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Ejercicio3.c
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Ejercicio3.c
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/*
Ejercicio3.c
Reproduce video en formato .ogv, anyade relog con la hora actual
y aplica un filtro de color en sepia
*/
#include <gst/gst.h>
#include <glib.h>
static gboolean bus_call
(GstBus *bus,
GstMessage *msg,
gpointer data)
{
GMainLoop *loop = (GMainLoop *) data;
switch (GST_MESSAGE_TYPE (msg)) {
case GST_MESSAGE_EOS:
g_print ("End of stream\n");
g_main_loop_quit (loop);
break;
case GST_MESSAGE_ERROR: {
gchar *debug;
GError *error;
gst_message_parse_error (msg, &error, &debug);
g_free (debug);
g_printerr ("Error: %s\n", error->message);
g_error_free (error);
g_main_loop_quit (loop);
break;
}
default:
break;
}
return TRUE;
}
/* g_signal_connect (demuxer, "pad-added", G_CALLBACK (on_pad_added), decoder);*/
static void on_pad_added (GstElement *element, GstPad *pad, gpointer data){
GstPad *sinkpad;
GstElement *decoder = (GstElement *) data;
/* We can now link this pad with the vorbis-decoder sink pad */
g_print ("Dynamic pad created, linking demuxer/decoder\n");
sinkpad = gst_element_get_static_pad (decoder, "sink"); // Solicita un sink-pad al decodificador
gst_pad_link (pad, sinkpad);
gst_object_unref (sinkpad);
}
int
main (int argc,
char *argv[])
{
GMainLoop *loop;
GstElement *pipeline, *source, *demuxer, *decoder, *conv1, *conv2, *sink, *filtro_sepia;
GstElement * hora;
GstBus *bus;
//Initialisation
gst_init (&argc, &argv);
loop = g_main_loop_new (NULL, FALSE);
/* Comprobamos argumentos */
if (argc != 2) {
g_printerr ("Usage: %s <Ogg/Vorbis filename>\n", argv[0]);
return -1;
}
/* Se crean los elementos gstreamer */
pipeline = gst_pipeline_new ("test_pipeline");
source = gst_element_factory_make ("filesrc", "file-source");
demuxer = gst_element_factory_make ("oggdemux", "ogg-demuxer");
decoder = gst_element_factory_make ("theoradec", "theoradec-decoder");
hora = gst_element_factory_make ("clockoverlay", "hora_actual");
filtro_sepia = gst_element_factory_make ("coloreffects", "filtro-sepia");
conv1 = gst_element_factory_make ("videoconvert", "converter1");
conv2 = gst_element_factory_make ("videoconvert", "converter2");
sink = gst_element_factory_make ("ximagesink", "video_out");
if (!pipeline || !source || !demuxer || !decoder || !hora || !filtro_sepia || !conv1 || !conv2 || !sink) {
g_printerr ("One element could not be created. Exiting.\n");
return -1;
}
/* we set the input filename to the source element */
g_object_set (G_OBJECT (source), "location", argv[1], NULL);
// Cambiamos propiedad para que aparezca grande la hora actual
g_object_set (G_OBJECT(hora), "auto-resize", FALSE, NULL);
// Filtro Sepia
g_object_set (G_OBJECT(filtro_sepia), "preset", 2, NULL);
//Set up the pipeline
//we set the input filename to the source element
//we add a message handler
bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
gst_bus_add_watch (bus, bus_call, loop);
gst_object_unref (bus);
/* anyadimos todos los elementos al pipeline*/
/* file-source | ogg-demuxer | theoradec-decoder | hora_actual | converter | filtro_sepia | converter | video_out */
gst_bin_add_many (GST_BIN (pipeline), source, demuxer, decoder, hora, conv1, filtro_sepia, conv2, sink, NULL);
/* we link the elements together */
/* file-source -> ogg-demuxer -> vorbis-decoder -> hora -> conv1 -> filtro_sepia -> conv2 -> video_sink */
gst_element_link (source, demuxer);
gst_element_link_many (decoder, hora, conv1, filtro_sepia, conv2, sink, NULL);
g_signal_connect (demuxer, "pad-added", G_CALLBACK (on_pad_added), decoder);
//Set the pipeline to "playing" state
gst_element_set_state (pipeline, GST_STATE_PLAYING);
//Iterate
g_main_loop_run (loop);
// Out of the main loop, clean up nicely
gst_element_set_state (pipeline, GST_STATE_NULL);
gst_object_unref (GST_OBJECT (pipeline));
return 0;
}