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_pad_template (element_class,
86 gst_static_pad_template_get (&sink_template));
87 gst_element_class_add_pad_template (element_class,
88 gst_static_pad_template_get (&src_template));
92 gst_alpha_color_class_init (GstAlphaColorClass * klass)
94 GstBaseTransformClass *gstbasetransform_class =
95 (GstBaseTransformClass *) klass;
97 gstbasetransform_class->transform_caps =
98 GST_DEBUG_FUNCPTR (gst_alpha_color_transform_caps);
99 gstbasetransform_class->set_caps =
100 GST_DEBUG_FUNCPTR (gst_alpha_color_set_caps);
101 gstbasetransform_class->transform_ip =
102 GST_DEBUG_FUNCPTR (gst_alpha_color_transform_ip);
104 GST_DEBUG_CATEGORY_INIT (alpha_color_debug, "alphacolor", 0,
105 "ARGB<->AYUV colorspace conversion preserving the alpha channels");
109 gst_alpha_color_init (GstAlphaColor * alpha, GstAlphaColorClass * g_class)
111 GstBaseTransform *btrans = GST_BASE_TRANSFORM (alpha);
113 btrans->always_in_place = TRUE;
117 gst_alpha_color_transform_caps (GstBaseTransform * btrans,
118 GstPadDirection direction, GstCaps * caps)
120 const GstCaps *tmpl_caps = NULL;
121 GstCaps *result = NULL, *local_caps = NULL;
124 local_caps = gst_caps_new_empty ();
126 for (i = 0; i < gst_caps_get_size (caps); i++) {
127 GstStructure *structure =
128 gst_structure_copy (gst_caps_get_structure (caps, i));
130 /* Remove any specific parameter from the structure */
131 gst_structure_remove_field (structure, "format");
132 gst_structure_remove_field (structure, "endianness");
133 gst_structure_remove_field (structure, "depth");
134 gst_structure_remove_field (structure, "bpp");
135 gst_structure_remove_field (structure, "red_mask");
136 gst_structure_remove_field (structure, "green_mask");
137 gst_structure_remove_field (structure, "blue_mask");
138 gst_structure_remove_field (structure, "alpha_mask");
139 gst_structure_remove_field (structure, "color-matrix");
140 gst_structure_remove_field (structure, "chroma-site");
142 gst_structure_set_name (structure, "video/x-raw-rgb");
143 gst_caps_append_structure (local_caps, gst_structure_copy (structure));
144 gst_structure_set_name (structure, "video/x-raw-yuv");
145 gst_caps_append_structure (local_caps, structure);
148 /* Get the appropriate template */
149 if (direction == GST_PAD_SINK) {
150 tmpl_caps = gst_static_pad_template_get_caps (&src_template);
151 } else if (direction == GST_PAD_SRC) {
152 tmpl_caps = gst_static_pad_template_get_caps (&sink_template);
155 /* Intersect with our template caps */
156 result = gst_caps_intersect (local_caps, tmpl_caps);
158 gst_caps_unref (local_caps);
159 gst_caps_do_simplify (result);
161 GST_LOG_OBJECT (btrans, "transformed %" GST_PTR_FORMAT " to %" GST_PTR_FORMAT,
167 /* Generated by -bad/ext/cog/generate_tables */
168 static const int cog_ycbcr_to_rgb_matrix_8bit_hdtv[] = {
170 298, -55, -136, 19681,
174 static const int cog_ycbcr_to_rgb_matrix_8bit_sdtv[] = {
176 298, -100, -208, 34707,
180 static const gint cog_rgb_to_ycbcr_matrix_8bit_hdtv[] = {
182 -26, -87, 112, 32768,
183 112, -102, -10, 32768,
186 static const gint cog_rgb_to_ycbcr_matrix_8bit_sdtv[] = {
188 -38, -74, 112, 32768,
189 112, -94, -18, 32768,
192 static const gint cog_ycbcr_sdtv_to_ycbcr_hdtv_matrix_8bit[] = {
193 256, -30, -53, 10600,
198 static const gint cog_ycbcr_hdtv_to_ycbcr_sdtv_matrix_8bit[] = {
204 #define DEFINE_ARGB_AYUV_FUNCTIONS(name, A, R, G, B) \
206 transform_##name##_ayuv (guint8 * data, gint size, const gint *matrix) \
213 memcpy (yc, matrix, 4 * sizeof (gint)); \
214 memcpy (uc, matrix + 4, 4 * sizeof (gint)); \
215 memcpy (vc, matrix + 8, 4 * sizeof (gint)); \
218 y = (data[R] * yc[0] + data[G] * yc[1] + data[B] * yc[2] + yc[3]) >> 8; \
219 u = (data[R] * uc[0] + data[G] * uc[1] + data[B] * uc[2] + uc[3]) >> 8; \
220 v = (data[R] * vc[0] + data[G] * vc[1] + data[B] * vc[2] + vc[3]) >> 8; \
233 transform_ayuv_##name (guint8 * data, gint size, const gint *matrix) \
240 memcpy (rc, matrix, 4 * sizeof (gint)); \
241 memcpy (gc, matrix + 4, 4 * sizeof (gint)); \
242 memcpy (bc, matrix + 8, 4 * sizeof (gint)); \
245 r = (data[1] * rc[0] + data[2] * rc[1] + data[3] * rc[2] + rc[3]) >> 8; \
246 g = (data[1] * gc[0] + data[2] * gc[1] + data[3] * gc[2] + gc[3]) >> 8; \
247 b = (data[1] * bc[0] + data[2] * bc[1] + data[3] * bc[2] + bc[3]) >> 8; \
250 data[R] = CLAMP (r, 0, 255); \
251 data[G] = CLAMP (g, 0, 255); \
252 data[B] = CLAMP (b, 0, 255); \
259 DEFINE_ARGB_AYUV_FUNCTIONS (rgba, 3, 0, 1, 2);
260 DEFINE_ARGB_AYUV_FUNCTIONS (bgra, 3, 2, 1, 0);
261 DEFINE_ARGB_AYUV_FUNCTIONS (argb, 0, 1, 2, 3);
262 DEFINE_ARGB_AYUV_FUNCTIONS (abgr, 0, 3, 2, 1);
265 transform_ayuv_ayuv (guint8 * data, gint size, const gint * matrix)
275 memcpy (yc, matrix, 4 * sizeof (gint));
276 memcpy (uc, matrix + 4, 4 * sizeof (gint));
277 memcpy (vc, matrix + 8, 4 * sizeof (gint));
280 y = (data[1] * yc[0] + data[2] * yc[1] + data[3] * yc[2] + yc[3]) >> 8;
281 u = (data[1] * uc[0] + data[2] * uc[1] + data[3] * uc[2] + uc[3]) >> 8;
282 v = (data[1] * vc[0] + data[2] * vc[1] + data[3] * vc[2] + vc[3]) >> 8;
295 transform_argb_bgra (guint8 * data, gint size, const gint * matrix)
314 #define transform_abgr_rgba transform_argb_bgra
317 transform_argb_abgr (guint8 * data, gint size, const gint * matrix)
326 /* data[0] = data[0]; */
336 #define transform_abgr_argb transform_argb_abgr
339 transform_rgba_bgra (guint8 * data, gint size, const gint * matrix)
348 /* data[3] = data[3] */ ;
358 #define transform_bgra_rgba transform_rgba_bgra
361 transform_argb_rgba (guint8 * data, gint size, const gint * matrix)
380 #define transform_abgr_bgra transform_argb_rgba
383 transform_bgra_argb (guint8 * data, gint size, const gint * matrix)
402 #define transform_rgba_abgr transform_bgra_argb
405 transform_rgba_argb (guint8 * data, gint size, const gint * matrix)
424 #define transform_bgra_abgr transform_rgba_argb
427 gst_alpha_color_set_caps (GstBaseTransform * btrans, GstCaps * incaps,
430 GstAlphaColor *alpha = GST_ALPHA_COLOR (btrans);
434 GstVideoFormat in_format, out_format;
436 gboolean in_sdtv, out_sdtv;
438 alpha->process = NULL;
439 alpha->matrix = NULL;
441 ret = gst_video_format_parse_caps (incaps, &in_format, &w, &h);
442 ret &= gst_video_format_parse_caps (outcaps, &out_format, &w2, &h2);
444 if (!ret || w != w2 || h != h2) {
445 GST_DEBUG_OBJECT (alpha, "incomplete or invalid caps!");
449 matrix = gst_video_parse_caps_color_matrix (incaps);
450 in_sdtv = matrix ? g_str_equal (matrix, "sdtv") : TRUE;
451 matrix = gst_video_parse_caps_color_matrix (outcaps);
452 out_sdtv = matrix ? g_str_equal (matrix, "sdtv") : TRUE;
454 alpha->in_format = in_format;
455 alpha->out_format = out_format;
459 switch (alpha->in_format) {
460 case GST_VIDEO_FORMAT_ARGB:
461 switch (alpha->out_format) {
462 case GST_VIDEO_FORMAT_ARGB:
463 alpha->process = NULL;
464 alpha->matrix = NULL;
466 case GST_VIDEO_FORMAT_BGRA:
467 alpha->process = transform_argb_bgra;
468 alpha->matrix = NULL;
470 case GST_VIDEO_FORMAT_ABGR:
471 alpha->process = transform_argb_abgr;
472 alpha->matrix = NULL;
474 case GST_VIDEO_FORMAT_RGBA:
475 alpha->process = transform_argb_rgba;
476 alpha->matrix = NULL;
478 case GST_VIDEO_FORMAT_AYUV:
479 alpha->process = transform_argb_ayuv;
481 out_sdtv ? cog_rgb_to_ycbcr_matrix_8bit_sdtv :
482 cog_rgb_to_ycbcr_matrix_8bit_hdtv;
485 alpha->process = NULL;
486 alpha->matrix = NULL;
490 case GST_VIDEO_FORMAT_BGRA:
491 switch (alpha->out_format) {
492 case GST_VIDEO_FORMAT_BGRA:
493 alpha->process = NULL;
494 alpha->matrix = NULL;
496 case GST_VIDEO_FORMAT_ARGB:
497 alpha->process = transform_bgra_argb;
498 alpha->matrix = NULL;
500 case GST_VIDEO_FORMAT_ABGR:
501 alpha->process = transform_bgra_abgr;
502 alpha->matrix = NULL;
504 case GST_VIDEO_FORMAT_RGBA:
505 alpha->process = transform_bgra_rgba;
506 alpha->matrix = NULL;
508 case GST_VIDEO_FORMAT_AYUV:
509 alpha->process = transform_bgra_ayuv;
511 out_sdtv ? cog_rgb_to_ycbcr_matrix_8bit_sdtv :
512 cog_rgb_to_ycbcr_matrix_8bit_hdtv;
515 alpha->process = NULL;
516 alpha->matrix = NULL;
520 case GST_VIDEO_FORMAT_ABGR:
521 switch (alpha->out_format) {
522 case GST_VIDEO_FORMAT_ABGR:
523 alpha->process = NULL;
524 alpha->matrix = NULL;
526 case GST_VIDEO_FORMAT_RGBA:
527 alpha->process = transform_abgr_rgba;
528 alpha->matrix = NULL;
530 case GST_VIDEO_FORMAT_ARGB:
531 alpha->process = transform_abgr_argb;
532 alpha->matrix = NULL;
534 case GST_VIDEO_FORMAT_BGRA:
535 alpha->process = transform_abgr_bgra;
536 alpha->matrix = NULL;
538 case GST_VIDEO_FORMAT_AYUV:
539 alpha->process = transform_abgr_ayuv;
541 out_sdtv ? cog_rgb_to_ycbcr_matrix_8bit_sdtv :
542 cog_rgb_to_ycbcr_matrix_8bit_hdtv;
545 alpha->process = NULL;
546 alpha->matrix = NULL;
550 case GST_VIDEO_FORMAT_RGBA:
551 switch (alpha->out_format) {
552 case GST_VIDEO_FORMAT_RGBA:
553 alpha->process = NULL;
554 alpha->matrix = NULL;
556 case GST_VIDEO_FORMAT_ARGB:
557 alpha->process = transform_rgba_argb;
558 alpha->matrix = NULL;
560 case GST_VIDEO_FORMAT_ABGR:
561 alpha->process = transform_rgba_abgr;
562 alpha->matrix = NULL;
564 case GST_VIDEO_FORMAT_BGRA:
565 alpha->process = transform_rgba_bgra;
566 alpha->matrix = NULL;
568 case GST_VIDEO_FORMAT_AYUV:
569 alpha->process = transform_rgba_ayuv;
571 out_sdtv ? cog_rgb_to_ycbcr_matrix_8bit_sdtv :
572 cog_rgb_to_ycbcr_matrix_8bit_hdtv;
575 alpha->process = NULL;
576 alpha->matrix = NULL;
580 case GST_VIDEO_FORMAT_AYUV:
581 switch (alpha->out_format) {
582 case GST_VIDEO_FORMAT_AYUV:
583 if (in_sdtv == out_sdtv) {
584 alpha->process = transform_ayuv_ayuv;
585 alpha->matrix = NULL;
587 alpha->process = transform_ayuv_ayuv;
589 out_sdtv ? cog_ycbcr_hdtv_to_ycbcr_sdtv_matrix_8bit :
590 cog_ycbcr_sdtv_to_ycbcr_hdtv_matrix_8bit;
593 case GST_VIDEO_FORMAT_ARGB:
594 alpha->process = transform_ayuv_argb;
596 in_sdtv ? cog_ycbcr_to_rgb_matrix_8bit_sdtv :
597 cog_ycbcr_to_rgb_matrix_8bit_hdtv;
599 case GST_VIDEO_FORMAT_BGRA:
600 alpha->process = transform_ayuv_bgra;
602 in_sdtv ? cog_ycbcr_to_rgb_matrix_8bit_sdtv :
603 cog_ycbcr_to_rgb_matrix_8bit_hdtv;
605 case GST_VIDEO_FORMAT_ABGR:
606 alpha->process = transform_ayuv_abgr;
608 in_sdtv ? cog_ycbcr_to_rgb_matrix_8bit_sdtv :
609 cog_ycbcr_to_rgb_matrix_8bit_hdtv;
611 case GST_VIDEO_FORMAT_RGBA:
612 alpha->process = transform_ayuv_rgba;
614 in_sdtv ? cog_ycbcr_to_rgb_matrix_8bit_sdtv :
615 cog_ycbcr_to_rgb_matrix_8bit_hdtv;
618 alpha->process = NULL;
619 alpha->matrix = NULL;
624 alpha->process = NULL;
625 alpha->matrix = NULL;
629 if (in_format == out_format && in_sdtv == out_sdtv)
630 gst_base_transform_set_passthrough (btrans, TRUE);
631 else if (!alpha->process)
638 gst_alpha_color_transform_ip (GstBaseTransform * btrans, GstBuffer * inbuf)
640 GstAlphaColor *alpha = GST_ALPHA_COLOR (btrans);
642 if (G_UNLIKELY (GST_BUFFER_SIZE (inbuf) != 4 * alpha->width * alpha->height)) {
643 GST_ERROR_OBJECT (alpha, "Invalid buffer size (was %u, expected %u)",
644 GST_BUFFER_SIZE (inbuf), alpha->width * alpha->height);
645 return GST_FLOW_ERROR;
648 if (gst_base_transform_is_passthrough (btrans))
651 if (G_UNLIKELY (!alpha->process)) {
652 GST_ERROR_OBJECT (alpha, "Not negotiated yet");
653 return GST_FLOW_NOT_NEGOTIATED;
656 /* Transform in place */
657 alpha->process (GST_BUFFER_DATA (inbuf), GST_BUFFER_SIZE (inbuf),
664 plugin_init (GstPlugin * plugin)
666 return gst_element_register (plugin, "alphacolor", GST_RANK_NONE,
667 GST_TYPE_ALPHA_COLOR);
670 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
673 "RGBA from/to AYUV colorspace conversion preserving the alpha channel",
674 plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)