-/**************************1*************************************************
- DocClipBase.cpp - description
- -------------------
- begin : Fri Apr 12 2002
- copyright : (C) 2002 by Jason Wood
- copyright : (C) 2009 by Jean-Baptiste Mardelle
-
- ***************************************************************************/
-
/***************************************************************************
+ * 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 <QCryptographicHash>
-DocClipBase::DocClipBase(ClipManager *clipManager, QDomElement xml, const QString &id):
- m_id(id), m_description(QString()), m_refcount(0), m_audioThumbCreated(false), m_duration(GenTime()), m_thumbProd(NULL), m_audioTimer(NULL), m_properties(QMap <QString, QString> ()), audioFrameChache(QMap<int, QMap<int, QByteArray> > ()), m_baseTrackProducers(QList <Mlt::Producer *>()), m_snapMarkers(QList < CommentedTime > ()) {
+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 (unsigned int i = 0; i < attributes.count(); i++) {
+ 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());
- int out = xml.attribute("out").toInt();
- if (out != 0) {
- setDuration(GenTime(out, KdenliveSettings::project_fps()));
+
+ if (xml.hasAttribute("duration")) {
+ setDuration(GenTime(xml.attribute("duration").toInt(), KdenliveSettings::project_fps()));
} else {
- out = xml.attribute("duration").toInt();
- if (out != 0) setDuration(GenTime(out, KdenliveSettings::project_fps()));
+ 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()))
return *this;
}*/
-DocClipBase::~DocClipBase() {
- if (m_thumbProd) {
- delete m_thumbProd;
- }
+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) {
+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 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() {
+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() {
+void DocClipBase::askForAudioThumbs()
+{
if (m_thumbProd) m_thumbProd->askForAudioThumbs(getId());
}
-void DocClipBase::slotClearAudioCache() {
+void DocClipBase::slotClearAudioCache()
+{
if (m_thumbProd) m_thumbProd->stopAudioThumbs();
if (m_audioTimer != NULL) m_audioTimer->stop();
- audioFrameChache.clear();
+ m_audioFrameCache.clear();
m_audioThumbCreated = false;
}
if (m_thumbProd) m_thumbProd->getMainThumb(m_properties.value("thumbnail").toInt());
}*/
-KThumb *DocClipBase::thumbProducer() {
+KThumb *DocClipBase::thumbProducer()
+{
return m_thumbProd;
}
-bool DocClipBase::audioThumbCreated() const {
+bool DocClipBase::audioThumbCreated() const
+{
return m_audioThumbCreated;
}
-const QString & DocClipBase::name() const {
+const QString DocClipBase::name() const
+{
return m_properties.value("name");
}
-const QString &DocClipBase::getId() const {
+const QString &DocClipBase::getId() const
+{
return m_id;
}
-void DocClipBase::setId(const QString &newId) {
+void DocClipBase::setId(const QString &newId)
+{
m_id = newId;
}
-const CLIPTYPE & DocClipBase::clipType() const {
+const CLIPTYPE & DocClipBase::clipType() const
+{
return m_clipType;
}
-void DocClipBase::setClipType(CLIPTYPE type) {
+void DocClipBase::setClipType(CLIPTYPE type)
+{
m_clipType = type;
m_properties.insert("type", QString::number((int) type));
slotCreateAudioTimer();
}
-KUrl DocClipBase::fileURL() const {
+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) {
+void DocClipBase::setClipThumbFrame(const uint &ix)
+{
m_properties.insert("thumbnail", QString::number((int) ix));
}
-uint DocClipBase::getClipThumbFrame() const {
+uint DocClipBase::getClipThumbFrame() const
+{
return (uint) m_properties.value("thumbnail").toInt();
}
-const QString DocClipBase::description() const {
+const QString DocClipBase::description() const
+{
return m_properties.value("description");
}
-bool DocClipBase::isTransparent() const {
+bool DocClipBase::isTransparent() const
+{
return (m_properties.value("transparency") == "1");
}
-const QString DocClipBase::getProperty(const QString prop) const {
+const QString DocClipBase::getProperty(const QString prop) const
+{
return m_properties.value(prop);
}
-void DocClipBase::setDuration(GenTime dur) {
+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 {
+const GenTime &DocClipBase::duration() const
+{
return m_duration;
}
-const GenTime DocClipBase::maxDuration() const {
+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 {
+bool DocClipBase::hasFileSize() const
+{
return true;
}
// virtual
-QDomElement DocClipBase::toXML() const {
+QDomElement DocClipBase::toXML() const
+{
QDomDocument doc;
QDomElement clip = doc.createElement("producer");
return doc.documentElement();
}
-DocClipBase *DocClipBase::
-createClip(KdenliveDoc *doc, const QDomElement & element) {
- DocClipBase *clip = 0;
- QString description;
- QDomNode node = element;
- node.normalize();
- if (element.tagName() != "kdenliveclip") {
- kWarning() <<
- "DocClipBase::createClip() element has unknown tagName : " << element.tagName();
- return 0;
- }
-
- QDomNode n = element.firstChild();
-
- while (!n.isNull()) {
- QDomElement e = n.toElement();
- if (!e.isNull()) {
- QString tagName = e.tagName();
- if (e.tagName() == "avfile") {
- // clip = DocClipAVFile::createClip(e);
- } else if (e.tagName() == "DocTrackBaseList") {
- // clip = DocClipProject::createClip(doc, e);
- }
- } else {
- QDomText text = n.toText();
- if (!text.isNull()) {
- description = text.nodeValue();
- }
- }
-
- n = n.nextSibling();
- }
- if (clip == 0) {
- kWarning() << "DocClipBase::createClip() unable to create clip";
- } else {
- // setup DocClipBase specifics of the clip.
- QMap <QString, QString> props;
- props.insert("description", description);
- clip->setProperties(props);
- clip->setAudioThumbCreated(false);
- }
- return clip;
-}
-void DocClipBase::setAudioThumbCreated(bool isDone) {
+void DocClipBase::setAudioThumbCreated(bool isDone)
+{
m_audioThumbCreated = isDone;
}
-void DocClipBase::setThumbnail(const QPixmap & pixmap) {
+void DocClipBase::setThumbnail(const QPixmap & pixmap)
+{
m_thumbnail = pixmap;
}
-const QPixmap & DocClipBase::thumbnail() const {
+const QPixmap & DocClipBase::thumbnail() const
+{
return m_thumbnail;
}
-void DocClipBase::updateAudioThumbnail(QMap<int, QMap<int, QByteArray> > data) {
+void DocClipBase::updateAudioThumbnail(QMap<int, QMap<int, QByteArray> > data)
+{
//kDebug() << "CLIPBASE RECIEDVED AUDIO DATA*********************************************";
- audioFrameChache = data;
+ m_audioFrameCache = data;
m_audioThumbCreated = true;
emit gotAudioData();
}
-QList < GenTime > DocClipBase::snapMarkers() const {
+QList < GenTime > DocClipBase::snapMarkers() const
+{
QList < GenTime > markers;
- for (uint count = 0; count < m_snapMarkers.count(); ++count) {
+ for (int count = 0; count < m_snapMarkers.count(); ++count) {
markers.append(m_snapMarkers[count].time());
}
return markers;
}
-QList < CommentedTime > DocClipBase::commentedSnapMarkers() const {
+QList < CommentedTime > DocClipBase::commentedSnapMarkers() const
+{
return m_snapMarkers;
}
-void DocClipBase::setSnapMarkers(QList < CommentedTime > markers) {
+void DocClipBase::setSnapMarkers(QList < CommentedTime > markers)
+{
m_snapMarkers = markers;
}
-void DocClipBase::addSnapMarker(const GenTime & time, QString comment) {
+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)
}
-void DocClipBase::editSnapMarker(const GenTime & time, QString comment) {
+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)
}
}
-QString DocClipBase::deleteSnapMarker(const GenTime & time) {
+QString DocClipBase::deleteSnapMarker(const GenTime & time)
+{
QString result = i18n("Marker");
QList < CommentedTime >::Iterator itt = m_snapMarkers.begin();
}
-GenTime DocClipBase::hasSnapMarkers(const GenTime & time) {
+GenTime DocClipBase::hasSnapMarkers(const GenTime & time)
+{
QList < CommentedTime >::Iterator itt = m_snapMarkers.begin();
while (itt != m_snapMarkers.end()) {
return GenTime(0.0);
}
-GenTime DocClipBase::findPreviousSnapMarker(const GenTime & currTime) {
+GenTime DocClipBase::findPreviousSnapMarker(const GenTime & currTime)
+{
int it;
for (it = 0; it < m_snapMarkers.count(); it++) {
if (m_snapMarkers[it].time() >= currTime)
else return m_snapMarkers[it-1].time();
}
-GenTime DocClipBase::findNextSnapMarker(const GenTime & currTime) {
+GenTime DocClipBase::findNextSnapMarker(const GenTime & currTime)
+{
int it;
for (it = 0; it < m_snapMarkers.count(); it++) {
if (m_snapMarkers[it].time() > currTime)
return duration();
}
-QString DocClipBase::markerComment(GenTime t) {
+QString DocClipBase::markerComment(GenTime t)
+{
QList < CommentedTime >::Iterator itt = m_snapMarkers.begin();
while (itt != m_snapMarkers.end()) {
return QString();
}
-void DocClipBase::deleteProducers() {
+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) {
+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
- int pos = id.section('_', 1, 1).toInt();
+ 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_thumbProd && !m_thumbProd->hasProducer()) m_thumbProd->setProducer(producer);
}
-Mlt::Producer *DocClipBase::producer(int track) {
+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;
- int i;
for (int i = 0; i < m_baseTrackProducers.count(); i++) {
if (m_baseTrackProducers.at(i) != NULL)
return m_baseTrackProducers.at(i);
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_baseTrackProducers[track] = new Mlt::Producer(*m_baseTrackProducers.at(i)->profile(), m_baseTrackProducers.at(i)->get("resource"));
+
+ // special case for placeholder clips
+ if (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());
return m_baseTrackProducers.at(track);
}
-void DocClipBase::setProducerProperty(const char *name, int data) {
+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) {
+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 {
+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);
}
-void DocClipBase::slotRefreshProducer() {
+void DocClipBase::slotRefreshProducer()
+{
if (m_baseTrackProducers.count() == 0) return;
kDebug() << "//////////// REFRESH CLIP !!!!!!!!!!!!!!!!";
if (m_clipType == SLIDESHOW) {
int ct = 0;
Mlt::Filter *filter = clipService.filter(ct);
while (filter) {
- if (filter->get("mlt_service") == "luma") {
+ if (strcmp(filter->get("mlt_service"), "luma") == 0) {
break;
}
ct++;
filter = clipService.filter(ct);
}
- if (filter && filter->get("mlt_service") == "luma") {
+ 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");
int ct = 0;
Mlt::Filter *filter = clipService.filter(0);
while (filter) {
- if (filter->get("mlt_service") == "luma") {
+ if (strcmp(filter->get("mlt_service"), "luma") == 0) {
clipService.detach(*filter);
} else ct++;
filter = clipService.filter(ct);
}
}
-void DocClipBase::setProperties(QMap <QString, QString> properties) {
+void DocClipBase::setProperties(QMap <QString, QString> properties)
+{
// changing clip type is not allowed
properties.remove("type");
QMapIterator<QString, QString> i(properties);
if (refreshProducer) slotRefreshProducer();
}
-void DocClipBase::setMetadata(QMap <QString, QString> properties) {
+void DocClipBase::setMetadata(QMap <QString, QString> properties)
+{
m_metadata = properties;
}
-QMap <QString, QString> DocClipBase::metadata() const {
+QMap <QString, QString> DocClipBase::metadata() const
+{
return m_metadata;
}
-void DocClipBase::clearProperty(const QString &key) {
+void DocClipBase::clearProperty(const QString &key)
+{
m_properties.remove(key);
}
-void DocClipBase::getFileHash(const QString &url) {
+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
}
}
-QString DocClipBase::getClipHash() const {
+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();
return hash;
}
-void DocClipBase::refreshThumbUrl() {
+void DocClipBase::refreshThumbUrl()
+{
if (m_thumbProd) m_thumbProd->updateThumbUrl(m_properties.value("file_hash"));
}
-void DocClipBase::setProperty(const QString &key, const QString &value) {
+void DocClipBase::setProperty(const QString &key, const QString &value)
+{
m_properties.insert(key, value);
if (key == "resource") {
getFileHash(value);
}
}
-QMap <QString, QString> DocClipBase::properties() const {
+QMap <QString, QString> DocClipBase::properties() const
+{
return m_properties;
}
-bool DocClipBase::slotGetAudioThumbs() {
+bool DocClipBase::slotGetAudioThumbs()
+{
if (m_thumbProd == NULL) return false;
if (!KdenliveSettings::audiothumbnails()) {
if (m_audioTimer != NULL) m_audioTimer->stop();
return true;
}
-
+bool DocClipBase::isPlaceHolder() const
+{
+ return m_placeHolder;
+}
projects / kdenlive / blobdiff