/*!
* This file is part of CameraPlus.
*
- * Copyright (C) 2012 Mohammed Sameer <msameer@foolab.org>
+ * Copyright (C) 2012-2013 Mohammed Sameer <msameer@foolab.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
*/
#include "qtcamanalysisbin.h"
+#include <QStringList>
#include <QDebug>
+#include <QHash>
#define FACTORY_NAME(x) gst_plugin_feature_get_name(GST_PLUGIN_FEATURE(gst_element_get_factory(x)))
-GstElement *qt_cam_analysis_bin_create(QList<GstElement *>& children, const char *name) {
- GstElement *bin = 0;
+static QtCamAnalysisBinPrivate *qt_cam_analysis_bin_create(const QStringList& factories,
+ const char *name);
+static QtCamAnalysisBinPrivate *qt_cam_analysis_bin_create(GstElement *child,
+ const char *name);
- QList<GstElement *> added;
+class QtCamAnalysisBinPrivate {
+public:
+ QtCamAnalysisBinPrivate() :
+ bin(0),
+ probe(0),
+ queuePad(0) {
+
+ }
+
+ static gboolean block_buffers(GstPad *pad, GstMiniObject *o) {
+ Q_UNUSED(pad);
+ Q_UNUSED(o);
+
+ // Drop data
+ return FALSE;
+ }
+
+ GstElement *bin;
+ gulong probe;
+ GstPad *queuePad;
+ QMultiHash<QString, GstElement *> elements;
+};
+
+QtCamAnalysisBin::QtCamAnalysisBin(QtCamAnalysisBinPrivate *d) :
+ d_ptr(d) {
+ gst_object_ref(d_ptr->bin);
+}
+
+QtCamAnalysisBin::~QtCamAnalysisBin() {
+ d_ptr->elements.clear();
+
+ setBlocked(false);
+ gst_object_unref(GST_OBJECT(d_ptr->queuePad));
+ gst_object_unref(d_ptr->bin);
+ delete d_ptr; d_ptr = 0;
+}
+
+void QtCamAnalysisBin::setBlocked(bool blocked) {
+ if (blocked == isBlocked()) {
+ return;
+ }
+
+ if (blocked) {
+ d_ptr->probe = gst_pad_add_buffer_probe(d_ptr->queuePad,
+ G_CALLBACK(QtCamAnalysisBinPrivate::block_buffers),
+ d_ptr);
+ }
+ else {
+ gst_pad_remove_data_probe(d_ptr->queuePad, d_ptr->probe);
+ d_ptr->probe = 0;
+ }
+}
+
+bool QtCamAnalysisBin::isBlocked() const {
+ return d_ptr->probe != 0;
+}
- if (children.isEmpty()) {
+GstElement *QtCamAnalysisBin::bin() {
+ return d_ptr->bin;
+}
+
+QtCamAnalysisBin *QtCamAnalysisBin::create(const QStringList& factories, const char *name) {
+ QList<GstElement *> elements;
+ if (factories.isEmpty()) {
return 0;
}
- if (children.size() == 1) {
- return qt_cam_analysis_bin_create(children.takeFirst(), name);
+ QtCamAnalysisBinPrivate *d = qt_cam_analysis_bin_create(factories, name);
+ if (!d) {
+ return 0;
}
- bin = gst_bin_new("analysis_bin_bin");
+ return new QtCamAnalysisBin(d);
+}
+
+QtCamAnalysisBinPrivate *qt_cam_analysis_bin_create(const QStringList& factories,
+ const char *name) {
+
+ if (factories.isEmpty()) {
+ return 0;
+ }
+
+ GstElement *bin = 0;
+ QHash<QString, GstElement *> elements;
+ QList<GstElement *> added;
- while (!children.isEmpty()) {
- GstElement *elem = children.takeFirst();
+ bin = gst_bin_new("analysis-bin-bin");
- if (!gst_bin_add(GST_BIN(bin), elem)) {
- qWarning() << "Failed to add element" << FACTORY_NAME(elem) << "to bin";
- gst_object_unref(elem);
+ foreach (const QString& factory, factories) {
+ GstElement *element = gst_element_factory_make(factory.toUtf8().constData(), NULL);
+ if (!element) {
+ qWarning() << "Failed to create element" << factory;
+ continue;
}
- else {
- added << elem;
+
+ if (!gst_bin_add(GST_BIN(bin), element)) {
+ qWarning() << "Failed to add element" << factory << "to bin";
+ gst_object_unref(element);
}
+
+ elements.insert(factory, element);
+ added << element;
}
- for (int x = 1; x < added.count(); x++) {
- GstElement *elem = added[x];
- GstElement *prev = added[x - 1];
+ if (added.size() > 1) {
+ for (int x = 1; x < added.count(); x++) {
+ GstElement *elem = added[x];
+ GstElement *prev = added[x - 1];
- if (!gst_element_link(prev, elem)) {
- qWarning() << "Failed to link" << FACTORY_NAME(prev) << "and" << FACTORY_NAME(elem);
+ if (!gst_element_link(prev, elem)) {
+ qWarning() << "Failed to link" << FACTORY_NAME(prev) << "and" << FACTORY_NAME(elem);
+ }
}
}
gst_element_add_pad(bin, gst_ghost_pad_new("src", pad));
gst_object_unref(GST_OBJECT(pad));
- return qt_cam_analysis_bin_create(bin, name);
+ QtCamAnalysisBinPrivate *d = qt_cam_analysis_bin_create(bin, name);
+ if (!d) {
+ return 0;
+ }
+
+ d->elements = elements;
+
+ return d;
}
/*
* tee -
* -- queue -- copy -- filters -- fakesink
*/
-GstElement *qt_cam_analysis_bin_create(GstElement *child, const char *name) {
+QtCamAnalysisBinPrivate *qt_cam_analysis_bin_create(GstElement *child, const char *name) {
GstPad *pad = 0;
+ GstPad *queuePad = 0;
+ QtCamAnalysisBinPrivate *d = 0;
GstElement *bin = gst_bin_new(name);
g_object_set(tee, "alloc-pad", pad, NULL);
gst_object_unref(GST_OBJECT(pad));
- return bin;
+ queuePad = gst_element_get_static_pad(queue, "src");
+
+ d = new QtCamAnalysisBinPrivate;
+ d->queuePad = queuePad;
+ d->bin = bin;
+ return d;
free_and_out:
if (bin) {
return 0;
}
+
+QList<GstElement *> QtCamAnalysisBin::lookup(const QString& factory) {
+ if (d_ptr->elements.contains(factory)) {
+ return d_ptr->elements.values(factory);
+ }
+
+ return QList<GstElement *>();
+}