ref: 657e36b7e60c9781ec4a8715e982955fd34e5305
dir: /src/it/xmeffect.c/
/* _______ ____ __ ___ ___
* \ _ \ \ / \ / \ \ / / ' ' '
* | | \ \ | | || | \/ | . .
* | | | | | | || ||\ /| |
* | | | | | | || || \/ | | ' ' '
* | | | | | | || || | | . .
* | |_/ / \ \__// || | |
* /_______/ynamic \____/niversal /__\ /____\usic /| . . ibliotheque
* / \
* / . \
* xmeffect.c - Code for converting MOD/XM / / \ \
* effects to IT effects. | < / \_
* | \/ /\ /
* By Julien Cugniere. Ripped out of readxm.c \_ / > /
* by entheh. | \ / /
* | ' /
* \__/
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "dumb.h"
#include "internal/it.h"
#if 0
unsigned char **_dumb_malloc2(int w, int h)
{
unsigned char **line = malloc(h * sizeof(*line));
int i;
if (!line) return NULL;
line[0] = malloc(w * h * sizeof(*line[0]));
if (!line[0]) {
free(line);
return NULL;
}
for (i = 1; i < h; i++)
line[i] = line[i-1] + w;
memset(line[0], 0, w*h);
return line;
}
void _dumb_free2(unsigned char **line)
{
if (line) {
if (line[0])
free(line[0]);
free(line);
}
}
/* Effects having a memory. 2 means that the two parts of the effectvalue
* should be handled separately.
*/
static const char xm_has_memory[] = {
/* 0 1 2 3 4 5 6 7 8 9 A B C D (E) F G H K L P R T (X) */
0, 1, 1, 1, 2, 1, 1, 2, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0,
/* E0 E1 E2 E3 E4 E5 E6 E7 E9 EA EB EC ED EE X1 X2 */
0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
};
#endif
/* Effects marked with 'special' are handled specifically in itrender.c */
void _dumb_it_xm_convert_effect(int effect, int value, IT_ENTRY *entry,
int mod) {
const int log = 0;
if ((!effect && !value) || (effect >= XM_N_EFFECTS))
return;
if (log)
printf("%c%02X", (effect < 10) ? ('0' + effect) : ('A' + effect - 10),
value);
/* Linearisation of the effect number... */
if (effect == XM_E) {
effect = EBASE + HIGH(value);
value = LOW(value);
} else if (effect == XM_X) {
effect = XBASE + HIGH(value);
value = LOW(value);
}
if (log)
printf(" - %2d %02X", effect, value);
#if 0 // This should be handled in itrender.c!
/* update effect memory */
switch (xm_has_memory[effect]) {
case 1:
if (!value)
value = memory[entry->channel][effect];
else
memory[entry->channel][effect] = value;
break;
case 2:
if (!HIGH(value))
SET_HIGH(value, HIGH(memory[entry->channel][effect]));
else
SET_HIGH(memory[entry->channel][effect], HIGH(value));
if (!LOW(value))
SET_LOW(value, LOW(memory[entry->channel][effect]));
else
SET_LOW(memory[entry->channel][effect], LOW(value));
break;
}
#endif
/* convert effect */
entry->mask |= IT_ENTRY_EFFECT;
switch (effect) {
case XM_APPREGIO:
effect = IT_ARPEGGIO;
break;
case XM_VIBRATO:
effect = IT_VIBRATO;
break;
case XM_TONE_PORTAMENTO:
effect = IT_TONE_PORTAMENTO;
break;
case XM_TREMOLO:
effect = IT_TREMOLO;
break;
case XM_SET_PANNING:
effect = IT_SET_PANNING;
break;
case XM_SAMPLE_OFFSET:
effect = IT_SET_SAMPLE_OFFSET;
break;
case XM_POSITION_JUMP:
effect = IT_JUMP_TO_ORDER;
break;
case XM_MULTI_RETRIG:
effect = IT_RETRIGGER_NOTE;
break;
case XM_TREMOR:
effect = IT_TREMOR;
break;
case XM_PORTAMENTO_UP:
effect = IT_XM_PORTAMENTO_UP;
break;
case XM_PORTAMENTO_DOWN:
effect = IT_XM_PORTAMENTO_DOWN;
break;
case XM_SET_CHANNEL_VOLUME:
effect = IT_SET_CHANNEL_VOLUME;
break; /* special */
case XM_VOLSLIDE_TONEPORTA:
effect = IT_VOLSLIDE_TONEPORTA;
break; /* special */
case XM_VOLSLIDE_VIBRATO:
effect = IT_VOLSLIDE_VIBRATO;
break; /* special */
case XM_PATTERN_BREAK:
effect = IT_BREAK_TO_ROW;
value = BCD_TO_NORMAL(value);
if (value > 63)
value = 0; /* FT2, maybe ProTracker? */
break;
case XM_VOLUME_SLIDE: /* special */
effect = IT_VOLUME_SLIDE;
value = HIGH(value) ? EFFECT_VALUE(HIGH(value), 0)
: EFFECT_VALUE(0, LOW(value));
break;
case XM_PANNING_SLIDE:
effect = IT_PANNING_SLIDE;
// value = HIGH(value) ? EFFECT_VALUE(HIGH(value), 0) : EFFECT_VALUE(0,
// LOW(value));
value = HIGH(value) ? EFFECT_VALUE(0, HIGH(value))
: EFFECT_VALUE(LOW(value), 0);
break;
case XM_GLOBAL_VOLUME_SLIDE: /* special */
effect = IT_GLOBAL_VOLUME_SLIDE;
value = HIGH(value) ? EFFECT_VALUE(HIGH(value), 0)
: EFFECT_VALUE(0, LOW(value));
break;
case XM_SET_TEMPO_BPM:
if (mod)
effect = (value <= 0x20) ? (IT_SET_SPEED) : (IT_SET_SONG_TEMPO);
else
effect = (value < 0x20) ? (IT_SET_SPEED) : (IT_SET_SONG_TEMPO);
break;
case XM_SET_GLOBAL_VOLUME:
effect = IT_SET_GLOBAL_VOLUME;
value *= 2;
if (value > 128)
value = 128;
break;
case XM_KEY_OFF:
effect = IT_XM_KEY_OFF;
break;
case XM_SET_ENVELOPE_POSITION:
effect = IT_XM_SET_ENVELOPE_POSITION;
break;
case EBASE + XM_E_SET_FILTER:
effect = SBASE + IT_S_SET_FILTER;
break;
case EBASE + XM_E_SET_GLISSANDO_CONTROL:
effect = SBASE + IT_S_SET_GLISSANDO_CONTROL;
break; /** TODO */
case EBASE + XM_E_SET_FINETUNE:
effect = SBASE + IT_S_FINETUNE;
break;
case EBASE + XM_E_SET_LOOP:
effect = SBASE + IT_S_PATTERN_LOOP;
break;
case EBASE + XM_E_NOTE_CUT:
effect = SBASE + IT_S_DELAYED_NOTE_CUT;
break;
case EBASE + XM_E_NOTE_DELAY:
effect = SBASE + IT_S_NOTE_DELAY;
break;
case EBASE + XM_E_PATTERN_DELAY:
effect = SBASE + IT_S_PATTERN_DELAY;
break;
case EBASE + XM_E_SET_PANNING:
effect = SBASE + IT_S_SET_PAN;
break;
case EBASE + XM_E_FINE_VOLSLIDE_UP:
effect = IT_XM_FINE_VOLSLIDE_UP;
break;
case EBASE + XM_E_FINE_VOLSLIDE_DOWN:
effect = IT_XM_FINE_VOLSLIDE_DOWN;
break;
case EBASE + XM_E_SET_MIDI_MACRO:
effect = SBASE + IT_S_SET_MIDI_MACRO;
break;
case EBASE + XM_E_FINE_PORTA_UP:
effect = IT_PORTAMENTO_UP;
value = EFFECT_VALUE(0xF, value);
break;
case EBASE + XM_E_FINE_PORTA_DOWN:
effect = IT_PORTAMENTO_DOWN;
value = EFFECT_VALUE(0xF, value);
break;
case EBASE + XM_E_RETRIG_NOTE:
effect = IT_XM_RETRIGGER_NOTE;
value = EFFECT_VALUE(0, value);
break;
case EBASE + XM_E_SET_VIBRATO_CONTROL:
effect = SBASE + IT_S_SET_VIBRATO_WAVEFORM;
value &= ~4;
break;
case EBASE + XM_E_SET_TREMOLO_CONTROL:
effect = SBASE + IT_S_SET_TREMOLO_WAVEFORM;
value &= ~4;
break;
case XBASE + XM_X_EXTRAFINE_PORTA_UP:
effect = IT_PORTAMENTO_UP;
value = EFFECT_VALUE(0xE, value);
break;
case XBASE + XM_X_EXTRAFINE_PORTA_DOWN:
effect = IT_PORTAMENTO_DOWN;
value = EFFECT_VALUE(0xE, value);
break;
default:
/* user effect (often used in demos for synchronisation) */
entry->mask &= ~IT_ENTRY_EFFECT;
}
if (log)
printf(" - %2d %02X", effect, value);
/* Inverse linearisation... */
if (effect >= SBASE && effect < SBASE + 16) {
value = EFFECT_VALUE(effect - SBASE, value);
effect = IT_S;
}
if (log)
printf(" - %c%02X\n", 'A' + effect - 1, value);
entry->effect = effect;
entry->effectvalue = value;
}