From 145364a8af6a1fec06556221e66d4b724a62fc9a Mon Sep 17 00:00:00 2001 From: tpearson Date: Mon, 1 Mar 2010 18:37:05 +0000 Subject: 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 --- .../segment/segmentcanvas/AudioPreviewUpdater.cpp | 149 +++++++++++++++++++++ 1 file changed, 149 insertions(+) create mode 100644 src/gui/editors/segment/segmentcanvas/AudioPreviewUpdater.cpp (limited to 'src/gui/editors/segment/segmentcanvas/AudioPreviewUpdater.cpp') diff --git a/src/gui/editors/segment/segmentcanvas/AudioPreviewUpdater.cpp b/src/gui/editors/segment/segmentcanvas/AudioPreviewUpdater.cpp new file mode 100644 index 0000000..76497b9 --- /dev/null +++ b/src/gui/editors/segment/segmentcanvas/AudioPreviewUpdater.cpp @@ -0,0 +1,149 @@ +/* -*- 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 , + Chris Cannam , + Richard Bown + + 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 +#include +#include + + +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(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 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" -- cgit v1.2.1