2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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.
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.
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., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
21 * SECTION:element-alphacolor
23 * The alphacolor element does memory-efficient (in-place) colourspace
24 * conversion from RGBA to AYUV or AYUV to RGBA while preserving the
29 * gst-launch videotestsrc ! "video/x-raw-yuv,format=(fourcc)AYUV" ! \
30 * alphacolor ! "video/x-raw-rgb" ! ffmpegcolorspace ! autovideosink
38 #include "gstalphacolor.h"
41 #include <gst/video/video.h>
45 GST_DEBUG_CATEGORY_STATIC (alpha_color_debug);
46 #define GST_CAT_DEFAULT alpha_color_debug
48 /* elementfactory information */
49 static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
52 GST_STATIC_CAPS (GST_VIDEO_CAPS_RGBA ";" GST_VIDEO_CAPS_BGRA ";"
53 GST_VIDEO_CAPS_ARGB ";" GST_VIDEO_CAPS_ABGR ";"
54 GST_VIDEO_CAPS_YUV ("AYUV"))
57 static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
60 GST_STATIC_CAPS (GST_VIDEO_CAPS_RGBA ";" GST_VIDEO_CAPS_BGRA ";"
61 GST_VIDEO_CAPS_ARGB ";" GST_VIDEO_CAPS_ABGR ";"
62 GST_VIDEO_CAPS_YUV ("AYUV"))
65 GST_BOILERPLATE (GstAlphaColor, gst_alpha_color, GstVideoFilter,
66 GST_TYPE_VIDEO_FILTER);
68 static GstCaps *gst_alpha_color_transform_caps (GstBaseTransform * btrans,
69 GstPadDirection direction, GstCaps * caps);
70 static gboolean gst_alpha_color_set_caps (GstBaseTransform * btrans,
71 GstCaps * incaps, GstCaps * outcaps);
72 static GstFlowReturn gst_alpha_color_transform_ip (GstBaseTransform * btrans,
76 gst_alpha_color_base_init (gpointer g_class)
78 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
80 gst_element_class_set_details_simple (element_class, "Alpha color filter",
81 "Filter/Converter/Video",
82 "ARGB from/to AYUV colorspace conversion preserving the alpha channel",
83 "Wim Taymans <wim@fluendo.com>");
85 gst_element_class_add_static_pad_template (element_class,
87 gst_element_class_add_static_pad_template (element_class, &src_template);
91 gst_alpha_color_class_init (GstAlphaColorClass * klass)
93 GstBaseTransformClass *gstbasetransform_class =
94 (GstBaseTransformClass *) klass;
96 gstbasetransform_class->transform_caps =
97 GST_DEBUG_FUNCPTR (gst_alpha_color_transform_caps);
98 gstbasetransform_class->set_caps =
99 GST_DEBUG_FUNCPTR (gst_alpha_color_set_caps);
100 gstbasetransform_class->transform_ip =
101 GST_DEBUG_FUNCPTR (gst_alpha_color_transform_ip);
103 GST_DEBUG_CATEGORY_INIT (alpha_color_debug, "alphacolor", 0,
104 "ARGB<->AYUV colorspace conversion preserving the alpha channels");
108 gst_alpha_color_init (GstAlphaColor * alpha, GstAlphaColorClass * g_class)
110 GstBaseTransform *btrans = GST_BASE_TRANSFORM (alpha);
112 btrans->always_in_place = TRUE;
116 gst_alpha_color_transform_caps (GstBaseTransform * btrans,
117 GstPadDirection direction, GstCaps * caps)
119 const GstCaps *tmpl_caps = NULL;
120 GstCaps *result = NULL, *local_caps = NULL;
123 local_caps = gst_caps_new_empty ();
125 for (i = 0; i < gst_caps_get_size (caps); i++) {
126 GstStructure *structure =
127 gst_structure_copy (gst_caps_get_structure (caps, i));
129 /* Remove any specific parameter from the structure */
130 gst_structure_remove_field (structure, "format");
131 gst_structure_remove_field (structure, "endianness");
132 gst_structure_remove_field (structure, "depth");
133 gst_structure_remove_field (structure, "bpp");
134 gst_structure_remove_field (structure, "red_mask");
135 gst_structure_remove_field (structure, "green_mask");
136 gst_structure_remove_field (structure, "blue_mask");
137 gst_structure_remove_field (structure, "alpha_mask");
138 gst_structure_remove_field (structure, "color-matrix");
139 gst_structure_remove_field (structure, "chroma-site");
141 gst_structure_set_name (structure, "video/x-raw-rgb");
142 gst_caps_append_structure (local_caps, gst_structure_copy (structure));
143 gst_structure_set_name (structure, "video/x-raw-yuv");
144 gst_caps_append_structure (local_caps, structure);
147 /* Get the appropriate template */
148 if (direction == GST_PAD_SINK) {
149 tmpl_caps = gst_static_pad_template_get_caps (&src_template);
150 } else if (direction == GST_PAD_SRC) {
151 tmpl_caps = gst_static_pad_template_get_caps (&sink_template);
154 /* Intersect with our template caps */
155 result = gst_caps_intersect (local_caps, tmpl_caps);
157 gst_caps_unref (local_caps);
158 gst_caps_do_simplify (result);
160 GST_LOG_OBJECT (btrans, "transformed %" GST_PTR_FORMAT " to %" GST_PTR_FORMAT,
166 /* Generated by -bad/ext/cog/generate_tables */
167 static const int cog_ycbcr_to_rgb_matrix_8bit_hdtv[] = {
169 298, -55, -136, 19681,
173 static const int cog_ycbcr_to_rgb_matrix_8bit_sdtv[] = {
175 298, -100, -208, 34707,
179 static const gint cog_rgb_to_ycbcr_matrix_8bit_hdtv[] = {
181 -26, -87, 112, 32768,
182 112, -102, -10, 32768,
185 static const gint cog_rgb_to_ycbcr_matrix_8bit_sdtv[] = {
187 -38, -74, 112, 32768,
188 112, -94, -18, 32768,
191 static const gint cog_ycbcr_sdtv_to_ycbcr_hdtv_matrix_8bit[] = {
192 256, -30, -53, 10600,
197 static const gint cog_ycbcr_hdtv_to_ycbcr_sdtv_matrix_8bit[] = {
203 #define DEFINE_ARGB_AYUV_FUNCTIONS(name, A, R, G, B) \
205 transform_##name##_ayuv (guint8 * data, gint size, const gint *matrix) \
212 memcpy (yc, matrix, 4 * sizeof (gint)); \
213 memcpy (uc, matrix + 4, 4 * sizeof (gint)); \
214 memcpy (vc, matrix + 8, 4 * sizeof (gint)); \
217 y = (data[R] * yc[0] + data[G] * yc[1] + data[B] * yc[2] + yc[3]) >> 8; \
218 u = (data[R] * uc[0] + data[G] * uc[1] + data[B] * uc[2] + uc[3]) >> 8; \
219 v = (data[R] * vc[0] + data[G] * vc[1] + data[B] * vc[2] + vc[3]) >> 8; \
232 transform_ayuv_##name (guint8 * data, gint size, const gint *matrix) \
239 memcpy (rc, matrix, 4 * sizeof (gint)); \
240 memcpy (gc, matrix + 4, 4 * sizeof (gint)); \
241 memcpy (bc, matrix + 8, 4 * sizeof (gint)); \
244 r = (data[1] * rc[0] + data[2] * rc[1] + data[3] * rc[2] + rc[3]) >> 8; \
245 g = (data[1] * gc[0] + data[2] * gc[1] + data[3] * gc[2] + gc[3]) >> 8; \
246 b = (data[1] * bc[0] + data[2] * bc[1] + data[3] * bc[2] + bc[3]) >> 8; \
249 data[R] = CLAMP (r, 0, 255); \
250 data[G] = CLAMP (g, 0, 255); \
251 data[B] = CLAMP (b, 0, 255); \
258 DEFINE_ARGB_AYUV_FUNCTIONS (rgba, 3, 0, 1, 2);
259 DEFINE_ARGB_AYUV_FUNCTIONS (bgra, 3, 2, 1, 0);
260 DEFINE_ARGB_AYUV_FUNCTIONS (argb, 0, 1, 2, 3);
261 DEFINE_ARGB_AYUV_FUNCTIONS (abgr, 0, 3, 2, 1);
264 transform_ayuv_ayuv (guint8 * data, gint size, const gint * matrix)
274 memcpy (yc, matrix, 4 * sizeof (gint));
275 memcpy (uc, matrix + 4, 4 * sizeof (gint));
276 memcpy (vc, matrix + 8, 4 * sizeof (gint));
279 y = (data[1] * yc[0] + data[2] * yc[1] + data[3] * yc[2] + yc[3]) >> 8;
280 u = (data[1] * uc[0] + data[2] * uc[1] + data[3] * uc[2] + uc[3]) >> 8;
281 v = (data[1] * vc[0] + data[2] * vc[1] + data[3] * vc[2] + vc[3]) >> 8;
293 transform_argb_bgra (guint8 * data, gint size, const gint * matrix)
312 #define transform_abgr_rgba transform_argb_bgra
315 transform_argb_abgr (guint8 * data, gint size, const gint * matrix)
324 /* data[0] = data[0]; */
334 #define transform_abgr_argb transform_argb_abgr
337 transform_rgba_bgra (guint8 * data, gint size, const gint * matrix)
346 /* data[3] = data[3] */ ;
356 #define transform_bgra_rgba transform_rgba_bgra
359 transform_argb_rgba (guint8 * data, gint size, const gint * matrix)
378 #define transform_abgr_bgra transform_argb_rgba
381 transform_bgra_argb (guint8 * data, gint size, const gint * matrix)
400 #define transform_rgba_abgr transform_bgra_argb
403 transform_rgba_argb (guint8 * data, gint size, const gint * matrix)
422 #define transform_bgra_abgr transform_rgba_argb
425 gst_alpha_color_set_caps (GstBaseTransform * btrans, GstCaps * incaps,
428 GstAlphaColor *alpha = GST_ALPHA_COLOR (btrans);
432 GstVideoFormat in_format, out_format;
434 gboolean in_sdtv, out_sdtv;
436 alpha->process = NULL;
437 alpha->matrix = NULL;
439 ret = gst_video_format_parse_caps (incaps, &in_format, &w, &h);
440 ret &= gst_video_format_parse_caps (outcaps, &out_format, &w2, &h2);
442 if (!ret || w != w2 || h != h2) {
443 GST_DEBUG_OBJECT (alpha, "incomplete or invalid caps!");
447 matrix = gst_video_parse_caps_color_matrix (incaps);
448 in_sdtv = matrix ? g_str_equal (matrix, "sdtv") : TRUE;
449 matrix = gst_video_parse_caps_color_matrix (outcaps);
450 out_sdtv = matrix ? g_str_equal (matrix, "sdtv") : TRUE;
452 alpha->in_format = in_format;
453 alpha->out_format = out_format;
457 switch (alpha->in_format) {
458 case GST_VIDEO_FORMAT_ARGB:
459 switch (alpha->out_format) {
460 case GST_VIDEO_FORMAT_ARGB:
461 alpha->process = NULL;
462 alpha->matrix = NULL;
464 case GST_VIDEO_FORMAT_BGRA:
465 alpha->process = transform_argb_bgra;
466 alpha->matrix = NULL;
468 case GST_VIDEO_FORMAT_ABGR:
469 alpha->process = transform_argb_abgr;
470 alpha->matrix = NULL;
472 case GST_VIDEO_FORMAT_RGBA:
473 alpha->process = transform_argb_rgba;
474 alpha->matrix = NULL;
476 case GST_VIDEO_FORMAT_AYUV:
477 alpha->process = transform_argb_ayuv;
479 out_sdtv ? cog_rgb_to_ycbcr_matrix_8bit_sdtv :
480 cog_rgb_to_ycbcr_matrix_8bit_hdtv;
483 alpha->process = NULL;
484 alpha->matrix = NULL;
488 case GST_VIDEO_FORMAT_BGRA:
489 switch (alpha->out_format) {
490 case GST_VIDEO_FORMAT_BGRA:
491 alpha->process = NULL;
492 alpha->matrix = NULL;
494 case GST_VIDEO_FORMAT_ARGB:
495 alpha->process = transform_bgra_argb;
496 alpha->matrix = NULL;
498 case GST_VIDEO_FORMAT_ABGR:
499 alpha->process = transform_bgra_abgr;
500 alpha->matrix = NULL;
502 case GST_VIDEO_FORMAT_RGBA:
503 alpha->process = transform_bgra_rgba;
504 alpha->matrix = NULL;
506 case GST_VIDEO_FORMAT_AYUV:
507 alpha->process = transform_bgra_ayuv;
509 out_sdtv ? cog_rgb_to_ycbcr_matrix_8bit_sdtv :
510 cog_rgb_to_ycbcr_matrix_8bit_hdtv;
513 alpha->process = NULL;
514 alpha->matrix = NULL;
518 case GST_VIDEO_FORMAT_ABGR:
519 switch (alpha->out_format) {
520 case GST_VIDEO_FORMAT_ABGR:
521 alpha->process = NULL;
522 alpha->matrix = NULL;
524 case GST_VIDEO_FORMAT_RGBA:
525 alpha->process = transform_abgr_rgba;
526 alpha->matrix = NULL;
528 case GST_VIDEO_FORMAT_ARGB:
529 alpha->process = transform_abgr_argb;
530 alpha->matrix = NULL;
532 case GST_VIDEO_FORMAT_BGRA:
533 alpha->process = transform_abgr_bgra;
534 alpha->matrix = NULL;
536 case GST_VIDEO_FORMAT_AYUV:
537 alpha->process = transform_abgr_ayuv;
539 out_sdtv ? cog_rgb_to_ycbcr_matrix_8bit_sdtv :
540 cog_rgb_to_ycbcr_matrix_8bit_hdtv;
543 alpha->process = NULL;
544 alpha->matrix = NULL;
548 case GST_VIDEO_FORMAT_RGBA:
549 switch (alpha->out_format) {
550 case GST_VIDEO_FORMAT_RGBA:
551 alpha->process = NULL;
552 alpha->matrix = NULL;
554 case GST_VIDEO_FORMAT_ARGB:
555 alpha->process = transform_rgba_argb;
556 alpha->matrix = NULL;
558 case GST_VIDEO_FORMAT_ABGR:
559 alpha->process = transform_rgba_abgr;
560 alpha->matrix = NULL;
562 case GST_VIDEO_FORMAT_BGRA:
563 alpha->process = transform_rgba_bgra;
564 alpha->matrix = NULL;
566 case GST_VIDEO_FORMAT_AYUV:
567 alpha->process = transform_rgba_ayuv;
569 out_sdtv ? cog_rgb_to_ycbcr_matrix_8bit_sdtv :
570 cog_rgb_to_ycbcr_matrix_8bit_hdtv;
573 alpha->process = NULL;
574 alpha->matrix = NULL;
578 case GST_VIDEO_FORMAT_AYUV:
579 switch (alpha->out_format) {
580 case GST_VIDEO_FORMAT_AYUV:
581 if (in_sdtv == out_sdtv) {
582 alpha->process = transform_ayuv_ayuv;
583 alpha->matrix = NULL;
585 alpha->process = transform_ayuv_ayuv;
587 out_sdtv ? cog_ycbcr_hdtv_to_ycbcr_sdtv_matrix_8bit :
588 cog_ycbcr_sdtv_to_ycbcr_hdtv_matrix_8bit;
591 case GST_VIDEO_FORMAT_ARGB:
592 alpha->process = transform_ayuv_argb;
594 in_sdtv ? cog_ycbcr_to_rgb_matrix_8bit_sdtv :
595 cog_ycbcr_to_rgb_matrix_8bit_hdtv;
597 case GST_VIDEO_FORMAT_BGRA:
598 alpha->process = transform_ayuv_bgra;
600 in_sdtv ? cog_ycbcr_to_rgb_matrix_8bit_sdtv :
601 cog_ycbcr_to_rgb_matrix_8bit_hdtv;
603 case GST_VIDEO_FORMAT_ABGR:
604 alpha->process = transform_ayuv_abgr;
606 in_sdtv ? cog_ycbcr_to_rgb_matrix_8bit_sdtv :
607 cog_ycbcr_to_rgb_matrix_8bit_hdtv;
609 case GST_VIDEO_FORMAT_RGBA:
610 alpha->process = transform_ayuv_rgba;
612 in_sdtv ? cog_ycbcr_to_rgb_matrix_8bit_sdtv :
613 cog_ycbcr_to_rgb_matrix_8bit_hdtv;
616 alpha->process = NULL;
617 alpha->matrix = NULL;
622 alpha->process = NULL;
623 alpha->matrix = NULL;
627 if (in_format == out_format && in_sdtv == out_sdtv)
628 gst_base_transform_set_passthrough (btrans, TRUE);
629 else if (!alpha->process)
636 gst_alpha_color_transform_ip (GstBaseTransform * btrans, GstBuffer * inbuf)
638 GstAlphaColor *alpha = GST_ALPHA_COLOR (btrans);
640 if (G_UNLIKELY (GST_BUFFER_SIZE (inbuf) != 4 * alpha->width * alpha->height)) {
641 GST_ERROR_OBJECT (alpha, "Invalid buffer size (was %u, expected %u)",
642 GST_BUFFER_SIZE (inbuf), alpha->width * alpha->height);
643 return GST_FLOW_ERROR;
646 if (gst_base_transform_is_passthrough (btrans))
649 if (G_UNLIKELY (!alpha->process)) {
650 GST_ERROR_OBJECT (alpha, "Not negotiated yet");
651 return GST_FLOW_NOT_NEGOTIATED;
654 /* Transform in place */
655 alpha->process (GST_BUFFER_DATA (inbuf), GST_BUFFER_SIZE (inbuf),
662 plugin_init (GstPlugin * plugin)
664 return gst_element_register (plugin, "alphacolor", GST_RANK_NONE,
665 GST_TYPE_ALPHA_COLOR);
668 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
671 "RGBA from/to AYUV colorspace conversion preserving the alpha channel",
672 plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)