--- /dev/null
+/* GStreamer
+ * Copyright (C) 2022 Seungha Yang <seungha@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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <gst/gst.h>
+#include <gst/video/video.h>
+#include <stdlib.h>
+#include <string>
+#include <mutex>
+#include "../key-handler.h"
+
+static GMainLoop *loop = nullptr;
+static std::mutex input_lock;
+static gint par = 1;
+static gint fps = 30;
+static gboolean set_hdr10 = FALSE;
+static GstElement *setter = nullptr;
+static gboolean updated = FALSE;
+
+static void
+print_keyboard_help (void)
+{
+ static struct
+ {
+ const gchar *key_desc;
+ const gchar *key_help;
+ } key_controls[] = {
+ {
+ "q", "Quit"}, {
+ "right arrow", "Increase framerate"}, {
+ "left arrow", "Decrease framerate"}, {
+ "up arrow", "Increase pixel-aspect-ratio"}, {
+ "down arrow", "Decrease pixel-aspect-ratio"}, {
+ "m", "Toggle HDR10 metadata"}, {
+ "k", "show keyboard shortcuts"}
+ };
+
+ guint i, chars_to_pad, desc_len, max_desc_len = 0;
+
+ gst_print ("\n\n%s\n\n", "Keyboard controls:");
+
+ for (i = 0; i < G_N_ELEMENTS (key_controls); ++i) {
+ desc_len = g_utf8_strlen (key_controls[i].key_desc, -1);
+ max_desc_len = MAX (max_desc_len, desc_len);
+ }
+ ++max_desc_len;
+
+ for (i = 0; i < G_N_ELEMENTS (key_controls); ++i) {
+ chars_to_pad = max_desc_len - g_utf8_strlen (key_controls[i].key_desc, -1);
+ gst_print ("\t%s", key_controls[i].key_desc);
+ gst_print ("%-*s: ", chars_to_pad, "");
+ gst_print ("%s\n", key_controls[i].key_help);
+ }
+ gst_print ("\n");
+}
+
+static void
+keyboard_cb (gchar input, gboolean is_ascii, gpointer user_data)
+{
+ std::lock_guard<std::mutex> lk (input_lock);
+
+ if (!is_ascii) {
+ switch (input) {
+ case KB_ARROW_UP:
+ par++;
+ updated = TRUE;
+ gst_println ("Increasing pixel-aspect-ratio to %d", par);
+ break;
+ case KB_ARROW_DOWN:
+ if (par == 1)
+ return;
+ par--;
+ updated = TRUE;
+ gst_println ("Decreasing pixel-aspect-ratio to %d", par);
+ break;
+ case KB_ARROW_RIGHT:
+ fps++;
+ updated = TRUE;
+ gst_println ("Increasing framerate to %d", fps);
+ break;
+ case KB_ARROW_LEFT:
+ if (fps == 1)
+ return;
+ fps--;
+ updated = TRUE;
+ gst_println ("Decreasing framerate to %d", fps);
+ break;
+ default:
+ break;
+ }
+ } else {
+ switch (input) {
+ case 'k':
+ case 'K':
+ print_keyboard_help ();
+ break;
+ case 'q':
+ case 'Q':
+ g_main_loop_quit (loop);
+ break;
+ case 'm':
+ case 'M':
+ set_hdr10 = !set_hdr10;
+ updated = TRUE;
+ gst_println ("%sable HDR10 metadata", set_hdr10 ? "En" : "Dis");
+ break;
+ default:
+ break;
+ }
+ }
+
+ if (updated && setter) {
+ GstPad *pad = gst_element_get_static_pad (setter, "sink");
+ GstCaps *caps = gst_pad_get_current_caps (pad);
+ gst_object_unref (pad);
+
+ if (!caps)
+ return;
+
+ if (gst_caps_is_any (caps) || gst_caps_is_empty (caps)) {
+ gst_caps_unref (caps);
+ return;
+ }
+
+ caps = gst_caps_make_writable (caps);
+ gst_caps_set_simple (caps, "pixel-aspect-ratio", GST_TYPE_FRACTION,
+ par, 1, "framerate", GST_TYPE_FRACTION, fps, 1, nullptr);
+
+ if (set_hdr10) {
+ gst_caps_set_simple (caps, "mastering-display-info", G_TYPE_STRING,
+ "34000:16000:13250:34500:7500:3000:15635:16450:10000000:1",
+ "content-light-level", G_TYPE_STRING, "1000:400", nullptr);
+ }
+
+ g_object_set (setter, "caps", caps, nullptr);
+ gst_caps_unref (caps);
+ }
+}
+
+static void
+decoder_caps_notify (GstPad * pad, GParamSpec * pspec, gpointer user_data)
+{
+ GstCaps *caps;
+ gchar *caps_str;
+
+ g_object_get (pad, "caps", &caps, nullptr);
+ if (!caps)
+ return;
+
+ caps_str = gst_caps_to_string (caps);
+ gst_println ("\nDecoder output caps\n%s\n", caps_str);
+
+ g_free (caps_str);
+ gst_caps_unref (caps);
+}
+
+static gboolean
+bus_msg (GstBus * bus, GstMessage * msg, gpointer user_data)
+{
+ switch (GST_MESSAGE_TYPE (msg)) {
+ case GST_MESSAGE_ERROR:{
+ GError *err;
+ gchar *dbg;
+
+ gst_message_parse_error (msg, &err, &dbg);
+ gst_printerrln ("ERROR %s", err->message);
+ if (dbg != NULL)
+ gst_printerrln ("ERROR debug information: %s", dbg);
+ g_clear_error (&err);
+ g_free (dbg);
+
+ g_main_loop_quit (loop);
+ break;
+ }
+ case GST_MESSAGE_EOS:
+ gst_println ("Got EOS");
+ g_main_loop_quit (loop);
+ break;
+ default:
+ break;
+ }
+
+ return TRUE;
+}
+
+gint
+main (gint argc, gchar ** argv)
+{
+ GstElement *pipeline;
+ GError *error = nullptr;
+ GOptionContext *option_ctx;
+ gchar *decoder_name = nullptr;
+ gchar *encoder_name = nullptr;
+ gchar *sink_name = nullptr;
+ gchar *location = nullptr;
+ GOptionEntry options[] = {
+ {"decoder", 0, 0, G_OPTION_ARG_STRING, &decoder_name,
+ "Video decoder to use"},
+ {"encoder", 0, 0, G_OPTION_ARG_STRING, &encoder_name,
+ "Video encoder description. Ignored if \"location\" is set "
+ "(example: \"x264enc speed-preset=ultrafast\""},
+ {"videosink", 0, 0, G_OPTION_ARG_STRING, &sink_name,
+ "Video sink to use"},
+ {"location", 0, 0, G_OPTION_ARG_STRING, &location, "File location"},
+ {nullptr}
+ };
+
+ option_ctx =
+ g_option_context_new ("Video decoder caps update example");
+ g_option_context_add_main_entries (option_ctx, options, nullptr);
+ g_option_context_set_help_enabled (option_ctx, TRUE);
+ if (!g_option_context_parse (option_ctx, &argc, &argv, &error)) {
+ gst_printerrln ("option parsing failed: %s\n", error->message);
+ g_clear_error (&error);
+ exit (1);
+ }
+
+ g_option_context_free (option_ctx);
+ gst_init (nullptr, nullptr);
+
+ if (!decoder_name) {
+ gst_printerrln ("Decoder must be specified");
+ exit (1);
+ }
+
+ if (!encoder_name && !location) {
+ gst_printerrln ("Encoder or file location must be specified");
+ exit (1);
+ }
+
+ std::string pipeline_desc;
+ if (location) {
+ pipeline_desc = "filesrc location=" + std::string (location)
+ + " ! parsebin ! capssetter name=setter ! "
+ + std::string (decoder_name) + " name=dec";
+ } else {
+ pipeline_desc = "videotestsrc ! " + std::string (encoder_name)
+ + " ! parsebin ! capssetter name=setter ! "
+ + std::string (decoder_name) + " name=dec";
+ }
+
+ if (sink_name) {
+ pipeline_desc += " ! " + std::string (sink_name);
+ } else {
+ pipeline_desc += " ! fakevideosink";
+ }
+
+ gst_println ("Constructing test pipeline \"%s\"", pipeline_desc.c_str());
+
+ loop = g_main_loop_new (nullptr, FALSE);
+ pipeline = gst_parse_launch (pipeline_desc.c_str(), &error);
+ if (error) {
+ gst_printerrln ("Could not construct pipeline, error: %s",
+ error->message);
+ exit(1);
+ }
+
+ setter = gst_bin_get_by_name (GST_BIN (pipeline), "setter");
+ if (!setter) {
+ gst_printerrln ("Could not get capssetter from pipeline");
+ exit(1);
+ }
+
+ GstElement *dec = gst_bin_get_by_name (GST_BIN (pipeline), "dec");
+ if (!dec) {
+ gst_printerrln ("Could not get decoder from pipeline");
+ exit(1);
+ }
+
+ GstPad *pad = gst_element_get_static_pad (dec, "src");
+ g_signal_connect (pad, "notify::caps", G_CALLBACK (decoder_caps_notify),
+ nullptr);
+ gst_object_unref (pad);
+ gst_object_unref (dec);
+
+ gst_bus_add_watch (GST_ELEMENT_BUS (pipeline), bus_msg, nullptr);
+
+ /* run the pipeline */
+ GstStateChangeReturn ret =
+ gst_element_set_state (pipeline, GST_STATE_PLAYING);
+ if (ret == GST_STATE_CHANGE_FAILURE) {
+ gst_printerrln ("Pipeline doesn't want to playing");
+ } else {
+ set_key_handler ((KeyInputCallback) keyboard_cb, nullptr);
+ gst_println ("Press k to see supported keyboard inputs");
+ g_main_loop_run (loop);
+ unset_key_handler ();
+ }
+
+ input_lock.lock();
+ gst_clear_object (&setter);
+ input_lock.unlock();
+
+ gst_element_set_state (pipeline, GST_STATE_NULL);
+ gst_bus_remove_watch (GST_ELEMENT_BUS (pipeline));
+
+ gst_object_unref (pipeline);
+ g_main_loop_unref (loop);
+
+ g_free (decoder_name);
+ g_free (encoder_name);
+ g_free (location);
+
+ return 0;
+}
projects / platform / upstream / gstreamer.git / commitdiff