cog/Frameworks/GME/gme/Kss_Emu.cpp

493 lines
11 KiB
C++

// Game_Music_Emu $vers. http://www.slack.net/~ant/
#include "Kss_Emu.h"
#include "blargg_endian.h"
/* Copyright (C) 2006-2009 Shay Green. This module is free software; you
can redistribute it and/or modify it under the terms of the GNU Lesser
General Public License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version. This
module is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
details. You should have received a copy of the GNU Lesser General Public
License along with this module; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */
#include "blargg_source.h"
#define IF_PTR( ptr ) if ( ptr ) (ptr)
int const clock_rate = 3579545;
#define FOR_EACH_APU( macro )\
{\
macro( sms.psg );\
macro( sms.fm );\
macro( msx.psg );\
macro( msx.scc );\
macro( msx.music );\
macro( msx.audio );\
}
Kss_Emu::Kss_Emu() :
core( this )
{
#define ACTION( apu ) { core.apu = NULL; }
FOR_EACH_APU( ACTION );
#undef ACTION
set_type( gme_kss_type );
}
Kss_Emu::~Kss_Emu()
{
unload();
}
inline void Kss_Emu::Core::unload()
{
#define ACTION( ptr ) { delete (ptr); (ptr) = 0; }
FOR_EACH_APU( ACTION );
#undef ACTION
}
void Kss_Emu::unload()
{
core.unload();
Classic_Emu::unload();
}
// Track info
static void copy_kss_fields( Kss_Core::header_t const& h, track_info_t* out )
{
const char* system = "MSX";
if ( h.device_flags & 0x02 )
{
system = "Sega Master System";
if ( h.device_flags & 0x04 )
system = "Game Gear";
if ( h.device_flags & 0x01 )
system = "Sega Mark III";
}
else
{
if ( h.device_flags & 0x09 )
system = "MSX + FM Sound";
}
Gme_File::copy_field_( out->system, system );
}
static void hash_kss_file( Kss_Core::header_t const& h, byte const* data, int data_size, Music_Emu::Hash_Function& out )
{
out.hash_( &h.load_addr[0], sizeof(h.load_addr) );
out.hash_( &h.load_size[0], sizeof(h.load_size) );
out.hash_( &h.init_addr[0], sizeof(h.init_addr) );
out.hash_( &h.play_addr[0], sizeof(h.play_addr) );
out.hash_( &h.first_bank, sizeof(h.first_bank) );
out.hash_( &h.bank_mode, sizeof(h.bank_mode) );
out.hash_( &h.extra_header, sizeof(h.extra_header) );
out.hash_( &h.device_flags, sizeof(h.device_flags) );
out.hash_( data, data_size );
}
blargg_err_t Kss_Emu::track_info_( track_info_t* out, int ) const
{
copy_kss_fields( header(), out );
// TODO: remove
//if ( msx.music ) strcpy( out->system, "msxmusic" );
//if ( msx.audio ) strcpy( out->system, "msxaudio" );
//if ( sms.fm ) strcpy( out->system, "fmunit" );
return blargg_ok;
}
static blargg_err_t check_kss_header( void const* header )
{
if ( memcmp( header, "KSCC", 4 ) && memcmp( header, "KSSX", 4 ) )
return blargg_err_file_type;
return blargg_ok;
}
struct Kss_File : Gme_Info_
{
Kss_Emu::header_t const* header_;
Kss_File() { set_type( gme_kss_type ); }
blargg_err_t load_mem_( byte const begin [], int size )
{
header_ = ( Kss_Emu::header_t const* ) begin;
if ( header_->tag [3] == 'X' && header_->extra_header == 0x10 )
set_track_count( get_le16( header_->last_track ) + 1 );
return check_kss_header( header_ );
}
blargg_err_t track_info_( track_info_t* out, int ) const
{
copy_kss_fields( *header_, out );
return blargg_ok;
}
blargg_err_t hash_( Hash_Function& out ) const
{
hash_kss_file( *header_, file_begin() + Kss_Core::header_t::base_size, file_end() - file_begin() - Kss_Core::header_t::base_size, out );
return blargg_ok;
}
};
static Music_Emu* new_kss_emu () { return BLARGG_NEW Kss_Emu ; }
static Music_Emu* new_kss_file() { return BLARGG_NEW Kss_File; }
gme_type_t_ const gme_kss_type [1] = {{
"MSX",
256,
&new_kss_emu,
&new_kss_file,
"KSS",
0x03
}};
// Setup
void Kss_Emu::Core::update_gain_()
{
double g = emu.gain();
if ( msx.music || msx.audio || sms.fm )
{
g *= 0.3;
}
else
{
g *= 1.2;
if ( scc_accessed )
g *= 1.4;
}
#define ACTION( apu ) IF_PTR( apu )->volume( g )
FOR_EACH_APU( ACTION );
#undef ACTION
}
static blargg_err_t new_opl_apu( Opl_Apu::type_t type, Opl_Apu** out )
{
check( !*out );
CHECK_ALLOC( *out = BLARGG_NEW( Opl_Apu ) );
blip_time_t const period = 72;
int const rate = clock_rate / period;
return (*out)->init( rate * period, rate, period, type );
}
blargg_err_t Kss_Emu::load_( Data_Reader& in )
{
RETURN_ERR( core.load( in ) );
set_warning( core.warning() );
set_track_count( get_le16( header().last_track ) + 1 );
core.scc_enabled = false;
if ( header().device_flags & 0x02 ) // Sega Master System
{
int const osc_count = Sms_Apu::osc_count + Opl_Apu::osc_count;
static const char* const names [osc_count] = {
"Square 1", "Square 2", "Square 3", "Noise", "FM"
};
set_voice_names( names );
static int const types [osc_count] = {
wave_type+1, wave_type+3, wave_type+2, mixed_type+1, wave_type+0
};
set_voice_types( types );
// sms.psg
set_voice_count( Sms_Apu::osc_count );
check( !core.sms.psg );
CHECK_ALLOC( core.sms.psg = BLARGG_NEW Sms_Apu );
// sms.fm
if ( header().device_flags & 0x01 )
{
set_voice_count( osc_count );
RETURN_ERR( new_opl_apu( Opl_Apu::type_smsfmunit, &core.sms.fm ) );
}
}
else // MSX
{
int const osc_count = Ay_Apu::osc_count + Opl_Apu::osc_count;
static const char* const names [osc_count] = {
"Square 1", "Square 2", "Square 3", "FM"
};
set_voice_names( names );
static int const types [osc_count] = {
wave_type+1, wave_type+3, wave_type+2, wave_type+0
};
set_voice_types( types );
// msx.psg
set_voice_count( Ay_Apu::osc_count );
check( !core.msx.psg );
CHECK_ALLOC( core.msx.psg = BLARGG_NEW Ay_Apu );
if ( header().device_flags & 0x10 )
set_warning( "MSX stereo not supported" );
// msx.music
if ( header().device_flags & 0x01 )
{
set_voice_count( osc_count );
RETURN_ERR( new_opl_apu( Opl_Apu::type_msxmusic, &core.msx.music ) );
}
// msx.audio
if ( header().device_flags & 0x08 )
{
set_voice_count( osc_count );
RETURN_ERR( new_opl_apu( Opl_Apu::type_msxaudio, &core.msx.audio ) );
}
if ( !(header().device_flags & 0x80) )
{
if ( !(header().device_flags & 0x84) )
core.scc_enabled = core.scc_enabled_true;
// msx.scc
check( !core.msx.scc );
CHECK_ALLOC( core.msx.scc = BLARGG_NEW Scc_Apu );
int const osc_count = Ay_Apu::osc_count + Scc_Apu::osc_count;
static const char* const names [osc_count] = {
"Square 1", "Square 2", "Square 3",
"Wave 1", "Wave 2", "Wave 3", "Wave 4", "Wave 5"
};
set_voice_names( names );
static int const types [osc_count] = {
wave_type+1, wave_type+3, wave_type+2,
wave_type+0, wave_type+4, wave_type+5, wave_type+6, wave_type+7,
};
set_voice_types( types );
set_voice_count( osc_count );
}
}
set_silence_lookahead( 6 );
if ( core.sms.fm || core.msx.music || core.msx.audio )
{
if ( !Opl_Apu::supported() )
set_warning( "FM sound not supported" );
else
set_silence_lookahead( 3 ); // Opl_Apu is really slow
}
return setup_buffer( ::clock_rate );
}
void Kss_Emu::update_eq( blip_eq_t const& eq )
{
#define ACTION( apu ) IF_PTR( core.apu )->treble_eq( eq )
FOR_EACH_APU( ACTION );
#undef ACTION
}
void Kss_Emu::set_voice( int i, Blip_Buffer* center, Blip_Buffer* left, Blip_Buffer* right )
{
if ( core.sms.psg ) // Sega Master System
{
i -= core.sms.psg->osc_count;
if ( i < 0 )
{
core.sms.psg->set_output( i + core.sms.psg->osc_count, center, left, right );
return;
}
if ( core.sms.fm && i < core.sms.fm->osc_count )
core.sms.fm->set_output( i, center, NULL, NULL );
}
else if ( core.msx.psg ) // MSX
{
i -= core.msx.psg->osc_count;
if ( i < 0 )
{
core.msx.psg->set_output( i + core.msx.psg->osc_count, center );
return;
}
if ( core.msx.scc && i < core.msx.scc->osc_count ) core.msx.scc ->set_output( i, center );
if ( core.msx.music && i < core.msx.music->osc_count ) core.msx.music->set_output( i, center, NULL, NULL );
if ( core.msx.audio && i < core.msx.audio->osc_count ) core.msx.audio->set_output( i, center, NULL, NULL );
}
}
void Kss_Emu::set_tempo_( double t )
{
int period = (header().device_flags & 0x40 ? ::clock_rate / 50 : ::clock_rate / 60);
core.set_play_period( (Kss_Core::time_t) (period / t) );
}
blargg_err_t Kss_Emu::start_track_( int track )
{
RETURN_ERR( Classic_Emu::start_track_( track ) );
#define ACTION( apu ) IF_PTR( core.apu )->reset()
FOR_EACH_APU( ACTION );
#undef ACTION
core.scc_accessed = false;
core.update_gain_();
return core.start_track( track );
}
void Kss_Emu::Core::cpu_write_( addr_t addr, int data )
{
// TODO: SCC+ support
data &= 0xFF;
switch ( addr )
{
case 0x9000:
set_bank( 0, data );
return;
case 0xB000:
set_bank( 1, data );
return;
case 0xBFFE: // selects between mapping areas (we just always enable both)
if ( data == 0 || data == 0x20 )
return;
}
int scc_addr = (addr & 0xDFFF) - 0x9800;
if ( (unsigned) scc_addr < 0xB0 && msx.scc )
{
scc_accessed = true;
//if ( (unsigned) (scc_addr - 0x90) < 0x10 )
// scc_addr -= 0x10; // 0x90-0x9F mirrors to 0x80-0x8F
if ( scc_addr < Scc_Apu::reg_count )
msx.scc->write( cpu.time(), addr, data );
return;
}
dprintf( "LD ($%04X),$%02X\n", addr, data );
}
void Kss_Emu::Core::cpu_write( addr_t addr, int data )
{
*cpu.write( addr ) = data;
if ( (addr & scc_enabled) == 0x8000 )
cpu_write_( addr, data );
}
void Kss_Emu::Core::cpu_out( time_t time, addr_t addr, int data )
{
data &= 0xFF;
switch ( addr & 0xFF )
{
case 0xA0:
if ( msx.psg )
msx.psg->write_addr( data );
return;
case 0xA1:
if ( msx.psg )
msx.psg->write_data( time, data );
return;
case 0x06:
if ( sms.psg && (header().device_flags & 0x04) )
{
sms.psg->write_ggstereo( time, data );
return;
}
break;
case 0x7E:
case 0x7F:
if ( sms.psg )
{
sms.psg->write_data( time, data );
return;
}
break;
#define OPL_WRITE_HANDLER( base, opl )\
case base : if ( opl ) { opl->write_addr( data ); return; } break;\
case base+1: if ( opl ) { opl->write_data( time, data ); return; } break;
OPL_WRITE_HANDLER( 0x7C, msx.music )
OPL_WRITE_HANDLER( 0xC0, msx.audio )
OPL_WRITE_HANDLER( 0xF0, sms.fm )
case 0xFE:
set_bank( 0, data );
return;
#ifndef NDEBUG
case 0xA8: // PPI
return;
#endif
}
Kss_Core::cpu_out( time, addr, data );
}
int Kss_Emu::Core::cpu_in( time_t time, addr_t addr )
{
switch ( addr & 0xFF )
{
case 0xC0:
case 0xC1:
if ( msx.audio )
return msx.audio->read( time, addr & 1 );
break;
case 0xA2:
if ( msx.psg )
return msx.psg->read();
break;
#ifndef NDEBUG
case 0xA8: // PPI
return 0;
#endif
}
return Kss_Core::cpu_in( time, addr );
}
void Kss_Emu::Core::update_gain()
{
if ( scc_accessed )
{
dprintf( "SCC accessed\n" );
update_gain_();
}
}
blargg_err_t Kss_Emu::run_clocks( blip_time_t& duration, int )
{
RETURN_ERR( core.end_frame( duration ) );
#define ACTION( apu ) IF_PTR( core.apu )->end_frame( duration )
FOR_EACH_APU( ACTION );
#undef ACTION
return blargg_ok;
}
blargg_err_t Kss_Emu::hash_( Hash_Function& out ) const
{
hash_kss_file( header(), core.rom_().begin(), core.rom_().file_size(), out );
return blargg_ok;
}