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150 lines
4.9 KiB
150 lines
4.9 KiB
/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
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/*
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Rosegarden
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A MIDI and audio sequencer and musical notation editor.
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This program is Copyright 2000-2008
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Guillaume Laurent <glaurent@telegraph-road.org>,
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Chris Cannam <cannam@all-day-breakfast.com>,
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Richard Bown <richard.bown@ferventsoftware.com>
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The moral rights of Guillaume Laurent, Chris Cannam, and Richard
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Bown to claim authorship of this work have been asserted.
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Other copyrights also apply to some parts of this work. Please
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see the AUTHORS file and individual file headers for details.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version. See the file
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COPYING included with this distribution for more information.
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*/
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#include "AudioPreviewUpdater.h"
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#include "misc/Debug.h"
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#include "AudioPreviewThread.h"
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#include "base/Composition.h"
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#include "base/RealTime.h"
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#include "base/Segment.h"
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#include "CompositionModelImpl.h"
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#include <tqevent.h>
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#include <tqobject.h>
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#include <tqrect.h>
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namespace Rosegarden
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{
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static int apuExtantCount = 0;
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AudioPreviewUpdater::AudioPreviewUpdater(AudioPreviewThread &thread,
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const Composition& c, const Segment* s,
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const TQRect& r,
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CompositionModelImpl* parent)
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: TQObject(parent),
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m_thread(thread),
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m_composition(c),
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m_segment(s),
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m_rect(r),
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m_showMinima(false),
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m_channels(0),
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m_previewToken( -1)
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{
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++apuExtantCount;
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RG_DEBUG << "AudioPreviewUpdater::AudioPreviewUpdater " << this << " (now " << apuExtantCount << " extant)" << endl;
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}
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AudioPreviewUpdater::~AudioPreviewUpdater()
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{
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--apuExtantCount;
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RG_DEBUG << "AudioPreviewUpdater::~AudioPreviewUpdater on " << this << " ( token " << m_previewToken << ") (now " << apuExtantCount << " extant)" << endl;
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if (m_previewToken >= 0)
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m_thread.cancelPreview(m_previewToken);
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}
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void AudioPreviewUpdater::update()
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{
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// Get sample start and end times and work out duration
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//
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RealTime audioStartTime = m_segment->getAudioStartTime();
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RealTime audioEndTime = audioStartTime +
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m_composition.getElapsedRealTime(m_segment->getEndMarkerTime()) -
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m_composition.getElapsedRealTime(m_segment->getStartTime()) ;
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RG_DEBUG << "AudioPreviewUpdater(" << this << ")::update() - for file id "
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<< m_segment->getAudioFileId() << " requesting values - thread running : "
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<< m_thread.running() << " - thread finished : " << m_thread.finished() << endl;
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AudioPreviewThread::Request request;
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request.audioFileId = m_segment->getAudioFileId();
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request.audioStartTime = audioStartTime;
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request.audioEndTime = audioEndTime;
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request.width = m_rect.width();
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request.showMinima = m_showMinima;
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request.notify = this;
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if (m_previewToken >= 0)
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m_thread.cancelPreview(m_previewToken);
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m_previewToken = m_thread.requestPreview(request);
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if (!m_thread.running())
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m_thread.start();
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}
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void AudioPreviewUpdater::cancel()
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{
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if (m_previewToken >= 0)
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m_thread.cancelPreview(m_previewToken);
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m_previewToken = -1;
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}
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bool AudioPreviewUpdater::event(TQEvent *e)
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{
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RG_DEBUG << "AudioPreviewUpdater(" << this << ")::event (" << e << ")" << endl;
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if (e->type() == AudioPreviewThread::AudioPreviewReady) {
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TQCustomEvent *ev = dynamic_cast<TQCustomEvent *>(e);
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if (ev) {
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intptr_t token = (intptr_t)ev->data();
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m_channels = 0; // to be filled as getPreview return value
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RG_DEBUG << "AudioPreviewUpdater::token " << token << ", my token " << m_previewToken << endl;
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if (m_previewToken >= 0 && token >= m_previewToken) {
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m_previewToken = -1;
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m_thread.getPreview(token, m_channels, m_values);
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if (m_channels == 0) {
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RG_DEBUG << "AudioPreviewUpdater: failed to find preview!\n";
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} else {
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RG_DEBUG << "AudioPreviewUpdater: got correct preview (" << m_channels
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<< " channels, " << m_values.size() << " samples)\n";
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}
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emit audioPreviewComplete(this);
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} else {
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// this one is out of date already
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std::vector<float> tmp;
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unsigned int tmpChannels;
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m_thread.getPreview(token, tmpChannels, tmp);
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RG_DEBUG << "AudioPreviewUpdater: got obsolete preview (" << tmpChannels
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<< " channels, " << tmp.size() << " samples)\n";
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}
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return true;
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}
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}
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return TQObject::event(e);
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}
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}
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#include "AudioPreviewUpdater.moc"
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