godot/modules/chibi/cp_loader_it_patterns.cpp

161 lines
4.7 KiB
C++

/*************************************************************************/
/* cp_loader_it_patterns.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2017 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_it.h"
CPLoader::Error CPLoader_IT::load_patterns() {
for (int i = 0; i < header.patnum; i++) {
if (i >= CPSong::MAX_PATTERNS)
break;
/* Position where pattern offsets are stored */
file->seek(0xC0 + header.ordnum + header.insnum * 4 + header.smpnum * 4 + i * 4);
uint32_t pattern_offset = file->get_dword();
if (pattern_offset == 0) {
continue;
}
uint16_t pat_size;
uint16_t pat_length;
int row = 0, flag, channel, j;
uint8_t aux_byte;
uint32_t reserved;
uint8_t chan_mask[64]; //mask cache for each
CPNote last_value[64]; //last value of each
for (j = 0; j < 64; j++) {
chan_mask[j] = 0;
last_value[j].clear();
}
file->seek(pattern_offset);
pat_size = file->get_word();
pat_length = file->get_word();
reserved = file->get_dword();
song->get_pattern(i)->set_length(pat_length);
do {
aux_byte = file->get_byte();
flag = aux_byte;
if (flag == 0) {
row++;
} else {
channel = (flag - 1) & 63;
if (flag & 128) {
aux_byte = file->get_byte();
chan_mask[channel] = aux_byte;
}
CPNote note; //note used for reading
if (chan_mask[channel] & 1) { // read note
aux_byte = file->get_byte();
if (aux_byte < 120)
note.note = aux_byte;
else if (aux_byte == 255)
note.note = CPNote::OFF;
else if (aux_byte == 254)
note.note = CPNote::CUT;
last_value[channel].note = note.note;
}
if (chan_mask[channel] & 2) {
aux_byte = file->get_byte();
if (aux_byte < 100)
note.instrument = aux_byte - 1;
last_value[channel].instrument = note.instrument;
}
if (chan_mask[channel] & 4) {
aux_byte = file->get_byte();
if (aux_byte < 213)
note.volume = aux_byte;
last_value[channel].volume = note.volume;
}
if (chan_mask[channel] & 8) {
aux_byte = file->get_byte();
if (aux_byte > 0)
note.command = aux_byte - 1;
last_value[channel].command = note.command;
note.parameter = file->get_byte();
last_value[channel].parameter = note.parameter;
}
if (chan_mask[channel] & 16) {
note.note = last_value[channel].note;
}
if (chan_mask[channel] & 32) {
note.instrument = last_value[channel].instrument;
}
if (chan_mask[channel] & 64) {
note.volume = last_value[channel].volume;
}
if (chan_mask[channel] & 128) {
note.command = last_value[channel].command;
note.parameter = last_value[channel].parameter;
}
song->get_pattern(i)->set_note(channel, row, note);
}
} while (row < pat_length);
}
return FILE_OK;
}