diff options
Diffstat (limited to 'plugins/dumb/dumb-kode54/include/internal/it.h')
| -rw-r--r-- | plugins/dumb/dumb-kode54/include/internal/it.h | 882 |
1 files changed, 882 insertions, 0 deletions
diff --git a/plugins/dumb/dumb-kode54/include/internal/it.h b/plugins/dumb/dumb-kode54/include/internal/it.h new file mode 100644 index 00000000..fd7cb8b5 --- /dev/null +++ b/plugins/dumb/dumb-kode54/include/internal/it.h @@ -0,0 +1,882 @@ +/* _______ ____ __ ___ ___
+ * \ _ \ \ / \ / \ \ / / ' ' '
+ * | | \ \ | | || | \/ | . .
+ * | | | | | | || ||\ /| |
+ * | | | | | | || || \/ | | ' ' '
+ * | | | | | | || || | | . .
+ * | |_/ / \ \__// || | |
+ * /_______/ynamic \____/niversal /__\ /____\usic /| . . ibliotheque
+ * / \
+ * / . \
+ * internal/it.h - Internal stuff for IT playback / / \ \
+ * and MOD/XM/S3M conversion. | < / \_
+ * | \/ /\ /
+ * This header file provides access to the \_ / > /
+ * internal structure of DUMB, and is liable | \ / /
+ * to change, mutate or cease to exist at any | ' /
+ * moment. Include it at your own peril. \__/
+ *
+ * ...
+ *
+ * Seriously. You don't need access to anything in this file. All right, you
+ * probably do actually. But if you use it, you will be relying on a specific
+ * version of DUMB, so please check DUMB_VERSION defined in dumb.h. Please
+ * contact the authors so that we can provide a public API for what you need.
+ */
+
+#ifndef INTERNAL_IT_H
+#define INTERNAL_IT_H
+
+
+#define BIT_ARRAY_BULLSHIT
+
+#include <stddef.h>
+
+#include "barray.h"
+
+
+/** TO DO: THINK ABOUT THE FOLLOWING:
+
+sigdata->flags & IT_COMPATIBLE_GXX
+
+ Bit 5: On = Link Effect G's memory with Effect E/F. Also
+ Gxx with an instrument present will cause the
+ envelopes to be retriggered. If you change a
+ sample on a row with Gxx, it'll adjust the
+ frequency of the current note according to:
+
+ NewFrequency = OldFrequency * NewC5 / OldC5;
+*/
+
+
+
+/* These #defines are TEMPORARY. They are used to write alternative code to
+ * handle ambiguities in the format specification. The correct code in each
+ * case will be determined most likely by experimentation.
+ */
+#define STEREO_SAMPLES_COUNT_AS_TWO
+#define INVALID_ORDERS_END_SONG
+#define INVALID_NOTES_CAUSE_NOTE_CUT
+#define SUSTAIN_LOOP_OVERRIDES_NORMAL_LOOP
+#define VOLUME_OUT_OF_RANGE_SETS_MAXIMUM
+
+
+
+#define SIGTYPE_IT DUMB_ID('I', 'T', ' ', ' ')
+
+#define IT_SIGNATURE DUMB_ID('I', 'M', 'P', 'M')
+#define IT_INSTRUMENT_SIGNATURE DUMB_ID('I', 'M', 'P', 'I')
+#define IT_SAMPLE_SIGNATURE DUMB_ID('I', 'M', 'P', 'S')
+
+// olivier sux
+#define IT_MPTX_SIGNATURE DUMB_ID('X', 'T', 'P', 'M')
+#define IT_INSM_SIGNATURE DUMB_ID('M', 'S', 'N', 'I')
+
+
+/* 1 minute per 4 rows, each row 6 ticks; this is divided by the tempo to get
+ * the interval between ticks.
+ */
+#define TICK_TIME_DIVIDEND ((65536 * 60) / (4 * 6))
+
+
+
+/* I'm not going to try to explain this, because I didn't derive it very
+ * formally ;)
+ */
+/* #define AMIGA_DIVISOR ((float)(4.0 * 14317056.0)) */
+/* I believe the following one to be more accurate. */
+//#define AMIGA_DIVISOR ((float)(8.0 * 7159090.5))
+#define AMIGA_CLOCK 3546895
+#define AMIGA_DIVISOR ((float)(16.0 * AMIGA_CLOCK))
+
+
+
+typedef struct IT_MIDI IT_MIDI;
+typedef struct IT_FILTER_STATE IT_FILTER_STATE;
+typedef struct IT_ENVELOPE IT_ENVELOPE;
+typedef struct IT_INSTRUMENT IT_INSTRUMENT;
+typedef struct IT_SAMPLE IT_SAMPLE;
+typedef struct IT_ENTRY IT_ENTRY;
+typedef struct IT_PATTERN IT_PATTERN;
+typedef struct IT_PLAYING_ENVELOPE IT_PLAYING_ENVELOPE;
+typedef struct IT_PLAYING IT_PLAYING;
+typedef struct IT_CHANNEL IT_CHANNEL;
+typedef struct IT_CHECKPOINT IT_CHECKPOINT;
+typedef struct IT_CALLBACKS IT_CALLBACKS;
+
+
+
+struct IT_MIDI
+{
+ unsigned char SFmacro[16][16]; // read these from 0x120
+ unsigned char SFmacrolen[16];
+ unsigned short SFmacroz[16]; /* Bitfield; bit 0 set = z in first position */
+ unsigned char Zmacro[128][16]; // read these from 0x320
+ unsigned char Zmacrolen[128];
+};
+
+
+
+struct IT_FILTER_STATE
+{
+ sample_t currsample, prevsample;
+};
+
+
+
+#define IT_ENVELOPE_ON 1
+#define IT_ENVELOPE_LOOP_ON 2
+#define IT_ENVELOPE_SUSTAIN_LOOP 4
+#define IT_ENVELOPE_CARRY 8
+#define IT_ENVELOPE_PITCH_IS_FILTER 128
+
+struct IT_ENVELOPE
+{
+ unsigned char flags;
+ unsigned char n_nodes;
+ unsigned char loop_start;
+ unsigned char loop_end;
+ unsigned char sus_loop_start;
+ unsigned char sus_loop_end;
+ signed char node_y[25];
+ unsigned short node_t[25];
+};
+
+
+
+#define NNA_NOTE_CUT 0
+#define NNA_NOTE_CONTINUE 1
+#define NNA_NOTE_OFF 2
+#define NNA_NOTE_FADE 3
+
+#define DCT_OFF 0
+#define DCT_NOTE 1
+#define DCT_SAMPLE 2
+#define DCT_INSTRUMENT 3
+
+#define DCA_NOTE_CUT 0
+#define DCA_NOTE_OFF 1
+#define DCA_NOTE_FADE 2
+
+struct IT_INSTRUMENT
+{
+ unsigned char name[27];
+ unsigned char filename[14];
+
+ int fadeout;
+
+ IT_ENVELOPE volume_envelope;
+ IT_ENVELOPE pan_envelope;
+ IT_ENVELOPE pitch_envelope;
+
+ unsigned char new_note_action;
+ unsigned char dup_check_type;
+ unsigned char dup_check_action;
+ signed char pp_separation;
+ unsigned char pp_centre;
+ unsigned char global_volume;
+ unsigned char default_pan;
+ unsigned char random_volume;
+ unsigned char random_pan;
+
+ unsigned char filter_cutoff;
+ unsigned char filter_resonance;
+
+ unsigned char map_note[120];
+ unsigned short map_sample[120];
+
+ //int output;
+};
+
+
+
+#define IT_SAMPLE_EXISTS 1
+#define IT_SAMPLE_16BIT 2
+#define IT_SAMPLE_STEREO 4
+#define IT_SAMPLE_LOOP 16
+#define IT_SAMPLE_SUS_LOOP 32
+#define IT_SAMPLE_PINGPONG_LOOP 64
+#define IT_SAMPLE_PINGPONG_SUS_LOOP 128
+
+#define IT_VIBRATO_SINE 0
+#define IT_VIBRATO_SAWTOOTH 1
+#define IT_VIBRATO_SQUARE 2
+#define IT_VIBRATO_RANDOM 3
+#define IT_VIBRATO_XM_SQUARE 4
+#define IT_VIBRATO_RAMP_DOWN 5
+#define IT_VIBRATO_RAMP_UP 6
+
+struct IT_SAMPLE
+{
+ unsigned char name[35];
+ unsigned char filename[14];
+ unsigned char flags;
+ unsigned char global_volume;
+ unsigned char default_volume;
+ unsigned char default_pan;
+ /* default_pan:
+ * 0-255 for XM
+ * ignored for MOD
+ * otherwise, 0-64, and add 128 to enable
+ */
+
+ long length;
+ long loop_start;
+ long loop_end;
+ long C5_speed;
+ long sus_loop_start;
+ long sus_loop_end;
+
+ unsigned char vibrato_speed;
+ unsigned char vibrato_depth;
+ unsigned char vibrato_rate;
+ unsigned char vibrato_waveform;
+
+ signed short finetune;
+
+ void *data;
+
+ int max_resampling_quality;
+};
+
+
+
+#define IT_ENTRY_NOTE 1
+#define IT_ENTRY_INSTRUMENT 2
+#define IT_ENTRY_VOLPAN 4
+#define IT_ENTRY_EFFECT 8
+
+#define IT_SET_END_ROW(entry) ((entry)->channel = 255)
+#define IT_IS_END_ROW(entry) ((entry)->channel >= DUMB_IT_N_CHANNELS)
+
+#define IT_NOTE_OFF 255
+#define IT_NOTE_CUT 254
+
+#define IT_ENVELOPE_SHIFT 8
+
+#define IT_SURROUND 100
+#define IT_IS_SURROUND(pan) ((pan) > 64)
+#define IT_IS_SURROUND_SHIFTED(pan) ((pan) > 64 << IT_ENVELOPE_SHIFT)
+
+#define IT_SET_SPEED 1
+#define IT_JUMP_TO_ORDER 2
+#define IT_BREAK_TO_ROW 3
+#define IT_VOLUME_SLIDE 4
+#define IT_PORTAMENTO_DOWN 5
+#define IT_PORTAMENTO_UP 6
+#define IT_TONE_PORTAMENTO 7
+#define IT_VIBRATO 8
+#define IT_TREMOR 9
+#define IT_ARPEGGIO 10
+#define IT_VOLSLIDE_VIBRATO 11
+#define IT_VOLSLIDE_TONEPORTA 12
+#define IT_SET_CHANNEL_VOLUME 13
+#define IT_CHANNEL_VOLUME_SLIDE 14
+#define IT_SET_SAMPLE_OFFSET 15
+#define IT_PANNING_SLIDE 16
+#define IT_RETRIGGER_NOTE 17
+#define IT_TREMOLO 18
+#define IT_S 19
+#define IT_SET_SONG_TEMPO 20
+#define IT_FINE_VIBRATO 21
+#define IT_SET_GLOBAL_VOLUME 22
+#define IT_GLOBAL_VOLUME_SLIDE 23
+#define IT_SET_PANNING 24
+#define IT_PANBRELLO 25
+#define IT_MIDI_MACRO 26 //see MIDI.TXT
+
+/* Some effects needed for XM compatibility */
+#define IT_XM_PORTAMENTO_DOWN 27
+#define IT_XM_PORTAMENTO_UP 28
+#define IT_XM_FINE_VOLSLIDE_DOWN 29
+#define IT_XM_FINE_VOLSLIDE_UP 30
+#define IT_XM_RETRIGGER_NOTE 31
+#define IT_XM_KEY_OFF 32
+#define IT_XM_SET_ENVELOPE_POSITION 33
+
+/* More effects needed for PTM compatibility */
+#define IT_PTM_NOTE_SLIDE_DOWN 34
+#define IT_PTM_NOTE_SLIDE_UP 35
+#define IT_PTM_NOTE_SLIDE_DOWN_RETRIG 36
+#define IT_PTM_NOTE_SLIDE_UP_RETRIG 37
+
+#define IT_N_EFFECTS 38
+
+/* These represent the top nibble of the command value. */
+#define IT_S_SET_FILTER 0 /* Greyed out in IT... */
+#define IT_S_SET_GLISSANDO_CONTROL 1 /* Greyed out in IT... */
+#define IT_S_FINETUNE 2 /* Greyed out in IT... */
+#define IT_S_SET_VIBRATO_WAVEFORM 3
+#define IT_S_SET_TREMOLO_WAVEFORM 4
+#define IT_S_SET_PANBRELLO_WAVEFORM 5
+#define IT_S_FINE_PATTERN_DELAY 6
+#define IT_S7 7
+#define IT_S_SET_PAN 8
+#define IT_S_SET_SURROUND_SOUND 9
+#define IT_S_SET_HIGH_OFFSET 10
+#define IT_S_PATTERN_LOOP 11
+#define IT_S_DELAYED_NOTE_CUT 12
+#define IT_S_NOTE_DELAY 13
+#define IT_S_PATTERN_DELAY 14
+#define IT_S_SET_MIDI_MACRO 15
+
+/*
+S0x Set filter
+S1x Set glissando control
+S2x Set finetune
+
+
+S3x Set vibrato waveform to type x
+S4x Set tremelo waveform to type x
+S5x Set panbrello waveform to type x
+ Waveforms for commands S3x, S4x and S5x:
+ 0: Sine wave
+ 1: Ramp down
+ 2: Square wave
+ 3: Random wave
+S6x Pattern delay for x ticks
+S70 Past note cut
+S71 Past note off
+S72 Past note fade
+S73 Set NNA to note cut
+S74 Set NNA to continue
+S75 Set NNA to note off
+S76 Set NNA to note fade
+S77 Turn off volume envelope
+S78 Turn on volume envelope
+S79 Turn off panning envelope
+S7A Turn on panning envelope
+S7B Turn off pitch envelope
+S7C Turn on pitch envelope
+S8x Set panning position
+S91 Set surround sound
+SAy Set high value of sample offset yxx00h
+SB0 Set loopback point
+SBx Loop x times to loopback point
+SCx Note cut after x ticks
+SDx Note delay for x ticks
+SEx Pattern delay for x rows
+SFx Set parameterised MIDI Macro
+*/
+
+struct IT_ENTRY
+{
+ unsigned char channel; /* End of row if channel >= DUMB_IT_N_CHANNELS */
+ unsigned char mask;
+ unsigned char note;
+ unsigned char instrument;
+ unsigned char volpan;
+ unsigned char effect;
+ unsigned char effectvalue;
+};
+
+
+
+struct IT_PATTERN
+{
+ int n_rows;
+ int n_entries;
+ IT_ENTRY *entry;
+};
+
+
+
+#define IT_STEREO 1
+#define IT_USE_INSTRUMENTS 4
+#define IT_LINEAR_SLIDES 8 /* If not set, use Amiga slides */
+#define IT_OLD_EFFECTS 16
+#define IT_COMPATIBLE_GXX 32
+
+/* Make sure IT_WAS_AN_XM and IT_WAS_A_MOD aren't set accidentally */
+#define IT_REAL_FLAGS 63
+
+#define IT_WAS_AN_XM 64 /* Set for both XMs and MODs */
+#define IT_WAS_A_MOD 128
+
+#define IT_WAS_AN_S3M 256
+
+#define IT_WAS_A_PTM 512
+
+#define IT_WAS_A_669 1024
+
+#define IT_ORDER_END 255
+#define IT_ORDER_SKIP 254
+
+struct DUMB_IT_SIGDATA
+{
+ unsigned char name[65];
+
+ unsigned char *song_message;
+
+ int n_orders;
+ int n_instruments;
+ int n_samples;
+ int n_patterns;
+ int n_pchannels;
+
+ int flags;
+
+ int global_volume;
+ int mixing_volume;
+ int speed;
+ int tempo;
+ int pan_separation;
+
+ unsigned char channel_pan[DUMB_IT_N_CHANNELS];
+ unsigned char channel_volume[DUMB_IT_N_CHANNELS];
+
+ unsigned char *order;
+ unsigned char restart_position; /* for XM compatiblity */
+
+ IT_INSTRUMENT *instrument;
+ IT_SAMPLE *sample;
+ IT_PATTERN *pattern;
+
+ IT_MIDI *midi;
+
+ IT_CHECKPOINT *checkpoint;
+};
+
+
+
+struct IT_PLAYING_ENVELOPE
+{
+ int next_node;
+ int tick;
+ int value;
+};
+
+
+
+#define IT_PLAYING_BACKGROUND 1
+#define IT_PLAYING_SUSTAINOFF 2
+#define IT_PLAYING_FADING 4
+#define IT_PLAYING_DEAD 8
+
+struct IT_PLAYING
+{
+ int flags;
+
+ int resampling_quality;
+
+ IT_CHANNEL *channel;
+ IT_SAMPLE *sample;
+ IT_INSTRUMENT *instrument;
+ IT_INSTRUMENT *env_instrument;
+
+ unsigned short sampnum;
+ unsigned char instnum;
+
+ unsigned char declick_stage;
+ float declick_volume;
+
+ float float_volume[2];
+ float ramp_volume[2];
+ float ramp_delta[2];
+
+ unsigned char channel_volume;
+
+ unsigned char volume;
+ unsigned short pan;
+
+ signed char volume_offset, panning_offset;
+
+ unsigned char note;
+
+ unsigned char enabled_envelopes;
+
+ unsigned char filter_cutoff;
+ unsigned char filter_resonance;
+
+ unsigned short true_filter_cutoff; /* These incorporate the filter envelope, and will not */
+ unsigned char true_filter_resonance; /* be changed if they would be set to 127<<8 and 0. */
+
+ unsigned char vibrato_speed;
+ unsigned char vibrato_depth;
+ unsigned char vibrato_n; /* May be specified twice: volpan & effect. */
+ unsigned char vibrato_time;
+ unsigned char vibrato_waveform;
+
+ unsigned char tremolo_speed;
+ unsigned char tremolo_depth;
+ unsigned char tremolo_time;
+ unsigned char tremolo_waveform;
+
+ unsigned char panbrello_speed;
+ unsigned char panbrello_depth;
+ unsigned char panbrello_time;
+ unsigned char panbrello_waveform;
+ signed char panbrello_random;
+
+ unsigned char sample_vibrato_time;
+ unsigned char sample_vibrato_waveform;
+ int sample_vibrato_depth; /* Starts at rate?0:depth, increases by rate */
+
+ int slide;
+ float delta;
+ int finetune;
+
+ IT_PLAYING_ENVELOPE volume_envelope;
+ IT_PLAYING_ENVELOPE pan_envelope;
+ IT_PLAYING_ENVELOPE pitch_envelope;
+
+ int fadeoutcount;
+
+ IT_FILTER_STATE filter_state[2]; /* Left and right */
+
+ DUMB_RESAMPLER resampler;
+
+ /* time_lost is used to emulate Impulse Tracker's sample looping
+ * characteristics. When time_lost is added to pos, the result represents
+ * the position in the theoretical version of the sample where all loops
+ * have been expanded. If this is stored, the resampling helpers will
+ * safely convert it for use with new loop boundaries. The situation is
+ * slightly more complicated if dir == -1 when the change takes place; we
+ * must reflect pos off the loop end point and set dir to 1 before
+ * proceeding.
+ */
+ long time_lost;
+
+ //int output;
+};
+
+
+
+#define IT_CHANNEL_MUTED 1
+
+#define IT_ENV_VOLUME 1
+#define IT_ENV_PANNING 2
+#define IT_ENV_PITCH 4
+
+struct IT_CHANNEL
+{
+ int flags;
+
+ unsigned char volume;
+ signed char volslide;
+ signed char xm_volslide;
+ signed char panslide;
+
+ /* xm_volslide is used for volume slides done in the volume column in an
+ * XM file, since it seems the volume column slide is applied first,
+ * followed by clamping, followed by the effects column slide. IT does
+ * not exhibit this behaviour, so xm_volslide is maintained at zero.
+ */
+
+ unsigned char pan;
+ unsigned short truepan;
+
+ unsigned char channelvolume;
+ signed char channelvolslide;
+
+ unsigned char instrument;
+ unsigned char note;
+
+ unsigned char SFmacro;
+
+ unsigned char filter_cutoff;
+ unsigned char filter_resonance;
+
+ unsigned char key_off_count;
+ unsigned char note_cut_count;
+ unsigned char note_delay_count;
+ IT_ENTRY *note_delay_entry;
+
+ unsigned char new_note_action;
+
+ int arpeggio;
+ unsigned char retrig;
+ unsigned char xm_retrig;
+ int retrig_tick;
+
+ unsigned char tremor;
+ unsigned char tremor_time; /* Bit 6 set if note on; bit 7 set if tremor active. */
+
+ unsigned char vibrato_waveform;
+ unsigned char tremolo_waveform;
+ unsigned char panbrello_waveform;
+
+ int portamento;
+ int toneporta;
+ int toneslide;
+ unsigned char toneslide_tick, last_toneslide_tick, ptm_toneslide, ptm_last_toneslide;
+ unsigned char destnote;
+ unsigned char toneslide_retrig;
+
+ unsigned char glissando;
+
+ /** WARNING - for neatness, should one or both of these be in the IT_PLAYING struct? */
+ unsigned short sample;
+ unsigned char truenote;
+
+ unsigned char midi_state;
+
+ signed char lastvolslide;
+ unsigned char lastDKL;
+ unsigned char lastEF; /* Doubles as last portamento up for XM files */
+ unsigned char lastG;
+ unsigned char lastHspeed;
+ unsigned char lastHdepth;
+ unsigned char lastRspeed;
+ unsigned char lastRdepth;
+ unsigned char lastYspeed;
+ unsigned char lastYdepth;
+ unsigned char lastI;
+ unsigned char lastJ; /* Doubles as last portamento down for XM files */
+ unsigned char lastN;
+ unsigned char lastO;
+ unsigned char high_offset;
+ unsigned char lastP;
+ unsigned char lastQ;
+ unsigned char lastS;
+ unsigned char pat_loop_row;
+ unsigned char pat_loop_count;
+ unsigned char pat_loop_end_row; /* Used to catch infinite pattern loops */
+ unsigned char lastW;
+
+ unsigned char xm_lastE1;
+ unsigned char xm_lastE2;
+ unsigned char xm_lastEA;
+ unsigned char xm_lastEB;
+ unsigned char xm_lastX1;
+ unsigned char xm_lastX2;
+
+ IT_PLAYING *playing;
+
+#ifdef BIT_ARRAY_BULLSHIT
+ void * played_patjump;
+ int played_patjump_order;
+#endif
+
+ //int output;
+};
+
+
+
+struct DUMB_IT_SIGRENDERER
+{
+ DUMB_IT_SIGDATA *sigdata;
+
+ int n_channels;
+
+ int resampling_quality;
+
+ unsigned char globalvolume;
+ signed char globalvolslide;
+
+ int tempo;
+ signed char temposlide;
+
+ IT_CHANNEL channel[DUMB_IT_N_CHANNELS];
+
+ IT_PLAYING *playing[DUMB_IT_N_NNA_CHANNELS];
+
+ int tick;
+ int speed;
+ int rowcount;
+
+ int order; /* Set to -1 if the song is terminated by a callback. */
+ int row;
+ int processorder;
+ int processrow;
+ int breakrow;
+
+ int restart_position;
+
+ int n_rows;
+
+ IT_ENTRY *entry_start;
+ IT_ENTRY *entry;
+ IT_ENTRY *entry_end;
+
+ long time_left; /* Time before the next tick is processed */
+ int sub_time_left;
+
+ DUMB_CLICK_REMOVER **click_remover;
+
+ IT_CALLBACKS *callbacks;
+
+#ifdef BIT_ARRAY_BULLSHIT
+ /* bit array, which rows are played, only checked by pattern break or loop commands */
+ void * played;
+#endif
+
+ long gvz_time;
+ int gvz_sub_time;
+
+ int ramp_style;
+
+ //int max_output;
+};
+
+
+
+struct IT_CHECKPOINT
+{
+ IT_CHECKPOINT *next;
+ long time;
+ DUMB_IT_SIGRENDERER *sigrenderer;
+};
+
+
+
+struct IT_CALLBACKS
+{
+ int (*loop)(void *data);
+ void *loop_data;
+ /* Return 1 to prevent looping; the music will terminate abruptly. If you
+ * want to make the music stop but allow samples to fade (beware, as they
+ * might not fade at all!), use dumb_it_sr_set_speed() and set the speed
+ * to 0. Note that xm_speed_zero() will not be called if you set the
+ * speed manually, and also that this will work for IT and S3M files even
+ * though the music can't stop in this way by itself.
+ */
+
+ int (*xm_speed_zero)(void *data);
+ void *xm_speed_zero_data;
+ /* Return 1 to terminate the mod, without letting samples fade. */
+
+ int (*midi)(void *data, int channel, unsigned char byte);
+ void *midi_data;
+ /* Return 1 to prevent DUMB from subsequently interpreting the MIDI bytes
+ * itself. In other words, return 1 if the Zxx macros in an IT file are
+ * controlling filters and shouldn't be.
+ */
+
+ int (*global_volume_zero)(void *data);
+ void *global_volume_zero_data;
+ /* Return 1 to terminate the module when global volume is set to zero. */
+};
+
+
+
+void _dumb_it_end_sigrenderer(sigrenderer_t *sigrenderer);
+void _dumb_it_unload_sigdata(sigdata_t *vsigdata);
+
+extern DUH_SIGTYPE_DESC _dumb_sigtype_it;
+
+
+
+#define XM_APPREGIO 0
+#define XM_PORTAMENTO_UP 1
+#define XM_PORTAMENTO_DOWN 2
+#define XM_TONE_PORTAMENTO 3
+#define XM_VIBRATO 4
+#define XM_VOLSLIDE_TONEPORTA 5
+#define XM_VOLSLIDE_VIBRATO 6
+#define XM_TREMOLO 7
+#define XM_SET_PANNING 8
+#define XM_SAMPLE_OFFSET 9
+#define XM_VOLUME_SLIDE 10 /* A */
+#define XM_POSITION_JUMP 11 /* B */
+#define XM_SET_CHANNEL_VOLUME 12 /* C */
+#define XM_PATTERN_BREAK 13 /* D */
+#define XM_E 14 /* E */
+#define XM_SET_TEMPO_BPM 15 /* F */
+#define XM_SET_GLOBAL_VOLUME 16 /* G */
+#define XM_GLOBAL_VOLUME_SLIDE 17 /* H */
+#define XM_KEY_OFF 20 /* K (undocumented) */
+#define XM_SET_ENVELOPE_POSITION 21 /* L */
+#define XM_PANNING_SLIDE 25 /* P */
+#define XM_MULTI_RETRIG 27 /* R */
+#define XM_TREMOR 29 /* T */
+#define XM_X 33 /* X */
+#define XM_N_EFFECTS (10+26)
+
+#define XM_E_SET_FILTER 0x0
+#define XM_E_FINE_PORTA_UP 0x1
+#define XM_E_FINE_PORTA_DOWN 0x2
+#define XM_E_SET_GLISSANDO_CONTROL 0x3
+#define XM_E_SET_VIBRATO_CONTROL 0x4
+#define XM_E_SET_FINETUNE 0x5
+#define XM_E_SET_LOOP 0x6
+#define XM_E_SET_TREMOLO_CONTROL 0x7
+#define XM_E_SET_PANNING 0x8
+#define XM_E_RETRIG_NOTE 0x9
+#define XM_E_FINE_VOLSLIDE_UP 0xA
+#define XM_E_FINE_VOLSLIDE_DOWN 0xB
+#define XM_E_NOTE_CUT 0xC
+#define XM_E_NOTE_DELAY 0xD
+#define XM_E_PATTERN_DELAY 0xE
+
+#define XM_X_EXTRAFINE_PORTA_UP 1
+#define XM_X_EXTRAFINE_PORTA_DOWN 2
+
+/* To make my life a bit simpler during conversion, effect E:xy is converted
+ * to effect number EBASE+x:y. The same applies to effect X, and IT's S. That
+ * way, these effects can be manipulated like regular effects.
+ */
+#define EBASE (XM_N_EFFECTS)
+#define XBASE (EBASE+16)
+#define SBASE (IT_N_EFFECTS)
+
+#define EFFECT_VALUE(x, y) (((x)<<4)|(y))
+#define HIGH(v) ((v)>>4)
+#define LOW(v) ((v)&0x0F)
+#define SET_HIGH(v, x) v = (((x)<<4)|((v)&0x0F))
+#define SET_LOW(v, y) v = (((v)&0xF0)|(y))
+#define BCD_TO_NORMAL(v) (HIGH(v)*10+LOW(v))
+
+
+
+#if 0
+unsigned char **_dumb_malloc2(int w, int h);
+void _dumb_free2(unsigned char **line);
+#endif
+
+void _dumb_it_xm_convert_effect(int effect, int value, IT_ENTRY *entry, int mod);
+int _dumb_it_fix_invalid_orders(DUMB_IT_SIGDATA *sigdata);
+
+
+#define PTM_APPREGIO 0
+#define PTM_PORTAMENTO_UP 1
+#define PTM_PORTAMENTO_DOWN 2
+#define PTM_TONE_PORTAMENTO 3
+#define PTM_VIBRATO 4
+#define PTM_VOLSLIDE_TONEPORTA 5
+#define PTM_VOLSLIDE_VIBRATO 6
+#define PTM_TREMOLO 7
+#define PTM_SAMPLE_OFFSET 9
+#define PTM_VOLUME_SLIDE 10 /* A */
+#define PTM_POSITION_JUMP 11 /* B */
+#define PTM_SET_CHANNEL_VOLUME 12 /* C */
+#define PTM_PATTERN_BREAK 13 /* D */
+#define PTM_E 14 /* E */
+#define PTM_SET_TEMPO_BPM 15 /* F */
+#define PTM_SET_GLOBAL_VOLUME 16 /* G */
+#define PTM_RETRIGGER 17 /* H */
+#define PTM_FINE_VIBRATO 18 /* I */
+#define PTM_NOTE_SLIDE_UP 19 /* J */
+#define PTM_NOTE_SLIDE_DOWN 20 /* K */
+#define PTM_NOTE_SLIDE_UP_RETRIG 21 /* L */
+#define PTM_NOTE_SLIDE_DOWN_RETRIG 22 /* M */
+#define PTM_N_EFFECTS 23
+
+#define PTM_E_FINE_PORTA_DOWN 0x1
+#define PTM_E_FINE_PORTA_UP 0x2
+#define PTM_E_SET_VIBRATO_CONTROL 0x4
+#define PTM_E_SET_FINETUNE 0x5
+#define PTM_E_SET_LOOP 0x6
+#define PTM_E_SET_TREMOLO_CONTROL 0x7
+#define PTM_E_SET_PANNING 0x8
+#define PTM_E_RETRIG_NOTE 0x9
+#define PTM_E_FINE_VOLSLIDE_UP 0xA
+#define PTM_E_FINE_VOLSLIDE_DOWN 0xB
+#define PTM_E_NOTE_CUT 0xC
+#define PTM_E_NOTE_DELAY 0xD
+#define PTM_E_PATTERN_DELAY 0xE
+
+/* To make my life a bit simpler during conversion, effect E:xy is converted
+ * to effect number EBASE+x:y. The same applies to effect X, and IT's S. That
+ * way, these effects can be manipulated like regular effects.
+ */
+#define PTM_EBASE (PTM_N_EFFECTS)
+
+void _dumb_it_ptm_convert_effect(int effect, int value, IT_ENTRY *entry);
+
+long _dumb_it_read_sample_data_adpcm4(IT_SAMPLE *sample, DUMBFILE *f);
+
+#define min(x,y) ((x)<(y)?(x):(y))
+#define max(x,y) ((x)>(y)?(x):(y))
+
+#endif /* INTERNAL_IT_H */
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