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virtualx-engine/modules/chibi/cp_loader_s3m.cpp
Rémi Verschelde c7bc44d5ad Welcome in 2017, dear changelog reader! 
That year should bring the long-awaited OpenGL ES 3.0 compatible renderer
with state-of-the-art rendering techniques tuned to work as low as middle
end handheld devices - without compromising with the possibilities given
for higher end desktop games of course. Great times ahead for the Godot
community and the gamers that will play our games!
2017-01-01 22:03:33 +01:00

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/*************************************************************************/
/* cp_loader_s3m.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2017 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_s3m.h"
#define BITBOOL(m_exp) ((m_exp)?1:0)
CPLoader::Error CPLoader_S3M::load_header() {
int i;
file->get_byte_array((uint8_t*)header.songname,28);
header.t1a=file->get_byte();
header.type=file->get_byte();
file->get_byte_array((uint8_t*)header.unused1,2);
header.ordnum=file->get_word();
header.insnum=file->get_word();
header.patnum=file->get_word();
header.flags=file->get_word();
header.tracker=file->get_word();
header.fileformat=file->get_word();
file->get_byte_array((uint8_t*)header.scrm,4);
header.scrm[4]=0;
if (header.scrm[0]!='S' || header.scrm[1]!='C' || header.scrm[2]!='R' || header.scrm[3]!='M')
return FILE_UNRECOGNIZED;
header.mastervol=file->get_byte();
header.initspeed=file->get_byte();
header.inittempo=file->get_byte();
header.mastermult=file->get_byte();
header.ultraclick=file->get_byte();
header.pantable=file->get_byte();
file->get_byte_array((uint8_t*)header.unused2,8);
header.special=file->get_word();
file->get_byte_array((uint8_t*)header.channels,32);
file->get_byte_array((uint8_t*)header.orderlist,header.ordnum);
header.scrm[4]=0;
if (header.scrm[0]!='S' || header.scrm[1]!='C' || header.scrm[2]!='R' || header.scrm[3]!='M') //again?
return FILE_UNRECOGNIZED;
//sample parapointers
for (i=0;i<header.insnum;i++) {
int parapointer;
parapointer=file->get_word();
parapointer=(parapointer*16);
sample_parapointers[i]=parapointer;
}
//pattern
for (i=0;i<header.patnum;i++) {
int parapointer;
parapointer=file->get_word();
parapointer=(parapointer*16);
pattern_parapointers[i]=parapointer;
}
if (header.pantable==252) {
file->get_byte_array((uint8_t*)header.pannings,32);
}
return FILE_OK;
}
void CPLoader_S3M::set_header() {
song->set_name( header.songname );
// song->variables.filename=
song->set_row_highlight_minor( 4 );
song->set_row_highlight_major( 16 );
song->set_mixing_volume( header.mastervol );
song->set_linear_slides( false );
song->set_old_effects( !(header.flags&64) );
song->set_compatible_gxx( true );
song->set_global_volume( header.mastermult );
song->set_speed( header.initspeed );
song->set_tempo( header.inittempo );
//[TODO] Set Panning Positions.. ?
for (int i=0;i<header.ordnum;i++) song->set_order(i,header.orderlist[i]);
}
CPLoader::Error CPLoader_S3M::load_sample(CPSample *p_sample) {
int type=file->get_byte();
char filename[13];
file->get_byte_array((uint8_t*)filename,12);
filename[12]=0;
uint32_t samplepos=(uint32_t)file->get_byte() << 16;
samplepos|=file->get_word();
samplepos*=16;
// printf("sample at %i\n",samplepos);
/**/
int sample_size=file->get_dword();
int loop_begin=file->get_dword();
int loop_end=file->get_dword();
int def_volume=file->get_byte();;
int dsk=file->get_byte();
int pack=file->get_byte();
int flags=file->get_byte();
int c2speed=file->get_dword();
file->get_dword(); //useless crap
file->get_dword();
file->get_dword();
char name[29];
file->get_byte_array((uint8_t*)name,28);
name[28]=0;
p_sample->set_default_volume(def_volume);
p_sample->set_name(name);
char scrs[5];
file->get_byte_array((uint8_t*)scrs,4);
scrs[4]=0;
bool data_is_16bits=flags&4;
bool data_is_stereo=flags&2;
if (type==0) {
//empty sample
return FILE_OK;
}
if ((type!=1) || scrs[0]!='S' || scrs[1]!='C' || scrs[2]!='R' || scrs[3]!='S' ) {
// printf("type: %i, %c%c%c%c\n",type,scrs[0],scrs[1],scrs[2],scrs[3]);
CP_PRINTERR("Not an S3M CPSample!");
return FILE_CORRUPTED;
}
//p_sample->data.set_c5_freq(p_sample->c2spd<<1);
file->seek(samplepos);
int real_sample_size=sample_size<<BITBOOL(data_is_16bits);
real_sample_size<<=BITBOOL(data_is_stereo);
CPSampleManager *sm=CPSampleManager::get_singleton();
CPSample_ID id =sm->create( data_is_16bits, data_is_stereo, sample_size );
if (id.is_null())
return FILE_OUT_OF_MEMORY;
sm->lock_data(id);
void *dataptr = sm->get_data(id);
int chans = (data_is_stereo?2:1);
for (int c=0;c<chans;c++) {
for (int i=0;i<sample_size;i++) {
if (data_is_16bits) {
uint16_t s=file->get_word();
s-=32768; //toggle sign
int16_t *v=(int16_t*)&s;
((int16_t*)dataptr)[i*chans+c]=*v;
} else {
int8_t *v;
uint8_t s=file->get_byte();
s-=128; //toggle sign
v=(int8_t*)&s;
((int8_t*)dataptr)[i*chans+c]=*v;
}
}
}
sm->unlock_data(id);
sm->set_loop_begin( id, loop_begin );
sm->set_loop_end( id, loop_end );
sm->set_loop_type( id, (flags&1) ? CP_LOOP_FORWARD : CP_LOOP_NONE );
sm->set_c5_freq( id, c2speed << 1 );
p_sample->set_sample_data(id);
/* Scream tracker previous to 3.10 seems to be buggy, as in, wont save what is after the sample loop, including the loop end point. Because of this I must fix it by habd */
if (flags&1) {
for (int c=0;c<(data_is_stereo?2:1);c++) {
sm->set_data( id, loop_end, sm->get_data( id, loop_begin,c ),c );
}
}
return FILE_OK;
}
CPLoader::Error CPLoader_S3M::load_pattern(CPPattern *p_pattern) {
int row=0,flag,ch;
CPNote n;
int length,accum=0;
length=file->get_word();
p_pattern->set_length(64);
/* clear pattern data */
while((row<64) && (accum<=length) ) {
flag=file->get_byte();
accum++;
n.clear();
if(flag) {
// ch=remap[flag&31];
// ch=remap[flag&31];
// if(ch!=-1)
// n=s3mbuf[(64U*ch)+row];
// else
// n=&dummy;
ch=flag&31;
if(flag&32) {
n.note=file->get_byte();
if (n.note==255) {
n.note=CPNote::EMPTY;
} else if (n.note==254) {
n.note=CPNote::CUT;
} else {
n.note=((n.note>>4)*12)+(n.note&0xF);
}
n.instrument=file->get_byte()-1;
accum+=2;
}
if(flag&64) {
n.volume=file->get_byte();
if (n.volume>64) n.volume=64;
accum++;
}
if(flag&128) {
n.command=file->get_byte()-1;
n.parameter=file->get_byte();
accum+=2;
}
p_pattern->set_note(ch,row,n);
} else row++;
}
return FILE_OK;
}
CPLoader::Error CPLoader_S3M::load_sample(const char *p_file,CPSample *p_sample) {
return FILE_UNRECOGNIZED;
}
CPLoader::Error CPLoader_S3M::load_instrument(const char *p_file,CPSong *p_song,int p_instr_idx) {
return FILE_UNRECOGNIZED;
}
CPLoader::Error CPLoader_S3M::load_samples() {
int i;
for(i=0;i<header.insnum;i++) {
file->seek(sample_parapointers[i]);
load_sample(song->get_sample(i));
sample_count++;
}
return FILE_OK;
}
CPLoader::Error CPLoader_S3M::load_patterns() {
int i;
Error err;
for(i=0;i<header.patnum;i++) {
file->seek(pattern_parapointers[i]);
err=load_pattern(song->get_pattern(i) );
CP_ERR_COND_V(err,err);
pattern_count++;
}
return FILE_OK;
}
CPLoader::Error CPLoader_S3M::load_song(const char *p_file,CPSong *p_song,bool p_sampleset) {
song=p_song;
if (file->open(p_file,CPFileAccessWrapper::READ)) {
//printf("Can't open file! %s\n",p_file);
return FILE_CANNOT_OPEN;
};
sample_count=0;
pattern_count=0;
//printf("LOADING HEADER\n");
CPLoader::Error err;
if ((err=load_header())) {
file->close();
CP_ERR_COND_V(err,err);
}
song->reset(); //file type recognized, reset song!
set_header();
//printf("LOADING SAMPLES\n");
if ((err=load_samples())) {
file->close();
CP_ERR_COND_V(err,err);
}
//printf("LOADING PATTERNS\n");
if ((err=load_patterns())) {
file->close();
return err;
}
file->close();
return FILE_OK;
}
CPLoader_S3M::CPLoader_S3M(CPFileAccessWrapper *p_file){
file=p_file;
}
CPLoader_S3M::~CPLoader_S3M(){
}
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