src/engines/FxSend.cpp

/***************************************************************************
 *                                                                         *
 *   LinuxSampler - modular, streaming capable sampler                     *
 *                                                                         *
 *   Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck   *
 *   Copyright (C) 2005 - 2007 Christian Schoenebeck                       *
 *                                                                         *
 *   This library 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 library 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 library; if not, write to the Free Software           *
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston,                 *
 *   MA  02111-1307  USA                                                   *
 ***************************************************************************/

#include "FxSend.h"

#include "../common/global_private.h"
#include "../drivers/audio/AudioOutputDevice.h"
#include "../common/RTMath.h"

#include <map>

#define DEFAULT_FX_SEND_LEVEL   0.0f

namespace LinuxSampler {

    FxSend::FxSend(EngineChannel* pEngineChannel, uint8_t MidiCtrl, String Name) throw (Exception) {
        this->pEngineChannel = pEngineChannel;
        AudioOutputDevice* pDevice = pEngineChannel->GetAudioOutputDevice();
        const int iChanOffset = (pDevice) ? pDevice->ChannelCount() - pEngineChannel->Channels() : 0;
        for (int i = 0; i < pEngineChannel->Channels(); i++) {
            const int iDestination = iChanOffset + i;
            Routing.push_back(iDestination);
        }
        SetMidiController(MidiCtrl);
        sName = Name;

        // create an EngineChannel unique ID for this FxSend instance
        if (!pEngineChannel->GetFxSendCount()) iId = 0;
        else {
            // get the highest existing map ID
            uint highestIndex = 0;
            for (uint i = 0; i < pEngineChannel->GetFxSendCount(); i++)
                highestIndex = RTMath::Max(highestIndex, pEngineChannel->GetFxSend(i)->Id());
            // check if we reached the index limit
            if (highestIndex + 1 < highestIndex) {
                // search for an unoccupied map ID starting from 0
                for (uint i = 0; i < highestIndex; i++) {
                    bool bOccupied = false;
                    for (uint j = 0; j < pEngineChannel->GetFxSendCount(); j++) {
                        if (pEngineChannel->GetFxSend(j)->Id() == i) {
                            bOccupied = true;
                            break;
                        }
                    }
                    if (!bOccupied) {
                        iId = i;
                        goto __done;
                    }
                }
                throw Exception("Internal error: could not find unoccupied FxSend ID.");
            }
            iId = highestIndex + 1;
        }
        __done:

        fLevel = DEFAULT_FX_SEND_LEVEL;
    }

    int FxSend::DestinationChannel(int SrcChan) {
        if (SrcChan >= pEngineChannel->Channels()) return -1;
        return Routing[SrcChan];
    }

    void FxSend::SetDestinationChannel(int SrcChan, int DstChan) throw (Exception) {
        if (SrcChan < 0 || SrcChan >= pEngineChannel->Channels())
            throw Exception("Cannot alter FxSend routing, source channel out of bounds");
        AudioOutputDevice* pDevice = pEngineChannel->GetAudioOutputDevice();
        if (pDevice) {
            if (DstChan < 0 || DstChan >= pDevice->ChannelCount())
                throw Exception("Cannot alter FxSend routing, destination channel out of bounds");
        } else { // no audio device assigned yet
            if (DstChan < 0 || DstChan >= pEngineChannel->Channels())
                throw Exception(
                    "there is no audio device yet, so you cannot set a "
                    "FxSend destination channel higher than the engine "
                    "channel's amount of channels"
                );
        }
        Routing[SrcChan] = DstChan;
    }

    void FxSend::UpdateChannels() {
        if (Routing.size() > pEngineChannel->Channels()) {
            // add routings with default destinations
            AudioOutputDevice* pDevice = pEngineChannel->GetAudioOutputDevice();
            const int iChanOffset = (pDevice) ? pDevice->ChannelCount() - pEngineChannel->Channels() : 0;
            for (int i = Routing.size(); i < pEngineChannel->Channels(); i++) {
                const int iDestination = iChanOffset + i;
                Routing.push_back(iDestination);
            }
        } else if (Routing.size() < pEngineChannel->Channels()) {
            // shrink routing vector
            Routing.resize(pEngineChannel->Channels());
        }
    }

    float FxSend::Level() {
        return fLevel;
    }

    void FxSend::SetLevel(float f) {
        if(fLevel == f) return;
        fLevel = f;
        SetInfoChanged(true);
    }

    void FxSend::SetLevel(uint8_t iMidiValue) {
        fLevel = float(iMidiValue & 0x7f) / 127.0f;
        SetInfoChanged(true);
    }

    void FxSend::Reset() {
        SetLevel(DEFAULT_FX_SEND_LEVEL);
    }

    uint8_t FxSend::MidiController() {
        return MidiFxSendController;
    }

    void FxSend::SetMidiController(uint8_t MidiCtrl) throw (Exception) {
        if (MidiCtrl >> 7)
            throw Exception("Invalid MIDI controller " + ToString((int)MidiCtrl));
        MidiFxSendController = MidiCtrl;
    }

    String FxSend::Name() {
        return sName;
    }

    void FxSend::SetName(String Name) {
        sName = Name;
    }

    uint FxSend::Id() {
        return iId;
    }

    void FxSend::SetInfoChanged(bool b) {
        bInfoChanged = b;
    }

    bool FxSend::IsInfoChanged() {
        return bInfoChanged;
    }

} // namespace LinuxSampler
1	/***************************************************************************
2	* *
3	* LinuxSampler - modular, streaming capable sampler *
4	* *
5	* Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck *
6	* Copyright (C) 2005 - 2007 Christian Schoenebeck *
7	* *
8	* This library is free software; you can redistribute it and/or modify *
9	* it under the terms of the GNU General Public License as published by *
10	* the Free Software Foundation; either version 2 of the License, or *
11	* (at your option) any later version. *
12	* *
13	* This library is distributed in the hope that it will be useful, *
14	* but WITHOUT ANY WARRANTY; without even the implied warranty of *
15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
16	* GNU General Public License for more details. *
17	* *
18	* You should have received a copy of the GNU General Public License *
19	* along with this library; if not, write to the Free Software *
20	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, *
21	* MA 02111-1307 USA *
22	***************************************************************************/
23
24	#include "FxSend.h"
25
26	#include "../common/global_private.h"
27	#include "../drivers/audio/AudioOutputDevice.h"
28	#include "../common/RTMath.h"
29
30	#include <map>
31
32	#define DEFAULT_FX_SEND_LEVEL 0.0f
33
34	namespace LinuxSampler {
35
36	FxSend::FxSend(EngineChannel* pEngineChannel, uint8_t MidiCtrl, String Name) throw (Exception) {
37	this->pEngineChannel = pEngineChannel;
38	AudioOutputDevice* pDevice = pEngineChannel->GetAudioOutputDevice();
39	const int iChanOffset = (pDevice) ? pDevice->ChannelCount() - pEngineChannel->Channels() : 0;
40	for (int i = 0; i < pEngineChannel->Channels(); i++) {
41	const int iDestination = iChanOffset + i;
42	Routing.push_back(iDestination);
43	}
44	SetMidiController(MidiCtrl);
45	sName = Name;
46
47	// create an EngineChannel unique ID for this FxSend instance
48	if (!pEngineChannel->GetFxSendCount()) iId = 0;
49	else {
50	// get the highest existing map ID
51	uint highestIndex = 0;
52	for (uint i = 0; i < pEngineChannel->GetFxSendCount(); i++)
53	highestIndex = RTMath::Max(highestIndex, pEngineChannel->GetFxSend(i)->Id());
54	// check if we reached the index limit
55	if (highestIndex + 1 < highestIndex) {
56	// search for an unoccupied map ID starting from 0
57	for (uint i = 0; i < highestIndex; i++) {
58	bool bOccupied = false;
59	for (uint j = 0; j < pEngineChannel->GetFxSendCount(); j++) {
60	if (pEngineChannel->GetFxSend(j)->Id() == i) {
61	bOccupied = true;
62	break;
63	}
64	}
65	if (!bOccupied) {
66	iId = i;
67	goto __done;
68	}
69	}
70	throw Exception("Internal error: could not find unoccupied FxSend ID.");
71	}
72	iId = highestIndex + 1;
73	}
74	__done:
75
76	fLevel = DEFAULT_FX_SEND_LEVEL;
77	}
78
79	int FxSend::DestinationChannel(int SrcChan) {
80	if (SrcChan >= pEngineChannel->Channels()) return -1;
81	return Routing[SrcChan];
82	}
83
84	void FxSend::SetDestinationChannel(int SrcChan, int DstChan) throw (Exception) {
85	if (SrcChan < 0 \|\| SrcChan >= pEngineChannel->Channels())
86	throw Exception("Cannot alter FxSend routing, source channel out of bounds");
87	AudioOutputDevice* pDevice = pEngineChannel->GetAudioOutputDevice();
88	if (pDevice) {
89	if (DstChan < 0 \|\| DstChan >= pDevice->ChannelCount())
90	throw Exception("Cannot alter FxSend routing, destination channel out of bounds");
91	} else { // no audio device assigned yet
92	if (DstChan < 0 \|\| DstChan >= pEngineChannel->Channels())
93	throw Exception(
94	"there is no audio device yet, so you cannot set a "
95	"FxSend destination channel higher than the engine "
96	"channel's amount of channels"
97	);
98	}
99	Routing[SrcChan] = DstChan;
100	}
101
102	void FxSend::UpdateChannels() {
103	if (Routing.size() > pEngineChannel->Channels()) {
104	// add routings with default destinations
105	AudioOutputDevice* pDevice = pEngineChannel->GetAudioOutputDevice();
106	const int iChanOffset = (pDevice) ? pDevice->ChannelCount() - pEngineChannel->Channels() : 0;
107	for (int i = Routing.size(); i < pEngineChannel->Channels(); i++) {
108	const int iDestination = iChanOffset + i;
109	Routing.push_back(iDestination);
110	}
111	} else if (Routing.size() < pEngineChannel->Channels()) {
112	// shrink routing vector
113	Routing.resize(pEngineChannel->Channels());
114	}
115	}
116
117	float FxSend::Level() {
118	return fLevel;
119	}
120
121	void FxSend::SetLevel(float f) {
122	if(fLevel == f) return;
123	fLevel = f;
124	SetInfoChanged(true);
125	}
126
127	void FxSend::SetLevel(uint8_t iMidiValue) {
128	fLevel = float(iMidiValue & 0x7f) / 127.0f;
129	SetInfoChanged(true);
130	}
131
132	void FxSend::Reset() {
133	SetLevel(DEFAULT_FX_SEND_LEVEL);
134	}
135
136	uint8_t FxSend::MidiController() {
137	return MidiFxSendController;
138	}
139
140	void FxSend::SetMidiController(uint8_t MidiCtrl) throw (Exception) {
141	if (MidiCtrl >> 7)
142	throw Exception("Invalid MIDI controller " + ToString((int)MidiCtrl));
143	MidiFxSendController = MidiCtrl;
144	}
145
146	String FxSend::Name() {
147	return sName;
148	}
149
150	void FxSend::SetName(String Name) {
151	sName = Name;
152	}
153
154	uint FxSend::Id() {
155	return iId;
156	}
157
158	void FxSend::SetInfoChanged(bool b) {
159	bInfoChanged = b;
160	}
161
162	bool FxSend::IsInfoChanged() {
163	return bInfoChanged;
164	}
165
166	} // namespace LinuxSampler