annotate plugin/LADSPAPluginInstance.cpp @ 6:44bbf5793d84

* Rework handling of layer properties in file I/O -- we now get the individual
  layers to load and save them rather than doing it via generic property lists
  in the base class, so as to ensure we read and write meaningful values rather
  than generic int values requiring conversion.

/* -*- 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, 2005-2006
    
    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();
}