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SSI263: for amplitude (reg3), now scale the samples and not SetVolume().

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Reason: calling SetVolume() in Play() is too early, and the previous phoneme won't have completed.
Getting the timing right will be difficult, so better to just manipulate the samples as they get written to the playback buffer.
This commit is contained in:
tomcw 2022-06-05 12:10:50 +01:00
parent 1e65528763
commit 80c1150183
1 changed files with 4 additions and 10 deletions
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14
source/SSI263.cpp
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@ -312,15 +312,6 @@ void SSI263::Play(unsigned int nPhoneme)
return;
}
DWORD volume = 0; // 0=max
if (!m_isVotraxPhoneme)
volume = AMPLITUDE_MASK - (m_ctrlArtAmp & AMPLITUDE_MASK); // Invert so that: 0=max, 15=min
SSI263SingleVoice.nVolume = NewVolume(volume*volume, AMPLITUDE_MASK*AMPLITUDE_MASK); // logarithmic, but amplitude<8 can't be heard
HRESULT hr = SSI263SingleVoice.lpDSBvoice->SetVolume(SSI263SingleVoice.nVolume);
if (hr != S_OK)
LogFileOutput("SSI263::Play: SetVolume(%d) res = %08X\n", SSI263SingleVoice.nVolume, hr);
if (m_dbgFirst)
{
m_dbgStartTime = g_nCumulativeCycles;
@ -565,6 +556,8 @@ void SSI263::Update(void)
//-------------
const double amplitude = !m_isVotraxPhoneme ? (double)(m_ctrlArtAmp & AMPLITUDE_MASK) / (double)AMPLITUDE_MASK : 1.0;
bool bSpeechIRQ = false;
{
@ -581,7 +574,8 @@ void SSI263::Update(void)
UINT samplesWritten = 0;
while (samplesWritten < (UINT)nNumSamples)
{
m_currSampleSum += (int)*m_pPhonemeData;
double sample = (double)*m_pPhonemeData * amplitude;
m_currSampleSum += (int)sample;
m_currNumSamples++;
m_pPhonemeData++;