gstreamer/plugins/elements/gstfunnel.c

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/*
* GStreamer Funnel element
*
* Copyright 2007 Collabora Ltd.
* @author: Olivier Crete <olivier.crete@collabora.co.uk>
* Copyright 2007 Nokia Corp.
*
* gstfunnel.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-funnel
*
* Takes packets from various input sinks into one output source.
*
* funnel always outputs a single, open ended segment from
* 0 with in %GST_FORMAT_TIME and outputs the buffers of the
* different sinkpads with timestamps that are set to the
* running time for that stream. funnel does not synchronize
* the different input streams but simply forwards all buffers
* immediately when they arrive.
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstfunnel.h"
GST_DEBUG_CATEGORY_STATIC (gst_funnel_debug);
#define GST_CAT_DEFAULT gst_funnel_debug
GType gst_funnel_pad_get_type (void);
#define GST_TYPE_FUNNEL_PAD \
(gst_funnel_pad_get_type())
#define GST_FUNNEL_PAD(obj) \
(G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_FUNNEL_PAD, GstFunnelPad))
#define GST_FUNNEL_PAD_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_FUNNEL_PAD, GstFunnelPadClass))
#define GST_IS_FUNNEL_PAD(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_FUNNEL_PAD))
#define GST_IS_FUNNEL_PAD_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_FUNNEL_PAD))
#define GST_FUNNEL_PAD_CAST(obj) \
((GstFunnelPad *)(obj))
typedef struct _GstFunnelPad GstFunnelPad;
typedef struct _GstFunnelPadClass GstFunnelPadClass;
struct _GstFunnelPad
{
GstPad parent;
GstSegment segment;
};
struct _GstFunnelPadClass
{
GstPadClass parent;
};
G_DEFINE_TYPE (GstFunnelPad, gst_funnel_pad, GST_TYPE_PAD);
static void
gst_funnel_pad_class_init (GstFunnelPadClass * klass)
{
}
static void
gst_funnel_pad_reset (GstFunnelPad * pad)
{
gst_segment_init (&pad->segment, GST_FORMAT_UNDEFINED);
}
static void
gst_funnel_pad_init (GstFunnelPad * pad)
{
gst_funnel_pad_reset (pad);
}
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);
#define _do_init \
GST_DEBUG_CATEGORY_INIT (gst_funnel_debug, "funnel", 0, "funnel element");
#define gst_funnel_parent_class parent_class
G_DEFINE_TYPE_WITH_CODE (GstFunnel, gst_funnel, GST_TYPE_ELEMENT, _do_init);
static GstStateChangeReturn gst_funnel_change_state (GstElement * element,
GstStateChange transition);
static GstPad *gst_funnel_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * name, const GstCaps * caps);
static void gst_funnel_release_pad (GstElement * element, GstPad * pad);
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static GstFlowReturn gst_funnel_sink_chain (GstPad * pad, GstBuffer * buffer);
static gboolean gst_funnel_sink_event (GstPad * pad, GstEvent * event);
static GstCaps *gst_funnel_sink_getcaps (GstPad * pad, GstCaps * filter);
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static gboolean gst_funnel_src_event (GstPad * pad, GstEvent * event);
static void
gst_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
gst_funnel_class_init (GstFunnelClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_funnel_dispose);
gst_element_class_set_details_simple (gstelement_class,
"Funnel pipe fitting", "Generic", "N-to-1 pipe fitting",
"Olivier Crete <olivier.crete@collabora.co.uk>");
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));
gstelement_class->request_new_pad =
GST_DEBUG_FUNCPTR (gst_funnel_request_new_pad);
gstelement_class->release_pad = GST_DEBUG_FUNCPTR (gst_funnel_release_pad);
gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_funnel_change_state);
}
static void
gst_funnel_init (GstFunnel * funnel)
{
funnel->srcpad = gst_pad_new_from_static_template (&funnel_src_template,
"src");
gst_pad_set_event_function (funnel->srcpad, gst_funnel_src_event);
gst_pad_use_fixed_caps (funnel->srcpad);
gst_element_add_pad (GST_ELEMENT (funnel), funnel->srcpad);
}
static GstPad *
gst_funnel_request_new_pad (GstElement * element, GstPadTemplate * templ,
const gchar * name, const GstCaps * caps)
{
GstPad *sinkpad;
GST_DEBUG_OBJECT (element, "requesting pad");
sinkpad = GST_PAD_CAST (g_object_new (GST_TYPE_FUNNEL_PAD,
"name", name, "direction", templ->direction, "template", templ,
NULL));
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gst_pad_set_chain_function (sinkpad,
GST_DEBUG_FUNCPTR (gst_funnel_sink_chain));
gst_pad_set_event_function (sinkpad,
GST_DEBUG_FUNCPTR (gst_funnel_sink_event));
gst_pad_set_getcaps_function (sinkpad,
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GST_DEBUG_FUNCPTR (gst_funnel_sink_getcaps));
gst_pad_set_active (sinkpad, TRUE);
gst_element_add_pad (element, sinkpad);
return sinkpad;
}
static void
gst_funnel_release_pad (GstElement * element, GstPad * pad)
{
GstFunnel *funnel = GST_FUNNEL (element);
GST_DEBUG_OBJECT (funnel, "releasing pad");
gst_pad_set_active (pad, FALSE);
gst_element_remove_pad (GST_ELEMENT_CAST (funnel), pad);
}
static GstCaps *
gst_funnel_sink_getcaps (GstPad * pad, GstCaps * filter)
{
GstFunnel *funnel = GST_FUNNEL (gst_pad_get_parent (pad));
GstCaps *caps;
if (G_UNLIKELY (funnel == NULL))
return gst_caps_new_any ();
caps = gst_pad_peer_get_caps (funnel->srcpad, filter);
if (caps == NULL)
caps = (filter ? gst_caps_ref (filter) : gst_caps_new_any ());
gst_object_unref (funnel);
return caps;
}
static GstFlowReturn
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gst_funnel_sink_chain (GstPad * pad, GstBuffer * buffer)
{
GstFlowReturn res;
GstFunnel *funnel = GST_FUNNEL (gst_pad_get_parent (pad));
GstFunnelPad *fpad = GST_FUNNEL_PAD_CAST (pad);
GstEvent *event = NULL;
GstClockTime newts;
#if 0
GstCaps *padcaps;
#endif
GST_DEBUG_OBJECT (funnel, "received buffer %p", buffer);
GST_OBJECT_LOCK (funnel);
if (fpad->segment.format == GST_FORMAT_UNDEFINED) {
GST_WARNING_OBJECT (funnel, "Got buffer without segment,"
" setting segment [0,inf[");
gst_segment_init (&fpad->segment, GST_FORMAT_TIME);
}
if (GST_CLOCK_TIME_IS_VALID (GST_BUFFER_TIMESTAMP (buffer)))
fpad->segment.position = GST_BUFFER_TIMESTAMP (buffer);
newts = gst_segment_to_running_time (&fpad->segment,
fpad->segment.format, GST_BUFFER_TIMESTAMP (buffer));
if (newts != GST_BUFFER_TIMESTAMP (buffer)) {
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buffer = gst_buffer_make_writable (buffer);
GST_BUFFER_TIMESTAMP (buffer) = newts;
}
if (!funnel->has_segment) {
GstSegment segment;
gst_segment_init (&segment, GST_FORMAT_TIME);
event = gst_event_new_segment (&segment);
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");
}
#if 0
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;
}
}
#endif
res = gst_pad_push (funnel->srcpad, buffer);
GST_LOG_OBJECT (funnel, "handled buffer %s", gst_flow_get_name (res));
#if 0
out:
#endif
gst_object_unref (funnel);
return res;
}
static gboolean
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gst_funnel_sink_event (GstPad * pad, GstEvent * event)
{
GstFunnel *funnel = GST_FUNNEL (gst_pad_get_parent (pad));
GstFunnelPad *fpad = GST_FUNNEL_PAD_CAST (pad);
gboolean forward = TRUE;
gboolean res = TRUE;
if (G_UNLIKELY (funnel == NULL)) {
gst_event_unref (event);
return FALSE;
}
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEGMENT:
{
GST_OBJECT_LOCK (funnel);
gst_event_copy_segment (event, &fpad->segment);
GST_OBJECT_UNLOCK (funnel);
forward = FALSE;
break;
}
case GST_EVENT_FLUSH_STOP:
{
GST_OBJECT_LOCK (funnel);
gst_segment_init (&fpad->segment, GST_FORMAT_UNDEFINED);
funnel->has_segment = FALSE;
GST_OBJECT_UNLOCK (funnel);
break;
}
default:
break;
}
if (forward)
res = gst_pad_push_event (funnel->srcpad, event);
else
gst_event_unref (event);
gst_object_unref (funnel);
return res;
}
static gboolean
gst_funnel_src_event (GstPad * pad, GstEvent * event)
{
GstElement *funnel;
GstIterator *iter;
GstPad *sinkpad;
gboolean result = FALSE;
gboolean done = FALSE;
GValue value = { 0, };
funnel = gst_pad_get_parent_element (pad);
if (G_UNLIKELY (funnel == NULL)) {
gst_event_unref (event);
return FALSE;
}
iter = gst_element_iterate_sink_pads (funnel);
while (!done) {
switch (gst_iterator_next (iter, &value)) {
case GST_ITERATOR_OK:
sinkpad = g_value_get_object (&value);
gst_event_ref (event);
result |= gst_pad_push_event (sinkpad, event);
g_value_reset (&value);
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;
}
}
g_value_unset (&value);
gst_iterator_free (iter);
gst_object_unref (funnel);
gst_event_unref (event);
return result;
}
static void
reset_pad (const GValue * data, gpointer user_data)
{
GstPad *pad = g_value_get_object (data);
GstFunnelPad *fpad = GST_FUNNEL_PAD_CAST (pad);
GST_OBJECT_LOCK (pad);
gst_funnel_pad_reset (fpad);
GST_OBJECT_UNLOCK (pad);
}
static GstStateChangeReturn
gst_funnel_change_state (GstElement * element, GstStateChange transition)
{
GstFunnel *funnel = GST_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;
}