src/effects/EffectChain.cpp

/***************************************************************************
 *                                                                         *
 *   Copyright (C) 2008 - 2010 Christian Schoenebeck                       *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the Free Software           *
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston,                 *
 *   MA  02111-1307  USA                                                   *
 ***************************************************************************/

#include "EffectChain.h"

#include "../common/global_private.h"

namespace LinuxSampler {

EffectChain::EffectChain(AudioOutputDevice* pDevice, int iEffectChainId) {
    this->pDevice = pDevice;
    iID = iEffectChainId;
}

void EffectChain::AppendEffect(Effect* pEffect) {
    pEffect->InitEffect(pDevice);
    _ChainEntry entry = { pEffect, true };
    vEntries.push_back(entry);
}

void EffectChain::InsertEffect(Effect* pEffect, int iChainPos) throw (Exception) {
    if (iChainPos < 0 || iChainPos >= vEntries.size())
        throw Exception(
            "Cannot insert effect at chain position " +
            ToString(iChainPos) + ", index out of bounds."
        );
    pEffect->InitEffect(pDevice); // might throw Exception !
    std::vector<_ChainEntry>::iterator iter = vEntries.begin();
    for (int i = 0; i < iChainPos; ++i) ++iter;
    _ChainEntry entry = { pEffect, true };
    vEntries.insert(iter, entry);
    pEffect->SetParent(this);
}

void EffectChain::RemoveEffect(int iChainPos) throw (Exception) {
    if (iChainPos < 0 || iChainPos >= vEntries.size())
        throw Exception(
            "Cannot remove effect at chain position " +
            ToString(iChainPos) + ", index out of bounds."
        );
    std::vector<_ChainEntry>::iterator iter = vEntries.begin();
    for (int i = 0; i < iChainPos; ++i) ++iter;
    Effect* pEffect = (*iter).pEffect;
    vEntries.erase(iter);
    pEffect->SetParent(NULL); // mark effect as not in use anymore
}

void EffectChain::RenderAudio(uint Samples) {
    for (int i = 0; i < vEntries.size(); ++i) {
        Effect* pCurrentEffect = vEntries[i].pEffect;
        if (i) { // import signal from previous effect
            Effect* pPrevEffect = vEntries[i - 1].pEffect;
            for (int iChan = 0; iChan < pPrevEffect->OutputChannelCount() && iChan < pCurrentEffect->InputChannelCount(); ++iChan) {
                pPrevEffect->OutputChannel(iChan)->MixTo(
                    pCurrentEffect->InputChannel(iChan),
                    Samples
                );
            }
        }
        if (IsEffectActive(i)) pCurrentEffect->RenderAudio(Samples);
        else { //TODO: lazy, suboptimal implementation of inactive, bypassed effects
            for (int iChan = 0; iChan < pCurrentEffect->OutputChannelCount() && iChan < pCurrentEffect->InputChannelCount(); ++iChan) {
                pCurrentEffect->InputChannel(iChan)->MixTo(
                    pCurrentEffect->OutputChannel(iChan),
                    Samples
                );
            }
        }
    }
}

Effect* EffectChain::GetEffect(int iChainPos) const {
    if (iChainPos < 0 || iChainPos >= vEntries.size()) return NULL;
    return vEntries[iChainPos].pEffect;
}

int EffectChain::EffectCount() const {
    return vEntries.size();
}

void EffectChain::SetEffectActive(int iChainPos, bool bOn) throw (Exception) {
    if (iChainPos < 0 || iChainPos >= vEntries.size())
        throw Exception(
            "Cannot change active state of effect at chain position " +
            ToString(iChainPos) + ", index out of bounds."
        );
    vEntries[iChainPos].bActive = bOn;
}

bool EffectChain::IsEffectActive(int iChainPos) const {
    if (iChainPos < 0 || iChainPos >= vEntries.size()) return false;
    return vEntries[iChainPos].bActive;
}

void EffectChain::ClearAllChannels() {
    for (int iEffect = 0; iEffect < vEntries.size(); ++iEffect) {
        Effect* pEffect = vEntries[iEffect].pEffect;
        for (int i = 0; i < pEffect->InputChannelCount(); ++i)
            pEffect->InputChannel(i)->Clear(); // zero out buffers
        for (int i = 0; i < pEffect->OutputChannelCount(); ++i)
            pEffect->OutputChannel(i)->Clear(); // zero out buffers
    }
}

int EffectChain::ID() const {
    return iID;
}

} // namespace LinuxSampler
1	schoenebeck	1722	/***************************************************************************
2			* *
3	schoenebeck	2135	* Copyright (C) 2008 - 2010 Christian Schoenebeck *
4	schoenebeck	1722	* *
5			* This program is free software; you can redistribute it and/or modify *
6			* it under the terms of the GNU General Public License as published by *
7			* the Free Software Foundation; either version 2 of the License, or *
8			* (at your option) any later version. *
9			* *
10			* This program is distributed in the hope that it will be useful, *
11			* but WITHOUT ANY WARRANTY; without even the implied warranty of *
12			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
13			* GNU General Public License for more details. *
14			* *
15			* You should have received a copy of the GNU General Public License *
16			* along with this program; if not, write to the Free Software *
17			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, *
18			* MA 02111-1307 USA *
19			***************************************************************************/
20
21			#include "EffectChain.h"
22
23			#include "../common/global_private.h"
24
25			namespace LinuxSampler {
26
27	schoenebeck	2135	EffectChain::EffectChain(AudioOutputDevice* pDevice, int iEffectChainId) {
28	schoenebeck	1722	this->pDevice = pDevice;
29	schoenebeck	2135	iID = iEffectChainId;
30	schoenebeck	1722	}
31
32			void EffectChain::AppendEffect(Effect* pEffect) {
33			pEffect->InitEffect(pDevice);
34			_ChainEntry entry = { pEffect, true };
35			vEntries.push_back(entry);
36			}
37
38			void EffectChain::InsertEffect(Effect* pEffect, int iChainPos) throw (Exception) {
39			if (iChainPos < 0 \|\| iChainPos >= vEntries.size())
40			throw Exception(
41			"Cannot insert effect at chain position " +
42			ToString(iChainPos) + ", index out of bounds."
43			);
44	schoenebeck	2124	pEffect->InitEffect(pDevice); // might throw Exception !
45	schoenebeck	1722	std::vector<_ChainEntry>::iterator iter = vEntries.begin();
46			for (int i = 0; i < iChainPos; ++i) ++iter;
47			_ChainEntry entry = { pEffect, true };
48			vEntries.insert(iter, entry);
49	schoenebeck	2135	pEffect->SetParent(this);
50	schoenebeck	1722	}
51
52			void EffectChain::RemoveEffect(int iChainPos) throw (Exception) {
53			if (iChainPos < 0 \|\| iChainPos >= vEntries.size())
54			throw Exception(
55			"Cannot remove effect at chain position " +
56			ToString(iChainPos) + ", index out of bounds."
57			);
58			std::vector<_ChainEntry>::iterator iter = vEntries.begin();
59			for (int i = 0; i < iChainPos; ++i) ++iter;
60	schoenebeck	2135	Effect* pEffect = (*iter).pEffect;
61	schoenebeck	1722	vEntries.erase(iter);
62	schoenebeck	2135	pEffect->SetParent(NULL); // mark effect as not in use anymore
63	schoenebeck	1722	}
64
65			void EffectChain::RenderAudio(uint Samples) {
66			for (int i = 0; i < vEntries.size(); ++i) {
67			Effect* pCurrentEffect = vEntries[i].pEffect;
68			if (i) { // import signal from previous effect
69			Effect* pPrevEffect = vEntries[i - 1].pEffect;
70			for (int iChan = 0; iChan < pPrevEffect->OutputChannelCount() && iChan < pCurrentEffect->InputChannelCount(); ++iChan) {
71			pPrevEffect->OutputChannel(iChan)->MixTo(
72			pCurrentEffect->InputChannel(iChan),
73			Samples
74			);
75			}
76			}
77			if (IsEffectActive(i)) pCurrentEffect->RenderAudio(Samples);
78			else { //TODO: lazy, suboptimal implementation of inactive, bypassed effects
79			for (int iChan = 0; iChan < pCurrentEffect->OutputChannelCount() && iChan < pCurrentEffect->InputChannelCount(); ++iChan) {
80			pCurrentEffect->InputChannel(iChan)->MixTo(
81			pCurrentEffect->OutputChannel(iChan),
82			Samples
83			);
84			}
85			}
86			}
87			}
88
89			Effect* EffectChain::GetEffect(int iChainPos) const {
90			if (iChainPos < 0 \|\| iChainPos >= vEntries.size()) return NULL;
91			return vEntries[iChainPos].pEffect;
92			}
93
94			int EffectChain::EffectCount() const {
95			return vEntries.size();
96			}
97
98			void EffectChain::SetEffectActive(int iChainPos, bool bOn) throw (Exception) {
99			if (iChainPos < 0 \|\| iChainPos >= vEntries.size())
100			throw Exception(
101			"Cannot change active state of effect at chain position " +
102			ToString(iChainPos) + ", index out of bounds."
103			);
104			vEntries[iChainPos].bActive = bOn;
105			}
106
107			bool EffectChain::IsEffectActive(int iChainPos) const {
108			if (iChainPos < 0 \|\| iChainPos >= vEntries.size()) return false;
109			return vEntries[iChainPos].bActive;
110			}
111
112			void EffectChain::ClearAllChannels() {
113			for (int iEffect = 0; iEffect < vEntries.size(); ++iEffect) {
114			Effect* pEffect = vEntries[iEffect].pEffect;
115			for (int i = 0; i < pEffect->InputChannelCount(); ++i)
116			pEffect->InputChannel(i)->Clear(); // zero out buffers
117			for (int i = 0; i < pEffect->OutputChannelCount(); ++i)
118			pEffect->OutputChannel(i)->Clear(); // zero out buffers
119			}
120			}
121
122	schoenebeck	2135	int EffectChain::ID() const {
123			return iID;
124			}
125
126	schoenebeck	1722	} // namespace LinuxSampler