view transform/RealTimePluginTransform.cpp @ 76:af2725b5d6fe

* Implement harmonic cursor in spectrogram
* Implement layer export.  This doesn't quite do the right thing for the SV
  XML layer export yet -- it doesn't include layer display information, so
  when imported, it only creates an invisible model.  Could also do with
  fixing CSV file import so as to work correctly for note and text layers.

/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */

/*
    Sonic Visualiser
    An audio file viewer and annotation editor.
    Centre for Digital Music, Queen Mary, University of London.
    This file copyright 2006 Chris Cannam.
    
    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.  See the file
    COPYING included with this distribution for more information.
*/

#include "RealTimePluginTransform.h"

#include "plugin/RealTimePluginFactory.h"
#include "plugin/RealTimePluginInstance.h"
#include "plugin/PluginXml.h"

#include "base/Model.h"
#include "model/SparseTimeValueModel.h"
#include "model/DenseTimeValueModel.h"

#include <iostream>

RealTimePluginTransform::RealTimePluginTransform(Model *inputModel,
                                                 QString pluginId,
                                                 int channel,
                                                 QString configurationXml,
                                                 QString units,
                                                 int output) :
    Transform(inputModel),
    m_plugin(0),
    m_channel(channel),
    m_outputNo(output)
{
    std::cerr << "RealTimePluginTransform::RealTimePluginTransform: plugin " << pluginId.toStdString() << ", output " << output << std::endl;

    RealTimePluginFactory *factory =
	RealTimePluginFactory::instanceFor(pluginId);

    if (!factory) {
	std::cerr << "RealTimePluginTransform: No factory available for plugin id \""
		  << pluginId.toStdString() << "\"" << std::endl;
	return;
    }

    DenseTimeValueModel *input = getInput();
    if (!input) return;

    m_plugin = factory->instantiatePlugin(pluginId, 0, 0, m_input->getSampleRate(),
                                          1024, //!!! wants to be configurable
                                          input->getChannelCount());

    if (!m_plugin) {
	std::cerr << "RealTimePluginTransform: Failed to instantiate plugin \""
		  << pluginId.toStdString() << "\"" << std::endl;
	return;
    }

    if (configurationXml != "") {
        PluginXml(m_plugin).setParametersFromXml(configurationXml);
    }

    if (m_outputNo >= m_plugin->getControlOutputCount()) {
        std::cerr << "RealTimePluginTransform: Plugin has fewer than desired " << m_outputNo << " control outputs" << std::endl;
        return;
    }
	
    SparseTimeValueModel *model = new SparseTimeValueModel
        (input->getSampleRate(), 1024, //!!!
         0.0, 0.0, false);

    if (units != "") model->setScaleUnits(units);

    m_output = model;
}

RealTimePluginTransform::~RealTimePluginTransform()
{
    delete m_plugin;
}

DenseTimeValueModel *
RealTimePluginTransform::getInput()
{
    DenseTimeValueModel *dtvm =
	dynamic_cast<DenseTimeValueModel *>(getInputModel());
    if (!dtvm) {
	std::cerr << "RealTimePluginTransform::getInput: WARNING: Input model is not conformable to DenseTimeValueModel" << std::endl;
    }
    return dtvm;
}

void
RealTimePluginTransform::run()
{
    DenseTimeValueModel *input = getInput();
    if (!input) return;

    SparseTimeValueModel *model = dynamic_cast<SparseTimeValueModel *>(m_output);
    if (!model) return;

    if (m_outputNo >= m_plugin->getControlOutputCount()) return;

    size_t sampleRate = input->getSampleRate();
    int channelCount = input->getChannelCount();
    if (m_channel != -1) channelCount = 1;

    size_t blockSize = m_plugin->getBufferSize();

    float **buffers = m_plugin->getAudioInputBuffers();

    size_t startFrame = m_input->getStartFrame();
    size_t   endFrame = m_input->getEndFrame();
    size_t blockFrame = startFrame;

    size_t prevCompletion = 0;

    int i = 0;

    while (blockFrame < endFrame) {

	size_t completion =
	    (((blockFrame - startFrame) / blockSize) * 99) /
	    (   (endFrame - startFrame) / blockSize);

	size_t got = 0;

	if (channelCount == 1) {
	    got = input->getValues
		(m_channel, blockFrame, blockFrame + blockSize, buffers[0]);
	    while (got < blockSize) {
		buffers[0][got++] = 0.0;
	    }
            if (m_channel == -1 && channelCount > 1) {
                // use mean instead of sum, as plugin input
                for (size_t i = 0; i < got; ++i) {
                    buffers[0][i] /= channelCount;
                }
            }                
	} else {
	    for (size_t ch = 0; ch < channelCount; ++ch) {
		got = input->getValues
		    (ch, blockFrame, blockFrame + blockSize, buffers[ch]);
		while (got < blockSize) {
		    buffers[ch][got++] = 0.0;
		}
	    }
	}

        m_plugin->run(Vamp::RealTime::frame2RealTime(blockFrame, sampleRate));

        float value = m_plugin->getControlOutputValue(m_outputNo);

	model->addPoint(SparseTimeValueModel::Point
                        (blockFrame - m_plugin->getLatency(), value, ""));

	if (blockFrame == startFrame || completion > prevCompletion) {
	    model->setCompletion(completion);
	    prevCompletion = completion;
	}
        
	blockFrame += blockSize;
    }
    
    model->setCompletion(100);
}