gstreamer/gst/videoscale/gstvideoscale.c

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/* Gnome-Streamer
* 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.
*/
/*#define DEBUG_ENABLED */
#include <gstvideoscale.h>
/* elementfactory information */
static GstElementDetails videoscale_details = {
"Video scaler",
"Filter/Video/Scaler",
"Resizes video",
VERSION,
"Wim Taymans <wim.taymans@chello.be>",
"(C) 2000",
};
/* GstVideoscale signals and args */
enum {
/* FILL ME */
LAST_SIGNAL
};
enum {
ARG_0,
ARG_WIDTH,
ARG_HEIGHT,
ARG_METHOD,
/* FILL ME */
};
GST_PADTEMPLATE_FACTORY (sink_templ,
"sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_CAPS_NEW (
"videoscale_caps",
"video/raw",
"format", GST_PROPS_FOURCC (GST_MAKE_FOURCC ('I','4','2','0'))
)
)
GST_PADTEMPLATE_FACTORY (src_templ,
"src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_CAPS_NEW (
"videoscale_caps",
"video/raw",
"format", GST_PROPS_FOURCC (GST_MAKE_FOURCC ('I','4','2','0'))
)
)
#define GST_TYPE_VIDEOSCALE_METHOD (gst_videoscale_method_get_type())
static GType
gst_videoscale_method_get_type (void)
{
static GType videoscale_method_type = 0;
static GEnumValue videoscale_methods[] = {
{ GST_VIDEOSCALE_POINT_SAMPLE, "0", "Point Sample" },
{ GST_VIDEOSCALE_NEAREST, "1", "Nearest" },
{ GST_VIDEOSCALE_BILINEAR, "2", "Bilinear" },
{ GST_VIDEOSCALE_BICUBIC, "3", "Bicubic" },
{ 0, NULL, NULL },
};
if (!videoscale_method_type) {
videoscale_method_type = g_enum_register_static ("GstVideoscaleMethod", videoscale_methods);
}
return videoscale_method_type;
}
static void gst_videoscale_class_init (GstVideoscaleClass *klass);
static void gst_videoscale_init (GstVideoscale *videoscale);
static void gst_videoscale_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec);
static void gst_videoscale_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);
static void gst_videoscale_chain (GstPad *pad, GstBuffer *buf);
static GstElementClass *parent_class = NULL;
/*static guint gst_videoscale_signals[LAST_SIGNAL] = { 0 }; */
GType
gst_videoscale_get_type (void)
{
static GType videoscale_type = 0;
if (!videoscale_type) {
static const GTypeInfo videoscale_info = {
sizeof(GstVideoscaleClass), NULL,
NULL,
(GClassInitFunc)gst_videoscale_class_init,
NULL,
NULL,
sizeof(GstVideoscale),
0,
(GInstanceInitFunc)gst_videoscale_init,
};
videoscale_type = g_type_register_static(GST_TYPE_ELEMENT, "GstVideoscale", &videoscale_info, 0);
}
return videoscale_type;
}
static void
gst_videoscale_class_init (GstVideoscaleClass *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_WIDTH,
g_param_spec_int("width","width","width",
G_MININT,G_MAXINT,0,G_PARAM_READWRITE)); /* CHECKME */
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_HEIGHT,
g_param_spec_int("height","height","height",
G_MININT,G_MAXINT,0,G_PARAM_READWRITE)); /* CHECKME */
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_METHOD,
g_param_spec_enum("method","method","method",
GST_TYPE_VIDEOSCALE_METHOD,0,G_PARAM_READWRITE)); /* CHECKME! */
parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
gobject_class->set_property = gst_videoscale_set_property;
gobject_class->get_property = gst_videoscale_get_property;
}
/*
static GstPadNegotiateReturn
videoscale_negotiate_src (GstPad *pad, GstCaps **caps, gpointer *data)
{
GstVideoscale *videoscale = GST_VIDEOSCALE (gst_pad_get_parent (pad));
GST_DEBUG(0,"videoscale_negotiate_src\n");
if(*caps==NULL){
return GST_PAD_NEGOTIATE_FAIL;
}
*caps = GST_CAPS_NEW ( "videoscale_caps",
"video/raw",
"format", GST_PROPS_FOURCC (videoscale->format),
"width", GST_PROPS_INT (videoscale->targetwidth),
"height", GST_PROPS_INT (videoscale->targetheight)
);
return GST_PAD_NEGOTIATE_AGREE;
}
static GstPadNegotiateReturn
videoscale_negotiate_sink (GstPad *pad, GstCaps **caps, gpointer *data)
{
GST_DEBUG(0,"videoscale_negotiate_sink\n");
if (*caps==NULL)
return GST_PAD_NEGOTIATE_FAIL;
return GST_PAD_NEGOTIATE_AGREE;
}
*/
static GstPadConnectReturn
gst_videoscale_sinkconnect (GstPad *pad, GstCaps *caps)
{
GstVideoscale *videoscale;
GST_DEBUG(0,"gst_videoscale_sinkconnect\n");
videoscale = GST_VIDEOSCALE (gst_pad_get_parent (pad));
if (!GST_CAPS_IS_FIXED (caps)) {
return GST_PAD_CONNECT_DELAYED;
}
videoscale->width = gst_caps_get_int (caps, "width");
videoscale->height = gst_caps_get_int (caps, "height");
videoscale->format = gst_caps_get_int (caps, "format");
gst_videoscale_setup(videoscale);
GST_DEBUG (0,"target size %d x %d\n",videoscale->targetwidth,
videoscale->targetheight);
GST_DEBUG(0,"width %d\n",videoscale->targetwidth);
gst_pad_try_set_caps (videoscale->srcpad,
GST_CAPS_NEW (
"videoscale_src",
"video/raw",
"format", GST_PROPS_FOURCC (videoscale->format),
"width", GST_PROPS_INT (videoscale->targetwidth),
"height", GST_PROPS_INT (videoscale->targetheight)
));
return GST_PAD_CONNECT_OK;
}
static void
gst_videoscale_init (GstVideoscale *videoscale)
{
GST_DEBUG(0,"gst_videoscale_init\n");
videoscale->sinkpad = gst_pad_new_from_template (
GST_PADTEMPLATE_GET (sink_templ), "sink");
/*gst_pad_set_negotiate_function(videoscale->sinkpad,videoscale_negotiate_sink); */
gst_element_add_pad(GST_ELEMENT(videoscale),videoscale->sinkpad);
gst_pad_set_chain_function(videoscale->sinkpad,gst_videoscale_chain);
gst_pad_set_connect_function(videoscale->sinkpad,gst_videoscale_sinkconnect);
videoscale->srcpad = gst_pad_new_from_template (
GST_PADTEMPLATE_GET (src_templ), "src");
/*gst_pad_set_negotiate_function(videoscale->srcpad,videoscale_negotiate_src); */
gst_element_add_pad(GST_ELEMENT(videoscale),videoscale->srcpad);
videoscale->targetwidth = -1;
videoscale->targetheight = -1;
videoscale->method = GST_VIDEOSCALE_NEAREST;
/*videoscale->method = GST_VIDEOSCALE_BILINEAR; */
/*videoscale->method = GST_VIDEOSCALE_POINT_SAMPLE; */
}
static void
gst_videoscale_chain (GstPad *pad, GstBuffer *buf)
{
GstVideoscale *videoscale;
guchar *data;
gulong size;
GstBuffer *outbuf;
GST_DEBUG (0,"gst_videoscale_chain\n");
g_return_if_fail (pad != NULL);
g_return_if_fail (GST_IS_PAD (pad));
g_return_if_fail (buf != NULL);
videoscale = GST_VIDEOSCALE (gst_pad_get_parent (pad));
data = GST_BUFFER_DATA(buf);
size = GST_BUFFER_SIZE(buf);
if(!videoscale->scale_cc){
videoscale->format = gst_caps_get_int (gst_pad_get_caps(pad), "format");
gst_videoscale_setup(videoscale);
}
GST_DEBUG (0,"gst_videoscale_chain: got buffer of %ld bytes in '%s'\n",size,
GST_OBJECT_NAME (videoscale));
GST_DEBUG(0,"size=%ld from=%dx%d to=%dx%d newsize=%d\n",
size,
videoscale->width, videoscale->height,
videoscale->targetwidth, videoscale->targetheight,
videoscale->targetwidth*videoscale->targetheight + videoscale->targetwidth*videoscale->targetheight/2);
outbuf = gst_buffer_new();
/* XXX this is wrong for anything but I420 */
GST_BUFFER_SIZE(outbuf) = videoscale->targetwidth*videoscale->targetheight +
videoscale->targetwidth*videoscale->targetheight/2;
GST_BUFFER_DATA(outbuf) = g_malloc (videoscale->targetwidth*videoscale->targetheight*2);
GST_BUFFER_TIMESTAMP(outbuf) = GST_BUFFER_TIMESTAMP(buf);
/*g_return_if_fail(videoscale->scale_cc != NULL); */
videoscale->scale_cc(videoscale, data, GST_BUFFER_DATA(outbuf));
GST_DEBUG (0,"gst_videoscale_chain: pushing buffer of %d bytes in '%s'\n",GST_BUFFER_SIZE(outbuf),
GST_OBJECT_NAME (videoscale));
gst_pad_push(videoscale->srcpad, outbuf);
gst_buffer_unref(buf);
}
static void
gst_videoscale_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
{
GstVideoscale *src;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail(GST_IS_VIDEOSCALE(object));
src = GST_VIDEOSCALE(object);
GST_DEBUG(0,"gst_videoscale_set_property\n");
switch (prop_id) {
case ARG_WIDTH:
src->targetwidth = g_value_get_int (value);
break;
case ARG_HEIGHT:
src->targetheight = g_value_get_int (value);
break;
case ARG_METHOD:
src->method = g_value_get_int (value);
break;
default:
break;
}
}
static void
gst_videoscale_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
{
GstVideoscale *src;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail(GST_IS_VIDEOSCALE(object));
src = GST_VIDEOSCALE(object);
switch (prop_id) {
case ARG_WIDTH:
g_value_set_int (value, src->targetwidth);
break;
case ARG_HEIGHT:
g_value_set_int (value, src->targetheight);
break;
case ARG_METHOD:
g_value_set_int (value, src->method);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
plugin_init (GModule *module, GstPlugin *plugin)
{
GstElementFactory *factory;
/* create an elementfactory for the videoscale element */
factory = gst_elementfactory_new("videoscale",GST_TYPE_VIDEOSCALE,
&videoscale_details);
g_return_val_if_fail(factory != NULL, FALSE);
gst_elementfactory_add_padtemplate (factory, GST_PADTEMPLATE_GET (sink_templ));
gst_elementfactory_add_padtemplate (factory, GST_PADTEMPLATE_GET (src_templ));
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
return TRUE;
}
GstPluginDesc plugin_desc = {
GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"videoscale",
plugin_init
};