view transform/RealTimePluginTransform.cpp @ 25:e74f508db18c

* Add setRatio method to the time stretcher, and make it possible to change
  the ratio without having to construct and replace the time stretcher.  This
  means we can do it seamlessly.  Add a lot more ratios to the
  time stretch control in the main window

/* -*- 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 "data/model/Model.h"
#include "data/model/SparseTimeValueModel.h"
#include "data/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);
}