gstreamer/gst/elements/gsttee.c

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/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wim.taymans@chello.be>
*
* gsttee.c: Tee element, one in N out
*
* 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.
*/
#include "gsttee.h"
GstElementDetails gst_tee_details = {
"Tee pipe fitting",
"Generic",
"LGPL",
"1-to-N pipe fitting",
VERSION,
"Erik Walthinsen <omega@cse.ogi.edu>\n"
"Wim Taymans <wim.taymans@chello.be>",
"(C) 1999, 2000",
};
/* Tee signals and args */
enum {
/* FILL ME */
LAST_SIGNAL
};
enum {
ARG_0,
ARG_SILENT,
ARG_NUM_PADS,
ARG_LAST_MESSAGE,
/* FILL ME */
};
GST_PAD_TEMPLATE_FACTORY (tee_src_factory,
"src%d",
GST_PAD_SRC,
GST_PAD_REQUEST,
NULL /* no caps */
);
static void gst_tee_class_init (GstTeeClass *klass);
static void gst_tee_init (GstTee *tee);
static GstPad* gst_tee_request_new_pad (GstElement *element, GstPadTemplate *temp, const gchar *unused);
static void gst_tee_set_property (GObject *object, guint prop_id,
const GValue *value, GParamSpec *pspec);
static void gst_tee_get_property (GObject *object, guint prop_id,
GValue *value, GParamSpec *pspec);
static void gst_tee_chain (GstPad *pad, GstBuffer *buf);
static GstElementClass *parent_class = NULL;
/*static guint gst_tee_signals[LAST_SIGNAL] = { 0 };*/
GType
gst_tee_get_type(void) {
static GType tee_type = 0;
if (!tee_type) {
static const GTypeInfo tee_info = {
sizeof(GstTeeClass), NULL,
NULL,
(GClassInitFunc)gst_tee_class_init,
NULL,
NULL,
sizeof(GstTee),
0,
(GInstanceInitFunc)gst_tee_init,
};
tee_type = g_type_register_static (GST_TYPE_ELEMENT, "GstTee", &tee_info, 0);
}
return tee_type;
}
static void
gst_tee_class_init (GstTeeClass *klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass*)klass;
gstelement_class = (GstElementClass*)klass;
parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_NUM_PADS,
g_param_spec_int ("num_pads", "num_pads", "num_pads",
0, G_MAXINT, 0, G_PARAM_READABLE));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SILENT,
g_param_spec_boolean ("silent", "silent", "silent",
FALSE, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_LAST_MESSAGE,
g_param_spec_string ("last_message", "last_message", "last_message",
NULL, G_PARAM_READABLE));
gobject_class->set_property = GST_DEBUG_FUNCPTR(gst_tee_set_property);
gobject_class->get_property = GST_DEBUG_FUNCPTR(gst_tee_get_property);
gstelement_class->request_new_pad = GST_DEBUG_FUNCPTR(gst_tee_request_new_pad);
}
static GstPadLinkReturn
gst_tee_sinklink (GstPad *pad, GstCaps *caps)
{
GstTee *tee;
const GList *pads;
GstPadLinkReturn set_retval;
tee = GST_TEE (gst_pad_get_parent (pad));
if (!GST_CAPS_IS_FIXED (caps)) {
return GST_PAD_LINK_DELAYED;
}
/* go through all the src pads */
pads = gst_element_get_pad_list (GST_ELEMENT (tee));
while (pads) {
GstPad *outpad = GST_PAD (pads->data);
pads = g_list_next (pads);
if (GST_PAD_DIRECTION (outpad) != GST_PAD_SRC || !GST_PAD_IS_USABLE (outpad))
continue;
if ((set_retval = gst_pad_try_set_caps (outpad, caps)) <= 0) {
return set_retval;
}
}
return GST_PAD_LINK_OK;
}
static void
gst_tee_init (GstTee *tee)
{
tee->sinkpad = gst_pad_new ("sink", GST_PAD_SINK);
gst_element_add_pad (GST_ELEMENT (tee), tee->sinkpad);
gst_pad_set_chain_function (tee->sinkpad, GST_DEBUG_FUNCPTR (gst_tee_chain));
gst_pad_set_link_function (tee->sinkpad, GST_DEBUG_FUNCPTR (gst_tee_sinklink));
tee->silent = FALSE;
tee->last_message = NULL;
}
/* helper compare function */
gint name_pad_compare (gconstpointer a, gconstpointer b)
{
GstPad* pad = (GstPad*) a;
gchar *name = (gchar *) b;
g_assert (GST_IS_PAD (pad));
return g_strcasecmp (name, gst_pad_get_name (pad)); /* returns 0 if match */
}
static GstPad*
gst_tee_request_new_pad (GstElement *element, GstPadTemplate *templ, const gchar *unused)
{
gchar *name;
GstPad *srcpad;
GstTee *tee;
gint i = 0;
const GList *pads;
g_return_val_if_fail (GST_IS_TEE (element), NULL);
if (templ->direction != GST_PAD_SRC) {
g_warning ("gsttee: request new pad that is not a SRC pad\n");
return NULL;
}
tee = GST_TEE (element);
/* try names in order and find one that's not in use atm */
pads = gst_element_get_pad_list (element);
name = NULL;
while (!name)
{
name = g_strdup_printf ("src%d", i);
if (g_list_find_custom ((GList *)pads, (gconstpointer) name, name_pad_compare) != NULL)
{
/* this name is taken, use the next one */
++i;
g_free (name);
name = NULL;
}
}
if (!tee->silent) {
g_free (tee->last_message);
tee->last_message = g_strdup_printf ("new pad %s", name);
g_object_notify (G_OBJECT (tee), "last_message");
}
srcpad = gst_pad_new_from_template (templ, name);
g_free (name);
gst_element_add_pad (GST_ELEMENT (tee), srcpad);
GST_PAD_ELEMENT_PRIVATE (srcpad) = NULL;
if (GST_PAD_CAPS (tee->sinkpad)) {
gst_pad_try_set_caps (srcpad, GST_PAD_CAPS (tee->sinkpad));
}
return srcpad;
}
static void
gst_tee_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
{
GstTee *tee;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_TEE (object));
tee = GST_TEE (object);
switch (prop_id) {
case ARG_SILENT:
tee->silent = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_tee_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
{
GstTee *tee;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_TEE (object));
tee = GST_TEE (object);
switch (prop_id) {
case ARG_NUM_PADS:
g_value_set_int (value, GST_ELEMENT (tee)->numsrcpads);
break;
case ARG_SILENT:
g_value_set_boolean (value, tee->silent);
break;
case ARG_LAST_MESSAGE:
g_value_set_string ((GValue *) value, tee->last_message);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/**
* gst_tee_chain:
* @pad: the pad to follow
* @buf: the buffer to pass
*
* Chain a buffer on a pad.
*/
static void
gst_tee_chain (GstPad *pad, GstBuffer *buf)
{
GstTee *tee;
const GList *pads;
g_return_if_fail (pad != NULL);
g_return_if_fail (GST_IS_PAD (pad));
g_return_if_fail (buf != NULL);
tee = GST_TEE (gst_pad_get_parent (pad));
gst_buffer_ref_by_count (buf, GST_ELEMENT (tee)->numsrcpads - 1);
pads = gst_element_get_pad_list (GST_ELEMENT (tee));
while (pads) {
GstPad *outpad = GST_PAD (pads->data);
pads = g_list_next (pads);
if (GST_PAD_DIRECTION (outpad) != GST_PAD_SRC)
continue;
if (!tee->silent) {
g_free (tee->last_message);
tee->last_message = g_strdup_printf ("chain ******* (%s:%s)t (%d bytes, %llu) %p",
GST_DEBUG_PAD_NAME (outpad), GST_BUFFER_SIZE (buf), GST_BUFFER_TIMESTAMP (buf), buf);
g_object_notify (G_OBJECT (tee), "last_message");
}
if (GST_PAD_IS_USABLE (outpad))
gst_pad_push (outpad, buf);
else
gst_buffer_unref (buf);
}
}
gboolean
gst_tee_factory_init (GstElementFactory *factory)
{
gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (tee_src_factory));
return TRUE;
}