1 files changed, 0 insertions, 306 deletions
diff --git a/plugins/gme/game-music-emu-svn/gme/Gb_Apu.cpp b/plugins/gme/game-music-emu-svn/gme/Gb_Apu.cpp
deleted file mode 100644
index 866594dd..00000000
--- a/plugins/gme/game-music-emu-svn/gme/Gb_Apu.cpp
+++ /dev/null
@@ -1,306 +0,0 @@
-// Gb_Snd_Emu 0.1.5. http://www.slack.net/~ant/
-
-#include "Gb_Apu.h"
-
-#include <string.h>
-
-/* Copyright (C) 2003-2006 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"
-
-unsigned const vol_reg    = 0xFF24;
-unsigned const status_reg = 0xFF26;
-
-Gb_Apu::Gb_Apu()
-{
-	square1.synth = &square_synth;
-	square2.synth = &square_synth;
-	wave.synth  = &other_synth;
-	noise.synth = &other_synth;
-	
-	oscs [0] = &square1;
-	oscs [1] = &square2;
-	oscs [2] = &wave;
-	oscs [3] = &noise;
-	
-	for ( int i = 0; i < osc_count; i++ )
-	{
-		Gb_Osc& osc = *oscs [i];
-		osc.regs = &regs [i * 5];
-		osc.output = 0;
-		osc.outputs [0] = 0;
-		osc.outputs [1] = 0;
-		osc.outputs [2] = 0;
-		osc.outputs [3] = 0;
-	}
-	
-	set_tempo( 1.0 );
-	volume( 1.0 );
-	reset();
-}
-
-void Gb_Apu::treble_eq( const blip_eq_t& eq )
-{
-	square_synth.treble_eq( eq );
-	other_synth.treble_eq( eq );
-}
-
-void Gb_Apu::osc_output( int index, Blip_Buffer* center, Blip_Buffer* left, Blip_Buffer* right )
-{
-	require( (unsigned) index < osc_count );
-	require( (center && left && right) || (!center && !left && !right) );
-	Gb_Osc& osc = *oscs [index];
-	osc.outputs [1] = right;
-	osc.outputs [2] = left;
-	osc.outputs [3] = center;
-	osc.output = osc.outputs [osc.output_select];
-}
-
-void Gb_Apu::output( Blip_Buffer* center, Blip_Buffer* left, Blip_Buffer* right )
-{
-	for ( int i = 0; i < osc_count; i++ )
-		osc_output( i, center, left, right );
-}
-
-void Gb_Apu::update_volume()
-{
-	// TODO: doesn't handle differing left/right global volume (support would
-	// require modification to all oscillator code)
-	int data = regs [vol_reg - start_addr];
-	double vol = (max( data & 7, data >> 4 & 7 ) + 1) * volume_unit;
-	square_synth.volume( vol );
-	other_synth.volume( vol );
-}
-
-static unsigned char const powerup_regs [0x20] = {
-	0x80,0x3F,0x00,0xFF,0xBF, // square 1
-	0xFF,0x3F,0x00,0xFF,0xBF, // square 2
-	0x7F,0xFF,0x9F,0xFF,0xBF, // wave
-	0xFF,0xFF,0x00,0x00,0xBF, // noise
-	0x00, // left/right enables
-	0x77, // master volume
-	0x80, // power
-	0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF
-};
-
-void Gb_Apu::set_tempo( double t )
-{
-	frame_period = 4194304 / 256; // 256 Hz
-	if ( t != 1.0 )
-		frame_period = blip_time_t (frame_period / t);
-}
-
-void Gb_Apu::reset()
-{
-	next_frame_time = 0;
-	last_time       = 0;
-	frame_count     = 0;
-	
-	square1.reset();
-	square2.reset();
-	wave.reset();
-	noise.reset();
-	noise.bits = 1;
-	wave.wave_pos = 0;
-	
-	// avoid click at beginning
-	regs [vol_reg - start_addr] = 0x77;
-	update_volume();
-	
-	regs [status_reg - start_addr] = 0x01; // force power
-	write_register( 0, status_reg, 0x00 );
-	
-	static unsigned char const initial_wave [] = {
-		0x84,0x40,0x43,0xAA,0x2D,0x78,0x92,0x3C, // wave table
-		0x60,0x59,0x59,0xB0,0x34,0xB8,0x2E,0xDA
-	};
-	memcpy( wave.wave, initial_wave, sizeof wave.wave );
-}
-
-void Gb_Apu::run_until( blip_time_t end_time )
-{
-	require( end_time >= last_time ); // end_time must not be before previous time
-	if ( end_time == last_time )
-		return;
-	
-	while ( true )
-	{
-		blip_time_t time = next_frame_time;
-		if ( time > end_time )
-			time = end_time;
-		
-		// run oscillators
-		for ( int i = 0; i < osc_count; ++i )
-		{
-			Gb_Osc& osc = *oscs [i];
-			if ( osc.output )
-			{
-				osc.output->set_modified(); // TODO: misses optimization opportunities?
-				int playing = false;
-				if ( osc.enabled && osc.volume &&
-						(!(osc.regs [4] & osc.len_enabled_mask) || osc.length) )
-					playing = -1;
-				switch ( i )
-				{
-				case 0: square1.run( last_time, time, playing ); break;
-				case 1: square2.run( last_time, time, playing ); break;
-				case 2: wave   .run( last_time, time, playing ); break;
-				case 3: noise  .run( last_time, time, playing ); break;
-				}
-			}
-		}
-		last_time = time;
-		
-		if ( time == end_time )
-			break;
-		
-		next_frame_time += frame_period;
-		
-		// 256 Hz actions
-		square1.clock_length();
-		square2.clock_length();
-		wave.clock_length();
-		noise.clock_length();
-		
-		frame_count = (frame_count + 1) & 3;
-		if ( frame_count == 0 )
-		{
-			// 64 Hz actions
-			square1.clock_envelope();
-			square2.clock_envelope();
-			noise.clock_envelope();
-		}
-		
-		if ( frame_count & 1 )
-			square1.clock_sweep(); // 128 Hz action
-	}
-}
-
-void Gb_Apu::end_frame( blip_time_t end_time )
-{
-	if ( end_time > last_time )
-		run_until( end_time );
-	
-	assert( next_frame_time >= end_time );
-	next_frame_time -= end_time;
-	
-	assert( last_time >= end_time );
-	last_time -= end_time;
-}
-
-void Gb_Apu::write_register( blip_time_t time, unsigned addr, int data )
-{
-	require( (unsigned) data < 0x100 );
-	
-	int reg = addr - start_addr;
-	if ( (unsigned) reg >= register_count )
-		return;
-	
-	run_until( time );
-	
-	int old_reg = regs [reg];
-	regs [reg] = data;
-	
-	if ( addr < vol_reg )
-	{
-		write_osc( reg / 5, reg, data );
-	}
-	else if ( addr == vol_reg && data != old_reg ) // global volume
-	{
-		// return all oscs to 0
-		for ( int i = 0; i < osc_count; i++ )
-		{
-			Gb_Osc& osc = *oscs [i];
-			int amp = osc.last_amp;
-			osc.last_amp = 0;
-			if ( amp && osc.enabled && osc.output )
-				other_synth.offset( time, -amp, osc.output );
-		}
-		
-		if ( wave.outputs [3] )
-			other_synth.offset( time, 30, wave.outputs [3] );
-		
-		update_volume();
-		
-		if ( wave.outputs [3] )
-			other_synth.offset( time, -30, wave.outputs [3] );
-		
-		// oscs will update with new amplitude when next run
-	}
-	else if ( addr == 0xFF25 || addr == status_reg )
-	{
-		int mask = (regs [status_reg - start_addr] & 0x80) ? ~0 : 0;
-		int flags = regs [0xFF25 - start_addr] & mask;
-		
-		// left/right assignments
-		for ( int i = 0; i < osc_count; i++ )
-		{
-			Gb_Osc& osc = *oscs [i];
-			osc.enabled &= mask;
-			int bits = flags >> i;
-			Blip_Buffer* old_output = osc.output;
-			osc.output_select = (bits >> 3 & 2) | (bits & 1);
-			osc.output = osc.outputs [osc.output_select];
-			if ( osc.output != old_output )
-			{
-				int amp = osc.last_amp;
-				osc.last_amp = 0;
-				if ( amp && old_output )
-					other_synth.offset( time, -amp, old_output );
-			}
-		}
-		
-		if ( addr == status_reg && data != old_reg )
-		{
-			if ( !(data & 0x80) )
-			{
-				for ( unsigned i = 0; i < sizeof powerup_regs; i++ )
-				{
-					if ( i != status_reg - start_addr )
-						write_register( time, i + start_addr, powerup_regs [i] );
-				}
-			}
-			else
-			{
-				//debug_printf( "APU powered on\n" );
-			}
-		}
-	}
-	else if ( addr >= 0xFF30 )
-	{
-		int index = (addr & 0x0F) * 2;
-		wave.wave [index] = data >> 4;
-		wave.wave [index + 1] = data & 0x0F;
-	}
-}
-
-int Gb_Apu::read_register( blip_time_t time, unsigned addr )
-{
-	run_until( time );
-	
-	int index = addr - start_addr;
-	require( (unsigned) index < register_count );
-	int data = regs [index];
-	
-	if ( addr == status_reg )
-	{
-		data = (data & 0x80) | 0x70;
-		for ( int i = 0; i < osc_count; i++ )
-		{
-			const Gb_Osc& osc = *oscs [i];
-			if ( osc.enabled && (osc.length || !(osc.regs [4] & osc.len_enabled_mask)) )
-				data |= 1 << i;
-		}
-	}
-	
-	return data;
-}