Added QtCamFlash::ready to indicate readiness of flash

[harmattan/cameraplus] / lib / qtcamflash_p.h

diff --git a/lib/qtcamflash_p.h b/lib/qtcamflash_p.h
new file mode 100644 (file)
index 0000000..ba2cfae
--- /dev/null
+++ b/lib/qtcamflash_p.h
@@ -0,0 +1,96 @@
+// -*- c++ -*-
+
+/*!
+ * This file is part of CameraPlus.
+ *
+ * Copyright (C) 2012 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
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifndef QT_CAM_FLASH_P_H
+#define QT_CAM_FLASH_P_H
+
+#include <QObject>
+#include "qtcamcapability_p.h"
+#include "qtcamdevice.h"
+#include "qtcamgstreamermessagelistener.h"
+#include "qtcamgstreamermessagehandler.h"
+#include <QDebug>
+
+// subdevsrc ./gst-libs/gst/camera/gstcamerasrc2.h
+#define FLASH_STATUS_READY        0
+#define FLASH_STATUS_NOT_READY    1
+
+class QtCamFlashPrivate : public QObject, public QtCamCapabilityPrivate {
+  Q_OBJECT
+
+public:
+  QtCamFlashPrivate(QtCamDevice *dev, QObject *parent = 0) :
+    QObject(parent),
+    QtCamCapabilityPrivate(dev, QtCamCapability::Flash, "flash-mode"),
+    ready(true) {
+
+  }
+
+  ~QtCamFlashPrivate() {
+
+  }
+
+  void init() {
+    QtCamGStreamerMessageListener *listener = dev->listener();
+    if (!listener) {
+      qWarning() << "Failed to get device listener. flash ready status will not be available";
+      return;
+    }
+
+    QtCamGStreamerMessageHandler *handler = new QtCamGStreamerMessageHandler("flash-status", this);
+    QObject::connect(handler, SIGNAL(messageSent(GstMessage *)),
+                    this, SLOT(messageSent(GstMessage *)));
+    listener->addHandler(handler);
+  }
+
+  bool isReady() const {
+    return ready;
+  }
+
+signals:
+  void flashReadyChanged();
+
+private slots:
+  void messageSent(GstMessage *message) {
+    const GstStructure *s = gst_message_get_structure(message);
+    if (QLatin1String("flash-status") != QLatin1String(gst_structure_get_name(s))) {
+      return;
+    }
+
+    int status = FLASH_STATUS_NOT_READY;
+    if (!gst_structure_get_int(s, "status", &status)) {
+      return;
+    }
+
+    bool newStatus = (status == FLASH_STATUS_READY);
+
+    if (ready != newStatus) {
+      ready = newStatus;
+      emit flashReadyChanged();
+    }
+  }
+
+private:
+  bool ready;
+};
+
+#endif /* QT_CAM_FLASH_P_H */