636 lines
31 KiB
C++
636 lines
31 KiB
C++
//////////////////////////////////////////////////////////////////////////
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// //
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// NES APU core //
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// Norix //
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// written 2002/06/27 //
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// last modify ----/--/-- //
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//////////////////////////////////////////////////////////////////////////
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#include "DebugOut.h"
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#include "App.h"
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#include "Config.h"
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#include "nes.h"
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#include "mmu.h"
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#include "cpu.h"
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#include "ppu.h"
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#include "rom.h"
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#include "apu.h"
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// Volume adjust
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// Internal sounds
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#define RECTANGLE_VOL (0x0F0)
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#define TRIANGLE_VOL (0x130)
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#define NOISE_VOL (0x0C0)
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#define DPCM_VOL (0x0F0)
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// Extra sounds
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#define VRC6_VOL (0x0F0)
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#define VRC7_VOL (0x130)
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#define FDS_VOL (0x0F0)
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#define MMC5_VOL (0x0F0)
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#define N106_VOL (0x088)
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#define FME7_VOL (0x130)
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APU::APU( NES* parent )
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{
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exsound_select = 0;
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nes = parent;
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internal.SetParent( parent );
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last_data = last_diff = 0;
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ZEROMEMORY( m_SoundBuffer, sizeof(m_SoundBuffer) );
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ZEROMEMORY( lowpass_filter, sizeof(lowpass_filter) );
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ZEROMEMORY( &queue, sizeof(queue) );
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ZEROMEMORY( &exqueue, sizeof(exqueue) );
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for( INT i = 0; i < 16; i++ ) {
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m_bMute[i] = TRUE;
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}
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}
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APU::~APU()
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{
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}
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void APU::SetQueue( INT writetime, WORD addr, BYTE data )
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{
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queue.data[queue.wrptr].time = writetime;
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queue.data[queue.wrptr].addr = addr;
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queue.data[queue.wrptr].data = data;
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queue.wrptr++;
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queue.wrptr&=QUEUE_LENGTH-1;
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if( queue.wrptr == queue.rdptr ) {
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DEBUGOUT( "queue overflow.\n" );
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}
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}
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BOOL APU::GetQueue( INT writetime, QUEUEDATA& ret )
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{
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if( queue.wrptr == queue.rdptr ) {
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return FALSE;
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}
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if( queue.data[queue.rdptr].time <= writetime ) {
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ret = queue.data[queue.rdptr];
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queue.rdptr++;
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queue.rdptr&=QUEUE_LENGTH-1;
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return TRUE;
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}
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return FALSE;
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}
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void APU::SetExQueue( INT writetime, WORD addr, BYTE data )
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{
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exqueue.data[exqueue.wrptr].time = writetime;
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exqueue.data[exqueue.wrptr].addr = addr;
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exqueue.data[exqueue.wrptr].data = data;
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exqueue.wrptr++;
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exqueue.wrptr&=QUEUE_LENGTH-1;
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if( exqueue.wrptr == exqueue.rdptr ) {
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DEBUGOUT( "exqueue overflow.\n" );
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}
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}
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BOOL APU::GetExQueue( INT writetime, QUEUEDATA& ret )
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{
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if( exqueue.wrptr == exqueue.rdptr ) {
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return FALSE;
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}
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if( exqueue.data[exqueue.rdptr].time <= writetime ) {
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ret = exqueue.data[exqueue.rdptr];
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exqueue.rdptr++;
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exqueue.rdptr&=QUEUE_LENGTH-1;
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return TRUE;
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}
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return FALSE;
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}
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void APU::QueueClear()
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{
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ZEROMEMORY( &queue, sizeof(queue) );
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ZEROMEMORY( &exqueue, sizeof(exqueue) );
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}
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void APU::QueueFlush()
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{
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while( queue.wrptr != queue.rdptr ) {
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WriteProcess( queue.data[queue.rdptr].addr, queue.data[queue.rdptr].data );
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queue.rdptr++;
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queue.rdptr&=QUEUE_LENGTH-1;
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}
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while( exqueue.wrptr != exqueue.rdptr ) {
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WriteExProcess( exqueue.data[exqueue.rdptr].addr, exqueue.data[exqueue.rdptr].data );
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exqueue.rdptr++;
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exqueue.rdptr&=QUEUE_LENGTH-1;
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}
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}
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void APU::SoundSetup()
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{
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FLOAT fClock = nes->nescfg->CpuClock;
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INT nRate = (INT)Config.sound.nRate;
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internal.Setup( fClock, nRate );
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vrc6.Setup( fClock, nRate );
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vrc7.Setup( fClock, nRate );
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mmc5.Setup( fClock, nRate );
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fds.Setup ( fClock, nRate );
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n106.Setup( fClock, nRate );
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fme7.Setup( fClock, nRate );
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}
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void APU::Reset()
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{
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ZEROMEMORY( &queue, sizeof(queue) );
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ZEROMEMORY( &exqueue, sizeof(exqueue) );
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elapsed_time = 0;
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FLOAT fClock = nes->nescfg->CpuClock;
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INT nRate = (INT)Config.sound.nRate;
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internal.Reset( fClock, nRate );
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vrc6.Reset( fClock, nRate );
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vrc7.Reset( fClock, nRate );
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mmc5.Reset( fClock, nRate );
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fds.Reset ( fClock, nRate );
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n106.Reset( fClock, nRate );
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fme7.Reset( fClock, nRate );
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SoundSetup();
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}
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void APU::SelectExSound( BYTE data )
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{
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exsound_select = data;
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}
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BYTE APU::Read( WORD addr )
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{
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return internal.SyncRead( addr );
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}
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void APU::Write( WORD addr, BYTE data )
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{
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// $4018はVirtuaNES固有ポート
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if( addr >= 0x4000 && addr <= 0x401F ) {
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internal.SyncWrite( addr, data );
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SetQueue( nes->cpu->GetTotalCycles(), addr, data );
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}
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}
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BYTE APU::ExRead( WORD addr )
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{
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BYTE data = 0;
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if( exsound_select & 0x10 ) {
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if( addr == 0x4800 ) {
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SetExQueue( nes->cpu->GetTotalCycles(), 0, 0 );
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}
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}
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if( exsound_select & 0x04 ) {
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if( addr >= 0x4040 && addr < 0x4100 ) {
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data = fds.SyncRead( addr );
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}
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}
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if( exsound_select & 0x08 ) {
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if( addr >= 0x5000 && addr <= 0x5015 ) {
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data = mmc5.SyncRead( addr );
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}
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}
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return data;
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}
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void APU::ExWrite( WORD addr, BYTE data )
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{
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SetExQueue( nes->cpu->GetTotalCycles(), addr, data );
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if( exsound_select & 0x04 ) {
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if( addr >= 0x4040 && addr < 0x4100 ) {
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fds.SyncWrite( addr, data );
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}
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}
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if( exsound_select & 0x08 ) {
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if( addr >= 0x5000 && addr <= 0x5015 ) {
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mmc5.SyncWrite( addr, data );
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}
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}
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}
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void APU::Sync()
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{
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}
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void APU::SyncDPCM( INT cycles )
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{
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internal.Sync( cycles );
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if( exsound_select & 0x04 ) {
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fds.Sync( cycles );
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}
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if( exsound_select & 0x08 ) {
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mmc5.Sync( cycles );
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}
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}
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void APU::WriteProcess( WORD addr, BYTE data )
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{
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// $4018はVirtuaNES固有ポート
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if( addr >= 0x4000 && addr <= 0x401F ) {
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internal.Write( addr, data );
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}
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}
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void APU::WriteExProcess( WORD addr, BYTE data )
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{
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if( exsound_select & 0x01 ) {
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vrc6.Write( addr, data );
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}
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if( exsound_select & 0x02 ) {
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vrc7.Write( addr, data );
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}
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if( exsound_select & 0x04 ) {
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fds.Write( addr, data );
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}
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if( exsound_select & 0x08 ) {
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mmc5.Write( addr, data );
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}
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if( exsound_select & 0x10 ) {
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if( addr == 0x0000 ) {
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BYTE dummy = n106.Read( addr );
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} else {
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n106.Write( addr, data );
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}
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}
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if( exsound_select & 0x20 ) {
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fme7.Write( addr, data );
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}
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}
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void APU::Process( LPBYTE lpBuffer, DWORD dwSize )
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{
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INT nBits = Config.sound.nBits;
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DWORD dwLength = dwSize / (nBits/8);
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INT output;
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QUEUEDATA q;
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DWORD writetime;
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LPSHORT pSoundBuf = m_SoundBuffer;
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INT nCcount = 0;
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INT nFilterType = Config.sound.nFilterType;
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if( !Config.sound.bEnable ) {
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::FillMemory( lpBuffer, dwSize, (BYTE)(Config.sound.nRate==8?128:0) );
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return;
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}
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// Volume setup
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// 0:Master
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// 1:Rectangle 1
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// 2:Rectangle 2
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// 3:Triangle
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// 4:Noise
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// 5:DPCM
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// 6:VRC6
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// 7:VRC7
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// 8:FDS
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// 9:MMC5
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// 10:N106
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// 11:FME7
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INT vol[24];
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BOOL* bMute = m_bMute;
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SHORT* nVolume = Config.sound.nVolume;
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INT nMasterVolume = bMute[0]?nVolume[0]:0;
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// Internal
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vol[ 0] = bMute[1]?(RECTANGLE_VOL*nVolume[1]*nMasterVolume)/(100*100):0;
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vol[ 1] = bMute[2]?(RECTANGLE_VOL*nVolume[2]*nMasterVolume)/(100*100):0;
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vol[ 2] = bMute[3]?(TRIANGLE_VOL *nVolume[3]*nMasterVolume)/(100*100):0;
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vol[ 3] = bMute[4]?(NOISE_VOL *nVolume[4]*nMasterVolume)/(100*100):0;
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vol[ 4] = bMute[5]?(DPCM_VOL *nVolume[5]*nMasterVolume)/(100*100):0;
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// VRC6
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vol[ 5] = bMute[6]?(VRC6_VOL*nVolume[6]*nMasterVolume)/(100*100):0;
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vol[ 6] = bMute[7]?(VRC6_VOL*nVolume[6]*nMasterVolume)/(100*100):0;
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vol[ 7] = bMute[8]?(VRC6_VOL*nVolume[6]*nMasterVolume)/(100*100):0;
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// VRC7
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vol[ 8] = bMute[6]?(VRC7_VOL*nVolume[7]*nMasterVolume)/(100*100):0;
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// FDS
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vol[ 9] = bMute[6]?(FDS_VOL*nVolume[8]*nMasterVolume)/(100*100):0;
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// MMC5
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vol[10] = bMute[6]?(MMC5_VOL*nVolume[9]*nMasterVolume)/(100*100):0;
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vol[11] = bMute[7]?(MMC5_VOL*nVolume[9]*nMasterVolume)/(100*100):0;
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vol[12] = bMute[8]?(MMC5_VOL*nVolume[9]*nMasterVolume)/(100*100):0;
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// N106
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vol[13] = bMute[ 6]?(N106_VOL*nVolume[10]*nMasterVolume)/(100*100):0;
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vol[14] = bMute[ 7]?(N106_VOL*nVolume[10]*nMasterVolume)/(100*100):0;
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vol[15] = bMute[ 8]?(N106_VOL*nVolume[10]*nMasterVolume)/(100*100):0;
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vol[16] = bMute[ 9]?(N106_VOL*nVolume[10]*nMasterVolume)/(100*100):0;
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vol[17] = bMute[10]?(N106_VOL*nVolume[10]*nMasterVolume)/(100*100):0;
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vol[18] = bMute[11]?(N106_VOL*nVolume[10]*nMasterVolume)/(100*100):0;
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vol[19] = bMute[12]?(N106_VOL*nVolume[10]*nMasterVolume)/(100*100):0;
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vol[20] = bMute[13]?(N106_VOL*nVolume[10]*nMasterVolume)/(100*100):0;
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// FME7
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vol[21] = bMute[6]?(FME7_VOL*nVolume[11]*nMasterVolume)/(100*100):0;
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vol[22] = bMute[7]?(FME7_VOL*nVolume[11]*nMasterVolume)/(100*100):0;
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vol[23] = bMute[8]?(FME7_VOL*nVolume[11]*nMasterVolume)/(100*100):0;
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// double cycle_rate = ((double)FRAME_CYCLES*60.0/12.0)/(double)Config.sound.nRate;
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double cycle_rate = ((double)nes->nescfg->FrameCycles*60.0/12.0)/(double)Config.sound.nRate;
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// CPUサイクル数がループしてしまった時の対策処理
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if( elapsed_time > nes->cpu->GetTotalCycles() ) {
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QueueFlush();
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}
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while( dwLength-- ) {
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writetime = (DWORD)elapsed_time;
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while( GetQueue( writetime, q ) ) {
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WriteProcess( q.addr, q.data );
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}
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while( GetExQueue( writetime, q ) ) {
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WriteExProcess( q.addr, q.data );
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}
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// 0-4:internal 5-7:VRC6 8:VRC7 9:FDS 10-12:MMC5 13-20:N106 21-23:FME7
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output = 0;
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output += internal.Process( 0 )*vol[0];
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output += internal.Process( 1 )*vol[1];
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output += internal.Process( 2 )*vol[2];
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output += internal.Process( 3 )*vol[3];
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output += internal.Process( 4 )*vol[4];
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if( exsound_select & 0x01 ) {
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output += vrc6.Process( 0 )*vol[5];
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output += vrc6.Process( 1 )*vol[6];
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output += vrc6.Process( 2 )*vol[7];
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}
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if( exsound_select & 0x02 ) {
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output += vrc7.Process( 0 )*vol[8];
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}
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if( exsound_select & 0x04 ) {
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output += fds.Process( 0 )*vol[9];
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}
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if( exsound_select & 0x08 ) {
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output += mmc5.Process( 0 )*vol[10];
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output += mmc5.Process( 1 )*vol[11];
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output += mmc5.Process( 2 )*vol[12];
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}
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if( exsound_select & 0x10 ) {
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output += n106.Process( 0 )*vol[13];
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output += n106.Process( 1 )*vol[14];
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output += n106.Process( 2 )*vol[15];
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output += n106.Process( 3 )*vol[16];
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output += n106.Process( 4 )*vol[17];
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output += n106.Process( 5 )*vol[18];
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output += n106.Process( 6 )*vol[19];
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output += n106.Process( 7 )*vol[20];
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}
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if( exsound_select & 0x20 ) {
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fme7.Process( 3 ); // Envelope & Noise
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output += fme7.Process( 0 )*vol[21];
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output += fme7.Process( 1 )*vol[22];
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output += fme7.Process( 2 )*vol[23];
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}
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output >>= 8;
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if( nFilterType == 1 ) {
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//ローパスフィルターTYPE 1(Simple)
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output = (lowpass_filter[0]+output)/2;
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lowpass_filter[0] = output;
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} else if( nFilterType == 2 ) {
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//ローパスフィルターTYPE 2(Weighted type 1)
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output = (lowpass_filter[1]+lowpass_filter[0]+output)/3;
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lowpass_filter[1] = lowpass_filter[0];
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lowpass_filter[0] = output;
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} else if( nFilterType == 3 ) {
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//ローパスフィルターTYPE 3(Weighted type 2)
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output = (lowpass_filter[2]+lowpass_filter[1]+lowpass_filter[0]+output)/4;
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lowpass_filter[2] = lowpass_filter[1];
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lowpass_filter[1] = lowpass_filter[0];
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lowpass_filter[0] = output;
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} else if( nFilterType == 4 ) {
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//ローパスフィルターTYPE 4(Weighted type 3)
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output = (lowpass_filter[1]+lowpass_filter[0]*2+output)/4;
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lowpass_filter[1] = lowpass_filter[0];
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lowpass_filter[0] = output;
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}
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#if 0
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// DC成分のカット
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{
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static double ave = 0.0, max=0.0, min=0.0;
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double delta;
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delta = (max-min)/32768.0;
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max -= delta;
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min += delta;
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if( output > max ) max = output;
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if( output < min ) min = output;
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ave -= ave/1024.0;
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ave += (max+min)/2048.0;
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output -= (INT)ave;
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}
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#endif
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#if 1
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// DC成分のカット(HPF TEST)
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{
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// static double cutoff = (2.0*3.141592653579*40.0/44100.0);
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static double cutofftemp = (2.0*3.141592653579*40.0);
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double cutoff = cutofftemp/(double)Config.sound.nRate;
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static double tmp = 0.0;
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double in, out;
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in = (double)output;
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out = (in - tmp);
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tmp = tmp + cutoff * out;
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output = (INT)out;
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}
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#endif
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#if 0
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// スパイクノイズの除去(AGC TEST)
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{
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INT diff = abs(output-last_data);
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if( diff > 0x4000 ) {
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output /= 4;
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} else
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if( diff > 0x3000 ) {
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output /= 3;
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} else
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if( diff > 0x2000 ) {
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output /= 2;
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}
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last_data = output;
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}
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#endif
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// Limit
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if( output > 0x7FFF ) {
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output = 0x7FFF;
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} else if( output < -0x8000 ) {
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output = -0x8000;
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}
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if( nBits != 8 ) {
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*(SHORT*)lpBuffer = (SHORT)output;
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lpBuffer += sizeof(SHORT);
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} else {
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*lpBuffer++ = (output>>8)^0x80;
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}
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if( nCcount < 0x0100 )
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pSoundBuf[nCcount++] = (SHORT)output;
|
||
|
||
// elapsedtime += cycle_rate;
|
||
elapsed_time += cycle_rate;
|
||
}
|
||
|
||
#if 1
|
||
if( elapsed_time > ((nes->nescfg->FrameCycles/24)+nes->cpu->GetTotalCycles()) ) {
|
||
elapsed_time = nes->cpu->GetTotalCycles();
|
||
}
|
||
if( (elapsed_time+(nes->nescfg->FrameCycles/6)) < nes->cpu->GetTotalCycles() ) {
|
||
elapsed_time = nes->cpu->GetTotalCycles();
|
||
}
|
||
#else
|
||
elapsed_time = nes->cpu->GetTotalCycles();
|
||
#endif
|
||
}
|
||
|
||
// チャンネルの周波数取得サブルーチン(NSF用)
|
||
INT APU::GetChannelFrequency( INT no )
|
||
{
|
||
if( !m_bMute[0] )
|
||
return 0;
|
||
|
||
// Internal
|
||
if( no < 5 ) {
|
||
return m_bMute[no+1]?internal.GetFreq( no ):0;
|
||
}
|
||
// VRC6
|
||
if( (exsound_select & 0x01) && no >= 0x0100 && no < 0x0103 ) {
|
||
return m_bMute[6+(no&0x03)]?vrc6.GetFreq( no & 0x03 ):0;
|
||
}
|
||
// FDS
|
||
if( (exsound_select & 0x04) && no == 0x300 ) {
|
||
return m_bMute[6]?fds.GetFreq( 0 ):0;
|
||
}
|
||
// MMC5
|
||
if( (exsound_select & 0x08) && no >= 0x0400 && no < 0x0402 ) {
|
||
return m_bMute[6+(no&0x03)]?mmc5.GetFreq( no & 0x03 ):0;
|
||
}
|
||
// N106
|
||
if( (exsound_select & 0x10) && no >= 0x0500 && no < 0x0508 ) {
|
||
return m_bMute[6+(no&0x07)]?n106.GetFreq( no & 0x07 ):0;
|
||
}
|
||
// FME7
|
||
if( (exsound_select & 0x20) && no >= 0x0600 && no < 0x0603 ) {
|
||
return m_bMute[6+(no&0x03)]?fme7.GetFreq( no & 0x03 ):0;
|
||
}
|
||
// VRC7
|
||
if( (exsound_select & 0x02) && no >= 0x0700 && no < 0x0709 ) {
|
||
return m_bMute[6]?vrc7.GetFreq(no&0x0F):0;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
// State Save/Load
|
||
void APU::SaveState( LPBYTE p )
|
||
{
|
||
#ifdef _DEBUG
|
||
LPBYTE pold = p;
|
||
#endif
|
||
|
||
// 時間軸を同期させる為Flushする
|
||
QueueFlush();
|
||
|
||
internal.SaveState( p );
|
||
p += (internal.GetStateSize()+15)&(~0x0F); // Padding
|
||
|
||
// VRC6
|
||
if( exsound_select & 0x01 ) {
|
||
vrc6.SaveState( p );
|
||
p += (vrc6.GetStateSize()+15)&(~0x0F); // Padding
|
||
}
|
||
// VRC7 (not support)
|
||
if( exsound_select & 0x02 ) {
|
||
vrc7.SaveState( p );
|
||
p += (vrc7.GetStateSize()+15)&(~0x0F); // Padding
|
||
}
|
||
// FDS
|
||
if( exsound_select & 0x04 ) {
|
||
fds.SaveState( p );
|
||
p += (fds.GetStateSize()+15)&(~0x0F); // Padding
|
||
}
|
||
// MMC5
|
||
if( exsound_select & 0x08 ) {
|
||
mmc5.SaveState( p );
|
||
p += (mmc5.GetStateSize()+15)&(~0x0F); // Padding
|
||
}
|
||
// N106
|
||
if( exsound_select & 0x10 ) {
|
||
n106.SaveState( p );
|
||
p += (n106.GetStateSize()+15)&(~0x0F); // Padding
|
||
}
|
||
// FME7
|
||
if( exsound_select & 0x20 ) {
|
||
fme7.SaveState( p );
|
||
p += (fme7.GetStateSize()+15)&(~0x0F); // Padding
|
||
}
|
||
|
||
#ifdef _DEBUG
|
||
DEBUGOUT( "SAVE APU SIZE:%d\n", p-pold );
|
||
#endif
|
||
}
|
||
|
||
void APU::LoadState( LPBYTE p )
|
||
{
|
||
// 時間軸を同期させる為に消す
|
||
QueueClear();
|
||
|
||
internal.LoadState( p );
|
||
p += (internal.GetStateSize()+15)&(~0x0F); // Padding
|
||
|
||
// VRC6
|
||
if( exsound_select & 0x01 ) {
|
||
vrc6.LoadState( p );
|
||
p += (vrc6.GetStateSize()+15)&(~0x0F); // Padding
|
||
}
|
||
// VRC7 (not support)
|
||
if( exsound_select & 0x02 ) {
|
||
vrc7.LoadState( p );
|
||
p += (vrc7.GetStateSize()+15)&(~0x0F); // Padding
|
||
}
|
||
// FDS
|
||
if( exsound_select & 0x04 ) {
|
||
fds.LoadState( p );
|
||
p += (fds.GetStateSize()+15)&(~0x0F); // Padding
|
||
}
|
||
// MMC5
|
||
if( exsound_select & 0x08 ) {
|
||
mmc5.LoadState( p );
|
||
p += (mmc5.GetStateSize()+15)&(~0x0F); // Padding
|
||
}
|
||
// N106
|
||
if( exsound_select & 0x10 ) {
|
||
n106.LoadState( p );
|
||
p += (n106.GetStateSize()+15)&(~0x0F); // Padding
|
||
}
|
||
// FME7
|
||
if( exsound_select & 0x20 ) {
|
||
fme7.LoadState( p );
|
||
p += (fme7.GetStateSize()+15)&(~0x0F); // Padding
|
||
}
|
||
}
|