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>
72 GST_DEBUG_CATEGORY_STATIC (gst_solarize_debug);
73 #define GST_CAT_DEFAULT gst_solarize_debug
75 #if G_BYTE_ORDER == G_LITTLE_ENDIAN
76 #define CAPS_STR GST_VIDEO_CAPS_BGRx ";" GST_VIDEO_CAPS_RGBx
78 #define CAPS_STR GST_VIDEO_CAPS_xRGB ";" GST_VIDEO_CAPS_xBGR
81 /* Filter signals and args. */
98 #define DEFAULT_THRESHOLD 127
99 #define DEFAULT_START 50
100 #define DEFAULT_END 185
102 static gint gate_int (gint value, gint min, gint max);
103 static void transform (guint32 * src, guint32 * dest, gint video_area,
104 gint threshold, gint start, gint end);
106 /* The capabilities of the inputs and outputs. */
108 static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
111 GST_STATIC_CAPS (CAPS_STR)
114 static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
117 GST_STATIC_CAPS (CAPS_STR)
120 GST_BOILERPLATE (GstSolarize, gst_solarize, GstVideoFilter,
121 GST_TYPE_VIDEO_FILTER);
123 static void gst_solarize_set_property (GObject * object, guint prop_id,
124 const GValue * value, GParamSpec * pspec);
125 static void gst_solarize_get_property (GObject * object, guint prop_id,
126 GValue * value, GParamSpec * pspec);
128 static gboolean gst_solarize_set_caps (GstBaseTransform * btrans,
129 GstCaps * incaps, GstCaps * outcaps);
130 static GstFlowReturn gst_solarize_transform (GstBaseTransform * btrans,
131 GstBuffer * in_buf, GstBuffer * out_buf);
133 /* GObject vmethod implementations */
136 gst_solarize_base_init (gpointer gclass)
138 GstElementClass *element_class = GST_ELEMENT_CLASS (gclass);
140 gst_element_class_set_details_simple (element_class,
142 "Filter/Effect/Video",
143 "Solarize tunable inverse in the video signal.",
144 "Luis de Bethencourt <luis@debethencourt.com>");
146 gst_element_class_add_pad_template (element_class,
147 gst_static_pad_template_get (&src_factory));
148 gst_element_class_add_pad_template (element_class,
149 gst_static_pad_template_get (&sink_factory));
152 /* Initialize the solarize's class. */
154 gst_solarize_class_init (GstSolarizeClass * klass)
156 GObjectClass *gobject_class = (GObjectClass *) klass;
157 GstBaseTransformClass *trans_class = (GstBaseTransformClass *) klass;
159 gobject_class->set_property = gst_solarize_set_property;
160 gobject_class->get_property = gst_solarize_get_property;
162 g_object_class_install_property (gobject_class, PROP_THRESHOLD,
163 g_param_spec_uint ("threshold", "Threshold",
164 "Threshold parameter", 0, 256, DEFAULT_THRESHOLD,
165 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE));
167 g_object_class_install_property (gobject_class, PROP_START,
168 g_param_spec_uint ("start", "Start",
169 "Start parameter", 0, 256, DEFAULT_START,
170 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE));
172 g_object_class_install_property (gobject_class, PROP_END,
173 g_param_spec_uint ("end", "End",
174 "End parameter", 0, 256, DEFAULT_END,
175 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE));
177 g_object_class_install_property (gobject_class, PROP_SILENT,
178 g_param_spec_boolean ("silent", "Silent", "Produce verbose output ?",
179 FALSE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
181 trans_class->set_caps = GST_DEBUG_FUNCPTR (gst_solarize_set_caps);
182 trans_class->transform = GST_DEBUG_FUNCPTR (gst_solarize_transform);
185 /* Initialize the element,
186 * instantiate pads and add them to element,
187 * set pad calback functions, and
188 * initialize instance structure.
191 gst_solarize_init (GstSolarize * filter, GstSolarizeClass * gclass)
193 filter->threshold = DEFAULT_THRESHOLD;
194 filter->start = DEFAULT_START;
195 filter->end = DEFAULT_END;
196 filter->silent = FALSE;
200 gst_solarize_set_property (GObject * object, guint prop_id,
201 const GValue * value, GParamSpec * pspec)
203 GstSolarize *filter = GST_SOLARIZE (object);
207 filter->silent = g_value_get_boolean (value);
210 filter->threshold = g_value_get_uint (value);
213 filter->start = g_value_get_uint (value);
216 filter->end = g_value_get_uint (value);
219 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
225 gst_solarize_get_property (GObject * object, guint prop_id,
226 GValue * value, GParamSpec * pspec)
228 GstSolarize *filter = GST_SOLARIZE (object);
230 GST_OBJECT_LOCK (filter);
233 g_value_set_boolean (value, filter->silent);
236 g_value_set_uint (value, filter->threshold);
239 g_value_set_uint (value, filter->start);
242 g_value_set_uint (value, filter->end);
245 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
248 GST_OBJECT_UNLOCK (filter);
251 /* GstElement vmethod implementations */
253 /* Handle the link with other elements. */
255 gst_solarize_set_caps (GstBaseTransform * btrans, GstCaps * incaps,
258 GstSolarize *filter = GST_SOLARIZE (btrans);
259 GstStructure *structure;
260 gboolean ret = FALSE;
262 GST_OBJECT_LOCK (filter);
263 structure = gst_caps_get_structure (incaps, 0);
264 if (gst_structure_get_int (structure, "width", &filter->width) &&
265 gst_structure_get_int (structure, "height", &filter->height)) {
268 GST_OBJECT_UNLOCK (filter);
273 /* Actual processing. */
275 gst_solarize_transform (GstBaseTransform * btrans,
276 GstBuffer * in_buf, GstBuffer * out_buf)
278 GstSolarize *filter = GST_SOLARIZE (btrans);
279 gint video_size, threshold, start, end;
280 guint32 *src = (guint32 *) GST_BUFFER_DATA (in_buf);
281 guint32 *dest = (guint32 *) GST_BUFFER_DATA (out_buf);
282 GstClockTime timestamp;
285 /* GstController: update the properties */
286 timestamp = GST_BUFFER_TIMESTAMP (in_buf);
288 gst_segment_to_stream_time (&btrans->segment, GST_FORMAT_TIME, timestamp);
290 GST_DEBUG_OBJECT (filter, "sync to %" GST_TIME_FORMAT,
291 GST_TIME_ARGS (timestamp));
293 if (GST_CLOCK_TIME_IS_VALID (stream_time))
294 gst_object_sync_values (GST_OBJECT (filter), stream_time);
296 GST_OBJECT_LOCK (filter);
297 threshold = filter->threshold;
298 start = filter->start;
300 GST_OBJECT_UNLOCK (filter);
302 video_size = filter->width * filter->height;
303 transform (src, dest, video_size, threshold, start, end);
308 /* Entry point to initialize the plug-in.
309 * Register the element factories and other features. */
311 gst_solarize_plugin_init (GstPlugin * solarize)
313 /* debug category for fltering log messages */
314 GST_DEBUG_CATEGORY_INIT (gst_solarize_debug, "solarize",
315 0, "Template solarize");
317 return gst_element_register (solarize, "solarize", GST_RANK_NONE,
321 /*** Now the image processing work.... ***/
322 /* Keep the values inbounds. */
324 gate_int (gint value, gint min, gint max)
328 } else if (value > max) {
335 /* Transform processes each frame. */
337 transform (guint32 * src, guint32 * dest, gint video_area,
338 gint threshold, gint start, gint end)
346 gint period, up_length, down_length, height_scale, param;
348 period = end - start;
353 up_length = threshold - start;
354 if (up_length == 0) {
358 down_length = end - threshold;
359 if (down_length == 0) {
363 height_scale = ceiling - floor;
365 /* Loop through pixels. */
366 for (x = 0; x < video_area; x++) {
369 color[0] = (in >> 16) & 0xff;
370 color[1] = (in >> 8) & 0xff;
371 color[2] = (in) & 0xff;
374 /* Loop through colors. */
375 for (c = 0; c < 3; c++) {
381 if (param < up_length) {
382 color[c] = param * height_scale;
383 color[c] /= up_length;
386 color[c] = down_length - (param - up_length);
387 color[c] *= height_scale;
388 color[c] /= down_length;
393 color[0] = gate_int (color[0], 0, 255);
394 color[1] = gate_int (color[1], 0, 255);
395 color[2] = gate_int (color[2], 0, 255);
397 *dest++ = (color[0] << 16) | (color[1] << 8) | color[2];