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/*************************************************************************** |
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* * |
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* Copyright (C) 2008 - 2010 Christian Schoenebeck * |
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* * |
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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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* * |
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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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* * |
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* You should have received a copy of the GNU General Public License * |
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* along with this program; if not, write to the Free Software * |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, * |
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* MA 02111-1307 USA * |
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***************************************************************************/ |
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|
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#include "EffectChain.h" |
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|
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#include "../common/global_private.h" |
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|
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namespace LinuxSampler { |
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|
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EffectChain::EffectChain(AudioOutputDevice* pDevice, int iEffectChainId) { |
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this->pDevice = pDevice; |
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iID = iEffectChainId; |
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} |
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|
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void EffectChain::AppendEffect(Effect* pEffect) { |
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pEffect->InitEffect(pDevice); |
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_ChainEntry entry = { pEffect, true }; |
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vEntries.push_back(entry); |
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} |
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|
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void EffectChain::InsertEffect(Effect* pEffect, int iChainPos) throw (Exception) { |
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if (iChainPos < 0 || iChainPos >= vEntries.size()) |
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throw Exception( |
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"Cannot insert effect at chain position " + |
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ToString(iChainPos) + ", index out of bounds." |
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); |
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pEffect->InitEffect(pDevice); // might throw Exception ! |
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std::vector<_ChainEntry>::iterator iter = vEntries.begin(); |
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for (int i = 0; i < iChainPos; ++i) ++iter; |
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_ChainEntry entry = { pEffect, true }; |
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vEntries.insert(iter, entry); |
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pEffect->SetParent(this); |
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} |
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|
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void EffectChain::RemoveEffect(int iChainPos) throw (Exception) { |
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if (iChainPos < 0 || iChainPos >= vEntries.size()) |
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throw Exception( |
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"Cannot remove effect at chain position " + |
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ToString(iChainPos) + ", index out of bounds." |
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); |
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std::vector<_ChainEntry>::iterator iter = vEntries.begin(); |
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for (int i = 0; i < iChainPos; ++i) ++iter; |
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Effect* pEffect = (*iter).pEffect; |
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vEntries.erase(iter); |
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pEffect->SetParent(NULL); // mark effect as not in use anymore |
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} |
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|
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void EffectChain::RenderAudio(uint Samples) { |
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for (int i = 0; i < vEntries.size(); ++i) { |
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Effect* pCurrentEffect = vEntries[i].pEffect; |
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if (i) { // import signal from previous effect |
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Effect* pPrevEffect = vEntries[i - 1].pEffect; |
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for (int iChan = 0; iChan < pPrevEffect->OutputChannelCount() && iChan < pCurrentEffect->InputChannelCount(); ++iChan) { |
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pPrevEffect->OutputChannel(iChan)->MixTo( |
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pCurrentEffect->InputChannel(iChan), |
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Samples |
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); |
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} |
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} |
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if (IsEffectActive(i)) pCurrentEffect->RenderAudio(Samples); |
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else { //TODO: lazy, suboptimal implementation of inactive, bypassed effects |
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for (int iChan = 0; iChan < pCurrentEffect->OutputChannelCount() && iChan < pCurrentEffect->InputChannelCount(); ++iChan) { |
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pCurrentEffect->InputChannel(iChan)->MixTo( |
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pCurrentEffect->OutputChannel(iChan), |
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Samples |
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); |
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} |
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} |
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} |
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} |
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|
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Effect* EffectChain::GetEffect(int iChainPos) const { |
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if (iChainPos < 0 || iChainPos >= vEntries.size()) return NULL; |
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return vEntries[iChainPos].pEffect; |
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} |
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|
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int EffectChain::EffectCount() const { |
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return vEntries.size(); |
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} |
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|
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void EffectChain::SetEffectActive(int iChainPos, bool bOn) throw (Exception) { |
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if (iChainPos < 0 || iChainPos >= vEntries.size()) |
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throw Exception( |
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"Cannot change active state of effect at chain position " + |
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ToString(iChainPos) + ", index out of bounds." |
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); |
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vEntries[iChainPos].bActive = bOn; |
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} |
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|
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bool EffectChain::IsEffectActive(int iChainPos) const { |
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if (iChainPos < 0 || iChainPos >= vEntries.size()) return false; |
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return vEntries[iChainPos].bActive; |
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} |
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|
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void EffectChain::ClearAllChannels() { |
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for (int iEffect = 0; iEffect < vEntries.size(); ++iEffect) { |
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Effect* pEffect = vEntries[iEffect].pEffect; |
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for (int i = 0; i < pEffect->InputChannelCount(); ++i) |
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pEffect->InputChannel(i)->Clear(); // zero out buffers |
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for (int i = 0; i < pEffect->OutputChannelCount(); ++i) |
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pEffect->OutputChannel(i)->Clear(); // zero out buffers |
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} |
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} |
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|
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int EffectChain::ID() const { |
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return iID; |
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} |
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|
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} // namespace LinuxSampler |
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