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 G_DEFINE_TYPE (GstAlphaColor, gst_alpha_color, GST_TYPE_VIDEO_FILTER);
67 static GstCaps *gst_alpha_color_transform_caps (GstBaseTransform * btrans,
68 GstPadDirection direction, GstCaps * caps);
69 static gboolean gst_alpha_color_set_caps (GstBaseTransform * btrans,
70 GstCaps * incaps, GstCaps * outcaps);
71 static GstFlowReturn gst_alpha_color_transform_ip (GstBaseTransform * btrans,
75 gst_alpha_color_class_init (GstAlphaColorClass * klass)
77 GstElementClass *gstelement_class = (GstElementClass *) klass;
78 GstBaseTransformClass *gstbasetransform_class =
79 (GstBaseTransformClass *) klass;
81 GST_DEBUG_CATEGORY_INIT (alpha_color_debug, "alphacolor", 0,
82 "ARGB<->AYUV colorspace conversion preserving the alpha channels");
84 gst_element_class_set_details_simple (gstelement_class, "Alpha color filter",
85 "Filter/Converter/Video",
86 "ARGB from/to AYUV colorspace conversion preserving the alpha channel",
87 "Wim Taymans <wim@fluendo.com>");
89 gst_element_class_add_pad_template (gstelement_class,
90 gst_static_pad_template_get (&sink_template));
91 gst_element_class_add_pad_template (gstelement_class,
92 gst_static_pad_template_get (&src_template));
94 gstbasetransform_class->transform_caps =
95 GST_DEBUG_FUNCPTR (gst_alpha_color_transform_caps);
96 gstbasetransform_class->set_caps =
97 GST_DEBUG_FUNCPTR (gst_alpha_color_set_caps);
98 gstbasetransform_class->transform_ip =
99 GST_DEBUG_FUNCPTR (gst_alpha_color_transform_ip);
104 gst_alpha_color_init (GstAlphaColor * alpha)
106 GstBaseTransform *btrans = GST_BASE_TRANSFORM (alpha);
108 btrans->always_in_place = TRUE;
112 gst_alpha_color_transform_caps (GstBaseTransform * btrans,
113 GstPadDirection direction, GstCaps * caps)
115 const GstCaps *tmpl_caps = NULL;
116 GstCaps *result = NULL, *local_caps = NULL;
119 local_caps = gst_caps_new_empty ();
121 for (i = 0; i < gst_caps_get_size (caps); i++) {
122 GstStructure *structure =
123 gst_structure_copy (gst_caps_get_structure (caps, i));
125 /* Remove any specific parameter from the structure */
126 gst_structure_remove_field (structure, "format");
127 gst_structure_remove_field (structure, "endianness");
128 gst_structure_remove_field (structure, "depth");
129 gst_structure_remove_field (structure, "bpp");
130 gst_structure_remove_field (structure, "red_mask");
131 gst_structure_remove_field (structure, "green_mask");
132 gst_structure_remove_field (structure, "blue_mask");
133 gst_structure_remove_field (structure, "alpha_mask");
134 gst_structure_remove_field (structure, "color-matrix");
135 gst_structure_remove_field (structure, "chroma-site");
137 gst_structure_set_name (structure, "video/x-raw-rgb");
138 gst_caps_append_structure (local_caps, gst_structure_copy (structure));
139 gst_structure_set_name (structure, "video/x-raw-yuv");
140 gst_caps_append_structure (local_caps, structure);
143 /* Get the appropriate template */
144 if (direction == GST_PAD_SINK) {
145 tmpl_caps = gst_static_pad_template_get_caps (&src_template);
146 } else if (direction == GST_PAD_SRC) {
147 tmpl_caps = gst_static_pad_template_get_caps (&sink_template);
150 /* Intersect with our template caps */
151 result = gst_caps_intersect (local_caps, tmpl_caps);
153 gst_caps_unref (local_caps);
154 gst_caps_do_simplify (result);
156 GST_LOG_OBJECT (btrans, "transformed %" GST_PTR_FORMAT " to %" GST_PTR_FORMAT,
162 /* Generated by -bad/ext/cog/generate_tables */
163 static const int cog_ycbcr_to_rgb_matrix_8bit_hdtv[] = {
165 298, -55, -136, 19681,
169 static const int cog_ycbcr_to_rgb_matrix_8bit_sdtv[] = {
171 298, -100, -208, 34707,
175 static const gint cog_rgb_to_ycbcr_matrix_8bit_hdtv[] = {
177 -26, -87, 112, 32768,
178 112, -102, -10, 32768,
181 static const gint cog_rgb_to_ycbcr_matrix_8bit_sdtv[] = {
183 -38, -74, 112, 32768,
184 112, -94, -18, 32768,
187 static const gint cog_ycbcr_sdtv_to_ycbcr_hdtv_matrix_8bit[] = {
188 256, -30, -53, 10600,
193 static const gint cog_ycbcr_hdtv_to_ycbcr_sdtv_matrix_8bit[] = {
199 #define DEFINE_ARGB_AYUV_FUNCTIONS(name, A, R, G, B) \
201 transform_##name##_ayuv (guint8 * data, gint size, const gint *matrix) \
208 memcpy (yc, matrix, 4 * sizeof (gint)); \
209 memcpy (uc, matrix + 4, 4 * sizeof (gint)); \
210 memcpy (vc, matrix + 8, 4 * sizeof (gint)); \
213 y = (data[R] * yc[0] + data[G] * yc[1] + data[B] * yc[2] + yc[3]) >> 8; \
214 u = (data[R] * uc[0] + data[G] * uc[1] + data[B] * uc[2] + uc[3]) >> 8; \
215 v = (data[R] * vc[0] + data[G] * vc[1] + data[B] * vc[2] + vc[3]) >> 8; \
228 transform_ayuv_##name (guint8 * data, gint size, const gint *matrix) \
235 memcpy (rc, matrix, 4 * sizeof (gint)); \
236 memcpy (gc, matrix + 4, 4 * sizeof (gint)); \
237 memcpy (bc, matrix + 8, 4 * sizeof (gint)); \
240 r = (data[1] * rc[0] + data[2] * rc[1] + data[3] * rc[2] + rc[3]) >> 8; \
241 g = (data[1] * gc[0] + data[2] * gc[1] + data[3] * gc[2] + gc[3]) >> 8; \
242 b = (data[1] * bc[0] + data[2] * bc[1] + data[3] * bc[2] + bc[3]) >> 8; \
245 data[R] = CLAMP (r, 0, 255); \
246 data[G] = CLAMP (g, 0, 255); \
247 data[B] = CLAMP (b, 0, 255); \
254 DEFINE_ARGB_AYUV_FUNCTIONS (rgba, 3, 0, 1, 2);
255 DEFINE_ARGB_AYUV_FUNCTIONS (bgra, 3, 2, 1, 0);
256 DEFINE_ARGB_AYUV_FUNCTIONS (argb, 0, 1, 2, 3);
257 DEFINE_ARGB_AYUV_FUNCTIONS (abgr, 0, 3, 2, 1);
260 transform_ayuv_ayuv (guint8 * data, gint size, const gint * matrix)
270 memcpy (yc, matrix, 4 * sizeof (gint));
271 memcpy (uc, matrix + 4, 4 * sizeof (gint));
272 memcpy (vc, matrix + 8, 4 * sizeof (gint));
275 y = (data[1] * yc[0] + data[2] * yc[1] + data[3] * yc[2] + yc[3]) >> 8;
276 u = (data[1] * uc[0] + data[2] * uc[1] + data[3] * uc[2] + uc[3]) >> 8;
277 v = (data[1] * vc[0] + data[2] * vc[1] + data[3] * vc[2] + vc[3]) >> 8;
290 transform_argb_bgra (guint8 * data, gint size, const gint * matrix)
309 #define transform_abgr_rgba transform_argb_bgra
312 transform_argb_abgr (guint8 * data, gint size, const gint * matrix)
321 /* data[0] = data[0]; */
331 #define transform_abgr_argb transform_argb_abgr
334 transform_rgba_bgra (guint8 * data, gint size, const gint * matrix)
343 /* data[3] = data[3] */ ;
353 #define transform_bgra_rgba transform_rgba_bgra
356 transform_argb_rgba (guint8 * data, gint size, const gint * matrix)
375 #define transform_abgr_bgra transform_argb_rgba
378 transform_bgra_argb (guint8 * data, gint size, const gint * matrix)
397 #define transform_rgba_abgr transform_bgra_argb
400 transform_rgba_argb (guint8 * data, gint size, const gint * matrix)
419 #define transform_bgra_abgr transform_rgba_argb
422 gst_alpha_color_set_caps (GstBaseTransform * btrans, GstCaps * incaps,
425 GstAlphaColor *alpha = GST_ALPHA_COLOR (btrans);
429 GstVideoFormat in_format, out_format;
431 gboolean in_sdtv, out_sdtv;
433 alpha->process = NULL;
434 alpha->matrix = NULL;
436 ret = gst_video_format_parse_caps (incaps, &in_format, &w, &h);
437 ret &= gst_video_format_parse_caps (outcaps, &out_format, &w2, &h2);
439 if (!ret || w != w2 || h != h2) {
440 GST_DEBUG_OBJECT (alpha, "incomplete or invalid caps!");
444 matrix = gst_video_parse_caps_color_matrix (incaps);
445 in_sdtv = matrix ? g_str_equal (matrix, "sdtv") : TRUE;
446 matrix = gst_video_parse_caps_color_matrix (outcaps);
447 out_sdtv = matrix ? g_str_equal (matrix, "sdtv") : TRUE;
449 alpha->in_format = in_format;
450 alpha->out_format = out_format;
454 switch (alpha->in_format) {
455 case GST_VIDEO_FORMAT_ARGB:
456 switch (alpha->out_format) {
457 case GST_VIDEO_FORMAT_ARGB:
458 alpha->process = NULL;
459 alpha->matrix = NULL;
461 case GST_VIDEO_FORMAT_BGRA:
462 alpha->process = transform_argb_bgra;
463 alpha->matrix = NULL;
465 case GST_VIDEO_FORMAT_ABGR:
466 alpha->process = transform_argb_abgr;
467 alpha->matrix = NULL;
469 case GST_VIDEO_FORMAT_RGBA:
470 alpha->process = transform_argb_rgba;
471 alpha->matrix = NULL;
473 case GST_VIDEO_FORMAT_AYUV:
474 alpha->process = transform_argb_ayuv;
476 out_sdtv ? cog_rgb_to_ycbcr_matrix_8bit_sdtv :
477 cog_rgb_to_ycbcr_matrix_8bit_hdtv;
480 alpha->process = NULL;
481 alpha->matrix = NULL;
485 case GST_VIDEO_FORMAT_BGRA:
486 switch (alpha->out_format) {
487 case GST_VIDEO_FORMAT_BGRA:
488 alpha->process = NULL;
489 alpha->matrix = NULL;
491 case GST_VIDEO_FORMAT_ARGB:
492 alpha->process = transform_bgra_argb;
493 alpha->matrix = NULL;
495 case GST_VIDEO_FORMAT_ABGR:
496 alpha->process = transform_bgra_abgr;
497 alpha->matrix = NULL;
499 case GST_VIDEO_FORMAT_RGBA:
500 alpha->process = transform_bgra_rgba;
501 alpha->matrix = NULL;
503 case GST_VIDEO_FORMAT_AYUV:
504 alpha->process = transform_bgra_ayuv;
506 out_sdtv ? cog_rgb_to_ycbcr_matrix_8bit_sdtv :
507 cog_rgb_to_ycbcr_matrix_8bit_hdtv;
510 alpha->process = NULL;
511 alpha->matrix = NULL;
515 case GST_VIDEO_FORMAT_ABGR:
516 switch (alpha->out_format) {
517 case GST_VIDEO_FORMAT_ABGR:
518 alpha->process = NULL;
519 alpha->matrix = NULL;
521 case GST_VIDEO_FORMAT_RGBA:
522 alpha->process = transform_abgr_rgba;
523 alpha->matrix = NULL;
525 case GST_VIDEO_FORMAT_ARGB:
526 alpha->process = transform_abgr_argb;
527 alpha->matrix = NULL;
529 case GST_VIDEO_FORMAT_BGRA:
530 alpha->process = transform_abgr_bgra;
531 alpha->matrix = NULL;
533 case GST_VIDEO_FORMAT_AYUV:
534 alpha->process = transform_abgr_ayuv;
536 out_sdtv ? cog_rgb_to_ycbcr_matrix_8bit_sdtv :
537 cog_rgb_to_ycbcr_matrix_8bit_hdtv;
540 alpha->process = NULL;
541 alpha->matrix = NULL;
545 case GST_VIDEO_FORMAT_RGBA:
546 switch (alpha->out_format) {
547 case GST_VIDEO_FORMAT_RGBA:
548 alpha->process = NULL;
549 alpha->matrix = NULL;
551 case GST_VIDEO_FORMAT_ARGB:
552 alpha->process = transform_rgba_argb;
553 alpha->matrix = NULL;
555 case GST_VIDEO_FORMAT_ABGR:
556 alpha->process = transform_rgba_abgr;
557 alpha->matrix = NULL;
559 case GST_VIDEO_FORMAT_BGRA:
560 alpha->process = transform_rgba_bgra;
561 alpha->matrix = NULL;
563 case GST_VIDEO_FORMAT_AYUV:
564 alpha->process = transform_rgba_ayuv;
566 out_sdtv ? cog_rgb_to_ycbcr_matrix_8bit_sdtv :
567 cog_rgb_to_ycbcr_matrix_8bit_hdtv;
570 alpha->process = NULL;
571 alpha->matrix = NULL;
575 case GST_VIDEO_FORMAT_AYUV:
576 switch (alpha->out_format) {
577 case GST_VIDEO_FORMAT_AYUV:
578 if (in_sdtv == out_sdtv) {
579 alpha->process = transform_ayuv_ayuv;
580 alpha->matrix = NULL;
582 alpha->process = transform_ayuv_ayuv;
584 out_sdtv ? cog_ycbcr_hdtv_to_ycbcr_sdtv_matrix_8bit :
585 cog_ycbcr_sdtv_to_ycbcr_hdtv_matrix_8bit;
588 case GST_VIDEO_FORMAT_ARGB:
589 alpha->process = transform_ayuv_argb;
591 in_sdtv ? cog_ycbcr_to_rgb_matrix_8bit_sdtv :
592 cog_ycbcr_to_rgb_matrix_8bit_hdtv;
594 case GST_VIDEO_FORMAT_BGRA:
595 alpha->process = transform_ayuv_bgra;
597 in_sdtv ? cog_ycbcr_to_rgb_matrix_8bit_sdtv :
598 cog_ycbcr_to_rgb_matrix_8bit_hdtv;
600 case GST_VIDEO_FORMAT_ABGR:
601 alpha->process = transform_ayuv_abgr;
603 in_sdtv ? cog_ycbcr_to_rgb_matrix_8bit_sdtv :
604 cog_ycbcr_to_rgb_matrix_8bit_hdtv;
606 case GST_VIDEO_FORMAT_RGBA:
607 alpha->process = transform_ayuv_rgba;
609 in_sdtv ? cog_ycbcr_to_rgb_matrix_8bit_sdtv :
610 cog_ycbcr_to_rgb_matrix_8bit_hdtv;
613 alpha->process = NULL;
614 alpha->matrix = NULL;
619 alpha->process = NULL;
620 alpha->matrix = NULL;
624 if (in_format == out_format && in_sdtv == out_sdtv)
625 gst_base_transform_set_passthrough (btrans, TRUE);
626 else if (!alpha->process)
633 gst_alpha_color_transform_ip (GstBaseTransform * btrans, GstBuffer * inbuf)
635 GstAlphaColor *alpha = GST_ALPHA_COLOR (btrans);
639 if (gst_base_transform_is_passthrough (btrans))
642 if (G_UNLIKELY (!alpha->process)) {
643 GST_ERROR_OBJECT (alpha, "Not negotiated yet");
644 return GST_FLOW_NOT_NEGOTIATED;
647 data = gst_buffer_map (inbuf, &size, NULL, GST_MAP_READWRITE);
649 if (G_UNLIKELY (size != 4 * alpha->width * alpha->height)) {
650 GST_ERROR_OBJECT (alpha, "Invalid buffer size (was %u, expected %u)",
651 size, alpha->width * alpha->height);
652 gst_buffer_unmap (inbuf, data, size);
653 return GST_FLOW_ERROR;
656 /* Transform in place */
657 alpha->process (data, size, alpha->matrix);
659 gst_buffer_unmap (inbuf, data, size);
665 plugin_init (GstPlugin * plugin)
667 return gst_element_register (plugin, "alphacolor", GST_RANK_NONE,
668 GST_TYPE_ALPHA_COLOR);
671 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
674 "RGBA from/to AYUV colorspace conversion preserving the alpha channel",
675 plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)