Commit f51b3fcd authored by Jan Schmidt's avatar Jan Schmidt Committed by GStreamer Marge Bot

examples: Add a compositor mosaic example.

Add an example of configuring compositor to display 2 videos
side-by-side in a mosaic, and additionally configure some
video-converter properties to demonstrate how that works..

Part-of: <gstreamer/gst-plugins-base!919>
parent 297a1555
......@@ -4,6 +4,12 @@ executable('crossfade', 'crossfade.c',
dependencies: [gst_controller_dep, gst_dep],
install: false)
executable('mosaic', 'mosaic.c',
include_directories: [configinc],
c_args: ['-DHAVE_CONFIG_H'],
dependencies: [video_dep, gst_dep],
install: false)
executable('signals', 'signals.c',
include_directories: [configinc],
c_args: ['-DHAVE_CONFIG_H'],
......
/*
* GStreamer
* Copyright (C) 2017 Thibault Saunier <thibault.saunier@osg-samsung.com>
* Copyright (C) 2020 Jan Schmidt <jan@centricular.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* Simple example using the compositor element.
*
* Takes two video files and display them side-by-side as a mosaic
*/
#include <stdlib.h>
#include <gst/gst.h>
#include <gst/video/video.h>
typedef struct
{
GstElement *compositor;
gint x, y, w, h;
gint zorder;
} VideoInfo;
static gchar *
ensure_uri (const gchar * location)
{
if (gst_uri_is_valid (location))
return g_strdup (location);
else
return gst_filename_to_uri (location, NULL);
}
static void
_pad_added_cb (GstElement * decodebin, GstPad * pad, VideoInfo * info)
{
GstStructure *converter_config;
GstPad *sinkpad =
gst_element_get_request_pad (GST_ELEMENT (info->compositor), "sink_%u");
converter_config = gst_structure_new ("GstVideoConverter",
GST_VIDEO_CONVERTER_OPT_THREADS, G_TYPE_UINT, 0,
GST_VIDEO_CONVERTER_OPT_RESAMPLER_METHOD, GST_TYPE_VIDEO_RESAMPLER_METHOD,
GST_VIDEO_RESAMPLER_METHOD_NEAREST, GST_VIDEO_CONVERTER_OPT_DEST_X,
G_TYPE_INT, 0, GST_VIDEO_CONVERTER_OPT_DEST_Y, G_TYPE_INT, 0,
GST_VIDEO_CONVERTER_OPT_DEST_WIDTH, G_TYPE_INT, info->w,
GST_VIDEO_CONVERTER_OPT_DEST_HEIGHT, G_TYPE_INT, info->h, NULL);
g_object_set (sinkpad, "xpos", info->x, "ypos", info->y, "width", info->w,
"height", info->h, "converter-config", converter_config, NULL);
gst_structure_free (converter_config);
gst_pad_link (pad, sinkpad);
g_free (info);
}
int
main (int argc, char *argv[])
{
gint i;
GstMessage *message;
GstElement *compositor, *pipeline;
GstBus *bus;
if (argc != 3) {
g_error ("Need to provide 2 input videos");
return -1;
}
gst_init (&argc, &argv);
pipeline =
gst_parse_launch
("videotestsrc pattern=black is-live=true ! video/x-raw,width=1,height=1,format=AYUV ! compositor name=comp start-time-selection=first ! video/x-raw,format=AYUV,width=1275,height=833,framerate=25/1 ! videoconvert ! autovideosink",
NULL);
g_assert (pipeline != NULL);
compositor = gst_bin_get_by_name (GST_BIN (pipeline), "comp");
gst_util_set_object_arg (G_OBJECT (compositor), "background", "black");
for (i = 1; i < 3; i++) {
gchar *uri = ensure_uri (argv[i]);
VideoInfo *info = g_malloc0 (sizeof (VideoInfo));
GstElement *uridecodebin = gst_element_factory_make ("uridecodebin", NULL);
g_object_set (uridecodebin, "uri", uri, "expose-all-streams", FALSE,
"caps", gst_caps_from_string ("video/x-raw(ANY)"), NULL);
info->compositor = compositor;
if (i == 1) {
info->x = 326;
info->y = 155;
info->w = 930;
info->h = 523;
info->zorder = 2;
} else {
info->x = 19;
info->y = 155;
info->w = 288;
info->h = 162;
info->zorder = 3;
}
g_signal_connect (uridecodebin, "pad-added", (GCallback) _pad_added_cb,
info);
gst_bin_add (GST_BIN (pipeline), uridecodebin);
}
bus = gst_element_get_bus (pipeline);
gst_element_set_state (pipeline, GST_STATE_PLAYING);
message =
gst_bus_timed_pop_filtered (bus, 60 * GST_SECOND,
GST_MESSAGE_EOS | GST_MESSAGE_ERROR);
GST_DEBUG_BIN_TO_DOT_FILE_WITH_TS (GST_BIN (pipeline),
GST_DEBUG_GRAPH_SHOW_ALL | GST_DEBUG_GRAPH_SHOW_VERBOSE, "go");
if (message)
gst_print ("%" GST_PTR_FORMAT "\n", message);
else
gst_print ("Timeout\n");
gst_element_set_state (pipeline, GST_STATE_NULL);
gst_object_unref (pipeline);
return 0;
}
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