comparison base/ViewManager.cpp @ 0:da6937383da8

initial import

+/* -*- 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.
+*/
+
+#include "ViewManager.h"
+#include "AudioPlaySource.h"
+#include "PlayParameters.h"
+#include "Model.h"
+
+#include <iostream>
+
+//#define DEBUG_VIEW_MANAGER 1
+
+ViewManager::ViewManager() :
+    m_playSource(0),
+    m_globalCentreFrame(0),
+    m_globalZoom(1024),
+    m_lastLeft(0), 
+    m_lastRight(0)
+{
+    connect(this, 
+	    SIGNAL(centreFrameChanged(void *, unsigned long, bool)),
+	    SLOT(considerSeek(void *, unsigned long, bool)));
+
+    connect(this, 
+	    SIGNAL(zoomLevelChanged(void *, unsigned long, bool)),
+	    SLOT(considerZoomChange(void *, unsigned long, bool)));
+}
+
+unsigned long
+ViewManager::getGlobalCentreFrame() const
+{
+#ifdef DEBUG_VIEW_MANAGER
+    std::cout << "ViewManager::getGlobalCentreFrame: returning " << m_globalCentreFrame << std::endl;
+#endif
+    return m_globalCentreFrame;
+}
+
+unsigned long
+ViewManager::getGlobalZoom() const
+{
+#ifdef DEBUG_VIEW_MANAGER
+    std::cout << "ViewManager::getGlobalZoom: returning " << m_globalZoom << std::endl;
+#endif
+    return m_globalZoom;
+}
+
+void
+ViewManager::setAudioPlaySource(AudioPlaySource *source)
+{
+    if (!m_playSource) {
+	QTimer::singleShot(100, this, SLOT(checkPlayStatus()));
+    }
+    m_playSource = source;
+}
+
+PlayParameters *
+ViewManager::getPlayParameters(const Model *model)
+{
+    if (m_playParameters.find(model) == m_playParameters.end()) {
+	// Give all models the same type of play parameters for the moment
+	m_playParameters[model] = new PlayParameters;
+    }
+
+    return m_playParameters[model];
+}
+
+void
+ViewManager::clearPlayParameters()
+{
+    while (!m_playParameters.empty()) {
+	delete m_playParameters.begin()->second;
+	m_playParameters.erase(m_playParameters.begin());
+    }
+}
+
+void
+ViewManager::checkPlayStatus()
+{
+    if (m_playSource && m_playSource->isPlaying()) {
+
+	float left = 0, right = 0;
+	if (m_playSource->getOutputLevels(left, right)) {
+	    if (left != m_lastLeft || right != m_lastRight) {
+		emit outputLevelsChanged(left, right);
+		m_lastLeft = left;
+		m_lastRight = right;
+	    }
+	}
+
+	m_globalCentreFrame = m_playSource->getCurrentPlayingFrame();
+
+#ifdef DEBUG_VIEW_MANAGER
+	std::cout << "ViewManager::checkPlayStatus: Playing, frame " << m_globalCentreFrame << ", levels " << m_lastLeft << "," << m_lastRight << std::endl;
+#endif
+
+	emit playbackFrameChanged(m_globalCentreFrame);
+
+	QTimer::singleShot(20, this, SLOT(checkPlayStatus()));
+
+    } else {
+
+	QTimer::singleShot(100, this, SLOT(checkPlayStatus()));
+	
+	if (m_lastLeft != 0.0 || m_lastRight != 0.0) {
+	    emit outputLevelsChanged(0.0, 0.0);
+	    m_lastLeft = 0.0;
+	    m_lastRight = 0.0;
+	}
+
+#ifdef DEBUG_VIEW_MANAGER
+//	std::cout << "ViewManager::checkPlayStatus: Not playing" << std::endl;
+#endif
+    }
+}
+
+void
+ViewManager::considerSeek(void *p, unsigned long f, bool locked)
+{
+    if (locked) {
+	m_globalCentreFrame = f;
+    }
+
+#ifdef DEBUG_VIEW_MANAGER 
+    std::cout << "ViewManager::considerSeek(" << p << ", " << f << ", " << locked << ")" << std::endl;
+#endif
+
+    if (p == this || !locked) return;
+
+    if (m_playSource && m_playSource->isPlaying()) {
+	unsigned long playFrame = m_playSource->getCurrentPlayingFrame();
+	unsigned long diff = std::max(f, playFrame) - std::min(f, playFrame);
+	if (diff > 20000) {
+	    m_playSource->play(f);
+#ifdef DEBUG_VIEW_MANAGER 
+	    std::cout << "ViewManager::considerSeek: reseeking from " << playFrame << " to " << f << std::endl;
+#endif
+	}
+    }
+}
+
+void
+ViewManager::considerZoomChange(void *p, unsigned long z, bool locked)
+{
+    if (locked) {
+	m_globalZoom = z;
+    }
+
+#ifdef DEBUG_VIEW_MANAGER 
+    std::cout << "ViewManager::considerZoomChange(" << p << ", " << z << ", " << locked << ")" << std::endl;
+#endif
+}
+
+#ifdef INCLUDE_MOCFILES
+#include "ViewManager.moc.cpp"
+#endif
+