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/*
* This plugin provides some filter controls (for GUI code debugging).
* It does nothing else, video frames just passed through as-is.
*
* You can have a look at the invert filter for sample code which
* actually does some image processing.
*
* (c) 2002 Gerd Knorr <kraxel@bytesex.org>
*
*/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
#include "grab-ng.h"
/* ------------------------------------------------------------------- */
static void *init(struct ng_video_fmt *out)
{
/* don't have to carry around status info */
static int dummy;
return &dummy;
}
static struct ng_video_buf*
frame(void *handle, struct ng_video_buf *in)
{
/* do nothing -- just return the frame as-is */
return in;
}
static void fini(void *handle)
{
/* nothing to clean up */
}
/* ------------------------------------------------------------------- */
static int vals[3] = { 32, 1, 2 };
static int read_attr(struct ng_attribute *attr)
{
return vals[attr->id];
}
static void write_attr(struct ng_attribute *attr, int value)
{
fprintf(stderr,PLUGNAME ": %s: %d\n", attr->name, value);
vals[attr->id] = value;
}
/* ------------------------------------------------------------------- */
static struct STRTAB items[] = {
{ 1, "entry 1" },
{ 2, "entry 2" },
{ 3, "entry 3" },
{ -1, NULL },
};
static struct ng_attribute attrs[] = {
{
id: 0,
name: "scale (integer)",
type: ATTR_TYPE_INTEGER,
min: 0,
max: 100,
read: read_attr,
write: write_attr,
},{
id: 1,
name: "yes/no (boolean)",
type: ATTR_TYPE_BOOL,
read: read_attr,
write: write_attr,
},{
id: 2,
name: "menu (choice)",
type: ATTR_TYPE_CHOICE,
choices: items,
read: read_attr,
write: write_attr,
},{
/* end of list */
}
};
static struct ng_filter filter = {
name: "gui debug",
attrs: attrs,
fmts:
(1 << VIDEO_RGB08) |
(1 << VIDEO_GRAY) |
(1 << VIDEO_RGB15_LE) |
(1 << VIDEO_RGB16_LE) |
(1 << VIDEO_RGB15_BE) |
(1 << VIDEO_RGB16_BE) |
(1 << VIDEO_BGR24) |
(1 << VIDEO_BGR32) |
(1 << VIDEO_RGB24) |
(1 << VIDEO_RGB32) |
(1 << VIDEO_YUV422) |
(1 << VIDEO_YUV422P) |
(1 << VIDEO_YUV420P),
init: init,
frame: frame,
fini: fini,
};
extern void ng_plugin_init(void);
void ng_plugin_init(void)
{
ng_filter_register(NG_PLUGIN_MAGIC,PLUGNAME,&filter);
}
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