jthedering
90ee2b0aa9
Added: Filter type "IIR", which allows to specify a user-defined IIR filter of arbitrary order with custom coefficients. Improved: For playback devices, the APO is now installed both as GFX (post-mix) and LFX (pre-mix) APO. Normally the filtering happens in GFX, but the command "Stage" allows to select LFX to apply effects based on the number of input channels. Added: Expression language. The commands "If", "ElseIf", "Else", "EndIf", "Eval" and inline expressions allow to change the filter behaviour based on runtime conditions. Added: Command "Copy", which copies audio data between channels. Added: Command "Delay", which delays the audio on the currently selected channels. Improved: Configuration files are now locked exclusively for writing while reading them. Improved: There is now a transition (10 ms) from old to new configuration after loading. Improved: Substantial internal restructuring to improve extensibility and maintainability. Filtering commands now work exactly in the order they were specified. Fixed: When the microphone input was in stereo but the application requested a mono stream, the audio was heavily distorted. Fixed: The sine sweep generated by the Benchmark application had floating-point precision issues leading to severe artifacts when certain filters were applied.
52 lines
1.5 KiB
C++
52 lines
1.5 KiB
C++
/*
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This file is part of EqualizerAPO, a system-wide equalizer.
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Copyright (C) 2014 Jonas Thedering
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#define _USE_MATH_DEFINES
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#include <cmath>
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#include "PreampFilter.h"
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using namespace std;
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PreampFilter::PreampFilter(double dbGain)
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:dbGain(dbGain)
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{
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gain = (float)pow(10.0, dbGain / 20.0);
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}
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vector<wstring> PreampFilter::initialize(float sampleRate, unsigned maxFrameCount, vector<wstring> channelNames)
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{
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this->channelCount = channelNames.size();
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return channelNames;
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}
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#pragma AVRT_CODE_BEGIN
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void PreampFilter::process(float** output, float** input, unsigned frameCount)
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{
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for(size_t i=0; i<channelCount; i++)
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{
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float* sampleChannel = input[i];
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for(unsigned j=0; j<frameCount; j++)
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sampleChannel[j] *= gain;
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}
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}
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#pragma AVRT_CODE_END
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