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godot/modules/chibi/cp_loader_mod.cpp

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/*************************************************************************/
/* cp_loader_mod.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "cp_loader_mod.h"
static bool tag_equal_to(const char *p_tag, const char *p_string) {
return (p_tag[0] == p_string[0] &&
p_tag[1] == p_string[1] &&
p_tag[2] == p_string[2] &&
p_tag[3] == p_string[3]);
}
/* ProTracker period table */
uint16_t period_table[6 * 12] = {
1712, 1616, 1524, 1440, 1356, 1280, 1208, 1140, 1076, 1016, 960, 907,
856, 808, 762, 720, 678, 640, 604, 570, 538, 508, 480, 453,
428, 404, 381, 360, 339, 320, 302, 285, 269, 254, 240, 226,
214, 202, 190, 180, 170, 160, 151, 143, 135, 127, 120, 113,
107, 101, 95, 90, 85, 80, 75, 71, 67, 63, 60, 56,
53, 50, 47, 45, 42, 40, 37, 35, 33, 31, 30, 28
};
CPLoader::Error CPLoader_MOD::load_song(const char *p_file, CPSong *p_song, bool p_sampleset) {
if (file->open(p_file, CPFileAccessWrapper::READ)) {
//printf("Can't open file! %s\n",p_file);
return FILE_CANNOT_OPEN;
};
/* FIRST OF ALL, one needs to read the .mod file format tag */
file->seek(1080); //located at 1080
char format_tag[4];
file->get_byte_array((uint8_t *)format_tag, 4);
int channels = -1;
/** THE PAIN!! - COMPARE TAGS */
/* Classic 4-chan */
if (tag_equal_to(format_tag, "M.K."))
channels = 4;
if (tag_equal_to(format_tag, "FLT4"))
channels = 4;
if (tag_equal_to(format_tag, "M!K!"))
channels = 4;
/* 8 Channel MODS */
if (tag_equal_to(format_tag, "FLT8"))
channels = 2;
if (tag_equal_to(format_tag, "CD81"))
channels = 2;
/* Custom channel MODS */
for (int i = 1; i <= 32; i++) {
if (i < 10) { // up to 9 channels mods
/* Old Take Tracker */
char old_take_tracker[4] = { 'T', 'D', 'Z', char('0' + i) };
if (tag_equal_to(format_tag, old_take_tracker)) {
channels = i;
break;
}
/* Contemplates many XCHN Formats */
char xchn[4] = { char('0' + i), 'C', 'H', 'N' };
if (tag_equal_to(format_tag, xchn)) {
channels = i;
break;
}
}
/* Fast Tracker */
char fast_tracker[4] = { char('0' + (i / 10)), char('0' + (i % 10)), 'C', 'H' };
if (tag_equal_to(format_tag, fast_tracker)) {
channels = i;
break;
}
}
if (channels == -1) {
file->close();
return FILE_UNRECOGNIZED;
}
/** Load CPSong INFO */
file->seek(0); //go to begining of file
file->set_endian_conversion(true);
p_song->reset();
p_song->set_instruments(false);
char name[21];
file->get_byte_array((uint8_t *)name, 20);
name[20] = 0;
p_song->set_name(name);
p_song->set_old_effects(true);
p_song->set_linear_slides(false);
p_song->set_compatible_gxx(true);
CPSampleManager *sm = CPSampleManager::get_singleton();
int instruments = 31;
for (int i = 0; i < instruments; i++) {
char sample_name[23];
file->get_byte_array((uint8_t *)sample_name, 22);
sample_name[22] = 0;
uint32_t sample_len = file->get_word();
sample_len <<= 1;
uint8_t fine_nibble = file->get_byte() & 0xF;
//(int8_t)(fine_nibble & 7) - (int8_t)(fine_nibble & 8); //yesso's genius trick
// boo, I can't use it :( but i leave it here because of how cool it is
uint8_t linear_volume = file->get_byte(); //0 .. ?
uint32_t loop_begin = file->get_word(); //0 .. ?
loop_begin <<= 1;
uint32_t loop_end = file->get_word(); //0 .. ?
loop_end <<= 1;
if (sample_len > 0) {
CPSample_ID sid = sm->create(false, false, sample_len);
if (sid.is_null()) {
file->close();
return FILE_OUT_OF_MEMORY;
}
if (loop_end > 2) {
sm->set_loop_begin(sid, loop_begin);
sm->set_loop_end(sid, loop_end + loop_begin);
sm->set_loop_type(sid, CP_LOOP_FORWARD);
}
static const uint16_t fine_to_freq[16] = {
8363, 8413, 8463, 8529, 8581, 8651, 8723, 8757,
7895, 7941, 7985, 8046, 8107, 8169, 8232, 8280
};
sm->set_c5_freq(sid, fine_to_freq[fine_nibble]);
p_song->get_sample(i)->set_sample_data(sid);
}
p_song->get_sample(i)->set_name(sample_name);
p_song->get_sample(i)->set_default_volume(linear_volume);
}
/* pan for MODs */
for (int i = 0; i < channels; i++)
p_song->set_channel_pan(i, (((i & 3) == 1) || ((i & 3) == 2)) ? 0 : 64);
uint8_t order_count = file->get_byte();
// uint8_t loop_to=file->get_byte();
int pattern_count = 0;
for (int i = 0; i < 128; i++) {
uint8_t order = file->get_byte();
if (i < order_count) {
p_song->set_order(i, order);
/* Determine the amount of patterns */
if ((order + 1) > pattern_count)
pattern_count = order + 1;
} else
p_song->set_order(i, CP_ORDER_NONE);
}
if (instruments == 31)
file->get_dword(); // identiefier, now skip it
for (int i = 0; i < pattern_count; i++) {
for (int line = 0; line < 64; line++) {
for (int column = 0; column < channels; column++) {
uint32_t note_w = file->get_dword();
CPNote note;
note.instrument = (note_w >> 12) & 0xF;
note.instrument |= (note_w >> 24) & 0xF0;
if (note.instrument == 0)
note.instrument = CPNote::EMPTY;
else
note.instrument--;
note.parameter = note_w & 0xFF;
int cmd = (note_w >> 8) & 0xF;
uint32_t period = (note_w >> 16) & 0xFFF;
if (period > 0 && period < 0xFFF) {
//period>>=2;
//period<<=1;
for (int n = 0; n < 6 * 12; n++) {
if (period >= period_table[n]) {
if ((period != period_table[n]) && (n)) {
uint32_t p1 = period_table[n - 1];
uint32_t p2 = period_table[n];
if (p1 - period < (period - p2)) {
note.note = n + 36;
break;
}
}
note.note = n + 1 + 36;
break;
}
}
if (note.note == CPNote::EMPTY)
note.note = 6 * 12 + 36;
note.note--;
}
switch (cmd) {
case 0x0: {
if (note.parameter > 0)
note.command = 'J' - 'A';
} break;
case 0x1: {
note.command = 'F' - 'A';
} break;
case 0x2: {
note.command = 'E' - 'A';
} break;
case 0x3: {
note.command = 'G' - 'A';
} break;
case 0x4: {
note.command = 'H' - 'A';
} break;
case 0x5: {
note.command = 'L' - 'A';
} break;
case 0x6: {
note.command = 'K' - 'A';
} break;
case 0x7: {
note.command = 'R' - 'A';
} break;
case 0x8: {
note.command = 'X' - 'A';
} break;
case 0x9: {
note.command = 'O' - 'A';
} break;
case 0xA: {
note.command = 'D' - 'A';
} break;
case 0xB: {
note.command = 'B' - 'A';
} break;
case 0xC: {
note.volume = note.parameter;
if (note.volume > 64)
note.volume = 64;
note.parameter = 0;
} break;
case 0xD: {
note.command = 'C' - 'A';
note.parameter = (note.parameter >> 4) * 10 + (note.parameter & 0xF);
} break;
case 0xE: { //SPECIAL EFFECT!
note.command = 'S' - 'A';
switch (note.parameter >> 4) {
case 0x1: {
note.command = 'F' - 'A';
note.parameter = 0xF0 | (note.parameter & 0xF);
} break;
case 0x2: {
note.command = 'E' - 'A';
note.parameter = 0xF0 | (note.parameter & 0xF);
} break;
case 0x4: {
note.command = 'S' - 'A';
note.parameter = 0x30 | (note.parameter & 0x3);
} break;
case 0x6: {
note.command = 'S' - 'A';
note.parameter = 0xB0 | (note.parameter & 0xF);
} break;
case 0x7: {
note.command = 'S' - 'A';
note.parameter = 0x40 | (note.parameter & 0x3);
} break;
case 0x8: {
note.command = 'S' - 'A'; // wow, it's the same!
} break;
case 0x9: {
note.command = 'Q' - 'A';
note.parameter = (note.parameter & 0xF);
} break;
case 0xA: {
note.command = 'D' - 'A';
note.parameter = 0xF | ((note.parameter & 0xF) << 4);
} break;
case 0xB: {
note.command = 'D' - 'A';
note.parameter = 0xF0 | (note.parameter & 0xF);
} break;
case 0xC:
case 0xD: {
note.command = 'S' - 'A'; //wow, they are the same!
} break;
case 0xE: {
note.command = 'S' - 'A';
note.parameter = 0x60 | (note.parameter & 0xF);
} break;
default: {
note.command = CPNote::EMPTY;
note.parameter = 0;
} break;
}
} break;
case 0xF: {
if (note.parameter < 32)
note.command = 'A' - 'A';
else
note.command = 'T' - 'A';
} break;
}
p_song->get_pattern(i)->set_note(column, line, note);
}
}
}
for (int i = 0; i < instruments; i++) {
CPSample_ID sid = p_song->get_sample(i)->get_sample_data();
if (sid.is_null()) {
continue; //empty sample, not stored?
}
sm->lock_data(sid);
uint8_t *dataptr = (uint8_t *)sm->get_data(sid);
int len = sm->get_size(sid);
for (int s = 0; s < len; s++) {
uint8_t d = file->get_byte();
//d-=128; //convert to signed
int8_t *ds = (int8_t *)&d;
dataptr[s] = *ds;
}
sm->unlock_data(sid);
}
file->close();
return FILE_OK;
}
CPLoader_MOD::CPLoader_MOD(CPFileAccessWrapper *p_file) {
file = p_file;
}
CPLoader_MOD::~CPLoader_MOD() {
}
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