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gst/elements/: New element that acts like an identity, but filters caps. Will eventually replace filtered caps in pa...

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Original commit message from CVS:
* gst/elements/Makefile.am:
* gst/elements/gstcapsfilter.c: New element that acts like an
identity, but filters caps.  Will eventually replace filtered
caps in pad linking.
* gst/gstutils.c: (gst_element_create_all_pads): New function
to create all the ALWAYS pads that are registered with an
element class.  This functionality should eventually be
merged in with GstElement initialization.
* gst/gstutils.h:
* testsuite/trigger/README: part of trigger test code that should
have been checked in a long time ago.
This commit is contained in:
David Schleef 2005-04-23 23:29:47 +00:00
parent 7e89cbf5ba
commit 9dfa6cd089
9 changed files with 559 additions and 0 deletions
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14
ChangeLog
View file

@ -1,3 +1,17 @@
2005-04-23 David Schleef <ds@schleef.org>
* gst/elements/Makefile.am:
* gst/elements/gstcapsfilter.c: New element that acts like an
identity, but filters caps. Will eventually replace filtered
caps in pad linking.
* gst/gstutils.c: (gst_element_create_all_pads): New function
to create all the ALWAYS pads that are registered with an
element class. This functionality should eventually be
merged in with GstElement initialization.
* gst/gstutils.h:
* testsuite/trigger/README: part of trigger test code that should
have been checked in a long time ago.
2005-04-23 David Schleef <ds@schleef.org>
* gst/Makefile.am: Remove as-libtool stuff. It's likely not

2
gst/elements/Makefile.am
View file

@ -12,6 +12,7 @@ pipefilter = gstpipefilter.c
libgstelements_la_DEPENDENCIES = ../libgstreamer-@GST_MAJORMINOR@.la
libgstelements_la_SOURCES = \
gstbufferstore.c \
gstcapsfilter.c \
gstfakesrc.c \
gstfakesink.c \
gstfilesrc.c \
@ -25,6 +26,7 @@ libgstelements_la_SOURCES = \
# these files above, then this will be unnecessary
EXTRA_DIST = \
gstaggregator.c \
gstcapsfilter.c \
gstfilesink.c \
gstfdsink.c \
gstfdsrc.c \

230
gst/elements/gstcapsfilter.c Normal file
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@ -0,0 +1,230 @@
/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
* 2005 Wim Taymans <wim@fluendo.com>
* 2005 David Schleef <ds@schleef.org>
*
* 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 <stdlib.h>
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "../gst-i18n-lib.h"
#include <gst/gstmarshal.h>
#include <gst/gst.h>
#define GST_TYPE_CAPSFILTER \
(gst_capsfilter_get_type())
#define GST_CAPSFILTER(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_CAPSFILTER,GstCapsFilter))
#define GST_CAPSFILTER_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_CAPSFILTER,GstCapsFilterClass))
#define GST_IS_CAPSFILTER(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_CAPSFILTER))
#define GST_IS_CAPSFILTER_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_CAPSFILTER))
typedef struct _GstCapsFilter GstCapsFilter;
typedef struct _GstCapsFilterClass GstCapsFilterClass;
struct _GstCapsFilter
{
GstElement element;
GstPad *srcpad;
GstPad *sinkpad;
GstCaps *filter_caps;
};
struct _GstCapsFilterClass
{
GstElementClass element_class;
};
GType gst_capsfilter_get_type (void);
static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
GST_DEBUG_CATEGORY_STATIC (gst_capsfilter_debug);
#define GST_CAT_DEFAULT gst_capsfilter_debug
GstElementDetails gst_capsfilter_details = GST_ELEMENT_DETAILS ("CapsFilter",
"Generic",
"Pass data without modification, limiting formats",
"David Schleef <ds@schleef.org>");
enum
{
PROP_0,
PROP_FILTER_CAPS
};
#define _do_init(bla) \
GST_DEBUG_CATEGORY_INIT (gst_capsfilter_debug, "capsfilter", 0, "capsfilter element");
GST_BOILERPLATE_FULL (GstCapsFilter, gst_capsfilter, GstElement,
GST_TYPE_ELEMENT, _do_init);
static void gst_capsfilter_finalize (GObject * object);
static void gst_capsfilter_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_capsfilter_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstCaps *gst_capsfilter_getcaps (GstPad * pad);
static GstFlowReturn gst_capsfilter_chain (GstPad * pad, GstBuffer * buf);
static void
gst_capsfilter_base_init (gpointer g_class)
{
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&srctemplate));
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&sinktemplate));
gst_element_class_set_details (gstelement_class, &gst_capsfilter_details);
}
static void
gst_capsfilter_finalize (GObject * object)
{
GstCapsFilter *capsfilter;
capsfilter = GST_CAPSFILTER (object);
gst_caps_unref (capsfilter->filter_caps);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_capsfilter_class_init (GstCapsFilterClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = G_OBJECT_CLASS (klass);
gstelement_class = GST_ELEMENT_CLASS (klass);
gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_capsfilter_set_property);
gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_capsfilter_get_property);
gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_capsfilter_finalize);
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_FILTER_CAPS,
g_param_spec_boxed ("filter_caps", _("Filter caps"),
_("Caps to use to filter the possible allowed formats"),
GST_TYPE_CAPS, G_PARAM_READWRITE));
}
static void
gst_capsfilter_init (GstCapsFilter * capsfilter)
{
gst_element_create_all_pads (GST_ELEMENT (capsfilter));
capsfilter->srcpad = gst_element_get_pad (GST_ELEMENT (capsfilter), "src");
capsfilter->sinkpad = gst_element_get_pad (GST_ELEMENT (capsfilter), "sink");
gst_pad_set_getcaps_function (capsfilter->srcpad, gst_capsfilter_getcaps);
gst_pad_set_getcaps_function (capsfilter->sinkpad, gst_capsfilter_getcaps);
gst_pad_set_chain_function (capsfilter->sinkpad, gst_capsfilter_chain);
capsfilter->filter_caps = gst_caps_new_any ();
}
static GstCaps *
gst_capsfilter_getcaps (GstPad * pad)
{
GstPad *otherpad;
GstCapsFilter *capsfilter = GST_CAPSFILTER (GST_OBJECT_PARENT (pad));
GstCaps *caps;
GstCaps *icaps;
otherpad = (pad == capsfilter->srcpad) ? capsfilter->sinkpad :
capsfilter->srcpad;
caps = gst_pad_peer_get_caps (otherpad);
icaps = gst_caps_intersect (caps, capsfilter->filter_caps);
gst_caps_unref (caps);
return icaps;
}
static GstFlowReturn
gst_capsfilter_chain (GstPad * pad, GstBuffer * buf)
{
GstCapsFilter *capsfilter = GST_CAPSFILTER (GST_PAD_PARENT (pad));
gst_pad_push (capsfilter->srcpad, buf);
return GST_FLOW_OK;
}
static void
gst_capsfilter_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstCapsFilter *capsfilter;
capsfilter = GST_CAPSFILTER (object);
switch (prop_id) {
case PROP_FILTER_CAPS:
capsfilter->filter_caps = gst_caps_copy (gst_value_get_caps (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_capsfilter_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstCapsFilter *capsfilter;
capsfilter = GST_CAPSFILTER (object);
switch (prop_id) {
case PROP_FILTER_CAPS:
gst_value_set_caps (value, capsfilter->filter_caps);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}

32
gst/gstutils.c
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@ -370,6 +370,38 @@ gst_print_element_args (GString * buf, gint indent, GstElement * element)
g_free (specs);
}
/**
* gst_element_create_all_pads:
* @element: a #GstElement to create pads for
*
* Creates a pad for each pad template that is always available.
* This function is only useful during object intialization of
* subclasses of #GstElement.
*/
void
gst_element_create_all_pads (GstElement * element)
{
GList *padlist;
/* FIXME: lock element */
padlist =
gst_element_class_get_pad_template_list (GST_ELEMENT_CLASS
(G_OBJECT_GET_CLASS (element)));
while (padlist) {
GstPadTemplate *padtempl = (GstPadTemplate *) padlist->data;
if (padtempl->presence == GST_PAD_ALWAYS) {
GstPad *pad;
pad = gst_pad_new_from_template (padtempl, padtempl->name_template);
gst_element_add_pad (element, pad);
}
}
}
/**
* gst_element_get_compatible_pad_template:
* @element: a #GstElement to get a compatible pad template for.

1
gst/gstutils.h
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@ -232,6 +232,7 @@ void gst_object_default_error (GstObject * source,
GstFlowReturn gst_element_abort_preroll (GstElement *element);
GstFlowReturn gst_element_finish_preroll (GstElement *element, GstPad *pad);
void gst_element_create_all_pads (GstElement *element);
GstPad* gst_element_get_compatible_pad (GstElement *element, GstPad *pad);
GstPad* gst_element_get_compatible_pad_filtered (GstElement *element, GstPad *pad,
const GstCaps *filtercaps);

2
plugins/elements/Makefile.am
View file

@ -12,6 +12,7 @@ pipefilter = gstpipefilter.c
libgstelements_la_DEPENDENCIES = ../libgstreamer-@GST_MAJORMINOR@.la
libgstelements_la_SOURCES = \
gstbufferstore.c \
gstcapsfilter.c \
gstfakesrc.c \
gstfakesink.c \
gstfilesrc.c \
@ -25,6 +26,7 @@ libgstelements_la_SOURCES = \
# these files above, then this will be unnecessary
EXTRA_DIST = \
gstaggregator.c \
gstcapsfilter.c \
gstfilesink.c \
gstfdsink.c \
gstfdsrc.c \

230
plugins/elements/gstcapsfilter.c Normal file
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@ -0,0 +1,230 @@
/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
* 2005 Wim Taymans <wim@fluendo.com>
* 2005 David Schleef <ds@schleef.org>
*
* 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 <stdlib.h>
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "../gst-i18n-lib.h"
#include <gst/gstmarshal.h>
#include <gst/gst.h>
#define GST_TYPE_CAPSFILTER \
(gst_capsfilter_get_type())
#define GST_CAPSFILTER(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_CAPSFILTER,GstCapsFilter))
#define GST_CAPSFILTER_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_CAPSFILTER,GstCapsFilterClass))
#define GST_IS_CAPSFILTER(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_CAPSFILTER))
#define GST_IS_CAPSFILTER_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_CAPSFILTER))
typedef struct _GstCapsFilter GstCapsFilter;
typedef struct _GstCapsFilterClass GstCapsFilterClass;
struct _GstCapsFilter
{
GstElement element;
GstPad *srcpad;
GstPad *sinkpad;
GstCaps *filter_caps;
};
struct _GstCapsFilterClass
{
GstElementClass element_class;
};
GType gst_capsfilter_get_type (void);
static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
GST_DEBUG_CATEGORY_STATIC (gst_capsfilter_debug);
#define GST_CAT_DEFAULT gst_capsfilter_debug
GstElementDetails gst_capsfilter_details = GST_ELEMENT_DETAILS ("CapsFilter",
"Generic",
"Pass data without modification, limiting formats",
"David Schleef <ds@schleef.org>");
enum
{
PROP_0,
PROP_FILTER_CAPS
};
#define _do_init(bla) \
GST_DEBUG_CATEGORY_INIT (gst_capsfilter_debug, "capsfilter", 0, "capsfilter element");
GST_BOILERPLATE_FULL (GstCapsFilter, gst_capsfilter, GstElement,
GST_TYPE_ELEMENT, _do_init);
static void gst_capsfilter_finalize (GObject * object);
static void gst_capsfilter_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_capsfilter_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstCaps *gst_capsfilter_getcaps (GstPad * pad);
static GstFlowReturn gst_capsfilter_chain (GstPad * pad, GstBuffer * buf);
static void
gst_capsfilter_base_init (gpointer g_class)
{
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&srctemplate));
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&sinktemplate));
gst_element_class_set_details (gstelement_class, &gst_capsfilter_details);
}
static void
gst_capsfilter_finalize (GObject * object)
{
GstCapsFilter *capsfilter;
capsfilter = GST_CAPSFILTER (object);
gst_caps_unref (capsfilter->filter_caps);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_capsfilter_class_init (GstCapsFilterClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = G_OBJECT_CLASS (klass);
gstelement_class = GST_ELEMENT_CLASS (klass);
gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_capsfilter_set_property);
gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_capsfilter_get_property);
gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_capsfilter_finalize);
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_FILTER_CAPS,
g_param_spec_boxed ("filter_caps", _("Filter caps"),
_("Caps to use to filter the possible allowed formats"),
GST_TYPE_CAPS, G_PARAM_READWRITE));
}
static void
gst_capsfilter_init (GstCapsFilter * capsfilter)
{
gst_element_create_all_pads (GST_ELEMENT (capsfilter));
capsfilter->srcpad = gst_element_get_pad (GST_ELEMENT (capsfilter), "src");
capsfilter->sinkpad = gst_element_get_pad (GST_ELEMENT (capsfilter), "sink");
gst_pad_set_getcaps_function (capsfilter->srcpad, gst_capsfilter_getcaps);
gst_pad_set_getcaps_function (capsfilter->sinkpad, gst_capsfilter_getcaps);
gst_pad_set_chain_function (capsfilter->sinkpad, gst_capsfilter_chain);
capsfilter->filter_caps = gst_caps_new_any ();
}
static GstCaps *
gst_capsfilter_getcaps (GstPad * pad)
{
GstPad *otherpad;
GstCapsFilter *capsfilter = GST_CAPSFILTER (GST_OBJECT_PARENT (pad));
GstCaps *caps;
GstCaps *icaps;
otherpad = (pad == capsfilter->srcpad) ? capsfilter->sinkpad :
capsfilter->srcpad;
caps = gst_pad_peer_get_caps (otherpad);
icaps = gst_caps_intersect (caps, capsfilter->filter_caps);
gst_caps_unref (caps);
return icaps;
}
static GstFlowReturn
gst_capsfilter_chain (GstPad * pad, GstBuffer * buf)
{
GstCapsFilter *capsfilter = GST_CAPSFILTER (GST_PAD_PARENT (pad));
gst_pad_push (capsfilter->srcpad, buf);
return GST_FLOW_OK;
}
static void
gst_capsfilter_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstCapsFilter *capsfilter;
capsfilter = GST_CAPSFILTER (object);
switch (prop_id) {
case PROP_FILTER_CAPS:
capsfilter->filter_caps = gst_caps_copy (gst_value_get_caps (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_capsfilter_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstCapsFilter *capsfilter;
capsfilter = GST_CAPSFILTER (object);
switch (prop_id) {
case PROP_FILTER_CAPS:
gst_value_set_caps (value, capsfilter->filter_caps);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}

24
tests/old/testsuite/trigger/README Normal file
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@ -0,0 +1,24 @@
caps issues:
- We can't really tell until PAUSED that 'sinesrc ! identity ! ximagesink'
will fail (since identity has ANY as the pad template caps).
Because of this, it's nearly useless to perform the pad
template check.
Alternatives:
proxy pad template caps, but that reinstates the O(N^2) issue
in 0.8 during linking lots of elements.
remove checking of pad template caps compatibility
add a means of checking a pipeline for caps compatibility before
setting to PAUSED (ugly, requires special processing in each
element)

24
testsuite/trigger/README Normal file
View file

@ -0,0 +1,24 @@
caps issues:
- We can't really tell until PAUSED that 'sinesrc ! identity ! ximagesink'
will fail (since identity has ANY as the pad template caps).
Because of this, it's nearly useless to perform the pad
template check.
Alternatives:
proxy pad template caps, but that reinstates the O(N^2) issue
in 0.8 during linking lots of elements.
remove checking of pad template caps compatibility
add a means of checking a pipeline for caps compatibility before
setting to PAUSED (ugly, requires special processing in each
element)