diff transform/RealTimePluginTransform.cpp @ 60:3086ff194ea0

* More structural work on feature extraction plugin C <-> C++ adapter
* Allow use of LADSPA/DSSI plugins with control outputs as feature extraction
  plugins (DSSI with MIDI output still to come)
* Reorder labels on spectrogram status box
* Minor tweaks in doc etc.

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/transform/RealTimePluginTransform.cpp	Mon Mar 27 15:03:02 2006 +0000
@@ -0,0 +1,160 @@
+
+/* -*- 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 "base/Model.h"
+#include "model/SparseTimeValueModel.h"
+#include "model/DenseTimeValueModel.h"
+
+#include <iostream>
+
+RealTimePluginTransform::RealTimePluginTransform(Model *inputModel,
+                                                 QString pluginId,
+                                                 QString configurationXml,
+                                                 int output) :
+    Transform(inputModel),
+    m_plugin(0),
+    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 != "") {
+        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;
+    }
+	
+    m_output = new SparseTimeValueModel(input->getSampleRate(),
+                                        1024, //!!!
+                                        0.0, 0.0, false);
+}
+
+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();
+    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) {
+
+	std::cout << "RealTimePluginTransform::run: blockFrame "
+		  << blockFrame;
+
+	size_t completion =
+	    (((blockFrame - startFrame) / blockSize) * 99) /
+	    (   (endFrame - startFrame) / blockSize);
+
+	size_t got = 0;
+
+	if (channelCount == 1) {
+	    got = input->getValues
+		(-1, blockFrame, blockFrame + blockSize, buffers[0]);
+	    while (got < blockSize) {
+		buffers[0][got++] = 0.0;
+	    }
+	} 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(RealTime::frame2RealTime(blockFrame, sampleRate));
+
+        float value = m_plugin->getControlOutputValue(m_outputNo);
+
+        std::cout << " value " << value << std::endl;
+
+	model->addPoint(SparseTimeValueModel::Point(blockFrame, value, ""));
+
+	if (blockFrame == startFrame || completion > prevCompletion) {
+	    model->setCompletion(completion);
+	    prevCompletion = completion;
+	}
+        
+	blockFrame += blockSize;
+    }
+    
+    model->setCompletion(100);
+}
+