244 lines
9.6 KiB
C++
244 lines
9.6 KiB
C++
#include "gst_ndi.h"
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#include <cstdlib>
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#include <iostream>
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int main(int argc, char *argv[]) {
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CustomData data;
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GstBus *bus;
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GstMessage *msg;
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GstStateChangeReturn ret;
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gboolean terminate = FALSE;
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/* Initialize GStreamer */
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gst_init (&argc, &argv);
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GstElement *my_src = nullptr;
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my_src = gst_element_factory_make ("ndivideosrc", "my_ndi_src");
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std::cout << my_src << std::endl;
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if (!my_src) {
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std::cerr << "Can't create ndivideosrc" << std::endl;
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return -1;
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}
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std::cerr << "ndivideosrc is created with success!" << std::endl;
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GstElement *my_sink = nullptr;
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my_sink = gst_element_factory_make ("autovideosink", "my_sink");
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std::cout << my_sink << std::endl;
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if (!my_sink) {
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std::cerr << "Can't create autovideosink" << std::endl;
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return -1;
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}
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std::cerr << "autovideosink is created with success!" << std::endl;
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GstElement *pipeline = nullptr;
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pipeline = gst_pipeline_new ("test-pipeline");
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std::cout << my_sink << std::endl;
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if (!pipeline) {
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std::cerr << "Can't create pipeline" << std::endl;
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return -1;
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}
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std::cerr << "pipeline is created with success!" << std::endl;
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gst_bin_add_many (GST_BIN (pipeline), my_src, my_sink, NULL);
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std::cout << "here!" << std::endl;
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if (!gst_element_link_many (my_src, my_sink, NULL)) {
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g_printerr ("Elements could not be linked.\n");
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gst_object_unref (pipeline);
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return -1;
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}
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std::cout << "here -2 !" << std::endl;
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// g_object_set (my_src, "ndi-name", "DESKTOP-O5PNOBN (NVIDIA Quadro RTX 5000 1)", NULL);
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// g_object_set (my_src, "ndi-name", "DESKTOP-O5PNOBN (Test Pattern)", NULL);
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g_object_set (my_src, "ndi-name", "DESKTOP-HI0BRMI (Test Pattern)", NULL);
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/* Start playing */
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ret = gst_element_set_state (pipeline, GST_STATE_PLAYING);
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if (ret == GST_STATE_CHANGE_FAILURE) {
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g_printerr ("Unable to set the pipeline to the playing state.\n");
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gst_object_unref (pipeline);
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return -1;
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}
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/* Listen to the bus */
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bus = gst_element_get_bus (pipeline);
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do {
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msg = gst_bus_timed_pop_filtered(
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bus,
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GST_CLOCK_TIME_NONE,
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static_cast<GstMessageType>(GST_MESSAGE_STATE_CHANGED | GST_MESSAGE_ERROR | GST_MESSAGE_EOS | GST_MESSAGE_TAG)
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);
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/* Parse message */
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if (msg != NULL) {
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GError *err;
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gchar *debug_info;
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switch (GST_MESSAGE_TYPE (msg)) {
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case GST_MESSAGE_ERROR:
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gst_message_parse_error (msg, &err, &debug_info);
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g_printerr ("Error received from element %s: %s\n", GST_OBJECT_NAME (msg->src), err->message);
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g_printerr ("Debugging information: %s\n", debug_info ? debug_info : "none");
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g_clear_error (&err);
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g_free (debug_info);
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terminate = TRUE;
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break;
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case GST_MESSAGE_EOS: {
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g_print("End-Of-Stream reached.\n");
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terminate = TRUE;
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break;
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}
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case GST_MESSAGE_TAG: {
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GstTagList *tags = NULL;
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gst_message_parse_tag (msg, &tags);
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g_print ("Got tags from element %s:\n", GST_OBJECT_NAME (msg->src));
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std::cout << "tag" << std::endl;
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// gst_tag_list_foreach (tags, print_one_tag, NULL);
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g_print ("\n");
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gst_tag_list_unref (tags);
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gst_message_unref (msg);
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}
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case GST_MESSAGE_STATE_CHANGED:
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/* We are only interested in state-changed messages from the pipeline */
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if (GST_MESSAGE_SRC (msg) == GST_OBJECT (data.pipeline)) {
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GstState old_state, new_state, pending_state;
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gst_message_parse_state_changed (msg, &old_state, &new_state, &pending_state);
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g_print ("Pipeline state changed from %s to %s:\n",
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gst_element_state_get_name (old_state), gst_element_state_get_name (new_state));
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}
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break;
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default:
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/* We should not reach here */
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g_printerr ("Unexpected message received.\n");
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break;
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}
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gst_message_unref (msg);
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}
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} while (!terminate);
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/* Free resources */
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if (msg != NULL)
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gst_message_unref (msg);
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gst_object_unref (bus);
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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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return 0;
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/* Create the elements */
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data.source = gst_element_factory_make ("uridecodebin", "source");
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data.convert = gst_element_factory_make ("audioconvert", "convert");
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data.resample = gst_element_factory_make ("audioresample", "resample");
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data.sink = gst_element_factory_make ("autoaudiosink", "sink");
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/* Create the empty pipeline */
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data.pipeline = gst_pipeline_new ("test-pipeline");
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if (!data.pipeline || !data.source || !data.convert || !data.resample || !data.sink) {
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g_printerr ("Not all elements could be created.\n");
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return -1;
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}
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/* Build the pipeline. Note that we are NOT linking the source at this
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* point. We will do it later. */
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gst_bin_add_many (GST_BIN (data.pipeline), data.source, data.convert, data.resample, data.sink, NULL);
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if (!gst_element_link_many (data.convert, data.resample, data.sink, NULL)) {
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g_printerr ("Elements could not be linked.\n");
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gst_object_unref (data.pipeline);
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return -1;
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}
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/* Set the URI to play */
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g_object_set (data.source, "uri", "https://www.freedesktop.org/software/gstreamer-sdk/data/media/sintel_trailer-480p.webm", NULL);
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/* Connect to the pad-added signal */
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g_signal_connect (data.source, "pad-added", G_CALLBACK (pad_added_handler), &data);
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/* Start playing */
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ret = gst_element_set_state (data.pipeline, GST_STATE_PLAYING);
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if (ret == GST_STATE_CHANGE_FAILURE) {
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g_printerr ("Unable to set the pipeline to the playing state.\n");
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gst_object_unref (data.pipeline);
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return -1;
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}
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/* Free resources */
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gst_object_unref (bus);
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gst_element_set_state (data.pipeline, GST_STATE_NULL);
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gst_object_unref (data.pipeline);
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return 0;
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}
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/* This function will be called by the pad-added signal */
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static void pad_added_handler (GstElement *src, GstPad *new_pad, CustomData *data) {
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GstPad *sink_pad = gst_element_get_static_pad (data->convert, "sink");
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GstPadLinkReturn ret;
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GstCaps *new_pad_caps = NULL;
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GstStructure *new_pad_struct = NULL;
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const gchar *new_pad_type = NULL;
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g_print ("Received new pad '%s' from '%s':\n", GST_PAD_NAME (new_pad), GST_ELEMENT_NAME (src));
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/* If our converter is already linked, we have nothing to do here */
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if (gst_pad_is_linked (sink_pad)) {
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g_print ("We are already linked. Ignoring.\n");
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goto exit;
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}
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/* Check the new pad's type */
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new_pad_caps = gst_pad_get_current_caps (new_pad);
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new_pad_struct = gst_caps_get_structure (new_pad_caps, 0);
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new_pad_type = gst_structure_get_name (new_pad_struct);
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if (!g_str_has_prefix (new_pad_type, "audio/x-raw")) {
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g_print ("It has type '%s' which is not raw audio. Ignoring.\n", new_pad_type);
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goto exit;
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}
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/* Attempt the link */
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ret = gst_pad_link (new_pad, sink_pad);
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if (GST_PAD_LINK_FAILED (ret)) {
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g_print ("Type is '%s' but link failed.\n", new_pad_type);
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} else {
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g_print ("Link succeeded (type '%s').\n", new_pad_type);
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}
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exit:
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/* Unreference the new pad's caps, if we got them */
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if (new_pad_caps != NULL)
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gst_caps_unref (new_pad_caps);
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/* Unreference the sink pad */
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gst_object_unref (sink_pad);
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}
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void print_one_tag(GstTagList *list, gchar *tag, gpointer user_data) {
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int i, num;
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num = gst_tag_list_get_tag_size (list, tag);
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for (i = 0; i < num; ++i) {
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const GValue *val;
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/* Note: when looking for specific tags, use the gst_tag_list_get_xyz() API,
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* we only use the GValue approach here because it is more generic */
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val = gst_tag_list_get_value_index (list, tag, i);
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if (G_VALUE_HOLDS_STRING (val)) {
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g_print ("\t%20s : %s\n", tag, g_value_get_string (val));
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} else if (G_VALUE_HOLDS_UINT (val)) {
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g_print ("\t%20s : %u\n", tag, g_value_get_uint (val));
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} else if (G_VALUE_HOLDS_DOUBLE (val)) {
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g_print ("\t%20s : %g\n", tag, g_value_get_double (val));
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} else if (G_VALUE_HOLDS_BOOLEAN (val)) {
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g_print ("\t%20s : %s\n", tag,
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(g_value_get_boolean (val)) ? "true" : "false");
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} else if (GST_VALUE_HOLDS_BUFFER (val)) {
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GstBuffer *buf = gst_value_get_buffer (val);
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guint buffer_size = gst_buffer_get_size (buf);
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g_print ("\t%20s : buffer of size %u\n", tag, buffer_size);
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} else if (GST_VALUE_HOLDS_DATE_TIME (val)) {
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// GstDateTime *dt = g_value_get_boxed(val);
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// gchar *dt_str = gst_date_time_to_iso8601_string (dt);
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// g_print ("\t%20s : %s\n", tag, dt_str);
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// g_free (dt_str);
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} else {
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g_print ("\t%20s : tag of type '%s'\n", tag, G_VALUE_TYPE_NAME (val));
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}
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}
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}
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