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.
89 lines
2.3 KiB
C++
89 lines
2.3 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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#include <sstream>
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#include <algorithm>
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#include "helpers/MemoryHelper.h"
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#include "helpers/LogHelper.h"
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#include "ChannelFilter.h"
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using namespace std;
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ChannelFilter::ChannelFilter(const vector<wstring>& words)
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:words(words)
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{
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}
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ChannelFilter::~ChannelFilter()
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{
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}
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vector<wstring> ChannelFilter::initialize(float sampleRate, unsigned maxFrameCount, vector<wstring> channelNames)
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{
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size_t channelCount = channelNames.size();
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vector<bool> selectedChannels = vector<bool>(channelCount, false);
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for(vector<wstring>::iterator it = words.begin(); it != words.end(); it++)
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{
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wstring currentWord = *it;
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int channelNr = -1;
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if(currentWord == L"ALL")
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selectedChannels = vector<bool>(channelCount, true);
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else
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channelNr = getChannelIndex(currentWord, channelNames);
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if(channelNr != -1 && channelNr < (int)channelCount)
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{
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selectedChannels[channelNr] = true;
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}
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}
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vector<wstring> selectedChannelNames;
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for(unsigned i=0; i<channelCount; i++)
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{
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if(selectedChannels[i])
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selectedChannelNames.push_back(channelNames[i]);
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}
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wstringstream channelNumbers;
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for(size_t c=0; c<channelCount; c++)
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{
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if(selectedChannels[c])
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{
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if(channelNumbers.tellp() > 0)
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channelNumbers << L", ";
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channelNumbers << c+1;
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}
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}
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TraceF(L"Selecting channel(s) number %s", channelNumbers.str().c_str());
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return selectedChannelNames;
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}
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#pragma AVRT_CODE_BEGIN
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void ChannelFilter::process(float** output, float** input, unsigned frameCount)
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{
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// nothing to do
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}
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#pragma AVRT_CODE_END
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