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Merge pull request #4154 from superctr/qsound_181017

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qsoundhle: saturate voice and output accumulators
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MooglyGuy 2018-10-17 16:59:45 +02:00 committed by GitHub
commit 7589694c3c
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1 changed files with 11 additions and 7 deletions
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18
src/devices/sound/qsoundhle.cpp
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@ -532,17 +532,21 @@ void qsound_hle_device::state_normal_update()
{
// Echo is output on the unfiltered component of the left channel and
// the filtered component of the right channel.
int32_t wet = (ch == 1) ? echo_output << 16 : 0;
int32_t dry = (ch == 0) ? echo_output << 16 : 0;
int32_t wet = (ch == 1) ? echo_output << 14 : 0;
int32_t dry = (ch == 0) ? echo_output << 14 : 0;
for (int i = 0; i < 19; i++)
{
uint16_t pan_index = m_voice_pan[i] + (ch * PAN_TABLE_CH_OFFSET);
// Apply different volume tables on the dry and wet inputs.
dry -= (m_voice_output[i] * (int16_t)read_dsp_rom(pan_index + PAN_TABLE_DRY)) << 2;
wet -= (m_voice_output[i] * (int16_t)read_dsp_rom(pan_index + PAN_TABLE_WET)) << 2;
dry -= (m_voice_output[i] * (int16_t)read_dsp_rom(pan_index + PAN_TABLE_DRY));
wet -= (m_voice_output[i] * (int16_t)read_dsp_rom(pan_index + PAN_TABLE_WET));
}
// Saturate accumulated voices
dry = (std::min<int32_t>(std::max<int32_t>(dry, -0x1fffffff), 0x1fffffff)) << 2;
wet = (std::min<int32_t>(std::max<int32_t>(wet, -0x1fffffff), 0x1fffffff)) << 2;
// Apply FIR filter on 'wet' input
wet = m_filter[ch].apply(wet >> 16);
@ -551,11 +555,11 @@ void qsound_hle_device::state_normal_update()
dry = m_alt_filter[ch].apply(dry >> 16);
// output goes through a delay line and attenuation
int32_t output = (m_wet[ch].apply(wet) + m_dry[ch].apply(dry)) << 2;
int32_t output = (m_wet[ch].apply(wet) + m_dry[ch].apply(dry));
// DSP round function
output = (output + 0x8000) & ~0xffff;
m_out[ch] = output >> 16;
output = (output + 0x2000) & ~0x3fff;
m_out[ch] = (std::min<int32_t>(std::max<int32_t>(output >> 14, -0x7fff), 0x7fff));
if (m_delay_update)
{