gstreamer/gst/debugutils/gstnavigationtest.c

357 lines
11 KiB
C

/* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstnavigationtest.h"
#include <string.h>
#include <math.h>
#include <gst/video/video.h>
#ifdef _MSC_VER
#define rint(x) (floor((x)+0.5))
#endif
GST_DEBUG_CATEGORY_STATIC (navigationtest_debug);
#define GST_CAT_DEFAULT navigationtest_debug
static const GstElementDetails navigationtest_details =
GST_ELEMENT_DETAILS ("Video navigation test",
"Filter/Effect/Video",
"Handle navigation events showing a black square following mouse pointer",
"David Schleef <ds@schleef.org>");
static GstStaticPadTemplate gst_navigationtest_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("I420"))
);
static GstStaticPadTemplate gst_navigationtest_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("I420"))
);
static GstVideoFilterClass *parent_class = NULL;
static gboolean
gst_navigationtest_handle_src_event (GstPad * pad, GstEvent * event)
{
GstNavigationtest *navtest;
const gchar *type;
navtest = GST_NAVIGATIONTEST (GST_PAD_PARENT (pad));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_NAVIGATION:
{
const GstStructure *s = gst_event_get_structure (event);
gint fps_n, fps_d;
fps_n = gst_value_get_fraction_numerator ((&navtest->framerate));
fps_d = gst_value_get_fraction_denominator ((&navtest->framerate));
type = gst_structure_get_string (s, "event");
if (g_str_equal (type, "mouse-move")) {
gst_structure_get_double (s, "pointer_x", &navtest->x);
gst_structure_get_double (s, "pointer_y", &navtest->y);
} else if (g_str_equal (type, "mouse-button-press")) {
ButtonClick *click = g_new (ButtonClick, 1);
gst_structure_get_double (s, "pointer_x", &click->x);
gst_structure_get_double (s, "pointer_y", &click->y);
click->images_left = (fps_n + fps_d - 1) / fps_d;
/* green */
click->cy = 150;
click->cu = 46;
click->cv = 21;
navtest->clicks = g_slist_prepend (navtest->clicks, click);
} else if (g_str_equal (type, "mouse-button-release")) {
ButtonClick *click = g_new (ButtonClick, 1);
gst_structure_get_double (s, "pointer_x", &click->x);
gst_structure_get_double (s, "pointer_y", &click->y);
click->images_left = (fps_n + fps_d - 1) / fps_d;
/* red */
click->cy = 76;
click->cu = 85;
click->cv = 255;
navtest->clicks = g_slist_prepend (navtest->clicks, click);
}
break;
}
default:
break;
}
return gst_pad_event_default (pad, event);
}
/* Useful macros */
#define GST_VIDEO_I420_Y_ROWSTRIDE(width) (GST_ROUND_UP_4(width))
#define GST_VIDEO_I420_U_ROWSTRIDE(width) (GST_ROUND_UP_8(width)/2)
#define GST_VIDEO_I420_V_ROWSTRIDE(width) ((GST_ROUND_UP_8(GST_VIDEO_I420_Y_ROWSTRIDE(width)))/2)
#define GST_VIDEO_I420_Y_OFFSET(w,h) (0)
#define GST_VIDEO_I420_U_OFFSET(w,h) (GST_VIDEO_I420_Y_OFFSET(w,h)+(GST_VIDEO_I420_Y_ROWSTRIDE(w)*GST_ROUND_UP_2(h)))
#define GST_VIDEO_I420_V_OFFSET(w,h) (GST_VIDEO_I420_U_OFFSET(w,h)+(GST_VIDEO_I420_U_ROWSTRIDE(w)*GST_ROUND_UP_2(h)/2))
#define GST_VIDEO_I420_SIZE(w,h) (GST_VIDEO_I420_V_OFFSET(w,h)+(GST_VIDEO_I420_V_ROWSTRIDE(w)*GST_ROUND_UP_2(h)/2))
static gboolean
gst_navigationtest_get_unit_size (GstBaseTransform * btrans, GstCaps * caps,
guint * size)
{
GstNavigationtest *navtest;
GstStructure *structure;
gboolean ret = FALSE;
gint width, height;
navtest = GST_NAVIGATIONTEST (btrans);
structure = gst_caps_get_structure (caps, 0);
if (gst_structure_get_int (structure, "width", &width) &&
gst_structure_get_int (structure, "height", &height)) {
*size = GST_VIDEO_I420_SIZE (width, height);
ret = TRUE;
GST_DEBUG_OBJECT (navtest, "our frame size is %d bytes (%dx%d)", *size,
width, height);
}
return ret;
}
static gboolean
gst_navigationtest_set_caps (GstBaseTransform * btrans, GstCaps * incaps,
GstCaps * outcaps)
{
GstNavigationtest *navtest = GST_NAVIGATIONTEST (btrans);
gboolean ret = FALSE;
GstStructure *structure;
structure = gst_caps_get_structure (incaps, 0);
if (gst_structure_get_int (structure, "width", &navtest->width) &&
gst_structure_get_int (structure, "height", &navtest->height)) {
const GValue *framerate;
framerate = gst_structure_get_value (structure, "framerate");
if (framerate && GST_VALUE_HOLDS_FRACTION (framerate)) {
g_value_copy (framerate, &navtest->framerate);
ret = TRUE;
}
}
return ret;
}
static void
draw_box_planar411 (guint8 * dest, int width, int height, int x, int y,
guint8 colory, guint8 coloru, guint8 colorv)
{
int x1, x2, y1, y2;
guint8 *d = dest;
if (x < 0 || y < 0 || x >= width || y >= height)
return;
x1 = MAX (x - 5, 0);
x2 = MIN (x + 5, width);
y1 = MAX (y - 5, 0);
y2 = MIN (y + 5, height);
for (y = y1; y < y2; y++) {
for (x = x1; x < x2; x++) {
((guint8 *) d)[y * GST_VIDEO_I420_Y_ROWSTRIDE (width) + x] = colory;
}
}
d = dest + GST_VIDEO_I420_U_OFFSET (width, height);
x1 /= 2;
x2 /= 2;
y1 /= 2;
y2 /= 2;
for (y = y1; y < y2; y++) {
for (x = x1; x < x2; x++) {
((guint8 *) d)[y * GST_VIDEO_I420_U_ROWSTRIDE (width) + x] = coloru;
}
}
d = dest + GST_VIDEO_I420_V_OFFSET (width, height);
for (y = y1; y < y2; y++) {
for (x = x1; x < x2; x++) {
((guint8 *) d)[y * GST_VIDEO_I420_V_ROWSTRIDE (width) + x] = colorv;
}
}
}
static GstFlowReturn
gst_navigationtest_transform (GstBaseTransform * trans, GstBuffer * in,
GstBuffer * out)
{
GstNavigationtest *navtest = GST_NAVIGATIONTEST (trans);
GSList *walk;
GstFlowReturn ret = GST_FLOW_OK;
/* do something interesting here. This simply copies the source
* to the destination. */
gst_buffer_copy_metadata (out, in, GST_BUFFER_COPY_TIMESTAMPS);
memcpy (GST_BUFFER_DATA (out), GST_BUFFER_DATA (in),
MIN (GST_BUFFER_SIZE (in), GST_BUFFER_SIZE (out)));
walk = navtest->clicks;
while (walk) {
ButtonClick *click = walk->data;
walk = g_slist_next (walk);
draw_box_planar411 (GST_BUFFER_DATA (out), navtest->width, navtest->height,
rint (click->x), rint (click->y), click->cy, click->cu, click->cv);
if (--click->images_left < 1) {
navtest->clicks = g_slist_remove (navtest->clicks, click);
g_free (click);
}
}
draw_box_planar411 (GST_BUFFER_DATA (out), navtest->width, navtest->height,
rint (navtest->x), rint (navtest->y), 0, 128, 128);
return ret;
}
static GstStateChangeReturn
gst_navigationtest_change_state (GstElement * element,
GstStateChange transition)
{
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
GstNavigationtest *navtest = GST_NAVIGATIONTEST (element);
if (GST_ELEMENT_CLASS (parent_class)->change_state)
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
/* downwards state changes */
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
{
g_slist_foreach (navtest->clicks, (GFunc) g_free, NULL);
g_slist_free (navtest->clicks);
navtest->clicks = NULL;
break;
}
default:
break;
}
return ret;
}
static void
gst_navigationtest_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_set_details (element_class, &navigationtest_details);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_navigationtest_sink_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_navigationtest_src_template));
}
static void
gst_navigationtest_class_init (gpointer klass, gpointer class_data)
{
GObjectClass *gobject_class;
GstElementClass *element_class;
GstBaseTransformClass *trans_class;
gobject_class = (GObjectClass *) klass;
element_class = (GstElementClass *) klass;
trans_class = (GstBaseTransformClass *) klass;
parent_class = g_type_class_peek_parent (klass);
element_class->change_state =
GST_DEBUG_FUNCPTR (gst_navigationtest_change_state);
trans_class->set_caps = GST_DEBUG_FUNCPTR (gst_navigationtest_set_caps);
trans_class->get_unit_size =
GST_DEBUG_FUNCPTR (gst_navigationtest_get_unit_size);
trans_class->transform = GST_DEBUG_FUNCPTR (gst_navigationtest_transform);
}
static void
gst_navigationtest_init (GTypeInstance * instance, gpointer g_class)
{
GstNavigationtest *navtest = GST_NAVIGATIONTEST (instance);
GstBaseTransform *btrans = GST_BASE_TRANSFORM (instance);
gst_pad_set_event_function (btrans->srcpad,
GST_DEBUG_FUNCPTR (gst_navigationtest_handle_src_event));
navtest->x = -1;
navtest->y = -1;
g_value_init (&navtest->framerate, GST_TYPE_FRACTION);
}
GType
gst_navigationtest_get_type (void)
{
static GType navigationtest_type = 0;
if (!navigationtest_type) {
static const GTypeInfo navigationtest_info = {
sizeof (GstNavigationtestClass),
gst_navigationtest_base_init,
NULL,
gst_navigationtest_class_init,
NULL,
NULL,
sizeof (GstNavigationtest),
0,
gst_navigationtest_init,
};
navigationtest_type = g_type_register_static (GST_TYPE_VIDEO_FILTER,
"GstNavigationtest", &navigationtest_info, 0);
}
return navigationtest_type;
}
static gboolean
plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (navigationtest_debug, "navigationtest", 0,
"navigationtest");
return gst_element_register (plugin, "navigationtest", GST_RANK_NONE,
GST_TYPE_NAVIGATIONTEST);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"navigationtest",
"Template for a video filter",
plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)