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
27 * The chromahold element will remove all color information for
28 * all colors except a single one and converts them to grayscale.
32 * gst-launch videotestsrc pattern=smpte75 ! \
33 * chromahold target-r=0 target-g=0 target-b=255 ! \
34 * videoconvert ! autovideosink \
35 * ]| This pipeline only keeps the red color.
42 #include "gstchromahold.h"
48 GST_DEBUG_CATEGORY_STATIC (gst_chroma_hold_debug);
49 #define GST_CAT_DEFAULT gst_chroma_hold_debug
51 #define DEFAULT_TARGET_R 255
52 #define DEFAULT_TARGET_G 0
53 #define DEFAULT_TARGET_B 0
54 #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);
116 gst_chroma_hold_class_init (GstChromaHoldClass * klass)
118 GObjectClass *gobject_class = (GObjectClass *) klass;
119 GstElementClass *gstelement_class = (GstElementClass *) klass;
120 GstBaseTransformClass *btrans_class = (GstBaseTransformClass *) klass;
121 GstVideoFilterClass *vfilter_class = (GstVideoFilterClass *) klass;
123 gobject_class->set_property = gst_chroma_hold_set_property;
124 gobject_class->get_property = gst_chroma_hold_get_property;
125 gobject_class->finalize = gst_chroma_hold_finalize;
127 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TARGET_R,
128 g_param_spec_uint ("target-r", "Target Red", "The Red target", 0, 255,
130 G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
131 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TARGET_G,
132 g_param_spec_uint ("target-g", "Target Green", "The Green target", 0, 255,
134 G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
135 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TARGET_B,
136 g_param_spec_uint ("target-b", "Target Blue", "The Blue target", 0, 255,
138 G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
139 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TOLERANCE,
140 g_param_spec_uint ("tolerance", "Tolerance",
141 "Tolerance for the target color", 0, 180, DEFAULT_TOLERANCE,
142 G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
144 btrans_class->start = GST_DEBUG_FUNCPTR (gst_chroma_hold_start);
145 btrans_class->before_transform =
146 GST_DEBUG_FUNCPTR (gst_chroma_hold_before_transform);
148 vfilter_class->transform_frame_ip =
149 GST_DEBUG_FUNCPTR (gst_chroma_hold_transform_frame_ip);
150 vfilter_class->set_info = GST_DEBUG_FUNCPTR (gst_chroma_hold_set_info);
152 gst_element_class_set_static_metadata (gstelement_class, "Chroma hold filter",
153 "Filter/Effect/Video",
154 "Removes all color information except for one color",
155 "Sebastian Dröge <sebastian.droege@collabora.co.uk>");
157 gst_element_class_add_pad_template (gstelement_class,
158 gst_static_pad_template_get (&gst_chroma_hold_sink_template));
159 gst_element_class_add_pad_template (gstelement_class,
160 gst_static_pad_template_get (&gst_chroma_hold_src_template));
162 GST_DEBUG_CATEGORY_INIT (gst_chroma_hold_debug, "chromahold", 0,
163 "chromahold - Removes all color information except for one color");
167 gst_chroma_hold_init (GstChromaHold * self)
169 self->target_r = DEFAULT_TARGET_R;
170 self->target_g = DEFAULT_TARGET_G;
171 self->target_b = DEFAULT_TARGET_B;
172 self->tolerance = DEFAULT_TOLERANCE;
174 g_mutex_init (&self->lock);
178 gst_chroma_hold_finalize (GObject * object)
180 GstChromaHold *self = GST_CHROMA_HOLD (object);
182 g_mutex_clear (&self->lock);
184 G_OBJECT_CLASS (parent_class)->finalize (object);
188 gst_chroma_hold_set_property (GObject * object, guint prop_id,
189 const GValue * value, GParamSpec * pspec)
191 GstChromaHold *self = GST_CHROMA_HOLD (object);
193 GST_CHROMA_HOLD_LOCK (self);
196 self->target_r = g_value_get_uint (value);
197 gst_chroma_hold_init_params (self);
200 self->target_g = g_value_get_uint (value);
201 gst_chroma_hold_init_params (self);
204 self->target_b = g_value_get_uint (value);
205 gst_chroma_hold_init_params (self);
208 self->tolerance = g_value_get_uint (value);
211 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
215 GST_CHROMA_HOLD_UNLOCK (self);
219 gst_chroma_hold_get_property (GObject * object, guint prop_id, GValue * value,
222 GstChromaHold *self = GST_CHROMA_HOLD (object);
226 g_value_set_uint (value, self->target_r);
229 g_value_set_uint (value, self->target_g);
232 g_value_set_uint (value, self->target_b);
235 g_value_set_uint (value, self->tolerance);
238 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
244 gst_chroma_hold_set_info (GstVideoFilter * vfilter, GstCaps * incaps,
245 GstVideoInfo * in_info, GstCaps * outcaps, GstVideoInfo * out_info)
247 GstChromaHold *self = GST_CHROMA_HOLD (vfilter);
249 GST_CHROMA_HOLD_LOCK (self);
251 GST_DEBUG_OBJECT (self,
252 "Setting caps %" GST_PTR_FORMAT " -> %" GST_PTR_FORMAT, incaps, outcaps);
254 self->format = GST_VIDEO_INFO_FORMAT (in_info);
255 self->width = GST_VIDEO_INFO_WIDTH (in_info);
256 self->height = GST_VIDEO_INFO_HEIGHT (in_info);
258 if (!gst_chroma_hold_set_process_function (self)) {
259 GST_WARNING_OBJECT (self, "No processing function for this caps");
260 GST_CHROMA_HOLD_UNLOCK (self);
264 GST_CHROMA_HOLD_UNLOCK (self);
270 rgb_to_hue (gint r, gint g, gint b)
274 m = MIN (MIN (r, g), b);
275 M = MAX (MAX (r, g), b);
282 h = ((256 * 60 * (g - b) + C2) / C);
284 h = ((256 * 60 * (b - r) + C2) / C) + 120 * 256;
287 h = ((256 * 60 * (r - g) + C2) / C) + 240 * 256;
300 hue_dist (gint h1, gint h2)
316 gst_chroma_hold_process_xrgb (GstVideoFrame * frame, gint width,
317 gint height, GstChromaHold * self)
323 gint tolerance = self->tolerance;
329 dest = GST_VIDEO_FRAME_PLANE_DATA (frame, 0);
330 p[0] = GST_VIDEO_FRAME_COMP_POFFSET (frame, 3);
331 p[1] = GST_VIDEO_FRAME_COMP_POFFSET (frame, 0);
332 p[2] = GST_VIDEO_FRAME_COMP_POFFSET (frame, 1);
333 p[3] = GST_VIDEO_FRAME_COMP_POFFSET (frame, 2);
334 row_wrap = GST_VIDEO_FRAME_PLANE_STRIDE (frame, 0) - 4 * width;
338 for (i = 0; i < height; i++) {
339 for (j = 0; j < width; j++) {
344 h2 = rgb_to_hue (r, g, b);
345 diff = hue_dist (h1, h2);
346 if (h1 == G_MAXUINT || diff > tolerance) {
347 grey = (13938 * r + 46869 * g + 4730 * b) >> 16;
348 grey = CLAMP (grey, 0, 255);
360 /* Protected with the chroma hold lock */
362 gst_chroma_hold_init_params (GstChromaHold * self)
364 self->hue = rgb_to_hue (self->target_r, self->target_g, self->target_b);
367 /* Protected with the chroma hold lock */
369 gst_chroma_hold_set_process_function (GstChromaHold * self)
371 self->process = NULL;
373 switch (self->format) {
374 case GST_VIDEO_FORMAT_ARGB:
375 case GST_VIDEO_FORMAT_ABGR:
376 case GST_VIDEO_FORMAT_RGBA:
377 case GST_VIDEO_FORMAT_BGRA:
378 case GST_VIDEO_FORMAT_xRGB:
379 case GST_VIDEO_FORMAT_xBGR:
380 case GST_VIDEO_FORMAT_RGBx:
381 case GST_VIDEO_FORMAT_BGRx:
382 self->process = gst_chroma_hold_process_xrgb;
387 return self->process != NULL;
391 gst_chroma_hold_start (GstBaseTransform * btrans)
393 GstChromaHold *self = GST_CHROMA_HOLD (btrans);
395 GST_CHROMA_HOLD_LOCK (self);
396 gst_chroma_hold_init_params (self);
397 GST_CHROMA_HOLD_UNLOCK (self);
403 gst_chroma_hold_before_transform (GstBaseTransform * btrans, GstBuffer * buf)
405 GstChromaHold *self = GST_CHROMA_HOLD (btrans);
406 GstClockTime timestamp;
408 timestamp = gst_segment_to_stream_time (&btrans->segment, GST_FORMAT_TIME,
409 GST_BUFFER_TIMESTAMP (buf));
410 GST_LOG ("Got stream time of %" GST_TIME_FORMAT, GST_TIME_ARGS (timestamp));
411 if (GST_CLOCK_TIME_IS_VALID (timestamp))
412 gst_object_sync_values (GST_OBJECT (self), timestamp);
416 gst_chroma_hold_transform_frame_ip (GstVideoFilter * vfilter,
417 GstVideoFrame * frame)
419 GstChromaHold *self = GST_CHROMA_HOLD (vfilter);
421 GST_CHROMA_HOLD_LOCK (self);
423 if (G_UNLIKELY (!self->process)) {
424 GST_ERROR_OBJECT (self, "Not negotiated yet");
425 GST_CHROMA_HOLD_UNLOCK (self);
426 return GST_FLOW_NOT_NEGOTIATED;
429 self->process (frame, self->width, self->height, self);
431 GST_CHROMA_HOLD_UNLOCK (self);