110 lines
2.4 KiB
C++
110 lines
2.4 KiB
C++
#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 = 500; // should be calculated ... see below
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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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DWORD TimeLeft = _SystemTimer->GetTimer(CSystemTimer::AiTimer);
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if (TimeLeft > 0)
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{
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return TimeLeft / m_CountsPerByte;
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}
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return 0;
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}
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DWORD CAudio::GetStatus ( void )
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{
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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__ ": _Reg->AI_LEN_REG = %d",_Reg->AI_LEN_REG);
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if (_Reg->AI_LEN_REG != 0)
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{
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DWORD NewLength = GetLength() + _Reg->AI_LEN_REG;
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_SystemTimer->SetTimer(CSystemTimer::AiTimer,NewLength * m_CountsPerByte,false);
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WriteTraceF(TraceAudio,__FUNCTION__ ": NewLength = %d",NewLength);
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/*if (m_CurrentLength == 0) {
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m_CurrentLength = _Reg->AI_LEN_REG;
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} else {
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m_SecondBuff = _Reg->AI_LEN_REG;
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//m_Status |= 0x80000000;
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}*/
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} else {
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_SystemTimer->StopTimer(CSystemTimer::AiTimer);
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m_SecondBuff = 0;
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m_Status = 0;
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}
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if (_Plugins->Audio()->LenChanged != NULL)
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{
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_Plugins->Audio()->LenChanged();
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}
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}
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void CAudio::TimerDone ( void )
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{
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/*_Reg->MI_INTR_REG |= MI_INTR_AI;
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_Reg->CheckInterrupts();
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if (m_SecondBuff != 0) {
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_SystemTimer->SetTimer(CSystemTimer::AiTimer,m_SecondBuff * m_CountsPerByte,false);
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}
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m_CurrentLength = m_SecondBuff;
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m_SecondBuff = 0;
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m_Status &= 0x7FFFFFFF;
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*/
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m_SecondBuff = 0;
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}
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void CAudio::SetViIntr ( DWORD VI_INTR_TIME )
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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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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,_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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if (System == SYSTEM_PAL) {
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m_FramesPerSecond = 50;
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} else {
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m_FramesPerSecond = 60;
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}
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}
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