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authortpearson <tpearson@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2010-03-01 18:37:05 +0000
committertpearson <tpearson@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2010-03-01 18:37:05 +0000
commit145364a8af6a1fec06556221e66d4b724a62fc9a (patch)
tree53bd71a544008c518034f208d64c932dc2883f50 /src/gui/editors/segment/segmentcanvas/AudioPreviewUpdater.cpp
downloadrosegarden-145364a8af6a1fec06556221e66d4b724a62fc9a.tar.gz
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Added old abandoned KDE3 version of the RoseGarden MIDI tool
git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/applications/rosegarden@1097595 283d02a7-25f6-0310-bc7c-ecb5cbfe19da
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+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
+
+/*
+ Rosegarden
+ A MIDI and audio sequencer and musical notation editor.
+
+ This program is Copyright 2000-2008
+ Guillaume Laurent <[email protected]>,
+ Chris Cannam <[email protected]>,
+ Richard Bown <[email protected]>
+
+ The moral rights of Guillaume Laurent, Chris Cannam, and Richard
+ Bown to claim authorship of this work have been asserted.
+
+ Other copyrights also apply to some parts of this work. Please
+ see the AUTHORS file and individual file headers for details.
+
+ 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 "AudioPreviewUpdater.h"
+
+#include "misc/Debug.h"
+#include "AudioPreviewThread.h"
+#include "base/Composition.h"
+#include "base/RealTime.h"
+#include "base/Segment.h"
+#include "CompositionModelImpl.h"
+#include <qevent.h>
+#include <qobject.h>
+#include <qrect.h>
+
+
+namespace Rosegarden
+{
+
+static int apuExtantCount = 0;
+
+AudioPreviewUpdater::AudioPreviewUpdater(AudioPreviewThread &thread,
+ const Composition& c, const Segment* s,
+ const QRect& r,
+ CompositionModelImpl* parent)
+ : QObject(parent),
+ m_thread(thread),
+ m_composition(c),
+ m_segment(s),
+ m_rect(r),
+ m_showMinima(false),
+ m_channels(0),
+ m_previewToken( -1)
+{
+ ++apuExtantCount;
+ RG_DEBUG << "AudioPreviewUpdater::AudioPreviewUpdater " << this << " (now " << apuExtantCount << " extant)" << endl;
+}
+
+AudioPreviewUpdater::~AudioPreviewUpdater()
+{
+ --apuExtantCount;
+ RG_DEBUG << "AudioPreviewUpdater::~AudioPreviewUpdater on " << this << " ( token " << m_previewToken << ") (now " << apuExtantCount << " extant)" << endl;
+ if (m_previewToken >= 0)
+ m_thread.cancelPreview(m_previewToken);
+}
+
+void AudioPreviewUpdater::update()
+{
+ // Get sample start and end times and work out duration
+ //
+ RealTime audioStartTime = m_segment->getAudioStartTime();
+ RealTime audioEndTime = audioStartTime +
+ m_composition.getElapsedRealTime(m_segment->getEndMarkerTime()) -
+ m_composition.getElapsedRealTime(m_segment->getStartTime()) ;
+
+ RG_DEBUG << "AudioPreviewUpdater(" << this << ")::update() - for file id "
+ << m_segment->getAudioFileId() << " requesting values - thread running : "
+ << m_thread.running() << " - thread finished : " << m_thread.finished() << endl;
+
+ AudioPreviewThread::Request request;
+ request.audioFileId = m_segment->getAudioFileId();
+ request.audioStartTime = audioStartTime;
+ request.audioEndTime = audioEndTime;
+ request.width = m_rect.width();
+ request.showMinima = m_showMinima;
+ request.notify = this;
+ if (m_previewToken >= 0)
+ m_thread.cancelPreview(m_previewToken);
+ m_previewToken = m_thread.requestPreview(request);
+ if (!m_thread.running())
+ m_thread.start();
+}
+
+void AudioPreviewUpdater::cancel()
+{
+ if (m_previewToken >= 0)
+ m_thread.cancelPreview(m_previewToken);
+ m_previewToken = -1;
+}
+
+bool AudioPreviewUpdater::event(QEvent *e)
+{
+ RG_DEBUG << "AudioPreviewUpdater(" << this << ")::event (" << e << ")" << endl;
+
+ if (e->type() == AudioPreviewThread::AudioPreviewReady) {
+ QCustomEvent *ev = dynamic_cast<QCustomEvent *>(e);
+ if (ev) {
+ intptr_t token = (intptr_t)ev->data();
+ m_channels = 0; // to be filled as getPreview return value
+
+ RG_DEBUG << "AudioPreviewUpdater::token " << token << ", my token " << m_previewToken << endl;
+
+ if (m_previewToken >= 0 && token >= m_previewToken) {
+
+ m_previewToken = -1;
+ m_thread.getPreview(token, m_channels, m_values);
+
+ if (m_channels == 0) {
+ RG_DEBUG << "AudioPreviewUpdater: failed to find preview!\n";
+ } else {
+
+ RG_DEBUG << "AudioPreviewUpdater: got correct preview (" << m_channels
+ << " channels, " << m_values.size() << " samples)\n";
+ }
+
+ emit audioPreviewComplete(this);
+
+ } else {
+
+ // this one is out of date already
+ std::vector<float> tmp;
+ unsigned int tmpChannels;
+ m_thread.getPreview(token, tmpChannels, tmp);
+
+ RG_DEBUG << "AudioPreviewUpdater: got obsolete preview (" << tmpChannels
+ << " channels, " << tmp.size() << " samples)\n";
+ }
+
+ return true;
+ }
+ }
+
+ return QObject::event(e);
+}
+
+}
+#include "AudioPreviewUpdater.moc"