Chris@0: /* -*- c-basic-offset: 4 -*-  vi:set ts=8 sts=4 sw=4: */
Chris@0: 
Chris@0: /*
Chris@0:     A waveform viewer and audio annotation editor.
Chris@2:     Chris Cannam, Queen Mary University of London, 2005-2006
Chris@0:     
Chris@0:     This is experimental software.  Not for distribution.
Chris@0: */
Chris@0: 
Chris@0: #include "ViewManager.h"
Chris@0: #include "AudioPlaySource.h"
Chris@0: #include "PlayParameters.h"
Chris@0: #include "Model.h"
Chris@0: 
Chris@0: #include <iostream>
Chris@0: 
Chris@0: //#define DEBUG_VIEW_MANAGER 1
Chris@0: 
Chris@0: ViewManager::ViewManager() :
Chris@0:     m_playSource(0),
Chris@0:     m_globalCentreFrame(0),
Chris@0:     m_globalZoom(1024),
Chris@0:     m_lastLeft(0), 
Chris@0:     m_lastRight(0)
Chris@0: {
Chris@0:     connect(this, 
Chris@0: 	    SIGNAL(centreFrameChanged(void *, unsigned long, bool)),
Chris@0: 	    SLOT(considerSeek(void *, unsigned long, bool)));
Chris@0: 
Chris@0:     connect(this, 
Chris@0: 	    SIGNAL(zoomLevelChanged(void *, unsigned long, bool)),
Chris@0: 	    SLOT(considerZoomChange(void *, unsigned long, bool)));
Chris@0: }
Chris@0: 
Chris@0: unsigned long
Chris@0: ViewManager::getGlobalCentreFrame() const
Chris@0: {
Chris@0: #ifdef DEBUG_VIEW_MANAGER
Chris@0:     std::cout << "ViewManager::getGlobalCentreFrame: returning " << m_globalCentreFrame << std::endl;
Chris@0: #endif
Chris@0:     return m_globalCentreFrame;
Chris@0: }
Chris@0: 
Chris@0: unsigned long
Chris@0: ViewManager::getGlobalZoom() const
Chris@0: {
Chris@0: #ifdef DEBUG_VIEW_MANAGER
Chris@0:     std::cout << "ViewManager::getGlobalZoom: returning " << m_globalZoom << std::endl;
Chris@0: #endif
Chris@0:     return m_globalZoom;
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: ViewManager::setAudioPlaySource(AudioPlaySource *source)
Chris@0: {
Chris@0:     if (!m_playSource) {
Chris@0: 	QTimer::singleShot(100, this, SLOT(checkPlayStatus()));
Chris@0:     }
Chris@0:     m_playSource = source;
Chris@0: }
Chris@0: 
Chris@0: PlayParameters *
Chris@0: ViewManager::getPlayParameters(const Model *model)
Chris@0: {
Chris@0:     if (m_playParameters.find(model) == m_playParameters.end()) {
Chris@0: 	// Give all models the same type of play parameters for the moment
Chris@0: 	m_playParameters[model] = new PlayParameters;
Chris@0:     }
Chris@0: 
Chris@0:     return m_playParameters[model];
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: ViewManager::clearPlayParameters()
Chris@0: {
Chris@0:     while (!m_playParameters.empty()) {
Chris@0: 	delete m_playParameters.begin()->second;
Chris@0: 	m_playParameters.erase(m_playParameters.begin());
Chris@0:     }
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: ViewManager::checkPlayStatus()
Chris@0: {
Chris@0:     if (m_playSource && m_playSource->isPlaying()) {
Chris@0: 
Chris@0: 	float left = 0, right = 0;
Chris@0: 	if (m_playSource->getOutputLevels(left, right)) {
Chris@0: 	    if (left != m_lastLeft || right != m_lastRight) {
Chris@0: 		emit outputLevelsChanged(left, right);
Chris@0: 		m_lastLeft = left;
Chris@0: 		m_lastRight = right;
Chris@0: 	    }
Chris@0: 	}
Chris@0: 
Chris@0: 	m_globalCentreFrame = m_playSource->getCurrentPlayingFrame();
Chris@0: 
Chris@0: #ifdef DEBUG_VIEW_MANAGER
Chris@0: 	std::cout << "ViewManager::checkPlayStatus: Playing, frame " << m_globalCentreFrame << ", levels " << m_lastLeft << "," << m_lastRight << std::endl;
Chris@0: #endif
Chris@0: 
Chris@0: 	emit playbackFrameChanged(m_globalCentreFrame);
Chris@0: 
Chris@0: 	QTimer::singleShot(20, this, SLOT(checkPlayStatus()));
Chris@0: 
Chris@0:     } else {
Chris@0: 
Chris@0: 	QTimer::singleShot(100, this, SLOT(checkPlayStatus()));
Chris@0: 	
Chris@0: 	if (m_lastLeft != 0.0 || m_lastRight != 0.0) {
Chris@0: 	    emit outputLevelsChanged(0.0, 0.0);
Chris@0: 	    m_lastLeft = 0.0;
Chris@0: 	    m_lastRight = 0.0;
Chris@0: 	}
Chris@0: 
Chris@0: #ifdef DEBUG_VIEW_MANAGER
Chris@0: //	std::cout << "ViewManager::checkPlayStatus: Not playing" << std::endl;
Chris@0: #endif
Chris@0:     }
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: ViewManager::considerSeek(void *p, unsigned long f, bool locked)
Chris@0: {
Chris@0:     if (locked) {
Chris@0: 	m_globalCentreFrame = f;
Chris@0:     }
Chris@0: 
Chris@0: #ifdef DEBUG_VIEW_MANAGER 
Chris@0:     std::cout << "ViewManager::considerSeek(" << p << ", " << f << ", " << locked << ")" << std::endl;
Chris@0: #endif
Chris@0: 
Chris@0:     if (p == this || !locked) return;
Chris@0: 
Chris@0:     if (m_playSource && m_playSource->isPlaying()) {
Chris@0: 	unsigned long playFrame = m_playSource->getCurrentPlayingFrame();
Chris@0: 	unsigned long diff = std::max(f, playFrame) - std::min(f, playFrame);
Chris@0: 	if (diff > 20000) {
Chris@0: 	    m_playSource->play(f);
Chris@0: #ifdef DEBUG_VIEW_MANAGER 
Chris@0: 	    std::cout << "ViewManager::considerSeek: reseeking from " << playFrame << " to " << f << std::endl;
Chris@0: #endif
Chris@0: 	}
Chris@0:     }
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: ViewManager::considerZoomChange(void *p, unsigned long z, bool locked)
Chris@0: {
Chris@0:     if (locked) {
Chris@0: 	m_globalZoom = z;
Chris@0:     }
Chris@0: 
Chris@0: #ifdef DEBUG_VIEW_MANAGER 
Chris@0:     std::cout << "ViewManager::considerZoomChange(" << p << ", " << z << ", " << locked << ")" << std::endl;
Chris@0: #endif
Chris@0: }
Chris@0: 
Chris@0: #ifdef INCLUDE_MOCFILES
Chris@0: #include "ViewManager.moc.cpp"
Chris@0: #endif
Chris@0: