diff plugin/LADSPAPluginInstance.cpp @ 0:da6937383da8

initial import

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/plugin/LADSPAPluginInstance.cpp	Tue Jan 10 16:33:16 2006 +0000
@@ -0,0 +1,418 @@
+/* -*- c-basic-offset: 4 -*-  vi:set ts=8 sts=4 sw=4: */
+
+/*
+    A waveform viewer and audio annotation editor.
+    Chris Cannam, Queen Mary University of London, 2005
+    
+    This is experimental software.  Not for distribution.
+*/
+
+/*
+   This is a modified version of a source file from the 
+   Rosegarden MIDI and audio sequencer and notation editor.
+   This file copyright 2000-2005 Chris Cannam and Richard Bown.
+*/
+
+#include <iostream>
+#include <cassert>
+
+#include "LADSPAPluginInstance.h"
+#include "LADSPAPluginFactory.h"
+
+//#define DEBUG_LADSPA 1
+
+
+LADSPAPluginInstance::LADSPAPluginInstance(RealTimePluginFactory *factory,
+					   int clientId,
+					   QString identifier,
+                                           int position,
+					   unsigned long sampleRate,
+					   size_t blockSize,
+					   int idealChannelCount,
+                                           const LADSPA_Descriptor* descriptor) :
+    RealTimePluginInstance(factory, identifier),
+    m_client(clientId),
+    m_position(position),
+    m_instanceCount(0),
+    m_descriptor(descriptor),
+    m_blockSize(blockSize),
+    m_sampleRate(sampleRate),
+    m_latencyPort(0),
+    m_run(false),
+    m_bypassed(false)
+{
+    init(idealChannelCount);
+
+    m_inputBuffers  = new sample_t*[m_instanceCount * m_audioPortsIn.size()];
+    m_outputBuffers = new sample_t*[m_instanceCount * m_audioPortsOut.size()];
+
+    for (size_t i = 0; i < m_instanceCount * m_audioPortsIn.size(); ++i) {
+	m_inputBuffers[i] = new sample_t[blockSize];
+    }
+    for (size_t i = 0; i < m_instanceCount * m_audioPortsOut.size(); ++i) {
+	m_outputBuffers[i] = new sample_t[blockSize];
+    }
+
+    m_ownBuffers = true;
+
+    instantiate(sampleRate);
+    if (isOK()) {
+	connectPorts();
+	activate();
+    }
+}
+
+LADSPAPluginInstance::LADSPAPluginInstance(RealTimePluginFactory *factory,
+					   int clientId,
+					   QString identifier,
+                                           int position,
+					   unsigned long sampleRate,
+					   size_t blockSize,
+					   sample_t **inputBuffers,
+					   sample_t **outputBuffers,
+                                           const LADSPA_Descriptor* descriptor) :
+    RealTimePluginInstance(factory, identifier),
+    m_client(clientId),
+    m_position(position),
+    m_instanceCount(0),
+    m_descriptor(descriptor),
+    m_blockSize(blockSize),
+    m_inputBuffers(inputBuffers),
+    m_outputBuffers(outputBuffers),
+    m_ownBuffers(false),
+    m_sampleRate(sampleRate),
+    m_latencyPort(0),
+    m_run(false),
+    m_bypassed(false)
+{
+    init();
+
+    instantiate(sampleRate);
+    if (isOK()) {
+	connectPorts();
+	activate();
+    }
+}
+
+
+void
+LADSPAPluginInstance::init(int idealChannelCount)
+{
+#ifdef DEBUG_LADSPA
+    std::cerr << "LADSPAPluginInstance::init(" << idealChannelCount << "): plugin has "
+	      << m_descriptor->PortCount << " ports" << std::endl;
+#endif
+
+    // Discover ports numbers and identities
+    //
+    for (unsigned long i = 0; i < m_descriptor->PortCount; ++i)
+    {
+        if (LADSPA_IS_PORT_AUDIO(m_descriptor->PortDescriptors[i]))
+        {
+            if (LADSPA_IS_PORT_INPUT(m_descriptor->PortDescriptors[i])) {
+#ifdef DEBUG_LADSPA
+		std::cerr << "LADSPAPluginInstance::init: port " << i << " is audio in" << std::endl;
+#endif
+                m_audioPortsIn.push_back(i);
+	    } else {
+#ifdef DEBUG_LADSPA
+		std::cerr << "LADSPAPluginInstance::init: port " << i << " is audio out" << std::endl;
+#endif
+                m_audioPortsOut.push_back(i);
+	    }
+        }
+        else
+        if (LADSPA_IS_PORT_CONTROL(m_descriptor->PortDescriptors[i]))
+        {
+	    if (LADSPA_IS_PORT_INPUT(m_descriptor->PortDescriptors[i])) {
+#ifdef DEBUG_LADSPA
+		std::cerr << "LADSPAPluginInstance::init: port " << i << " is control in" << std::endl;
+#endif
+		LADSPA_Data *data = new LADSPA_Data(0.0);
+		m_controlPortsIn.push_back(
+                    std::pair<unsigned long, LADSPA_Data*>(i, data));
+	    } else {
+#ifdef DEBUG_LADSPA
+		std::cerr << "LADSPAPluginInstance::init: port " << i << " is control out" << std::endl;
+#endif
+		LADSPA_Data *data = new LADSPA_Data(0.0);
+		m_controlPortsOut.push_back(
+                    std::pair<unsigned long, LADSPA_Data*>(i, data));
+		if (!strcmp(m_descriptor->PortNames[i], "latency") ||
+		    !strcmp(m_descriptor->PortNames[i], "_latency")) {
+#ifdef DEBUG_LADSPA
+		    std::cerr << "Wooo! We have a latency port!" << std::endl;
+#endif
+		    m_latencyPort = data;
+		}
+	    }
+        }
+#ifdef DEBUG_LADSPA
+        else
+            std::cerr << "LADSPAPluginInstance::init - "
+                      << "unrecognised port type" << std::endl;
+#endif
+    }
+
+    m_instanceCount = 1;
+
+    if (idealChannelCount > 0) {
+	if (m_audioPortsIn.size() == 1) {
+	    // mono plugin: duplicate it if need be
+	    m_instanceCount = idealChannelCount;
+	}
+    }
+}
+
+size_t
+LADSPAPluginInstance::getLatency()
+{
+    if (m_latencyPort) {
+	if (!m_run) run(RealTime::zeroTime);
+	if (*m_latencyPort > 0) return (size_t)*m_latencyPort;
+    }
+    return 0;
+}
+
+void
+LADSPAPluginInstance::silence()
+{
+    if (isOK()) {
+	deactivate();
+	activate();
+    }
+}
+
+void
+LADSPAPluginInstance::setIdealChannelCount(size_t channels)
+{
+    if (m_audioPortsIn.size() != 1 || channels == m_instanceCount) {
+	silence();
+	return;
+    }
+
+    if (isOK()) {
+	deactivate();
+    }
+
+    //!!! don't we need to reallocate inputBuffers and outputBuffers?
+
+    cleanup();
+    m_instanceCount = channels;
+    instantiate(m_sampleRate);
+    if (isOK()) {
+	connectPorts();
+	activate();
+    }
+}
+
+
+LADSPAPluginInstance::~LADSPAPluginInstance()
+{
+#ifdef DEBUG_LADSPA
+    std::cerr << "LADSPAPluginInstance::~LADSPAPluginInstance" << std::endl;
+#endif
+
+    if (m_instanceHandles.size() != 0) { // "isOK()"
+	deactivate();
+    }
+
+    cleanup();
+
+    for (unsigned int i = 0; i < m_controlPortsIn.size(); ++i)
+        delete m_controlPortsIn[i].second;
+
+    for (unsigned int i = 0; i < m_controlPortsOut.size(); ++i)
+        delete m_controlPortsOut[i].second;
+
+    m_controlPortsIn.clear();
+    m_controlPortsOut.clear();
+
+    if (m_ownBuffers) {
+	for (size_t i = 0; i < m_audioPortsIn.size(); ++i) {
+	    delete[] m_inputBuffers[i];
+	}
+	for (size_t i = 0; i < m_audioPortsOut.size(); ++i) {
+	    delete[] m_outputBuffers[i];
+	}
+
+	delete[] m_inputBuffers;
+	delete[] m_outputBuffers;
+    }
+
+    m_audioPortsIn.clear();
+    m_audioPortsOut.clear();
+}
+
+
+void
+LADSPAPluginInstance::instantiate(unsigned long sampleRate)
+{
+#ifdef DEBUG_LADSPA
+    std::cout << "LADSPAPluginInstance::instantiate - plugin unique id = "
+              << m_descriptor->UniqueID << std::endl;
+#endif
+    if (!m_descriptor) return;
+
+    if (!m_descriptor->instantiate) {
+	std::cerr << "Bad plugin: plugin id " << m_descriptor->UniqueID
+		  << ":" << m_descriptor->Label
+		  << " has no instantiate method!" << std::endl;
+	return;
+    }
+
+    for (size_t i = 0; i < m_instanceCount; ++i) {
+	m_instanceHandles.push_back
+	    (m_descriptor->instantiate(m_descriptor, sampleRate));
+    }
+}
+
+void
+LADSPAPluginInstance::activate()
+{
+    if (!m_descriptor || !m_descriptor->activate) return;
+
+    for (std::vector<LADSPA_Handle>::iterator hi = m_instanceHandles.begin();
+	 hi != m_instanceHandles.end(); ++hi) {
+	m_descriptor->activate(*hi);
+    }
+}
+
+void
+LADSPAPluginInstance::connectPorts()
+{
+    if (!m_descriptor || !m_descriptor->connect_port) return;
+
+    assert(sizeof(LADSPA_Data) == sizeof(float));
+    assert(sizeof(sample_t) == sizeof(float));
+
+    int inbuf = 0, outbuf = 0;
+
+    for (std::vector<LADSPA_Handle>::iterator hi = m_instanceHandles.begin();
+	 hi != m_instanceHandles.end(); ++hi) {
+
+	for (unsigned int i = 0; i < m_audioPortsIn.size(); ++i) {
+	    m_descriptor->connect_port(*hi,
+				       m_audioPortsIn[i],
+				       (LADSPA_Data *)m_inputBuffers[inbuf]);
+	    ++inbuf;
+	}
+
+	for (unsigned int i = 0; i < m_audioPortsOut.size(); ++i) {
+	    m_descriptor->connect_port(*hi,
+				       m_audioPortsOut[i],
+				       (LADSPA_Data *)m_outputBuffers[outbuf]);
+	    ++outbuf;
+	}
+
+	// If there is more than one instance, they all share the same
+	// control port ins (and outs, for the moment, because we
+	// don't actually do anything with the outs anyway -- but they
+	// do have to be connected as the plugin can't know if they're
+	// not and will write to them anyway).
+
+	for (unsigned int i = 0; i < m_controlPortsIn.size(); ++i) {
+	    m_descriptor->connect_port(*hi,
+				       m_controlPortsIn[i].first,
+				       m_controlPortsIn[i].second);
+	}
+
+	for (unsigned int i = 0; i < m_controlPortsOut.size(); ++i) {
+	    m_descriptor->connect_port(*hi,
+				       m_controlPortsOut[i].first,
+				       m_controlPortsOut[i].second);
+	}
+    }
+}
+
+unsigned int
+LADSPAPluginInstance::getParameterCount() const
+{
+    return m_controlPortsIn.size();
+}
+
+void
+LADSPAPluginInstance::setParameterValue(unsigned int parameter, float value)
+{
+    if (parameter >= m_controlPortsIn.size()) return;
+
+    unsigned int portNumber = m_controlPortsIn[parameter].first;
+
+    LADSPAPluginFactory *f = dynamic_cast<LADSPAPluginFactory *>(m_factory);
+    if (f) {
+	if (value < f->getPortMinimum(m_descriptor, portNumber)) {
+	    value = f->getPortMinimum(m_descriptor, portNumber);
+	}
+	if (value > f->getPortMaximum(m_descriptor, portNumber)) {
+	    value = f->getPortMaximum(m_descriptor, portNumber);
+	}
+    }
+
+    (*m_controlPortsIn[parameter].second) = value;
+}
+
+float
+LADSPAPluginInstance::getParameterValue(unsigned int parameter) const
+{
+    if (parameter >= m_controlPortsIn.size()) return 0.0;
+    return (*m_controlPortsIn[parameter].second);
+}
+
+float
+LADSPAPluginInstance::getParameterDefault(unsigned int parameter) const
+{
+    if (parameter >= m_controlPortsIn.size()) return 0.0;
+
+    LADSPAPluginFactory *f = dynamic_cast<LADSPAPluginFactory *>(m_factory);
+    if (f) {
+	return f->getPortDefault(m_descriptor, m_controlPortsIn[parameter].first);
+    } else {
+	return 0.0f;
+    }
+}
+
+void
+LADSPAPluginInstance::run(const RealTime &)
+{
+    if (!m_descriptor || !m_descriptor->run) return;
+
+    for (std::vector<LADSPA_Handle>::iterator hi = m_instanceHandles.begin();
+	 hi != m_instanceHandles.end(); ++hi) {
+        m_descriptor->run(*hi, m_blockSize);
+    }
+
+    m_run = true;
+}
+
+void
+LADSPAPluginInstance::deactivate()
+{
+    if (!m_descriptor || !m_descriptor->deactivate) return;
+
+    for (std::vector<LADSPA_Handle>::iterator hi = m_instanceHandles.begin();
+	 hi != m_instanceHandles.end(); ++hi) {
+        m_descriptor->deactivate(*hi);
+    }
+}
+
+void
+LADSPAPluginInstance::cleanup()
+{
+    if (!m_descriptor) return;
+
+    if (!m_descriptor->cleanup) {
+	std::cerr << "Bad plugin: plugin id " << m_descriptor->UniqueID
+		  << ":" << m_descriptor->Label
+		  << " has no cleanup method!" << std::endl;
+	return;
+    }
+
+    for (std::vector<LADSPA_Handle>::iterator hi = m_instanceHandles.begin();
+	 hi != m_instanceHandles.end(); ++hi) {
+	m_descriptor->cleanup(*hi);
+    }
+
+    m_instanceHandles.clear();
+}
+
+