release0_4_0/src/Sampler.cpp

/***************************************************************************
 *                                                                         *
 *   LinuxSampler - modular, streaming capable sampler                     *
 *                                                                         *
 *   Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck   *
 *   Copyright (C) 2005, 2006 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 <sstream>

#include "Sampler.h"

#include "engines/EngineFactory.h"
#include "engines/EngineChannelFactory.h"
#include "drivers/audio/AudioOutputDeviceFactory.h"
#include "drivers/midi/MidiInputDeviceFactory.h"
#include "network/lscpserver.h"

namespace LinuxSampler {

    // ******************************************************************
    // * SamplerChannel

    SamplerChannel::SamplerChannel(Sampler* pS) {
        pSampler           = pS;
        pEngineChannel     = NULL;
        pAudioOutputDevice = NULL;
        pMidiInputDevice   = NULL;
        iMidiPort          = 0;
        midiChannel        = midi_chan_all;
        iIndex             = -1;
    }

    SamplerChannel::~SamplerChannel() {
        if (pEngineChannel) {
            Engine* engine = pEngineChannel->GetEngine();
            if (pAudioOutputDevice) pAudioOutputDevice->Disconnect(engine);

            MidiInputPort* pMidiInputPort = (pEngineChannel) ? pEngineChannel->GetMidiInputPort() : __GetMidiInputDevicePort(GetMidiInputChannel());
            if (pMidiInputPort) pMidiInputPort->Disconnect(pEngineChannel);
            if (pEngineChannel) {
                if (pAudioOutputDevice) pEngineChannel->DisconnectAudioOutputDevice();
                EngineChannelFactory::Destroy(pEngineChannel);

                // reconnect engine if it still exists
                const std::set<Engine*>& engines = EngineFactory::EngineInstances();
                if (engines.find(engine) != engines.end()) pAudioOutputDevice->Connect(engine);
            }
        }
    }

    void SamplerChannel::SetEngineType(String EngineType) throw (Exception) {
        dmsg(2,("SamplerChannel: Assigning engine type..."));

        // create new engine channel
        EngineChannel* pNewEngineChannel = EngineChannelFactory::Create(EngineType);
        if (!pNewEngineChannel) throw Exception("Unknown engine type");

        //FIXME: hack to allow fast retrieval of engine channel's sampler channel index
        pNewEngineChannel->iSamplerChannelIndex = Index();

        // dereference midi input port.
        MidiInputPort* pMidiInputPort = __GetMidiInputDevicePort(GetMidiInputPort());
        // disconnect old engine channel
        if (pEngineChannel) {
            Engine* engine = pEngineChannel->GetEngine();
            if (pAudioOutputDevice) pAudioOutputDevice->Disconnect(engine);

            if (pMidiInputPort) pMidiInputPort->Disconnect(pEngineChannel);
            if (pAudioOutputDevice) pEngineChannel->DisconnectAudioOutputDevice();
            EngineChannelFactory::Destroy(pEngineChannel);

            // reconnect engine if it still exists
            const std::set<Engine*>& engines = EngineFactory::EngineInstances();
            if (engines.find(engine) != engines.end()) pAudioOutputDevice->Connect(engine);
        }

        // connect new engine channel
        if (pAudioOutputDevice) {
            pNewEngineChannel->Connect(pAudioOutputDevice);
            pAudioOutputDevice->Connect(pNewEngineChannel->GetEngine());
        }
        if (pMidiInputPort) pMidiInputPort->Connect(pNewEngineChannel, GetMidiInputChannel());
        pEngineChannel = pNewEngineChannel;

        // from now on get MIDI device and port from EngineChannel object
        this->pMidiInputDevice = NULL;
        this->iMidiPort        = 0;

        pEngineChannel->StatusChanged(true);

        dmsg(2,("OK\n"));
    }

    void SamplerChannel::SetAudioOutputDevice(AudioOutputDevice* pDevice) {
        // disconnect old device
        if (pAudioOutputDevice && pEngineChannel) {
            Engine* engine = pEngineChannel->GetEngine();
            pAudioOutputDevice->Disconnect(engine);

            pEngineChannel->DisconnectAudioOutputDevice();

            // reconnect engine if it still exists
            const std::set<Engine*>& engines = EngineFactory::EngineInstances();
            if (engines.find(engine) != engines.end()) pAudioOutputDevice->Connect(engine);
        }

        // connect new device
        pAudioOutputDevice = pDevice;
        if (pEngineChannel) {
            pEngineChannel->Connect(pAudioOutputDevice);
            pAudioOutputDevice->Connect(pEngineChannel->GetEngine());
        }
    }

    void SamplerChannel::SetMidiInputDevice(MidiInputDevice* pDevice) {
       SetMidiInput(pDevice, 0, GetMidiInputChannel());
    }

    void SamplerChannel::SetMidiInputPort(int MidiPort) {
       SetMidiInput(GetMidiInputDevice(), MidiPort, GetMidiInputChannel());
    }

    void SamplerChannel::SetMidiInputChannel(midi_chan_t MidiChannel) {
       SetMidiInput(GetMidiInputDevice(), GetMidiInputPort(), MidiChannel);
    }

    void SamplerChannel::SetMidiInput(MidiInputDevice* pDevice, int iMidiPort, midi_chan_t MidiChannel) {
        if (!pDevice) throw Exception("No MIDI input device assigned.");

        // get old and new midi input port
        MidiInputPort* pOldMidiInputPort = __GetMidiInputDevicePort(GetMidiInputPort());
        MidiInputPort* pNewMidiInputPort = pDevice->GetPort(iMidiPort);

        // disconnect old device port
        if (pOldMidiInputPort && pEngineChannel) pOldMidiInputPort->Disconnect(pEngineChannel);
        // remember new device, port and channel if not engine channel yet created
        if (!pEngineChannel) {
            this->pMidiInputDevice = pDevice;
            this->iMidiPort        = iMidiPort;
            this->midiChannel      = MidiChannel;
        }

        // connect new device port
        if (pNewMidiInputPort && pEngineChannel) pNewMidiInputPort->Connect(pEngineChannel, MidiChannel);
        // Ooops.
        if (pNewMidiInputPort == NULL)
            throw Exception("There is no MIDI input port with index " + ToString(iMidiPort) + ".");
    }

    EngineChannel* SamplerChannel::GetEngineChannel() {
        return pEngineChannel;
    }

    midi_chan_t SamplerChannel::GetMidiInputChannel() {
        if (pEngineChannel) this->midiChannel = pEngineChannel->MidiChannel();
        return this->midiChannel;
    }

    int SamplerChannel::GetMidiInputPort() {
        MidiInputPort* pMidiInputPort = (pEngineChannel) ? pEngineChannel->GetMidiInputPort() : NULL;
        if (pMidiInputPort) this->iMidiPort = (int) pMidiInputPort->GetPortNumber();
        return iMidiPort;
    }

    AudioOutputDevice* SamplerChannel::GetAudioOutputDevice() {
        return pAudioOutputDevice;
    }

    MidiInputDevice* SamplerChannel::GetMidiInputDevice() {
        if (pEngineChannel)
            pMidiInputDevice = (pEngineChannel->GetMidiInputPort()) ? pEngineChannel->GetMidiInputPort()->GetDevice() : NULL;
        return pMidiInputDevice;
    }

    uint SamplerChannel::Index() {
        if (iIndex >= 0) return iIndex;

        Sampler::SamplerChannelMap::iterator iter = pSampler->mSamplerChannels.begin();
        for (; iter != pSampler->mSamplerChannels.end(); iter++) {
            if (iter->second == this) {
                iIndex = iter->first;
                return iIndex;
            }
        }

        throw Exception("Internal error: SamplerChannel index not found");
    }

    MidiInputPort* SamplerChannel::__GetMidiInputDevicePort(int iMidiPort) {
        MidiInputPort* pMidiInputPort = NULL;
        MidiInputDevice* pMidiInputDevice = GetMidiInputDevice();
        if (pMidiInputDevice)
            pMidiInputPort = pMidiInputDevice->GetPort(iMidiPort);
        return pMidiInputPort;
    }


    // ******************************************************************
    // * Sampler

    Sampler::Sampler() {
    }

    Sampler::~Sampler() {
        Reset();
    }

    uint Sampler::SamplerChannels() {
        return mSamplerChannels.size();
    }

    SamplerChannel* Sampler::AddSamplerChannel() {
        // if there's no sampler channel yet
        if (!mSamplerChannels.size()) {
            SamplerChannel* pChannel = new SamplerChannel(this);
            mSamplerChannels[0] = pChannel;
            LSCPServer::SendLSCPNotify(LSCPEvent(LSCPEvent::event_channel_count, 1));
            return pChannel;
        }

        // get the highest used sampler channel index
        uint lastIndex = (--(mSamplerChannels.end()))->first;

        // check if we reached the index limit
        if (lastIndex + 1 < lastIndex) {
            // search for an unoccupied sampler channel index starting from 0
            for (uint i = 0; i < lastIndex; i++) {
                if (mSamplerChannels.find(i) != mSamplerChannels.end()) continue;
                // we found an unused index, so insert the new channel there
                SamplerChannel* pChannel = new SamplerChannel(this);
                mSamplerChannels[i] = pChannel;
                LSCPServer::SendLSCPNotify(LSCPEvent(LSCPEvent::event_channel_count, i));
                return pChannel;
            }
            throw Exception("Internal error: could not find unoccupied sampler channel index.");
        }

        // we have not reached the index limit so we just add the channel past the highest index
        SamplerChannel* pChannel = new SamplerChannel(this);
        mSamplerChannels[lastIndex + 1] = pChannel;
        LSCPServer::SendLSCPNotify(LSCPEvent(LSCPEvent::event_channel_count, lastIndex + 1));
        return pChannel;
    }

    SamplerChannel* Sampler::GetSamplerChannel(uint uiSamplerChannel) {
        return (mSamplerChannels.find(uiSamplerChannel) != mSamplerChannels.end()) ? mSamplerChannels[uiSamplerChannel] : NULL;
    }

    std::map<uint, SamplerChannel*> Sampler::GetSamplerChannels() {
        return mSamplerChannels;
    }

    void Sampler::RemoveSamplerChannel(SamplerChannel* pSamplerChannel) {
        SamplerChannelMap::iterator iterChan = mSamplerChannels.begin();
        for (; iterChan != mSamplerChannels.end(); iterChan++) {
            if (iterChan->second == pSamplerChannel) {
                mSamplerChannels.erase(iterChan);
                delete pSamplerChannel;
                LSCPServer::SendLSCPNotify(LSCPEvent(LSCPEvent::event_channel_count, mSamplerChannels.size()));
                return;
            }
        }
    }

    void Sampler::RemoveSamplerChannel(uint uiSamplerChannel) {
        SamplerChannel* pChannel = GetSamplerChannel(uiSamplerChannel);
        if (!pChannel) return;
        RemoveSamplerChannel(pChannel);
    }

    std::vector<String> Sampler::AvailableAudioOutputDrivers() {
        return AudioOutputDeviceFactory::AvailableDrivers();
    }

    std::vector<String> Sampler::AvailableMidiInputDrivers() {
        return MidiInputDeviceFactory::AvailableDrivers();
    }

    std::vector<String> Sampler::AvailableEngineTypes() {
        return EngineFactory::AvailableEngineTypes();
    }

    AudioOutputDevice* Sampler::CreateAudioOutputDevice(String AudioDriver, std::map<String,String> Parameters) throw (Exception) {
        // create new device
        AudioOutputDevice* pDevice = AudioOutputDeviceFactory::Create(AudioDriver, Parameters);

        // add new audio device to the audio device list
        for (uint i = 0; ; i++) { // seek for a free place starting from the beginning
            if (!mAudioOutputDevices[i]) {
                mAudioOutputDevices[i] = pDevice;
                break;
            }
        }

        return pDevice;
    }

    uint Sampler::AudioOutputDevices() {
        return mAudioOutputDevices.size();
    }

    uint Sampler::MidiInputDevices() {
        return mMidiInputDevices.size();
    }

    std::map<uint, AudioOutputDevice*> Sampler::GetAudioOutputDevices() {
        return mAudioOutputDevices;
    }

    std::map<uint, MidiInputDevice*> Sampler::GetMidiInputDevices() {
        return mMidiInputDevices;
    }

    void Sampler::DestroyAudioOutputDevice(AudioOutputDevice* pDevice) throw (Exception) {
        AudioOutputDeviceMap::iterator iter = mAudioOutputDevices.begin();
        for (; iter != mAudioOutputDevices.end(); iter++) {
            if (iter->second == pDevice) {
                // check if there are still sampler engines connected to this device
                for (uint i = 0; i < SamplerChannels(); i++)
                    if (GetSamplerChannel(i)->GetAudioOutputDevice() == pDevice) throw Exception("Sampler channel " + ToString(i) + " is still connected to the audio output device.");

                // disable device
                pDevice->Stop();

                // remove device from the device list
                mAudioOutputDevices.erase(iter);

                // destroy and free device from memory
                delete pDevice;

                break;
            }
        }
    }

    void Sampler::DestroyMidiInputDevice(MidiInputDevice* pDevice) throw (Exception) {
        MidiInputDeviceMap::iterator iter = mMidiInputDevices.begin();
        for (; iter != mMidiInputDevices.end(); iter++) {
            if (iter->second == pDevice) {
                // check if there are still sampler engines connected to this device
                for (uint i = 0; i < SamplerChannels(); i++)
                    if (GetSamplerChannel(i)->GetMidiInputDevice() == pDevice) throw Exception("Sampler channel " + ToString(i) + " is still connected to the midi input device.");

                // disable device
                pDevice->StopListen();

                // remove device from the device list
                mMidiInputDevices.erase(iter);

                // destroy and free device from memory
                delete pDevice;

                break;
            }
        }
    }

    MidiInputDevice* Sampler::CreateMidiInputDevice(String MidiDriver, std::map<String,String> Parameters) throw (Exception) {
        // create new device
        MidiInputDevice* pDevice = MidiInputDeviceFactory::Create(MidiDriver, Parameters, this);

        // add new device to the midi device list
        for (uint i = 0; ; i++) { // seek for a free place starting from the beginning
                if (!mMidiInputDevices[i]) {
                        mMidiInputDevices[i] = pDevice;
                        break;
                }
        }

        return pDevice;
    }

    int Sampler::GetVoiceCount() {
        int count = 0;
        std::set<Engine*>::iterator it = EngineFactory::EngineInstances().begin();

        for(; it != EngineFactory::EngineInstances().end(); it++) {
            count += (*it)->VoiceCount();
        }

        return count;
    }

    void Sampler::Reset() {
        // delete sampler channels
        try {
            while (true) {
                    SamplerChannelMap::iterator iter = mSamplerChannels.begin();
                    if (iter == mSamplerChannels.end()) break;
                    RemoveSamplerChannel(iter->second);
            }
        }
        catch(...) {
            std::cerr << "Sampler::Reset(): Exception occured while trying to delete all sampler channels, exiting.\n" << std::flush;
            exit(EXIT_FAILURE);
        }

        // delete midi input devices
        try {
            while (true) {
                    MidiInputDeviceMap::iterator iter = mMidiInputDevices.begin();
                    if (iter == mMidiInputDevices.end()) break;
                    DestroyMidiInputDevice(iter->second);
            }
        }
        catch(...) {
            std::cerr << "Sampler::Reset(): Exception occured while trying to delete all MIDI input devices, exiting.\n" << std::flush;
            exit(EXIT_FAILURE);
        }

        // delete audio output devices
        try {
            while (true) {
                    AudioOutputDeviceMap::iterator iter = mAudioOutputDevices.begin();
                    if (iter == mAudioOutputDevices.end()) break;
                    DestroyAudioOutputDevice(iter->second);
            }
        }
        catch(...) {
            std::cerr << "Sampler::Reset(): Exception occured while trying to delete all audio output devices, exiting.\n" << std::flush;
            exit(EXIT_FAILURE);
        }
    }

} // 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, 2006 Christian Schoenebeck *
7	* *
8	* This program 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 program 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 program; 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 <sstream>
25
26	#include "Sampler.h"
27
28	#include "engines/EngineFactory.h"
29	#include "engines/EngineChannelFactory.h"
30	#include "drivers/audio/AudioOutputDeviceFactory.h"
31	#include "drivers/midi/MidiInputDeviceFactory.h"
32	#include "network/lscpserver.h"
33
34	namespace LinuxSampler {
35
36	// ******************************************************************
37	// * SamplerChannel
38
39	SamplerChannel::SamplerChannel(Sampler* pS) {
40	pSampler = pS;
41	pEngineChannel = NULL;
42	pAudioOutputDevice = NULL;
43	pMidiInputDevice = NULL;
44	iMidiPort = 0;
45	midiChannel = midi_chan_all;
46	iIndex = -1;
47	}
48
49	SamplerChannel::~SamplerChannel() {
50	if (pEngineChannel) {
51	Engine* engine = pEngineChannel->GetEngine();
52	if (pAudioOutputDevice) pAudioOutputDevice->Disconnect(engine);
53
54	MidiInputPort* pMidiInputPort = (pEngineChannel) ? pEngineChannel->GetMidiInputPort() : __GetMidiInputDevicePort(GetMidiInputChannel());
55	if (pMidiInputPort) pMidiInputPort->Disconnect(pEngineChannel);
56	if (pEngineChannel) {
57	if (pAudioOutputDevice) pEngineChannel->DisconnectAudioOutputDevice();
58	EngineChannelFactory::Destroy(pEngineChannel);
59
60	// reconnect engine if it still exists
61	const std::set<Engine*>& engines = EngineFactory::EngineInstances();
62	if (engines.find(engine) != engines.end()) pAudioOutputDevice->Connect(engine);
63	}
64	}
65	}
66
67	void SamplerChannel::SetEngineType(String EngineType) throw (Exception) {
68	dmsg(2,("SamplerChannel: Assigning engine type..."));
69
70	// create new engine channel
71	EngineChannel* pNewEngineChannel = EngineChannelFactory::Create(EngineType);
72	if (!pNewEngineChannel) throw Exception("Unknown engine type");
73
74	//FIXME: hack to allow fast retrieval of engine channel's sampler channel index
75	pNewEngineChannel->iSamplerChannelIndex = Index();
76
77	// dereference midi input port.
78	MidiInputPort* pMidiInputPort = __GetMidiInputDevicePort(GetMidiInputPort());
79	// disconnect old engine channel
80	if (pEngineChannel) {
81	Engine* engine = pEngineChannel->GetEngine();
82	if (pAudioOutputDevice) pAudioOutputDevice->Disconnect(engine);
83
84	if (pMidiInputPort) pMidiInputPort->Disconnect(pEngineChannel);
85	if (pAudioOutputDevice) pEngineChannel->DisconnectAudioOutputDevice();
86	EngineChannelFactory::Destroy(pEngineChannel);
87
88	// reconnect engine if it still exists
89	const std::set<Engine*>& engines = EngineFactory::EngineInstances();
90	if (engines.find(engine) != engines.end()) pAudioOutputDevice->Connect(engine);
91	}
92
93	// connect new engine channel
94	if (pAudioOutputDevice) {
95	pNewEngineChannel->Connect(pAudioOutputDevice);
96	pAudioOutputDevice->Connect(pNewEngineChannel->GetEngine());
97	}
98	if (pMidiInputPort) pMidiInputPort->Connect(pNewEngineChannel, GetMidiInputChannel());
99	pEngineChannel = pNewEngineChannel;
100
101	// from now on get MIDI device and port from EngineChannel object
102	this->pMidiInputDevice = NULL;
103	this->iMidiPort = 0;
104
105	pEngineChannel->StatusChanged(true);
106
107	dmsg(2,("OK\n"));
108	}
109
110	void SamplerChannel::SetAudioOutputDevice(AudioOutputDevice* pDevice) {
111	// disconnect old device
112	if (pAudioOutputDevice && pEngineChannel) {
113	Engine* engine = pEngineChannel->GetEngine();
114	pAudioOutputDevice->Disconnect(engine);
115
116	pEngineChannel->DisconnectAudioOutputDevice();
117
118	// reconnect engine if it still exists
119	const std::set<Engine*>& engines = EngineFactory::EngineInstances();
120	if (engines.find(engine) != engines.end()) pAudioOutputDevice->Connect(engine);
121	}
122
123	// connect new device
124	pAudioOutputDevice = pDevice;
125	if (pEngineChannel) {
126	pEngineChannel->Connect(pAudioOutputDevice);
127	pAudioOutputDevice->Connect(pEngineChannel->GetEngine());
128	}
129	}
130
131	void SamplerChannel::SetMidiInputDevice(MidiInputDevice* pDevice) {
132	SetMidiInput(pDevice, 0, GetMidiInputChannel());
133	}
134
135	void SamplerChannel::SetMidiInputPort(int MidiPort) {
136	SetMidiInput(GetMidiInputDevice(), MidiPort, GetMidiInputChannel());
137	}
138
139	void SamplerChannel::SetMidiInputChannel(midi_chan_t MidiChannel) {
140	SetMidiInput(GetMidiInputDevice(), GetMidiInputPort(), MidiChannel);
141	}
142
143	void SamplerChannel::SetMidiInput(MidiInputDevice* pDevice, int iMidiPort, midi_chan_t MidiChannel) {
144	if (!pDevice) throw Exception("No MIDI input device assigned.");
145
146	// get old and new midi input port
147	MidiInputPort* pOldMidiInputPort = __GetMidiInputDevicePort(GetMidiInputPort());
148	MidiInputPort* pNewMidiInputPort = pDevice->GetPort(iMidiPort);
149
150	// disconnect old device port
151	if (pOldMidiInputPort && pEngineChannel) pOldMidiInputPort->Disconnect(pEngineChannel);
152	// remember new device, port and channel if not engine channel yet created
153	if (!pEngineChannel) {
154	this->pMidiInputDevice = pDevice;
155	this->iMidiPort = iMidiPort;
156	this->midiChannel = MidiChannel;
157	}
158
159	// connect new device port
160	if (pNewMidiInputPort && pEngineChannel) pNewMidiInputPort->Connect(pEngineChannel, MidiChannel);
161	// Ooops.
162	if (pNewMidiInputPort == NULL)
163	throw Exception("There is no MIDI input port with index " + ToString(iMidiPort) + ".");
164	}
165
166	EngineChannel* SamplerChannel::GetEngineChannel() {
167	return pEngineChannel;
168	}
169
170	midi_chan_t SamplerChannel::GetMidiInputChannel() {
171	if (pEngineChannel) this->midiChannel = pEngineChannel->MidiChannel();
172	return this->midiChannel;
173	}
174
175	int SamplerChannel::GetMidiInputPort() {
176	MidiInputPort* pMidiInputPort = (pEngineChannel) ? pEngineChannel->GetMidiInputPort() : NULL;
177	if (pMidiInputPort) this->iMidiPort = (int) pMidiInputPort->GetPortNumber();
178	return iMidiPort;
179	}
180
181	AudioOutputDevice* SamplerChannel::GetAudioOutputDevice() {
182	return pAudioOutputDevice;
183	}
184
185	MidiInputDevice* SamplerChannel::GetMidiInputDevice() {
186	if (pEngineChannel)
187	pMidiInputDevice = (pEngineChannel->GetMidiInputPort()) ? pEngineChannel->GetMidiInputPort()->GetDevice() : NULL;
188	return pMidiInputDevice;
189	}
190
191	uint SamplerChannel::Index() {
192	if (iIndex >= 0) return iIndex;
193
194	Sampler::SamplerChannelMap::iterator iter = pSampler->mSamplerChannels.begin();
195	for (; iter != pSampler->mSamplerChannels.end(); iter++) {
196	if (iter->second == this) {
197	iIndex = iter->first;
198	return iIndex;
199	}
200	}
201
202	throw Exception("Internal error: SamplerChannel index not found");
203	}
204
205	MidiInputPort* SamplerChannel::__GetMidiInputDevicePort(int iMidiPort) {
206	MidiInputPort* pMidiInputPort = NULL;
207	MidiInputDevice* pMidiInputDevice = GetMidiInputDevice();
208	if (pMidiInputDevice)
209	pMidiInputPort = pMidiInputDevice->GetPort(iMidiPort);
210	return pMidiInputPort;
211	}
212
213
214
215	// ******************************************************************
216	// * Sampler
217
218	Sampler::Sampler() {
219	}
220
221	Sampler::~Sampler() {
222	Reset();
223	}
224
225	uint Sampler::SamplerChannels() {
226	return mSamplerChannels.size();
227	}
228
229	SamplerChannel* Sampler::AddSamplerChannel() {
230	// if there's no sampler channel yet
231	if (!mSamplerChannels.size()) {
232	SamplerChannel* pChannel = new SamplerChannel(this);
233	mSamplerChannels[0] = pChannel;
234	LSCPServer::SendLSCPNotify(LSCPEvent(LSCPEvent::event_channel_count, 1));
235	return pChannel;
236	}
237
238	// get the highest used sampler channel index
239	uint lastIndex = (--(mSamplerChannels.end()))->first;
240
241	// check if we reached the index limit
242	if (lastIndex + 1 < lastIndex) {
243	// search for an unoccupied sampler channel index starting from 0
244	for (uint i = 0; i < lastIndex; i++) {
245	if (mSamplerChannels.find(i) != mSamplerChannels.end()) continue;
246	// we found an unused index, so insert the new channel there
247	SamplerChannel* pChannel = new SamplerChannel(this);
248	mSamplerChannels[i] = pChannel;
249	LSCPServer::SendLSCPNotify(LSCPEvent(LSCPEvent::event_channel_count, i));
250	return pChannel;
251	}
252	throw Exception("Internal error: could not find unoccupied sampler channel index.");
253	}
254
255	// we have not reached the index limit so we just add the channel past the highest index
256	SamplerChannel* pChannel = new SamplerChannel(this);
257	mSamplerChannels[lastIndex + 1] = pChannel;
258	LSCPServer::SendLSCPNotify(LSCPEvent(LSCPEvent::event_channel_count, lastIndex + 1));
259	return pChannel;
260	}
261
262	SamplerChannel* Sampler::GetSamplerChannel(uint uiSamplerChannel) {
263	return (mSamplerChannels.find(uiSamplerChannel) != mSamplerChannels.end()) ? mSamplerChannels[uiSamplerChannel] : NULL;
264	}
265
266	std::map<uint, SamplerChannel*> Sampler::GetSamplerChannels() {
267	return mSamplerChannels;
268	}
269
270	void Sampler::RemoveSamplerChannel(SamplerChannel* pSamplerChannel) {
271	SamplerChannelMap::iterator iterChan = mSamplerChannels.begin();
272	for (; iterChan != mSamplerChannels.end(); iterChan++) {
273	if (iterChan->second == pSamplerChannel) {
274	mSamplerChannels.erase(iterChan);
275	delete pSamplerChannel;
276	LSCPServer::SendLSCPNotify(LSCPEvent(LSCPEvent::event_channel_count, mSamplerChannels.size()));
277	return;
278	}
279	}
280	}
281
282	void Sampler::RemoveSamplerChannel(uint uiSamplerChannel) {
283	SamplerChannel* pChannel = GetSamplerChannel(uiSamplerChannel);
284	if (!pChannel) return;
285	RemoveSamplerChannel(pChannel);
286	}
287
288	std::vector<String> Sampler::AvailableAudioOutputDrivers() {
289	return AudioOutputDeviceFactory::AvailableDrivers();
290	}
291
292	std::vector<String> Sampler::AvailableMidiInputDrivers() {
293	return MidiInputDeviceFactory::AvailableDrivers();
294	}
295
296	std::vector<String> Sampler::AvailableEngineTypes() {
297	return EngineFactory::AvailableEngineTypes();
298	}
299
300	AudioOutputDevice* Sampler::CreateAudioOutputDevice(String AudioDriver, std::map<String,String> Parameters) throw (Exception) {
301	// create new device
302	AudioOutputDevice* pDevice = AudioOutputDeviceFactory::Create(AudioDriver, Parameters);
303
304	// add new audio device to the audio device list
305	for (uint i = 0; ; i++) { // seek for a free place starting from the beginning
306	if (!mAudioOutputDevices[i]) {
307	mAudioOutputDevices[i] = pDevice;
308	break;
309	}
310	}
311
312	return pDevice;
313	}
314
315	uint Sampler::AudioOutputDevices() {
316	return mAudioOutputDevices.size();
317	}
318
319	uint Sampler::MidiInputDevices() {
320	return mMidiInputDevices.size();
321	}
322
323	std::map<uint, AudioOutputDevice*> Sampler::GetAudioOutputDevices() {
324	return mAudioOutputDevices;
325	}
326
327	std::map<uint, MidiInputDevice*> Sampler::GetMidiInputDevices() {
328	return mMidiInputDevices;
329	}
330
331	void Sampler::DestroyAudioOutputDevice(AudioOutputDevice* pDevice) throw (Exception) {
332	AudioOutputDeviceMap::iterator iter = mAudioOutputDevices.begin();
333	for (; iter != mAudioOutputDevices.end(); iter++) {
334	if (iter->second == pDevice) {
335	// check if there are still sampler engines connected to this device
336	for (uint i = 0; i < SamplerChannels(); i++)
337	if (GetSamplerChannel(i)->GetAudioOutputDevice() == pDevice) throw Exception("Sampler channel " + ToString(i) + " is still connected to the audio output device.");
338
339	// disable device
340	pDevice->Stop();
341
342	// remove device from the device list
343	mAudioOutputDevices.erase(iter);
344
345	// destroy and free device from memory
346	delete pDevice;
347
348	break;
349	}
350	}
351	}
352
353	void Sampler::DestroyMidiInputDevice(MidiInputDevice* pDevice) throw (Exception) {
354	MidiInputDeviceMap::iterator iter = mMidiInputDevices.begin();
355	for (; iter != mMidiInputDevices.end(); iter++) {
356	if (iter->second == pDevice) {
357	// check if there are still sampler engines connected to this device
358	for (uint i = 0; i < SamplerChannels(); i++)
359	if (GetSamplerChannel(i)->GetMidiInputDevice() == pDevice) throw Exception("Sampler channel " + ToString(i) + " is still connected to the midi input device.");
360
361	// disable device
362	pDevice->StopListen();
363
364	// remove device from the device list
365	mMidiInputDevices.erase(iter);
366
367	// destroy and free device from memory
368	delete pDevice;
369
370	break;
371	}
372	}
373	}
374
375	MidiInputDevice* Sampler::CreateMidiInputDevice(String MidiDriver, std::map<String,String> Parameters) throw (Exception) {
376	// create new device
377	MidiInputDevice* pDevice = MidiInputDeviceFactory::Create(MidiDriver, Parameters, this);
378
379	// add new device to the midi device list
380	for (uint i = 0; ; i++) { // seek for a free place starting from the beginning
381	if (!mMidiInputDevices[i]) {
382	mMidiInputDevices[i] = pDevice;
383	break;
384	}
385	}
386
387	return pDevice;
388	}
389
390	int Sampler::GetVoiceCount() {
391	int count = 0;
392	std::set<Engine*>::iterator it = EngineFactory::EngineInstances().begin();
393
394	for(; it != EngineFactory::EngineInstances().end(); it++) {
395	count += (*it)->VoiceCount();
396	}
397
398	return count;
399	}
400
401	void Sampler::Reset() {
402	// delete sampler channels
403	try {
404	while (true) {
405	SamplerChannelMap::iterator iter = mSamplerChannels.begin();
406	if (iter == mSamplerChannels.end()) break;
407	RemoveSamplerChannel(iter->second);
408	}
409	}
410	catch(...) {
411	std::cerr << "Sampler::Reset(): Exception occured while trying to delete all sampler channels, exiting.\n" << std::flush;
412	exit(EXIT_FAILURE);
413	}
414
415	// delete midi input devices
416	try {
417	while (true) {
418	MidiInputDeviceMap::iterator iter = mMidiInputDevices.begin();
419	if (iter == mMidiInputDevices.end()) break;
420	DestroyMidiInputDevice(iter->second);
421	}
422	}
423	catch(...) {
424	std::cerr << "Sampler::Reset(): Exception occured while trying to delete all MIDI input devices, exiting.\n" << std::flush;
425	exit(EXIT_FAILURE);
426	}
427
428	// delete audio output devices
429	try {
430	while (true) {
431	AudioOutputDeviceMap::iterator iter = mAudioOutputDevices.begin();
432	if (iter == mAudioOutputDevices.end()) break;
433	DestroyAudioOutputDevice(iter->second);
434	}
435	}
436	catch(...) {
437	std::cerr << "Sampler::Reset(): Exception occured while trying to delete all audio output devices, exiting.\n" << std::flush;
438	exit(EXIT_FAILURE);
439	}
440	}
441
442	} // namespace LinuxSampler