1 /* Video compositor plugin
2 * Copyright (C) 2004, 2008 Wim Taymans <wim@fluendo.com>
3 * Copyright (C) 2010 Sebastian Dröge <sebastian.droege@collabora.co.uk>
4 * Copyright (C) 2014 Mathieu Duponchelle <mathieu.duponchelle@opencreed.com>
5 * Copyright (C) 2014 Thibault Saunier <tsaunier@gnome.org>
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
17 * You should have received a copy of the GNU Library General Public
18 * License along with this library; if not, write to the
19 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
20 * Boston, MA 02110-1301, USA.
24 * SECTION:element-compositor
27 * Compositor can accept AYUV, VUYA, ARGB and BGRA video streams. For each of the requested
28 * sink pads it will compare the incoming geometry and framerate to define the
29 * output parameters. Indeed output video frames will have the geometry of the
30 * biggest incoming video stream and the framerate of the fastest incoming one.
32 * Compositor will do colorspace conversion.
34 * Individual parameters for each input stream can be configured on the
37 * * "xpos": The x-coordinate position of the top-left corner of the picture (#gint)
38 * * "ypos": The y-coordinate position of the top-left corner of the picture (#gint)
39 * * "width": The width of the picture; the input will be scaled if necessary (#gint)
40 * * "height": The height of the picture; the input will be scaled if necessary (#gint)
41 * * "alpha": The transparency of the picture; between 0.0 and 1.0. The blending
42 * is a simple copy when fully-transparent (0.0) and fully-opaque (1.0). (#gdouble)
43 * * "zorder": The z-order position of the picture in the composition (#guint)
48 * videotestsrc pattern=1 ! \
49 * video/x-raw,format=AYUV,framerate=\(fraction\)10/1,width=100,height=100 ! \
50 * videobox border-alpha=0 top=-70 bottom=-70 right=-220 ! \
51 * compositor name=comp sink_0::alpha=0.7 sink_1::alpha=0.5 ! \
52 * videoconvert ! xvimagesink \
54 * video/x-raw,format=AYUV,framerate=\(fraction\)5/1,width=320,height=240 ! comp.
55 * ]| A pipeline to demonstrate compositor used together with videobox.
56 * This should show a 320x240 pixels video test source with some transparency
57 * showing the background checker pattern. Another video test source with just
58 * the snow pattern of 100x100 pixels is overlaid on top of the first one on
59 * the left vertically centered with a small transparency showing the first
60 * video test source behind and the checker pattern under it. Note that the
61 * framerate of the output video is 10 frames per second.
63 * gst-launch-1.0 videotestsrc pattern=1 ! \
64 * video/x-raw, framerate=\(fraction\)10/1, width=100, height=100 ! \
65 * compositor name=comp ! videoconvert ! ximagesink \
67 * video/x-raw, framerate=\(fraction\)5/1, width=320, height=240 ! comp.
68 * ]| A pipeline to demonstrate bgra comping. (This does not demonstrate alpha blending).
70 * gst-launch-1.0 videotestsrc pattern=1 ! \
71 * video/x-raw,format =I420, framerate=\(fraction\)10/1, width=100, height=100 ! \
72 * compositor name=comp ! videoconvert ! ximagesink \
74 * video/x-raw,format=I420, framerate=\(fraction\)5/1, width=320, height=240 ! comp.
75 * ]| A pipeline to test I420
77 * gst-launch-1.0 compositor name=comp sink_1::alpha=0.5 sink_1::xpos=50 sink_1::ypos=50 ! \
78 * videoconvert ! ximagesink \
79 * videotestsrc pattern=snow timestamp-offset=3000000000 ! \
80 * "video/x-raw,format=AYUV,width=640,height=480,framerate=(fraction)30/1" ! \
81 * timeoverlay ! queue2 ! comp. \
82 * videotestsrc pattern=smpte ! \
83 * "video/x-raw,format=AYUV,width=800,height=600,framerate=(fraction)10/1" ! \
84 * timeoverlay ! queue2 ! comp.
85 * ]| A pipeline to demonstrate synchronized compositing (the second stream starts after 3 seconds)
95 #include "compositor.h"
98 #define orc_memset memset
100 #include <orc/orcfunctions.h>
103 GST_DEBUG_CATEGORY_STATIC (gst_compositor_debug);
104 #define GST_CAT_DEFAULT gst_compositor_debug
106 #define FORMATS " { AYUV, VUYA, BGRA, ARGB, RGBA, ABGR, Y444, Y42B, YUY2, UYVY, "\
107 " YVYU, I420, YV12, NV12, NV21, Y41B, RGB, BGR, xRGB, xBGR, "\
110 static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
113 GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE (FORMATS))
116 static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink_%u",
119 GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE (GST_VIDEO_FORMATS_ALL))
122 static void gst_compositor_child_proxy_init (gpointer g_iface,
123 gpointer iface_data);
125 #define GST_TYPE_COMPOSITOR_OPERATOR (gst_compositor_operator_get_type())
127 gst_compositor_operator_get_type (void)
129 static GType compositor_operator_type = 0;
131 static const GEnumValue compositor_operator[] = {
132 {COMPOSITOR_OPERATOR_SOURCE, "Source", "source"},
133 {COMPOSITOR_OPERATOR_OVER, "Over", "over"},
134 {COMPOSITOR_OPERATOR_ADD, "Add", "add"},
138 if (!compositor_operator_type) {
139 compositor_operator_type =
140 g_enum_register_static ("GstCompositorOperator", compositor_operator);
142 return compositor_operator_type;
145 #define GST_TYPE_COMPOSITOR_BACKGROUND (gst_compositor_background_get_type())
147 gst_compositor_background_get_type (void)
149 static GType compositor_background_type = 0;
151 static const GEnumValue compositor_background[] = {
152 {COMPOSITOR_BACKGROUND_CHECKER, "Checker pattern", "checker"},
153 {COMPOSITOR_BACKGROUND_BLACK, "Black", "black"},
154 {COMPOSITOR_BACKGROUND_WHITE, "White", "white"},
155 {COMPOSITOR_BACKGROUND_TRANSPARENT,
156 "Transparent Background to enable further compositing", "transparent"},
160 if (!compositor_background_type) {
161 compositor_background_type =
162 g_enum_register_static ("GstCompositorBackground",
163 compositor_background);
165 return compositor_background_type;
168 #define GST_TYPE_COMPOSITOR_SIZING_POLICY (gst_compositor_sizing_policy_get_type())
170 gst_compositor_sizing_policy_get_type (void)
172 static GType sizing_policy_type = 0;
174 static const GEnumValue sizing_polices[] = {
175 {COMPOSITOR_SIZING_POLICY_NONE,
176 "None: Image is scaled to fill configured destination rectangle without "
177 "padding or keeping the aspect ratio", "none"},
178 {COMPOSITOR_SIZING_POLICY_KEEP_ASPECT_RATIO,
179 "Keep Aspect Ratio: Image is scaled to fit destination rectangle "
180 "specified by GstCompositorPad:{xpos, ypos, width, height} "
181 "with preserved aspect ratio. Resulting image will be centered in "
182 "the destination rectangle with padding if necessary",
183 "keep-aspect-ratio"},
187 if (!sizing_policy_type) {
189 g_enum_register_static ("GstCompositorSizingPolicy", sizing_polices);
191 return sizing_policy_type;
194 #define DEFAULT_PAD_XPOS 0
195 #define DEFAULT_PAD_YPOS 0
196 #define DEFAULT_PAD_WIDTH -1
197 #define DEFAULT_PAD_HEIGHT -1
198 #define DEFAULT_PAD_ALPHA 1.0
199 #define DEFAULT_PAD_OPERATOR COMPOSITOR_OPERATOR_OVER
200 #define DEFAULT_PAD_SIZING_POLICY COMPOSITOR_SIZING_POLICY_NONE
211 PROP_PAD_SIZING_POLICY,
214 G_DEFINE_TYPE (GstCompositorPad, gst_compositor_pad,
215 GST_TYPE_VIDEO_AGGREGATOR_PARALLEL_CONVERT_PAD);
218 gst_compositor_pad_get_property (GObject * object, guint prop_id,
219 GValue * value, GParamSpec * pspec)
221 GstCompositorPad *pad = GST_COMPOSITOR_PAD (object);
225 g_value_set_int (value, pad->xpos);
228 g_value_set_int (value, pad->ypos);
231 g_value_set_int (value, pad->width);
233 case PROP_PAD_HEIGHT:
234 g_value_set_int (value, pad->height);
237 g_value_set_double (value, pad->alpha);
239 case PROP_PAD_OPERATOR:
240 g_value_set_enum (value, pad->op);
242 case PROP_PAD_SIZING_POLICY:
243 g_value_set_enum (value, pad->sizing_policy);
246 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
252 gst_compositor_pad_set_property (GObject * object, guint prop_id,
253 const GValue * value, GParamSpec * pspec)
255 GstCompositorPad *pad = GST_COMPOSITOR_PAD (object);
259 pad->xpos = g_value_get_int (value);
262 pad->ypos = g_value_get_int (value);
265 pad->width = g_value_get_int (value);
266 gst_video_aggregator_convert_pad_update_conversion_info
267 (GST_VIDEO_AGGREGATOR_CONVERT_PAD (pad));
269 case PROP_PAD_HEIGHT:
270 pad->height = g_value_get_int (value);
271 gst_video_aggregator_convert_pad_update_conversion_info
272 (GST_VIDEO_AGGREGATOR_CONVERT_PAD (pad));
275 pad->alpha = g_value_get_double (value);
277 case PROP_PAD_OPERATOR:
278 pad->op = g_value_get_enum (value);
279 gst_video_aggregator_pad_set_needs_alpha (GST_VIDEO_AGGREGATOR_PAD (pad),
280 pad->op == COMPOSITOR_OPERATOR_ADD);
282 case PROP_PAD_SIZING_POLICY:
283 pad->sizing_policy = g_value_get_enum (value);
284 gst_video_aggregator_convert_pad_update_conversion_info
285 (GST_VIDEO_AGGREGATOR_CONVERT_PAD (pad));
288 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
294 _mixer_pad_get_output_size (GstCompositor * comp, GstCompositorPad * comp_pad,
295 gint out_par_n, gint out_par_d, gint * width, gint * height,
296 gint * x_offset, gint * y_offset)
298 GstVideoAggregatorPad *vagg_pad = GST_VIDEO_AGGREGATOR_PAD (comp_pad);
299 gint pad_width, pad_height;
307 /* FIXME: Anything better we can do here? */
308 if (!vagg_pad->info.finfo
309 || vagg_pad->info.finfo->format == GST_VIDEO_FORMAT_UNKNOWN) {
310 GST_DEBUG_OBJECT (comp_pad, "Have no caps yet");
314 if (comp->zero_size_is_unscaled) {
317 0 ? GST_VIDEO_INFO_WIDTH (&vagg_pad->info) : comp_pad->width;
320 0 ? GST_VIDEO_INFO_HEIGHT (&vagg_pad->info) : comp_pad->height;
324 0 ? GST_VIDEO_INFO_WIDTH (&vagg_pad->info) : comp_pad->width;
327 0 ? GST_VIDEO_INFO_HEIGHT (&vagg_pad->info) : comp_pad->height;
330 if (pad_width == 0 || pad_height == 0)
333 if (!gst_video_calculate_display_ratio (&dar_n, &dar_d, pad_width, pad_height,
334 GST_VIDEO_INFO_PAR_N (&vagg_pad->info),
335 GST_VIDEO_INFO_PAR_D (&vagg_pad->info), out_par_n, out_par_d)) {
336 GST_WARNING_OBJECT (comp_pad, "Cannot calculate display aspect ratio");
340 GST_LOG_OBJECT (comp_pad, "scaling %ux%u by %u/%u (%u/%u / %u/%u)", pad_width,
341 pad_height, dar_n, dar_d, GST_VIDEO_INFO_PAR_N (&vagg_pad->info),
342 GST_VIDEO_INFO_PAR_D (&vagg_pad->info), out_par_n, out_par_d);
344 switch (comp_pad->sizing_policy) {
345 case COMPOSITOR_SIZING_POLICY_NONE:
346 /* Pick either height or width, whichever is an integer multiple of the
347 * display aspect ratio. However, prefer preserving the height to account
348 * for interlaced video. */
349 if (pad_height % dar_n == 0) {
350 pad_width = gst_util_uint64_scale_int (pad_height, dar_n, dar_d);
351 } else if (pad_width % dar_d == 0) {
352 pad_height = gst_util_uint64_scale_int (pad_width, dar_d, dar_n);
354 pad_width = gst_util_uint64_scale_int (pad_height, dar_n, dar_d);
357 case COMPOSITOR_SIZING_POLICY_KEEP_ASPECT_RATIO:
359 gint from_dar_n, from_dar_d, to_dar_n, to_dar_d, num, den;
361 /* Calculate DAR again with actual video size */
362 if (!gst_util_fraction_multiply (GST_VIDEO_INFO_WIDTH (&vagg_pad->info),
363 GST_VIDEO_INFO_HEIGHT (&vagg_pad->info),
364 GST_VIDEO_INFO_PAR_N (&vagg_pad->info),
365 GST_VIDEO_INFO_PAR_D (&vagg_pad->info), &from_dar_n,
367 from_dar_n = from_dar_d = -1;
370 if (!gst_util_fraction_multiply (pad_width, pad_height,
371 out_par_n, out_par_d, &to_dar_n, &to_dar_d)) {
372 to_dar_n = to_dar_d = -1;
375 if (from_dar_n != to_dar_n || from_dar_d != to_dar_d) {
376 /* Calculate new output resolution */
377 if (from_dar_n != -1 && from_dar_d != -1
378 && gst_util_fraction_multiply (from_dar_n, from_dar_d,
379 out_par_d, out_par_n, &num, &den)) {
380 GstVideoRectangle src_rect, dst_rect, rst_rect;
382 src_rect.h = gst_util_uint64_scale_int (pad_width, den, num);
383 if (src_rect.h == 0) {
389 src_rect.x = src_rect.y = 0;
390 src_rect.w = pad_width;
392 dst_rect.x = dst_rect.y = 0;
393 dst_rect.w = pad_width;
394 dst_rect.h = pad_height;
396 /* Scale rect to be centered in destination rect */
397 gst_video_center_rect (&src_rect, &dst_rect, &rst_rect, TRUE);
399 GST_LOG_OBJECT (comp_pad,
400 "Re-calculated size %dx%d -> %dx%d (x-offset %d, y-offset %d)",
401 pad_width, pad_height, rst_rect.w, rst_rect.h, rst_rect.x,
404 *x_offset = rst_rect.x;
405 *y_offset = rst_rect.y;
406 pad_width = rst_rect.w;
407 pad_height = rst_rect.h;
409 GST_WARNING_OBJECT (comp_pad, "Failed to calculate output size");
422 *height = pad_height;
425 /* Test whether rectangle2 contains rectangle 1 (geometrically) */
427 is_rectangle_contained (const GstVideoRectangle rect1,
428 const GstVideoRectangle rect2)
430 if ((rect2.x <= rect1.x) && (rect2.y <= rect1.y) &&
431 ((rect2.x + rect2.w) >= (rect1.x + rect1.w)) &&
432 ((rect2.y + rect2.h) >= (rect1.y + rect1.h)))
437 static GstVideoRectangle
438 clamp_rectangle (gint x, gint y, gint w, gint h, gint outer_width,
443 GstVideoRectangle clamped;
445 /* Clamp the x/y coordinates of this frame to the output boundaries to cover
446 * the case where (say, with negative xpos/ypos or w/h greater than the output
447 * size) the non-obscured portion of the frame could be outside the bounds of
448 * the video itself and hence not visible at all */
449 clamped.x = CLAMP (x, 0, outer_width);
450 clamped.y = CLAMP (y, 0, outer_height);
451 clamped.w = CLAMP (x2, 0, outer_width) - clamped.x;
452 clamped.h = CLAMP (y2, 0, outer_height) - clamped.y;
457 /* Call this with the lock taken */
459 _pad_obscures_rectangle (GstVideoAggregator * vagg, GstVideoAggregatorPad * pad,
460 const GstVideoRectangle rect)
462 GstVideoRectangle pad_rect;
463 GstCompositorPad *cpad = GST_COMPOSITOR_PAD (pad);
464 GstStructure *converter_config = NULL;
465 gboolean fill_border = TRUE;
466 guint32 border_argb = 0xff000000;
467 gint x_offset, y_offset;
469 /* No buffer to obscure the rectangle with */
470 if (!gst_video_aggregator_pad_has_current_buffer (pad))
473 /* Can't obscure if we introduce alpha or if the format has an alpha
474 * component as we'd have to inspect every pixel to know if the frame is
475 * opaque, so assume it doesn't obscure
477 if (cpad->alpha != 1.0 || GST_VIDEO_INFO_HAS_ALPHA (&pad->info))
480 /* If a converter-config is set and it is either configured to not fill any
481 * borders, or configured to use a non-opaque color, then we have to handle
482 * the pad as potentially containing transparency */
483 g_object_get (pad, "converter-config", &converter_config, NULL);
484 if (converter_config) {
485 gst_structure_get (converter_config, GST_VIDEO_CONVERTER_OPT_BORDER_ARGB,
486 G_TYPE_UINT, &border_argb, NULL);
487 gst_structure_get (converter_config, GST_VIDEO_CONVERTER_OPT_FILL_BORDER,
488 G_TYPE_BOOLEAN, &fill_border, NULL);
490 gst_clear_structure (&converter_config);
491 if (!fill_border || (border_argb & 0xff000000) != 0xff000000)
494 pad_rect.x = cpad->xpos;
495 pad_rect.y = cpad->ypos;
496 /* Handle pixel and display aspect ratios to find the actual size */
497 _mixer_pad_get_output_size (GST_COMPOSITOR (vagg), cpad,
498 GST_VIDEO_INFO_PAR_N (&vagg->info), GST_VIDEO_INFO_PAR_D (&vagg->info),
499 &(pad_rect.w), &(pad_rect.h), &x_offset, &y_offset);
500 pad_rect.x += x_offset;
501 pad_rect.y += y_offset;
503 if (!is_rectangle_contained (rect, pad_rect))
506 GST_DEBUG_OBJECT (pad, "Pad %s %ix%i@(%i,%i) obscures rect %ix%i@(%i,%i)",
507 GST_PAD_NAME (pad), pad_rect.w, pad_rect.h, pad_rect.x, pad_rect.y,
508 rect.w, rect.h, rect.x, rect.y);
514 gst_compositor_pad_prepare_frame_start (GstVideoAggregatorPad * pad,
515 GstVideoAggregator * vagg, GstBuffer * buffer,
516 GstVideoFrame * prepared_frame)
518 GstCompositorPad *cpad = GST_COMPOSITOR_PAD (pad);
520 gboolean frame_obscured = FALSE;
522 /* The rectangle representing this frame, clamped to the video's boundaries.
523 * Due to the clamping, this is different from the frame width/height above. */
524 GstVideoRectangle frame_rect;
526 /* There's three types of width/height here:
527 * 1. GST_VIDEO_FRAME_WIDTH/HEIGHT:
528 * The frame width/height (same as pad->info.height/width;
529 * see gst_video_frame_map())
530 * 2. cpad->width/height:
531 * The optional pad property for scaling the frame (if zero, the video is
533 * 3. conversion_info.width/height:
534 * Equal to cpad->width/height if it's set, otherwise it's the pad
535 * width/height. See ->set_info()
538 _mixer_pad_get_output_size (GST_COMPOSITOR (vagg), cpad,
539 GST_VIDEO_INFO_PAR_N (&vagg->info), GST_VIDEO_INFO_PAR_D (&vagg->info),
540 &width, &height, &cpad->x_offset, &cpad->y_offset);
542 if (cpad->alpha == 0.0) {
543 GST_DEBUG_OBJECT (pad, "Pad has alpha 0.0, not converting frame");
547 frame_rect = clamp_rectangle (cpad->xpos + cpad->x_offset,
548 cpad->ypos + cpad->y_offset, width, height,
549 GST_VIDEO_INFO_WIDTH (&vagg->info), GST_VIDEO_INFO_HEIGHT (&vagg->info));
551 if (frame_rect.w == 0 || frame_rect.h == 0) {
552 GST_DEBUG_OBJECT (pad, "Resulting frame is zero-width or zero-height "
553 "(w: %i, h: %i), skipping", frame_rect.w, frame_rect.h);
557 GST_OBJECT_LOCK (vagg);
558 /* Check if this frame is obscured by a higher-zorder frame
559 * TODO: Also skip a frame if it's obscured by a combination of
560 * higher-zorder frames */
561 l = g_list_find (GST_ELEMENT (vagg)->sinkpads, pad);
562 /* The pad might've just been removed */
565 for (; l; l = l->next) {
566 if (_pad_obscures_rectangle (vagg, l->data, frame_rect)) {
567 frame_obscured = TRUE;
571 GST_OBJECT_UNLOCK (vagg);
576 GST_VIDEO_AGGREGATOR_PAD_CLASS
577 (gst_compositor_pad_parent_class)->prepare_frame_start (pad, vagg, buffer,
582 gst_compositor_pad_create_conversion_info (GstVideoAggregatorConvertPad * pad,
583 GstVideoAggregator * vagg, GstVideoInfo * conversion_info)
585 GstCompositorPad *cpad = GST_COMPOSITOR_PAD (pad);
587 gint x_offset, y_offset;
589 GST_VIDEO_AGGREGATOR_CONVERT_PAD_CLASS
590 (gst_compositor_pad_parent_class)->create_conversion_info (pad, vagg,
592 if (!conversion_info->finfo)
595 _mixer_pad_get_output_size (GST_COMPOSITOR (vagg), cpad,
596 GST_VIDEO_INFO_PAR_N (&vagg->info), GST_VIDEO_INFO_PAR_D (&vagg->info),
597 &width, &height, &x_offset, &y_offset);
599 /* The only thing that can change here is the width
600 * and height, otherwise set_info would've been called */
601 if (GST_VIDEO_INFO_WIDTH (conversion_info) != width ||
602 GST_VIDEO_INFO_HEIGHT (conversion_info) != height) {
603 GstVideoInfo tmp_info;
605 /* Initialize with the wanted video format and our original width and
606 * height as we don't want to rescale. Then copy over the wanted
607 * colorimetry, and chroma-site and our current pixel-aspect-ratio
608 * and other relevant fields.
610 gst_video_info_set_format (&tmp_info,
611 GST_VIDEO_INFO_FORMAT (conversion_info), width, height);
612 tmp_info.chroma_site = conversion_info->chroma_site;
613 tmp_info.colorimetry = conversion_info->colorimetry;
614 tmp_info.par_n = conversion_info->par_n;
615 tmp_info.par_d = conversion_info->par_d;
616 tmp_info.fps_n = conversion_info->fps_n;
617 tmp_info.fps_d = conversion_info->fps_d;
618 tmp_info.flags = conversion_info->flags;
619 tmp_info.interlace_mode = conversion_info->interlace_mode;
621 *conversion_info = tmp_info;
626 gst_compositor_pad_class_init (GstCompositorPadClass * klass)
628 GObjectClass *gobject_class = (GObjectClass *) klass;
629 GstVideoAggregatorPadClass *vaggpadclass =
630 (GstVideoAggregatorPadClass *) klass;
631 GstVideoAggregatorConvertPadClass *vaggcpadclass =
632 (GstVideoAggregatorConvertPadClass *) klass;
634 gobject_class->set_property = gst_compositor_pad_set_property;
635 gobject_class->get_property = gst_compositor_pad_get_property;
637 g_object_class_install_property (gobject_class, PROP_PAD_XPOS,
638 g_param_spec_int ("xpos", "X Position", "X Position of the picture",
639 G_MININT, G_MAXINT, DEFAULT_PAD_XPOS,
640 G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
641 g_object_class_install_property (gobject_class, PROP_PAD_YPOS,
642 g_param_spec_int ("ypos", "Y Position", "Y Position of the picture",
643 G_MININT, G_MAXINT, DEFAULT_PAD_YPOS,
644 G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
645 g_object_class_install_property (gobject_class, PROP_PAD_WIDTH,
646 g_param_spec_int ("width", "Width", "Width of the picture",
647 G_MININT, G_MAXINT, DEFAULT_PAD_WIDTH,
648 G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
649 g_object_class_install_property (gobject_class, PROP_PAD_HEIGHT,
650 g_param_spec_int ("height", "Height", "Height of the picture",
651 G_MININT, G_MAXINT, DEFAULT_PAD_HEIGHT,
652 G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
653 g_object_class_install_property (gobject_class, PROP_PAD_ALPHA,
654 g_param_spec_double ("alpha", "Alpha", "Alpha of the picture", 0.0, 1.0,
656 G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
657 g_object_class_install_property (gobject_class, PROP_PAD_OPERATOR,
658 g_param_spec_enum ("operator", "Operator",
659 "Blending operator to use for blending this pad over the previous ones",
660 GST_TYPE_COMPOSITOR_OPERATOR, DEFAULT_PAD_OPERATOR,
661 G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
664 * GstCompositorPad:sizing-policy:
666 * Specifies sizing policy to use. Depending on selected sizing policy,
667 * scaled image might not fully cover the configured target rectangle area
668 * (e.g., "keep-aspect-ratio"). In that case, any uncovered area will be
669 * filled with background unless the uncovered area is drawn by other image.
673 g_object_class_install_property (gobject_class, PROP_PAD_SIZING_POLICY,
674 g_param_spec_enum ("sizing-policy", "Sizing policy",
675 "Sizing policy to use for image scaling",
676 GST_TYPE_COMPOSITOR_SIZING_POLICY, DEFAULT_PAD_SIZING_POLICY,
677 G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
679 vaggpadclass->prepare_frame_start =
680 GST_DEBUG_FUNCPTR (gst_compositor_pad_prepare_frame_start);
682 vaggcpadclass->create_conversion_info =
683 GST_DEBUG_FUNCPTR (gst_compositor_pad_create_conversion_info);
685 gst_type_mark_as_plugin_api (GST_TYPE_COMPOSITOR_SIZING_POLICY, 0);
689 gst_compositor_pad_init (GstCompositorPad * compo_pad)
691 compo_pad->xpos = DEFAULT_PAD_XPOS;
692 compo_pad->ypos = DEFAULT_PAD_YPOS;
693 compo_pad->alpha = DEFAULT_PAD_ALPHA;
694 compo_pad->op = DEFAULT_PAD_OPERATOR;
695 compo_pad->width = DEFAULT_PAD_WIDTH;
696 compo_pad->height = DEFAULT_PAD_HEIGHT;
697 compo_pad->sizing_policy = DEFAULT_PAD_SIZING_POLICY;
702 #define DEFAULT_BACKGROUND COMPOSITOR_BACKGROUND_CHECKER
703 #define DEFAULT_ZERO_SIZE_IS_UNSCALED TRUE
708 PROP_ZERO_SIZE_IS_UNSCALED,
712 gst_compositor_get_property (GObject * object,
713 guint prop_id, GValue * value, GParamSpec * pspec)
715 GstCompositor *self = GST_COMPOSITOR (object);
718 case PROP_BACKGROUND:
719 g_value_set_enum (value, self->background);
721 case PROP_ZERO_SIZE_IS_UNSCALED:
722 g_value_set_boolean (value, self->zero_size_is_unscaled);
725 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
731 gst_compositor_set_property (GObject * object,
732 guint prop_id, const GValue * value, GParamSpec * pspec)
734 GstCompositor *self = GST_COMPOSITOR (object);
737 case PROP_BACKGROUND:
738 self->background = g_value_get_enum (value);
740 case PROP_ZERO_SIZE_IS_UNSCALED:
741 self->zero_size_is_unscaled = g_value_get_boolean (value);
744 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
749 #define gst_compositor_parent_class parent_class
750 G_DEFINE_TYPE_WITH_CODE (GstCompositor, gst_compositor,
751 GST_TYPE_VIDEO_AGGREGATOR, G_IMPLEMENT_INTERFACE (GST_TYPE_CHILD_PROXY,
752 gst_compositor_child_proxy_init));
753 GST_ELEMENT_REGISTER_DEFINE (compositor, "compositor", GST_RANK_PRIMARY + 1,
754 GST_TYPE_COMPOSITOR);
757 set_functions (GstCompositor * self, const GstVideoInfo * info)
759 gboolean ret = FALSE;
762 self->overlay = NULL;
763 self->fill_checker = NULL;
764 self->fill_color = NULL;
766 switch (GST_VIDEO_INFO_FORMAT (info)) {
767 case GST_VIDEO_FORMAT_AYUV:
768 self->blend = gst_compositor_blend_ayuv;
769 self->overlay = gst_compositor_overlay_ayuv;
770 self->fill_checker = gst_compositor_fill_checker_ayuv;
771 self->fill_color = gst_compositor_fill_color_ayuv;
774 case GST_VIDEO_FORMAT_VUYA:
775 self->blend = gst_compositor_blend_vuya;
776 self->overlay = gst_compositor_overlay_vuya;
777 self->fill_checker = gst_compositor_fill_checker_vuya;
778 self->fill_color = gst_compositor_fill_color_vuya;
781 case GST_VIDEO_FORMAT_ARGB:
782 self->blend = gst_compositor_blend_argb;
783 self->overlay = gst_compositor_overlay_argb;
784 self->fill_checker = gst_compositor_fill_checker_argb;
785 self->fill_color = gst_compositor_fill_color_argb;
788 case GST_VIDEO_FORMAT_BGRA:
789 self->blend = gst_compositor_blend_bgra;
790 self->overlay = gst_compositor_overlay_bgra;
791 self->fill_checker = gst_compositor_fill_checker_bgra;
792 self->fill_color = gst_compositor_fill_color_bgra;
795 case GST_VIDEO_FORMAT_ABGR:
796 self->blend = gst_compositor_blend_abgr;
797 self->overlay = gst_compositor_overlay_abgr;
798 self->fill_checker = gst_compositor_fill_checker_abgr;
799 self->fill_color = gst_compositor_fill_color_abgr;
802 case GST_VIDEO_FORMAT_RGBA:
803 self->blend = gst_compositor_blend_rgba;
804 self->overlay = gst_compositor_overlay_rgba;
805 self->fill_checker = gst_compositor_fill_checker_rgba;
806 self->fill_color = gst_compositor_fill_color_rgba;
809 case GST_VIDEO_FORMAT_Y444:
810 self->blend = gst_compositor_blend_y444;
811 self->overlay = self->blend;
812 self->fill_checker = gst_compositor_fill_checker_y444;
813 self->fill_color = gst_compositor_fill_color_y444;
816 case GST_VIDEO_FORMAT_Y42B:
817 self->blend = gst_compositor_blend_y42b;
818 self->overlay = self->blend;
819 self->fill_checker = gst_compositor_fill_checker_y42b;
820 self->fill_color = gst_compositor_fill_color_y42b;
823 case GST_VIDEO_FORMAT_YUY2:
824 self->blend = gst_compositor_blend_yuy2;
825 self->overlay = self->blend;
826 self->fill_checker = gst_compositor_fill_checker_yuy2;
827 self->fill_color = gst_compositor_fill_color_yuy2;
830 case GST_VIDEO_FORMAT_UYVY:
831 self->blend = gst_compositor_blend_uyvy;
832 self->overlay = self->blend;
833 self->fill_checker = gst_compositor_fill_checker_uyvy;
834 self->fill_color = gst_compositor_fill_color_uyvy;
837 case GST_VIDEO_FORMAT_YVYU:
838 self->blend = gst_compositor_blend_yvyu;
839 self->overlay = self->blend;
840 self->fill_checker = gst_compositor_fill_checker_yvyu;
841 self->fill_color = gst_compositor_fill_color_yvyu;
844 case GST_VIDEO_FORMAT_I420:
845 self->blend = gst_compositor_blend_i420;
846 self->overlay = self->blend;
847 self->fill_checker = gst_compositor_fill_checker_i420;
848 self->fill_color = gst_compositor_fill_color_i420;
851 case GST_VIDEO_FORMAT_YV12:
852 self->blend = gst_compositor_blend_yv12;
853 self->overlay = self->blend;
854 self->fill_checker = gst_compositor_fill_checker_yv12;
855 self->fill_color = gst_compositor_fill_color_yv12;
858 case GST_VIDEO_FORMAT_NV12:
859 self->blend = gst_compositor_blend_nv12;
860 self->overlay = self->blend;
861 self->fill_checker = gst_compositor_fill_checker_nv12;
862 self->fill_color = gst_compositor_fill_color_nv12;
865 case GST_VIDEO_FORMAT_NV21:
866 self->blend = gst_compositor_blend_nv21;
867 self->overlay = self->blend;
868 self->fill_checker = gst_compositor_fill_checker_nv21;
869 self->fill_color = gst_compositor_fill_color_nv21;
872 case GST_VIDEO_FORMAT_Y41B:
873 self->blend = gst_compositor_blend_y41b;
874 self->overlay = self->blend;
875 self->fill_checker = gst_compositor_fill_checker_y41b;
876 self->fill_color = gst_compositor_fill_color_y41b;
879 case GST_VIDEO_FORMAT_RGB:
880 self->blend = gst_compositor_blend_rgb;
881 self->overlay = self->blend;
882 self->fill_checker = gst_compositor_fill_checker_rgb;
883 self->fill_color = gst_compositor_fill_color_rgb;
886 case GST_VIDEO_FORMAT_BGR:
887 self->blend = gst_compositor_blend_bgr;
888 self->overlay = self->blend;
889 self->fill_checker = gst_compositor_fill_checker_bgr;
890 self->fill_color = gst_compositor_fill_color_bgr;
893 case GST_VIDEO_FORMAT_xRGB:
894 self->blend = gst_compositor_blend_xrgb;
895 self->overlay = self->blend;
896 self->fill_checker = gst_compositor_fill_checker_xrgb;
897 self->fill_color = gst_compositor_fill_color_xrgb;
900 case GST_VIDEO_FORMAT_xBGR:
901 self->blend = gst_compositor_blend_xbgr;
902 self->overlay = self->blend;
903 self->fill_checker = gst_compositor_fill_checker_xbgr;
904 self->fill_color = gst_compositor_fill_color_xbgr;
907 case GST_VIDEO_FORMAT_RGBx:
908 self->blend = gst_compositor_blend_rgbx;
909 self->overlay = self->blend;
910 self->fill_checker = gst_compositor_fill_checker_rgbx;
911 self->fill_color = gst_compositor_fill_color_rgbx;
914 case GST_VIDEO_FORMAT_BGRx:
915 self->blend = gst_compositor_blend_bgrx;
916 self->overlay = self->blend;
917 self->fill_checker = gst_compositor_fill_checker_bgrx;
918 self->fill_color = gst_compositor_fill_color_bgrx;
929 _fixate_caps (GstAggregator * agg, GstCaps * caps)
931 GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (agg);
933 gint best_width = -1, best_height = -1;
934 gint best_fps_n = -1, best_fps_d = -1;
936 gdouble best_fps = 0.;
940 ret = gst_caps_make_writable (caps);
942 /* we need this to calculate how large to make the output frame */
943 s = gst_caps_get_structure (ret, 0);
944 if (gst_structure_has_field (s, "pixel-aspect-ratio")) {
945 gst_structure_fixate_field_nearest_fraction (s, "pixel-aspect-ratio", 1, 1);
946 gst_structure_get_fraction (s, "pixel-aspect-ratio", &par_n, &par_d);
951 GST_OBJECT_LOCK (vagg);
952 for (l = GST_ELEMENT (vagg)->sinkpads; l; l = l->next) {
953 GstVideoAggregatorPad *vaggpad = l->data;
954 GstCompositorPad *compositor_pad = GST_COMPOSITOR_PAD (vaggpad);
955 gint this_width, this_height;
962 fps_n = GST_VIDEO_INFO_FPS_N (&vaggpad->info);
963 fps_d = GST_VIDEO_INFO_FPS_D (&vaggpad->info);
964 _mixer_pad_get_output_size (GST_COMPOSITOR (vagg), compositor_pad, par_n,
965 par_d, &width, &height, &x_offset, &y_offset);
967 if (width == 0 || height == 0)
970 /* {x,y}_offset represent padding size of each top and left area.
971 * To calculate total resolution, count bottom and right padding area
973 this_width = width + MAX (compositor_pad->xpos + 2 * x_offset, 0);
974 this_height = height + MAX (compositor_pad->ypos + 2 * y_offset, 0);
976 if (best_width < this_width)
977 best_width = this_width;
978 if (best_height < this_height)
979 best_height = this_height;
984 gst_util_fraction_to_double (fps_n, fps_d, &cur_fps);
986 if (best_fps < cur_fps) {
992 GST_OBJECT_UNLOCK (vagg);
994 if (best_fps_n <= 0 || best_fps_d <= 0 || best_fps == 0.0) {
1000 gst_structure_fixate_field_nearest_int (s, "width", best_width);
1001 gst_structure_fixate_field_nearest_int (s, "height", best_height);
1002 gst_structure_fixate_field_nearest_fraction (s, "framerate", best_fps_n,
1004 ret = gst_caps_fixate (ret);
1010 gst_parallelized_task_thread_func (gpointer data)
1012 GstParallelizedTaskRunner *runner = data;
1015 g_mutex_lock (&runner->lock);
1016 idx = runner->n_todo--;
1017 g_assert (runner->n_todo >= -1);
1018 g_mutex_unlock (&runner->lock);
1020 g_assert (runner->func != NULL);
1022 runner->func (runner->task_data[idx]);
1026 gst_parallelized_task_runner_join (GstParallelizedTaskRunner * self)
1028 gboolean joined = FALSE;
1031 g_mutex_lock (&self->lock);
1032 if (!(joined = gst_queue_array_is_empty (self->tasks))) {
1033 gpointer task = gst_queue_array_pop_head (self->tasks);
1034 g_mutex_unlock (&self->lock);
1035 gst_task_pool_join (self->pool, task);
1037 g_mutex_unlock (&self->lock);
1043 gst_parallelized_task_runner_free (GstParallelizedTaskRunner * self)
1045 gst_parallelized_task_runner_join (self);
1047 gst_queue_array_free (self->tasks);
1049 gst_task_pool_cleanup (self->pool);
1050 gst_object_unref (self->pool);
1051 g_mutex_clear (&self->lock);
1055 static GstParallelizedTaskRunner *
1056 gst_parallelized_task_runner_new (guint n_threads, GstTaskPool * pool,
1057 gboolean async_tasks)
1059 GstParallelizedTaskRunner *self;
1062 n_threads = g_get_num_processors ();
1064 self = g_new0 (GstParallelizedTaskRunner, 1);
1067 self->pool = g_object_ref (pool);
1068 self->own_pool = FALSE;
1070 /* No reason to split up the work between more threads than the
1072 if (GST_IS_SHARED_TASK_POOL (pool))
1075 gst_shared_task_pool_get_max_threads (GST_SHARED_TASK_POOL (pool)));
1077 self->pool = gst_shared_task_pool_new ();
1078 self->own_pool = TRUE;
1079 gst_shared_task_pool_set_max_threads (GST_SHARED_TASK_POOL (self->pool),
1081 gst_task_pool_prepare (self->pool, NULL);
1084 self->tasks = gst_queue_array_new (n_threads);
1086 self->n_threads = n_threads;
1089 g_mutex_init (&self->lock);
1091 /* Set when scheduling a job */
1093 self->task_data = NULL;
1094 self->async_tasks = async_tasks;
1100 gst_parallelized_task_runner_finish (GstParallelizedTaskRunner * self)
1102 g_return_if_fail (self->func != NULL);
1104 gst_parallelized_task_runner_join (self);
1107 self->task_data = NULL;
1111 gst_parallelized_task_runner_run (GstParallelizedTaskRunner * self,
1112 GstParallelizedTaskFunc func, gpointer * task_data)
1114 guint n_threads = self->n_threads;
1117 self->task_data = task_data;
1119 if (n_threads > 1 || self->async_tasks) {
1121 g_mutex_lock (&self->lock);
1122 self->n_todo = self->n_threads - 1;
1123 if (!self->async_tasks) {
1124 /* if not async, perform one of the functions in the current thread */
1128 for (; i < n_threads; i++) {
1130 gst_task_pool_push (self->pool, gst_parallelized_task_thread_func,
1133 /* The return value of push() is nullable but NULL is only returned
1134 * with the shared task pool when gst_task_pool_prepare() has not been
1135 * called and would thus be a programming error that we should hard-fail
1138 g_assert (task != NULL);
1139 gst_queue_array_push_tail (self->tasks, task);
1141 g_mutex_unlock (&self->lock);
1144 if (!self->async_tasks) {
1145 self->func (self->task_data[self->n_threads - 1]);
1147 gst_parallelized_task_runner_finish (self);
1152 _negotiated_caps (GstAggregator * agg, GstCaps * caps)
1154 GstCompositor *compositor = GST_COMPOSITOR (agg);
1155 GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (agg);
1156 GstVideoInfo v_info;
1159 GST_DEBUG_OBJECT (agg, "Negotiated caps %" GST_PTR_FORMAT, caps);
1161 if (!gst_video_info_from_caps (&v_info, caps))
1164 if (!set_functions (compositor, &v_info)) {
1165 GST_ERROR_OBJECT (agg, "Failed to setup vfuncs");
1169 n_threads = g_get_num_processors ();
1170 /* Magic number of 200 lines */
1171 if (GST_VIDEO_INFO_HEIGHT (&v_info) / n_threads < 200)
1172 n_threads = (GST_VIDEO_INFO_HEIGHT (&v_info) + 199) / 200;
1176 /* XXX: implement better thread count change */
1177 if (compositor->blend_runner
1178 && compositor->blend_runner->n_threads != n_threads) {
1179 gst_parallelized_task_runner_free (compositor->blend_runner);
1180 compositor->blend_runner = NULL;
1182 if (!compositor->blend_runner) {
1183 GstTaskPool *pool = gst_video_aggregator_get_execution_task_pool (vagg);
1184 compositor->blend_runner =
1185 gst_parallelized_task_runner_new (n_threads, pool, FALSE);
1186 gst_clear_object (&pool);
1189 return GST_AGGREGATOR_CLASS (parent_class)->negotiated_src_caps (agg, caps);
1193 _should_draw_background (GstVideoAggregator * vagg)
1195 GstVideoRectangle bg_rect;
1196 gboolean draw = TRUE;
1199 bg_rect.x = bg_rect.y = 0;
1201 GST_OBJECT_LOCK (vagg);
1202 bg_rect.w = GST_VIDEO_INFO_WIDTH (&vagg->info);
1203 bg_rect.h = GST_VIDEO_INFO_HEIGHT (&vagg->info);
1204 /* Check if the background is completely obscured by a pad
1205 * TODO: Also skip if it's obscured by a combination of pads */
1206 for (l = GST_ELEMENT (vagg)->sinkpads; l; l = l->next) {
1207 if (_pad_obscures_rectangle (vagg, l->data, bg_rect)) {
1212 GST_OBJECT_UNLOCK (vagg);
1217 frames_can_copy (const GstVideoFrame * frame1, const GstVideoFrame * frame2)
1219 if (GST_VIDEO_FRAME_FORMAT (frame1) != GST_VIDEO_FRAME_FORMAT (frame2))
1221 if (GST_VIDEO_FRAME_HEIGHT (frame1) != GST_VIDEO_FRAME_HEIGHT (frame2))
1223 if (GST_VIDEO_FRAME_WIDTH (frame1) != GST_VIDEO_FRAME_WIDTH (frame2))
1228 struct CompositePadInfo
1230 GstVideoFrame *prepared_frame;
1231 GstCompositorPad *pad;
1232 GstCompositorBlendMode blend_mode;
1235 struct CompositeTask
1237 GstCompositor *compositor;
1238 GstVideoFrame *out_frame;
1239 guint dst_line_start;
1241 gboolean draw_background;
1243 struct CompositePadInfo *pads_info;
1247 _draw_background (GstCompositor * comp, GstVideoFrame * outframe,
1248 guint y_start, guint y_end, BlendFunction * composite)
1250 *composite = comp->blend;
1252 switch (comp->background) {
1253 case COMPOSITOR_BACKGROUND_CHECKER:
1254 comp->fill_checker (outframe, y_start, y_end);
1256 case COMPOSITOR_BACKGROUND_BLACK:
1257 comp->fill_color (outframe, y_start, y_end, 16, 128, 128);
1259 case COMPOSITOR_BACKGROUND_WHITE:
1260 comp->fill_color (outframe, y_start, y_end, 240, 128, 128);
1262 case COMPOSITOR_BACKGROUND_TRANSPARENT:
1264 guint i, plane, num_planes, height;
1266 num_planes = GST_VIDEO_FRAME_N_PLANES (outframe);
1267 for (plane = 0; plane < num_planes; ++plane) {
1268 const GstVideoFormatInfo *info;
1269 gint comp[GST_VIDEO_MAX_COMPONENTS];
1271 gsize rowsize, plane_stride;
1274 info = outframe->info.finfo;
1275 pdata = GST_VIDEO_FRAME_PLANE_DATA (outframe, plane);
1276 plane_stride = GST_VIDEO_FRAME_PLANE_STRIDE (outframe, plane);
1278 gst_video_format_info_component (info, plane, comp);
1279 rowsize = GST_VIDEO_FRAME_COMP_WIDTH (outframe, comp[0])
1280 * GST_VIDEO_FRAME_COMP_PSTRIDE (outframe, comp[0]);
1281 height = GST_VIDEO_FORMAT_INFO_SCALE_HEIGHT (info, comp[0],
1284 yoffset = GST_VIDEO_FORMAT_INFO_SCALE_HEIGHT (info, comp[0], y_start);
1286 pdata += yoffset * plane_stride;
1287 for (i = 0; i < height; ++i) {
1288 memset (pdata, 0, rowsize);
1289 pdata += plane_stride;
1292 /* use overlay to keep background transparent */
1293 *composite = comp->overlay;
1300 blend_pads (struct CompositeTask *comp)
1302 BlendFunction composite;
1305 composite = comp->compositor->blend;
1307 if (comp->draw_background) {
1308 _draw_background (comp->compositor, comp->out_frame, comp->dst_line_start,
1309 comp->dst_line_end, &composite);
1312 for (i = 0; i < comp->n_pads; i++) {
1313 composite (comp->pads_info[i].prepared_frame,
1314 comp->pads_info[i].pad->xpos + comp->pads_info[i].pad->x_offset,
1315 comp->pads_info[i].pad->ypos + comp->pads_info[i].pad->y_offset,
1316 comp->pads_info[i].pad->alpha, comp->out_frame, comp->dst_line_start,
1317 comp->dst_line_end, comp->pads_info[i].blend_mode);
1321 static GstFlowReturn
1322 gst_compositor_aggregate_frames (GstVideoAggregator * vagg, GstBuffer * outbuf)
1324 GstCompositor *compositor = GST_COMPOSITOR (vagg);
1326 GstVideoFrame out_frame, *outframe;
1327 gboolean draw_background;
1328 guint drawn_a_pad = FALSE;
1329 struct CompositePadInfo *pads_info;
1330 guint i, n_pads = 0;
1332 if (!gst_video_frame_map (&out_frame, &vagg->info, outbuf, GST_MAP_WRITE)) {
1333 GST_WARNING_OBJECT (vagg, "Could not map output buffer");
1334 return GST_FLOW_ERROR;
1337 outframe = &out_frame;
1339 /* If one of the frames to be composited completely obscures the background,
1340 * don't bother drawing the background at all. We can also always use the
1341 * 'blend' BlendFunction in that case because it only changes if we have to
1342 * overlay on top of a transparent background. */
1343 draw_background = _should_draw_background (vagg);
1345 GST_OBJECT_LOCK (vagg);
1346 for (l = GST_ELEMENT (vagg)->sinkpads; l; l = l->next) {
1347 GstVideoAggregatorPad *pad = l->data;
1348 GstVideoFrame *prepared_frame =
1349 gst_video_aggregator_pad_get_prepared_frame (pad);
1355 pads_info = g_newa (struct CompositePadInfo, n_pads);
1358 for (l = GST_ELEMENT (vagg)->sinkpads; l; l = l->next) {
1359 GstVideoAggregatorPad *pad = l->data;
1360 GstCompositorPad *compo_pad = GST_COMPOSITOR_PAD (pad);
1361 GstVideoFrame *prepared_frame =
1362 gst_video_aggregator_pad_get_prepared_frame (pad);
1363 GstCompositorBlendMode blend_mode = COMPOSITOR_BLEND_MODE_OVER;
1365 switch (compo_pad->op) {
1366 case COMPOSITOR_OPERATOR_SOURCE:
1367 blend_mode = COMPOSITOR_BLEND_MODE_SOURCE;
1369 case COMPOSITOR_OPERATOR_OVER:
1370 blend_mode = COMPOSITOR_BLEND_MODE_OVER;
1372 case COMPOSITOR_OPERATOR_ADD:
1373 blend_mode = COMPOSITOR_BLEND_MODE_ADD;
1376 g_assert_not_reached ();
1380 if (prepared_frame != NULL) {
1381 /* If this is the first pad we're drawing, and we didn't draw the
1382 * background, and @prepared_frame has the same format, height, and width
1383 * as @outframe, then we can just copy it as-is. Subsequent pads (if any)
1384 * will be composited on top of it. */
1385 if (!drawn_a_pad && !draw_background &&
1386 frames_can_copy (prepared_frame, outframe)) {
1387 gst_video_frame_copy (outframe, prepared_frame);
1389 pads_info[n_pads].pad = compo_pad;
1390 pads_info[n_pads].prepared_frame = prepared_frame;
1391 pads_info[n_pads].blend_mode = blend_mode;
1399 guint n_threads, lines_per_thread;
1401 struct CompositeTask *tasks;
1402 struct CompositeTask **tasks_p;
1404 n_threads = compositor->blend_runner->n_threads;
1406 tasks = g_newa (struct CompositeTask, n_threads);
1407 tasks_p = g_newa (struct CompositeTask *, n_threads);
1409 out_height = GST_VIDEO_FRAME_HEIGHT (outframe);
1410 lines_per_thread = (out_height + n_threads - 1) / n_threads;
1412 for (i = 0; i < n_threads; i++) {
1413 tasks[i].compositor = compositor;
1414 tasks[i].n_pads = n_pads;
1415 tasks[i].pads_info = pads_info;
1416 tasks[i].out_frame = outframe;
1417 tasks[i].draw_background = draw_background;
1418 /* This is a dumb split of the work by number of output lines.
1419 * If there is a section of the output that reads from a lot of source
1420 * pads, then that thread will consume more time. Maybe tracking and
1421 * splitting on the source fill rate would produce better results. */
1422 tasks[i].dst_line_start = i * lines_per_thread;
1423 tasks[i].dst_line_end = MIN ((i + 1) * lines_per_thread, out_height);
1425 tasks_p[i] = &tasks[i];
1428 gst_parallelized_task_runner_run (compositor->blend_runner,
1429 (GstParallelizedTaskFunc) blend_pads, (gpointer *) tasks_p);
1432 GST_OBJECT_UNLOCK (vagg);
1434 gst_video_frame_unmap (outframe);
1440 gst_compositor_request_new_pad (GstElement * element, GstPadTemplate * templ,
1441 const gchar * req_name, const GstCaps * caps)
1446 GST_ELEMENT_CLASS (parent_class)->request_new_pad (element,
1447 templ, req_name, caps);
1450 goto could_not_create;
1452 gst_child_proxy_child_added (GST_CHILD_PROXY (element), G_OBJECT (newpad),
1453 GST_OBJECT_NAME (newpad));
1459 GST_DEBUG_OBJECT (element, "could not create/add pad");
1465 gst_compositor_release_pad (GstElement * element, GstPad * pad)
1467 GstCompositor *compositor;
1469 compositor = GST_COMPOSITOR (element);
1471 GST_DEBUG_OBJECT (compositor, "release pad %s:%s", GST_DEBUG_PAD_NAME (pad));
1473 gst_child_proxy_child_removed (GST_CHILD_PROXY (compositor), G_OBJECT (pad),
1474 GST_OBJECT_NAME (pad));
1476 GST_ELEMENT_CLASS (parent_class)->release_pad (element, pad);
1480 _sink_query (GstAggregator * agg, GstAggregatorPad * bpad, GstQuery * query)
1482 switch (GST_QUERY_TYPE (query)) {
1483 case GST_QUERY_ALLOCATION:{
1486 GstBufferPool *pool;
1488 GstStructure *structure;
1490 gst_query_parse_allocation (query, &caps, NULL);
1495 if (!gst_video_info_from_caps (&info, caps))
1498 size = GST_VIDEO_INFO_SIZE (&info);
1500 pool = gst_video_buffer_pool_new ();
1502 structure = gst_buffer_pool_get_config (pool);
1503 gst_buffer_pool_config_set_params (structure, caps, size, 0, 0);
1505 if (!gst_buffer_pool_set_config (pool, structure)) {
1506 gst_object_unref (pool);
1510 gst_query_add_allocation_pool (query, pool, size, 0, 0);
1511 gst_object_unref (pool);
1512 gst_query_add_allocation_meta (query, GST_VIDEO_META_API_TYPE, NULL);
1517 return GST_AGGREGATOR_CLASS (parent_class)->sink_query (agg, bpad, query);
1522 gst_compositor_finalize (GObject * object)
1524 GstCompositor *compositor = GST_COMPOSITOR (object);
1526 if (compositor->blend_runner)
1527 gst_parallelized_task_runner_free (compositor->blend_runner);
1528 compositor->blend_runner = NULL;
1530 G_OBJECT_CLASS (parent_class)->finalize (object);
1533 /* GObject boilerplate */
1535 gst_compositor_class_init (GstCompositorClass * klass)
1537 GObjectClass *gobject_class = (GObjectClass *) klass;
1538 GstElementClass *gstelement_class = (GstElementClass *) klass;
1539 GstVideoAggregatorClass *videoaggregator_class =
1540 (GstVideoAggregatorClass *) klass;
1541 GstAggregatorClass *agg_class = (GstAggregatorClass *) klass;
1543 gobject_class->get_property = gst_compositor_get_property;
1544 gobject_class->set_property = gst_compositor_set_property;
1545 gobject_class->finalize = gst_compositor_finalize;
1547 gstelement_class->request_new_pad =
1548 GST_DEBUG_FUNCPTR (gst_compositor_request_new_pad);
1549 gstelement_class->release_pad =
1550 GST_DEBUG_FUNCPTR (gst_compositor_release_pad);
1551 agg_class->sink_query = _sink_query;
1552 agg_class->fixate_src_caps = _fixate_caps;
1553 agg_class->negotiated_src_caps = _negotiated_caps;
1554 videoaggregator_class->aggregate_frames = gst_compositor_aggregate_frames;
1556 g_object_class_install_property (gobject_class, PROP_BACKGROUND,
1557 g_param_spec_enum ("background", "Background", "Background type",
1558 GST_TYPE_COMPOSITOR_BACKGROUND,
1559 DEFAULT_BACKGROUND, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
1562 * compositor:zero-size-is-unscaled:
1564 * Whether a pad with height or width 0 should be left unscaled
1565 * in that dimension, or simply not composited in. Setting it to
1566 * %FALSE might be useful when animating those properties.
1570 g_object_class_install_property (gobject_class, PROP_ZERO_SIZE_IS_UNSCALED,
1571 g_param_spec_boolean ("zero-size-is-unscaled", "Zero size is unscaled",
1572 "If TRUE, then input video is unscaled in that dimension "
1573 "if width or height is 0 (for backwards compatibility)",
1574 DEFAULT_ZERO_SIZE_IS_UNSCALED,
1575 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
1577 gst_element_class_add_static_pad_template_with_gtype (gstelement_class,
1578 &src_factory, GST_TYPE_AGGREGATOR_PAD);
1579 gst_element_class_add_static_pad_template_with_gtype (gstelement_class,
1580 &sink_factory, GST_TYPE_COMPOSITOR_PAD);
1582 gst_element_class_set_static_metadata (gstelement_class, "Compositor",
1583 "Filter/Editor/Video/Compositor",
1584 "Composite multiple video streams", "Wim Taymans <wim@fluendo.com>, "
1585 "Sebastian Dröge <sebastian.droege@collabora.co.uk>");
1587 gst_type_mark_as_plugin_api (GST_TYPE_COMPOSITOR_PAD, 0);
1588 gst_type_mark_as_plugin_api (GST_TYPE_COMPOSITOR_OPERATOR, 0);
1589 gst_type_mark_as_plugin_api (GST_TYPE_COMPOSITOR_BACKGROUND, 0);
1593 gst_compositor_init (GstCompositor * self)
1595 /* initialize variables */
1596 self->background = DEFAULT_BACKGROUND;
1597 self->zero_size_is_unscaled = DEFAULT_ZERO_SIZE_IS_UNSCALED;
1600 /* GstChildProxy implementation */
1602 gst_compositor_child_proxy_get_child_by_index (GstChildProxy * child_proxy,
1605 GstCompositor *compositor = GST_COMPOSITOR (child_proxy);
1606 GObject *obj = NULL;
1608 GST_OBJECT_LOCK (compositor);
1609 obj = g_list_nth_data (GST_ELEMENT_CAST (compositor)->sinkpads, index);
1611 gst_object_ref (obj);
1612 GST_OBJECT_UNLOCK (compositor);
1618 gst_compositor_child_proxy_get_children_count (GstChildProxy * child_proxy)
1621 GstCompositor *compositor = GST_COMPOSITOR (child_proxy);
1623 GST_OBJECT_LOCK (compositor);
1624 count = GST_ELEMENT_CAST (compositor)->numsinkpads;
1625 GST_OBJECT_UNLOCK (compositor);
1626 GST_INFO_OBJECT (compositor, "Children Count: %d", count);
1632 gst_compositor_child_proxy_init (gpointer g_iface, gpointer iface_data)
1634 GstChildProxyInterface *iface = g_iface;
1636 iface->get_child_by_index = gst_compositor_child_proxy_get_child_by_index;
1637 iface->get_children_count = gst_compositor_child_proxy_get_children_count;
1640 /* Element registration */
1642 plugin_init (GstPlugin * plugin)
1644 GST_DEBUG_CATEGORY_INIT (gst_compositor_debug, "compositor", 0, "compositor");
1646 gst_compositor_init_blend ();
1648 return GST_ELEMENT_REGISTER (compositor, plugin);
1651 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
1654 "Compositor", plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME,