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.
96 lines
2.9 KiB
C++
96 lines
2.9 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 "helpers/MemoryHelper.h"
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#include "helpers/StringHelper.h"
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#include "helpers/LogHelper.h"
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#include "CopyFilter.h"
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#include "CopyFilterFactory.h"
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using namespace std;
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vector<IFilter*> CopyFilterFactory::createFilter(const wstring& configPath, wstring& command, wstring& parameters)
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{
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CopyFilter* filter = NULL;
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if(command == L"Copy")
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{
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vector<Assignment> assignments;
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vector<wstring> assignmentStrings = StringHelper::split(parameters, L' ');
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for(vector<wstring>::iterator it=assignmentStrings.begin(); it!=assignmentStrings.end(); it++)
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{
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Assignment assignment;
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vector<wstring> parts = StringHelper::split(*it, L'=');
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if(parts.size() == 2)
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{
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wstring target = parts[0];
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wstring source = parts[1];
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assignment.targetChannel = target;
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vector<wstring> summands = StringHelper::split(source, '+');
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for(vector<wstring>::iterator it2=summands.begin(); it2!=summands.end(); it2++)
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{
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vector<wstring> factors = StringHelper::split(*it2, '*');
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wstring factor;
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wstring channel;
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if(factors.size() == 2)
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{
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factor = factors[0];
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channel = factors[1];
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}
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else if(factors.size() == 1)
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{
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if(factors[0] == L"0" || factors[0].find(L'.') != wstring::npos)
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factor = factors[0];
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else
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channel = factors[0];
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}
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Assignment::Summand summand;
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if(factor == L"")
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{
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summand.factor = 1.0;
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summand.isDecibel = false;
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}
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else
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{
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summand.factor = wcstod(factor.c_str(), NULL);
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summand.isDecibel = factor.size() > 2 && StringHelper::toLowerCase(factor.substr(factor.size()-2)) == L"db";
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}
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summand.channel = channel;
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assignment.sourceSum.push_back(summand);
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}
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}
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if(assignment.targetChannel != L"" && !assignment.sourceSum.empty())
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assignments.push_back(assignment);
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}
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void* mem = MemoryHelper::alloc(sizeof(CopyFilter));
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filter = new(mem) CopyFilter(assignments);
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}
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if(filter == NULL)
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return vector<IFilter*>(0);
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return vector<IFilter*>(1, filter);
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} |