Version 1.0
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.
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/*
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This file is part of EqualizerAPO, a system-wide equalizer.
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Copyright (C) 2015 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 <algorithm>
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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#include <Ks.h>
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#include <KsMedia.h>
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#include "LogHelper.h"
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#include "ChannelHelper.h"
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using namespace std;
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unordered_map<wstring, int> ChannelHelper::channelNameToPosMap;
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unordered_map<int, wstring> ChannelHelper::channelPosToNameMap;
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// must come last, so that the static members are already initialized
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ChannelHelper ChannelHelper::instance;
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ChannelHelper::ChannelHelper()
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{
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channelNameToPosMap[L"L"] = SPEAKER_FRONT_LEFT;
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channelNameToPosMap[L"R"] = SPEAKER_FRONT_RIGHT;
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channelNameToPosMap[L"C"] = SPEAKER_FRONT_CENTER;
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channelNameToPosMap[L"SUB"] = SPEAKER_LOW_FREQUENCY;
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channelNameToPosMap[L"RL"] = SPEAKER_BACK_LEFT;
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channelNameToPosMap[L"RR"] = SPEAKER_BACK_RIGHT;
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channelNameToPosMap[L"RC"] = SPEAKER_BACK_CENTER;
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channelNameToPosMap[L"SL"] = SPEAKER_SIDE_LEFT;
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channelNameToPosMap[L"SR"] = SPEAKER_SIDE_RIGHT;
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for(unordered_map<wstring, int>::iterator it=channelNameToPosMap.begin(); it!=channelNameToPosMap.end(); it++)
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channelPosToNameMap[it->second] = it->first;
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}
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int ChannelHelper::getDefaultChannelMask(int channelCount)
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{
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int channelMask;
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switch(channelCount)
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{
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case 1:
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channelMask = KSAUDIO_SPEAKER_MONO;
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break;
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case 2:
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channelMask = KSAUDIO_SPEAKER_STEREO;
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break;
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case 4:
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channelMask = KSAUDIO_SPEAKER_QUAD;
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break;
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case 6:
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channelMask = KSAUDIO_SPEAKER_5POINT1_SURROUND;
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break;
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case 8:
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channelMask = KSAUDIO_SPEAKER_7POINT1_SURROUND;
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break;
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default:
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channelMask = 0;
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}
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return channelMask;
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}
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vector<wstring> ChannelHelper::getChannelNames(int channelCount, int channelMask)
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{
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vector<wstring> channelNames;
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int c=1;
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for(int i=0; i<31; i++)
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{
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int channelPos = 1<<i;
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if(channelMask & channelPos)
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{
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if(channelPosToNameMap.find(channelPos) != channelPosToNameMap.end())
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channelNames.push_back(channelPosToNameMap[channelPos]);
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else
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channelNames.push_back(to_wstring((unsigned long long)c));
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c++;
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}
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}
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// handle channels not covered by channelMask
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for(; c<=channelCount; c++)
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channelNames.push_back(to_wstring((unsigned long long)c));
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return channelNames;
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}
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int ChannelHelper::getChannelIndex(std::wstring word, const std::vector<std::wstring>& channelNames, bool allowNew)
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{
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int channelIndex = -1;
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if(iswdigit(word[0]))
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{
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channelIndex = wcstol(word.c_str(), NULL, 10) - 1;
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if(channelIndex < 0 || channelIndex >= (int)channelNames.size())
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{
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LogFStatic(L"Channel number %s out of range (1 - %d)", word.c_str(), channelNames.size());
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channelIndex = -1;
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}
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}
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else
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{
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vector<wstring>::const_iterator pos = find(channelNames.begin(), channelNames.end(), word);
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if(pos == channelNames.end())
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{
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//Special handling to accept "wrong", but unambiguous positions
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if(word == L"SL")
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pos = find(channelNames.begin(), channelNames.end(), L"RL");
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else if(word == L"SR")
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pos = find(channelNames.begin(), channelNames.end(), L"RR");
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else if(word == L"RL")
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pos = find(channelNames.begin(), channelNames.end(), L"SL");
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else if(word == L"RR")
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pos = find(channelNames.begin(), channelNames.end(), L"SR");
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}
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if(pos != channelNames.end())
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channelIndex = (int)(pos - channelNames.begin());
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else if(!allowNew)
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LogFStatic(L"Invalid channel position %s", word.c_str());
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}
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return channelIndex;
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}
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