1 files changed, 416 insertions, 0 deletions
diff --git a/plugins/gme/game-music-emu-0.6.0/gme/Kss_Emu.cpp b/plugins/gme/game-music-emu-0.6.0/gme/Kss_Emu.cpp
new file mode 100644
index 00000000..3b84509c
--- /dev/null
+++ b/plugins/gme/game-music-emu-0.6.0/gme/Kss_Emu.cpp
@@ -0,0 +1,416 @@
+// Game_Music_Emu 0.5.5. http://www.slack.net/~ant/
+
+#include "Kss_Emu.h"
+
+#include "blargg_endian.h"
+#include <string.h>
+
+/* Copyright (C) 2006 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"
+
+long const clock_rate = 3579545;
+int const osc_count = Ay_Apu::osc_count + Scc_Apu::osc_count;
+
+Kss_Emu::Kss_Emu()
+{
+	sn = 0;
+	set_type( gme_kss_type );
+	set_silence_lookahead( 6 );
+	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 | 0, wave_type | 1, wave_type | 2,
+		wave_type | 3, wave_type | 4, wave_type | 5, wave_type | 6, wave_type | 7
+	};
+	set_voice_types( types );
+	
+	memset( unmapped_read, 0xFF, sizeof unmapped_read );
+}
+
+Kss_Emu::~Kss_Emu() { unload(); }
+
+void Kss_Emu::unload()
+{
+	delete sn;
+	sn = 0;
+	Classic_Emu::unload();
+}
+
+// Track info
+
+static void copy_kss_fields( Kss_Emu::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";
+	}
+	Gme_File::copy_field_( out->system, system );
+}
+
+blargg_err_t Kss_Emu::track_info_( track_info_t* out, int ) const
+{
+	copy_kss_fields( header_, out );
+	return 0;
+}
+
+static blargg_err_t check_kss_header( void const* header )
+{
+	if ( memcmp( header, "KSCC", 4 ) && memcmp( header, "KSSX", 4 ) )
+		return gme_wrong_file_type;
+	return 0;
+}
+
+struct Kss_File : Gme_Info_
+{
+	Kss_Emu::header_t header_;
+	
+	Kss_File() { set_type( gme_kss_type ); }
+	
+	blargg_err_t load_( Data_Reader& in )
+	{
+		blargg_err_t err = in.read( &header_, Kss_Emu::header_size );
+		if ( err )
+			return (err == in.eof_error ? gme_wrong_file_type : err);
+		return check_kss_header( &header_ );
+	}
+	
+	blargg_err_t track_info_( track_info_t* out, int ) const
+	{
+		copy_kss_fields( header_, out );
+		return 0;
+	}
+};
+
+static Music_Emu* new_kss_emu () { return BLARGG_NEW Kss_Emu ; }
+static Music_Emu* new_kss_file() { return BLARGG_NEW Kss_File; }
+
+static gme_type_t_ const gme_kss_type_ = { "MSX", 256, &new_kss_emu, &new_kss_file, "KSS", 0x03 };
+gme_type_t const gme_kss_type = &gme_kss_type_;
+
+
+// Setup
+
+void Kss_Emu::update_gain()
+{
+	double g = gain() * 1.4;
+	if ( scc_accessed )
+		g *= 1.5;
+	ay.volume( g );
+	scc.volume( g );
+	if ( sn )
+		sn->volume( g );
+}
+
+blargg_err_t Kss_Emu::load_( Data_Reader& in )
+{
+	memset( &header_, 0, sizeof header_ );
+	assert( offsetof (header_t,device_flags) == header_size - 1 );
+	assert( offsetof (ext_header_t,msx_audio_vol) == ext_header_size - 1 );
+	RETURN_ERR( rom.load( in, header_size, STATIC_CAST(header_t*,&header_), 0 ) );
+	
+	RETURN_ERR( check_kss_header( header_.tag ) );
+	
+	if ( header_.tag [3] == 'C' )
+	{
+		if ( header_.extra_header )
+		{
+			header_.extra_header = 0;
+			set_warning( "Unknown data in header" );
+		}
+		if ( header_.device_flags & ~0x0F )
+		{
+			header_.device_flags &= 0x0F;
+			set_warning( "Unknown data in header" );
+		}
+	}
+	else
+	{
+		ext_header_t& ext = header_;
+		memcpy( &ext, rom.begin(), min( (int) ext_header_size, (int) header_.extra_header ) );
+		if ( header_.extra_header > 0x10 )
+			set_warning( "Unknown data in header" );
+	}
+	
+	if ( header_.device_flags & 0x09 )
+		set_warning( "FM sound not supported" );
+	
+	scc_enabled = 0xC000;
+	if ( header_.device_flags & 0x04 )
+		scc_enabled = 0;
+	
+	if ( header_.device_flags & 0x02 && !sn )
+		CHECK_ALLOC( sn = BLARGG_NEW( Sms_Apu ) );
+	
+	set_voice_count( osc_count );
+	
+	return setup_buffer( ::clock_rate );
+}
+
+void Kss_Emu::update_eq( blip_eq_t const& eq )
+{
+	ay.treble_eq( eq );
+	scc.treble_eq( eq );
+	if ( sn )
+		sn->treble_eq( eq );
+}
+
+void Kss_Emu::set_voice( int i, Blip_Buffer* center, Blip_Buffer* left, Blip_Buffer* right )
+{
+	int i2 = i - ay.osc_count;
+	if ( i2 >= 0 )
+		scc.osc_output( i2, center );
+	else
+		ay.osc_output( i, center );
+	if ( sn && i < sn->osc_count )
+		sn->osc_output( i, center, left, right );
+}
+
+// Emulation
+
+void Kss_Emu::set_tempo_( double t )
+{
+	blip_time_t period =
+			(header_.device_flags & 0x40 ? ::clock_rate / 50 : ::clock_rate / 60);
+	play_period = blip_time_t (period / t);
+}
+
+blargg_err_t Kss_Emu::start_track_( int track )
+{
+	RETURN_ERR( Classic_Emu::start_track_( track ) );
+
+	memset( ram, 0xC9, 0x4000 );
+	memset( ram + 0x4000, 0, sizeof ram - 0x4000 );
+	
+	// copy driver code to lo RAM
+	static byte const bios [] = {
+		0xD3, 0xA0, 0xF5, 0x7B, 0xD3, 0xA1, 0xF1, 0xC9, // $0001: WRTPSG
+		0xD3, 0xA0, 0xDB, 0xA2, 0xC9                    // $0009: RDPSG
+	};
+	static byte const vectors [] = {
+		0xC3, 0x01, 0x00,   // $0093: WRTPSG vector
+		0xC3, 0x09, 0x00,   // $0096: RDPSG vector
+	};
+	memcpy( ram + 0x01, bios,    sizeof bios );
+	memcpy( ram + 0x93, vectors, sizeof vectors );
+	
+	// copy non-banked data into RAM
+	unsigned load_addr = get_le16( header_.load_addr );
+	long orig_load_size = get_le16( header_.load_size );
+	long load_size = min( orig_load_size, rom.file_size() );
+	load_size = min( load_size, long (mem_size - load_addr) );
+	if ( load_size != orig_load_size )
+		set_warning( "Excessive data size" );
+	memcpy( ram + load_addr, rom.begin() + header_.extra_header, load_size );
+	
+	rom.set_addr( -load_size - header_.extra_header );
+	
+	// check available bank data
+	blargg_long const bank_size = this->bank_size();
+	int max_banks = (rom.file_size() - load_size + bank_size - 1) / bank_size;
+	bank_count = header_.bank_mode & 0x7F;
+	if ( bank_count > max_banks )
+	{
+		bank_count = max_banks;
+		set_warning( "Bank data missing" );
+	}
+	//debug_printf( "load_size : $%X\n", load_size );
+	//debug_printf( "bank_size : $%X\n", bank_size );
+	//debug_printf( "bank_count: %d (%d claimed)\n", bank_count, header_.bank_mode & 0x7F );
+	
+	ram [idle_addr] = 0xFF;
+	cpu::reset( unmapped_write, unmapped_read );
+	cpu::map_mem( 0, mem_size, ram, ram );
+	
+	ay.reset();
+	scc.reset();
+	if ( sn )
+		sn->reset();
+	r.sp = 0xF380;
+	ram [--r.sp] = idle_addr >> 8;
+	ram [--r.sp] = idle_addr & 0xFF;
+	r.b.a = track;
+	r.pc = get_le16( header_.init_addr );
+	next_play = play_period;
+	scc_accessed = false;
+	gain_updated = false;
+	update_gain();
+	ay_latch = 0;
+	
+	return 0;
+}
+
+void Kss_Emu::set_bank( int logical, int physical )
+{
+	unsigned const bank_size = this->bank_size();
+	
+	unsigned addr = 0x8000;
+	if ( logical && bank_size == 8 * 1024 )
+		addr = 0xA000;
+	
+	physical -= header_.first_bank;
+	if ( (unsigned) physical >= (unsigned) bank_count )
+	{
+		byte* data = ram + addr;
+		cpu::map_mem( addr, bank_size, data, data );
+	}
+	else
+	{
+		long phys = physical * (blargg_long) bank_size;
+		for ( unsigned offset = 0; offset < bank_size; offset += page_size )
+			cpu::map_mem( addr + offset, page_size,
+					unmapped_write, rom.at_addr( phys + offset ) );
+	}
+}
+
+void Kss_Emu::cpu_write( unsigned addr, int data )
+{
+	data &= 0xFF;
+	switch ( addr )
+	{
+	case 0x9000:
+		set_bank( 0, data );
+		return;
+	
+	case 0xB000:
+		set_bank( 1, data );
+		return;
+	}
+	
+	int scc_addr = (addr & 0xDFFF) ^ 0x9800;
+	if ( scc_addr < scc.reg_count )
+	{
+		scc_accessed = true;
+		scc.write( time(), scc_addr, data );
+		return;
+	}
+	
+	debug_printf( "LD ($%04X),$%02X\n", addr, data );
+}
+
+void kss_cpu_write( Kss_Cpu* cpu, unsigned addr, int data )
+{
+	*cpu->write( addr ) = data;
+	if ( (addr & STATIC_CAST(Kss_Emu&,*cpu).scc_enabled) == 0x8000 )
+		STATIC_CAST(Kss_Emu&,*cpu).cpu_write( addr, data );
+}
+
+void kss_cpu_out( Kss_Cpu* cpu, cpu_time_t time, unsigned addr, int data )
+{
+	data &= 0xFF;
+	Kss_Emu& emu = STATIC_CAST(Kss_Emu&,*cpu);
+	switch ( addr & 0xFF )
+	{
+	case 0xA0:
+		emu.ay_latch = data & 0x0F;
+		return;
+	
+	case 0xA1:
+		GME_APU_HOOK( &emu, emu.ay_latch, data );
+		emu.ay.write( time, emu.ay_latch, data );
+		return;
+	
+	case 0x06:
+		if ( emu.sn && (emu.header_.device_flags & 0x04) )
+		{
+			emu.sn->write_ggstereo( time, data );
+			return;
+		}
+		break;
+	
+	case 0x7E:
+	case 0x7F:
+		if ( emu.sn )
+		{
+			GME_APU_HOOK( &emu, 16, data );
+			emu.sn->write_data( time, data );
+			return;
+		}
+		break;
+	
+	case 0xFE:
+		emu.set_bank( 0, data );
+		return;
+	
+	#ifndef NDEBUG
+	case 0xF1: // FM data
+		if ( data )
+			break; // trap non-zero data
+	case 0xF0: // FM addr
+	case 0xA8: // PPI
+		return;
+	#endif
+	}
+	
+	debug_printf( "OUT $%04X,$%02X\n", addr, data );
+}
+
+int kss_cpu_in( Kss_Cpu*, cpu_time_t, unsigned addr )
+{
+	//Kss_Emu& emu = STATIC_CAST(Kss_Emu&,*cpu);
+	//switch ( addr & 0xFF )
+	//{
+	//}
+	
+	debug_printf( "IN $%04X\n", addr );
+	return 0;
+}
+
+// Emulation
+
+blargg_err_t Kss_Emu::run_clocks( blip_time_t& duration, int )
+{
+	while ( time() < duration )
+	{
+		blip_time_t end = min( duration, next_play );
+		cpu::run( min( duration, next_play ) );
+		if ( r.pc == idle_addr )
+			set_time( end );
+		
+		if ( time() >= next_play )
+		{
+			next_play += play_period;
+			if ( r.pc == idle_addr )
+			{
+				if ( !gain_updated )
+				{
+					gain_updated = true;
+					if ( scc_accessed )
+						update_gain();
+				}
+				
+				ram [--r.sp] = idle_addr >> 8;
+				ram [--r.sp] = idle_addr & 0xFF;
+				r.pc = get_le16( header_.play_addr );
+				GME_FRAME_HOOK( this );
+			}
+		}
+	}
+	
+	duration = time();
+	next_play -= duration;
+	check( next_play >= 0 );
+	adjust_time( -duration );
+	ay.end_frame( duration );
+	scc.end_frame( duration );
+	if ( sn )
+		sn->end_frame( duration );
+	
+	return 0;
+}