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Fixed Audio Timing Improvements 

* A user-defined FAT value of 0 will cause it to calculate
* The second buffer shouldn't be part of the GetLegth returned value
* Rounded the GetLength values up and aligned to 4 bytes (sample size)
* Implemented ai_busy and changed the behavior of ai_full
* Changed the second buffer behavior
This commit is contained in:
Azimer 2015-05-02 01:37:23 -05:00
parent 6693cb6a2a
commit c970681595
1 changed files with 25 additions and 24 deletions
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49
Source/Project64/N64 System/Mips/Audio.cpp
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@ -26,6 +26,7 @@ void CAudio::Reset ( void )
m_Status = 0;
m_BytesPerSecond = 0;
m_CountsPerByte = g_System->AiCountPerBytes(); // should be calculated ... see below, instead allow from user settings
if (m_CountsPerByte == 0) m_CountsPerByte = 500; // If the user has no defined value, grant a default and we will calculate
m_FramesPerSecond = 60;
}
@ -35,10 +36,10 @@ DWORD CAudio::GetLength ( void )
DWORD TimeLeft = g_SystemTimer->GetTimer(CSystemTimer::AiTimerInterrupt), Res = 0;
if (TimeLeft > 0)
{
Res = (TimeLeft / m_CountsPerByte) + m_SecondBuff;
Res = (TimeLeft / m_CountsPerByte);
}
WriteTraceF(TraceAudio,__FUNCTION__ ": Done (res = %d, TimeLeft = %d)",Res, TimeLeft);
return Res;
return (Res+3)&~3;
}
DWORD CAudio::GetStatus ( void )
@ -56,21 +57,22 @@ void CAudio::LenChanged ( void )
{
WriteTraceF(TraceAudio,__FUNCTION__ ": *** Ignoring Write, To Large (%X)",g_Reg->AI_LEN_REG);
} else {
m_Status |= ai_full;
m_Status |= ai_busy;
DWORD AudioLeft = g_SystemTimer->GetTimer(CSystemTimer::AiTimerInterrupt);
if (AudioLeft == 0)
if (AudioLeft == 0 && m_SecondBuff == 0)
{
if (m_SecondBuff)
{
g_Notify->BreakPoint(__FILEW__,__LINE__);
}
WriteTraceF(TraceAudio,__FUNCTION__ ": Set Timer AI_LEN_REG: %d m_CountsPerByte: %d",g_Reg->AI_LEN_REG,m_CountsPerByte);
g_SystemTimer->SetTimer(CSystemTimer::AiTimerInterrupt,g_Reg->AI_LEN_REG * m_CountsPerByte,false);
}
else
else if (m_SecondBuff == 0)
{
WriteTraceF(TraceAudio,__FUNCTION__ ": Increasing Second Buffer (m_SecondBuff %d Increase: %d)",m_SecondBuff,g_Reg->AI_LEN_REG);
m_SecondBuff += g_Reg->AI_LEN_REG;
m_Status |= ai_full;
}
else
{
g_Notify->BreakPoint(__FILEW__, __LINE__);
}
}
}
@ -93,20 +95,21 @@ void CAudio::LenChanged ( void )
void CAudio::InterruptTimerDone ( void )
{
WriteTraceF(TraceAudio,__FUNCTION__ ": Start (m_SecondBuff = %d)",m_SecondBuff);
if (m_SecondBuff != 0)
m_Status &= ~ai_full;
g_Reg->MI_INTR_REG |= MI_INTR_AI;
g_Reg->CheckInterrupts();
if (m_SecondBuff != 0)
{
g_SystemTimer->SetTimer(CSystemTimer::AiTimerInterrupt,m_SecondBuff * m_CountsPerByte,false);
m_SecondBuff = 0;
}
else
{
if (g_Reg->m_AudioIntrReg == 0)
{
g_System->SyncToAudio();
}
g_Reg->MI_INTR_REG |= MI_INTR_AI;
g_Reg->CheckInterrupts();
m_Status &= ~ai_full;
m_Status &= ~ai_busy;
}
if (g_Reg->m_AudioIntrReg == 0)
{
g_System->SyncToAudio();
}
WriteTrace(TraceAudio,__FUNCTION__ ": Done");
}
@ -118,15 +121,13 @@ void CAudio::BusyTimerDone ( void )
m_Status &= ~ai_busy;
}
void CAudio::SetViIntr ( DWORD /*VI_INTR_TIME*/ )
void CAudio::SetViIntr ( DWORD VI_INTR_TIME )
{
/*
double CountsPerSecond = (DWORD)((double)VI_INTR_TIME * m_FramesPerSecond);
if (m_BytesPerSecond != 0)
if (m_BytesPerSecond != 0 && (g_System->AiCountPerBytes() == 0))
{
//m_CountsPerByte = (double)CountsPerSecond / (double)m_BytesPerSecond;
m_CountsPerByte = (int)((double)CountsPerSecond / (double)m_BytesPerSecond);
}
*/
}
@ -144,8 +145,8 @@ void CAudio::SetFrequency (DWORD Dacrate, DWORD System)
//nBlockAlign = 16 / 8 * 2;
m_BytesPerSecond = Frequency * 4;
m_BytesPerSecond = 194532;
m_BytesPerSecond = 128024;
//m_BytesPerSecond = 194532;
//m_BytesPerSecond = 128024;
m_FramesPerSecond = System == SYSTEM_PAL ? 50 : 60;
}