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Add new files for gdk_pixbuf based scaler

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Original commit message from CVS:
Add new files for gdk_pixbuf based scaler
This commit is contained in:
Jan Schmidt 2004-05-15 13:16:40 +00:00
parent 46eb6fd218
commit 1530163b3f
3 changed files with 554 additions and 0 deletions
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11
ChangeLog
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@ -1,3 +1,14 @@
2004-05-15 Jan Schmidt <thaytan@mad.scientisti.com>
* ext/gdk_pixbuf/pixbufscale.c: (gst_pixbufscale_method_get_type),
(gst_pixbufscale_get_type), (gst_pixbufscale_base_init),
(gst_pixbufscale_class_init), (gst_pixbufscale_getcaps),
(gst_pixbufscale_link), (gst_pixbufscale_init),
(gst_pixbufscale_handle_src_event), (pixbufscale_scale),
(gst_pixbufscale_chain), (gst_pixbufscale_set_property),
(gst_pixbufscale_get_property), (pixbufscale_init):
* ext/gdk_pixbuf/pixbufscale.h:
Add these files I forgot earlier
2004-05-15 Jan Schmidt <thaytan@mad.scientist.com>
* ext/gdk_pixbuf/Makefile.am:
* ext/gdk_pixbuf/gstgdkpixbuf.c: (plugin_init):

463
ext/gdk_pixbuf/pixbufscale.c Normal file
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@ -0,0 +1,463 @@
/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* Copyright (C) <2004> Jan Schmidt <thaytan@mad.scientist.com>
*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <pixbufscale.h>
#include <gst/video/video.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
/* debug variable definition */
GST_DEBUG_CATEGORY (pixbufscale_debug);
#define GST_CAT_DEFAULT pixbufscale_debug
/* elementfactory information */
static GstElementDetails pixbufscale_details =
GST_ELEMENT_DETAILS ("Gdk Pixbuf scaler",
"Filter/Effect/Video",
"Resizes video",
"Jan Schmidt <thaytan@mad.scientist.com>\nWim Taymans <wim.taymans@chello.be>");
/* GstPixbufScale signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
ARG_0,
ARG_METHOD,
/* FILL ME */
};
static GstStaticPadTemplate gst_pixbufscale_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_RGB)
);
static GstStaticPadTemplate gst_pixbufscale_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_RGB)
);
#define GST_TYPE_PIXBUFSCALE_METHOD (gst_pixbufscale_method_get_type())
static GType
gst_pixbufscale_method_get_type (void)
{
static GType pixbufscale_method_type = 0;
static GEnumValue pixbufscale_methods[] = {
{GST_PIXBUFSCALE_NEAREST, "0", "Nearest Neighbour"},
{GST_PIXBUFSCALE_TILES, "1", "Tiles"},
{GST_PIXBUFSCALE_BILINEAR, "2", "Bilinear"},
{GST_PIXBUFSCALE_HYPER, "3", "Hyper"},
{0, NULL, NULL},
};
if (!pixbufscale_method_type) {
pixbufscale_method_type =
g_enum_register_static ("GstPixbufScaleMethod", pixbufscale_methods);
}
return pixbufscale_method_type;
}
static void gst_pixbufscale_base_init (gpointer g_class);
static void gst_pixbufscale_class_init (GstPixbufScaleClass * klass);
static void gst_pixbufscale_init (GstPixbufScale * pixbufscale);
static gboolean gst_pixbufscale_handle_src_event (GstPad * pad,
GstEvent * event);
static void gst_pixbufscale_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_pixbufscale_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_pixbufscale_chain (GstPad * pad, GstData * _data);
static GstElementClass *parent_class = NULL;
GType
gst_pixbufscale_get_type (void)
{
static GType pixbufscale_type = 0;
if (!pixbufscale_type) {
static const GTypeInfo pixbufscale_info = {
sizeof (GstPixbufScaleClass),
gst_pixbufscale_base_init,
NULL,
(GClassInitFunc) gst_pixbufscale_class_init,
NULL,
NULL,
sizeof (GstPixbufScale),
0,
(GInstanceInitFunc) gst_pixbufscale_init,
};
pixbufscale_type =
g_type_register_static (GST_TYPE_ELEMENT, "GstPixbufScale",
&pixbufscale_info, 0);
}
return pixbufscale_type;
}
static void
gst_pixbufscale_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_set_details (element_class, &pixbufscale_details);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_pixbufscale_src_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_pixbufscale_sink_template));
}
static void
gst_pixbufscale_class_init (GstPixbufScaleClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_METHOD,
g_param_spec_enum ("method", "method", "method",
GST_TYPE_PIXBUFSCALE_METHOD, GST_PIXBUFSCALE_BILINEAR,
G_PARAM_READWRITE));
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
gobject_class->set_property = gst_pixbufscale_set_property;
gobject_class->get_property = gst_pixbufscale_get_property;
}
static GstCaps *
gst_pixbufscale_getcaps (GstPad * pad)
{
GstPixbufScale *pixbufscale;
GstCaps *othercaps;
GstCaps *caps;
GstPad *otherpad;
int i;
pixbufscale = GST_PIXBUFSCALE (gst_pad_get_parent (pad));
otherpad = (pad == pixbufscale->srcpad) ? pixbufscale->sinkpad :
pixbufscale->srcpad;
othercaps = gst_pad_get_allowed_caps (otherpad);
caps = gst_caps_copy (othercaps);
for (i = 0; i < gst_caps_get_size (caps); i++) {
GstStructure *structure = gst_caps_get_structure (caps, i);
gst_structure_set (structure,
"width", GST_TYPE_INT_RANGE, 16, G_MAXINT,
"height", GST_TYPE_INT_RANGE, 16, G_MAXINT, NULL);
}
GST_DEBUG ("getcaps are: %" GST_PTR_FORMAT, caps);
return caps;
}
static GstPadLinkReturn
gst_pixbufscale_link (GstPad * pad, const GstCaps * caps)
{
GstPixbufScale *pixbufscale;
GstPadLinkReturn ret;
GstPad *otherpad;
GstStructure *structure;
int height, width;
GST_DEBUG ("gst_pixbufscale_link %s\n", gst_caps_to_string (caps));
pixbufscale = GST_PIXBUFSCALE (gst_pad_get_parent (pad));
otherpad = (pad == pixbufscale->srcpad) ? pixbufscale->sinkpad :
pixbufscale->srcpad;
structure = gst_caps_get_structure (caps, 0);
ret = gst_structure_get_int (structure, "width", &width);
ret &= gst_structure_get_int (structure, "height", &height);
ret = gst_pad_try_set_caps (otherpad, caps);
if (ret == GST_PAD_LINK_OK) {
/* cool, we can use passthru */
pixbufscale->to_width = width;
pixbufscale->to_height = height;
pixbufscale->from_width = width;
pixbufscale->from_height = height;
pixbufscale->from_buf_size = width * height * 3;
pixbufscale->to_buf_size = width * height * 3;
pixbufscale->inited = TRUE;
return GST_PAD_LINK_OK;
}
if (gst_pad_is_negotiated (otherpad)) {
GstCaps *newcaps = gst_caps_copy (caps);
if (pad == pixbufscale->srcpad) {
gst_caps_set_simple (newcaps,
"width", G_TYPE_INT, pixbufscale->from_width,
"height", G_TYPE_INT, pixbufscale->from_height, NULL);
} else {
gst_caps_set_simple (newcaps,
"width", G_TYPE_INT, pixbufscale->to_width,
"height", G_TYPE_INT, pixbufscale->to_height, NULL);
}
ret = gst_pad_try_set_caps (otherpad, newcaps);
if (GST_PAD_LINK_FAILED (ret)) {
return GST_PAD_LINK_REFUSED;
}
}
pixbufscale->passthru = FALSE;
if (pad == pixbufscale->srcpad) {
pixbufscale->to_width = width;
pixbufscale->to_height = height;
} else {
pixbufscale->from_width = width;
pixbufscale->from_height = height;
}
if (gst_pad_is_negotiated (otherpad)) {
pixbufscale->from_buf_size = pixbufscale->from_width *
pixbufscale->from_height * 3;
pixbufscale->to_buf_size = pixbufscale->to_width *
pixbufscale->to_height * 3;
pixbufscale->inited = TRUE;
}
return GST_PAD_LINK_OK;
}
static void
gst_pixbufscale_init (GstPixbufScale * pixbufscale)
{
GST_DEBUG_OBJECT (pixbufscale, "_init");
pixbufscale->sinkpad =
gst_pad_new_from_template (gst_static_pad_template_get
(&gst_pixbufscale_sink_template), "sink");
gst_element_add_pad (GST_ELEMENT (pixbufscale), pixbufscale->sinkpad);
gst_pad_set_chain_function (pixbufscale->sinkpad, gst_pixbufscale_chain);
gst_pad_set_link_function (pixbufscale->sinkpad, gst_pixbufscale_link);
gst_pad_set_getcaps_function (pixbufscale->sinkpad, gst_pixbufscale_getcaps);
pixbufscale->srcpad =
gst_pad_new_from_template (gst_static_pad_template_get
(&gst_pixbufscale_src_template), "src");
gst_element_add_pad (GST_ELEMENT (pixbufscale), pixbufscale->srcpad);
gst_pad_set_event_function (pixbufscale->srcpad,
gst_pixbufscale_handle_src_event);
gst_pad_set_link_function (pixbufscale->srcpad, gst_pixbufscale_link);
gst_pad_set_getcaps_function (pixbufscale->srcpad, gst_pixbufscale_getcaps);
pixbufscale->inited = FALSE;
pixbufscale->method = GST_PIXBUFSCALE_TILES;
pixbufscale->gdk_method = GDK_INTERP_TILES;
}
static gboolean
gst_pixbufscale_handle_src_event (GstPad * pad, GstEvent * event)
{
GstPixbufScale *pixbufscale;
double a;
GstStructure *structure;
GstEvent *new_event;
pixbufscale = GST_PIXBUFSCALE (gst_pad_get_parent (pad));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_NAVIGATION:
structure = gst_structure_copy (event->event_data.structure.structure);
if (gst_structure_get_double (event->event_data.structure.structure,
"pointer_x", &a)) {
gst_structure_set (structure, "pointer_x", G_TYPE_DOUBLE,
a * pixbufscale->from_width / pixbufscale->to_width, NULL);
}
if (gst_structure_get_double (event->event_data.structure.structure,
"pointer_y", &a)) {
gst_structure_set (structure, "pointer_y", G_TYPE_DOUBLE,
a * pixbufscale->from_height / pixbufscale->to_height, NULL);
}
gst_event_unref (event);
new_event = gst_event_new (GST_EVENT_NAVIGATION);
new_event->event_data.structure.structure = structure;
return gst_pad_event_default (pad, new_event);
break;
default:
return gst_pad_event_default (pad, event);
break;
}
}
static void
pixbufscale_scale (GstPixbufScale * scale, unsigned char *dest,
unsigned char *src)
{
GdkPixbuf *src_pixbuf, *dest_pixbuf;
src_pixbuf = gdk_pixbuf_new_from_data
(src, GDK_COLORSPACE_RGB, FALSE,
8, scale->from_width, scale->from_height,
3 * scale->from_width, NULL, NULL);
dest_pixbuf = gdk_pixbuf_new_from_data
(dest, GDK_COLORSPACE_RGB, FALSE,
8, scale->to_width, scale->to_height, 3 * scale->to_width, NULL, NULL);
gdk_pixbuf_scale (src_pixbuf, dest_pixbuf, 0, 0, scale->to_width,
scale->to_height, 0, 0,
(double) scale->to_width / scale->from_width,
(double) scale->to_height / scale->from_height, scale->gdk_method);
dest_pixbuf = gdk_pixbuf_scale_simple
(src_pixbuf, scale->to_width, scale->to_height, scale->gdk_method);
g_object_unref (src_pixbuf);
g_object_unref (dest_pixbuf);
}
static void
gst_pixbufscale_chain (GstPad * pad, GstData * _data)
{
GstBuffer *buf = GST_BUFFER (_data);
GstPixbufScale *pixbufscale;
guchar *data;
gulong size;
GstBuffer *outbuf;
g_return_if_fail (pad != NULL);
g_return_if_fail (GST_IS_PAD (pad));
g_return_if_fail (buf != NULL);
pixbufscale = GST_PIXBUFSCALE (gst_pad_get_parent (pad));
g_return_if_fail (pixbufscale->inited);
data = GST_BUFFER_DATA (buf);
size = GST_BUFFER_SIZE (buf);
if (pixbufscale->passthru) {
GST_LOG_OBJECT (pixbufscale, "passing through buffer of %ld bytes in '%s'",
size, GST_OBJECT_NAME (pixbufscale));
gst_pad_push (pixbufscale->srcpad, GST_DATA (buf));
return;
}
GST_LOG_OBJECT (pixbufscale, "got buffer of %ld bytes in '%s'", size,
GST_OBJECT_NAME (pixbufscale));
GST_LOG_OBJECT (pixbufscale,
"size=%ld from=%dx%d to=%dx%d fromsize=%ld (should be %d) tosize=%d",
size, pixbufscale->from_width, pixbufscale->from_height,
pixbufscale->to_width, pixbufscale->to_height, size,
pixbufscale->from_buf_size, pixbufscale->to_buf_size);
g_return_if_fail (size == pixbufscale->from_buf_size);
outbuf = gst_pad_alloc_buffer (pixbufscale->srcpad,
GST_BUFFER_OFFSET_NONE, pixbufscale->to_buf_size);
GST_BUFFER_TIMESTAMP (outbuf) = GST_BUFFER_TIMESTAMP (buf);
pixbufscale_scale (pixbufscale, GST_BUFFER_DATA (outbuf), data);
GST_DEBUG_OBJECT (pixbufscale, "pushing buffer of %d bytes in '%s'",
GST_BUFFER_SIZE (outbuf), GST_OBJECT_NAME (pixbufscale));
gst_pad_push (pixbufscale->srcpad, GST_DATA (outbuf));
gst_buffer_unref (buf);
}
static void
gst_pixbufscale_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstPixbufScale *src;
g_return_if_fail (GST_IS_PIXBUFSCALE (object));
src = GST_PIXBUFSCALE (object);
switch (prop_id) {
case ARG_METHOD:
src->method = g_value_get_enum (value);
switch (src->method) {
case GST_PIXBUFSCALE_NEAREST:
src->gdk_method = GDK_INTERP_NEAREST;
break;
case GST_PIXBUFSCALE_TILES:
src->gdk_method = GDK_INTERP_TILES;
break;
case GST_PIXBUFSCALE_BILINEAR:
src->gdk_method = GDK_INTERP_BILINEAR;
break;
case GST_PIXBUFSCALE_HYPER:
src->gdk_method = GDK_INTERP_HYPER;
break;
}
break;
default:
break;
}
}
static void
gst_pixbufscale_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstPixbufScale *src;
g_return_if_fail (GST_IS_PIXBUFSCALE (object));
src = GST_PIXBUFSCALE (object);
switch (prop_id) {
case ARG_METHOD:
g_value_set_enum (value, src->method);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
gboolean
pixbufscale_init (GstPlugin * plugin)
{
if (!gst_element_register (plugin, "pixbufscale", GST_RANK_NONE,
GST_TYPE_PIXBUFSCALE))
return FALSE;
GST_DEBUG_CATEGORY_INIT (pixbufscale_debug, "pixbufscale", 0,
"pixbufscale element");
return TRUE;
}

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ext/gdk_pixbuf/pixbufscale.h Normal file
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/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* Copyright (C) <2004> Jan Schmidt <thaytan@mad.scientist.com>
*
* 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_PIXBUFSCALE_H__
#define __GST_PIXBUFSCALE_H__
#include <gtk/gtk.h>
#include <gst/gst.h>
G_BEGIN_DECLS
typedef enum {
GST_PIXBUFSCALE_NEAREST,
GST_PIXBUFSCALE_TILES,
GST_PIXBUFSCALE_BILINEAR,
GST_PIXBUFSCALE_HYPER
} GstPixbufScaleMethod;
#define GST_TYPE_PIXBUFSCALE \
(gst_pixbufscale_get_type())
#define GST_PIXBUFSCALE(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_PIXBUFSCALE,GstPixbufScale))
#define GST_PIXBUFSCALE_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_PIXBUFSCALE,GstPixbufScale))
#define GST_IS_PIXBUFSCALE(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_PIXBUFSCALE))
#define GST_IS_PIXBUFSCALE_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_PIXBUFSCALE))
typedef struct _GstPixbufScale GstPixbufScale;
typedef struct _GstPixbufScaleClass GstPixbufScaleClass;
struct _GstPixbufScale {
GstElement element;
GstPad *sinkpad,*srcpad;
/* video state */
gboolean inited;
gint to_width;
gint to_height;
gint from_width;
gint from_height;
gboolean passthru;
GstPixbufScaleMethod method;
GdkInterpType gdk_method;
/* private */
gint from_buf_size;
gint to_buf_size;
};
struct _GstPixbufScaleClass {
GstElementClass parent_class;
};
static GType gst_pixbufscale_get_type(void);
G_END_DECLS
#endif /* __GST_PIXBUFSCALE_H__ */