2 * Copyright (C) 1999 Erik Walthinsen <omega@cse.ogi.edu>
3 * Copyright (C) 2007 Wim Taymans <wim.taymans@collabora.co.uk>
4 * Copyright (C) 2007 Edward Hervey <edward.hervey@collabora.co.uk>
5 * Copyright (C) 2007 Jan Schmidt <thaytan@noraisin.net>
6 * Copyright (C) 2010 Sebastian Dröge <sebastian.droege@collabora.co.uk>
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Library General Public License for more details.
18 * You should have received a copy of the GNU Library General Public
19 * License along with this library; if not, write to the
20 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
21 * Boston, MA 02110-1301, USA.
25 * SECTION:element-chromahold
28 * The chromahold element will remove all color information for
29 * all colors except a single one and converts them to grayscale.
33 * gst-launch-1.0 videotestsrc pattern=smpte75 ! \
34 * chromahold target-r=0 target-g=0 target-b=255 ! \
35 * videoconvert ! autovideosink \
36 * ]| This pipeline only keeps the red color.
43 #include "gstchromahold.h"
49 GST_DEBUG_CATEGORY_STATIC (gst_chroma_hold_debug);
50 #define GST_CAT_DEFAULT gst_chroma_hold_debug
52 #define DEFAULT_TARGET_R 255
53 #define DEFAULT_TARGET_G 0
54 #define DEFAULT_TARGET_B 0
55 #define DEFAULT_TOLERANCE 30
66 static GstStaticPadTemplate gst_chroma_hold_src_template =
67 GST_STATIC_PAD_TEMPLATE ("src",
70 GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE
71 ("{ ARGB, BGRA, ABGR, RGBA, xRGB, BGRx, xBGR, RGBx}"))
74 static GstStaticPadTemplate gst_chroma_hold_sink_template =
75 GST_STATIC_PAD_TEMPLATE ("sink",
78 GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE
79 ("{ ARGB, BGRA, ABGR, RGBA, xRGB, BGRx, xBGR, RGBx}"))
82 #define GST_CHROMA_HOLD_LOCK(self) G_STMT_START { \
83 GST_LOG_OBJECT (self, "Locking chromahold from thread %p", g_thread_self ()); \
84 g_mutex_lock (&self->lock); \
85 GST_LOG_OBJECT (self, "Locked chromahold from thread %p", g_thread_self ()); \
88 #define GST_CHROMA_HOLD_UNLOCK(self) G_STMT_START { \
89 GST_LOG_OBJECT (self, "Unlocking chromahold from thread %p", \
91 g_mutex_unlock (&self->lock); \
94 static gboolean gst_chroma_hold_start (GstBaseTransform * trans);
95 static gboolean gst_chroma_hold_set_info (GstVideoFilter * vfilter,
96 GstCaps * incaps, GstVideoInfo * in_info, GstCaps * outcaps,
97 GstVideoInfo * out_info);
98 static GstFlowReturn gst_chroma_hold_transform_frame_ip (GstVideoFilter *
99 vfilter, GstVideoFrame * frame);
100 static void gst_chroma_hold_before_transform (GstBaseTransform * btrans,
103 static void gst_chroma_hold_init_params (GstChromaHold * self);
104 static gboolean gst_chroma_hold_set_process_function (GstChromaHold * self);
106 static void gst_chroma_hold_set_property (GObject * object, guint prop_id,
107 const GValue * value, GParamSpec * pspec);
108 static void gst_chroma_hold_get_property (GObject * object, guint prop_id,
109 GValue * value, GParamSpec * pspec);
110 static void gst_chroma_hold_finalize (GObject * object);
112 #define gst_chroma_hold_parent_class parent_class
113 G_DEFINE_TYPE (GstChromaHold, gst_chroma_hold, GST_TYPE_VIDEO_FILTER);
114 GST_ELEMENT_REGISTER_DEFINE (chromahold, "chromahold",
115 GST_RANK_NONE, gst_chroma_hold_get_type ());
118 gst_chroma_hold_class_init (GstChromaHoldClass * klass)
120 GObjectClass *gobject_class = (GObjectClass *) klass;
121 GstElementClass *gstelement_class = (GstElementClass *) klass;
122 GstBaseTransformClass *btrans_class = (GstBaseTransformClass *) klass;
123 GstVideoFilterClass *vfilter_class = (GstVideoFilterClass *) klass;
125 gobject_class->set_property = gst_chroma_hold_set_property;
126 gobject_class->get_property = gst_chroma_hold_get_property;
127 gobject_class->finalize = gst_chroma_hold_finalize;
129 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TARGET_R,
130 g_param_spec_uint ("target-r", "Target Red", "The Red target", 0, 255,
132 G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
133 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TARGET_G,
134 g_param_spec_uint ("target-g", "Target Green", "The Green target", 0, 255,
136 G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
137 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TARGET_B,
138 g_param_spec_uint ("target-b", "Target Blue", "The Blue target", 0, 255,
140 G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
141 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TOLERANCE,
142 g_param_spec_uint ("tolerance", "Tolerance",
143 "Tolerance for the target color", 0, 180, DEFAULT_TOLERANCE,
144 G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
146 btrans_class->start = GST_DEBUG_FUNCPTR (gst_chroma_hold_start);
147 btrans_class->before_transform =
148 GST_DEBUG_FUNCPTR (gst_chroma_hold_before_transform);
150 vfilter_class->transform_frame_ip =
151 GST_DEBUG_FUNCPTR (gst_chroma_hold_transform_frame_ip);
152 vfilter_class->set_info = GST_DEBUG_FUNCPTR (gst_chroma_hold_set_info);
154 gst_element_class_set_static_metadata (gstelement_class, "Chroma hold filter",
155 "Filter/Effect/Video",
156 "Removes all color information except for one color",
157 "Sebastian Dröge <sebastian.droege@collabora.co.uk>");
159 gst_element_class_add_static_pad_template (gstelement_class,
160 &gst_chroma_hold_sink_template);
161 gst_element_class_add_static_pad_template (gstelement_class,
162 &gst_chroma_hold_src_template);
164 GST_DEBUG_CATEGORY_INIT (gst_chroma_hold_debug, "chromahold", 0,
165 "chromahold - Removes all color information except for one color");
169 gst_chroma_hold_init (GstChromaHold * self)
171 self->target_r = DEFAULT_TARGET_R;
172 self->target_g = DEFAULT_TARGET_G;
173 self->target_b = DEFAULT_TARGET_B;
174 self->tolerance = DEFAULT_TOLERANCE;
176 g_mutex_init (&self->lock);
180 gst_chroma_hold_finalize (GObject * object)
182 GstChromaHold *self = GST_CHROMA_HOLD (object);
184 g_mutex_clear (&self->lock);
186 G_OBJECT_CLASS (parent_class)->finalize (object);
190 gst_chroma_hold_set_property (GObject * object, guint prop_id,
191 const GValue * value, GParamSpec * pspec)
193 GstChromaHold *self = GST_CHROMA_HOLD (object);
195 GST_CHROMA_HOLD_LOCK (self);
198 self->target_r = g_value_get_uint (value);
199 gst_chroma_hold_init_params (self);
202 self->target_g = g_value_get_uint (value);
203 gst_chroma_hold_init_params (self);
206 self->target_b = g_value_get_uint (value);
207 gst_chroma_hold_init_params (self);
210 self->tolerance = g_value_get_uint (value);
213 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
217 GST_CHROMA_HOLD_UNLOCK (self);
221 gst_chroma_hold_get_property (GObject * object, guint prop_id, GValue * value,
224 GstChromaHold *self = GST_CHROMA_HOLD (object);
228 g_value_set_uint (value, self->target_r);
231 g_value_set_uint (value, self->target_g);
234 g_value_set_uint (value, self->target_b);
237 g_value_set_uint (value, self->tolerance);
240 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
246 gst_chroma_hold_set_info (GstVideoFilter * vfilter, GstCaps * incaps,
247 GstVideoInfo * in_info, GstCaps * outcaps, GstVideoInfo * out_info)
249 GstChromaHold *self = GST_CHROMA_HOLD (vfilter);
251 GST_CHROMA_HOLD_LOCK (self);
253 GST_DEBUG_OBJECT (self,
254 "Setting caps %" GST_PTR_FORMAT " -> %" GST_PTR_FORMAT, incaps, outcaps);
256 self->format = GST_VIDEO_INFO_FORMAT (in_info);
257 self->width = GST_VIDEO_INFO_WIDTH (in_info);
258 self->height = GST_VIDEO_INFO_HEIGHT (in_info);
260 if (!gst_chroma_hold_set_process_function (self)) {
261 GST_WARNING_OBJECT (self, "No processing function for this caps");
262 GST_CHROMA_HOLD_UNLOCK (self);
266 GST_CHROMA_HOLD_UNLOCK (self);
272 rgb_to_hue (gint r, gint g, gint b)
276 m = MIN (MIN (r, g), b);
277 M = MAX (MAX (r, g), b);
284 h = ((256 * 60 * (g - b) + C2) / C);
286 h = ((256 * 60 * (b - r) + C2) / C) + 120 * 256;
289 h = ((256 * 60 * (r - g) + C2) / C) + 240 * 256;
302 hue_dist (gint h1, gint h2)
318 gst_chroma_hold_process_xrgb (GstVideoFrame * frame, gint width,
319 gint height, GstChromaHold * self)
325 gint tolerance = self->tolerance;
331 dest = GST_VIDEO_FRAME_PLANE_DATA (frame, 0);
332 p[0] = GST_VIDEO_FRAME_COMP_POFFSET (frame, 3);
333 p[1] = GST_VIDEO_FRAME_COMP_POFFSET (frame, 0);
334 p[2] = GST_VIDEO_FRAME_COMP_POFFSET (frame, 1);
335 p[3] = GST_VIDEO_FRAME_COMP_POFFSET (frame, 2);
336 row_wrap = GST_VIDEO_FRAME_PLANE_STRIDE (frame, 0) - 4 * width;
340 for (i = 0; i < height; i++) {
341 for (j = 0; j < width; j++) {
346 h2 = rgb_to_hue (r, g, b);
347 diff = hue_dist (h1, h2);
348 if (h1 == G_MAXUINT || diff > tolerance) {
349 grey = (13938 * r + 46869 * g + 4730 * b) >> 16;
350 grey = CLAMP (grey, 0, 255);
362 /* Protected with the chroma hold lock */
364 gst_chroma_hold_init_params (GstChromaHold * self)
366 self->hue = rgb_to_hue (self->target_r, self->target_g, self->target_b);
369 /* Protected with the chroma hold lock */
371 gst_chroma_hold_set_process_function (GstChromaHold * self)
373 self->process = NULL;
375 switch (self->format) {
376 case GST_VIDEO_FORMAT_ARGB:
377 case GST_VIDEO_FORMAT_ABGR:
378 case GST_VIDEO_FORMAT_RGBA:
379 case GST_VIDEO_FORMAT_BGRA:
380 case GST_VIDEO_FORMAT_xRGB:
381 case GST_VIDEO_FORMAT_xBGR:
382 case GST_VIDEO_FORMAT_RGBx:
383 case GST_VIDEO_FORMAT_BGRx:
384 self->process = gst_chroma_hold_process_xrgb;
389 return self->process != NULL;
393 gst_chroma_hold_start (GstBaseTransform * btrans)
395 GstChromaHold *self = GST_CHROMA_HOLD (btrans);
397 GST_CHROMA_HOLD_LOCK (self);
398 gst_chroma_hold_init_params (self);
399 GST_CHROMA_HOLD_UNLOCK (self);
405 gst_chroma_hold_before_transform (GstBaseTransform * btrans, GstBuffer * buf)
407 GstChromaHold *self = GST_CHROMA_HOLD (btrans);
408 GstClockTime timestamp;
410 timestamp = gst_segment_to_stream_time (&btrans->segment, GST_FORMAT_TIME,
411 GST_BUFFER_TIMESTAMP (buf));
412 GST_LOG ("Got stream time of %" GST_TIME_FORMAT, GST_TIME_ARGS (timestamp));
413 if (GST_CLOCK_TIME_IS_VALID (timestamp))
414 gst_object_sync_values (GST_OBJECT (self), timestamp);
418 gst_chroma_hold_transform_frame_ip (GstVideoFilter * vfilter,
419 GstVideoFrame * frame)
421 GstChromaHold *self = GST_CHROMA_HOLD (vfilter);
423 GST_CHROMA_HOLD_LOCK (self);
425 if (G_UNLIKELY (!self->process)) {
426 GST_ERROR_OBJECT (self, "Not negotiated yet");
427 GST_CHROMA_HOLD_UNLOCK (self);
428 return GST_FLOW_NOT_NEGOTIATED;
431 self->process (frame, self->width, self->height, self);
433 GST_CHROMA_HOLD_UNLOCK (self);