Commit 23e47de3 authored by David Schleef's avatar David Schleef

GstVideofilter abstract class for video filters

Original commit message from CVS:
GstVideofilter abstract class for video filters
parent 7ec579da
plugindir = $(libdir)/gstreamer-@GST_MAJORMINOR@
plugin_LTLIBRARIES = libgstvideofilter.la
noinst_LTLIBRARIES = libgstvideoexample.la
noinst_HEADERS = gstvideofilter.h gstvideoexample.h
EXTRA_DIST = gstvideotemplate.c gstvideotemplate.h make_filter
libgstvideofilter_la_SOURCES = gstvideofilter.c
libgstvideofilter_la_CFLAGS = $(GST_CFLAGS)
libgstvideofilter_la_LIBADD =
libgstvideofilter_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
libgstvideoexample_la_SOURCES = gstvideoexample.c
libgstvideoexample_la_CFLAGS = $(GST_CFLAGS)
libgstvideoexample_la_LIBADD =
libgstvideoexample_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
# no, this doesn't work if $(srcdir) != (builddir)
gstvideoexample.c gstvideoexample.h: $(srcdir)/make_filter \
$(srcdir)/gstvideotemplate.c $(srcdir)/gstvideotemplate.h
$(srcdir)/make_filter Videoexample
This diff is collapsed.
/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* 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.
*/
#ifndef __GST_VIDEOFILTER_H__
#define __GST_VIDEOFILTER_H__
#include <config.h>
#include <gst/gst.h>
G_BEGIN_DECLS
typedef struct _GstVideofilter GstVideofilter;
typedef struct _GstVideofilterClass GstVideofilterClass;
typedef void (*GstVideofilterFilterFunc)(GstVideofilter *filter,
void *out_data, void *in_data);
typedef void (*GstVideofilterSetupFunc)(GstVideofilter *filter);
typedef struct _GstVideofilterFormat GstVideofilterFormat;
struct _GstVideofilterFormat {
char *fourcc;
int depth;
GstVideofilterFilterFunc filter_func;
int bpp;
unsigned int endianness;
unsigned int red_mask;
unsigned int green_mask;
unsigned int blue_mask;
};
#define GST_TYPE_VIDEOFILTER \
(gst_videofilter_get_type())
#define GST_VIDEOFILTER(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VIDEOFILTER,GstVideofilter))
#define GST_VIDEOFILTER_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VIDEOFILTER,GstVideofilterClass))
#define GST_IS_VIDEOFILTER(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VIDEOFILTER))
#define GST_IS_VIDEOFILTER_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VIDEOFILTER))
struct _GstVideofilter {
GstElement element;
GstPad *sinkpad,*srcpad;
/* video state */
gboolean inited;
GstVideofilterFormat *format;
gint to_width;
gint to_height;
gint from_width;
gint from_height;
gboolean passthru;
/* private */
gint from_buf_size;
gint to_buf_size;
GstBuffer *in_buf;
GstBuffer *out_buf;
};
struct _GstVideofilterClass {
GstElementClass parent_class;
GPtrArray *formats;
GstVideofilterSetupFunc setup;
};
GType gst_videofilter_get_type(void);
int gst_videofilter_get_input_width(GstVideofilter *videofilter);
int gst_videofilter_get_input_height(GstVideofilter *videofilter);
void gst_videofilter_set_output_size(GstVideofilter *videofilter,
int width, int height);
GstVideofilterFormat *gst_videofilter_find_format_by_caps(GstVideofilter *filter,
GstCaps *caps);
GstCaps *gst_videofilter_class_get_capslist(GstVideofilterClass *videofilterclass);
void gst_videofilter_postinit(GstVideofilter *videofilter);
void gst_videofilter_class_add_format(GstVideofilterClass *videofilterclass,
GstVideofilterFormat *format);
G_END_DECLS
#endif /* __GST_VIDEOFILTER_H__ */
/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* Copyright (C) <2003> 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.
*/
/*#define DEBUG_ENABLED */
#include <gstvideotemplate.h>
/* elementfactory information */
static GstElementDetails videotemplate_details = {
"Video Filter Template",
"Filter/Video",
"LGPL",
"Template for a video filter",
VERSION,
"David Schleef <ds@schleef.org>",
"(C) 2003",
};
/* GstVideotemplate signals and args */
enum {
/* FILL ME */
LAST_SIGNAL
};
enum {
ARG_0,
/* FILL ME */
};
static void gst_videotemplate_class_init (GstVideotemplateClass *klass);
static void gst_videotemplate_init (GstVideotemplate *videotemplate);
static void gst_videotemplate_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec);
static void gst_videotemplate_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);
static void gst_videotemplate_planar411(GstVideofilter *videofilter, void *dest, void *src);
static void gst_videotemplate_setup(GstVideofilter *videofilter);
static GstVideotemplateClass *this_class = NULL;
static GstVideofilterClass *parent_class = NULL;
static GstElementClass *element_class = NULL;
GType
gst_videotemplate_get_type (void)
{
static GType videotemplate_type = 0;
if (!videotemplate_type) {
static const GTypeInfo videotemplate_info = {
sizeof(GstVideotemplateClass), NULL,
NULL,
(GClassInitFunc)gst_videotemplate_class_init,
NULL,
NULL,
sizeof(GstVideotemplate),
0,
(GInstanceInitFunc)gst_videotemplate_init,
};
videotemplate_type = g_type_register_static(GST_TYPE_VIDEOFILTER, "GstVideotemplate", &videotemplate_info, 0);
}
return videotemplate_type;
}
static GstVideofilterFormat gst_videotemplate_formats[] = {
{ "I420", 12, gst_videotemplate_planar411, },
};
static void
gst_videotemplate_class_init (GstVideotemplateClass *klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
GstVideofilterClass *gstvideofilter_class;
int i;
gobject_class = (GObjectClass*)klass;
gstelement_class = (GstElementClass*)klass;
gstvideofilter_class = (GstVideofilterClass *)klass;
#if 0
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_METHOD,
g_param_spec_enum("method","method","method",
GST_TYPE_VIDEOTEMPLATE_METHOD, GST_VIDEOTEMPLATE_METHOD_90R,
G_PARAM_READWRITE));
#endif
this_class = klass;
parent_class = g_type_class_ref(GST_TYPE_VIDEOFILTER);
element_class = g_type_class_ref(GST_TYPE_ELEMENT);
gobject_class->set_property = gst_videotemplate_set_property;
gobject_class->get_property = gst_videotemplate_get_property;
gstvideofilter_class->setup = gst_videotemplate_setup;
for(i=0;i<G_N_ELEMENTS(gst_videotemplate_formats);i++){
gst_videofilter_class_add_format(parent_class, gst_videotemplate_formats + i);
}
}
static GstCaps *gst_videotemplate_get_capslist(void)
{
GstVideofilterClass *klass;
klass = g_type_class_ref(GST_TYPE_VIDEOFILTER);
return gst_videofilter_class_get_capslist(klass);
}
static GstPadTemplate *
gst_videotemplate_src_template_factory(void)
{
static GstPadTemplate *templ = NULL;
if(!templ){
GstCaps *caps = GST_CAPS_NEW("src","video/raw",
"width", GST_PROPS_INT_RANGE (0, G_MAXINT),
"height", GST_PROPS_INT_RANGE (0, G_MAXINT));
caps = gst_caps_intersect(caps, gst_videotemplate_get_capslist ());
templ = GST_PAD_TEMPLATE_NEW("src", GST_PAD_SRC, GST_PAD_ALWAYS, caps);
}
return templ;
}
static GstPadTemplate *
gst_videotemplate_sink_template_factory(void)
{
static GstPadTemplate *templ = NULL;
if(!templ){
GstCaps *caps = GST_CAPS_NEW("sink","video/raw",
"width", GST_PROPS_INT_RANGE (0, G_MAXINT),
"height", GST_PROPS_INT_RANGE (0, G_MAXINT));
caps = gst_caps_intersect(caps, gst_videotemplate_get_capslist ());
templ = GST_PAD_TEMPLATE_NEW("src", GST_PAD_SINK, GST_PAD_ALWAYS, caps);
}
return templ;
}
static void
gst_videotemplate_init (GstVideotemplate *videotemplate)
{
GstVideofilter *videofilter;
GST_DEBUG("gst_videotemplate_init");
videofilter = GST_VIDEOFILTER(videotemplate);
videofilter->sinkpad = gst_pad_new_from_template (
GST_PAD_TEMPLATE_GET (gst_videotemplate_sink_template_factory),
"sink");
videofilter->srcpad = gst_pad_new_from_template (
GST_PAD_TEMPLATE_GET (gst_videotemplate_src_template_factory),
"src");
gst_videofilter_postinit(GST_VIDEOFILTER(videotemplate));
}
static void
gst_videotemplate_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
{
GstVideotemplate *src;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail(GST_IS_VIDEOTEMPLATE(object));
src = GST_VIDEOTEMPLATE(object);
GST_DEBUG("gst_videotemplate_set_property");
switch (prop_id) {
#if 0
case ARG_METHOD:
src->method = g_value_get_enum (value);
break;
#endif
default:
break;
}
}
static void
gst_videotemplate_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
{
GstVideotemplate *src;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail(GST_IS_VIDEOTEMPLATE(object));
src = GST_VIDEOTEMPLATE(object);
switch (prop_id) {
#if 0
case ARG_METHOD:
g_value_set_enum (value, src->method);
break;
#endif
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean plugin_init (GModule *module, GstPlugin *plugin)
{
GstElementFactory *factory;
if(!gst_library_load("gstvideofilter"))
return FALSE;
/* create an elementfactory for the videotemplate element */
factory = gst_element_factory_new("videotemplate",GST_TYPE_VIDEOTEMPLATE,
&videotemplate_details);
g_return_val_if_fail(factory != NULL, FALSE);
gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (gst_videotemplate_sink_template_factory));
gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (gst_videotemplate_src_template_factory));
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
return TRUE;
}
GstPluginDesc plugin_desc = {
GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"videotemplate",
plugin_init
};
static void gst_videotemplate_setup(GstVideofilter *videofilter)
{
GstVideotemplate *videotemplate;
g_return_if_fail(GST_IS_VIDEOTEMPLATE(videofilter));
videotemplate = GST_VIDEOTEMPLATE(videofilter);
/* if any setup needs to be done, do it here */
}
static void gst_videotemplate_planar411(GstVideofilter *videofilter,
void *dest, void *src)
{
GstVideotemplate *videotemplate;
g_return_if_fail(GST_IS_VIDEOTEMPLATE(videofilter));
videotemplate = GST_VIDEOTEMPLATE(videofilter);
/* do something interesting here */
}
/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* 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.
*/
#ifndef __GST_VIDEOTEMPLATE_H__
#define __GST_VIDEOTEMPLATE_H__
#include <config.h>
#include <gst/gst.h>
#include "gstvideofilter.h"
G_BEGIN_DECLS
#define GST_TYPE_VIDEOTEMPLATE \
(gst_videotemplate_get_type())
#define GST_VIDEOTEMPLATE(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VIDEOTEMPLATE,GstVideotemplate))
#define GST_VIDEOTEMPLATE_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VIDEOTEMPLATE,GstVideotemplateClass))
#define GST_IS_VIDEOTEMPLATE(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VIDEOTEMPLATE))
#define GST_IS_VIDEOTEMPLATE_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VIDEOTEMPLATE))
typedef struct _GstVideotemplate GstVideotemplate;
typedef struct _GstVideotemplateClass GstVideotemplateClass;
struct _GstVideotemplate {
GstVideofilter videofilter;
};
struct _GstVideotemplateClass {
GstVideofilterClass parent_class;
};
GType gst_videotemplate_get_type(void);
G_END_DECLS
#endif /* __GST_VIDEOTEMPLATE_H__ */
#!/usr/bin/perl
#
if(scalar(@ARGV) < 1){
print "$0 Objectname\n";
print " creates gstobjectname.{c,h} implementing GstObjectname,\n";
print " subclassing GstVideofilter.\n";
exit(0);
}
$Template = $ARGV[0];
($TEMPLATE = $Template) =~ tr/a-z/A-Z/;
($template = $Template) =~ tr/A-Z/a-z/;
open IN, "gstvideotemplate.c";
open OUT, ">gst$template.c";
@lines = <IN>;
map { s/Videotemplate/$Template/g;
s/videotemplate/$template/g;
s/VIDEOTEMPLATE/$TEMPLATE/g;
} @lines;
print OUT @lines;
close IN;
close OUT;
open IN, "gstvideotemplate.h";
open OUT, ">gst$template.h";
@lines = <IN>;
map { s/Videotemplate/$Template/g;
s/videotemplate/$template/g;
s/VIDEOTEMPLATE/$TEMPLATE/g;
} @lines;
print OUT @lines;
close IN;
close OUT;
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