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/*************************************************************************** |
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* * |
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* Copyright (C) 2008 - 2011 Andreas Persson * |
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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., 51 Franklin St, Fifth Floor, Boston, * |
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* MA 02110-1301 USA * |
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***************************************************************************/ |
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#include <algorithm> |
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#include <cstring> |
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#include <exception> |
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#include <sstream> |
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#include <string> |
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#include "PluginDssi.h" |
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#include "../../engines/AbstractEngineChannel.h" |
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#include "../../engines/EngineChannelFactory.h" |
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namespace { |
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// *************** PluginDssi *************** |
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// * |
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PluginDssi::PluginDssi(unsigned long SampleRate) : |
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RefCount(0) { |
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// As there is no way in DSSI of knowing a max value of the |
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// output buffer size, we set the audio device buffer size to |
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// 128 and let RunSynth call Render in a loop if needed. |
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Init(SampleRate, 128); |
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} |
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|
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PluginDssi* PluginInstance::plugin = 0; |
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PluginInstance::PluginInstance(unsigned long SampleRate) { |
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Out[0] = 0; |
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Out[1] = 0; |
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if (!plugin) { |
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plugin = new PluginDssi(SampleRate); |
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} |
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plugin->RefCount++; |
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pChannel = plugin->global->pSampler->AddSamplerChannel(); |
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pChannel->SetEngineType("gig"); |
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pChannel->SetAudioOutputDevice(plugin->pAudioDevice); |
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if (plugin->RefCount > 1) { |
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plugin->pMidiDevice->AddMidiPort(); |
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plugin->pAudioDevice->AddChannels(2); |
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} |
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int i = plugin->RefCount - 1; |
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pChannel->SetMidiInput(plugin->pMidiDevice, i, LinuxSampler::midi_chan_all); |
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LinuxSampler::AbstractEngineChannel* engineChannel = |
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static_cast<LinuxSampler::AbstractEngineChannel*>(pChannel->GetEngineChannel()); |
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engineChannel->SetOutputChannel(0, i * 2); |
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engineChannel->SetOutputChannel(1, i * 2 + 1); |
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pPort = plugin->pMidiDevice->GetPort(i); |
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pChannelLeft = plugin->pAudioDevice->Channel(i * 2); |
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pChannelRight = plugin->pAudioDevice->Channel(i * 2 + 1); |
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} |
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PluginInstance::~PluginInstance() { |
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if (--plugin->RefCount == 0) { |
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delete plugin; |
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plugin = 0; |
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} else { |
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LinuxSampler::AbstractEngineChannel* engineChannel = |
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static_cast<LinuxSampler::AbstractEngineChannel*>(pChannel->GetEngineChannel()); |
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int oldChannelNumber = engineChannel->OutputChannel(0); |
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plugin->global->pSampler->RemoveSamplerChannel(pChannel); |
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plugin->pMidiDevice->RemoveMidiPort(pPort); |
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plugin->pAudioDevice->RemoveChannel(pChannelLeft); |
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plugin->pAudioDevice->RemoveChannel(pChannelRight); |
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const std::set<LinuxSampler::EngineChannel*>& engineChannels = |
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LinuxSampler::EngineChannelFactory::EngineChannelInstances(); |
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for (std::set<LinuxSampler::EngineChannel*>::iterator i = engineChannels.begin(); |
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i != engineChannels.end() ; ++i) { |
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if ((*i)->GetAudioOutputDevice() == plugin->pAudioDevice) { |
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int channelNumber = (*i)->OutputChannel(0); |
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if (channelNumber > oldChannelNumber) { |
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(*i)->SetOutputChannel(0, channelNumber - 2); |
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(*i)->SetOutputChannel(1, channelNumber - 1); |
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} |
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} |
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} |
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} |
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} |
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void PluginInstance::ConnectPort(unsigned long Port, LADSPA_Data* DataLocation) { |
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if (Port < 2) Out[Port] = DataLocation; |
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} |
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char* PluginInstance::Configure(const char* Key, const char* Value) { |
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dmsg(2, ("linuxsampler: configure Key=%s Value=%s\n", Key, Value)); |
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if (strcmp(Key, "instrument") == 0 && strcmp(Value, "") != 0) { |
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String filename(Value); |
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String::size_type colon = filename.rfind(':'); |
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int instrument = 0; |
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if (colon != String::npos) { |
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std::stringstream(String(filename, colon + 1)) >> instrument; |
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filename.erase(colon); |
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} |
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try { |
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LinuxSampler::EngineChannel* engineChannel = |
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pChannel->GetEngineChannel(); |
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dmsg(2, (" before LoadInstrument\n")); |
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engineChannel->PrepareLoadInstrument(filename.c_str(), |
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instrument); |
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engineChannel->LoadInstrument(); |
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dmsg(2, (" after LoadInstrument\n")); |
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} |
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catch (std::exception& e) { |
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return strdup(e.what()); |
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} |
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} |
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return 0; |
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} |
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inline void PluginInstance::RunMultipleSynths(unsigned long InstanceCount, |
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LADSPA_Handle* Instances, |
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unsigned long SampleCount, |
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snd_seq_event_t** Events, |
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unsigned long* EventCounts) { |
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if (InstanceCount == 0) return; |
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LinuxSampler::AudioOutputDevicePlugin* audioDevice = |
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static_cast<PluginInstance*>(Instances[0])->plugin->pAudioDevice; |
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unsigned eventPosArr[InstanceCount]; |
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for (unsigned long i = 0 ; i < InstanceCount ; i++) eventPosArr[i] = 0; |
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int samplePos = 0; |
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while (SampleCount) { |
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int samples = std::min(SampleCount, 128UL); |
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for (unsigned long i = 0 ; i < InstanceCount ; i++) { |
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PluginInstance* instance = static_cast<PluginInstance*>(Instances[i]); |
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LinuxSampler::MidiInputPort* port = instance->pPort; |
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snd_seq_event_t* events = Events[i]; |
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unsigned& eventPos = eventPosArr[i]; |
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for ( ; eventPos < EventCounts[i] ; eventPos++) { |
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snd_seq_event_t* ev = &events[eventPos]; |
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int time = ev->time.tick - samplePos; |
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if (time >= samples) break; |
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switch (ev->type) { |
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case SND_SEQ_EVENT_CONTROLLER: |
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port->DispatchControlChange(ev->data.control.param, |
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ev->data.control.value, |
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ev->data.control.channel, time); |
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break; |
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case SND_SEQ_EVENT_CHANPRESS: |
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port->DispatchControlChange(128, ev->data.control.value, |
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ev->data.control.channel, time); |
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break; |
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case SND_SEQ_EVENT_PITCHBEND: |
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port->DispatchPitchbend(ev->data.control.value, |
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ev->data.control.channel, time); |
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break; |
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case SND_SEQ_EVENT_NOTEON: |
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port->DispatchNoteOn(ev->data.note.note, |
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ev->data.note.velocity, |
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ev->data.control.channel, time); |
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break; |
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case SND_SEQ_EVENT_NOTEOFF: |
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port->DispatchNoteOff(ev->data.note.note, |
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ev->data.note.velocity, |
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ev->data.control.channel, time); |
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break; |
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case SND_SEQ_EVENT_SYSEX: |
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port->DispatchSysex(ev->data.ext.ptr, ev->data.ext.len); |
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break; |
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} |
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} |
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instance->pChannelLeft->SetBuffer(instance->Out[0] + samplePos); |
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instance->pChannelRight->SetBuffer(instance->Out[1] + samplePos); |
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} |
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audioDevice->Render(samples); |
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samplePos += samples; |
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SampleCount -= samples; |
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} |
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} |
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void PluginInstance::Activate() { |
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dmsg(2, ("linuxsampler: activate instance=%p\n", static_cast<void*>(this))); |
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pPort->DispatchControlChange(123, 0, 0, 0); // all sound off |
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} |
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// *************** LADSPA callback functions *************** |
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// * |
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LADSPA_Handle instantiate(const LADSPA_Descriptor* Descriptor, |
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unsigned long SampleRate) { |
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return new PluginInstance(SampleRate); |
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} |
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void cleanup(LADSPA_Handle Instance) { |
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dmsg(2, ("linuxsampler: cleanup Instance=%p\n", static_cast<void*>(Instance))); |
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delete static_cast<PluginInstance*>(Instance); |
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} |
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void activate(LADSPA_Handle Instance) { |
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static_cast<PluginInstance*>(Instance)->Activate(); |
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} |
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void connect_port(LADSPA_Handle Instance, unsigned long Port, |
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LADSPA_Data* DataLocation) { |
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static_cast<PluginInstance*>(Instance)->ConnectPort(Port, DataLocation); |
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} |
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void run(LADSPA_Handle Instance, unsigned long SampleCount) { |
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return; |
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} |
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// *************** DSSI callback functions *************** |
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// * |
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void run_multiple_synths(unsigned long InstanceCount, |
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LADSPA_Handle* Instances, |
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unsigned long SampleCount, |
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snd_seq_event_t** Events, |
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unsigned long* EventCounts) { |
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PluginInstance::RunMultipleSynths(InstanceCount, Instances, |
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SampleCount, Events, |
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EventCounts); |
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} |
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char* configure(LADSPA_Handle Instance, const char* Key, const char* Value) { |
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return static_cast<PluginInstance*>(Instance)->Configure(Key, Value); |
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} |
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// *************** PluginInfo *************** |
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// * |
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PluginInfo PluginInfo::Instance; |
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PluginInfo::PluginInfo() { |
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Ladspa.UniqueID = 3781; // (received from ladspa.org) |
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Ladspa.Label = "LinuxSampler"; |
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Ladspa.Properties = 0; |
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Ladspa.Name = "LinuxSampler"; |
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Ladspa.Maker = "linuxsampler.org"; |
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Ladspa.Copyright = "(C) 2003,2004 Benno Senoner and Christian Schoenebeck, " |
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"2005-2012 Christian Schoenebeck"; |
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Ladspa.PortCount = 2; |
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Ladspa.ImplementationData = 0; |
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Ladspa.PortDescriptors = PortDescriptors; |
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Ladspa.PortRangeHints = PortRangeHints; |
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Ladspa.PortNames = PortNames; |
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PortDescriptors[0] = LADSPA_PORT_OUTPUT | LADSPA_PORT_AUDIO; |
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PortNames[0] = "Output Left"; |
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PortRangeHints[0].HintDescriptor = 0; |
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PortDescriptors[1] = LADSPA_PORT_OUTPUT | LADSPA_PORT_AUDIO; |
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PortNames[1] = "Output Right"; |
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PortRangeHints[1].HintDescriptor = 0; |
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Ladspa.activate = activate; |
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Ladspa.cleanup = cleanup; |
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Ladspa.connect_port = connect_port; |
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Ladspa.deactivate = 0; |
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Ladspa.instantiate = instantiate; |
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Ladspa.run = run; |
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Ladspa.run_adding = 0; |
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Ladspa.set_run_adding_gain = 0; |
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Dssi.DSSI_API_Version = 1; |
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Dssi.LADSPA_Plugin = &Ladspa; |
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Dssi.configure = configure; |
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Dssi.get_program = 0; |
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Dssi.get_midi_controller_for_port = 0; |
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Dssi.select_program = 0; |
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Dssi.run_synth = 0; |
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Dssi.run_synth_adding = 0; |
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Dssi.run_multiple_synths = run_multiple_synths; |
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Dssi.run_multiple_synths_adding = 0; |
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} |
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} |
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extern "C" { |
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const LADSPA_Descriptor* ladspa_descriptor(unsigned long Index) { |
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dmsg(2, ("linuxsampler: ladspa_descriptor\n")); |
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return Index == 0 ? PluginInfo::LadspaDescriptor() : 0; |
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} |
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const DSSI_Descriptor *dssi_descriptor(unsigned long Index) { |
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dmsg(2, ("linuxsampler: dssi_descriptor\n")); |
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return Index == 0 ? PluginInfo::DssiDescriptor() : 0; |
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} |
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} |