1 /* GStreamer
2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
13 *
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
18 */
19
20 /**
21 * SECTION:element-alphacolor
22 *
23 * The alphacolor element does memory-efficient (in-place) colourspace
24 * conversion from RGBA to AYUV or AYUV to RGBA while preserving the
25 * alpha channel.
26 *
27 * Sample pipeline:
28 * |[
29 * gst-launch-1.0 videotestsrc ! "video/x-raw,format=(fourcc)AYUV" ! \
30 * alphacolor ! videoconvert ! autovideosink
31 * ]|
32 */
33
34 #ifdef HAVE_CONFIG_H
35 #include "config.h"
36 #endif
37
38 #include "gstalphacolor.h"
39
40 #include <gst/gst.h>
41 #include <gst/video/video.h>
42
43 #include <string.h>
44
45 GST_DEBUG_CATEGORY_STATIC (alpha_color_debug);
46 #define GST_CAT_DEFAULT alpha_color_debug
47
48 /* elementfactory information */
49 static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
50 GST_PAD_SINK,
51 GST_PAD_ALWAYS,
52 GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{ RGBA, BGRA, ARGB, ABGR, AYUV }"))
53 );
54
55 static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
56 GST_PAD_SRC,
57 GST_PAD_ALWAYS,
58 GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{ RGBA, BGRA, ARGB, ABGR, AYUV }"))
59 );
60
61 G_DEFINE_TYPE (GstAlphaColor, gst_alpha_color, GST_TYPE_VIDEO_FILTER);
62
63 static GstCaps *gst_alpha_color_transform_caps (GstBaseTransform * btrans,
64 GstPadDirection direction, GstCaps * caps, GstCaps * filter);
65
66 static gboolean gst_alpha_color_set_info (GstVideoFilter * filter,
67 GstCaps * incaps, GstVideoInfo * in_info, GstCaps * outcaps,
68 GstVideoInfo * out_info);
69 static GstFlowReturn gst_alpha_color_transform_frame_ip (GstVideoFilter *
70 filter, GstVideoFrame * frame);
71
72 static void
gst_alpha_color_class_init(GstAlphaColorClass * klass)73 gst_alpha_color_class_init (GstAlphaColorClass * klass)
74 {
75 GstElementClass *gstelement_class = (GstElementClass *) klass;
76 GstBaseTransformClass *gstbasetransform_class =
77 (GstBaseTransformClass *) klass;
78 GstVideoFilterClass *gstvideofilter_class = (GstVideoFilterClass *) klass;
79
80 GST_DEBUG_CATEGORY_INIT (alpha_color_debug, "alphacolor", 0,
81 "ARGB<->AYUV colorspace conversion preserving the alpha channels");
82
83 gst_element_class_set_static_metadata (gstelement_class, "Alpha color filter",
84 "Filter/Converter/Video",
85 "ARGB from/to AYUV colorspace conversion preserving the alpha channel",
86 "Wim Taymans <wim.taymans@gmail.com>");
87
88 gst_element_class_add_static_pad_template (gstelement_class, &sink_template);
89 gst_element_class_add_static_pad_template (gstelement_class, &src_template);
90
91 gstbasetransform_class->transform_caps =
92 GST_DEBUG_FUNCPTR (gst_alpha_color_transform_caps);
93 gstbasetransform_class->transform_ip_on_passthrough = FALSE;
94
95 gstvideofilter_class->set_info = GST_DEBUG_FUNCPTR (gst_alpha_color_set_info);
96 gstvideofilter_class->transform_frame_ip =
97 GST_DEBUG_FUNCPTR (gst_alpha_color_transform_frame_ip);
98 }
99
100 static void
gst_alpha_color_init(GstAlphaColor * alpha)101 gst_alpha_color_init (GstAlphaColor * alpha)
102 {
103 GstBaseTransform *btrans = GST_BASE_TRANSFORM (alpha);
104
105 gst_base_transform_set_in_place (btrans, TRUE);
106 }
107
108 static GstCaps *
gst_alpha_color_transform_caps(GstBaseTransform * btrans,GstPadDirection direction,GstCaps * caps,GstCaps * filter)109 gst_alpha_color_transform_caps (GstBaseTransform * btrans,
110 GstPadDirection direction, GstCaps * caps, GstCaps * filter)
111 {
112 GstCaps *tmpl_caps = NULL;
113 GstCaps *result = NULL, *local_caps = NULL;
114 guint i;
115
116 local_caps = gst_caps_new_empty ();
117
118 for (i = 0; i < gst_caps_get_size (caps); i++) {
119 GstStructure *structure =
120 gst_structure_copy (gst_caps_get_structure (caps, i));
121
122 /* Remove any specific parameter from the structure */
123 gst_structure_remove_field (structure, "format");
124 gst_structure_remove_field (structure, "colorimetry");
125 gst_structure_remove_field (structure, "chroma-site");
126
127 gst_structure_set_name (structure, "video/x-raw");
128 gst_caps_append_structure (local_caps, structure);
129 }
130
131 /* Get the appropriate template */
132 if (direction == GST_PAD_SINK) {
133 tmpl_caps = gst_static_pad_template_get_caps (&src_template);
134 } else if (direction == GST_PAD_SRC) {
135 tmpl_caps = gst_static_pad_template_get_caps (&sink_template);
136 }
137
138 /* Intersect with our template caps */
139 result = gst_caps_intersect (local_caps, tmpl_caps);
140 gst_caps_unref (tmpl_caps);
141 gst_caps_unref (local_caps);
142
143 result = gst_caps_simplify (result);
144
145 GST_LOG_OBJECT (btrans, "transformed %" GST_PTR_FORMAT " to %" GST_PTR_FORMAT,
146 caps, result);
147
148 if (filter) {
149 GstCaps *intersection;
150
151 GST_DEBUG_OBJECT (btrans, "Using filter caps %" GST_PTR_FORMAT, filter);
152 intersection =
153 gst_caps_intersect_full (filter, result, GST_CAPS_INTERSECT_FIRST);
154 gst_caps_unref (result);
155 result = intersection;
156 GST_DEBUG_OBJECT (btrans, "Intersection %" GST_PTR_FORMAT, result);
157 }
158
159
160 return result;
161 }
162
163 /* Generated by -bad/ext/cog/generate_tables */
164 static const int cog_ycbcr_to_rgb_matrix_8bit_hdtv[] = {
165 298, 0, 459, -63514,
166 298, -55, -136, 19681,
167 298, 541, 0, -73988,
168 };
169
170 static const int cog_ycbcr_to_rgb_matrix_8bit_sdtv[] = {
171 298, 0, 409, -57068,
172 298, -100, -208, 34707,
173 298, 516, 0, -70870,
174 };
175
176 static const gint cog_rgb_to_ycbcr_matrix_8bit_hdtv[] = {
177 47, 157, 16, 4096,
178 -26, -87, 112, 32768,
179 112, -102, -10, 32768,
180 };
181
182 static const gint cog_rgb_to_ycbcr_matrix_8bit_sdtv[] = {
183 66, 129, 25, 4096,
184 -38, -74, 112, 32768,
185 112, -94, -18, 32768,
186 };
187
188 static const gint cog_ycbcr_sdtv_to_ycbcr_hdtv_matrix_8bit[] = {
189 256, -30, -53, 10600,
190 0, 261, 29, -4367,
191 0, 19, 262, -3289,
192 };
193
194 static const gint cog_ycbcr_hdtv_to_ycbcr_sdtv_matrix_8bit[] = {
195 256, 25, 49, -9536,
196 0, 253, -28, 3958,
197 0, -19, 252, 2918,
198 };
199
200 #define DEFINE_ARGB_AYUV_FUNCTIONS(name, A, R, G, B) \
201 static void \
202 transform_##name##_ayuv (GstVideoFrame * frame, const gint *matrix) \
203 { \
204 guint8 *data; \
205 gsize size; \
206 gint y, u, v; \
207 gint yc[4]; \
208 gint uc[4]; \
209 gint vc[4]; \
210 \
211 data = GST_VIDEO_FRAME_PLANE_DATA (frame, 0);\
212 size = GST_VIDEO_FRAME_SIZE (frame);\
213 \
214 memcpy (yc, matrix, 4 * sizeof (gint)); \
215 memcpy (uc, matrix + 4, 4 * sizeof (gint)); \
216 memcpy (vc, matrix + 8, 4 * sizeof (gint)); \
217 \
218 while (size > 0) { \
219 y = (data[R] * yc[0] + data[G] * yc[1] + data[B] * yc[2] + yc[3]) >> 8; \
220 u = (data[R] * uc[0] + data[G] * uc[1] + data[B] * uc[2] + uc[3]) >> 8; \
221 v = (data[R] * vc[0] + data[G] * vc[1] + data[B] * vc[2] + vc[3]) >> 8; \
222 \
223 data[0] = data[A]; \
224 data[1] = y; \
225 data[2] = u; \
226 data[3] = v; \
227 \
228 data += 4; \
229 size -= 4; \
230 } \
231 } \
232 \
233 static void \
234 transform_ayuv_##name (GstVideoFrame * frame, const gint *matrix) \
235 { \
236 guint8 *data; \
237 gsize size; \
238 gint r, g, b; \
239 gint rc[4]; \
240 gint gc[4]; \
241 gint bc[4]; \
242 \
243 data = GST_VIDEO_FRAME_PLANE_DATA (frame, 0);\
244 size = GST_VIDEO_FRAME_SIZE (frame);\
245 \
246 memcpy (rc, matrix, 4 * sizeof (gint)); \
247 memcpy (gc, matrix + 4, 4 * sizeof (gint)); \
248 memcpy (bc, matrix + 8, 4 * sizeof (gint)); \
249 \
250 while (size > 0) { \
251 r = (data[1] * rc[0] + data[2] * rc[1] + data[3] * rc[2] + rc[3]) >> 8; \
252 g = (data[1] * gc[0] + data[2] * gc[1] + data[3] * gc[2] + gc[3]) >> 8; \
253 b = (data[1] * bc[0] + data[2] * bc[1] + data[3] * bc[2] + bc[3]) >> 8; \
254 \
255 data[A] = data[0]; \
256 data[R] = CLAMP (r, 0, 255); \
257 data[G] = CLAMP (g, 0, 255); \
258 data[B] = CLAMP (b, 0, 255); \
259 \
260 data += 4; \
261 size -= 4; \
262 } \
263 }
264
265 DEFINE_ARGB_AYUV_FUNCTIONS (rgba, 3, 0, 1, 2);
266 DEFINE_ARGB_AYUV_FUNCTIONS (bgra, 3, 2, 1, 0);
267 DEFINE_ARGB_AYUV_FUNCTIONS (argb, 0, 1, 2, 3);
268 DEFINE_ARGB_AYUV_FUNCTIONS (abgr, 0, 3, 2, 1);
269
270 static void
transform_ayuv_ayuv(GstVideoFrame * frame,const gint * matrix)271 transform_ayuv_ayuv (GstVideoFrame * frame, const gint * matrix)
272 {
273 guint8 *data;
274 gsize size;
275 gint y, u, v;
276 gint yc[4];
277 gint uc[4];
278 gint vc[4];
279
280 if (matrix == NULL)
281 return;
282
283 data = GST_VIDEO_FRAME_PLANE_DATA (frame, 0);
284 size = GST_VIDEO_FRAME_SIZE (frame);
285
286 memcpy (yc, matrix, 4 * sizeof (gint));
287 memcpy (uc, matrix + 4, 4 * sizeof (gint));
288 memcpy (vc, matrix + 8, 4 * sizeof (gint));
289
290 while (size > 0) {
291 y = (data[1] * yc[0] + data[2] * yc[1] + data[3] * yc[2] + yc[3]) >> 8;
292 u = (data[1] * uc[0] + data[2] * uc[1] + data[3] * uc[2] + uc[3]) >> 8;
293 v = (data[1] * vc[0] + data[2] * vc[1] + data[3] * vc[2] + vc[3]) >> 8;
294
295 data[1] = y;
296 data[2] = u;
297 data[3] = v;
298
299 data += 4;
300 size -= 4;
301 }
302 }
303
304 static void
transform_argb_bgra(GstVideoFrame * frame,const gint * matrix)305 transform_argb_bgra (GstVideoFrame * frame, const gint * matrix)
306 {
307 guint8 *data;
308 gsize size;
309 gint r, g, b;
310
311 data = GST_VIDEO_FRAME_PLANE_DATA (frame, 0);
312 size = GST_VIDEO_FRAME_SIZE (frame);
313
314 while (size > 0) {
315 r = data[1];
316 g = data[2];
317 b = data[3];
318
319 data[3] = data[0];
320 data[0] = b;
321 data[1] = g;
322 data[2] = r;
323
324 data += 4;
325 size -= 4;
326 }
327 }
328
329 #define transform_abgr_rgba transform_argb_bgra
330
331 static void
transform_argb_abgr(GstVideoFrame * frame,const gint * matrix)332 transform_argb_abgr (GstVideoFrame * frame, const gint * matrix)
333 {
334 guint8 *data;
335 gsize size;
336 gint r, g, b;
337
338 data = GST_VIDEO_FRAME_PLANE_DATA (frame, 0);
339 size = GST_VIDEO_FRAME_SIZE (frame);
340
341 while (size > 0) {
342 r = data[1];
343 g = data[2];
344 b = data[3];
345
346 /* data[0] = data[0]; */
347 data[1] = b;
348 data[2] = g;
349 data[3] = r;
350
351 data += 4;
352 size -= 4;
353 }
354 }
355
356 #define transform_abgr_argb transform_argb_abgr
357
358 static void
transform_rgba_bgra(GstVideoFrame * frame,const gint * matrix)359 transform_rgba_bgra (GstVideoFrame * frame, const gint * matrix)
360 {
361 guint8 *data;
362 gsize size;
363 gint r, g, b;
364
365 data = GST_VIDEO_FRAME_PLANE_DATA (frame, 0);
366 size = GST_VIDEO_FRAME_SIZE (frame);
367
368 while (size > 0) {
369 r = data[0];
370 g = data[1];
371 b = data[2];
372
373 /* data[3] = data[3] */ ;
374 data[0] = b;
375 data[1] = g;
376 data[2] = r;
377
378 data += 4;
379 size -= 4;
380 }
381 }
382
383 #define transform_bgra_rgba transform_rgba_bgra
384
385 static void
transform_argb_rgba(GstVideoFrame * frame,const gint * matrix)386 transform_argb_rgba (GstVideoFrame * frame, const gint * matrix)
387 {
388 guint8 *data;
389 gsize size;
390 gint r, g, b;
391
392 data = GST_VIDEO_FRAME_PLANE_DATA (frame, 0);
393 size = GST_VIDEO_FRAME_SIZE (frame);
394
395 while (size > 0) {
396 r = data[1];
397 g = data[2];
398 b = data[3];
399
400 data[3] = data[0];
401 data[0] = r;
402 data[1] = g;
403 data[2] = b;
404
405 data += 4;
406 size -= 4;
407 }
408 }
409
410 #define transform_abgr_bgra transform_argb_rgba
411
412 static void
transform_bgra_argb(GstVideoFrame * frame,const gint * matrix)413 transform_bgra_argb (GstVideoFrame * frame, const gint * matrix)
414 {
415 guint8 *data;
416 gsize size;
417 gint r, g, b;
418
419 data = GST_VIDEO_FRAME_PLANE_DATA (frame, 0);
420 size = GST_VIDEO_FRAME_SIZE (frame);
421
422 while (size > 0) {
423 r = data[2];
424 g = data[1];
425 b = data[0];
426
427 data[0] = data[3];
428 data[1] = r;
429 data[2] = g;
430 data[3] = b;
431
432 data += 4;
433 size -= 4;
434 }
435 }
436
437 #define transform_rgba_abgr transform_bgra_argb
438
439 static void
transform_rgba_argb(GstVideoFrame * frame,const gint * matrix)440 transform_rgba_argb (GstVideoFrame * frame, const gint * matrix)
441 {
442 guint8 *data;
443 gsize size;
444 gint r, g, b;
445
446 data = GST_VIDEO_FRAME_PLANE_DATA (frame, 0);
447 size = GST_VIDEO_FRAME_SIZE (frame);
448
449 while (size > 0) {
450 r = data[0];
451 g = data[1];
452 b = data[2];
453
454 data[0] = data[3];
455 data[1] = r;
456 data[2] = g;
457 data[3] = b;
458
459 data += 4;
460 size -= 4;
461 }
462 }
463
464 #define transform_bgra_abgr transform_rgba_argb
465
466 static gboolean
gst_alpha_color_set_info(GstVideoFilter * filter,GstCaps * incaps,GstVideoInfo * in_info,GstCaps * outcaps,GstVideoInfo * out_info)467 gst_alpha_color_set_info (GstVideoFilter * filter, GstCaps * incaps,
468 GstVideoInfo * in_info, GstCaps * outcaps, GstVideoInfo * out_info)
469 {
470 GstAlphaColor *alpha = GST_ALPHA_COLOR (filter);
471 gboolean in_sdtv, out_sdtv;
472
473 alpha->process = NULL;
474 alpha->matrix = NULL;
475
476 if (GST_VIDEO_INFO_WIDTH (in_info) != GST_VIDEO_INFO_WIDTH (out_info) ||
477 GST_VIDEO_INFO_HEIGHT (in_info) != GST_VIDEO_INFO_HEIGHT (out_info))
478 goto invalid_caps;
479
480 in_sdtv = in_info->colorimetry.matrix == GST_VIDEO_COLOR_MATRIX_BT601;
481 out_sdtv = out_info->colorimetry.matrix == GST_VIDEO_COLOR_MATRIX_BT601;
482
483 switch (GST_VIDEO_INFO_FORMAT (in_info)) {
484 case GST_VIDEO_FORMAT_ARGB:
485 switch (GST_VIDEO_INFO_FORMAT (out_info)) {
486 case GST_VIDEO_FORMAT_ARGB:
487 alpha->process = NULL;
488 alpha->matrix = NULL;
489 break;
490 case GST_VIDEO_FORMAT_BGRA:
491 alpha->process = transform_argb_bgra;
492 alpha->matrix = NULL;
493 break;
494 case GST_VIDEO_FORMAT_ABGR:
495 alpha->process = transform_argb_abgr;
496 alpha->matrix = NULL;
497 break;
498 case GST_VIDEO_FORMAT_RGBA:
499 alpha->process = transform_argb_rgba;
500 alpha->matrix = NULL;
501 break;
502 case GST_VIDEO_FORMAT_AYUV:
503 alpha->process = transform_argb_ayuv;
504 alpha->matrix =
505 out_sdtv ? cog_rgb_to_ycbcr_matrix_8bit_sdtv :
506 cog_rgb_to_ycbcr_matrix_8bit_hdtv;
507 break;
508 default:
509 alpha->process = NULL;
510 alpha->matrix = NULL;
511 break;
512 }
513 break;
514 case GST_VIDEO_FORMAT_BGRA:
515 switch (GST_VIDEO_INFO_FORMAT (out_info)) {
516 case GST_VIDEO_FORMAT_BGRA:
517 alpha->process = NULL;
518 alpha->matrix = NULL;
519 break;
520 case GST_VIDEO_FORMAT_ARGB:
521 alpha->process = transform_bgra_argb;
522 alpha->matrix = NULL;
523 break;
524 case GST_VIDEO_FORMAT_ABGR:
525 alpha->process = transform_bgra_abgr;
526 alpha->matrix = NULL;
527 break;
528 case GST_VIDEO_FORMAT_RGBA:
529 alpha->process = transform_bgra_rgba;
530 alpha->matrix = NULL;
531 break;
532 case GST_VIDEO_FORMAT_AYUV:
533 alpha->process = transform_bgra_ayuv;
534 alpha->matrix =
535 out_sdtv ? cog_rgb_to_ycbcr_matrix_8bit_sdtv :
536 cog_rgb_to_ycbcr_matrix_8bit_hdtv;
537 break;
538 default:
539 alpha->process = NULL;
540 alpha->matrix = NULL;
541 break;
542 }
543 break;
544 case GST_VIDEO_FORMAT_ABGR:
545 switch (GST_VIDEO_INFO_FORMAT (out_info)) {
546 case GST_VIDEO_FORMAT_ABGR:
547 alpha->process = NULL;
548 alpha->matrix = NULL;
549 break;
550 case GST_VIDEO_FORMAT_RGBA:
551 alpha->process = transform_abgr_rgba;
552 alpha->matrix = NULL;
553 break;
554 case GST_VIDEO_FORMAT_ARGB:
555 alpha->process = transform_abgr_argb;
556 alpha->matrix = NULL;
557 break;
558 case GST_VIDEO_FORMAT_BGRA:
559 alpha->process = transform_abgr_bgra;
560 alpha->matrix = NULL;
561 break;
562 case GST_VIDEO_FORMAT_AYUV:
563 alpha->process = transform_abgr_ayuv;
564 alpha->matrix =
565 out_sdtv ? cog_rgb_to_ycbcr_matrix_8bit_sdtv :
566 cog_rgb_to_ycbcr_matrix_8bit_hdtv;
567 break;
568 default:
569 alpha->process = NULL;
570 alpha->matrix = NULL;
571 break;
572 }
573 break;
574 case GST_VIDEO_FORMAT_RGBA:
575 switch (GST_VIDEO_INFO_FORMAT (out_info)) {
576 case GST_VIDEO_FORMAT_RGBA:
577 alpha->process = NULL;
578 alpha->matrix = NULL;
579 break;
580 case GST_VIDEO_FORMAT_ARGB:
581 alpha->process = transform_rgba_argb;
582 alpha->matrix = NULL;
583 break;
584 case GST_VIDEO_FORMAT_ABGR:
585 alpha->process = transform_rgba_abgr;
586 alpha->matrix = NULL;
587 break;
588 case GST_VIDEO_FORMAT_BGRA:
589 alpha->process = transform_rgba_bgra;
590 alpha->matrix = NULL;
591 break;
592 case GST_VIDEO_FORMAT_AYUV:
593 alpha->process = transform_rgba_ayuv;
594 alpha->matrix =
595 out_sdtv ? cog_rgb_to_ycbcr_matrix_8bit_sdtv :
596 cog_rgb_to_ycbcr_matrix_8bit_hdtv;
597 break;
598 default:
599 alpha->process = NULL;
600 alpha->matrix = NULL;
601 break;
602 }
603 break;
604 case GST_VIDEO_FORMAT_AYUV:
605 switch (GST_VIDEO_INFO_FORMAT (out_info)) {
606 case GST_VIDEO_FORMAT_AYUV:
607 if (in_sdtv == out_sdtv) {
608 alpha->process = transform_ayuv_ayuv;
609 alpha->matrix = NULL;
610 } else {
611 alpha->process = transform_ayuv_ayuv;
612 alpha->matrix =
613 out_sdtv ? cog_ycbcr_hdtv_to_ycbcr_sdtv_matrix_8bit :
614 cog_ycbcr_sdtv_to_ycbcr_hdtv_matrix_8bit;
615 }
616 break;
617 case GST_VIDEO_FORMAT_ARGB:
618 alpha->process = transform_ayuv_argb;
619 alpha->matrix =
620 in_sdtv ? cog_ycbcr_to_rgb_matrix_8bit_sdtv :
621 cog_ycbcr_to_rgb_matrix_8bit_hdtv;
622 break;
623 case GST_VIDEO_FORMAT_BGRA:
624 alpha->process = transform_ayuv_bgra;
625 alpha->matrix =
626 in_sdtv ? cog_ycbcr_to_rgb_matrix_8bit_sdtv :
627 cog_ycbcr_to_rgb_matrix_8bit_hdtv;
628 break;
629 case GST_VIDEO_FORMAT_ABGR:
630 alpha->process = transform_ayuv_abgr;
631 alpha->matrix =
632 in_sdtv ? cog_ycbcr_to_rgb_matrix_8bit_sdtv :
633 cog_ycbcr_to_rgb_matrix_8bit_hdtv;
634 break;
635 case GST_VIDEO_FORMAT_RGBA:
636 alpha->process = transform_ayuv_rgba;
637 alpha->matrix =
638 in_sdtv ? cog_ycbcr_to_rgb_matrix_8bit_sdtv :
639 cog_ycbcr_to_rgb_matrix_8bit_hdtv;
640 break;
641 default:
642 alpha->process = NULL;
643 alpha->matrix = NULL;
644 break;
645 }
646 break;
647 default:
648 alpha->process = NULL;
649 alpha->matrix = NULL;
650 break;
651 }
652
653 if (GST_VIDEO_INFO_FORMAT (in_info) == GST_VIDEO_INFO_FORMAT (out_info)
654 && in_sdtv == out_sdtv)
655 gst_base_transform_set_passthrough (GST_BASE_TRANSFORM (filter), TRUE);
656 else if (!alpha->process)
657 goto no_process;
658
659 return TRUE;
660
661 /* ERRORS */
662 invalid_caps:
663 {
664 GST_DEBUG_OBJECT (alpha, "incomplete or invalid caps");
665 return FALSE;
666 }
667 no_process:
668 {
669 GST_DEBUG_OBJECT (alpha, "could not find process function");
670 return FALSE;
671 }
672 }
673
674 static GstFlowReturn
gst_alpha_color_transform_frame_ip(GstVideoFilter * filter,GstVideoFrame * frame)675 gst_alpha_color_transform_frame_ip (GstVideoFilter * filter,
676 GstVideoFrame * frame)
677 {
678 GstAlphaColor *alpha = GST_ALPHA_COLOR (filter);
679
680 if (G_UNLIKELY (!alpha->process))
681 goto not_negotiated;
682
683 /* Transform in place */
684 alpha->process (frame, alpha->matrix);
685
686 return GST_FLOW_OK;
687
688 /* ERRORS */
689 not_negotiated:
690 {
691 GST_ERROR_OBJECT (alpha, "Not negotiated yet");
692 return GST_FLOW_NOT_NEGOTIATED;
693 }
694 }
695
696 static gboolean
plugin_init(GstPlugin * plugin)697 plugin_init (GstPlugin * plugin)
698 {
699 return gst_element_register (plugin, "alphacolor", GST_RANK_NONE,
700 GST_TYPE_ALPHA_COLOR);
701 }
702
703 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
704 GST_VERSION_MINOR,
705 alphacolor,
706 "RGBA from/to AYUV colorspace conversion preserving the alpha channel",
707 plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
708