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godot/drivers/chibi/cp_loader_mod.cpp
Juan Linietsky 0b806ee0fc GODOT IS OPEN SOURCE
2014-02-09 22:10:30 -03:00

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/*************************************************************************/
/* cp_loader_mod.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2014 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_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?
}
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;
int16_t d16=*ds;
d16<<=8;
sm->set_data( sid, s, d16 );
}
}
file->close();
return FILE_OK;
}
CPLoader_MOD::CPLoader_MOD(CPFileAccessWrapper *p_file) {
file=p_file;
}
CPLoader_MOD::~CPLoader_MOD()
{
}
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