mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2024-11-27 12:11:13 +00:00
Code Issues 1 Projects Releases Wiki Activity
gstreamer/gst/gstpad.c
Wim Taymans 1340064d57 More doc updates 
Original commit message from CVS:
More doc updates
Manual additions: xml/load save of custom XML, debugging, request pads
added a signal to the example plugin
fixed a bug in mp3parse (ifdef 1)
2001-02-22 23:18:51 +00:00

1355 lines
33 KiB
C
Raw Blame History

/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
*
* gstpad.c: Pads for connecting elements together
*
* 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.
*/
//#define GST_DEBUG_ENABLED
#include "gst_private.h"
#include "gstpad.h"
#include "gstelement.h"
#include "gsttype.h"
#include "gstbin.h"
/***** Start with the base GstPad class *****/
static void gst_pad_class_init (GstPadClass *klass);
static void gst_pad_init (GstPad *pad);
static xmlNodePtr gst_pad_save_thyself (GstObject *object, xmlNodePtr parent);
static GstObject *pad_parent_class = NULL;
GtkType
gst_pad_get_type(void) {
static GtkType pad_type = 0;
if (!pad_type) {
static const GtkTypeInfo pad_info = {
"GstPad",
sizeof(GstPad),
sizeof(GstPadClass),
(GtkClassInitFunc)gst_pad_class_init,
(GtkObjectInitFunc)gst_pad_init,
(GtkArgSetFunc)NULL,
(GtkArgGetFunc)NULL,
(GtkClassInitFunc)NULL,
};
pad_type = gtk_type_unique(GST_TYPE_OBJECT,&pad_info);
}
return pad_type;
}
static void
gst_pad_class_init (GstPadClass *klass)
{
pad_parent_class = gtk_type_class(GST_TYPE_OBJECT);
}
static void
gst_pad_init (GstPad *pad)
{
pad->element_private = NULL;
pad->padtemplate = NULL;
}
/***** Then do the Real Pad *****/
/* Pad signals and args */
enum {
REAL_SET_ACTIVE,
REAL_CAPS_CHANGED,
/* FILL ME */
REAL_LAST_SIGNAL
};
enum {
REAL_ARG_0,
REAL_ARG_ACTIVE,
/* FILL ME */
};
static void gst_real_pad_class_init (GstRealPadClass *klass);
static void gst_real_pad_init (GstRealPad *pad);
static void gst_real_pad_set_arg (GtkObject *object,GtkArg *arg,guint id);
static void gst_real_pad_get_arg (GtkObject *object,GtkArg *arg,guint id);
static void gst_real_pad_destroy (GtkObject *object);
static void gst_pad_push_func (GstPad *pad, GstBuffer *buf);
static gboolean gst_pad_eos_func (GstPad *pad);
static GstPad *real_pad_parent_class = NULL;
static guint gst_real_pad_signals[REAL_LAST_SIGNAL] = { 0 };
GtkType
gst_real_pad_get_type(void) {
static GtkType pad_type = 0;
if (!pad_type) {
static const GtkTypeInfo pad_info = {
"GstRealPad",
sizeof(GstRealPad),
sizeof(GstRealPadClass),
(GtkClassInitFunc)gst_real_pad_class_init,
(GtkObjectInitFunc)gst_real_pad_init,
(GtkArgSetFunc)NULL,
(GtkArgGetFunc)NULL,
(GtkClassInitFunc)NULL,
};
pad_type = gtk_type_unique(GST_TYPE_PAD,&pad_info);
}
return pad_type;
}
static void
gst_real_pad_class_init (GstRealPadClass *klass)
{
GtkObjectClass *gtkobject_class;
GstObjectClass *gstobject_class;
gtkobject_class = (GtkObjectClass*)klass;
gstobject_class = (GstObjectClass*)klass;
real_pad_parent_class = gtk_type_class(GST_TYPE_PAD);
gst_real_pad_signals[REAL_SET_ACTIVE] =
gtk_signal_new ("set_active", GTK_RUN_LAST, gtkobject_class->type,
GTK_SIGNAL_OFFSET (GstRealPadClass, set_active),
gtk_marshal_NONE__BOOL, GTK_TYPE_NONE, 1,
GTK_TYPE_BOOL);
gst_real_pad_signals[REAL_CAPS_CHANGED] =
gtk_signal_new ("caps_changed", GTK_RUN_LAST, gtkobject_class->type,
GTK_SIGNAL_OFFSET (GstRealPadClass, caps_changed),
gtk_marshal_NONE__POINTER, GTK_TYPE_NONE, 1,
GTK_TYPE_POINTER);
gtk_object_class_add_signals (gtkobject_class, gst_real_pad_signals, REAL_LAST_SIGNAL);
gtk_object_add_arg_type ("GstRealPad::active", GTK_TYPE_BOOL,
GTK_ARG_READWRITE, REAL_ARG_ACTIVE);
gtkobject_class->destroy = gst_real_pad_destroy;
gtkobject_class->set_arg = gst_real_pad_set_arg;
gtkobject_class->get_arg = gst_real_pad_get_arg;
gstobject_class->save_thyself = gst_pad_save_thyself;
gstobject_class->path_string_separator = ".";
}
static void
gst_real_pad_init (GstRealPad *pad)
{
pad->direction = GST_PAD_UNKNOWN;
pad->peer = NULL;
pad->chainfunc = NULL;
pad->getfunc = NULL;
pad->getregionfunc = NULL;
pad->qosfunc = NULL;
pad->eosfunc = gst_pad_eos_func;
pad->pushfunc = GST_DEBUG_FUNCPTR(gst_pad_push_func);
pad->pullfunc = NULL;
pad->pullregionfunc = NULL;
pad->ghostpads = NULL;
pad->caps = NULL;
}
static void
gst_real_pad_set_arg (GtkObject *object, GtkArg *arg, guint id)
{
g_return_if_fail(GST_IS_PAD(object));
switch (id) {
case REAL_ARG_ACTIVE:
if (GTK_VALUE_BOOL(*arg)) {
gst_info("gstpad: activating pad\n");
GST_FLAG_UNSET(object,GST_PAD_DISABLED);
} else {
gst_info("gstpad: de-activating pad\n");
GST_FLAG_SET(object,GST_PAD_DISABLED);
}
gtk_signal_emit(GTK_OBJECT(object), gst_real_pad_signals[REAL_SET_ACTIVE],
! GST_FLAG_IS_SET(object,GST_PAD_DISABLED));
break;
default:
break;
}
}
static void
gst_real_pad_get_arg (GtkObject *object, GtkArg *arg, guint id)
{
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_PAD (object));
switch (id) {
case REAL_ARG_ACTIVE:
GTK_VALUE_BOOL (*arg) = ! GST_FLAG_IS_SET (object, GST_PAD_DISABLED);
break;
default:
break;
}
}
/**
* gst_pad_new:
* @name: name of new pad
* @direction: either GST_PAD_SRC or GST_PAD_SINK
*
* Create a new pad with given name.
*
* Returns: new pad
*/
GstPad*
gst_pad_new (gchar *name,
GstPadDirection direction)
{
GstRealPad *pad;
g_return_val_if_fail (name != NULL, NULL);
g_return_val_if_fail (direction != GST_PAD_UNKNOWN, NULL);
pad = gtk_type_new (gst_real_pad_get_type ());
gst_object_set_name (GST_OBJECT (pad), name);
GST_RPAD_DIRECTION(pad) = direction;
return GST_PAD(pad);
}
/**
* gst_pad_new_from_template:
* @templ: the pad template to use
* @name: the name of the element
*
* Create a new pad with given name from the given template.
*
* Returns: new pad
*/
GstPad*
gst_pad_new_from_template (GstPadTemplate *templ,
gchar *name)
{
GstPad *pad;
g_return_val_if_fail (name != NULL, NULL);
g_return_val_if_fail (templ != NULL, NULL);
pad = gst_pad_new (name, templ->direction);
GST_PAD_CAPS(pad) = templ->caps;
GST_PAD_PADTEMPLATE(pad) = templ;
return pad;
}
/**
* gst_pad_get_direction:
* @pad: the Pad to get the direction from
*
* Get the direction of the pad.
*
* Returns: the direction of the pad
*/
GstPadDirection
gst_pad_get_direction (GstPad *pad)
{
g_return_val_if_fail (pad != NULL, GST_PAD_UNKNOWN);
g_return_val_if_fail (GST_IS_PAD (pad), GST_PAD_UNKNOWN);
return GST_PAD_DIRECTION(pad);
}
/**
* gst_pad_set_name:
* @pad: the pad to set the name of
* @name: the name of the pad
*
* Set the name of a pad.
*/
void
gst_pad_set_name (GstPad *pad,
const gchar *name)
{
g_return_if_fail (pad != NULL);
g_return_if_fail (GST_IS_PAD (pad));
gst_object_set_name (GST_OBJECT (pad), name);
}
/**
* gst_pad_get_name:
* @pad: the pad to get the name of
*
* Get the name of a pad.
*
* Returns: the name of the pad, don't free.
*/
const gchar*
gst_pad_get_name (GstPad *pad)
{
g_return_val_if_fail (pad != NULL, NULL);
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
return GST_OBJECT_NAME (pad);
}
/**
* gst_pad_set_chain_function:
* @pad: the pad to set the chain function for
* @chain: the chain function
*
* Set the given chain function for the pad.
*/
void gst_pad_set_chain_function (GstPad *pad,
GstPadChainFunction chain)
{
g_return_if_fail (pad != NULL);
g_return_if_fail (GST_IS_REAL_PAD (pad));
GST_RPAD_CHAINFUNC(pad) = chain;
GST_DEBUG (0,"chainfunc for %s:%s(@%p) at %p is set to %p\n",
GST_DEBUG_PAD_NAME(pad),pad,&GST_RPAD_CHAINFUNC(pad),chain);
}
/**
* gst_pad_set_get_function:
* @pad: the pad to set the get function for
* @get: the get function
*
* Set the given get function for the pad.
*/
void
gst_pad_set_get_function (GstPad *pad,
GstPadGetFunction get)
{
g_return_if_fail (pad != NULL);
g_return_if_fail (GST_IS_REAL_PAD (pad));
GST_RPAD_GETFUNC(pad) = get;
GST_DEBUG (0,"getfunc for %s:%s(@%p) at %p is set to %p\n",
GST_DEBUG_PAD_NAME(pad),pad,&GST_RPAD_GETFUNC(pad),get);
}
/**
* gst_pad_set_getregion_function:
* @pad: the pad to set the getregion function for
* @getregion: the getregion function
*
* Set the given getregion function for the pad.
*/
void
gst_pad_set_getregion_function (GstPad *pad,
GstPadGetRegionFunction getregion)
{
g_return_if_fail (pad != NULL);
g_return_if_fail (GST_IS_REAL_PAD (pad));
GST_RPAD_GETREGIONFUNC(pad) = getregion;
GST_DEBUG (0,"getregionfunc for %s:%s(@%p) at %p is set to %p\n",
GST_DEBUG_PAD_NAME(pad),pad,&GST_RPAD_GETREGIONFUNC(pad),getregion);
}
/**
* gst_pad_set_qos_function:
* @pad: the pad to set the qos function for
* @qos: the qos function
*
* Set the given qos function for the pad.
*/
void
gst_pad_set_qos_function (GstPad *pad,
GstPadQoSFunction qos)
{
g_return_if_fail (pad != NULL);
g_return_if_fail (GST_IS_REAL_PAD (pad));
GST_RPAD_QOSFUNC(pad) = qos;
GST_DEBUG (0,"qosfunc for %s:%s(@%p) at %p is set to %p\n",
GST_DEBUG_PAD_NAME(pad),pad,&GST_RPAD_QOSFUNC(pad),qos);
}
/**
* gst_pad_set_eos_function:
* @pad: the pad to set the eos function for
* @eos: the eos function
*
* Set the given EOS function for the pad.
*/
void
gst_pad_set_eos_function (GstPad *pad,
GstPadEOSFunction eos)
{
g_return_if_fail (pad != NULL);
g_return_if_fail (GST_IS_REAL_PAD (pad));
GST_RPAD_EOSFUNC(pad) = eos;
GST_DEBUG (0,"eosfunc for %s:%s(@%p) at %p is set to %p\n",
GST_DEBUG_PAD_NAME(pad),pad,&GST_RPAD_EOSFUNC(pad),eos);
}
static void
gst_pad_push_func(GstPad *pad, GstBuffer *buf)
{
if (GST_RPAD_CHAINFUNC(GST_RPAD_PEER(pad)) != NULL) {
GST_DEBUG (0,"calling chain function\n");
(GST_RPAD_CHAINFUNC(GST_RPAD_PEER(pad)))(pad,buf);
} else {
GST_DEBUG (0,"got a problem here: default pad_push handler in place, no chain function\n");
}
}
/**
* gst_pad_handle_qos:
* @pad: the pad to handle the QoS message
* @qos_message: the QoS message to handle
*
* Pass the qos message downstream.
*/
void
gst_pad_handle_qos(GstPad *pad,
glong qos_message)
{
GstElement *element;
GList *pads;
GstPad *target_pad;
GST_DEBUG (0,"gst_pad_handle_qos(\"%s\",%08ld)\n", GST_OBJECT_NAME (GST_PAD_PARENT (pad)),qos_message);
if (GST_RPAD_QOSFUNC(pad)) {
(GST_RPAD_QOSFUNC(pad)) (pad,qos_message);
} else {
element = GST_ELEMENT (GST_PAD_PARENT(GST_RPAD_PEER(pad)));
pads = element->pads;
GST_DEBUG (0,"gst_pad_handle_qos recurse(\"%s\",%08ld)\n", GST_ELEMENT_NAME (element), qos_message);
while (pads) {
target_pad = GST_PAD (pads->data);
if (GST_RPAD_DIRECTION(target_pad) == GST_PAD_SINK) {
gst_pad_handle_qos (target_pad, qos_message);
}
pads = g_list_next (pads);
}
}
return;
}
/**
* gst_pad_disconnect:
* @srcpad: the source pad to disconnect
* @sinkpad: the sink pad to disconnect
*
* Disconnects the source pad from the sink pad.
*/
void
gst_pad_disconnect (GstPad *srcpad,
GstPad *sinkpad)
{
GstRealPad *realsrc, *realsink;
/* generic checks */
g_return_if_fail (srcpad != NULL);
g_return_if_fail (GST_IS_PAD (srcpad));
g_return_if_fail (sinkpad != NULL);
g_return_if_fail (GST_IS_PAD (sinkpad));
// now we need to deal with the real/ghost stuff
realsrc = GST_PAD_REALIZE(srcpad);
realsink = GST_PAD_REALIZE(sinkpad);
g_return_if_fail (GST_RPAD_PEER(realsrc) != NULL);
g_return_if_fail (GST_RPAD_PEER(realsink) != NULL);
g_return_if_fail ((GST_RPAD_DIRECTION(realsrc) == GST_PAD_SRC) &&
(GST_RPAD_DIRECTION(realsink) == GST_PAD_SINK));
/* first clear peers */
GST_RPAD_PEER(realsrc) = NULL;
GST_RPAD_PEER(realsink) = NULL;
GST_INFO (GST_CAT_ELEMENT_PADS, "disconnected %s:%s and %s:%s",
GST_DEBUG_PAD_NAME(srcpad), GST_DEBUG_PAD_NAME(sinkpad));
}
/**
* gst_pad_connect:
* @srcpad: the source pad to connect
* @sinkpad: the sink pad to connect
*
* Connects the source pad to the sink pad.
*/
void
gst_pad_connect (GstPad *srcpad,
GstPad *sinkpad)
{
GstRealPad *realsrc, *realsink;
GstRealPad *temppad;
/* generic checks */
g_return_if_fail(srcpad != NULL);
g_return_if_fail(GST_IS_PAD(srcpad));
g_return_if_fail(sinkpad != NULL);
g_return_if_fail(GST_IS_PAD(sinkpad));
// now we need to deal with the real/ghost stuff
realsrc = GST_PAD_REALIZE(srcpad);
realsink = GST_PAD_REALIZE(sinkpad);
g_return_if_fail(GST_RPAD_PEER(realsrc) == NULL);
g_return_if_fail(GST_RPAD_PEER(realsink) == NULL);
/* check for reversed directions and swap if necessary */
if ((GST_RPAD_DIRECTION(realsrc) == GST_PAD_SINK) &&
(GST_RPAD_DIRECTION(realsink) == GST_PAD_SRC)) {
temppad = realsrc;
realsrc = realsink;
realsink = temppad;
}
g_return_if_fail((GST_RPAD_DIRECTION(realsrc) == GST_PAD_SRC) &&
(GST_RPAD_DIRECTION(realsink) == GST_PAD_SINK));
if (!gst_pad_check_compatibility (srcpad, sinkpad)) {
g_warning ("gstpad: connecting incompatible pads (%s:%s) and (%s:%s)\n",
GST_DEBUG_PAD_NAME (srcpad), GST_DEBUG_PAD_NAME (sinkpad));
}
else {
GST_DEBUG (0,"gstpad: connecting compatible pads (%s:%s) and (%s:%s)\n",
GST_DEBUG_PAD_NAME (srcpad), GST_DEBUG_PAD_NAME (sinkpad));
}
/* first set peers */
GST_RPAD_PEER(realsrc) = realsink;
GST_RPAD_PEER(realsink) = realsrc;
/* set the connected flag */
/* FIXME: set connected flag */
GST_INFO (GST_CAT_ELEMENT_PADS, "connected %s:%s and %s:%s",
GST_DEBUG_PAD_NAME(srcpad), GST_DEBUG_PAD_NAME(sinkpad));
}
/**
* gst_pad_set_parent:
* @pad: the pad to set the parent
* @parent: the object to set the parent to
*
* Sets the parent object of a pad.
*/
void
gst_pad_set_parent (GstPad *pad,
GstObject *parent)
{
g_return_if_fail (pad != NULL);
g_return_if_fail (GST_IS_PAD (pad));
g_return_if_fail (GST_PAD_PARENT (pad) == NULL);
g_return_if_fail (parent != NULL);
g_return_if_fail (GTK_IS_OBJECT (parent));
g_return_if_fail ((gpointer)pad != (gpointer)parent);
gst_object_set_parent (GST_OBJECT (pad), parent);
}
/**
* gst_pad_get_parent:
* @pad: the pad to get the parent from
*
* Get the parent object of this pad.
*
* Returns: the parent object
*/
GstObject*
gst_pad_get_parent (GstPad *pad)
{
g_return_val_if_fail (pad != NULL, NULL);
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
return GST_OBJECT_PARENT (pad);
}
/**
* gst_pad_add_ghost_pad:
* @pad: the pad to set the ghost parent
* @ghostpad: the ghost pad to add
*
* Add a ghost pad to a pad.
*/
void
gst_pad_add_ghost_pad (GstPad *pad,
GstPad *ghostpad)
{
GstRealPad *realpad;
g_return_if_fail (pad != NULL);
g_return_if_fail (GST_IS_PAD (pad));
g_return_if_fail (ghostpad != NULL);
g_return_if_fail (GST_IS_GHOST_PAD (ghostpad));
realpad = GST_PAD_REALIZE(pad);
realpad->ghostpads = g_list_prepend (realpad->ghostpads, ghostpad);
}
/**
* gst_pad_remove_ghost_pad:
* @pad: the pad to remove the ghost parent
* @ghostpad: the ghost pad to remove from the pad
*
* Remove a ghost pad from a pad.
*/
void
gst_pad_remove_ghost_pad (GstPad *pad,
GstPad *ghostpad)
{
GstRealPad *realpad;
g_return_if_fail (pad != NULL);
g_return_if_fail (GST_IS_PAD (pad));
g_return_if_fail (ghostpad != NULL);
g_return_if_fail (GST_IS_GHOST_PAD (ghostpad));
realpad = GST_PAD_REALIZE (pad);
realpad->ghostpads = g_list_remove (realpad->ghostpads, ghostpad);
}
/**
* gst_pad_get_ghost_pad_list:
* @pad: the pad to get the ghost parents from
*
* Get the ghost parents of this pad.
*
* Returns: a GList of ghost pads
*/
GList*
gst_pad_get_ghost_pad_list (GstPad *pad)
{
g_return_val_if_fail (pad != NULL, NULL);
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
return GST_PAD_REALIZE(pad)->ghostpads;
}
/**
* gst_pad_set_caps_list:
* @pad: the pad to set the caps to
* @caps: a GList of the capabilities to attach to this pad
*
* Set the capabilities of this pad.
*/
void
gst_pad_set_caps_list (GstPad *pad,
GList *caps)
{
g_return_if_fail (pad != NULL);
g_return_if_fail (GST_IS_REAL_PAD (pad)); // NOTE this restriction
GST_PAD_CAPS(pad) = caps;
}
/**
* gst_pad_get_caps_list:
* @pad: the pad to get the capabilities from
*
* Get the capabilities of this pad.
*
* Returns: a list of the capabilities of this pad
*/
GList *
gst_pad_get_caps_list (GstPad *pad)
{
g_return_val_if_fail (pad != NULL, NULL);
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
return GST_PAD_CAPS(pad);
}
/**
* gst_pad_get_caps_by_name:
* @pad: the pad to get the capabilities from
* @name: the name of the capability to get
*
* Get the capabilities with the given name from this pad.
*
* Returns: a capability or NULL if not found
*/
GstCaps *
gst_pad_get_caps_by_name (GstPad *pad, gchar *name)
{
GList *caps;
g_return_val_if_fail (pad != NULL, NULL);
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
caps = GST_PAD_CAPS(pad);
while (caps) {
GstCaps *cap = (GstCaps *)caps->data;
if (!strcmp (cap->name, name))
return cap;
caps = g_list_next (caps);
}
return NULL;
}
/**
* gst_pad_check_compatibility:
* @srcpad: the srcpad to check
* @sinkpad: the sinkpad to check against
*
* Check if two pads have compatible capabilities.
*
* Returns: TRUE if they are compatible or the capabilities
* could not be checked
*/
gboolean
gst_pad_check_compatibility (GstPad *srcpad, GstPad *sinkpad)
{
GstRealPad *realsrc, *realsink;
g_return_val_if_fail (srcpad != NULL, FALSE);
g_return_val_if_fail (GST_IS_PAD (srcpad), FALSE);
g_return_val_if_fail (sinkpad != NULL, FALSE);
g_return_val_if_fail (GST_IS_PAD (sinkpad), FALSE);
realsrc = GST_PAD_REALIZE(srcpad);
realsink = GST_PAD_REALIZE(sinkpad);
if (GST_RPAD_CAPS(realsrc) && GST_RPAD_CAPS(realsink)) {
if (!gst_caps_list_check_compatibility (GST_RPAD_CAPS(realsrc), GST_RPAD_CAPS(realsink))) {
return FALSE;
}
else {
return TRUE;
}
}
else {
GST_DEBUG (0,"gstpad: could not check capabilities of pads (%s:%s) and (%s:%s)\n",
GST_DEBUG_PAD_NAME (srcpad), GST_DEBUG_PAD_NAME (sinkpad));
return TRUE;
}
}
/**
* gst_pad_get_peer:
* @pad: the pad to get the peer from
*
* Get the peer pad of this pad.
*
* Returns: the peer pad
*/
GstPad*
gst_pad_get_peer (GstPad *pad)
{
g_return_val_if_fail (pad != NULL, NULL);
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
return GST_PAD(GST_PAD_PEER(pad));
}
// FIXME this needs to be rethought soon
static void
gst_real_pad_destroy (GtkObject *object)
{
GstPad *pad = GST_PAD (object);
// g_print("in gst_pad_real_destroy()\n");
g_list_free (GST_REAL_PAD(pad)->ghostpads);
}
/**
* gst_pad_load_and_connect:
* @self: the XML node to read the description from
* @parent: the element that has the pad
*
* Read the pad definition from the XML node and connect the given pad
* in element to a pad of an element up in the hierarchy.
*/
void
gst_pad_load_and_connect (xmlNodePtr self,
GstObject *parent)
{
xmlNodePtr field = self->xmlChildrenNode;
GstPad *pad = NULL, *targetpad;
guchar *peer = NULL;
gchar **split;
GstElement *target;
GstObject *grandparent;
while (field) {
if (!strcmp (field->name, "name")) {
pad = gst_element_get_pad (GST_ELEMENT (parent), xmlNodeGetContent (field));
}
else if (!strcmp(field->name, "peer")) {
peer = g_strdup (xmlNodeGetContent (field));
}
field = field->next;
}
g_return_if_fail (pad != NULL);
if (peer == NULL) return;
split = g_strsplit (peer, ".", 2);
g_return_if_fail (split[0] != NULL);
g_return_if_fail (split[1] != NULL);
grandparent = gst_object_get_parent (parent);
if (grandparent && GST_IS_BIN (grandparent)) {
target = gst_bin_get_by_name_recurse_up (GST_BIN (grandparent), split[0]);
}
else
goto cleanup;
if (target == NULL) goto cleanup;
targetpad = gst_element_get_pad (target, split[1]);
if (targetpad == NULL) goto cleanup;
gst_pad_connect (pad, targetpad);
cleanup:
g_strfreev (split);
}
/**
* gst_pad_save_thyself:
* @pad: the pad to save
* @parent: the parent XML node to save the description in
*
* Saves the pad into an xml representation
*
* Returns: the xml representation of the pad
*/
static xmlNodePtr
gst_pad_save_thyself (GstObject *object,
xmlNodePtr parent)
{
GstRealPad *realpad;
GstPad *peer;
g_return_val_if_fail (GST_IS_REAL_PAD (object), NULL);
realpad = GST_REAL_PAD(object);
xmlNewChild(parent,NULL,"name", GST_PAD_NAME (realpad));
if (GST_RPAD_PEER(realpad) != NULL) {
peer = GST_PAD(GST_RPAD_PEER(realpad));
// first check to see if the peer's parent's parent is the same
// we just save it off
xmlNewChild(parent,NULL,"peer",g_strdup_printf("%s.%s",
GST_OBJECT_NAME (GST_PAD_PARENT (peer)), GST_PAD_NAME (peer)));
} else
xmlNewChild(parent,NULL,"peer","");
return parent;
}
/**
* gst_pad_ghost_save_thyself:
* @pad: the pad to save
* @bin: the bin
* @parent: the parent XML node to save the description in
*
* Saves the ghost pad into an xml representation.
*
* Returns: the xml representation of the pad
*/
xmlNodePtr
gst_pad_ghost_save_thyself (GstPad *pad,
GstElement *bin,
xmlNodePtr parent)
{
xmlNodePtr self;
g_return_val_if_fail (GST_IS_GHOST_PAD (pad), NULL);
self = xmlNewChild(parent,NULL,"ghostpad",NULL);
xmlNewChild(self,NULL,"name", GST_PAD_NAME (pad));
xmlNewChild(self,NULL,"parent", GST_OBJECT_NAME (GST_PAD_PARENT (pad)));
// FIXME FIXME FIXME!
return self;
}
#ifndef gst_pad_push
/**
* gst_pad_push:
* @pad: the pad to push
* @buf: the buffer to push
*
* Push a buffer to the peer of the pad.
*/
void
gst_pad_push (GstPad *pad, GstBuffer *buf)
{
GstRealPad *peer = GST_RPAD_PEER (pad);
g_return_if_fail (peer != NULL);
GST_DEBUG_ENTER ("(%s:%s)", GST_DEBUG_PAD_NAME (pad));
if (peer->pushfunc) {
GST_DEBUG (0, "calling pushfunc &%s of peer pad %s:%s\n",
GST_DEBUG_FUNCPTR_NAME (peer->pushfunc), GST_DEBUG_PAD_NAME (((GstPad*)peer)));
(peer->pushfunc) (((GstPad*)peer), buf);
} else
GST_DEBUG (0, "no pushfunc\n");
}
#endif
#ifndef gst_pad_pull
/**
* gst_pad_pull:
* @pad: the pad to pull
*
* Pull a buffer from the peer pad.
*
* Returns: a new buffer from the peer pad.
*/
GstBuffer*
gst_pad_pull (GstPad *pad)
{
GstRealPad *peer = GST_RPAD_PEER(pad);
g_return_if_fail (peer != NULL);
GST_DEBUG_ENTER("(%s:%s)",GST_DEBUG_PAD_NAME(pad));
if (peer->pullfunc) {
GST_DEBUG (0,"calling pullfunc &%s (@%p) of peer pad %s:%s\n",
GST_DEBUG_FUNCPTR_NAME(peer->pullfunc),&peer->pullfunc,GST_DEBUG_PAD_NAME(((GstPad*)peer)));
return (peer->pullfunc)(((GstPad*)peer));
} else {
GST_DEBUG (0,"no pullfunc for peer pad %s:%s at %p\n",GST_DEBUG_PAD_NAME(((GstPad*)peer)),&peer->pullfunc);
return NULL;
}
}
#endif
#ifndef gst_pad_pullregion
/**
* gst_pad_pullregion:
* @pad: the pad to pull the region from
* @type: the regiontype
* @offset: the offset/start of the buffer to pull
* @len: the length of the buffer to pull
*
* Pull a buffer region from the peer pad. The region to pull can be
* specified with a offset/lenght pair or with a start/legnth time
* indicator as specified by the type parameter.
*
* Returns: a new buffer from the peer pad with data in the specified
* region.
*/
GstBuffer*
gst_pad_pullregion (GstPad *pad, GstRegionType type, guint64 offset, guint64 len)
{
GstRealPad *peer = GST_RPAD_PEER(pad);
g_return_if_fail (peer != NULL);
GST_DEBUG_ENTER("(%s:%s,%d,%lld,%lld)",GST_DEBUG_PAD_NAME(pad),type,offset,len);
if (peer->pullregionfunc) {
GST_DEBUG (0,"calling pullregionfunc &%s of peer pad %s:%s\n",
GST_DEBUG_FUNCPTR_NAME(peer->pullregionfunc),GST_DEBUG_PAD_NAME(((GstPad*)peer)));
return (peer->pullregionfunc)(((GstPad*)peer),type,offset,len);
} else {
GST_DEBUG (0,"no pullregionfunc\n");
return NULL;
}
}
#endif
/************************************************************************
*
* templates
*
*/
/**
* gst_padtemplate_new:
* @factory: the padfactory to use
*
* Creates a new padtemplate from the factory.
*
* Returns: the new padtemplate
*/
GstPadTemplate*
gst_padtemplate_new (GstPadFactory *factory)
{
GstPadTemplate *new;
GstPadFactoryEntry tag;
gint i = 0;
guint counter = 0;
g_return_val_if_fail (factory != NULL, NULL);
new = g_new0 (GstPadTemplate, 1);
tag = (*factory)[i++];
g_return_val_if_fail (tag != NULL, new);
new->name_template = g_strdup ((gchar *)tag);
tag = (*factory)[i++];
new->direction = GPOINTER_TO_UINT (tag);
tag = (*factory)[i++];
new->presence = GPOINTER_TO_UINT (tag);
tag = (*factory)[i++];
while (GPOINTER_TO_INT (tag) == 1) {
new->caps = g_list_append (new->caps, gst_caps_register_count ((GstCapsFactory *)&(*factory)[i], &counter));
i+=counter;
tag = (*factory)[i++];
}
return new;
}
/**
* gst_padtemplate_create:
* @name_template: the name template
* @direction: the direction for the template
* @presence: the presence of the pad
* @caps: a list of capabilities for the template
*
* Creates a new padtemplate from the given arguments.
*
* Returns: the new padtemplate
*/
GstPadTemplate*
gst_padtemplate_create (gchar *name_template,
GstPadDirection direction, GstPadPresence presence,
GList *caps)
{
GstPadTemplate *new;
new = g_new0 (GstPadTemplate, 1);
new->name_template = name_template;
new->direction = direction;
new->presence = presence;
new->caps = caps;
return new;
}
/**
* gst_padtemplate_save_thyself:
* @templ: the padtemplate to save
* @parent: the parent XML tree
*
* Saves the padtemplate into XML.
*
* Returns: the new XML tree
*/
xmlNodePtr
gst_padtemplate_save_thyself (GstPadTemplate *templ, xmlNodePtr parent)
{
xmlNodePtr subtree;
GList *caps;
guchar *presence;
xmlNewChild(parent,NULL,"nametemplate", templ->name_template);
xmlNewChild(parent,NULL,"direction", (templ->direction == GST_PAD_SINK? "sink":"src"));
switch (templ->presence) {
case GST_PAD_ALWAYS:
presence = "always";
break;
case GST_PAD_SOMETIMES:
presence = "sometimes";
break;
case GST_PAD_REQUEST:
presence = "request";
break;
default:
presence = "unknown";
break;
}
xmlNewChild(parent,NULL,"presence", presence);
caps = templ->caps;
while (caps) {
GstCaps *cap = (GstCaps *)caps->data;
subtree = xmlNewChild (parent, NULL, "caps", NULL);
gst_caps_save_thyself (cap, subtree);
caps = g_list_next (caps);
}
return parent;
}
/**
* gst_padtemplate_load_thyself:
* @parent: the source XML tree
*
* Loads a padtemplate from the XML tree.
*
* Returns: the new padtemplate
*/
GstPadTemplate*
gst_padtemplate_load_thyself (xmlNodePtr parent)
{
xmlNodePtr field = parent->xmlChildrenNode;
GstPadTemplate *factory = g_new0 (GstPadTemplate, 1);
while (field) {
if (!strcmp(field->name, "nametemplate")) {
factory->name_template = xmlNodeGetContent(field);
}
if (!strcmp(field->name, "direction")) {
gchar *value = xmlNodeGetContent(field);
factory->direction = GST_PAD_UNKNOWN;
if (!strcmp(value, "sink")) {
factory->direction = GST_PAD_SINK;
}
else if (!strcmp(value, "src")) {
factory->direction = GST_PAD_SRC;
}
g_free (value);
}
if (!strcmp(field->name, "presence")) {
gchar *value = xmlNodeGetContent(field);
if (!strcmp(value, "always")) {
factory->presence = GST_PAD_ALWAYS;
}
else if (!strcmp(value, "sometimes")) {
factory->presence = GST_PAD_SOMETIMES;
}
else if (!strcmp(value, "request")) {
factory->presence = GST_PAD_REQUEST;
}
g_free (value);
}
else if (!strcmp(field->name, "caps")) {
factory->caps = g_list_append(factory->caps, gst_caps_load_thyself (field));
}
field = field->next;
}
return factory;
}
static gboolean
gst_pad_eos_func(GstPad *pad)
{
GstElement *element;
GList *pads;
GstPad *srcpad;
gboolean result = TRUE, success;
g_return_val_if_fail (pad != NULL, FALSE);
g_return_val_if_fail (GST_IS_REAL_PAD(pad), FALSE); // NOTE the restriction
GST_INFO (GST_CAT_PADS,"attempting to set EOS on sink pad %s:%s",GST_DEBUG_PAD_NAME(pad));
element = GST_ELEMENT (gst_object_get_parent (GST_OBJECT (pad)));
// g_return_val_if_fail (element != NULL, FALSE);
// g_return_val_if_fail (GST_IS_ELEMENT(element), FALSE);
pads = gst_element_get_pad_list(element);
while (pads) {
srcpad = GST_PAD(pads->data);
pads = g_list_next(pads);
if (gst_pad_get_direction(srcpad) == GST_PAD_SRC) {
result = gst_pad_eos(GST_REAL_PAD(srcpad));
if (result == FALSE) success = FALSE;
}
}
if (result == FALSE) return FALSE;
GST_INFO (GST_CAT_PADS,"set EOS on sink pad %s:%s",GST_DEBUG_PAD_NAME(pad));
GST_FLAG_SET (pad, GST_PAD_EOS);
return TRUE;
}
/**
* gst_pad_set_eos:
* @pad: the pad to set to eos
*
* Sets the given pad to the EOS state.
*
* Returns: TRUE if it succeeded
*/
gboolean
gst_pad_set_eos(GstPad *pad)
{
g_return_val_if_fail (pad != NULL, FALSE);
g_return_val_if_fail (GST_IS_REAL_PAD(pad), FALSE); // NOTE the restriction
g_return_val_if_fail (GST_PAD_CONNECTED(pad), FALSE);
GST_INFO (GST_CAT_PADS,"attempting to set EOS on src pad %s:%s",GST_DEBUG_PAD_NAME(pad));
if (!gst_pad_eos(GST_REAL_PAD(pad))) {
return FALSE;
}
GST_INFO (GST_CAT_PADS,"set EOS on src pad %s:%s",GST_DEBUG_PAD_NAME(pad));
GST_FLAG_SET (pad, GST_PAD_EOS);
gst_element_signal_eos (GST_ELEMENT (GST_PAD_PARENT (pad)));
return TRUE;
}
/**
* gst_pad_set_element_private:
* @pad: the pad to set the private data to
* @priv: The private data to attach to the pad
*
* Set the given private data pointer to the pad. This
* function can only be used by the element that own the
* pad.
*/
void
gst_pad_set_element_private (GstPad *pad, gpointer priv)
{
pad->element_private = priv;
}
/**
* gst_pad_get_element_private:
* @pad: the pad to get the private data of
*
* Get the private data of a pad. The private data can
* only be set by the parent element of this pad.
*
* Returns: a pointer to the private data.
*/
gpointer
gst_pad_get_element_private (GstPad *pad)
{
return pad->element_private;
}
/***** ghost pads *****/
static void gst_ghost_pad_class_init (GstGhostPadClass *klass);
static void gst_ghost_pad_init (GstGhostPad *pad);
static GstPad *ghost_pad_parent_class = NULL;
//static guint gst_ghost_pad_signals[LAST_SIGNAL] = { 0 };
GtkType
gst_ghost_pad_get_type(void) {
static GtkType pad_type = 0;
if (!pad_type) {
static const GtkTypeInfo pad_info = {
"GstGhostPad",
sizeof(GstGhostPad),
sizeof(GstGhostPadClass),
(GtkClassInitFunc)gst_ghost_pad_class_init,
(GtkObjectInitFunc)gst_ghost_pad_init,
(GtkArgSetFunc)NULL,
(GtkArgGetFunc)NULL,
(GtkClassInitFunc)NULL,
};
pad_type = gtk_type_unique(GST_TYPE_PAD,&pad_info);
}
return pad_type;
}
static void
gst_ghost_pad_class_init (GstGhostPadClass *klass)
{
GtkObjectClass *gtkobject_class;
gtkobject_class = (GtkObjectClass*)klass;
ghost_pad_parent_class = gtk_type_class(GST_TYPE_PAD);
}
static void
gst_ghost_pad_init (GstGhostPad *pad)
{
pad->realpad = NULL;
}
/**
* gst_ghost_pad_new:
* @name: name of the new ghost pad
* @pad: the pad to create a ghost pad of
*
* Create a new ghost pad associated with the given pad.
*
* Returns: new ghost pad
*/
GstPad*
gst_ghost_pad_new (gchar *name,
GstPad *pad)
{
GstGhostPad *ghostpad;
g_return_val_if_fail (name != NULL, NULL);
g_return_val_if_fail (GST_IS_PAD(pad), NULL);
ghostpad = gtk_type_new (gst_ghost_pad_get_type ());
gst_pad_set_name (GST_PAD (ghostpad), name);
GST_GPAD_REALPAD(ghostpad) = GST_PAD_REALIZE(pad);
// add ourselves to the real pad's list of ghostpads
gst_pad_add_ghost_pad (pad, GST_PAD(ghostpad));
// FIXME need to ref the real pad here... ?
GST_DEBUG(0,"created ghost pad \"%s\"\n",name);
return GST_PAD(ghostpad);
}
Reference in a new issue View git blame Copy permalink