3 * Copyright (C) 2010 Luis de Bethencourt <luis@debethencourt.com>
5 * Solarize - curve adjustment video effect.
6 * Based on Pete Warden's FreeFrame plugin with the same name.
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
15 * The above copyright notice and this permission notice shall be included in
16 * all copies or substantial portions of the Software.
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
21 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
23 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
24 * DEALINGS IN THE SOFTWARE.
26 * Alternatively, the contents of this file may be used under the
27 * GNU Lesser General Public License Version 2.1 (the "LGPL"), in
28 * which case the following provisions apply instead of the ones
31 * This library is free software; you can redistribute it and/or
32 * modify it under the terms of the GNU Library General Public
33 * License as published by the Free Software Foundation; either
34 * version 2 of the License, or (at your option) any later version.
36 * This library is distributed in the hope that it will be useful,
37 * but WITHOUT ANY WARRANTY; without even the implied warranty of
38 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
39 * Library General Public License for more details.
41 * You should have received a copy of the GNU Library General Public
42 * License along with this library; if not, write to the
43 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
44 * Boston, MA 02111-1307, USA.
48 * SECTION:element-solarize
50 * Solarize does a smart inverse in a video stream in realtime.
53 * <title>Example launch line</title>
55 * gst-launch -v videotestsrc ! solarize ! ffmpegcolorspace ! autovideosink
56 * ]| This pipeline shows the effect of solarize on a test stream
67 #include "gstplugin.h"
68 #include "gstsolarize.h"
70 #include <gst/video/video.h>
71 #include <gst/controller/gstcontroller.h>
73 GST_DEBUG_CATEGORY_STATIC (gst_solarize_debug);
74 #define GST_CAT_DEFAULT gst_solarize_debug
76 #if G_BYTE_ORDER == G_LITTLE_ENDIAN
77 #define CAPS_STR GST_VIDEO_CAPS_BGRx ";" GST_VIDEO_CAPS_RGBx
79 #define CAPS_STR GST_VIDEO_CAPS_xRGB ";" GST_VIDEO_CAPS_xBGR
82 /* Filter signals and args. */
99 #define DEFAULT_THRESHOLD 127
100 #define DEFAULT_START 50
101 #define DEFAULT_END 185
103 static gint gate_int (gint value, gint min, gint max);
104 static void transform (guint32 * src, guint32 * dest, gint video_area,
105 gint threshold, gint start, gint end);
107 /* The capabilities of the inputs and outputs. */
109 static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
112 GST_STATIC_CAPS (CAPS_STR)
115 static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
118 GST_STATIC_CAPS (CAPS_STR)
121 GST_BOILERPLATE (GstSolarize, gst_solarize, GstVideoFilter,
122 GST_TYPE_VIDEO_FILTER);
124 static void gst_solarize_set_property (GObject * object, guint prop_id,
125 const GValue * value, GParamSpec * pspec);
126 static void gst_solarize_get_property (GObject * object, guint prop_id,
127 GValue * value, GParamSpec * pspec);
129 static gboolean gst_solarize_set_caps (GstBaseTransform * btrans,
130 GstCaps * incaps, GstCaps * outcaps);
131 static GstFlowReturn gst_solarize_transform (GstBaseTransform * btrans,
132 GstBuffer * in_buf, GstBuffer * out_buf);
134 /* GObject vmethod implementations */
137 gst_solarize_base_init (gpointer gclass)
139 GstElementClass *element_class = GST_ELEMENT_CLASS (gclass);
141 gst_element_class_set_details_simple (element_class,
143 "Filter/Effect/Video",
144 "Solarize tunable inverse in the video signal.",
145 "Luis de Bethencourt <luis@debethencourt.com>");
147 gst_element_class_add_pad_template (element_class,
148 gst_static_pad_template_get (&src_factory));
149 gst_element_class_add_pad_template (element_class,
150 gst_static_pad_template_get (&sink_factory));
153 /* Initialize the solarize's class. */
155 gst_solarize_class_init (GstSolarizeClass * klass)
157 GObjectClass *gobject_class = (GObjectClass *) klass;
158 GstBaseTransformClass *trans_class = (GstBaseTransformClass *) klass;
160 gobject_class->set_property = gst_solarize_set_property;
161 gobject_class->get_property = gst_solarize_get_property;
163 g_object_class_install_property (gobject_class, PROP_THRESHOLD,
164 g_param_spec_uint ("threshold", "Threshold",
165 "Threshold parameter", 0, 256, DEFAULT_THRESHOLD,
166 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE));
168 g_object_class_install_property (gobject_class, PROP_START,
169 g_param_spec_uint ("start", "Start",
170 "Start parameter", 0, 256, DEFAULT_START,
171 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE));
173 g_object_class_install_property (gobject_class, PROP_END,
174 g_param_spec_uint ("end", "End",
175 "End parameter", 0, 256, DEFAULT_END,
176 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE));
178 g_object_class_install_property (gobject_class, PROP_SILENT,
179 g_param_spec_boolean ("silent", "Silent", "Produce verbose output ?",
180 FALSE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
182 trans_class->set_caps = GST_DEBUG_FUNCPTR (gst_solarize_set_caps);
183 trans_class->transform = GST_DEBUG_FUNCPTR (gst_solarize_transform);
186 /* Initialize the element,
187 * instantiate pads and add them to element,
188 * set pad calback functions, and
189 * initialize instance structure.
192 gst_solarize_init (GstSolarize * filter, GstSolarizeClass * gclass)
194 filter->threshold = DEFAULT_THRESHOLD;
195 filter->start = DEFAULT_START;
196 filter->end = DEFAULT_END;
197 filter->silent = FALSE;
201 gst_solarize_set_property (GObject * object, guint prop_id,
202 const GValue * value, GParamSpec * pspec)
204 GstSolarize *filter = GST_SOLARIZE (object);
208 filter->silent = g_value_get_boolean (value);
211 filter->threshold = g_value_get_uint (value);
214 filter->start = g_value_get_uint (value);
217 filter->end = g_value_get_uint (value);
220 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
226 gst_solarize_get_property (GObject * object, guint prop_id,
227 GValue * value, GParamSpec * pspec)
229 GstSolarize *filter = GST_SOLARIZE (object);
231 GST_OBJECT_LOCK (filter);
234 g_value_set_boolean (value, filter->silent);
237 g_value_set_uint (value, filter->threshold);
240 g_value_set_uint (value, filter->start);
243 g_value_set_uint (value, filter->end);
246 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
249 GST_OBJECT_UNLOCK (filter);
252 /* GstElement vmethod implementations */
254 /* Handle the link with other elements. */
256 gst_solarize_set_caps (GstBaseTransform * btrans, GstCaps * incaps,
259 GstSolarize *filter = GST_SOLARIZE (btrans);
260 GstStructure *structure;
261 gboolean ret = FALSE;
263 GST_OBJECT_LOCK (filter);
264 structure = gst_caps_get_structure (incaps, 0);
265 if (gst_structure_get_int (structure, "width", &filter->width) &&
266 gst_structure_get_int (structure, "height", &filter->height)) {
269 GST_OBJECT_UNLOCK (filter);
274 /* Actual processing. */
276 gst_solarize_transform (GstBaseTransform * btrans,
277 GstBuffer * in_buf, GstBuffer * out_buf)
279 GstSolarize *filter = GST_SOLARIZE (btrans);
280 gint video_size, threshold, start, end;
281 guint32 *src = (guint32 *) GST_BUFFER_DATA (in_buf);
282 guint32 *dest = (guint32 *) GST_BUFFER_DATA (out_buf);
283 GstClockTime timestamp;
286 /* GstController: update the properties */
287 timestamp = GST_BUFFER_TIMESTAMP (in_buf);
289 gst_segment_to_stream_time (&btrans->segment, GST_FORMAT_TIME, timestamp);
291 GST_DEBUG_OBJECT (filter, "sync to %" GST_TIME_FORMAT,
292 GST_TIME_ARGS (timestamp));
294 if (GST_CLOCK_TIME_IS_VALID (stream_time))
295 gst_object_sync_values (GST_OBJECT (filter), stream_time);
297 GST_OBJECT_LOCK (filter);
298 threshold = filter->threshold;
299 start = filter->start;
301 GST_OBJECT_UNLOCK (filter);
303 video_size = filter->width * filter->height;
304 transform (src, dest, video_size, threshold, start, end);
309 /* Entry point to initialize the plug-in.
310 * Register the element factories and other features. */
312 gst_solarize_plugin_init (GstPlugin * solarize)
314 /* debug category for fltering log messages */
315 GST_DEBUG_CATEGORY_INIT (gst_solarize_debug, "solarize",
316 0, "Template solarize");
318 return gst_element_register (solarize, "solarize", GST_RANK_NONE,
322 /*** Now the image processing work.... ***/
323 /* Keep the values inbounds. */
325 gate_int (gint value, gint min, gint max)
329 } else if (value > max) {
336 /* Transform processes each frame. */
338 transform (guint32 * src, guint32 * dest, gint video_area,
339 gint threshold, gint start, gint end)
347 gint period, up_length, down_length, height_scale, param;
349 period = end - start;
354 up_length = threshold - start;
355 if (up_length == 0) {
359 down_length = end - threshold;
360 if (down_length == 0) {
364 height_scale = ceiling - floor;
366 /* Loop through pixels. */
367 for (x = 0; x < video_area; x++) {
370 color[0] = (in >> 16) & 0xff;
371 color[1] = (in >> 8) & 0xff;
372 color[2] = (in) & 0xff;
375 /* Loop through colors. */
376 for (c = 0; c < 3; c++) {
382 if (param < up_length) {
383 color[c] = param * height_scale;
384 color[c] /= up_length;
387 color[c] = down_length - (param - up_length);
388 color[c] *= height_scale;
389 color[c] /= down_length;
394 color[0] = gate_int (color[0], 0, 255);
395 color[1] = gate_int (color[1], 0, 255);
396 color[2] = gate_int (color[2], 0, 255);
398 *dest++ = (color[0] << 16) | (color[1] << 8) | color[2];