1 /* GStreamer
2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
3 * Copyright (C) <2003> David Schleef <ds@schleef.org>
4 * Copyright (C) 2003 Arwed v. Merkatz <v.merkatz@gmx.net>
5 * Copyright (C) 2006 Mark Nauwelaerts <manauw@skynet.be>
6 * Copyright (C) 2010 Sebastian Dröge <sebastian.droege@collabora.co.uk>
7 *
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.
12 *
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.
17 *
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.
22 */
23
24 /*
25 * This file was (probably) generated from
26 * gstvideotemplate.c,v 1.12 2004/01/07 21:07:12 ds Exp
27 * and
28 * make_filter,v 1.6 2004/01/07 21:33:01 ds Exp
29 */
30
31 /**
32 * SECTION:element-gamma
33 *
34 * Performs gamma correction on a video stream.
35 *
36 * <refsect2>
37 * <title>Example launch line</title>
38 * |[
39 * gst-launch-1.0 videotestsrc ! gamma gamma=2.0 ! videoconvert ! ximagesink
40 * ]| This pipeline will make the image "brighter".
41 * |[
42 * gst-launch-1.0 videotestsrc ! gamma gamma=0.5 ! videoconvert ! ximagesink
43 * ]| This pipeline will make the image "darker".
44 * </refsect2>
45 */
46
47 #ifdef HAVE_CONFIG_H
48 #include "config.h"
49 #endif
50
51 #include "gstgamma.h"
52 #include <string.h>
53 #include <math.h>
54
55 #include <gst/video/video.h>
56
57 GST_DEBUG_CATEGORY_STATIC (gamma_debug);
58 #define GST_CAT_DEFAULT gamma_debug
59
60 /* GstGamma properties */
61 enum
62 {
63 PROP_0,
64 PROP_GAMMA
65 /* FILL ME */
66 };
67
68 #define DEFAULT_PROP_GAMMA 1
69
70 static GstStaticPadTemplate gst_gamma_src_template =
71 GST_STATIC_PAD_TEMPLATE ("src",
72 GST_PAD_SRC,
73 GST_PAD_ALWAYS,
74 GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{ AYUV, "
75 "ARGB, BGRA, ABGR, RGBA, Y444, "
76 "xRGB, RGBx, xBGR, BGRx, RGB, BGR, Y42B, NV12, "
77 "NV21, YUY2, UYVY, YVYU, I420, YV12, IYUV, Y41B }"))
78 );
79
80 static GstStaticPadTemplate gst_gamma_sink_template =
81 GST_STATIC_PAD_TEMPLATE ("sink",
82 GST_PAD_SINK,
83 GST_PAD_ALWAYS,
84 GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{ AYUV, "
85 "ARGB, BGRA, ABGR, RGBA, Y444, "
86 "xRGB, RGBx, xBGR, BGRx, RGB, BGR, Y42B, NV12, "
87 "NV21, YUY2, UYVY, YVYU, I420, YV12, IYUV, Y41B }"))
88 );
89
90 static void gst_gamma_set_property (GObject * object, guint prop_id,
91 const GValue * value, GParamSpec * pspec);
92 static void gst_gamma_get_property (GObject * object, guint prop_id,
93 GValue * value, GParamSpec * pspec);
94
95 static gboolean gst_gamma_set_info (GstVideoFilter * vfilter, GstCaps * incaps,
96 GstVideoInfo * in_info, GstCaps * outcaps, GstVideoInfo * out_info);
97 static GstFlowReturn gst_gamma_transform_frame_ip (GstVideoFilter * vfilter,
98 GstVideoFrame * frame);
99 static void gst_gamma_before_transform (GstBaseTransform * transform,
100 GstBuffer * buf);
101
102 static void gst_gamma_calculate_tables (GstGamma * gamma);
103
104 G_DEFINE_TYPE (GstGamma, gst_gamma, GST_TYPE_VIDEO_FILTER);
105
106 static void
gst_gamma_class_init(GstGammaClass * g_class)107 gst_gamma_class_init (GstGammaClass * g_class)
108 {
109 GObjectClass *gobject_class = (GObjectClass *) g_class;
110 GstElementClass *gstelement_class = (GstElementClass *) g_class;
111 GstBaseTransformClass *trans_class = (GstBaseTransformClass *) g_class;
112 GstVideoFilterClass *vfilter_class = (GstVideoFilterClass *) g_class;
113
114 GST_DEBUG_CATEGORY_INIT (gamma_debug, "gamma", 0, "gamma");
115
116 gobject_class->set_property = gst_gamma_set_property;
117 gobject_class->get_property = gst_gamma_get_property;
118
119 g_object_class_install_property (gobject_class, PROP_GAMMA,
120 g_param_spec_double ("gamma", "Gamma", "gamma",
121 0.01, 10, DEFAULT_PROP_GAMMA,
122 GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS | G_PARAM_READWRITE));
123
124 gst_element_class_set_static_metadata (gstelement_class,
125 "Video gamma correction", "Filter/Effect/Video",
126 "Adjusts gamma on a video stream", "Arwed v. Merkatz <v.merkatz@gmx.net");
127
128 gst_element_class_add_static_pad_template (gstelement_class,
129 &gst_gamma_sink_template);
130 gst_element_class_add_static_pad_template (gstelement_class,
131 &gst_gamma_src_template);
132
133 trans_class->before_transform =
134 GST_DEBUG_FUNCPTR (gst_gamma_before_transform);
135 trans_class->transform_ip_on_passthrough = FALSE;
136
137 vfilter_class->set_info = GST_DEBUG_FUNCPTR (gst_gamma_set_info);
138 vfilter_class->transform_frame_ip =
139 GST_DEBUG_FUNCPTR (gst_gamma_transform_frame_ip);
140 }
141
142 static void
gst_gamma_init(GstGamma * gamma)143 gst_gamma_init (GstGamma * gamma)
144 {
145 /* properties */
146 gamma->gamma = DEFAULT_PROP_GAMMA;
147 gst_gamma_calculate_tables (gamma);
148 }
149
150 static void
gst_gamma_set_property(GObject * object,guint prop_id,const GValue * value,GParamSpec * pspec)151 gst_gamma_set_property (GObject * object, guint prop_id, const GValue * value,
152 GParamSpec * pspec)
153 {
154 GstGamma *gamma = GST_GAMMA (object);
155
156 switch (prop_id) {
157 case PROP_GAMMA:{
158 gdouble val = g_value_get_double (value);
159
160 GST_DEBUG_OBJECT (gamma, "Changing gamma from %lf to %lf", gamma->gamma,
161 val);
162 GST_OBJECT_LOCK (gamma);
163 gamma->gamma = val;
164 GST_OBJECT_UNLOCK (gamma);
165 gst_gamma_calculate_tables (gamma);
166 break;
167 }
168 default:
169 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
170 break;
171 }
172 }
173
174 static void
gst_gamma_get_property(GObject * object,guint prop_id,GValue * value,GParamSpec * pspec)175 gst_gamma_get_property (GObject * object, guint prop_id, GValue * value,
176 GParamSpec * pspec)
177 {
178 GstGamma *gamma = GST_GAMMA (object);
179
180 switch (prop_id) {
181 case PROP_GAMMA:
182 g_value_set_double (value, gamma->gamma);
183 break;
184 default:
185 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
186 break;
187 }
188 }
189
190 static void
gst_gamma_calculate_tables(GstGamma * gamma)191 gst_gamma_calculate_tables (GstGamma * gamma)
192 {
193 gint n;
194 gdouble val;
195 gdouble exp;
196 gboolean passthrough = FALSE;
197
198 GST_OBJECT_LOCK (gamma);
199 if (gamma->gamma == 1.0) {
200 passthrough = TRUE;
201 } else {
202 exp = 1.0 / gamma->gamma;
203 for (n = 0; n < 256; n++) {
204 val = n / 255.0;
205 val = pow (val, exp);
206 val = 255.0 * val;
207 gamma->gamma_table[n] = (guint8) floor (val + 0.5);
208 }
209 }
210 GST_OBJECT_UNLOCK (gamma);
211
212 gst_base_transform_set_passthrough (GST_BASE_TRANSFORM (gamma), passthrough);
213 }
214
215 static void
gst_gamma_planar_yuv_ip(GstGamma * gamma,GstVideoFrame * frame)216 gst_gamma_planar_yuv_ip (GstGamma * gamma, GstVideoFrame * frame)
217 {
218 gint i, j, height;
219 gint width, stride, row_wrap;
220 const guint8 *table = gamma->gamma_table;
221 guint8 *data;
222
223 data = GST_VIDEO_FRAME_COMP_DATA (frame, 0);
224 stride = GST_VIDEO_FRAME_COMP_STRIDE (frame, 0);
225 width = GST_VIDEO_FRAME_COMP_WIDTH (frame, 0);
226 height = GST_VIDEO_FRAME_COMP_HEIGHT (frame, 0);
227 row_wrap = stride - width;
228
229 for (i = 0; i < height; i++) {
230 for (j = 0; j < width; j++) {
231 *data = table[*data];
232 data++;
233 }
234 data += row_wrap;
235 }
236 }
237
238 static void
gst_gamma_packed_yuv_ip(GstGamma * gamma,GstVideoFrame * frame)239 gst_gamma_packed_yuv_ip (GstGamma * gamma, GstVideoFrame * frame)
240 {
241 gint i, j, height;
242 gint width, stride, row_wrap;
243 gint pixel_stride;
244 const guint8 *table = gamma->gamma_table;
245 guint8 *data;
246
247 data = GST_VIDEO_FRAME_COMP_DATA (frame, 0);
248 stride = GST_VIDEO_FRAME_COMP_STRIDE (frame, 0);
249 width = GST_VIDEO_FRAME_COMP_WIDTH (frame, 0);
250 height = GST_VIDEO_FRAME_COMP_HEIGHT (frame, 0);
251 pixel_stride = GST_VIDEO_FRAME_COMP_PSTRIDE (frame, 0);
252 row_wrap = stride - pixel_stride * width;
253
254 for (i = 0; i < height; i++) {
255 for (j = 0; j < width; j++) {
256 *data = table[*data];
257 data += pixel_stride;
258 }
259 data += row_wrap;
260 }
261 }
262
263 static const int cog_ycbcr_to_rgb_matrix_8bit_sdtv[] = {
264 298, 0, 409, -57068,
265 298, -100, -208, 34707,
266 298, 516, 0, -70870,
267 };
268
269 static const gint cog_rgb_to_ycbcr_matrix_8bit_sdtv[] = {
270 66, 129, 25, 4096,
271 -38, -74, 112, 32768,
272 112, -94, -18, 32768,
273 };
274
275 #define APPLY_MATRIX(m,o,v1,v2,v3) ((m[o*4] * v1 + m[o*4+1] * v2 + m[o*4+2] * v3 + m[o*4+3]) >> 8)
276
277 static void
gst_gamma_packed_rgb_ip(GstGamma * gamma,GstVideoFrame * frame)278 gst_gamma_packed_rgb_ip (GstGamma * gamma, GstVideoFrame * frame)
279 {
280 gint i, j, height;
281 gint width, stride, row_wrap;
282 gint pixel_stride;
283 const guint8 *table = gamma->gamma_table;
284 gint offsets[3];
285 gint r, g, b;
286 gint y, u, v;
287 guint8 *data;
288
289 data = GST_VIDEO_FRAME_PLANE_DATA (frame, 0);
290 stride = GST_VIDEO_FRAME_PLANE_STRIDE (frame, 0);
291 width = GST_VIDEO_FRAME_COMP_WIDTH (frame, 0);
292 height = GST_VIDEO_FRAME_COMP_HEIGHT (frame, 0);
293
294 offsets[0] = GST_VIDEO_FRAME_COMP_OFFSET (frame, 0);
295 offsets[1] = GST_VIDEO_FRAME_COMP_OFFSET (frame, 1);
296 offsets[2] = GST_VIDEO_FRAME_COMP_OFFSET (frame, 2);
297
298 pixel_stride = GST_VIDEO_FRAME_COMP_PSTRIDE (frame, 0);
299 row_wrap = stride - pixel_stride * width;
300
301 for (i = 0; i < height; i++) {
302 for (j = 0; j < width; j++) {
303 r = data[offsets[0]];
304 g = data[offsets[1]];
305 b = data[offsets[2]];
306
307 y = APPLY_MATRIX (cog_rgb_to_ycbcr_matrix_8bit_sdtv, 0, r, g, b);
308 u = APPLY_MATRIX (cog_rgb_to_ycbcr_matrix_8bit_sdtv, 1, r, g, b);
309 v = APPLY_MATRIX (cog_rgb_to_ycbcr_matrix_8bit_sdtv, 2, r, g, b);
310
311 y = table[CLAMP (y, 0, 255)];
312 r = APPLY_MATRIX (cog_ycbcr_to_rgb_matrix_8bit_sdtv, 0, y, u, v);
313 g = APPLY_MATRIX (cog_ycbcr_to_rgb_matrix_8bit_sdtv, 1, y, u, v);
314 b = APPLY_MATRIX (cog_ycbcr_to_rgb_matrix_8bit_sdtv, 2, y, u, v);
315
316 data[offsets[0]] = CLAMP (r, 0, 255);
317 data[offsets[1]] = CLAMP (g, 0, 255);
318 data[offsets[2]] = CLAMP (b, 0, 255);
319 data += pixel_stride;
320 }
321 data += row_wrap;
322 }
323 }
324
325 static gboolean
gst_gamma_set_info(GstVideoFilter * vfilter,GstCaps * incaps,GstVideoInfo * in_info,GstCaps * outcaps,GstVideoInfo * out_info)326 gst_gamma_set_info (GstVideoFilter * vfilter, GstCaps * incaps,
327 GstVideoInfo * in_info, GstCaps * outcaps, GstVideoInfo * out_info)
328 {
329 GstGamma *gamma = GST_GAMMA (vfilter);
330
331 GST_DEBUG_OBJECT (gamma,
332 "setting caps: in %" GST_PTR_FORMAT " out %" GST_PTR_FORMAT, incaps,
333 outcaps);
334
335 switch (GST_VIDEO_INFO_FORMAT (in_info)) {
336 case GST_VIDEO_FORMAT_I420:
337 case GST_VIDEO_FORMAT_YV12:
338 case GST_VIDEO_FORMAT_Y41B:
339 case GST_VIDEO_FORMAT_Y42B:
340 case GST_VIDEO_FORMAT_Y444:
341 case GST_VIDEO_FORMAT_NV12:
342 case GST_VIDEO_FORMAT_NV21:
343 gamma->process = gst_gamma_planar_yuv_ip;
344 break;
345 case GST_VIDEO_FORMAT_YUY2:
346 case GST_VIDEO_FORMAT_UYVY:
347 case GST_VIDEO_FORMAT_AYUV:
348 case GST_VIDEO_FORMAT_YVYU:
349 gamma->process = gst_gamma_packed_yuv_ip;
350 break;
351 case GST_VIDEO_FORMAT_ARGB:
352 case GST_VIDEO_FORMAT_ABGR:
353 case GST_VIDEO_FORMAT_RGBA:
354 case GST_VIDEO_FORMAT_BGRA:
355 case GST_VIDEO_FORMAT_xRGB:
356 case GST_VIDEO_FORMAT_xBGR:
357 case GST_VIDEO_FORMAT_RGBx:
358 case GST_VIDEO_FORMAT_BGRx:
359 case GST_VIDEO_FORMAT_RGB:
360 case GST_VIDEO_FORMAT_BGR:
361 gamma->process = gst_gamma_packed_rgb_ip;
362 break;
363 default:
364 goto invalid_caps;
365 break;
366 }
367 return TRUE;
368
369 /* ERRORS */
370 invalid_caps:
371 {
372 GST_ERROR_OBJECT (gamma, "Invalid caps: %" GST_PTR_FORMAT, incaps);
373 return FALSE;
374 }
375 }
376
377 static void
gst_gamma_before_transform(GstBaseTransform * base,GstBuffer * outbuf)378 gst_gamma_before_transform (GstBaseTransform * base, GstBuffer * outbuf)
379 {
380 GstGamma *gamma = GST_GAMMA (base);
381 GstClockTime timestamp, stream_time;
382
383 timestamp = GST_BUFFER_TIMESTAMP (outbuf);
384 stream_time =
385 gst_segment_to_stream_time (&base->segment, GST_FORMAT_TIME, timestamp);
386
387 GST_DEBUG_OBJECT (gamma, "sync to %" GST_TIME_FORMAT,
388 GST_TIME_ARGS (timestamp));
389
390 if (GST_CLOCK_TIME_IS_VALID (stream_time))
391 gst_object_sync_values (GST_OBJECT (gamma), stream_time);
392 }
393
394 static GstFlowReturn
gst_gamma_transform_frame_ip(GstVideoFilter * vfilter,GstVideoFrame * frame)395 gst_gamma_transform_frame_ip (GstVideoFilter * vfilter, GstVideoFrame * frame)
396 {
397 GstGamma *gamma = GST_GAMMA (vfilter);
398
399 if (!gamma->process)
400 goto not_negotiated;
401
402 GST_OBJECT_LOCK (gamma);
403 gamma->process (gamma, frame);
404 GST_OBJECT_UNLOCK (gamma);
405
406 return GST_FLOW_OK;
407
408 /* ERRORS */
409 not_negotiated:
410 {
411 GST_ERROR_OBJECT (gamma, "Not negotiated yet");
412 return GST_FLOW_NOT_NEGOTIATED;
413 }
414 }
415