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/*************************************************************************/
/* cp_loader_it_patterns.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur. */
/* */
/* 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;
}
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