From 9c575243e1fe19795c7ef6940ecfd94211e144b6 Mon Sep 17 00:00:00 2001 From: Thibault Saunier Date: Tue, 11 Jul 2017 22:04:55 -0400 Subject: [PATCH] tests: examples: Add a simple crossfade example https://bugzilla.gnome.org/show_bug.cgi?id=784827 --- tests/examples/compositor/crossfade.c | 135 ++++++++++++++++++++++++++ tests/examples/compositor/meson.build | 15 +++ tests/examples/meson.build | 2 + tests/meson.build | 2 + 4 files changed, 154 insertions(+) create mode 100644 tests/examples/compositor/crossfade.c create mode 100644 tests/examples/compositor/meson.build create mode 100644 tests/examples/meson.build diff --git a/tests/examples/compositor/crossfade.c b/tests/examples/compositor/crossfade.c new file mode 100644 index 0000000000..de8dd45c79 --- /dev/null +++ b/tests/examples/compositor/crossfade.c @@ -0,0 +1,135 @@ +/* + * GStreamer + * Copyright (C) 2017 Thibault Saunier + * + * 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 crossfade example using the compositor element. + * + * Takes a list of uri/path to video files and crossfade them + * for 10 seconds and returns. + */ + +#include +#include +#include +#include + +typedef struct +{ + GstElement *compositor; + guint z_order; + gboolean is_last; +} VideoInfo; + +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) +{ + GstPad *sinkpad = + gst_element_get_request_pad (GST_ELEMENT (info->compositor), "sink_%u"); + + if (!info->is_last) { + GstControlSource *control_source; + + control_source = gst_interpolation_control_source_new (); + + g_object_set (sinkpad, "crossfade-ratio", 1.0, NULL); + gst_object_add_control_binding (GST_OBJECT (sinkpad), + gst_direct_control_binding_new_absolute (GST_OBJECT (sinkpad), + "crossfade-ratio", control_source)); + + g_object_set (control_source, "mode", GST_INTERPOLATION_MODE_LINEAR, NULL); + + gst_timed_value_control_source_set (GST_TIMED_VALUE_CONTROL_SOURCE + (control_source), 0, 1.0); + gst_timed_value_control_source_set (GST_TIMED_VALUE_CONTROL_SOURCE + (control_source), 10 * GST_SECOND, 0.0); + } + g_object_set (sinkpad, "zorder", info->z_order, NULL); + + gst_pad_link (pad, sinkpad); + + g_free (info); +} + +int +main (int argc, char *argv[]) +{ + gint i; + GstMessage *message; + GstElement *compositor, *sink, *pipeline; + GstBus *bus; + + if (argc < 2) { + g_error ("At least 1 valid video file paths/urls need to " "be provided"); + return -1; + } + + gst_init (&argc, &argv); + pipeline = gst_element_factory_make ("pipeline", NULL); + compositor = gst_element_factory_make ("compositor", NULL); + sink = + gst_parse_bin_from_description ("videoconvert ! autovideosink", TRUE, + NULL); + + gst_util_set_object_arg (G_OBJECT (compositor), "background", "black"); + + gst_bin_add_many (GST_BIN (pipeline), compositor, sink, NULL); + g_assert (gst_element_link (compositor, sink)); + + for (i = 1; i < argc; 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; + info->z_order = i - 1; + info->is_last = (i == (argc - 1)) && (argc > 2); + 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, 11 * GST_SECOND, + GST_MESSAGE_EOS | GST_MESSAGE_ERROR); + GST_DEBUG_BIN_TO_DOT_FILE_WITH_TS (GST_BIN (pipeline), + GST_DEBUG_GRAPH_SHOW_ALL, "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); +} diff --git a/tests/examples/compositor/meson.build b/tests/examples/compositor/meson.build new file mode 100644 index 0000000000..2bffb16119 --- /dev/null +++ b/tests/examples/compositor/meson.build @@ -0,0 +1,15 @@ +examples = [ 'crossfade' ] + +foreach example : examples + exe_name = example + src_file = '@0@.c'.format(example) + + executable(exe_name, + src_file, + install: true, + include_directories : [configinc], + dependencies : [glib_dep, gst_dep, gstcontroller_dep], + c_args : ['-DHAVE_CONFIG_H=1' ], + ) +endforeach + diff --git a/tests/examples/meson.build b/tests/examples/meson.build new file mode 100644 index 0000000000..885738425d --- /dev/null +++ b/tests/examples/meson.build @@ -0,0 +1,2 @@ +# FIXME - Add other missing examples! +subdir('compositor') diff --git a/tests/meson.build b/tests/meson.build index b964a355d1..ffab51ec0b 100644 --- a/tests/meson.build +++ b/tests/meson.build @@ -2,3 +2,5 @@ if host_machine.system() != 'windows' subdir('check') endif + +subdir('examples')