--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/gst_plugins_good/gst/camerabin/camerabingeneral.c Wed Sep 01 12:16:41 2010 +0100
@@ -0,0 +1,263 @@
+/*
+ * 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);
+ bin_pad = gst_bin_find_unconnected_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;
+}