1 files changed, 262 insertions, 0 deletions
diff --git a/gst/camerabin/camerabingeneral.c b/gst/camerabin/camerabingeneral.c
new file mode 100644
index 00000000..627e0328
--- /dev/null
+++ b/gst/camerabin/camerabingeneral.c
@@ -0,0 +1,262 @@
+/*
+ * GStreamer
+ * Copyright (C) 2008 Nokia Corporation <multimedia@maemo.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+/**
+ * SECTION:camerabingeneral
+ * @short_description: helper functions for #GstCameraBin and it's modules
+ *
+ * Common helper functions for #GstCameraBin, #GstCameraBinImage and
+ * #GstCameraBinVideo.
+ *
+ */
+
+#include "camerabingeneral.h"
+#include <glib.h>
+
+GST_DEBUG_CATEGORY (gst_camerabin_debug);
+
+static gboolean
+camerabin_general_dbg_have_event (GstPad * pad, GstEvent * event,
+    gpointer u_data)
+{
+  switch (GST_EVENT_TYPE (event)) {
+    case GST_EVENT_NEWSEGMENT:
+    {
+      GstElement *elem = (GstElement *) u_data;
+      gchar *elem_name = gst_element_get_name (elem);
+      gchar *pad_name = gst_pad_get_name (pad);
+
+      gboolean update;
+      gdouble rate;
+      GstFormat format;
+      gint64 start, stop, pos;
+      gst_event_parse_new_segment (event, &update, &rate, &format, &start,
+          &stop, &pos);
+
+      GST_DEBUG ("element %s, pad %s, new_seg_start =%" GST_TIME_FORMAT
+          ", new_seg_stop =%" GST_TIME_FORMAT
+          ", new_seg_pos =%" GST_TIME_FORMAT "\n", elem_name, pad_name,
+          GST_TIME_ARGS (start), GST_TIME_ARGS (stop), GST_TIME_ARGS (pos));
+
+      g_free (pad_name);
+      g_free (elem_name);
+    }
+      break;
+    default:
+      break;
+  }
+
+  return TRUE;
+}
+
+static gboolean
+camerabin_general_dbg_have_buffer (GstPad * pad, GstBuffer * buffer,
+    gpointer u_data)
+{
+  GstElement *elem = (GstElement *) u_data;
+  gchar *elem_name = gst_element_get_name (elem);
+  gchar *pad_name = gst_pad_get_name (pad);
+
+  GST_DEBUG ("element %s, pad %s, buf_ts =%" GST_TIME_FORMAT "\n", elem_name,
+      pad_name, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer)));
+
+  g_free (pad_name);
+  g_free (elem_name);
+
+  return TRUE;
+
+}
+
+void
+camerabin_general_dbg_set_probe (GstElement * elem, gchar * pad_name,
+    gboolean buf, gboolean evt)
+{
+  GstPad *pad = gst_element_get_static_pad (elem, pad_name);
+
+  if (buf)
+    gst_pad_add_buffer_probe (pad,
+        G_CALLBACK (camerabin_general_dbg_have_buffer), elem);
+  if (evt)
+    gst_pad_add_event_probe (pad,
+        G_CALLBACK (camerabin_general_dbg_have_event), elem);
+
+  gst_object_unref (pad);
+}
+
+/**
+ * gst_camerabin_add_element:
+ * @bin: add an element to this bin
+ * @new_elem: new element to be added
+ *
+ * Adds given element to given @bin. Looks for an unconnected src pad
+ * from the @bin and links the element to it.  Raises an error if adding
+ * or linking failed.
+ *
+ * Returns: %TRUE if adding and linking succeeded, %FALSE otherwise.
+ */
+gboolean
+gst_camerabin_add_element (GstBin * bin, GstElement * new_elem)
+{
+  gboolean ret = FALSE;
+
+  ret = gst_camerabin_try_add_element (bin, new_elem);
+
+  if (!ret) {
+    gchar *elem_name = gst_element_get_name (new_elem);
+    GST_ELEMENT_ERROR (bin, CORE, NEGOTIATION, (NULL),
+        ("linking %s failed", elem_name));
+    g_free (elem_name);
+  }
+
+  return ret;
+}
+
+/**
+ * gst_camerabin_try_add_element:
+ * @bin: tries adding an element to this bin
+ * @new_elem: new element to be added
+ *
+ * Adds given element to given @bin. Looks for an unconnected src pad
+ * from the @bin and links the element to it.
+ *
+ * Returns: %TRUE if adding and linking succeeded, %FALSE otherwise.
+ */
+gboolean
+gst_camerabin_try_add_element (GstBin * bin, GstElement * new_elem)
+{
+  GstPad *bin_pad;
+  GstElement *bin_elem;
+  gboolean ret = TRUE;
+
+  if (!bin || !new_elem) {
+    return FALSE;
+  }
+
+  /* Get pads for linking */
+  GST_DEBUG ("finding unconnected src pad");
+  bin_pad = gst_bin_find_unlinked_pad (bin, GST_PAD_SRC);
+  GST_DEBUG ("unconnected pad %s:%s", GST_DEBUG_PAD_NAME (bin_pad));
+  /* Add to bin */
+  gst_bin_add (GST_BIN (bin), new_elem);
+  /* Link, if unconnected pad was found, otherwise just add it to bin */
+  if (bin_pad) {
+    bin_elem = gst_pad_get_parent_element (bin_pad);
+    gst_object_unref (bin_pad);
+    if (!gst_element_link (bin_elem, new_elem)) {
+      gst_bin_remove (bin, new_elem);
+      ret = FALSE;
+    }
+    gst_object_unref (bin_elem);
+  }
+
+  return ret;
+}
+
+/**
+ * gst_camerabin_create_and_add_element:
+ * @bin: tries adding an element to this bin
+ * @elem_name: name of the element to be created
+ *
+ * Creates an element according to given name and
+ * adds it to given @bin. Looks for an unconnected src pad
+ * from the @bin and links the element to it.
+ *
+ * Returns: pointer to the new element if successful, NULL otherwise.
+ */
+GstElement *
+gst_camerabin_create_and_add_element (GstBin * bin, const gchar * elem_name)
+{
+  GstElement *new_elem = NULL;
+
+  GST_DEBUG ("adding %s", elem_name);
+  new_elem = gst_element_factory_make (elem_name, NULL);
+  if (!new_elem) {
+    GST_ELEMENT_ERROR (bin, CORE, MISSING_PLUGIN, (NULL),
+        ("could not create \"%s\" element.", elem_name));
+  } else if (!gst_camerabin_add_element (bin, new_elem)) {
+    new_elem = NULL;
+  }
+
+  return new_elem;
+}
+
+/**
+ * gst_camerabin_remove_elements_from_bin:
+ * @bin: removes all elements from this bin
+ *
+ * Removes all elements from this @bin.
+ */
+void
+gst_camerabin_remove_elements_from_bin (GstBin * bin)
+{
+  GstIterator *iter = NULL;
+  gpointer data = NULL;
+  GstElement *elem = NULL;
+  gboolean done = FALSE;
+
+  iter = gst_bin_iterate_elements (bin);
+  while (!done) {
+    switch (gst_iterator_next (iter, &data)) {
+      case GST_ITERATOR_OK:
+        elem = GST_ELEMENT (data);
+        gst_bin_remove (bin, elem);
+        /* Iterator increased the element refcount, so unref */
+        gst_object_unref (elem);
+        break;
+      case GST_ITERATOR_RESYNC:
+        gst_iterator_resync (iter);
+        break;
+      case GST_ITERATOR_ERROR:
+        GST_WARNING_OBJECT (bin, "error in iterating elements");
+        done = TRUE;
+        break;
+      case GST_ITERATOR_DONE:
+        done = TRUE;
+        break;
+    }
+  }
+  gst_iterator_free (iter);
+}
+
+/**
+ * gst_camerabin_drop_eos_probe:
+ * @pad: pad receiving the event
+ * @event: received event
+ * @u_data: not used
+ *
+ * Event probe that drop all eos events.
+ *
+ * Returns: FALSE to drop the event, TRUE otherwise
+ */
+gboolean
+gst_camerabin_drop_eos_probe (GstPad * pad, GstEvent * event, gpointer u_data)
+{
+  gboolean ret = TRUE;
+
+  switch (GST_EVENT_TYPE (event)) {
+    case GST_EVENT_EOS:
+      GST_DEBUG ("dropping eos in %s:%s", GST_DEBUG_PAD_NAME (pad));
+      ret = FALSE;
+      break;
+    default:
+      break;
+  }
+  return ret;
+}