167 lines
4.6 KiB
C++
167 lines
4.6 KiB
C++
/*************************************************************************/
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/* cp_loader_it_patterns.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* http://www.godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2015 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "cp_loader_it.h"
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CPLoader::Error CPLoader_IT::load_patterns() {
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for (int i=0;i<header.patnum;i++) {
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if (i>=CPSong::MAX_PATTERNS)
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break;
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/* Position where pattern offsets are stored */
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file->seek(0xC0+header.ordnum+header.insnum*4+header.smpnum*4+i*4);
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uint32_t pattern_offset=file->get_dword();
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if (pattern_offset==0) {
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continue;
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}
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uint16_t pat_size;
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uint16_t pat_length;
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int row=0,flag,channel,j;
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uint8_t aux_byte;
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uint32_t reserved;
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uint8_t chan_mask[64]; //mask cache for each
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CPNote last_value[64]; //last value of each
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for (j=0;j<64;j++) {
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chan_mask[j]=0;
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last_value[j].clear();
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}
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file->seek(pattern_offset);
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pat_size=file->get_word();
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pat_length=file->get_word();
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reserved=file->get_dword();
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song->get_pattern(i)->set_length( pat_length );
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do {
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aux_byte=file->get_byte();
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flag=aux_byte;
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if ( flag==0 ) {
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row++;
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} else {
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channel=(flag-1) & 63;
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if ( flag & 128 ) {
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aux_byte=file->get_byte();
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chan_mask[channel]=aux_byte;
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}
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CPNote note; //note used for reading
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if ( chan_mask[channel]&1 ) { // read note
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aux_byte=file->get_byte();
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if ( aux_byte<120 )
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note.note=aux_byte;
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else if ( aux_byte==255 )
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note.note=CPNote::OFF;
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else if ( aux_byte==254 )
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note.note=CPNote::CUT;
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last_value[channel].note=note.note;
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}
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if ( chan_mask[channel]&2 ) {
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aux_byte=file->get_byte();
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if ( aux_byte<100 )
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note.instrument=aux_byte-1;
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last_value[channel].instrument=note.instrument;
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}
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if ( chan_mask[channel]&4 ) {
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aux_byte=file->get_byte();
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if ( aux_byte<213 )
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note.volume=aux_byte;
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last_value[channel].volume=note.volume;
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}
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if ( chan_mask[channel]&8 ) {
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aux_byte=file->get_byte();
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if ( aux_byte>0 )
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note.command=aux_byte-1;
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last_value[channel].command=note.command;
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note.parameter=file->get_byte();
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last_value[channel].parameter=note.parameter;
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}
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if ( chan_mask[channel]&16 ) {
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note.note=last_value[channel].note;
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}
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if ( chan_mask[channel]&32 ) {
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note.instrument=last_value[channel].instrument;
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}
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if ( chan_mask[channel]&64 ) {
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note.volume=last_value[channel].volume;
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}
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if ( chan_mask[channel]&128 ) {
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note.command=last_value[channel].command;
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note.parameter=last_value[channel].parameter;
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}
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song->get_pattern(i)->set_note(channel,row,note);
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}
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} while(row<pat_length);
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}
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return FILE_OK;
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}
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