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SPU2-X Reverb: make the filter actually look the way a FIR filter is supposed to look. 

git-svn-id: http://pcsx2.googlecode.com/svn/trunk@4687 96395faa-99c1-11dd-bbfe-3dabce05a288
This commit is contained in:
gigaherz 2011-05-28 16:46:41 +00:00
parent 881982229c
commit ea367e8326
1 changed files with 13 additions and 13 deletions
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26
plugins/spu2-x/src/Reverb.cpp
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@ -180,7 +180,7 @@ StereoOut32 V_Core::DoReverb( const StereoOut32& Input )
// http://cnx.org/content/m15491/latest/ // http://cnx.org/content/m15491/latest/
////////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////////
// Part 1: Input filter block // Part 1: Input filter block (FIR filter)
// Purpose: Filter and write data to the sample queues for the echos below // Purpose: Filter and write data to the sample queues for the echos below
INPUT_SAMPLE.Left >>= 16; INPUT_SAMPLE.Left >>= 16;
@ -189,20 +189,20 @@ StereoOut32 V_Core::DoReverb( const StereoOut32& Input )
s32 input_L = (INPUT_SAMPLE.Left * Revb.IN_COEF_L); s32 input_L = (INPUT_SAMPLE.Left * Revb.IN_COEF_L);
s32 input_R = (INPUT_SAMPLE.Right * Revb.IN_COEF_R); s32 input_R = (INPUT_SAMPLE.Right * Revb.IN_COEF_R);
const s32 IIR_INPUT_A0 = ((_spu2mem[src_a0] * Revb.IIR_COEF) + input_L)>>16; const s32 IIR_A0 = (_spu2mem[src_a0] * Revb.IIR_COEF) + input_L;
const s32 IIR_INPUT_A1 = ((_spu2mem[src_a1] * Revb.IIR_COEF) + input_L)>>16; const s32 IIR_A1 = (_spu2mem[src_a1] * Revb.IIR_COEF) + input_R;
const s32 IIR_INPUT_B0 = ((_spu2mem[src_b0] * Revb.IIR_COEF) + input_R)>>16; const s32 IIR_B0 = (_spu2mem[src_b0] * Revb.IIR_COEF) + input_L;
const s32 IIR_INPUT_B1 = ((_spu2mem[src_b1] * Revb.IIR_COEF) + input_R)>>16; const s32 IIR_B1 = (_spu2mem[src_b1] * Revb.IIR_COEF) + input_R;
const s32 IIR_A0 = _spu2mem[dest_a0]; const s32 IIR_C0 = _spu2mem[dest_a0]* Revb.IIR_ALPHA;
const s32 IIR_A1 = _spu2mem[dest_a1]; const s32 IIR_C1 = _spu2mem[dest_a1]* Revb.IIR_ALPHA;
const s32 IIR_B0 = _spu2mem[dest_b0]; const s32 IIR_D0 = _spu2mem[dest_b0]* Revb.IIR_ALPHA;
const s32 IIR_B1 = _spu2mem[dest_b1]; const s32 IIR_D1 = _spu2mem[dest_b1]* Revb.IIR_ALPHA;
_spu2mem[dest2_a0] = clamp_mix( IIR_A0 + (((IIR_INPUT_A0-IIR_A0) * Revb.IIR_ALPHA) >> 16) ); _spu2mem[dest2_a0] = clamp_mix( (IIR_A0-IIR_C0) >> 16 );
_spu2mem[dest2_a1] = clamp_mix( IIR_A1 + (((IIR_INPUT_A1-IIR_A1) * Revb.IIR_ALPHA) >> 16) ); _spu2mem[dest2_a1] = clamp_mix( (IIR_A1-IIR_C1) >> 16 );
_spu2mem[dest2_b0] = clamp_mix( IIR_B0 + (((IIR_INPUT_B0-IIR_B0) * Revb.IIR_ALPHA) >> 16) ); _spu2mem[dest2_b0] = clamp_mix( (IIR_B0-IIR_D0) >> 16 );
_spu2mem[dest2_b1] = clamp_mix( IIR_B1 + (((IIR_INPUT_B1-IIR_B1) * Revb.IIR_ALPHA) >> 16) ); _spu2mem[dest2_b1] = clamp_mix( (IIR_B1-IIR_D1) >> 16 );
////////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////////