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.
112 lines
3.9 KiB
C++
112 lines
3.9 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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#pragma once
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#include <string>
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#include <vector>
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#include <hash_map>
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#include <hash_set>
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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#include <mpParser.h>
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#include "IFilterFactory.h"
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#include "FilterConfiguration.h"
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#include "helpers/PrecisionTimer.h"
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#include "helpers/MemoryHelper.h"
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#pragma AVRT_VTABLES_BEGIN
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class FilterEngine
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{
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public:
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FilterEngine();
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~FilterEngine();
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void setLfx(bool lfx);
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void setDeviceInfo(bool capture, const std::wstring& deviceName, const std::wstring& connectionName, const std::wstring& deviceGuid);
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void initialize(float sampleRate, unsigned inputChannelCount, unsigned realChannelCount, unsigned outputChannelCount, unsigned channelMask, unsigned maxFrameCount);
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void loadConfig();
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void loadConfig(const std::wstring& path);
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void watchRegistryKey(const std::wstring& key);
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void process(float *output, float *input, unsigned frameCount);
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bool isLfx() const {return lfx;}
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bool isCapture() const {return capture;}
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std::wstring getDeviceName() const {return deviceName;}
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std::wstring getConnectionName() const {return connectionName;}
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std::wstring getDeviceGuid() const {return deviceGuid;}
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unsigned getInputChannelCount() const {return inputChannelCount;}
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unsigned getRealChannelCount() const {return realChannelCount;}
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unsigned getOutputChannelCount() const {return outputChannelCount;}
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unsigned getChannelMask() const {return channelMask;}
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float getSampleRate() const {return sampleRate;}
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unsigned getMaxFrameCount() const {return maxFrameCount;}
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mup::ParserX* getParser() {return &parser;}
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private:
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void addFilters(std::vector<IFilter*> filters);
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void cleanupConfigurations();
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static unsigned long __stdcall notificationThread(void* parameter);
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std::vector<IFilterFactory*> factories;
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bool lfx;
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bool capture;
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std::wstring deviceName;
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std::wstring connectionName;
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std::wstring deviceGuid;
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std::wstring configPath;
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float sampleRate;
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// number of input channels that originally existed before child APO processing
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unsigned inputChannelCount;
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// number of input channels in process (including channels coming from child APO output)
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unsigned realChannelCount;
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unsigned outputChannelCount;
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unsigned channelMask;
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unsigned maxFrameCount;
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// only used during loading
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std::vector<FilterInfo*> filterInfos;
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std::vector<std::wstring> currentChannelNames;
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std::vector<std::wstring> lastChannelNames;
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std::vector<std::wstring> lastNewChannelNames;
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std::vector<std::wstring> allChannelNames;
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bool lastInPlace;
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mup::ParserX parser;
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FilterConfiguration* currentConfig;
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FilterConfiguration* nextConfig;
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FilterConfiguration* previousConfig;
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unsigned transitionCounter;
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unsigned transitionLength;
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HANDLE loadSemaphore;
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CRITICAL_SECTION loadSection;
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PrecisionTimer timer;
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void* threadHandle;
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void* shutdownEvent;
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stdext::hash_set<std::wstring> watchRegistryKeys;
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bool lastInputWasSilent;
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unsigned lastInputSize;
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stdext::hash_map<std::wstring, int> channelNameToPosMap;
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stdext::hash_map<int, std::wstring> channelPosToNameMap;
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};
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#pragma AVRT_VTABLES_END
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