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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: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-base/-/merge_requests/919>
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2 changed files with 147 additions and 0 deletions
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@ -4,6 +4,12 @@ executable('crossfade', 'crossfade.c',
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dependencies: [gst_controller_dep, gst_dep],
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install: false)
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executable('mosaic', 'mosaic.c',
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include_directories: [configinc],
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c_args: ['-DHAVE_CONFIG_H'],
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dependencies: [video_dep, gst_dep],
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install: false)
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executable('signals', 'signals.c',
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include_directories: [configinc],
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c_args: ['-DHAVE_CONFIG_H'],
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141
tests/examples/compositor/mosaic.c
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141
tests/examples/compositor/mosaic.c
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@ -0,0 +1,141 @@
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/*
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* GStreamer
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* Copyright (C) 2017 Thibault Saunier <thibault.saunier@osg-samsung.com>
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* Copyright (C) 2020 Jan Schmidt <jan@centricular.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/**
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* Simple example using the compositor element.
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*
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* Takes two video files and display them side-by-side as a mosaic
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*/
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#include <stdlib.h>
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#include <gst/gst.h>
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#include <gst/video/video.h>
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typedef struct
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{
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GstElement *compositor;
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gint x, y, w, h;
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gint zorder;
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} VideoInfo;
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static gchar *
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ensure_uri (const gchar * location)
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{
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if (gst_uri_is_valid (location))
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return g_strdup (location);
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else
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return gst_filename_to_uri (location, NULL);
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}
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static void
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_pad_added_cb (GstElement * decodebin, GstPad * pad, VideoInfo * info)
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{
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GstStructure *converter_config;
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GstPad *sinkpad =
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gst_element_get_request_pad (GST_ELEMENT (info->compositor), "sink_%u");
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converter_config = gst_structure_new ("GstVideoConverter",
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GST_VIDEO_CONVERTER_OPT_THREADS, G_TYPE_UINT, 0,
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GST_VIDEO_CONVERTER_OPT_RESAMPLER_METHOD, GST_TYPE_VIDEO_RESAMPLER_METHOD,
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GST_VIDEO_RESAMPLER_METHOD_NEAREST, GST_VIDEO_CONVERTER_OPT_DEST_X,
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G_TYPE_INT, 0, GST_VIDEO_CONVERTER_OPT_DEST_Y, G_TYPE_INT, 0,
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GST_VIDEO_CONVERTER_OPT_DEST_WIDTH, G_TYPE_INT, info->w,
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GST_VIDEO_CONVERTER_OPT_DEST_HEIGHT, G_TYPE_INT, info->h, NULL);
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g_object_set (sinkpad, "xpos", info->x, "ypos", info->y, "width", info->w,
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"height", info->h, "converter-config", converter_config, NULL);
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gst_structure_free (converter_config);
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gst_pad_link (pad, sinkpad);
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g_free (info);
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}
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int
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main (int argc, char *argv[])
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{
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gint i;
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GstMessage *message;
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GstElement *compositor, *pipeline;
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GstBus *bus;
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if (argc != 3) {
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g_error ("Need to provide 2 input videos");
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return -1;
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}
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gst_init (&argc, &argv);
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pipeline =
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gst_parse_launch
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("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",
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NULL);
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g_assert (pipeline != NULL);
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compositor = gst_bin_get_by_name (GST_BIN (pipeline), "comp");
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gst_util_set_object_arg (G_OBJECT (compositor), "background", "black");
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for (i = 1; i < 3; i++) {
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gchar *uri = ensure_uri (argv[i]);
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VideoInfo *info = g_malloc0 (sizeof (VideoInfo));
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GstElement *uridecodebin = gst_element_factory_make ("uridecodebin", NULL);
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g_object_set (uridecodebin, "uri", uri, "expose-all-streams", FALSE,
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"caps", gst_caps_from_string ("video/x-raw(ANY)"), NULL);
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info->compositor = compositor;
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if (i == 1) {
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info->x = 326;
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info->y = 155;
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info->w = 930;
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info->h = 523;
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info->zorder = 2;
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} else {
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info->x = 19;
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info->y = 155;
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info->w = 288;
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info->h = 162;
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info->zorder = 3;
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}
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g_signal_connect (uridecodebin, "pad-added", (GCallback) _pad_added_cb,
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info);
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gst_bin_add (GST_BIN (pipeline), uridecodebin);
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}
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bus = gst_element_get_bus (pipeline);
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gst_element_set_state (pipeline, GST_STATE_PLAYING);
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message =
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gst_bus_timed_pop_filtered (bus, 60 * GST_SECOND,
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GST_MESSAGE_EOS | GST_MESSAGE_ERROR);
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GST_DEBUG_BIN_TO_DOT_FILE_WITH_TS (GST_BIN (pipeline),
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GST_DEBUG_GRAPH_SHOW_ALL | GST_DEBUG_GRAPH_SHOW_VERBOSE, "go");
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if (message)
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gst_print ("%" GST_PTR_FORMAT "\n", message);
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else
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gst_print ("Timeout\n");
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gst_element_set_state (pipeline, GST_STATE_NULL);
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gst_object_unref (pipeline);
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return 0;
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}
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