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;
294 transform_argb_bgra (guint8 * data, gint size, const gint * matrix)
313 #define transform_abgr_rgba transform_argb_bgra
316 transform_argb_abgr (guint8 * data, gint size, const gint * matrix)
325 /* data[0] = data[0]; */
335 #define transform_abgr_argb transform_argb_abgr
338 transform_rgba_bgra (guint8 * data, gint size, const gint * matrix)
347 /* data[3] = data[3] */ ;
357 #define transform_bgra_rgba transform_rgba_bgra
360 transform_argb_rgba (guint8 * data, gint size, const gint * matrix)
379 #define transform_abgr_bgra transform_argb_rgba
382 transform_bgra_argb (guint8 * data, gint size, const gint * matrix)
401 #define transform_rgba_abgr transform_bgra_argb
404 transform_rgba_argb (guint8 * data, gint size, const gint * matrix)
423 #define transform_bgra_abgr transform_rgba_argb
426 gst_alpha_color_set_caps (GstBaseTransform * btrans, GstCaps * incaps,
429 GstAlphaColor *alpha = GST_ALPHA_COLOR (btrans);
433 GstVideoFormat in_format, out_format;
435 gboolean in_sdtv, out_sdtv;
437 alpha->process = NULL;
438 alpha->matrix = NULL;
440 ret = gst_video_format_parse_caps (incaps, &in_format, &w, &h);
441 ret &= gst_video_format_parse_caps (outcaps, &out_format, &w2, &h2);
443 if (!ret || w != w2 || h != h2) {
444 GST_DEBUG_OBJECT (alpha, "incomplete or invalid caps!");
448 matrix = gst_video_parse_caps_color_matrix (incaps);
449 in_sdtv = matrix ? g_str_equal (matrix, "sdtv") : TRUE;
450 matrix = gst_video_parse_caps_color_matrix (outcaps);
451 out_sdtv = matrix ? g_str_equal (matrix, "sdtv") : TRUE;
453 alpha->in_format = in_format;
454 alpha->out_format = out_format;
458 switch (alpha->in_format) {
459 case GST_VIDEO_FORMAT_ARGB:
460 switch (alpha->out_format) {
461 case GST_VIDEO_FORMAT_ARGB:
462 alpha->process = NULL;
463 alpha->matrix = NULL;
465 case GST_VIDEO_FORMAT_BGRA:
466 alpha->process = transform_argb_bgra;
467 alpha->matrix = NULL;
469 case GST_VIDEO_FORMAT_ABGR:
470 alpha->process = transform_argb_abgr;
471 alpha->matrix = NULL;
473 case GST_VIDEO_FORMAT_RGBA:
474 alpha->process = transform_argb_rgba;
475 alpha->matrix = NULL;
477 case GST_VIDEO_FORMAT_AYUV:
478 alpha->process = transform_argb_ayuv;
480 out_sdtv ? cog_rgb_to_ycbcr_matrix_8bit_sdtv :
481 cog_rgb_to_ycbcr_matrix_8bit_hdtv;
484 alpha->process = NULL;
485 alpha->matrix = NULL;
489 case GST_VIDEO_FORMAT_BGRA:
490 switch (alpha->out_format) {
491 case GST_VIDEO_FORMAT_BGRA:
492 alpha->process = NULL;
493 alpha->matrix = NULL;
495 case GST_VIDEO_FORMAT_ARGB:
496 alpha->process = transform_bgra_argb;
497 alpha->matrix = NULL;
499 case GST_VIDEO_FORMAT_ABGR:
500 alpha->process = transform_bgra_abgr;
501 alpha->matrix = NULL;
503 case GST_VIDEO_FORMAT_RGBA:
504 alpha->process = transform_bgra_rgba;
505 alpha->matrix = NULL;
507 case GST_VIDEO_FORMAT_AYUV:
508 alpha->process = transform_bgra_ayuv;
510 out_sdtv ? cog_rgb_to_ycbcr_matrix_8bit_sdtv :
511 cog_rgb_to_ycbcr_matrix_8bit_hdtv;
514 alpha->process = NULL;
515 alpha->matrix = NULL;
519 case GST_VIDEO_FORMAT_ABGR:
520 switch (alpha->out_format) {
521 case GST_VIDEO_FORMAT_ABGR:
522 alpha->process = NULL;
523 alpha->matrix = NULL;
525 case GST_VIDEO_FORMAT_RGBA:
526 alpha->process = transform_abgr_rgba;
527 alpha->matrix = NULL;
529 case GST_VIDEO_FORMAT_ARGB:
530 alpha->process = transform_abgr_argb;
531 alpha->matrix = NULL;
533 case GST_VIDEO_FORMAT_BGRA:
534 alpha->process = transform_abgr_bgra;
535 alpha->matrix = NULL;
537 case GST_VIDEO_FORMAT_AYUV:
538 alpha->process = transform_abgr_ayuv;
540 out_sdtv ? cog_rgb_to_ycbcr_matrix_8bit_sdtv :
541 cog_rgb_to_ycbcr_matrix_8bit_hdtv;
544 alpha->process = NULL;
545 alpha->matrix = NULL;
549 case GST_VIDEO_FORMAT_RGBA:
550 switch (alpha->out_format) {
551 case GST_VIDEO_FORMAT_RGBA:
552 alpha->process = NULL;
553 alpha->matrix = NULL;
555 case GST_VIDEO_FORMAT_ARGB:
556 alpha->process = transform_rgba_argb;
557 alpha->matrix = NULL;
559 case GST_VIDEO_FORMAT_ABGR:
560 alpha->process = transform_rgba_abgr;
561 alpha->matrix = NULL;
563 case GST_VIDEO_FORMAT_BGRA:
564 alpha->process = transform_rgba_bgra;
565 alpha->matrix = NULL;
567 case GST_VIDEO_FORMAT_AYUV:
568 alpha->process = transform_rgba_ayuv;
570 out_sdtv ? cog_rgb_to_ycbcr_matrix_8bit_sdtv :
571 cog_rgb_to_ycbcr_matrix_8bit_hdtv;
574 alpha->process = NULL;
575 alpha->matrix = NULL;
579 case GST_VIDEO_FORMAT_AYUV:
580 switch (alpha->out_format) {
581 case GST_VIDEO_FORMAT_AYUV:
582 if (in_sdtv == out_sdtv) {
583 alpha->process = transform_ayuv_ayuv;
584 alpha->matrix = NULL;
586 alpha->process = transform_ayuv_ayuv;
588 out_sdtv ? cog_ycbcr_hdtv_to_ycbcr_sdtv_matrix_8bit :
589 cog_ycbcr_sdtv_to_ycbcr_hdtv_matrix_8bit;
592 case GST_VIDEO_FORMAT_ARGB:
593 alpha->process = transform_ayuv_argb;
595 in_sdtv ? cog_ycbcr_to_rgb_matrix_8bit_sdtv :
596 cog_ycbcr_to_rgb_matrix_8bit_hdtv;
598 case GST_VIDEO_FORMAT_BGRA:
599 alpha->process = transform_ayuv_bgra;
601 in_sdtv ? cog_ycbcr_to_rgb_matrix_8bit_sdtv :
602 cog_ycbcr_to_rgb_matrix_8bit_hdtv;
604 case GST_VIDEO_FORMAT_ABGR:
605 alpha->process = transform_ayuv_abgr;
607 in_sdtv ? cog_ycbcr_to_rgb_matrix_8bit_sdtv :
608 cog_ycbcr_to_rgb_matrix_8bit_hdtv;
610 case GST_VIDEO_FORMAT_RGBA:
611 alpha->process = transform_ayuv_rgba;
613 in_sdtv ? cog_ycbcr_to_rgb_matrix_8bit_sdtv :
614 cog_ycbcr_to_rgb_matrix_8bit_hdtv;
617 alpha->process = NULL;
618 alpha->matrix = NULL;
623 alpha->process = NULL;
624 alpha->matrix = NULL;
628 if (in_format == out_format && in_sdtv == out_sdtv)
629 gst_base_transform_set_passthrough (btrans, TRUE);
630 else if (!alpha->process)
637 gst_alpha_color_transform_ip (GstBaseTransform * btrans, GstBuffer * inbuf)
639 GstAlphaColor *alpha = GST_ALPHA_COLOR (btrans);
641 if (G_UNLIKELY (GST_BUFFER_SIZE (inbuf) != 4 * alpha->width * alpha->height)) {
642 GST_ERROR_OBJECT (alpha, "Invalid buffer size (was %u, expected %u)",
643 GST_BUFFER_SIZE (inbuf), alpha->width * alpha->height);
644 return GST_FLOW_ERROR;
647 if (gst_base_transform_is_passthrough (btrans))
650 if (G_UNLIKELY (!alpha->process)) {
651 GST_ERROR_OBJECT (alpha, "Not negotiated yet");
652 return GST_FLOW_NOT_NEGOTIATED;
655 /* Transform in place */
656 alpha->process (GST_BUFFER_DATA (inbuf), GST_BUFFER_SIZE (inbuf),
663 plugin_init (GstPlugin * plugin)
665 return gst_element_register (plugin, "alphacolor", GST_RANK_NONE,
666 GST_TYPE_ALPHA_COLOR);
669 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
672 "RGBA from/to AYUV colorspace conversion preserving the alpha channel",
673 plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)