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Re-enables key-level scaling, with 3db and 1.5db the correct way around.

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This commit is contained in:
Thomas Harte 2020-04-21 20:10:40 -04:00
parent a4d3865394
commit 40424ac38b
1 changed files with 17 additions and 15 deletions
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32
Components/OPL2/Implementation/Operator.cpp
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@ -177,9 +177,9 @@ void Operator::update(OperatorState &state, bool key_on, int channel_period, int
// Calculate key-level scaling. Table is as per p14 of the YM3812 application manual,
// converted into a fixed-point scheme. Compare with https://www.smspower.org/Development/RE12
// and apologies for the highly ad hoc indentation.
/* constexpr int key_level_scales[4][8][16] = {
constexpr int key_level_scales[4][8][16] = {
#define _ 0
{
{ // 0 db of attenuation.
{_, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _},
{_, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _},
{_, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _},
@ -189,17 +189,7 @@ void Operator::update(OperatorState &state, bool key_on, int channel_period, int
{_, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _},
{_, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _},
},
{
{_, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _},
{_, _, _, _, _, _, _, _, _, 1, 1, 2, 2, 3, 3, 4},
{_, _, _, _, _, 1, 2, 3, 4, 5, 5, 6, 6, 7, 7, 8},
{_, _, _, 2, 4, 5, 6, 7, 8, 9, 9, 10, 10, 11, 11, 12},
{_, _, 4, 6, 8, 9, 10, 11, 12, 13, 13, 14, 14, 15, 15, 16},
{_, 4, 8, 10, 12, 13, 14, 15, 16, 17, 17, 18, 18, 19, 19, 20},
{_, 8, 12, 14, 16, 17, 18, 19, 20, 21, 21, 22, 22, 23, 23, 24},
{_, 12, 16, 18, 20, 21, 22, 23, 24, 25, 25, 26, 26, 27, 27, 28},
},
{
{ // 3 db.
{_, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _},
{_, _, _, _, _, _, _, _, _, 2, 3, 4, 5, 6, 7, 8},
{_, _, _, _, _, 3, 5, 7, 8, 10, 11, 12, 13, 14, 15, 16},
@ -209,7 +199,17 @@ void Operator::update(OperatorState &state, bool key_on, int channel_period, int
{_, 16, 24, 29, 32, 35, 37, 39, 40, 42, 43, 44, 45, 46, 47, 48},
{_, 24, 32, 37, 40, 43, 45, 47, 48, 50, 51, 52, 53, 54, 55, 56},
},
{
{ // 1.5 db.
{_, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _},
{_, _, _, _, _, _, _, _, _, 1, 1, 2, 2, 3, 3, 4},
{_, _, _, _, _, 1, 2, 3, 4, 5, 5, 6, 6, 7, 7, 8},
{_, _, _, 2, 4, 5, 6, 7, 8, 9, 9, 10, 10, 11, 11, 12},
{_, _, 4, 6, 8, 9, 10, 11, 12, 13, 13, 14, 14, 15, 15, 16},
{_, 4, 8, 10, 12, 13, 14, 15, 16, 17, 17, 18, 18, 19, 19, 20},
{_, 8, 12, 14, 16, 17, 18, 19, 20, 21, 21, 22, 22, 23, 23, 24},
{_, 12, 16, 18, 20, 21, 22, 23, 24, 25, 25, 26, 26, 27, 27, 28},
},
{ // 6 db.
{_, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _},
{_, _, _, _, _, _, _, _, _, 4, 6, 8, 10, 12, 14, 16},
{_, _, _, _, _, 6, 10, 14, 16, 20, 22, 24, 26, 28, 30, 32},
@ -221,7 +221,9 @@ void Operator::update(OperatorState &state, bool key_on, int channel_period, int
},
#undef _
};
state.attenuation.log += key_level_scales[key_level_scaling_][channel_octave][channel_period >> 6] << 7;*/
assert((channel_period >> 6) < 4);
assert(channel_octave < 8);
state.attenuation.log += key_level_scales[key_level_scaling_][channel_octave][channel_period >> 6] << 7;
// Combine the ADSR attenuation and overall channel attenuation.
if(overrides) {