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Cleanup and algebraic reduction

This commit is contained in:
Jack Andersen 2016-05-07 19:33:34 -10:00
parent 7aad87ea8c
commit d72e193715
1 changed files with 18 additions and 26 deletions
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44
lib/EffectChorus.cpp
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@ -17,43 +17,35 @@ EffectChorus::EffectChorus(uint32_t baseDelay, uint32_t variation,
memset(buf, 0, m_blockSamples * AMUSE_CHORUS_NUM_BLOCKS * 8 * sizeof(int32_t));
size_t chanPitch = m_blockSamples * AMUSE_CHORUS_NUM_BLOCKS;
x0_lastLeft[0] = buf;
x0_lastLeft[1] = x0_lastLeft[0] + m_blockSamples;
x0_lastLeft[2] = x0_lastLeft[0] + m_blockSamples * 2;
for (int i=0 ; i<AMUSE_CHORUS_NUM_BLOCKS ; ++i)
x0_lastLeft[i] = buf + m_blockSamples * i;
xc_lastRight[0] = buf + chanPitch;
xc_lastRight[1] = xc_lastRight[0] + m_blockSamples;
xc_lastRight[2] = xc_lastRight[0] + m_blockSamples * 2;
for (int i=0 ; i<AMUSE_CHORUS_NUM_BLOCKS ; ++i)
xc_lastRight[i] = buf + chanPitch + m_blockSamples * i;
x18_lastRearLeft[0] = buf + chanPitch * 2;
x18_lastRearLeft[1] = x18_lastRearLeft[0] + m_blockSamples;
x18_lastRearLeft[2] = x18_lastRearLeft[0] + m_blockSamples * 2;
for (int i=0 ; i<AMUSE_CHORUS_NUM_BLOCKS ; ++i)
x18_lastRearLeft[i] = buf + chanPitch * 2 + m_blockSamples * i;
x18_lastRearRight[0] = buf + chanPitch * 3;
x18_lastRearRight[1] = x18_lastRearRight[0] + m_blockSamples;
x18_lastRearRight[2] = x18_lastRearRight[0] + m_blockSamples * 2;
for (int i=0 ; i<AMUSE_CHORUS_NUM_BLOCKS ; ++i)
x18_lastRearRight[i] = buf + chanPitch * 3 + m_blockSamples * i;
x18_lastCenter[0] = buf + chanPitch * 4;
x18_lastCenter[1] = x18_lastCenter[0] + m_blockSamples;
x18_lastCenter[2] = x18_lastCenter[0] + m_blockSamples * 2;
for (int i=0 ; i<AMUSE_CHORUS_NUM_BLOCKS ; ++i)
x18_lastCenter[i] = buf + chanPitch * 4 + m_blockSamples * i;
x18_lastLFE[0] = buf + chanPitch * 5;
x18_lastLFE[1] = x18_lastLFE[0] + m_blockSamples;
x18_lastLFE[2] = x18_lastLFE[0] + m_blockSamples * 2;
for (int i=0 ; i<AMUSE_CHORUS_NUM_BLOCKS ; ++i)
x18_lastLFE[i] = buf + chanPitch * 5 + m_blockSamples * i;
x18_lastSideLeft[0] = buf + chanPitch * 6;
x18_lastSideLeft[1] = x18_lastSideLeft[0] + m_blockSamples;
x18_lastSideLeft[2] = x18_lastSideLeft[0] + m_blockSamples * 2;
for (int i=0 ; i<AMUSE_CHORUS_NUM_BLOCKS ; ++i)
x18_lastSideLeft[i] = buf + chanPitch * 6 + m_blockSamples * i;
x18_lastSideRight[0] = buf + chanPitch * 7;
x18_lastSideRight[1] = x18_lastSideRight[0] + m_blockSamples;
x18_lastSideRight[2] = x18_lastSideRight[0] + m_blockSamples * 2;
for (int i=0 ; i<AMUSE_CHORUS_NUM_BLOCKS ; ++i)
x18_lastSideRight[i] = buf + chanPitch * 7 + m_blockSamples * i;
x6c_src.x88_trigger = chanPitch;
x5c_currentPosHi = m_blockSamples * 2 - ((x90_baseDelay - 5) * m_sampleRate / 1000.f);
x5c_currentPosHi = m_blockSamples * 2 - ((x90_baseDelay - 5) * (m_sampleRate / 1000.0));
uint32_t temp = (x5c_currentPosHi + (x24_currentLast - 1) * m_blockSamples);
x5c_currentPosHi = temp - ((temp * 8 / 15) >> 8) * chanPitch;
x5c_currentPosHi = temp - int32_t(temp * 15 / (m_sampleRate / 1000.0)) * chanPitch;
x68_pitchOffsetPeriod = (x98_period * 2 / 10 + 1) & ~1;
x60_pitchOffset = x94_variation * 2048 / x68_pitchOffsetPeriod;