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Diffstat (limited to 'gst/proxy/gstproxysrc.c')
| -rw-r--r-- | gst/proxy/gstproxysrc.c | 325 |
1 files changed, 0 insertions, 325 deletions
diff --git a/gst/proxy/gstproxysrc.c b/gst/proxy/gstproxysrc.c deleted file mode 100644 index e760d0f2a..000000000 --- a/gst/proxy/gstproxysrc.c +++ /dev/null @@ -1,325 +0,0 @@ -/* - * Copyright (C) 2015 Centricular Ltd. - * Author: Sebastian Dröge <sebastian@centricular.com> - * Author: Nirbheek Chauhan <nirbheek@centricular.com> - * - * Redistribution and use in source and binary forms, with or without modification, - * are permitted provided that the following conditions are met: - * - * 1. Redistributions of source code must retain the above copyright notice, this - * list of conditions and the following disclaimer. - * - * 2. Redistributions in binary form must reproduce the above copyright notice, this - * list of conditions and the following disclaimer in the documentation and/or other - * materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED - * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. - * IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, - * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR - * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, - * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY - * OF SUCH DAMAGE. - */ - -/** - * SECTION:element-proxysrc - * - * Proxysrc is a source element that proxies events, queries, and buffers from - * another pipeline that contains a matching proxysink element. The purpose is - * to allow two decoupled pipelines to function as though they are one without - * having to manually shuttle buffers, events, queries, etc between the two. - * - * The element queues buffers from the matching proxysink to an internal queue, - * so everything downstream is properly decoupled from the upstream pipeline. - * - */ - -#ifdef HAVE_CONFIG_H -#include "config.h" -#endif -#include "gstproxysrc.h" -#include "gstproxysrc-priv.h" -#include "gstproxysink.h" -#include "gstproxysink-priv.h" - -#define GST_CAT_DEFAULT gst_proxy_src_debug -GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT); - -static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src", - GST_PAD_SRC, - GST_PAD_ALWAYS, - GST_STATIC_CAPS_ANY); - -enum -{ - PROP_0, - PROP_PROXYSINK, -}; - -struct _GstProxySrcPrivate -{ - /* Queue to hold buffers from proxysink */ - GstElement *queue; - /* Source pad of the above queue and the proxysrc element itself */ - GstPad *srcpad; - /* Our internal srcpad that proxysink pushes buffers/events/queries into */ - GstPad *internal_srcpad; - /* An unlinked dummy sinkpad; see gst_proxy_src_init() */ - GstPad *dummy_sinkpad; - /* The matching proxysink; queries and events are sent to its sinkpad */ - GWeakRef proxysink; -}; - -/* We're not subclassing from basesrc because we don't want any of the special - * handling it has for events/queries/etc. We just pass-through everything. */ - -/* Our parent type is a GstBin instead of GstElement because we contain a queue - * element */ -#define parent_class gst_proxy_src_parent_class -G_DEFINE_TYPE (GstProxySrc, gst_proxy_src, GST_TYPE_BIN); - -static gboolean gst_proxy_src_internal_src_query (GstPad * pad, - GstObject * parent, GstQuery * query); -static gboolean gst_proxy_src_internal_src_event (GstPad * pad, - GstObject * parent, GstEvent * event); - -static GstStateChangeReturn gst_proxy_src_change_state (GstElement * element, - GstStateChange transition); -static void gst_proxy_src_dispose (GObject * object); - -static void -gst_proxy_src_get_property (GObject * object, - guint prop_id, GValue * value, GParamSpec * spec) -{ - GstProxySrc *self = GST_PROXY_SRC (object); - - switch (prop_id) { - case PROP_PROXYSINK: - g_value_take_object (value, g_weak_ref_get (&self->priv->proxysink)); - break; - default: - G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, spec); - break; - } -} - -static void -gst_proxy_src_set_property (GObject * object, - guint prop_id, const GValue * value, GParamSpec * spec) -{ - GstProxySrc *self = GST_PROXY_SRC (object); - GstProxySink *sink; - - switch (prop_id) { - case PROP_PROXYSINK: - sink = g_value_dup_object (value); - if (sink == NULL) { - /* Unset proxysrc property on the existing proxysink to break the - * connection in that direction */ - GstProxySink *old_sink = g_weak_ref_get (&self->priv->proxysink); - if (old_sink) { - gst_proxy_sink_set_proxysrc (old_sink, NULL); - g_object_unref (old_sink); - } - g_weak_ref_set (&self->priv->proxysink, NULL); - } else { - /* Set proxysrc property on the new proxysink to point to us */ - gst_proxy_sink_set_proxysrc (sink, self); - g_weak_ref_set (&self->priv->proxysink, sink); - g_object_unref (sink); - } - break; - default: - G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, spec); - } -} - -static void -gst_proxy_src_class_init (GstProxySrcClass * klass) -{ - GObjectClass *gobject_class = (GObjectClass *) klass; - GstElementClass *gstelement_class = (GstElementClass *) klass; - - GST_DEBUG_CATEGORY_INIT (gst_proxy_src_debug, "proxysrc", 0, "proxy sink"); - - g_type_class_add_private (klass, sizeof (GstProxySrcPrivate)); - - gobject_class->dispose = gst_proxy_src_dispose; - - gobject_class->get_property = gst_proxy_src_get_property; - gobject_class->set_property = gst_proxy_src_set_property; - - g_object_class_install_property (gobject_class, PROP_PROXYSINK, - g_param_spec_object ("proxysink", "Proxysink", "Matching proxysink", - GST_TYPE_PROXY_SINK, G_PARAM_READWRITE)); - - gstelement_class->change_state = gst_proxy_src_change_state; - gst_element_class_add_pad_template (gstelement_class, - gst_static_pad_template_get (&src_template)); - - gst_element_class_set_static_metadata (gstelement_class, "Proxy source", - "Source", "Proxy source for internal process communication", - "Sebastian Dröge <sebastian@centricular.com>"); -} - -static void -gst_proxy_src_init (GstProxySrc * self) -{ - GstPad *srcpad, *sinkpad; - GstPadTemplate *templ; - - GST_OBJECT_FLAG_SET (self, GST_ELEMENT_FLAG_SOURCE); - - self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self, GST_TYPE_PROXY_SRC, - GstProxySrcPrivate); - - /* We feed incoming buffers into a queue to decouple the downstream pipeline - * from the upstream pipeline */ - self->priv->queue = gst_element_factory_make ("queue", NULL); - gst_bin_add (GST_BIN (self), self->priv->queue); - - srcpad = gst_element_get_static_pad (self->priv->queue, "src"); - templ = gst_static_pad_template_get (&src_template); - self->priv->srcpad = gst_ghost_pad_new_from_template ("src", srcpad, templ); - gst_object_unref (templ); - gst_object_unref (srcpad); - - gst_element_add_pad (GST_ELEMENT (self), self->priv->srcpad); - - /* A dummy sinkpad that's not actually used anywhere - * Explanation for why this is needed is below */ - self->priv->dummy_sinkpad = gst_pad_new ("dummy_sinkpad", GST_PAD_SINK); - gst_object_set_parent (GST_OBJECT (self->priv->dummy_sinkpad), - GST_OBJECT (self)); - - self->priv->internal_srcpad = gst_pad_new ("internal_src", GST_PAD_SRC); - gst_object_set_parent (GST_OBJECT (self->priv->internal_srcpad), - GST_OBJECT (self->priv->dummy_sinkpad)); - gst_pad_set_event_function (self->priv->internal_srcpad, - gst_proxy_src_internal_src_event); - gst_pad_set_query_function (self->priv->internal_srcpad, - gst_proxy_src_internal_src_query); - - /* We need to link internal_srcpad from proxysink to the sinkpad of our - * queue. However, two pads can only be linked if they share a common parent. - * Above, we set the parent of the dummy_sinkpad as proxysrc, and then we set - * the parent of internal_srcpad as dummy_sinkpad. This causes both these pads - * to share a parent allowing us to link them. - * Yes, this is a hack/workaround. */ - sinkpad = gst_element_get_static_pad (self->priv->queue, "sink"); - gst_pad_link (self->priv->internal_srcpad, sinkpad); - gst_object_unref (sinkpad); -} - -static void -gst_proxy_src_dispose (GObject * object) -{ - GstProxySrc *self = GST_PROXY_SRC (object); - - gst_object_unparent (GST_OBJECT (self->priv->dummy_sinkpad)); - self->priv->dummy_sinkpad = NULL; - - gst_object_unparent (GST_OBJECT (self->priv->internal_srcpad)); - self->priv->internal_srcpad = NULL; - - g_weak_ref_set (&self->priv->proxysink, NULL); - - G_OBJECT_CLASS (gst_proxy_src_parent_class)->dispose (object); -} - -static GstStateChangeReturn -gst_proxy_src_change_state (GstElement * element, GstStateChange transition) -{ - GstElementClass *gstelement_class = - GST_ELEMENT_CLASS (gst_proxy_src_parent_class); - GstProxySrc *self = GST_PROXY_SRC (element); - GstStateChangeReturn ret; - - ret = gstelement_class->change_state (element, transition); - if (ret == GST_STATE_CHANGE_FAILURE) - return ret; - - switch (transition) { - case GST_STATE_CHANGE_READY_TO_PAUSED: - ret = GST_STATE_CHANGE_NO_PREROLL; - gst_pad_set_active (self->priv->internal_srcpad, TRUE); - break; - case GST_STATE_CHANGE_PAUSED_TO_READY: - gst_pad_set_active (self->priv->internal_srcpad, FALSE); - break; - default: - break; - } - - return ret; -} - -static gboolean -gst_proxy_src_internal_src_query (GstPad * pad, GstObject * parent, - GstQuery * query) -{ - GstProxySrc *self = GST_PROXY_SRC (gst_object_get_parent (parent)); - GstProxySink *sink; - gboolean ret = FALSE; - - if (!self) - return ret; - - GST_LOG_OBJECT (pad, "Handling query of type '%s'", - gst_query_type_get_name (GST_QUERY_TYPE (query))); - - sink = g_weak_ref_get (&self->priv->proxysink); - if (sink) { - GstPad *sinkpad; - sinkpad = gst_proxy_sink_get_internal_sinkpad (sink); - - ret = gst_pad_peer_query (sinkpad, query); - gst_object_unref (sinkpad); - gst_object_unref (sink); - } - - gst_object_unref (self); - - return ret; -} - -static gboolean -gst_proxy_src_internal_src_event (GstPad * pad, GstObject * parent, - GstEvent * event) -{ - GstProxySrc *self = GST_PROXY_SRC (gst_object_get_parent (parent)); - GstProxySink *sink; - gboolean ret = FALSE; - - if (!self) - return ret; - - GST_LOG_OBJECT (pad, "Got %s event", GST_EVENT_TYPE_NAME (event)); - - sink = g_weak_ref_get (&self->priv->proxysink); - if (sink) { - GstPad *sinkpad; - sinkpad = gst_proxy_sink_get_internal_sinkpad (sink); - - ret = gst_pad_push_event (sinkpad, event); - gst_object_unref (sinkpad); - gst_object_unref (sink); - } else - gst_event_unref (event); - - - gst_object_unref (self); - - return ret; -} - -/* Wrapper function for accessing private member */ -GstPad * -gst_proxy_src_get_internal_srcpad (GstProxySrc * self) -{ - return gst_object_ref (self->priv->internal_srcpad); -} |