gstreamer/gst/videosignal/gstvideomark.c

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/* GStreamer
* Copyright (C) <2007> Wim Taymans <wim@fluendo.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.
*/
/**
* SECTION:element-videomark
* @see_also: #GstVideoDetect
*
* This plugin produces #GstVideoMark::pattern-count squares in the bottom left
* corner of the video frames. The squares have a width and height of
* respectively #GstVideoMark:pattern-width and #GstVideoMark:pattern-height.
* Even squares will be black and odd squares will be white.
*
* After writing the pattern, #GstVideoMark:pattern-data-count squares after the
* pattern squares are produced as the bitarray given in
* #GstVideoMark:pattern-data. 1 bits will produce white squares and 0 bits will
* produce black squares.
*
* The element can be enabled with the #GstVideoMark:enabled property. It is
* mostly used together with the #GstVideoDetect plugin.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch videotestsrc ! videomark ! ximagesink
* ]| Add the default black/white squares at the bottom left of the video frames.
* </refsect2>
*
* Last reviewed on 2007-06-01 (0.10.6)
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstvideomark.h"
#include <string.h>
#include <math.h>
#include <gst/video/video.h>
/* GstVideoMark signals and args */
#define DEFAULT_PATTERN_WIDTH 4
#define DEFAULT_PATTERN_HEIGHT 16
#define DEFAULT_PATTERN_COUNT 4
#define DEFAULT_PATTERN_DATA_COUNT 5
#define DEFAULT_PATTERN_DATA 10
#define DEFAULT_ENABLED TRUE
#define DEFAULT_LEFT_OFFSET 0
#define DEFAULT_BOTTOM_OFFSET 0
enum
{
PROP_0,
PROP_PATTERN_WIDTH,
PROP_PATTERN_HEIGHT,
PROP_PATTERN_COUNT,
PROP_PATTERN_DATA_COUNT,
PROP_PATTERN_DATA,
PROP_ENABLED,
PROP_LEFT_OFFSET,
PROP_BOTTOM_OFFSET
};
GST_DEBUG_CATEGORY_STATIC (video_mark_debug);
#define GST_CAT_DEFAULT video_mark_debug
static const GstElementDetails video_mark_details =
GST_ELEMENT_DETAILS ("Video marker",
"Filter/Effect/Video",
"Marks a video signal with a pattern",
"Wim Taymans <wim@fluendo.com>");
static GstStaticPadTemplate gst_video_mark_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("{ I420, YV12 }"))
);
static GstStaticPadTemplate gst_video_mark_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("{ I420, YV12 }"))
);
static GstVideoFilterClass *parent_class = NULL;
static gboolean
gst_video_mark_set_caps (GstBaseTransform * btrans, GstCaps * incaps,
GstCaps * outcaps)
{
GstVideoMark *vf;
GstStructure *in_s;
gboolean ret;
vf = GST_VIDEO_MARK (btrans);
in_s = gst_caps_get_structure (incaps, 0);
ret = gst_structure_get_int (in_s, "width", &vf->width);
ret &= gst_structure_get_int (in_s, "height", &vf->height);
ret &= gst_structure_get_fourcc (in_s, "format", &vf->format);
return ret;
}
/* 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 void
gst_video_mark_draw_box (GstVideoMark * videomark, guint8 * data,
gint width, gint height, gint stride, guint8 color)
{
gint i, j;
for (i = 0; i < height; i++) {
for (j = 0; j < width; j++) {
data[j] = color;
}
/* move to next line */
data += stride;
}
}
static void
gst_video_mark_420 (GstVideoMark * videomark, GstBuffer * buffer)
{
gint i, pw, ph, stride, width, height;
guint8 *d, *data;
guint pattern_shift;
guint8 color;
data = GST_BUFFER_DATA (buffer);
width = videomark->width;
height = videomark->height;
pw = videomark->pattern_width;
ph = videomark->pattern_height;
stride = GST_VIDEO_I420_Y_ROWSTRIDE (width);
/* draw the bottom left pixels */
for (i = 0; i < videomark->pattern_count; i++) {
d = data;
/* move to start of bottom left */
d += stride * (height - ph - videomark->bottom_offset) +
videomark->left_offset;
/* move to i-th pattern */
d += pw * i;
if (i & 1)
/* odd pixels must be white */
color = 255;
else
color = 0;
/* draw box of width * height */
gst_video_mark_draw_box (videomark, d, pw, ph, stride, color);
}
pattern_shift = 1 << (videomark->pattern_data_count - 1);
/* get the data of the pattern */
for (i = 0; i < videomark->pattern_data_count; i++) {
d = data;
/* move to start of bottom left, adjust for offsets */
d += stride * (height - ph - videomark->bottom_offset) +
videomark->left_offset;
/* move after the fixed pattern */
d += (videomark->pattern_count * pw);
/* move to i-th pattern data */
d += pw * i;
if (videomark->pattern_data & pattern_shift)
color = 255;
else
color = 0;
gst_video_mark_draw_box (videomark, d, pw, ph, stride, color);
pattern_shift >>= 1;
}
}
static GstFlowReturn
gst_video_mark_transform_ip (GstBaseTransform * trans, GstBuffer * buf)
{
GstVideoMark *videomark;
GstFlowReturn ret = GST_FLOW_OK;
videomark = GST_VIDEO_MARK (trans);
if (videomark->enabled)
gst_video_mark_420 (videomark, buf);
return ret;
}
static void
gst_video_mark_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstVideoMark *videomark;
videomark = GST_VIDEO_MARK (object);
switch (prop_id) {
case PROP_PATTERN_WIDTH:
videomark->pattern_width = g_value_get_int (value);
break;
case PROP_PATTERN_HEIGHT:
videomark->pattern_height = g_value_get_int (value);
break;
case PROP_PATTERN_COUNT:
videomark->pattern_count = g_value_get_int (value);
break;
case PROP_PATTERN_DATA_COUNT:
videomark->pattern_data_count = g_value_get_int (value);
break;
case PROP_PATTERN_DATA:
videomark->pattern_data = g_value_get_int (value);
break;
case PROP_ENABLED:
videomark->enabled = g_value_get_boolean (value);
break;
case PROP_LEFT_OFFSET:
videomark->left_offset = g_value_get_int (value);
break;
case PROP_BOTTOM_OFFSET:
videomark->bottom_offset = g_value_get_int (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_video_mark_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstVideoMark *videomark;
videomark = GST_VIDEO_MARK (object);
switch (prop_id) {
case PROP_PATTERN_WIDTH:
g_value_set_int (value, videomark->pattern_width);
break;
case PROP_PATTERN_HEIGHT:
g_value_set_int (value, videomark->pattern_height);
break;
case PROP_PATTERN_COUNT:
g_value_set_int (value, videomark->pattern_count);
break;
case PROP_PATTERN_DATA_COUNT:
g_value_set_int (value, videomark->pattern_data_count);
break;
case PROP_PATTERN_DATA:
g_value_set_int (value, videomark->pattern_data);
break;
case PROP_ENABLED:
g_value_set_boolean (value, videomark->enabled);
break;
case PROP_LEFT_OFFSET:
g_value_set_int (value, videomark->left_offset);
break;
case PROP_BOTTOM_OFFSET:
g_value_set_int (value, videomark->bottom_offset);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_video_mark_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_set_details (element_class, &video_mark_details);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_video_mark_sink_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_video_mark_src_template));
}
static void
gst_video_mark_class_init (gpointer klass, gpointer class_data)
{
GObjectClass *gobject_class;
GstBaseTransformClass *trans_class;
gobject_class = (GObjectClass *) klass;
trans_class = (GstBaseTransformClass *) klass;
parent_class = g_type_class_peek_parent (klass);
gobject_class->set_property = gst_video_mark_set_property;
gobject_class->get_property = gst_video_mark_get_property;
g_object_class_install_property (gobject_class, PROP_PATTERN_WIDTH,
g_param_spec_int ("pattern-width", "Pattern width",
"The width of the pattern markers", 1, G_MAXINT,
DEFAULT_PATTERN_WIDTH, G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
g_object_class_install_property (gobject_class, PROP_PATTERN_HEIGHT,
g_param_spec_int ("pattern-height", "Pattern height",
"The height of the pattern markers", 1, G_MAXINT,
DEFAULT_PATTERN_HEIGHT, G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
g_object_class_install_property (gobject_class, PROP_PATTERN_COUNT,
g_param_spec_int ("pattern-count", "Pattern count",
"The number of pattern markers", 1, G_MAXINT,
DEFAULT_PATTERN_COUNT, G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
g_object_class_install_property (gobject_class, PROP_PATTERN_DATA_COUNT,
g_param_spec_int ("pattern-data-count", "Pattern data count",
"The number of extra data pattern markers", 0, G_MAXINT,
DEFAULT_PATTERN_DATA_COUNT, G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
g_object_class_install_property (gobject_class, PROP_PATTERN_DATA,
g_param_spec_int ("pattern-data", "Pattern data",
"The extra data pattern markers", 0, G_MAXINT,
DEFAULT_PATTERN_DATA, G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
g_object_class_install_property (gobject_class, PROP_ENABLED,
g_param_spec_boolean ("enabled", "Enabled",
"Enable or disable the filter",
DEFAULT_ENABLED, G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
g_object_class_install_property (gobject_class, PROP_LEFT_OFFSET,
g_param_spec_int ("left-offset", "Left Offset",
"The offset from the left border where the pattern starts", 0,
G_MAXINT, DEFAULT_LEFT_OFFSET,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
g_object_class_install_property (gobject_class, PROP_BOTTOM_OFFSET,
g_param_spec_int ("bottom-offset", "Bottom Offset",
"The offset from the bottom border where the pattern starts", 0,
G_MAXINT, DEFAULT_BOTTOM_OFFSET,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
trans_class->set_caps = GST_DEBUG_FUNCPTR (gst_video_mark_set_caps);
trans_class->transform_ip = GST_DEBUG_FUNCPTR (gst_video_mark_transform_ip);
GST_DEBUG_CATEGORY_INIT (video_mark_debug, "videomark", 0, "Video mark");
}
static void
gst_video_mark_init (GTypeInstance * instance, gpointer g_class)
{
GstVideoMark *videomark;
videomark = GST_VIDEO_MARK (instance);
GST_DEBUG_OBJECT (videomark, "gst_video_mark_init");
}
GType
gst_video_mark_get_type (void)
{
static GType video_mark_type = 0;
if (!video_mark_type) {
static const GTypeInfo video_mark_info = {
sizeof (GstVideoMarkClass),
gst_video_mark_base_init,
NULL,
gst_video_mark_class_init,
NULL,
NULL,
sizeof (GstVideoMark),
0,
gst_video_mark_init,
};
video_mark_type = g_type_register_static (GST_TYPE_VIDEO_FILTER,
"GstVideoMark", &video_mark_info, 0);
}
return video_mark_type;
}