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Element that decodes images using gdk_pixbuf

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Original commit message from CVS:
Element that decodes images using gdk_pixbuf
This commit is contained in:
David Schleef 2003-06-25 03:17:35 +00:00
parent bbf74571a7
commit 5834688244
3 changed files with 417 additions and 0 deletions
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11
ext/gdk_pixbuf/Makefile.am Normal file
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plugindir = $(libdir)/gstreamer-@GST_MAJORMINOR@
plugin_LTLIBRARIES = libgstgdkpixbuf.la
libgstgdkpixbuf_la_SOURCES = gstgdkpixbuf.c
libgstgdkpixbuf_la_CFLAGS = $(GST_CFLAGS) $(GTK_CFLAGS)
libgstgdkpixbuf_la_LIBADD = $(GTK_LIBS)
libgstgdkpixbuf_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
noinst_HEADERS = gstgdkpixbuf.h

358
ext/gdk_pixbuf/gstgdkpixbuf.c Normal file
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/*
* gstgdkpixbuf.c
* GStreamer
* Copyright (C) 1999-2001 Erik Walthinsen <omega@cse.ogi.edu>
* Copyright (C) 2003 David A. 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 <gst/gst.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <string.h>
#include "gstgdkpixbuf.h"
static GstElementDetails plugin_details = {
"GdkPixbuf image decoder",
"Codecs/GdkPixbuf",
"LGPL",
"Decodes images in a video stream using GdkPixbuf",
VERSION,
"David A. Schleef <ds@schleef.org>",
"(C) 2002, 2003"
};
/* Filter signals and args */
enum {
/* FILL ME */
LAST_SIGNAL
};
enum {
ARG_0,
ARG_SILENT
};
GST_PAD_TEMPLATE_FACTORY (gst_gdk_pixbuf_sink_factory,
"sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_CAPS_NEW("gdk_pixbuf_sink", "image/png", NULL),
GST_CAPS_NEW("gdk_pixbuf_sink", "image/jpeg", NULL),
GST_CAPS_NEW("gdk_pixbuf_sink", "image/gif", NULL),
GST_CAPS_NEW("gdk_pixbuf_sink", "image/x-icon", NULL),
GST_CAPS_NEW("gdk_pixbuf_sink", "application/x-navi-animation", NULL),
GST_CAPS_NEW("gdk_pixbuf_sink", "image/x-cmu-raster", NULL),
GST_CAPS_NEW("gdk_pixbuf_sink", "image/x-sun-raster", NULL),
GST_CAPS_NEW("gdk_pixbuf_sink", "image/x-pixmap", NULL),
GST_CAPS_NEW("gdk_pixbuf_sink", "image/tiff", NULL),
GST_CAPS_NEW("gdk_pixbuf_sink", "image/x-portable-anymap", NULL),
GST_CAPS_NEW("gdk_pixbuf_sink", "image/x-portable-bitmap", NULL),
GST_CAPS_NEW("gdk_pixbuf_sink", "image/x-portable-graymap", NULL),
GST_CAPS_NEW("gdk_pixbuf_sink", "image/x-portable-pixmap", NULL),
GST_CAPS_NEW("gdk_pixbuf_sink", "image/bmp", NULL),
GST_CAPS_NEW("gdk_pixbuf_sink", "image/x-bmp", NULL),
GST_CAPS_NEW("gdk_pixbuf_sink", "image/x-MS-bmp", NULL),
GST_CAPS_NEW("gdk_pixbuf_sink", "image/vnd.wap.wbmp", NULL),
GST_CAPS_NEW("gdk_pixbuf_sink", "image/x-bitmap", NULL),
GST_CAPS_NEW("gdk_pixbuf_sink", "image/x-tga", NULL)
);
GST_PAD_TEMPLATE_FACTORY (gst_gdk_pixbuf_src_factory,
"src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_CAPS_NEW(
"gdk_pixbuf_src",
"video/raw",
"format", GST_PROPS_FOURCC(GST_MAKE_FOURCC('R','G','B',' ')),
"width", GST_PROPS_INT_RANGE(1,INT_MAX),
"height", GST_PROPS_INT_RANGE(1,INT_MAX),
"bpp", GST_PROPS_INT(32),
"depth", GST_PROPS_INT(24),
"endianness", GST_PROPS_INT(G_BIG_ENDIAN),
"red_mask", GST_PROPS_INT(0x00ff0000),
"green_mask", GST_PROPS_INT(0x0000ff00),
"blue_mask", GST_PROPS_INT(0x000000ff)
)
);
static void gst_gdk_pixbuf_class_init (GstGdkPixbufClass *klass);
static void gst_gdk_pixbuf_init (GstGdkPixbuf *filter);
static void gst_gdk_pixbuf_set_property(GObject *object, guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gst_gdk_pixbuf_get_property(GObject *object, guint prop_id,
GValue *value,
GParamSpec *pspec);
static void gst_gdk_pixbuf_chain (GstPad *pad, GstBuffer *buf);
static GstElementClass *parent_class = NULL;
static GstPadLinkReturn
gst_gdk_pixbuf_sink_link (GstPad *pad, GstCaps *caps)
{
GstGdkPixbuf *filter;
filter = GST_GDK_PIXBUF (gst_pad_get_parent (pad));
g_return_val_if_fail (filter != NULL, GST_PAD_LINK_REFUSED);
g_return_val_if_fail (GST_IS_GDK_PIXBUF (filter),
GST_PAD_LINK_REFUSED);
if (GST_CAPS_IS_FIXED (caps))
{
return GST_PAD_LINK_OK;
}
return GST_PAD_LINK_DELAYED;
}
static GstCaps *gst_gdk_pixbuf_get_capslist(void)
{
GSList *slist;
GSList *slist0;
GdkPixbufFormat *pixbuf_format;
char **mimetypes;
char **mimetype;
static GstCaps *capslist = NULL;
if(capslist==NULL){
slist0 = gdk_pixbuf_get_formats();
for(slist = slist0;slist;slist=g_slist_next(slist)){
pixbuf_format = slist->data;
mimetypes = gdk_pixbuf_format_get_mime_types(pixbuf_format);
for(mimetype = mimetypes; *mimetype; mimetype++){
capslist = gst_caps_append(capslist, gst_caps_new("ack",*mimetype,NULL));
}
g_free(mimetypes);
}
gst_caps_ref(capslist);
gst_caps_sink(capslist);
g_slist_free(slist0);
g_print("%s\n",gst_caps_to_string(capslist));
}
return capslist;
}
static GstCaps *gst_gdk_pixbuf_sink_getcaps(GstPad *pad, GstCaps *caps)
{
GstGdkPixbuf *filter;
filter = GST_GDK_PIXBUF (gst_pad_get_parent (pad));
g_return_val_if_fail (filter != NULL, NULL);
g_return_val_if_fail (GST_IS_GDK_PIXBUF (filter), NULL);
return gst_gdk_pixbuf_get_capslist();
}
GType
gst_gdk_pixbuf_get_type (void)
{
static GType plugin_type = 0;
if (!plugin_type)
{
static const GTypeInfo plugin_info =
{
sizeof (GstGdkPixbufClass),
NULL,
NULL,
(GClassInitFunc) gst_gdk_pixbuf_class_init,
NULL,
NULL,
sizeof (GstGdkPixbuf),
0,
(GInstanceInitFunc) gst_gdk_pixbuf_init,
};
plugin_type = g_type_register_static (GST_TYPE_ELEMENT,
"GstGdkPixbuf",
&plugin_info, 0);
}
return plugin_type;
}
/* initialize the plugin's class */
static void
gst_gdk_pixbuf_class_init (GstGdkPixbufClass *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 (gobject_class, ARG_SILENT,
g_param_spec_boolean ("silent", "Silent", "Produce verbose output ?",
FALSE, G_PARAM_READWRITE));
gobject_class->set_property = gst_gdk_pixbuf_set_property;
gobject_class->get_property = gst_gdk_pixbuf_get_property;
}
static void
gst_gdk_pixbuf_init (GstGdkPixbuf *filter)
{
filter->sinkpad = gst_pad_new_from_template (gst_gdk_pixbuf_sink_factory (),
"sink");
gst_pad_set_link_function (filter->sinkpad, gst_gdk_pixbuf_sink_link);
gst_pad_set_getcaps_function (filter->sinkpad, gst_gdk_pixbuf_sink_getcaps);
filter->srcpad = gst_pad_new_from_template (gst_gdk_pixbuf_src_factory (),
"src");
gst_element_add_pad (GST_ELEMENT (filter), filter->sinkpad);
gst_element_add_pad (GST_ELEMENT (filter), filter->srcpad);
gst_pad_set_chain_function (filter->sinkpad, gst_gdk_pixbuf_chain);
}
static void
gst_gdk_pixbuf_chain (GstPad *pad, GstBuffer *buf)
{
GstGdkPixbuf *filter;
GdkPixbufLoader *pixbuf_loader;
GdkPixbuf *pixbuf;
GstBuffer *outbuf;
GError *error = NULL;
g_print("gst_gdk_pixbuf_chain\n");
g_return_if_fail (GST_IS_PAD (pad));
g_return_if_fail (buf != NULL);
filter = GST_GDK_PIXBUF (GST_OBJECT_PARENT (pad));
g_return_if_fail (GST_IS_GDK_PIXBUF (filter));
pixbuf_loader = gdk_pixbuf_loader_new();
//pixbuf_loader = gdk_pixbuf_loader_new_with_type("gif");
gdk_pixbuf_loader_write(pixbuf_loader, GST_BUFFER_DATA(buf),
GST_BUFFER_SIZE(buf), &error);
gdk_pixbuf_loader_close(pixbuf_loader, &error);
pixbuf = gdk_pixbuf_loader_get_pixbuf(pixbuf_loader);
g_print("width=%d height=%d\n", gdk_pixbuf_get_width(pixbuf),
gdk_pixbuf_get_height(pixbuf));
if(filter->image_size == 0){
GstCaps *caps;
filter->width = gdk_pixbuf_get_width(pixbuf);
filter->height = gdk_pixbuf_get_height(pixbuf);
filter->rowstride = gdk_pixbuf_get_rowstride(pixbuf);
filter->image_size = filter->rowstride * filter->height;
caps = gst_pad_get_caps(filter->srcpad);
gst_caps_set(caps, "width", GST_PROPS_INT(filter->width));
gst_caps_set(caps, "height", GST_PROPS_INT(filter->height));
gst_pad_try_set_caps(filter->srcpad, caps);
}
outbuf = gst_buffer_new();
GST_BUFFER_TIMESTAMP(outbuf) = GST_BUFFER_TIMESTAMP(buf);
GST_BUFFER_DURATION(outbuf) = GST_BUFFER_DURATION(buf);
GST_BUFFER_SIZE(outbuf) = filter->image_size;
GST_BUFFER_DATA(outbuf) = g_malloc(filter->image_size);
memcpy(GST_BUFFER_DATA(outbuf), gdk_pixbuf_get_pixels(pixbuf),
filter->image_size);
g_object_unref(G_OBJECT(pixbuf_loader));
gst_pad_push (filter->srcpad, outbuf);
}
static void
gst_gdk_pixbuf_set_property (GObject *object, guint prop_id,
const GValue *value, GParamSpec *pspec)
{
GstGdkPixbuf *filter;
g_return_if_fail (GST_IS_GDK_PIXBUF (object));
filter = GST_GDK_PIXBUF (object);
switch (prop_id)
{
case ARG_SILENT:
//filter->silent = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_gdk_pixbuf_get_property (GObject *object, guint prop_id,
GValue *value, GParamSpec *pspec)
{
GstGdkPixbuf *filter;
g_return_if_fail (GST_IS_GDK_PIXBUF (object));
filter = GST_GDK_PIXBUF (object);
switch (prop_id) {
case ARG_SILENT:
//g_value_set_boolean (value, filter->silent);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/* entry point to initialize the plug-in
* initialize the plug-in itself
* register the element factories and pad templates
* register the features
*/
static gboolean
plugin_init (GModule *module, GstPlugin *plugin)
{
GstElementFactory *factory;
factory = gst_element_factory_new ("gdkpixbufdec", GST_TYPE_GDK_PIXBUF,
&plugin_details);
g_return_val_if_fail (factory != NULL, FALSE);
gst_element_factory_add_pad_template (factory,
gst_gdk_pixbuf_src_factory ());
gst_element_factory_add_pad_template (factory,
gst_gdk_pixbuf_sink_factory ());
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
/* plugin initialisation succeeded */
return TRUE;
}
/* this is the structure that gst-register looks for
* so keep the name plugin_desc, or you cannot get your plug-in registered */
GstPluginDesc plugin_desc = {
GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"gdkpixbuf",
plugin_init
};

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ext/gdk_pixbuf/gstgdkpixbuf.h Normal file
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/*
* gstplugin.h: sample header file for plug-in
*/
#ifndef __GST_GDK_PIXBUF_H__
#define __GST_GDK_PIXBUF_H__
#include <gst/gst.h>
G_BEGIN_DECLS
/* #define's don't like whitespacey bits */
#define GST_TYPE_GDK_PIXBUF \
(gst_gdk_pixbuf_get_type())
#define GST_GDK_PIXBUF(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_GDK_PIXBUF,GstGdkPixbuf))
#define GST_GDK_PIXBUF_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_GDK_PIXBUF,GstGdkPixbuf))
#define GST_IS_GDK_PIXBUF(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_GDK_PIXBUF))
#define GST_IS_GDK_PIXBUF_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_GDK_PIXBUF))
typedef struct _GstGdkPixbuf GstGdkPixbuf;
typedef struct _GstGdkPixbufClass GstGdkPixbufClass;
struct _GstGdkPixbuf
{
GstElement element;
GstPad *sinkpad, *srcpad;
int width;
int height;
int rowstride;
unsigned int image_size;
};
struct _GstGdkPixbufClass
{
GstElementClass parent_class;
};
GType gst_gdk_pixbuf_get_type (void);
G_END_DECLS
#endif /* __GST_GDK_PIXBUF_H__ */