jthedering
b8cdd47f71
Added: Configuration Editor, which allows to edit configurations in a graphical user interface. Contains GUIs for most commands supported by E-APO, but as lines can also be edited directly, all commands can be used. Added: Command "GraphicEQ", which can act as a regular, fixed-band graphic equalizer (via the GUI) but also supports variable bands so that any desired frequency response can be specified. Internally, it is implemented via convolution with a generated IR. Added: Command "Convolution", which allows to convolve the signal with a user-provided impulse response to achieve e.g. equalization or reverberation effects. Improved: Configurator performs checks for registry values that are needed for the operation of E-APO, which may be changed by driver installations, fixing the values if necessary. Improved: Configurator shows which is the default device as a hint to the user.
124 lines
3.6 KiB
C++
124 lines
3.6 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 "stdafx.h"
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#include <cmath>
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#include "helpers/MemoryHelper.h"
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#include "DelayFilter.h"
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using namespace std;
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DelayFilter::DelayFilter(double delay, bool isMs)
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:delay(delay), isMs(isMs)
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{
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buffers = NULL;
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}
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DelayFilter::~DelayFilter()
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{
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cleanup();
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}
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vector<wstring> DelayFilter::initialize(float sampleRate, unsigned maxFrameCount, vector<wstring> channelNames)
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{
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cleanup();
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channelCount = (unsigned)channelNames.size();
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if(isMs)
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bufferLength = (unsigned)(sampleRate * delay / 1000.0 + 0.5);
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else
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bufferLength = (unsigned)(delay + 0.5);
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buffers = (float**)MemoryHelper::alloc(sizeof(float*) * channelCount);
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for(unsigned i=0; i<channelCount; i++)
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{
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buffers[i] = (float*)MemoryHelper::alloc(sizeof(float) * bufferLength);
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memset(buffers[i], 0, sizeof(float) * bufferLength);
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}
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bufferOffset = 0;
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return channelNames;
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}
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#pragma AVRT_CODE_BEGIN
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void DelayFilter::process(float** output, float** input, unsigned frameCount)
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{
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for(unsigned i=0; i<channelCount; i++)
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{
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float* inputChannel = input[i];
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float* outputChannel = output[i];
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float* bufferChannel = buffers[i];
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if(bufferLength <= frameCount)
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{
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memcpy(outputChannel, bufferChannel + bufferOffset, (bufferLength - bufferOffset) * sizeof(float));
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memcpy(outputChannel + bufferLength - bufferOffset, bufferChannel, bufferOffset * sizeof(float));
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memcpy(outputChannel + bufferLength, inputChannel, (frameCount - bufferLength) * sizeof(float));
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memcpy(bufferChannel, inputChannel + frameCount - bufferLength, bufferLength * sizeof(float));
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}
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else
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{
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if(bufferLength < bufferOffset + frameCount)
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{
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memcpy(outputChannel, bufferChannel + bufferOffset, (bufferLength - bufferOffset) * sizeof(float));
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memcpy(outputChannel + bufferLength - bufferOffset, bufferChannel, (frameCount - (bufferLength - bufferOffset)) * sizeof(float));
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memcpy(bufferChannel + bufferOffset, inputChannel, (bufferLength - bufferOffset) * sizeof(float));
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memcpy(bufferChannel, inputChannel + bufferLength - bufferOffset, (frameCount - (bufferLength - bufferOffset)) * sizeof(float));
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}
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else
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{
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memcpy(outputChannel, bufferChannel + bufferOffset, frameCount * sizeof(float));
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memcpy(bufferChannel + bufferOffset, inputChannel, frameCount * sizeof(float));
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}
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}
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}
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if(bufferLength <= frameCount)
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bufferOffset = 0;
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else
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bufferOffset = (bufferOffset + frameCount) % bufferLength;
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}
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#pragma AVRT_CODE_END
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void DelayFilter::cleanup()
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{
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if(buffers != NULL)
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{
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for(unsigned i=0; i<channelCount; i++)
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MemoryHelper::free(buffers[i]);
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MemoryHelper::free(buffers);
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buffers = NULL;
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}
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}
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bool DelayFilter::getIsMs() const
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{
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return isMs;
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}
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double DelayFilter::getDelay() const
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{
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return delay;
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}
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