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/* GStreamer
* Copyright (C) 2013 FIXME <fixme@example.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., 51 Franklin Street, Suite 500,
* Boston, MA 02110-1335, USA.
*/
/**
* SECTION:element-gstvideodiff
*
* The videodiff element does FIXME stuff.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch -v fakesrc ! videodiff ! FIXME ! fakesink
* ]|
* FIXME Describe what the pipeline does.
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <gst/video/video.h>
#include <gst/video/gstvideofilter.h>
#include "gstvideodiff.h"
GST_DEBUG_CATEGORY_STATIC (gst_video_diff_debug_category);
#define GST_CAT_DEFAULT gst_video_diff_debug_category
/* prototypes */
static GstFlowReturn gst_video_diff_transform_frame (GstVideoFilter * filter,
GstVideoFrame * inframe, GstVideoFrame * outframe);
enum
{
PROP_0
};
/* pad templates */
/* FIXME: add/remove formats you can handle */
#define VIDEO_SRC_CAPS \
GST_VIDEO_CAPS_MAKE("{ I420, Y444, Y42B, UYVY, RGBA }")
/* FIXME: add/remove formats you can handle */
#define VIDEO_SINK_CAPS \
GST_VIDEO_CAPS_MAKE("{ I420, Y444, Y42B, UYVY, RGBA }")
/* class initialization */
G_DEFINE_TYPE_WITH_CODE (GstVideoDiff, gst_video_diff, GST_TYPE_VIDEO_FILTER,
GST_DEBUG_CATEGORY_INIT (gst_video_diff_debug_category, "videodiff", 0,
"debug category for videodiff element"));
static void
gst_video_diff_class_init (GstVideoDiffClass * klass)
{
GstVideoFilterClass *video_filter_class = GST_VIDEO_FILTER_CLASS (klass);
/* Setting up pads and setting metadata should be moved to
base_class_init if you intend to subclass this class. */
gst_element_class_add_pad_template (GST_ELEMENT_CLASS (klass),
gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
gst_caps_from_string (VIDEO_SRC_CAPS)));
gst_element_class_add_pad_template (GST_ELEMENT_CLASS (klass),
gst_pad_template_new ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
gst_caps_from_string (VIDEO_SINK_CAPS)));
gst_element_class_set_static_metadata (GST_ELEMENT_CLASS (klass),
"FIXME Long name", "Generic", "FIXME Description",
"FIXME <fixme@example.com>");
video_filter_class->transform_frame =
GST_DEBUG_FUNCPTR (gst_video_diff_transform_frame);
}
static void
gst_video_diff_init (GstVideoDiff * videodiff)
{
videodiff->threshold = 10;
}
static GstFlowReturn
gst_video_diff_transform_frame_ip_planarY (GstVideoDiff * videodiff,
GstVideoFrame * outframe, GstVideoFrame * inframe, GstVideoFrame * oldframe)
{
int width = inframe->info.width;
int height = inframe->info.height;
int i, j;
int threshold = videodiff->threshold;
int t = videodiff->t;
for (j = 0; j < height; j++) {
guint8 *d = (guint8 *) outframe->data[0] + outframe->info.stride[0] * j;
guint8 *s1 = (guint8 *) oldframe->data[0] + oldframe->info.stride[0] * j;
guint8 *s2 = (guint8 *) inframe->data[0] + inframe->info.stride[0] * j;
for (i = 0; i < width; i++) {
if ((s2[i] < s1[i] - threshold) || (s2[i] > s1[i] + threshold)) {
if ((i + j + t) & 0x4) {
d[i] = 16;
} else {
d[i] = 240;
}
} else {
d[i] = s2[i];
}
}
}
for (j = 0; j < GST_VIDEO_FRAME_COMP_HEIGHT (inframe, 1); j++) {
guint8 *d = (guint8 *) outframe->data[1] + outframe->info.stride[1] * j;
guint8 *s = (guint8 *) inframe->data[1] + inframe->info.stride[1] * j;
memcpy (d, s, GST_VIDEO_FRAME_COMP_WIDTH (inframe, 1));
}
for (j = 0; j < GST_VIDEO_FRAME_COMP_HEIGHT (inframe, 2); j++) {
guint8 *d = (guint8 *) outframe->data[2] + outframe->info.stride[2] * j;
guint8 *s = (guint8 *) inframe->data[2] + inframe->info.stride[2] * j;
memcpy (d, s, GST_VIDEO_FRAME_COMP_WIDTH (inframe, 2));
}
return GST_FLOW_OK;
}
static GstFlowReturn
gst_video_diff_transform_frame (GstVideoFilter * filter,
GstVideoFrame * inframe, GstVideoFrame * outframe)
{
GstVideoDiff *videodiff = GST_VIDEO_DIFF (filter);
GST_DEBUG_OBJECT (videodiff, "transform_frame_ip");
if (videodiff->previous_buffer) {
GstVideoFrame oldframe;
gst_video_frame_map (&oldframe, &videodiff->oldinfo,
videodiff->previous_buffer, GST_MAP_READ);
switch (inframe->info.finfo->format) {
case GST_VIDEO_FORMAT_I420:
case GST_VIDEO_FORMAT_Y41B:
case GST_VIDEO_FORMAT_Y444:
case GST_VIDEO_FORMAT_Y42B:
gst_video_diff_transform_frame_ip_planarY (videodiff, outframe,
inframe, &oldframe);
break;
default:
g_assert_not_reached ();
}
gst_video_frame_unmap (&oldframe);
gst_buffer_unref (videodiff->previous_buffer);
} else {
int k;
int j;
for (k = 0; k < 3; k++) {
for (j = 0; j < GST_VIDEO_FRAME_COMP_HEIGHT (inframe, k); j++) {
guint8 *d = (guint8 *) outframe->data[k] + outframe->info.stride[k] * j;
guint8 *s = (guint8 *) inframe->data[k] + inframe->info.stride[k] * j;
memcpy (d, s, GST_VIDEO_FRAME_COMP_WIDTH (inframe, k));
}
}
}
videodiff->previous_buffer = gst_buffer_ref (inframe->buffer);
memcpy (&videodiff->oldinfo, &inframe->info, sizeof (GstVideoInfo));
return GST_FLOW_OK;
}
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