145 lines
4.5 KiB
C++
145 lines
4.5 KiB
C++
/****************************************************************************
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* *
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* Project 64 - A Nintendo 64 emulator. *
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* http://www.pj64-emu.com/ *
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* Copyright (C) 2012 Project64. All rights reserved. *
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* *
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* License: *
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* GNU/GPLv2 http://www.gnu.org/licenses/gpl-2.0.html *
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* *
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****************************************************************************/
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#include "stdafx.h"
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CAudio::CAudio (void)
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{
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Reset();
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}
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CAudio::~CAudio (void)
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{
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}
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void CAudio::Reset ( void )
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{
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m_SecondBuff = 0;
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m_Status = 0;
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m_BytesPerSecond = 0;
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m_CountsPerByte = g_System->AiCountPerBytes(); // should be calculated ... see below, instead allow from user settings
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m_FramesPerSecond = 60;
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}
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DWORD CAudio::GetLength ( void )
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{
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WriteTraceF(TraceAudio,__FUNCTION__ ": Start (m_SecondBuff = %d)",m_SecondBuff);
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DWORD TimeLeft = g_SystemTimer->GetTimer(CSystemTimer::AiTimerInterrupt), Res = 0;
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if (TimeLeft > 0)
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{
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Res = (TimeLeft / m_CountsPerByte) + m_SecondBuff;
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}
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WriteTraceF(TraceAudio,__FUNCTION__ ": Done (res = %d, TimeLeft = %d)",Res, TimeLeft);
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return Res;
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}
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DWORD CAudio::GetStatus ( void )
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{
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WriteTraceF(TraceAudio,__FUNCTION__ ": m_Status = %X",m_Status);
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return m_Status;
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}
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void CAudio::LenChanged ( void )
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{
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WriteTraceF(TraceAudio,__FUNCTION__ ": Start (g_Reg->AI_LEN_REG = %d)",g_Reg->AI_LEN_REG);
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if (g_Reg->AI_LEN_REG != 0)
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{
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if (g_Reg->AI_LEN_REG >= 0x40000)
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{
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WriteTraceF(TraceAudio,__FUNCTION__ ": *** Ignoring Write, To Large (%X)",g_Reg->AI_LEN_REG);
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} else {
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m_Status |= ai_full;
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DWORD AudioLeft = g_SystemTimer->GetTimer(CSystemTimer::AiTimerInterrupt);
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if (AudioLeft == 0)
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{
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if (m_SecondBuff)
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{
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g_Notify->BreakPoint(__FILEW__,__LINE__);
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}
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WriteTraceF(TraceAudio,__FUNCTION__ ": Set Timer AI_LEN_REG: %d m_CountsPerByte: %d",g_Reg->AI_LEN_REG,m_CountsPerByte);
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g_SystemTimer->SetTimer(CSystemTimer::AiTimerInterrupt,g_Reg->AI_LEN_REG * m_CountsPerByte,false);
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} else {
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WriteTraceF(TraceAudio,__FUNCTION__ ": Increasing Second Buffer (m_SecondBuff %d Increase: %d)",m_SecondBuff,g_Reg->AI_LEN_REG);
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m_SecondBuff += g_Reg->AI_LEN_REG;
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}
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}
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} else {
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WriteTraceF(TraceAudio,__FUNCTION__ ": *** Reset Timer to 0");
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g_SystemTimer->StopTimer(CSystemTimer::AiTimerBusy);
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g_SystemTimer->StopTimer(CSystemTimer::AiTimerInterrupt);
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m_SecondBuff = 0;
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m_Status = 0;
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}
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if (g_Plugins->Audio()->AiLenChanged != NULL)
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{
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g_Plugins->Audio()->AiLenChanged();
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}
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WriteTraceF(TraceAudio,__FUNCTION__ ": Done");
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}
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void CAudio::InterruptTimerDone ( void )
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{
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WriteTraceF(TraceAudio,__FUNCTION__ ": Start (m_SecondBuff = %d)",m_SecondBuff);
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if (m_SecondBuff != 0)
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{
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g_SystemTimer->SetTimer(CSystemTimer::AiTimerInterrupt,m_SecondBuff * m_CountsPerByte,false);
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m_SecondBuff = 0;
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} else {
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if (g_Reg->m_AudioIntrReg == 0)
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{
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g_System->SyncToAudio();
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}
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g_Reg->MI_INTR_REG |= MI_INTR_AI;
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g_Reg->CheckInterrupts();
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m_Status &= ~ai_full;
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}
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WriteTrace(TraceAudio,__FUNCTION__ ": Done");
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}
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void CAudio::BusyTimerDone ( void )
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{
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WriteTraceF(TraceAudio,__FUNCTION__ ": Start (m_SecondBuff = %d)",m_SecondBuff);
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g_Notify->BreakPoint(__FILEW__,__LINE__);
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m_Status &= ~ai_busy;
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}
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void CAudio::SetViIntr ( DWORD /*VI_INTR_TIME*/ )
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{
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/*
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double CountsPerSecond = (DWORD)((double)VI_INTR_TIME * m_FramesPerSecond);
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if (m_BytesPerSecond != 0)
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{
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//m_CountsPerByte = (double)CountsPerSecond / (double)m_BytesPerSecond;
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}
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*/
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}
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void CAudio::SetFrequency (DWORD Dacrate, DWORD System)
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{
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WriteTraceF(TraceAudio,__FUNCTION__ "(Dacrate: %X System: %d): AI_BITRATE_REG = %X",Dacrate,System,g_Reg->AI_BITRATE_REG);
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DWORD Frequency;
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switch (System) {
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case SYSTEM_PAL: Frequency = 49656530 / (Dacrate + 1); break;
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case SYSTEM_MPAL: Frequency = 48628316 / (Dacrate + 1); break;
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default: Frequency = 48681812 / (Dacrate + 1); break;
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}
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//nBlockAlign = 16 / 8 * 2;
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m_BytesPerSecond = Frequency * 4;
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m_BytesPerSecond = 194532;
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m_BytesPerSecond = 128024;
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m_FramesPerSecond = System == SYSTEM_PAL ? 50 : 60;
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}
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