int DUMBEXPORT dumbfile_close(DUMBFILE *f);


/* stdio File Input Module */

void DUMBEXPORT dumb_register_stdfiles(void);

DUMBFILE *DUMBEXPORT dumbfile_open_stdfile(FILE *p);


/* Memory File Input Module */

DUMBFILE *DUMBEXPORT dumbfile_open_memory(const char *data, int32 size);


/* DUH Management */

typedef struct DUH DUH;

#define DUH_SIGNATURE DUMB_ID('D','U','H','!')

void DUMBEXPORT unload_duh(DUH *duh);

DUH *DUMBEXPORT load_duh(const char *filename);
DUH *DUMBEXPORT read_duh(DUMBFILE *f);

int32 DUMBEXPORT duh_get_length(DUH *duh);

const char *DUMBEXPORT duh_get_tag(DUH *duh, const char *key);

/* Signal Rendering Functions */

typedef struct DUH_SIGRENDERER DUH_SIGRENDERER;

DUH_SIGRENDERER *DUMBEXPORT duh_start_sigrenderer(DUH *duh, int sig, int n_channels, int32 pos);

#ifdef DUMB_DECLARE_DEPRECATED
typedef void (*DUH_SIGRENDERER_CALLBACK)(void *data, sample_t **samples, int n_channels, int32 length);
/* This is deprecated, but is not marked as such because GCC tends to
 * complain spuriously when the typedef is used later. See comments below.
 */

void duh_sigrenderer_set_callback(
	DUH_SIGRENDERER *sigrenderer,
	DUH_SIGRENDERER_CALLBACK callback, void *data
) DUMB_DEPRECATED;
/* The 'callback' argument's type has changed for const-correctness. See the
 * DUH_SIGRENDERER_CALLBACK definition just above. Also note that the samples
 * in the buffer are now 256 times as large; the normal range is -0x800000 to
 * 0x7FFFFF. The function has been renamed partly because its functionality
 * has changed slightly and partly so that its name is more meaningful. The
 * new one is duh_sigrenderer_set_analyser_callback(), and the typedef for
 * the function pointer has also changed, from DUH_SIGRENDERER_CALLBACK to
 * DUH_SIGRENDERER_ANALYSER_CALLBACK. (If you wanted to use this callback to
 * apply a DSP effect, don't worry; there is a better way of doing this. It
 * is undocumented, so contact me and I shall try to help. Contact details
 * are in readme.txt.)
 */

typedef void (*DUH_SIGRENDERER_ANALYSER_CALLBACK)(void *data, const sample_t *const *samples, int n_channels, int32 length);
/* This is deprecated, but is not marked as such because GCC tends to
 * complain spuriously when the typedef is used later. See comments below.
 */

void duh_sigrenderer_set_analyser_callback(
	DUH_SIGRENDERER *sigrenderer,
	DUH_SIGRENDERER_ANALYSER_CALLBACK callback, void *data
) DUMB_DEPRECATED;
/* This is deprecated because the meaning of the 'samples' parameter in the
 * callback needed to change. For stereo applications, the array used to be
 * indexed with samples[channel][pos]. It is now indexed with
 * samples[0][pos*2+channel]. Mono sample data are still indexed with
 * samples[0][pos]. The array is still 2D because samples will probably only
 * ever be interleaved in twos. In order to fix your code, adapt it to the
 * new sample layout and then call
 * duh_sigrenderer_set_sample_analyser_callback below instead of this
 * function.
 */
#endif

typedef void (*DUH_SIGRENDERER_SAMPLE_ANALYSER_CALLBACK)(void *data, const sample_t *const *samples, int n_channels, int32 length);

void duh_sigrenderer_set_sample_analyser_callback(
	DUH_SIGRENDERER *sigrenderer,
	DUH_SIGRENDERER_SAMPLE_ANALYSER_CALLBACK callback, void *data
);

int DUMBEXPORT duh_sigrenderer_get_n_channels(DUH_SIGRENDERER *sigrenderer);
int32 DUMBEXPORT duh_sigrenderer_get_position(DUH_SIGRENDERER *sigrenderer);

void DUMBEXPORT duh_sigrenderer_set_sigparam(DUH_SIGRENDERER *sigrenderer, unsigned char id, int32 value);

#ifdef DUMB_DECLARE_DEPRECATED
int32 duh_sigrenderer_get_samples(
	DUH_SIGRENDERER *sigrenderer,
	float volume, float delta,
	int32 size, sample_t **samples
) DUMB_DEPRECATED;
/* The sample format has changed, so if you were using this function,
 * you should switch to duh_sigrenderer_generate_samples() and change
 * how you interpret the samples array. See the comments for
 * duh_sigrenderer_set_analyser_callback().
 */
#endif

int32 DUMBEXPORT duh_sigrenderer_generate_samples(
	DUH_SIGRENDERER *sigrenderer,
	double volume, double delta,
	int32 size, sample_t **samples
);

void DUMBEXPORT duh_sigrenderer_get_current_sample(DUH_SIGRENDERER *sigrenderer, float volume, sample_t *samples);

void DUMBEXPORT duh_end_sigrenderer(DUH_SIGRENDERER *sigrenderer);


/* DUH Rendering Functions */

int32 DUMBEXPORT duh_render(
	DUH_SIGRENDERER *sigrenderer,
	int bits, int unsign,
	float volume, float delta,
	int32 size, void *sptr
);

#ifdef DUMB_DECLARE_DEPRECATED

int32 duh_render_signal(
	DUH_SIGRENDERER *sigrenderer,
	float volume, float delta,
	int32 size, sample_t **samples
) DUMB_DEPRECATED;
/* Please use duh_sigrenderer_generate_samples(), and see the
 * comments for the deprecated duh_sigrenderer_get_samples() too.
 */

typedef DUH_SIGRENDERER DUH_RENDERER DUMB_DEPRECATED;
/* Please use DUH_SIGRENDERER instead of DUH_RENDERER. */

DUH_SIGRENDERER *duh_start_renderer(DUH *duh, int n_channels, int32 pos) DUMB_DEPRECATED;
/* Please use duh_start_sigrenderer() instead. Pass 0 for 'sig'. */

int duh_renderer_get_n_channels(DUH_SIGRENDERER *dr) DUMB_DEPRECATED;
int32 duh_renderer_get_position(DUH_SIGRENDERER *dr) DUMB_DEPRECATED;
/* Please use the duh_sigrenderer_*() equivalents of these two functions. */

void duh_end_renderer(DUH_SIGRENDERER *dr) DUMB_DEPRECATED;
/* Please use duh_end_sigrenderer() instead. */

DUH_SIGRENDERER *duh_renderer_encapsulate_sigrenderer(DUH_SIGRENDERER *sigrenderer) DUMB_DEPRECATED;
DUH_SIGRENDERER *duh_renderer_get_sigrenderer(DUH_SIGRENDERER *dr) DUMB_DEPRECATED;
DUH_SIGRENDERER *duh_renderer_decompose_to_sigrenderer(DUH_SIGRENDERER *dr) DUMB_DEPRECATED;
/* These functions have become no-ops that just return the parameter.
 * So, for instance, replace
 *   duh_renderer_encapsulate_sigrenderer(my_sigrenderer)
 * with
 *   my_sigrenderer
 */

#endif


/* Impulse Tracker Support */

extern int dumb_it_max_to_mix;

typedef struct DUMB_IT_SIGDATA DUMB_IT_SIGDATA;
typedef struct DUMB_IT_SIGRENDERER DUMB_IT_SIGRENDERER;

DUMB_IT_SIGDATA *DUMBEXPORT duh_get_it_sigdata(DUH *duh);
DUH_SIGRENDERER *DUMBEXPORT duh_encapsulate_it_sigrenderer(DUMB_IT_SIGRENDERER *it_sigrenderer, int n_channels, int32 pos);
DUMB_IT_SIGRENDERER *DUMBEXPORT duh_get_it_sigrenderer(DUH_SIGRENDERER *sigrenderer);

int DUMBEXPORT dumb_it_trim_silent_patterns(DUH * duh);

typedef int (*dumb_scan_callback)(void *, int, int32);
int DUMBEXPORT dumb_it_scan_for_playable_orders(DUMB_IT_SIGDATA *sigdata, dumb_scan_callback callback, void * callback_data);

DUH_SIGRENDERER *DUMBEXPORT dumb_it_start_at_order(DUH *duh, int n_channels, int startorder);

void DUMBEXPORT dumb_it_set_resampling_quality(DUMB_IT_SIGRENDERER * sigrenderer, int quality);

void DUMBEXPORT dumb_it_set_ramp_style(DUMB_IT_SIGRENDERER * sigrenderer, int ramp_style);

void DUMBEXPORT dumb_it_set_loop_callback(DUMB_IT_SIGRENDERER *sigrenderer, int (DUMBCALLBACK *callback)(void *data), void *data);
void DUMBEXPORT dumb_it_set_xm_speed_zero_callback(DUMB_IT_SIGRENDERER *sigrenderer, int (DUMBCALLBACK *callback)(void *data), void *data);
void DUMBEXPORT dumb_it_set_midi_callback(DUMB_IT_SIGRENDERER *sigrenderer, int (DUMBCALLBACK *callback)(void *data, int channel, unsigned char midi_byte), void *data);
void DUMBEXPORT dumb_it_set_global_volume_zero_callback(DUMB_IT_SIGRENDERER *sigrenderer, int (DUMBCALLBACK *callback)(void *data), void *data);

int DUMBCALLBACK dumb_it_callback_terminate(void *data);
int DUMBCALLBACK dumb_it_callback_midi_block(void *data, int channel, unsigned char midi_byte);

/* dumb_*_mod*: restrict |= 1-Don't read 15 sample files / 2-Use old pattern counting method */

DUH *DUMBEXPORT dumb_load_it(const char *filename);
DUH *DUMBEXPORT dumb_load_xm(const char *filename);
DUH *DUMBEXPORT dumb_load_s3m(const char *filename);
DUH *DUMBEXPORT dumb_load_stm(const char *filename);
DUH *DUMBEXPORT dumb_load_mod(const char *filename, int rstrict);
DUH *DUMBEXPORT dumb_load_ptm(const char *filename);
DUH *DUMBEXPORT dumb_load_669(const char *filename);
DUH *DUMBEXPORT dumb_load_psm(const char *filename, int subsong);
DUH *DUMBEXPORT dumb_load_old_psm(const char * filename);
DUH *DUMBEXPORT dumb_load_mtm(const char *filename);
DUH *DUMBEXPORT dumb_load_riff(const char *filename);
DUH *DUMBEXPORT dumb_load_asy(const char *filename);
DUH *DUMBEXPORT dumb_load_okt(const char *filename);

DUH *DUMBEXPORT dumb_read_it(DUMBFILE *f);
DUH *DUMBEXPORT dumb_read_xm(DUMBFILE *f);
DUH *DUMBEXPORT dumb_read_s3m(DUMBFILE *f);
DUH *DUMBEXPORT dumb_read_stm(DUMBFILE *f);
DUH *DUMBEXPORT dumb_read_mod(DUMBFILE *f, int rstrict);
DUH *DUMBEXPORT dumb_read_ptm(DUMBFILE *f);
DUH *DUMBEXPORT dumb_read_669(DUMBFILE *f);
DUH *DUMBEXPORT dumb_read_psm(DUMBFILE *f, int subsong);
DUH *DUMBEXPORT dumb_read_old_psm(DUMBFILE *f);
DUH *DUMBEXPORT dumb_read_mtm(DUMBFILE *f);
DUH *DUMBEXPORT dumb_read_riff(DUMBFILE *f);
DUH *DUMBEXPORT dumb_read_asy(DUMBFILE *f);
DUH *DUMBEXPORT dumb_read_okt(DUMBFILE *f);

DUH *DUMBEXPORT dumb_load_it_quick(const char *filename);
DUH *DUMBEXPORT dumb_load_xm_quick(const char *filename);
DUH *DUMBEXPORT dumb_load_s3m_quick(const char *filename);
DUH *DUMBEXPORT dumb_load_stm_quick(const char *filename);
DUH *DUMBEXPORT dumb_load_mod_quick(const char *filename, int rstrict);
DUH *DUMBEXPORT dumb_load_ptm_quick(const char *filename);
DUH *DUMBEXPORT dumb_load_669_quick(const char *filename);
DUH *DUMBEXPORT dumb_load_psm_quick(const char *filename, int subsong);
DUH *DUMBEXPORT dumb_load_old_psm_quick(const char * filename);
DUH *DUMBEXPORT dumb_load_mtm_quick(const char *filename);
DUH *DUMBEXPORT dumb_load_riff_quick(const char *filename);
DUH *DUMBEXPORT dumb_load_asy_quick(const char *filename);
DUH *DUMBEXPORT dumb_load_okt_quick(const char *filename);

DUH *DUMBEXPORT dumb_read_it_quick(DUMBFILE *f);
DUH *DUMBEXPORT dumb_read_xm_quick(DUMBFILE *f);
DUH *DUMBEXPORT dumb_read_s3m_quick(DUMBFILE *f);
DUH *DUMBEXPORT dumb_read_stm_quick(DUMBFILE *f);
DUH *DUMBEXPORT dumb_read_mod_quick(DUMBFILE *f, int rstrict);
DUH *DUMBEXPORT dumb_read_ptm_quick(DUMBFILE *f);
DUH *DUMBEXPORT dumb_read_669_quick(DUMBFILE *f);
DUH *DUMBEXPORT dumb_read_psm_quick(DUMBFILE *f, int subsong);
DUH *DUMBEXPORT dumb_read_old_psm_quick(DUMBFILE *f);
DUH *DUMBEXPORT dumb_read_mtm_quick(DUMBFILE *f);
DUH *DUMBEXPORT dumb_read_riff_quick(DUMBFILE *f);
DUH *DUMBEXPORT dumb_read_asy_quick(DUMBFILE *f);
DUH *DUMBEXPORT dumb_read_okt_quick(DUMBFILE *f);

int32 DUMBEXPORT dumb_it_build_checkpoints(DUMB_IT_SIGDATA *sigdata, int startorder);
void DUMBEXPORT dumb_it_do_initial_runthrough(DUH *duh);

int DUMBEXPORT dumb_get_psm_subsong_count(DUMBFILE *f);

const unsigned char *DUMBEXPORT dumb_it_sd_get_song_message(DUMB_IT_SIGDATA *sd);

int DUMBEXPORT dumb_it_sd_get_n_orders(DUMB_IT_SIGDATA *sd);
int DUMBEXPORT dumb_it_sd_get_n_samples(DUMB_IT_SIGDATA *sd);
int DUMBEXPORT dumb_it_sd_get_n_instruments(DUMB_IT_SIGDATA *sd);

const unsigned char *DUMBEXPORT dumb_it_sd_get_sample_name(DUMB_IT_SIGDATA *sd, int i);
const unsigned char *DUMBEXPORT dumb_it_sd_get_sample_filename(DUMB_IT_SIGDATA *sd, int i);
const unsigned char *DUMBEXPORT dumb_it_sd_get_instrument_name(DUMB_IT_SIGDATA *sd, int i);
const unsigned char *DUMBEXPORT dumb_it_sd_get_instrument_filename(DUMB_IT_SIGDATA *sd, int i);

int DUMBEXPORT dumb_it_sd_get_initial_global_volume(DUMB_IT_SIGDATA *sd);
void DUMBEXPORT dumb_it_sd_set_initial_global_volume(DUMB_IT_SIGDATA *sd, int gv);

int DUMBEXPORT dumb_it_sd_get_mixing_volume(DUMB_IT_SIGDATA *sd);
void DUMBEXPORT dumb_it_sd_set_mixing_volume(DUMB_IT_SIGDATA *sd, int mv);

int DUMBEXPORT dumb_it_sd_get_initial_speed(DUMB_IT_SIGDATA *sd);
void DUMBEXPORT dumb_it_sd_set_initial_speed(DUMB_IT_SIGDATA *sd, int speed);

int DUMBEXPORT dumb_it_sd_get_initial_tempo(DUMB_IT_SIGDATA *sd);
void DUMBEXPORT dumb_it_sd_set_initial_tempo(DUMB_IT_SIGDATA *sd, int tempo);

int DUMBEXPORT dumb_it_sd_get_initial_channel_volume(DUMB_IT_SIGDATA *sd, int channel);
void DUMBEXPORT dumb_it_sd_set_initial_channel_volume(DUMB_IT_SIGDATA *sd, int channel, int volume);

int DUMBEXPORT dumb_it_sr_get_current_order(DUMB_IT_SIGRENDERER *sr);
int DUMBEXPORT dumb_it_sr_get_current_row(DUMB_IT_SIGRENDERER *sr);

int DUMBEXPORT dumb_it_sr_get_global_volume(DUMB_IT_SIGRENDERER *sr);
void DUMBEXPORT dumb_it_sr_set_global_volume(DUMB_IT_SIGRENDERER *sr, int gv);

int DUMBEXPORT dumb_it_sr_get_tempo(DUMB_IT_SIGRENDERER *sr);
void DUMBEXPORT dumb_it_sr_set_tempo(DUMB_IT_SIGRENDERER *sr, int tempo);

int DUMBEXPORT dumb_it_sr_get_speed(DUMB_IT_SIGRENDERER *sr);
void DUMBEXPORT dumb_it_sr_set_speed(DUMB_IT_SIGRENDERER *sr, int speed);

#define DUMB_IT_N_CHANNELS 64
#define DUMB_IT_N_NNA_CHANNELS 192
#define DUMB_IT_TOTAL_CHANNELS (DUMB_IT_N_CHANNELS + DUMB_IT_N_NNA_CHANNELS)

/* Channels passed to any of these functions are 0-based */
int DUMBEXPORT dumb_it_sr_get_channel_volume(DUMB_IT_SIGRENDERER *sr, int channel);
void DUMBEXPORT dumb_it_sr_set_channel_volume(DUMB_IT_SIGRENDERER *sr, int channel, int volume);

int DUMBEXPORT dumb_it_sr_get_channel_muted(DUMB_IT_SIGRENDERER *sr, int channel);
void DUMBEXPORT dumb_it_sr_set_channel_muted(DUMB_IT_SIGRENDERER *sr, int channel, int muted);

typedef struct DUMB_IT_CHANNEL_STATE DUMB_IT_CHANNEL_STATE;

struct DUMB_IT_CHANNEL_STATE
{
	int channel; /* 0-based; meaningful for NNA channels */
	int sample; /* 1-based; 0 if nothing playing, then other fields undef */
	int freq; /* in Hz */
	float volume; /* 1.0 maximum; affected by ALL factors, inc. mixing vol */
	unsigned char pan; /* 0-64, 100 for surround */
	signed char subpan; /* use (pan + subpan/256.0f) or ((pan<<8)+subpan) */
	unsigned char filter_cutoff;    /* 0-127    cutoff=127 AND resonance=0 */
	unsigned char filter_subcutoff; /* 0-255      -> no filters (subcutoff */
	unsigned char filter_resonance; /* 0-127        always 0 in this case) */
	/* subcutoff only changes from zero if filter envelopes are in use. The
	 * calculation (filter_cutoff + filter_subcutoff/256.0f) gives a more
	 * accurate filter cutoff measurement as a float. It would often be more
	 * useful to use a scaled int such as ((cutoff<<8) + subcutoff).
	 */
};

/* Values of 64 or more will access NNA channels here. */
void DUMBEXPORT dumb_it_sr_get_channel_state(DUMB_IT_SIGRENDERER *sr, int channel, DUMB_IT_CHANNEL_STATE *state);


/* Signal Design Helper Values */

/* Use pow(DUMB_SEMITONE_BASE, n) to get the 'delta' value to transpose up by
 * n semitones. To transpose down, use negative n.
 */
#define DUMB_SEMITONE_BASE 1.059463094359295309843105314939748495817

/* Use pow(DUMB_QUARTERTONE_BASE, n) to get the 'delta' value to transpose up
 * by n quartertones. To transpose down, use negative n.
 */
#define DUMB_QUARTERTONE_BASE 1.029302236643492074463779317738953977823

/* Use pow(DUMB_PITCH_BASE, n) to get the 'delta' value to transpose up by n
 * units. In this case, 256 units represent one semitone; 3072 units
 * represent one octave. These units are used by the sequence signal (SEQU).
 */
#define DUMB_PITCH_BASE 1.000225659305069791926712241547647863626


/* Signal Design Function Types */

typedef void sigdata_t;
typedef void sigrenderer_t;

typedef sigdata_t *(*DUH_LOAD_SIGDATA)(DUH *duh, DUMBFILE *file);

typedef sigrenderer_t *(*DUH_START_SIGRENDERER)(
	DUH *duh,
	sigdata_t *sigdata,
	int n_channels,
	int32 pos
);

typedef void (*DUH_SIGRENDERER_SET_SIGPARAM)(
	sigrenderer_t *sigrenderer,
	unsigned char id, int32 value
);

typedef int32 (*DUH_SIGRENDERER_GENERATE_SAMPLES)(
	sigrenderer_t *sigrenderer,
	double volume, double delta,
	int32 size, sample_t **samples
);

typedef void (*DUH_SIGRENDERER_GET_CURRENT_SAMPLE)(
	sigrenderer_t *sigrenderer,
	double volume,
	sample_t *samples
);

typedef void (*DUH_END_SIGRENDERER)(sigrenderer_t *sigrenderer);

typedef void (*DUH_UNLOAD_SIGDATA)(sigdata_t *sigdata);


/* Signal Design Function Registration */

typedef struct DUH_SIGTYPE_DESC
{
	int32 type;
	DUH_LOAD_SIGDATA                   load_sigdata;
	DUH_START_SIGRENDERER              start_sigrenderer;
	DUH_SIGRENDERER_SET_SIGPARAM       sigrenderer_set_sigparam;
	DUH_SIGRENDERER_GENERATE_SAMPLES   sigrenderer_generate_samples;
	DUH_SIGRENDERER_GET_CURRENT_SAMPLE sigrenderer_get_current_sample;
	DUH_END_SIGRENDERER                end_sigrenderer;
	DUH_UNLOAD_SIGDATA                 unload_sigdata;
}
DUH_SIGTYPE_DESC;

void DUMBEXPORT dumb_register_sigtype(DUH_SIGTYPE_DESC *desc);


// Decide where to put these functions; new heading?

sigdata_t *DUMBEXPORT duh_get_raw_sigdata(DUH *duh, int sig, int32 type);

DUH_SIGRENDERER *DUMBEXPORT duh_encapsulate_raw_sigrenderer(sigrenderer_t *vsigrenderer, DUH_SIGTYPE_DESC *desc, int n_channels, int32 pos);
sigrenderer_t *DUMBEXPORT duh_get_raw_sigrenderer(DUH_SIGRENDERER *sigrenderer, int32 type);

int DUMBEXPORT duh_add_signal(DUH *duh, DUH_SIGTYPE_DESC *desc, sigdata_t *sigdata);


/* Standard Signal Types */

//void dumb_register_sigtype_sample(void);


/* Sample Buffer Allocation Helpers */

#ifdef DUMB_DECLARE_DEPRECATED
sample_t **create_sample_buffer(int n_channels, int32 length) DUMB_DEPRECATED;
/* DUMB has been changed to interleave stereo samples. Use
 * allocate_sample_buffer() instead, and see the comments for
 * duh_sigrenderer_set_analyser_callback().
 */
#endif
sample_t **DUMBEXPORT allocate_sample_buffer(int n_channels, int32 length);
void DUMBEXPORT destroy_sample_buffer(sample_t **samples);


/* Silencing Helper */

void DUMBEXPORT dumb_silence(sample_t *samples, int32 length);


/* Click Removal Helpers */

typedef struct DUMB_CLICK_REMOVER DUMB_CLICK_REMOVER;

DUMB_CLICK_REMOVER *DUMBEXPORT dumb_create_click_remover(void);
void DUMBEXPORT dumb_record_click(DUMB_CLICK_REMOVER *cr, int32 pos, sample_t step);
void DUMBEXPORT dumb_remove_clicks(DUMB_CLICK_REMOVER *cr, sample_t *samples, int32 length, int step, double halflife);
sample_t DUMBEXPORT dumb_click_remover_get_offset(DUMB_CLICK_REMOVER *cr);
void DUMBEXPORT dumb_destroy_click_remover(DUMB_CLICK_REMOVER *cr);

DUMB_CLICK_REMOVER **DUMBEXPORT dumb_create_click_remover_array(int n);
void DUMBEXPORT dumb_record_click_array(int n, DUMB_CLICK_REMOVER **cr, int32 pos, sample_t *step);
void DUMBEXPORT dumb_record_click_negative_array(int n, DUMB_CLICK_REMOVER **cr, int32 pos, sample_t *step);
void DUMBEXPORT dumb_remove_clicks_array(int n, DUMB_CLICK_REMOVER **cr, sample_t **samples, int32 length, double halflife);
void DUMBEXPORT dumb_click_remover_get_offset_array(int n, DUMB_CLICK_REMOVER **cr, sample_t *offset);
void DUMBEXPORT dumb_destroy_click_remover_array(int n, DUMB_CLICK_REMOVER **cr);


/* Resampling Helpers */

#define DUMB_RQ_ALIASING 0
#define DUMB_RQ_LINEAR   1
#define DUMB_RQ_CUBIC    2
#define DUMB_RQ_N_LEVELS 3
extern int dumb_resampling_quality;

typedef struct DUMB_RESAMPLER DUMB_RESAMPLER;

typedef struct DUMB_VOLUME_RAMP_INFO DUMB_VOLUME_RAMP_INFO;

typedef void (*DUMB_RESAMPLE_PICKUP)(DUMB_RESAMPLER *resampler, void *data);

#include "internal/blip_buf.h"

struct DUMB_RESAMPLER
{
	void *src;
	int32 pos;
	int subpos;
	int32 start, end;
	int dir;
	DUMB_RESAMPLE_PICKUP pickup;
	void *pickup_data;
	int quality;
	/* Everything below this point is internal: do not use. */
	union {
		sample_t x24[3*2];
		short x16[3*2];
		signed char x8[3*2];
	} x;
	int overshot;
	int last_clock;
	int last_amp[2];
	blip_t* blip_buffer[2];
};

struct DUMB_VOLUME_RAMP_INFO
{
	float volume;
	float delta;
	float target;
	float mix;
};

void dumb_reset_resampler(DUMB_RESAMPLER *resampler, sample_t *src, int src_channels, int32 pos, int32 start, int32 end, int quality);
DUMB_RESAMPLER *dumb_start_resampler(sample_t *src, int src_channels, int32 pos, int32 start, int32 end, int quality);
//int32 dumb_resample_1_1(DUMB_RESAMPLER *resampler, sample_t *dst, int32 dst_size, DUMB_VOLUME_RAMP_INFO * volume, double delta);
int32 dumb_resample_1_2(DUMB_RESAMPLER *resampler, sample_t *dst, int32 dst_size, DUMB_VOLUME_RAMP_INFO * volume_left, DUMB_VOLUME_RAMP_INFO * volume_right, double delta);
//int32 dumb_resample_2_1(DUMB_RESAMPLER *resampler, sample_t *dst, int32 dst_size, DUMB_VOLUME_RAMP_INFO * volume_left, DUMB_VOLUME_RAMP_INFO * volume_right, double delta);
int32 dumb_resample_2_2(DUMB_RESAMPLER *resampler, sample_t *dst, int32 dst_size, DUMB_VOLUME_RAMP_INFO * volume_left, DUMB_VOLUME_RAMP_INFO * volume_right, double delta);
//void dumb_resample_get_current_sample_1_1(DUMB_RESAMPLER *resampler, DUMB_VOLUME_RAMP_INFO * volume, sample_t *dst);
void dumb_resample_get_current_sample_1_2(DUMB_RESAMPLER *resampler, DUMB_VOLUME_RAMP_INFO * volume_left, DUMB_VOLUME_RAMP_INFO * volume_right, sample_t *dst);
//void dumb_resample_get_current_sample_2_1(DUMB_RESAMPLER *resampler, DUMB_VOLUME_RAMP_INFO * volume_left, DUMB_VOLUME_RAMP_INFO * volume_right, sample_t *dst);
void dumb_resample_get_current_sample_2_2(DUMB_RESAMPLER *resampler, DUMB_VOLUME_RAMP_INFO * volume_left, DUMB_VOLUME_RAMP_INFO * volume_right, sample_t *dst);
void dumb_end_resampler(DUMB_RESAMPLER *resampler);

void dumb_reset_resampler_16(DUMB_RESAMPLER *resampler, short *src, int src_channels, int32 pos, int32 start, int32 end, int quality);
DUMB_RESAMPLER *dumb_start_resampler_16(short *src, int src_channels, int32 pos, int32 start, int32 end, int quality);
//int32 dumb_resample_16_1_1(DUMB_RESAMPLER *resampler, sample_t *dst, int32 dst_size, DUMB_VOLUME_RAMP_INFO * volume, double delta);
int32 dumb_resample_16_1_2(DUMB_RESAMPLER *resampler, sample_t *dst, int32 dst_size, DUMB_VOLUME_RAMP_INFO * volume_left, DUMB_VOLUME_RAMP_INFO * volume_right, double delta);
//int32 dumb_resample_16_2_1(DUMB_RESAMPLER *resampler, sample_t *dst, int32 dst_size, DUMB_VOLUME_RAMP_INFO * volume_left, DUMB_VOLUME_RAMP_INFO * volume_right, double delta);
int32 dumb_resample_16_2_2(DUMB_RESAMPLER *resampler, sample_t *dst, int32 dst_size, DUMB_VOLUME_RAMP_INFO * volume_left, DUMB_VOLUME_RAMP_INFO * volume_right, double delta);
//void dumb_resample_get_current_sample_16_1_1(DUMB_RESAMPLER *resampler, DUMB_VOLUME_RAMP_INFO * volume, sample_t *dst);
void dumb_resample_get_current_sample_16_1_2(DUMB_RESAMPLER *resampler, DUMB_VOLUME_RAMP_INFO * volume_left, DUMB_VOLUME_RAMP_INFO * volume_right, sample_t *dst);
//void dumb_resample_get_current_sample_16_2_1(DUMB_RESAMPLER *resampler, DUMB_VOLUME_RAMP_INFO * volume_left, DUMB_VOLUME_RAMP_INFO * volume_right, sample_t *dst);
void dumb_resample_get_current_sample_16_2_2(DUMB_RESAMPLER *resampler, DUMB_VOLUME_RAMP_INFO * volume_left, DUMB_VOLUME_RAMP_INFO * volume_right, sample_t *dst);
void dumb_end_resampler_16(DUMB_RESAMPLER *resampler);

void dumb_reset_resampler_8(DUMB_RESAMPLER *resampler, signed char *src, int src_channels, int32 pos, int32 start, int32 end, int quality);
DUMB_RESAMPLER *dumb_start_resampler_8(signed char *src, int src_channels, int32 pos, int32 start, int32 end, int quality);
//int32 dumb_resample_8_1_1(DUMB_RESAMPLER *resampler, sample_t *dst, int32 dst_size, DUMB_VOLUME_RAMP_INFO * volume, double delta);
int32 dumb_resample_8_1_2(DUMB_RESAMPLER *resampler, sample_t *dst, int32 dst_size, DUMB_VOLUME_RAMP_INFO * volume_left, DUMB_VOLUME_RAMP_INFO * volume_right, double delta);
//int32 dumb_resample_8_2_1(DUMB_RESAMPLER *resampler, sample_t *dst, int32 dst_size, DUMB_VOLUME_RAMP_INFO * volume_left, DUMB_VOLUME_RAMP_INFO * volume_right, double delta);
int32 dumb_resample_8_2_2(DUMB_RESAMPLER *resampler, sample_t *dst, int32 dst_size, DUMB_VOLUME_RAMP_INFO * volume_left, DUMB_VOLUME_RAMP_INFO * volume_right, double delta);
//void dumb_resample_get_current_sample_8_1_1(DUMB_RESAMPLER *resampler, DUMB_VOLUME_RAMP_INFO * volume, sample_t *dst);
void dumb_resample_get_current_sample_8_1_2(DUMB_RESAMPLER *resampler, DUMB_VOLUME_RAMP_INFO * volume_left, DUMB_VOLUME_RAMP_INFO * volume_right, sample_t *dst);
//void dumb_resample_get_current_sample_8_2_1(DUMB_RESAMPLER *resampler, DUMB_VOLUME_RAMP_INFO * volume_left, DUMB_VOLUME_RAMP_INFO * volume_right, sample_t *dst);
void dumb_resample_get_current_sample_8_2_2(DUMB_RESAMPLER *resampler, DUMB_VOLUME_RAMP_INFO * volume_left, DUMB_VOLUME_RAMP_INFO * volume_right, sample_t *dst);
void dumb_end_resampler_8(DUMB_RESAMPLER *resampler);

void dumb_reset_resampler_n(int n, DUMB_RESAMPLER *resampler, void *src, int src_channels, int32 pos, int32 start, int32 end, int quality);
DUMB_RESAMPLER *dumb_start_resampler_n(int n, void *src, int src_channels, int32 pos, int32 start, int32 end, int quality);
//int32 dumb_resample_n_1_1(int n, DUMB_RESAMPLER *resampler, sample_t *dst, int32 dst_size, DUMB_VOLUME_RAMP_INFO * volume, double delta);
int32 dumb_resample_n_1_2(int n, DUMB_RESAMPLER *resampler, sample_t *dst, int32 dst_size, DUMB_VOLUME_RAMP_INFO * volume_left, DUMB_VOLUME_RAMP_INFO * volume_right, double delta);
//int32 dumb_resample_n_2_1(int n, DUMB_RESAMPLER *resampler, sample_t *dst, int32 dst_size, DUMB_VOLUME_RAMP_INFO * volume_left, DUMB_VOLUME_RAMP_INFO * volume_right, double delta);
int32 dumb_resample_n_2_2(int n, DUMB_RESAMPLER *resampler, sample_t *dst, int32 dst_size, DUMB_VOLUME_RAMP_INFO * volume_left, DUMB_VOLUME_RAMP_INFO * volume_right, double delta);
//void dumb_resample_get_current_sample_n_1_1(int n, DUMB_RESAMPLER *resampler, DUMB_VOLUME_RAMP_INFO * volume, sample_t *dst);
void dumb_resample_get_current_sample_n_1_2(int n, DUMB_RESAMPLER *resampler, DUMB_VOLUME_RAMP_INFO * volume_left, DUMB_VOLUME_RAMP_INFO * volume_right, sample_t *dst);
//void dumb_resample_get_current_sample_n_2_1(int n, DUMB_RESAMPLER *resampler, DUMB_VOLUME_RAMP_INFO * volume_left, DUMB_VOLUME_RAMP_INFO * volume_right, sample_t *dst);
void dumb_resample_get_current_sample_n_2_2(int n, DUMB_RESAMPLER *resampler, DUMB_VOLUME_RAMP_INFO * volume_left, DUMB_VOLUME_RAMP_INFO * volume_right, sample_t *dst);
void dumb_end_resampler_n(int n, DUMB_RESAMPLER *resampler);


/* DUH Construction */

DUH *make_duh(
	int32 length,
	int n_tags,
	const char *const tag[][2],
	int n_signals,
	DUH_SIGTYPE_DESC *desc[],
	sigdata_t *sigdata[]
);

void DUMBEXPORT duh_set_length(DUH *duh, int32 length);


#ifdef __cplusplus
	}
#endif


#endif /* DUMB_H */
