/*************************************************************************** * DocClipBase.cpp - description * * ------------------- * * begin : Fri Apr 12 2002 * * Copyright (C) 2002 by Jason Wood (jasonwood@blueyonder.co.uk) * * Copyright (C) 2007 by Jean-Baptiste Mardelle (jb@kdenlive.org) * * * * 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. * * * * This program is distributed in the hope that it will be useful, * * but WITHOUT ANY WARRANTY; without even the implied warranty of * * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * * GNU General Public License for more details. * * * * You should have received a copy of the GNU General Public License * * along with this program; if not, write to the * * Free Software Foundation, Inc., * * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA * ***************************************************************************/ #include "docclipbase.h" #include "kdenlivesettings.h" #include "kthumb.h" #include "clipmanager.h" #include <KIO/NetAccess> #include <KDebug> #include <QCryptographicHash> DocClipBase::DocClipBase(ClipManager *clipManager, QDomElement xml, const QString &id) : QObject(), m_audioFrameCache(), m_refcount(0), m_baseTrackProducers(), m_audioTrackProducers(), m_videoOnlyProducer(NULL), m_snapMarkers(), m_duration(), m_audioTimer(NULL), m_thumbProd(NULL), m_audioThumbCreated(false), m_id(id), m_placeHolder(xml.hasAttribute("placeholder")), m_properties() { int type = xml.attribute("type").toInt(); m_clipType = (CLIPTYPE) type; if (m_placeHolder) xml.removeAttribute("placeholder"); QDomNamedNodeMap attributes = xml.attributes(); for (int i = 0; i < attributes.count(); i++) { m_properties.insert(attributes.item(i).nodeName(), attributes.item(i).nodeValue()); } KUrl url = KUrl(xml.attribute("resource")); if (!m_properties.contains("file_hash") && !url.isEmpty()) getFileHash(url.path()); if (xml.hasAttribute("duration")) { setDuration(GenTime(xml.attribute("duration").toInt(), KdenliveSettings::project_fps())); } else { int out = xml.attribute("out").toInt(); int in = xml.attribute("in").toInt(); setDuration(GenTime(out - in, KdenliveSettings::project_fps())); } if (!m_properties.contains("name")) m_properties.insert("name", url.fileName()); //if (!url.isEmpty() && QFile::exists(url.path())) { m_thumbProd = new KThumb(clipManager, url, m_id, m_properties.value("file_hash")); if (m_clipType == AV || m_clipType == AUDIO) slotCreateAudioTimer(); } //kDebug() << "type is video" << (m_clipType == AV) << " " << m_clipType; } /*DocClipBase & DocClipBase::operator=(const DocClipBase & clip) { DocClipBase::operator=(clip); m_id = clip.getId(); m_clipType = clip.clipType(); m_name = clip.name(); m_duration = clip.duration(); m_audioThumbCreated = clip.audioThumbCreated(); m_properties = clip.properties(); return *this; }*/ DocClipBase::~DocClipBase() { delete m_thumbProd; if (m_audioTimer) { m_audioTimer->stop(); delete m_audioTimer; } qDeleteAll(m_baseTrackProducers); m_baseTrackProducers.clear(); qDeleteAll(m_audioTrackProducers); m_audioTrackProducers.clear(); delete m_videoOnlyProducer; m_videoOnlyProducer = NULL; } void DocClipBase::setZone(QPoint zone) { m_properties.insert("zone_in", QString::number(zone.x())); m_properties.insert("zone_out", QString::number(zone.y())); } QPoint DocClipBase::zone() const { QPoint zone; zone.setX(m_properties.value("zone_in").toInt()); zone.setY(m_properties.value("zone_out", "50").toInt()); return zone; } void DocClipBase::slotCreateAudioTimer() { connect(m_thumbProd, SIGNAL(audioThumbReady(QMap <int, QMap <int, QByteArray> >)), this , SLOT(updateAudioThumbnail(QMap <int, QMap <int, QByteArray> >))); connect(this, SIGNAL(getAudioThumbs()), this , SLOT(slotGetAudioThumbs())); m_audioTimer = new QTimer(this); connect(m_audioTimer, SIGNAL(timeout()), this, SLOT(slotGetAudioThumbs())); } void DocClipBase::askForAudioThumbs() { if (m_thumbProd) m_thumbProd->askForAudioThumbs(getId()); } void DocClipBase::slotClearAudioCache() { if (m_thumbProd) m_thumbProd->stopAudioThumbs(); if (m_audioTimer != NULL) m_audioTimer->stop(); m_audioFrameCache.clear(); m_audioThumbCreated = false; } /*void DocClipBase::getClipMainThumb() { if (m_thumbProd) m_thumbProd->getMainThumb(m_properties.value("thumbnail").toInt()); }*/ KThumb *DocClipBase::thumbProducer() { return m_thumbProd; } bool DocClipBase::audioThumbCreated() const { return m_audioThumbCreated; } const QString DocClipBase::name() const { return m_properties.value("name"); } const QString &DocClipBase::getId() const { return m_id; } void DocClipBase::setId(const QString &newId) { m_id = newId; } const CLIPTYPE & DocClipBase::clipType() const { return m_clipType; } void DocClipBase::setClipType(CLIPTYPE type) { m_clipType = type; m_properties.insert("type", QString::number((int) type)); if (m_thumbProd && m_audioTimer == NULL && (m_clipType == AV || m_clipType == AUDIO)) slotCreateAudioTimer(); } KUrl DocClipBase::fileURL() const { QString res = m_properties.value("resource"); if (m_clipType != COLOR && !res.isEmpty()) return KUrl(res); return KUrl(); } void DocClipBase::setClipThumbFrame(const uint &ix) { m_properties.insert("thumbnail", QString::number((int) ix)); } uint DocClipBase::getClipThumbFrame() const { return (uint) m_properties.value("thumbnail").toInt(); } const QString DocClipBase::description() const { return m_properties.value("description"); } bool DocClipBase::isTransparent() const { return (m_properties.value("transparency") == "1"); } const QString DocClipBase::getProperty(const QString prop) const { return m_properties.value(prop); } void DocClipBase::setDuration(GenTime dur) { m_duration = dur; m_properties.insert("duration", QString::number((int) dur.frames(KdenliveSettings::project_fps()))); } const GenTime &DocClipBase::duration() const { return m_duration; } const GenTime DocClipBase::maxDuration() const { if (m_clipType == COLOR || m_clipType == IMAGE || m_clipType == TEXT || (m_clipType == SLIDESHOW && m_properties.value("loop") == "1")) { const GenTime dur(15000, KdenliveSettings::project_fps()); return dur; } return m_duration; } bool DocClipBase::hasFileSize() const { return true; } // virtual QDomElement DocClipBase::toXML() const { QDomDocument doc; QDomElement clip = doc.createElement("producer"); QMapIterator<QString, QString> i(m_properties); while (i.hasNext()) { i.next(); if (!i.value().isEmpty()) clip.setAttribute(i.key(), i.value()); } doc.appendChild(clip); //kDebug()<<"/// CLIP XML: "<<doc.toString(); return doc.documentElement(); } void DocClipBase::setAudioThumbCreated(bool isDone) { m_audioThumbCreated = isDone; } void DocClipBase::setThumbnail(const QPixmap & pixmap) { m_thumbnail = pixmap; } const QPixmap & DocClipBase::thumbnail() const { return m_thumbnail; } void DocClipBase::updateAudioThumbnail(QMap<int, QMap<int, QByteArray> > data) { //kDebug() << "CLIPBASE RECIEDVED AUDIO DATA*********************************************"; m_audioFrameCache = data; m_audioThumbCreated = true; emit gotAudioData(); } QList < GenTime > DocClipBase::snapMarkers() const { QList < GenTime > markers; for (int count = 0; count < m_snapMarkers.count(); ++count) { markers.append(m_snapMarkers[count].time()); } return markers; } QList < CommentedTime > DocClipBase::commentedSnapMarkers() const { return m_snapMarkers; } void DocClipBase::setSnapMarkers(QList < CommentedTime > markers) { m_snapMarkers = markers; } void DocClipBase::addSnapMarker(const GenTime & time, QString comment) { QList < CommentedTime >::Iterator it = m_snapMarkers.begin(); for (it = m_snapMarkers.begin(); it != m_snapMarkers.end(); ++it) { if ((*it).time() >= time) break; } if ((it != m_snapMarkers.end()) && ((*it).time() == time)) { (*it).setComment(comment); //kError() << "trying to add Snap Marker that already exists, this will cause inconsistancies with undo/redo"; } else { CommentedTime t(time, comment); m_snapMarkers.insert(it, t); } } void DocClipBase::editSnapMarker(const GenTime & time, QString comment) { QList < CommentedTime >::Iterator it; for (it = m_snapMarkers.begin(); it != m_snapMarkers.end(); ++it) { if ((*it).time() == time) break; } if (it != m_snapMarkers.end()) { (*it).setComment(comment); } else { kError() << "trying to edit Snap Marker that does not already exists"; } } QString DocClipBase::deleteSnapMarker(const GenTime & time) { QString result = i18n("Marker"); QList < CommentedTime >::Iterator itt = m_snapMarkers.begin(); while (itt != m_snapMarkers.end()) { if ((*itt).time() == time) break; ++itt; } if ((itt != m_snapMarkers.end()) && ((*itt).time() == time)) { result = (*itt).comment(); m_snapMarkers.erase(itt); } return result; } GenTime DocClipBase::hasSnapMarkers(const GenTime & time) { QList < CommentedTime >::Iterator itt = m_snapMarkers.begin(); while (itt != m_snapMarkers.end()) { if ((*itt).time() == time) return time; ++itt; } return GenTime(0.0); } GenTime DocClipBase::findPreviousSnapMarker(const GenTime & currTime) { int it; for (it = 0; it < m_snapMarkers.count(); it++) { if (m_snapMarkers[it].time() >= currTime) break; } if (it == 0) return GenTime(); else if (it == m_snapMarkers.count() - 1 && m_snapMarkers[it].time() < currTime) return m_snapMarkers[it].time(); else return m_snapMarkers[it-1].time(); } GenTime DocClipBase::findNextSnapMarker(const GenTime & currTime) { int it; for (it = 0; it < m_snapMarkers.count(); it++) { if (m_snapMarkers[it].time() > currTime) break; } if (it < m_snapMarkers.count() && m_snapMarkers[it].time() > currTime) return m_snapMarkers[it].time(); return duration(); } QString DocClipBase::markerComment(GenTime t) { QList < CommentedTime >::Iterator itt = m_snapMarkers.begin(); while (itt != m_snapMarkers.end()) { if ((*itt).time() == t) return (*itt).comment(); ++itt; } return QString(); } void DocClipBase::deleteProducers() { qDeleteAll(m_baseTrackProducers); m_baseTrackProducers.clear(); if (m_thumbProd) m_thumbProd->clearProducer(); qDeleteAll(m_audioTrackProducers); m_audioTrackProducers.clear(); delete m_videoOnlyProducer; m_videoOnlyProducer = NULL; } void DocClipBase::setProducer(Mlt::Producer *producer) { if (producer == NULL) return; QString id = producer->get("id"); if (id.contains('_')) { // this is a subtrack producer, insert it at correct place id = id.section('_', 1); if (id.endsWith("audio")) { int pos = id.section('_', 0, 0).toInt(); if (pos >= m_audioTrackProducers.count()) { while (m_audioTrackProducers.count() - 1 < pos) { m_audioTrackProducers.append(NULL); } } if (m_audioTrackProducers.at(pos) == NULL) m_audioTrackProducers[pos] = producer; return; } if (id.endsWith("video")) { m_videoOnlyProducer = producer; return; } int pos = id.toInt(); if (pos >= m_baseTrackProducers.count()) { while (m_baseTrackProducers.count() - 1 < pos) { m_baseTrackProducers.append(NULL); } } if (m_baseTrackProducers.at(pos) == NULL) m_baseTrackProducers[pos] = producer; } else { if (m_baseTrackProducers.isEmpty()) m_baseTrackProducers.append(producer); else if (m_baseTrackProducers.at(0) == NULL) m_baseTrackProducers[0] = producer; } //m_clipProducer = producer; //m_clipProducer->set("transparency", m_properties.value("transparency").toInt()); if (m_thumbProd && !m_thumbProd->hasProducer()) m_thumbProd->setProducer(producer); } Mlt::Producer *DocClipBase::audioProducer(int track) { if (m_audioTrackProducers.count() <= track) { while (m_audioTrackProducers.count() - 1 < track) { m_audioTrackProducers.append(NULL); } } if (m_audioTrackProducers.at(track) == NULL) { Mlt::Producer *base = producer(); m_audioTrackProducers[track] = new Mlt::Producer(*(base->profile()), base->get("resource")); if (m_properties.contains("force_aspect_ratio")) m_audioTrackProducers.at(track)->set("force_aspect_ratio", m_properties.value("force_aspect_ratio").toDouble()); if (m_properties.contains("threads")) m_audioTrackProducers.at(track)->set("threads", m_properties.value("threads").toInt()); m_audioTrackProducers.at(track)->set("video_index", -1); if (m_properties.contains("audio_index")) m_audioTrackProducers.at(track)->set("audio_index", m_properties.value("audio_index").toInt()); char *tmp = (char *) qstrdup(QString(getId() + '_' + QString::number(track) + "_audio").toUtf8().data()); m_audioTrackProducers.at(track)->set("id", tmp); delete[] tmp; } return m_audioTrackProducers.at(track); } Mlt::Producer *DocClipBase::videoProducer() { if (m_videoOnlyProducer == NULL) { int i; for (i = 0; i < m_baseTrackProducers.count(); i++) if (m_baseTrackProducers.at(i) != NULL) break; if (i >= m_baseTrackProducers.count()) return NULL; m_videoOnlyProducer = new Mlt::Producer(*m_baseTrackProducers.at(i)->profile(), m_baseTrackProducers.at(i)->get("resource")); if (m_properties.contains("force_aspect_ratio")) m_videoOnlyProducer->set("force_aspect_ratio", m_properties.value("force_aspect_ratio").toDouble()); if (m_properties.contains("threads")) m_videoOnlyProducer->set("threads", m_properties.value("threads").toInt()); m_videoOnlyProducer->set("audio_index", -1); if (m_properties.contains("video_index")) m_videoOnlyProducer->set("video_index", m_properties.value("video_index").toInt()); char *tmp = (char *) qstrdup(QString(getId() + "_video").toUtf8().data()); m_videoOnlyProducer->set("id", tmp); delete[] tmp; } return m_videoOnlyProducer; } Mlt::Producer *DocClipBase::producer(int track) { /*for (int i = 0; i < m_baseTrackProducers.count(); i++) { if (m_baseTrackProducers.at(i)) kDebug() << "// PROD: " << i << ", ID: " << m_baseTrackProducers.at(i)->get("id"); }*/ if (track == -1 || (m_clipType != AUDIO && m_clipType != AV)) { if (m_baseTrackProducers.count() == 0) return NULL; for (int i = 0; i < m_baseTrackProducers.count(); i++) { if (m_baseTrackProducers.at(i) != NULL) return m_baseTrackProducers.at(i); } return NULL; } if (track >= m_baseTrackProducers.count()) { while (m_baseTrackProducers.count() - 1 < track) { m_baseTrackProducers.append(NULL); } } if (m_baseTrackProducers.at(track) == NULL) { int i; for (i = 0; i < m_baseTrackProducers.count(); i++) if (m_baseTrackProducers.at(i) != NULL) break; if (i >= m_baseTrackProducers.count()) return NULL; if (KIO::NetAccess::exists(KUrl(m_baseTrackProducers.at(i)->get("resource")), KIO::NetAccess::SourceSide, 0)) m_baseTrackProducers[track] = new Mlt::Producer(*m_baseTrackProducers.at(i)->profile(), m_baseTrackProducers.at(i)->get("resource")); else { // special case for placeholder clips m_baseTrackProducers[track] = NULL; return NULL; } if (m_properties.contains("force_aspect_ratio")) m_baseTrackProducers[track]->set("force_aspect_ratio", m_properties.value("force_aspect_ratio").toDouble()); if (m_properties.contains("threads")) m_baseTrackProducers[track]->set("threads", m_properties.value("threads").toInt()); if (m_properties.contains("video_index")) m_baseTrackProducers[track]->set("video_index", m_properties.value("video_index").toInt()); if (m_properties.contains("audio_index")) m_baseTrackProducers[track]->set("audio_index", m_properties.value("audio_index").toInt()); char *tmp = (char *) qstrdup(QString(getId() + '_' + QString::number(track)).toUtf8().data()); m_baseTrackProducers[track]->set("id", tmp); delete[] tmp; if (KdenliveSettings::dropbframes() && m_baseTrackProducers.at(i)->get("skip_loop_filter") && strcmp(m_baseTrackProducers.at(i)->get("skip_loop_filter"), "all") == 0) { m_baseTrackProducers[track]->set("skip_loop_filter", "all"); m_baseTrackProducers[track]->set("skip_frame", "bidir"); } } return m_baseTrackProducers.at(track); } void DocClipBase::setProducerProperty(const char *name, int data) { for (int i = 0; i < m_baseTrackProducers.count(); i++) { if (m_baseTrackProducers.at(i) != NULL) m_baseTrackProducers[i]->set(name, data); } } void DocClipBase::setProducerProperty(const char *name, const char *data) { for (int i = 0; i < m_baseTrackProducers.count(); i++) { if (m_baseTrackProducers.at(i) != NULL) m_baseTrackProducers[i]->set(name, data); } } const char *DocClipBase::producerProperty(const char *name) const { for (int i = 0; i < m_baseTrackProducers.count(); i++) { if (m_baseTrackProducers.at(i) != NULL) { return m_baseTrackProducers.at(i)->get(name); } } return NULL; } void DocClipBase::slotRefreshProducer() { if (m_baseTrackProducers.count() == 0) return; kDebug() << "//////////// REFRESH CLIP !!!!!!!!!!!!!!!!"; if (m_clipType == SLIDESHOW) { /*char *tmp = (char *) qstrdup(getProperty("resource").toUtf8().data()); Mlt::Producer producer(*(m_clipProducer->profile()), tmp); delete[] tmp; delete m_clipProducer; m_clipProducer = new Mlt::Producer(producer.get_producer()); if (!getProperty("out").isEmpty()) m_clipProducer->set_in_and_out(getProperty("in").toInt(), getProperty("out").toInt());*/ setProducerProperty("ttl", getProperty("ttl").toInt()); //m_clipProducer->set("id", getProperty("id")); if (getProperty("fade") == "1") { // we want a fade filter effect kDebug() << "//////////// FADE WANTED"; Mlt::Service clipService(m_baseTrackProducers.at(0)->get_service()); int ct = 0; Mlt::Filter *filter = clipService.filter(ct); while (filter) { if (strcmp(filter->get("mlt_service"), "luma") == 0) { break; } ct++; filter = clipService.filter(ct); } if (filter && strcmp(filter->get("mlt_service"), "luma") == 0) { filter->set("period", getProperty("ttl").toInt() - 1); filter->set("luma.out", getProperty("luma_duration").toInt()); QString resource = getProperty("luma_file"); char *tmp = (char *) qstrdup(resource.toUtf8().data()); filter->set("luma.resource", tmp); delete[] tmp; if (!getProperty("softness").isEmpty()) { int soft = getProperty("softness").toInt(); filter->set("luma.softness", (double) soft / 100.0); } } else { // filter does not exist, create it... Mlt::Filter *filter = new Mlt::Filter(*(m_baseTrackProducers.at(0)->profile()), "luma"); filter->set("period", getProperty("ttl").toInt() - 1); filter->set("luma.out", getProperty("luma_duration").toInt()); QString resource = getProperty("luma_file"); char *tmp = (char *) qstrdup(resource.toUtf8().data()); filter->set("luma.resource", tmp); delete[] tmp; if (!getProperty("softness").isEmpty()) { int soft = getProperty("softness").toInt(); filter->set("luma.softness", (double) soft / 100.0); } clipService.attach(*filter); } } else { kDebug() << "//////////// FADE NOT WANTED!!!"; Mlt::Service clipService(m_baseTrackProducers.at(0)->get_service()); int ct = 0; Mlt::Filter *filter = clipService.filter(0); while (filter) { if (strcmp(filter->get("mlt_service"), "luma") == 0) { clipService.detach(*filter); } else ct++; filter = clipService.filter(ct); } } } } void DocClipBase::setProperties(QMap <QString, QString> properties) { // changing clip type is not allowed properties.remove("type"); QMapIterator<QString, QString> i(properties); bool refreshProducer = false; QStringList keys; keys << "luma_duration" << "luma_file" << "fade" << "ttl" << "softness"; while (i.hasNext()) { i.next(); setProperty(i.key(), i.value()); if (m_clipType == SLIDESHOW && keys.contains(i.key())) refreshProducer = true; } if (refreshProducer) slotRefreshProducer(); } void DocClipBase::setMetadata(QMap <QString, QString> properties) { m_metadata = properties; } QMap <QString, QString> DocClipBase::metadata() const { return m_metadata; } void DocClipBase::clearProperty(const QString &key) { m_properties.remove(key); } void DocClipBase::getFileHash(const QString url) { if (m_clipType == SLIDESHOW) return; QFile file(url); if (file.open(QIODevice::ReadOnly)) { // write size and hash only if resource points to a file QByteArray fileData; QByteArray fileHash; //kDebug() << "SETTING HASH of" << value; m_properties.insert("file_size", QString::number(file.size())); /* * 1 MB = 1 second per 450 files (or faster) * 10 MB = 9 seconds per 450 files (or faster) */ if (file.size() > 1000000*2) { fileData = file.read(1000000); if (file.seek(file.size() - 1000000)) fileData.append(file.readAll()); } else fileData = file.readAll(); file.close(); fileHash = QCryptographicHash::hash(fileData, QCryptographicHash::Md5); m_properties.insert("file_hash", QString(fileHash.toHex())); //kDebug() << file.fileName() << file.size() << fileHash.toHex(); } } QString DocClipBase::getClipHash() const { QString hash; if (m_clipType == SLIDESHOW) hash = QCryptographicHash::hash(m_properties.value("resource").toAscii().data(), QCryptographicHash::Md5).toHex(); else if (m_clipType == COLOR) hash = QCryptographicHash::hash(m_properties.value("colour").toAscii().data(), QCryptographicHash::Md5).toHex(); else hash = m_properties.value("file_hash"); return hash; } void DocClipBase::refreshThumbUrl() { if (m_thumbProd) m_thumbProd->updateThumbUrl(m_properties.value("file_hash")); } void DocClipBase::setProperty(const QString &key, const QString &value) { m_properties.insert(key, value); if (key == "resource") { getFileHash(value); if (m_thumbProd) m_thumbProd->updateClipUrl(KUrl(value), m_properties.value("file_hash")); } else if (key == "out") setDuration(GenTime(value.toInt(), KdenliveSettings::project_fps())); //else if (key == "transparency") m_clipProducer->set("transparency", value.toInt()); else if (key == "colour") { char *tmp = (char *) qstrdup(value.toUtf8().data()); setProducerProperty("colour", tmp); delete[] tmp; } else if (key == "xmldata") { setProducerProperty("force_reload", 1); } else if (key == "force_aspect_ratio") { if (value.isEmpty()) { m_properties.remove("force_aspect_ratio"); setProducerProperty("force_aspect_ratio", 0); } else setProducerProperty("force_aspect_ratio", value.toDouble()); } else if (key == "threads") { if (value.isEmpty()) { m_properties.remove("threads"); setProducerProperty("threads", 1); } else setProducerProperty("threads", value.toInt()); } else if (key == "video_index") { if (value.isEmpty()) { m_properties.remove("video_index"); setProducerProperty("video_index", m_properties.value("default_video").toInt()); } else setProducerProperty("video_index", value.toInt()); } else if (key == "audio_index") { if (value.isEmpty()) { m_properties.remove("audio_index"); setProducerProperty("audio_index", m_properties.value("default_audio").toInt()); } else setProducerProperty("audio_index", value.toInt()); } } QMap <QString, QString> DocClipBase::properties() const { return m_properties; } bool DocClipBase::slotGetAudioThumbs() { if (m_thumbProd == NULL) return false; if (!KdenliveSettings::audiothumbnails()) { if (m_audioTimer != NULL) m_audioTimer->stop(); return false; } if (m_audioThumbCreated) { if (m_audioTimer != NULL) m_audioTimer->stop(); return false; } if (m_audioTimer != NULL) m_audioTimer->start(1500); double lengthInFrames = duration().frames(KdenliveSettings::project_fps()); m_thumbProd->getAudioThumbs(2, 0, lengthInFrames /*must be number of frames*/, 20); return true; } bool DocClipBase::isPlaceHolder() const { return m_placeHolder; }