--- /dev/null
+/*
+ * Farsight2 - Farsight Funnel element
+ *
+ * Copyright 2007 Collabora Ltd.
+ * @author: Olivier Crete <olivier.crete@collabora.co.uk>
+ * Copyright 2007 Nokia Corp.
+ *
+ * fs-funnel.c: Simple Funnel element
+ *
+ * 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
+ */
+
+/**
+ * SECTION:element-fsfunnel
+ * @short_description: N-to-1 simple funnel
+ *
+ * Takes packets from various input sinks into one output source
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include "fs-funnel.h"
+
+GST_DEBUG_CATEGORY_STATIC (fs_funnel_debug);
+#define GST_CAT_DEFAULT fs_funnel_debug
+
+static const GstElementDetails fs_funnel_details =
+GST_ELEMENT_DETAILS ("Farsight Funnel pipe fitting",
+ "Generic",
+ "N-to-1 pipe fitting",
+ "Olivier Crete <olivier.crete@collabora.co.uk>");
+
+static GstStaticPadTemplate funnel_sink_template =
+GST_STATIC_PAD_TEMPLATE ("sink%d",
+ GST_PAD_SINK,
+ GST_PAD_REQUEST,
+ GST_STATIC_CAPS_ANY);
+
+static GstStaticPadTemplate funnel_src_template =
+GST_STATIC_PAD_TEMPLATE ("src",
+ GST_PAD_SRC,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS_ANY);
+
+
+static void
+_do_init (GType type)
+{
+ GST_DEBUG_CATEGORY_INIT (fs_funnel_debug, "fsfunnel", 0, "fsfunnel element");
+}
+
+GST_BOILERPLATE_FULL (FsFunnel, fs_funnel, GstElement, GST_TYPE_ELEMENT,
+ _do_init);
+
+
+
+static GstStateChangeReturn fs_funnel_change_state (GstElement * element,
+ GstStateChange transition);
+
+static GstPad *fs_funnel_request_new_pad (GstElement * element,
+ GstPadTemplate * templ, const gchar * name);
+static void fs_funnel_release_pad (GstElement * element, GstPad * pad);
+
+static GstFlowReturn fs_funnel_chain (GstPad * pad, GstBuffer * buffer);
+static gboolean fs_funnel_event (GstPad * pad, GstEvent * event);
+static gboolean fs_funnel_src_event (GstPad * pad, GstEvent * event);
+static GstCaps *fs_funnel_getcaps (GstPad * pad);
+
+
+typedef struct
+{
+ GstSegment segment;
+} FsFunnelPadPrivate;
+
+static void
+fs_funnel_base_init (gpointer g_class)
+{
+ GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
+
+ gst_element_class_set_details (gstelement_class, &fs_funnel_details);
+
+ gst_element_class_add_pad_template (gstelement_class,
+ gst_static_pad_template_get (&funnel_sink_template));
+ gst_element_class_add_pad_template (gstelement_class,
+ gst_static_pad_template_get (&funnel_src_template));
+}
+
+
+static void
+fs_funnel_dispose (GObject * object)
+{
+ GList *item;
+
+restart:
+ for (item = GST_ELEMENT_PADS (object); item; item = g_list_next (item)) {
+ GstPad *pad = GST_PAD (item->data);
+
+ if (GST_PAD_IS_SINK (pad)) {
+ gst_element_release_request_pad (GST_ELEMENT (object), pad);
+ goto restart;
+ }
+ }
+
+ G_OBJECT_CLASS (parent_class)->dispose (object);
+}
+
+static void
+fs_funnel_class_init (FsFunnelClass * klass)
+{
+ GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
+ GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
+
+ gobject_class->dispose = GST_DEBUG_FUNCPTR (fs_funnel_dispose);
+
+ gstelement_class->request_new_pad =
+ GST_DEBUG_FUNCPTR (fs_funnel_request_new_pad);
+ gstelement_class->release_pad = GST_DEBUG_FUNCPTR (fs_funnel_release_pad);
+ gstelement_class->change_state = GST_DEBUG_FUNCPTR (fs_funnel_change_state);
+}
+
+static void
+fs_funnel_init (FsFunnel * funnel, FsFunnelClass * g_class)
+{
+ funnel->srcpad = gst_pad_new_from_static_template (&funnel_src_template,
+ "src");
+ gst_pad_set_event_function (funnel->srcpad, fs_funnel_src_event);
+ gst_pad_use_fixed_caps (funnel->srcpad);
+ gst_element_add_pad (GST_ELEMENT (funnel), funnel->srcpad);
+}
+
+
+static GstPad *
+fs_funnel_request_new_pad (GstElement * element, GstPadTemplate * templ,
+ const gchar * name)
+{
+ GstPad *sinkpad;
+ FsFunnelPadPrivate *priv = g_slice_alloc0 (sizeof (FsFunnelPadPrivate));
+
+ GST_DEBUG_OBJECT (element, "requesting pad");
+
+ sinkpad = gst_pad_new_from_template (templ, name);
+
+ gst_pad_set_chain_function (sinkpad, GST_DEBUG_FUNCPTR (fs_funnel_chain));
+ gst_pad_set_event_function (sinkpad, GST_DEBUG_FUNCPTR (fs_funnel_event));
+ gst_pad_set_getcaps_function (sinkpad, GST_DEBUG_FUNCPTR (fs_funnel_getcaps));
+
+ gst_segment_init (&priv->segment, GST_FORMAT_UNDEFINED);
+ gst_pad_set_element_private (sinkpad, priv);
+
+ gst_pad_set_active (sinkpad, TRUE);
+
+ gst_element_add_pad (element, sinkpad);
+
+ return sinkpad;
+}
+
+static void
+fs_funnel_release_pad (GstElement * element, GstPad * pad)
+{
+ FsFunnel *funnel = FS_FUNNEL (element);
+ FsFunnelPadPrivate *priv = gst_pad_get_element_private (pad);
+
+ GST_DEBUG_OBJECT (funnel, "releasing pad");
+
+ gst_pad_set_active (pad, FALSE);
+
+ if (priv)
+ g_slice_free1 (sizeof (FsFunnelPadPrivate), priv);
+
+ gst_element_remove_pad (GST_ELEMENT_CAST (funnel), pad);
+}
+
+static GstCaps *
+fs_funnel_getcaps (GstPad * pad)
+{
+ FsFunnel *funnel = FS_FUNNEL (gst_pad_get_parent (pad));
+ GstCaps *caps;
+
+ caps = gst_pad_peer_get_caps (funnel->srcpad);
+ if (caps == NULL)
+ caps = gst_caps_copy (gst_pad_get_pad_template_caps (pad));
+
+ gst_object_unref (funnel);
+
+ return caps;
+}
+
+static GstFlowReturn
+fs_funnel_chain (GstPad * pad, GstBuffer * buffer)
+{
+ GstFlowReturn res;
+ FsFunnel *funnel = FS_FUNNEL (gst_pad_get_parent (pad));
+ FsFunnelPadPrivate *priv = gst_pad_get_element_private (pad);
+ GstEvent *event = NULL;
+ GstClockTime newts;
+ GstCaps *padcaps;
+
+ GST_DEBUG_OBJECT (funnel, "received buffer %p", buffer);
+
+ GST_OBJECT_LOCK (funnel);
+ if (priv->segment.format == GST_FORMAT_UNDEFINED) {
+ GST_WARNING_OBJECT (funnel, "Got buffer without segment,"
+ " setting segment [0,inf[");
+ gst_segment_set_newsegment_full (&priv->segment, FALSE, 1.0, 1.0,
+ GST_FORMAT_TIME, 0, -1, 0);
+ }
+
+ if (GST_CLOCK_TIME_IS_VALID (GST_BUFFER_TIMESTAMP (buffer)))
+ gst_segment_set_last_stop (&priv->segment, priv->segment.format,
+ GST_BUFFER_TIMESTAMP (buffer));
+
+ newts = gst_segment_to_running_time (&priv->segment,
+ priv->segment.format, GST_BUFFER_TIMESTAMP (buffer));
+ if (newts != GST_BUFFER_TIMESTAMP (buffer)) {
+ buffer = gst_buffer_make_metadata_writable (buffer);
+ GST_BUFFER_TIMESTAMP (buffer) = newts;
+ }
+
+ if (!funnel->has_segment) {
+ event = gst_event_new_new_segment_full (FALSE, 1.0, 1.0, GST_FORMAT_TIME,
+ 0, -1, 0);
+ funnel->has_segment = TRUE;
+ }
+ GST_OBJECT_UNLOCK (funnel);
+
+ if (event) {
+ if (!gst_pad_push_event (funnel->srcpad, event)) {
+ GST_WARNING_OBJECT (funnel, "Could not push out newsegment event");
+ res = GST_FLOW_ERROR;
+ goto out;
+ }
+ }
+
+
+ GST_OBJECT_LOCK (pad);
+ padcaps = GST_PAD_CAPS (funnel->srcpad);
+ GST_OBJECT_UNLOCK (pad);
+
+ if (GST_BUFFER_CAPS (buffer) && GST_BUFFER_CAPS (buffer) != padcaps) {
+ if (!gst_pad_set_caps (funnel->srcpad, GST_BUFFER_CAPS (buffer))) {
+ res = GST_FLOW_NOT_NEGOTIATED;
+ goto out;
+ }
+ }
+
+ res = gst_pad_push (funnel->srcpad, buffer);
+
+ GST_LOG_OBJECT (funnel, "handled buffer %s", gst_flow_get_name (res));
+
+out:
+ gst_object_unref (funnel);
+
+ return res;
+}
+
+static gboolean
+fs_funnel_event (GstPad * pad, GstEvent * event)
+{
+ FsFunnel *funnel = FS_FUNNEL (gst_pad_get_parent (pad));
+ FsFunnelPadPrivate *priv = gst_pad_get_element_private (pad);
+ gboolean forward = TRUE;
+ gboolean res = TRUE;
+
+ switch (GST_EVENT_TYPE (event)) {
+ case GST_EVENT_NEWSEGMENT:
+ {
+ gboolean update;
+ gdouble rate, arate;
+ GstFormat format;
+ gint64 start;
+ gint64 stop;
+ gint64 time;
+
+ gst_event_parse_new_segment_full (event, &update, &rate, &arate,
+ &format, &start, &stop, &time);
+
+
+ GST_OBJECT_LOCK (funnel);
+ gst_segment_set_newsegment_full (&priv->segment, update, rate, arate,
+ format, start, stop, time);
+ GST_OBJECT_UNLOCK (funnel);
+
+ forward = FALSE;
+ gst_event_unref (event);
+ }
+ break;
+ case GST_EVENT_FLUSH_STOP:
+ {
+ GST_OBJECT_LOCK (funnel);
+ gst_segment_init (&priv->segment, GST_FORMAT_UNDEFINED);
+ GST_OBJECT_UNLOCK (funnel);
+ }
+ break;
+ default:
+ break;
+ }
+
+
+ if (forward)
+ res = gst_pad_push_event (funnel->srcpad, event);
+
+ gst_object_unref (funnel);
+
+ return res;
+}
+
+static gboolean
+fs_funnel_src_event (GstPad * pad, GstEvent * event)
+{
+ GstElement *funnel;
+ GstIterator *iter;
+ GstPad *sinkpad;
+ gboolean result = FALSE;
+ gboolean done = FALSE;
+
+ funnel = gst_pad_get_parent_element (pad);
+ g_return_val_if_fail (funnel != NULL, FALSE);
+
+ iter = gst_element_iterate_sink_pads (funnel);
+
+ while (!done) {
+ switch (gst_iterator_next (iter, (gpointer) & sinkpad)) {
+ case GST_ITERATOR_OK:
+ gst_event_ref (event);
+ result |= gst_pad_push_event (sinkpad, event);
+ gst_object_unref (sinkpad);
+ break;
+ case GST_ITERATOR_RESYNC:
+ gst_iterator_resync (iter);
+ result = FALSE;
+ break;
+ case GST_ITERATOR_ERROR:
+ GST_WARNING_OBJECT (funnel, "Error iterating sinkpads");
+ case GST_ITERATOR_DONE:
+ done = TRUE;
+ break;
+ }
+ }
+ gst_iterator_free (iter);
+ gst_object_unref (funnel);
+ gst_event_unref (event);
+
+ return result;
+}
+
+static void
+reset_pad (gpointer data, gpointer user_data)
+{
+ GstPad *pad = data;
+ FsFunnelPadPrivate *priv = gst_pad_get_element_private (pad);
+
+ GST_OBJECT_LOCK (pad);
+ gst_segment_init (&priv->segment, GST_FORMAT_UNDEFINED);
+ GST_OBJECT_UNLOCK (pad);
+ gst_object_unref (pad);
+}
+
+static GstStateChangeReturn
+fs_funnel_change_state (GstElement * element, GstStateChange transition)
+{
+ FsFunnel *funnel = FS_FUNNEL (element);
+ GstStateChangeReturn ret;
+
+ switch (transition) {
+ case GST_STATE_CHANGE_READY_TO_PAUSED:
+ {
+ GstIterator *iter = gst_element_iterate_sink_pads (element);
+ GstIteratorResult res;
+
+ do {
+ res = gst_iterator_foreach (iter, reset_pad, NULL);
+ } while (res == GST_ITERATOR_RESYNC);
+
+ gst_iterator_free (iter);
+
+ if (res == GST_ITERATOR_ERROR)
+ return GST_STATE_CHANGE_FAILURE;
+
+ GST_OBJECT_LOCK (funnel);
+ funnel->has_segment = FALSE;
+ GST_OBJECT_UNLOCK (funnel);
+ }
+ break;
+ default:
+ break;
+ }
+
+ ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
+
+ return ret;
+}
projects / platform / upstream / gstreamer.git / commitdiff