3 * Copyright (C) <2010-2012> 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 GST_DEBUG_CATEGORY_STATIC (gst_solarize_debug);
71 #define GST_CAT_DEFAULT gst_solarize_debug
73 #if G_BYTE_ORDER == G_LITTLE_ENDIAN
74 #define CAPS_STR GST_VIDEO_CAPS_MAKE ("{ BGRx, RGBx }")
76 #define CAPS_STR GST_VIDEO_CAPS_MAKE ("{ xBGR, xRGB }")
79 /* Filter signals and args. */
96 #define DEFAULT_THRESHOLD 127
97 #define DEFAULT_START 50
98 #define DEFAULT_END 185
100 static gint gate_int (gint value, gint min, gint max);
101 static void transform (guint32 * src, guint32 * dest, gint video_area,
102 gint threshold, gint start, gint end);
104 /* The capabilities of the inputs and outputs. */
106 static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
109 GST_STATIC_CAPS (CAPS_STR)
112 static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
115 GST_STATIC_CAPS (CAPS_STR)
118 G_DEFINE_TYPE (GstSolarize, gst_solarize, GST_TYPE_VIDEO_FILTER);
120 static void gst_solarize_set_property (GObject * object, guint prop_id,
121 const GValue * value, GParamSpec * pspec);
122 static void gst_solarize_get_property (GObject * object, guint prop_id,
123 GValue * value, GParamSpec * pspec);
125 static gboolean gst_solarize_set_caps (GstBaseTransform * btrans,
126 GstCaps * incaps, GstCaps * outcaps);
127 static GstFlowReturn gst_solarize_transform (GstBaseTransform * btrans,
128 GstBuffer * in_buf, GstBuffer * out_buf);
130 /* GObject vmethod implementations */
132 /* Initialize the solarize's class. */
134 gst_solarize_class_init (GstSolarizeClass * klass)
136 GObjectClass *gobject_class = (GObjectClass *) klass;
137 GstElementClass *gstelement_class = (GstElementClass *) klass;
138 GstBaseTransformClass *trans_class = (GstBaseTransformClass *) klass;
140 gst_element_class_set_details_simple (gstelement_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 (gstelement_class,
147 gst_static_pad_template_get (&src_factory));
148 gst_element_class_add_pad_template (gstelement_class,
149 gst_static_pad_template_get (&sink_factory));
151 gobject_class->set_property = gst_solarize_set_property;
152 gobject_class->get_property = gst_solarize_get_property;
154 g_object_class_install_property (gobject_class, PROP_THRESHOLD,
155 g_param_spec_uint ("threshold", "Threshold",
156 "Threshold parameter", 0, 256, DEFAULT_THRESHOLD,
157 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE));
159 g_object_class_install_property (gobject_class, PROP_START,
160 g_param_spec_uint ("start", "Start",
161 "Start parameter", 0, 256, DEFAULT_START,
162 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE));
164 g_object_class_install_property (gobject_class, PROP_END,
165 g_param_spec_uint ("end", "End",
166 "End parameter", 0, 256, DEFAULT_END,
167 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE));
169 g_object_class_install_property (gobject_class, PROP_SILENT,
170 g_param_spec_boolean ("silent", "Silent", "Produce verbose output ?",
171 FALSE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
173 trans_class->set_caps = GST_DEBUG_FUNCPTR (gst_solarize_set_caps);
174 trans_class->transform = GST_DEBUG_FUNCPTR (gst_solarize_transform);
177 /* Initialize the element,
178 * instantiate pads and add them to element,
179 * set pad calback functions, and
180 * initialize instance structure.
183 gst_solarize_init (GstSolarize * filter)
185 filter->threshold = DEFAULT_THRESHOLD;
186 filter->start = DEFAULT_START;
187 filter->end = DEFAULT_END;
188 filter->silent = FALSE;
192 gst_solarize_set_property (GObject * object, guint prop_id,
193 const GValue * value, GParamSpec * pspec)
195 GstSolarize *filter = GST_SOLARIZE (object);
199 filter->silent = g_value_get_boolean (value);
202 filter->threshold = g_value_get_uint (value);
205 filter->start = g_value_get_uint (value);
208 filter->end = g_value_get_uint (value);
211 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
217 gst_solarize_get_property (GObject * object, guint prop_id,
218 GValue * value, GParamSpec * pspec)
220 GstSolarize *filter = GST_SOLARIZE (object);
222 GST_OBJECT_LOCK (filter);
225 g_value_set_boolean (value, filter->silent);
228 g_value_set_uint (value, filter->threshold);
231 g_value_set_uint (value, filter->start);
234 g_value_set_uint (value, filter->end);
237 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
240 GST_OBJECT_UNLOCK (filter);
243 /* GstElement vmethod implementations */
245 /* Handle the link with other elements. */
247 gst_solarize_set_caps (GstBaseTransform * btrans, GstCaps * incaps,
250 GstSolarize *solarize = GST_SOLARIZE (btrans);
253 if (!gst_video_info_from_caps (&info, incaps))
256 solarize->info = info;
258 solarize->width = GST_VIDEO_INFO_WIDTH (&info);
259 solarize->height = GST_VIDEO_INFO_HEIGHT (&info);
266 GST_DEBUG_OBJECT (btrans, "could not parse caps");
271 /* Actual processing. */
273 gst_solarize_transform (GstBaseTransform * btrans,
274 GstBuffer * in_buf, GstBuffer * out_buf)
276 GstSolarize *filter = GST_SOLARIZE (btrans);
277 gint video_size, threshold, start, end;
279 GstClockTime timestamp;
281 GstVideoFrame in_frame, out_frame;
283 gst_video_frame_map (&in_frame, &filter->info, in_buf, GST_MAP_READ);
284 gst_video_frame_map (&out_frame, &filter->info, out_buf, GST_MAP_WRITE);
286 src = GST_VIDEO_FRAME_PLANE_DATA (&in_frame, 0);
287 dest = GST_VIDEO_FRAME_PLANE_DATA (&out_frame, 0);
289 /* GstController: update the properties */
290 timestamp = GST_BUFFER_TIMESTAMP (in_buf);
292 gst_segment_to_stream_time (&btrans->segment, GST_FORMAT_TIME, timestamp);
294 GST_DEBUG_OBJECT (filter, "sync to %" GST_TIME_FORMAT,
295 GST_TIME_ARGS (timestamp));
297 if (GST_CLOCK_TIME_IS_VALID (stream_time))
298 gst_object_sync_values (GST_OBJECT (filter), stream_time);
300 GST_OBJECT_LOCK (filter);
301 threshold = filter->threshold;
302 start = filter->start;
304 GST_OBJECT_UNLOCK (filter);
306 video_size = filter->width * filter->height;
307 transform (src, dest, video_size, threshold, start, end);
312 /* Entry point to initialize the plug-in.
313 * Register the element factories and other features. */
315 gst_solarize_plugin_init (GstPlugin * solarize)
317 /* debug category for fltering log messages */
318 GST_DEBUG_CATEGORY_INIT (gst_solarize_debug, "solarize",
319 0, "Template solarize");
321 return gst_element_register (solarize, "solarize", GST_RANK_NONE,
325 /*** Now the image processing work.... ***/
326 /* Keep the values inbounds. */
328 gate_int (gint value, gint min, gint max)
332 } else if (value > max) {
339 /* Transform processes each frame. */
341 transform (guint32 * src, guint32 * dest, gint video_area,
342 gint threshold, gint start, gint end)
350 gint period, up_length, down_length, height_scale, param;
352 period = end - start;
357 up_length = threshold - start;
358 if (up_length == 0) {
362 down_length = end - threshold;
363 if (down_length == 0) {
367 height_scale = ceiling - floor;
369 /* Loop through pixels. */
370 for (x = 0; x < video_area; x++) {
373 color[0] = (in >> 16) & 0xff;
374 color[1] = (in >> 8) & 0xff;
375 color[2] = (in) & 0xff;
378 /* Loop through colors. */
379 for (c = 0; c < 3; c++) {
385 if (param < up_length) {
386 color[c] = param * height_scale;
387 color[c] /= up_length;
390 color[c] = down_length - (param - up_length);
391 color[c] *= height_scale;
392 color[c] /= down_length;
397 color[0] = gate_int (color[0], 0, 255);
398 color[1] = gate_int (color[1], 0, 255);
399 color[2] = gate_int (color[2], 0, 255);
401 *dest++ = (color[0] << 16) | (color[1] << 8) | color[2];