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Posted By

felipec on 01/19/08


Tagged

multimedia gstreamer


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jeffhung


GStreamer hello world

Published in: C++ 

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  1. #include <gst/gst.h>
  2. #include <stdbool.h>
  3.  
  4. static GMainLoop *loop;
  5.  
  6. static gboolean
  7. bus_call (GstBus *bus,
  8.           GstMessage *msg,
  9.           gpointer user_data)
  10. {
  11.     switch (GST_MESSAGE_TYPE (msg))
  12.     {
  13.         case GST_MESSAGE_EOS:
  14.             {
  15.                 g_message ("End-of-stream");
  16.                 g_main_loop_quit (loop);
  17.                 break;
  18.             }
  19.         case GST_MESSAGE_ERROR:
  20.             {
  21.                 gchar *debug;
  22.                 GError *err;
  23.  
  24.                 gst_message_parse_error (msg, &err, &debug);
  25.                 g_free (debug);
  26.  
  27.                 g_error ("%s", err->message);
  28.                 g_error_free (err);
  29.  
  30.                 g_main_loop_quit (loop);
  31.                 break;
  32.             }
  33.         default:
  34.             break;
  35.     }
  36.  
  37.     return true;
  38. }
  39.  
  40. void
  41. play_uri (gchar *uri)
  42. {
  43.     GstElement *pipeline;
  44.  
  45.     loop = g_main_loop_new (NULL, FALSE);
  46.  
  47.     pipeline = gst_element_factory_make ("playbin", "player");
  48.  
  49.     if (uri)
  50.     {
  51.         g_object_set (G_OBJECT (pipeline), "uri", uri, NULL);
  52.     }
  53.  
  54.     {
  55.         GstBus *bus;
  56.  
  57.         bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
  58.         gst_bus_add_watch (bus, bus_call, NULL);
  59.         gst_object_unref (bus);
  60.     }
  61.  
  62.     gst_element_set_state (GST_ELEMENT (pipeline), GST_STATE_PLAYING);
  63.  
  64.     g_main_loop_run (loop);
  65.  
  66.     gst_element_set_state (GST_ELEMENT (pipeline), GST_STATE_NULL);
  67.     gst_object_unref (GST_OBJECT (pipeline));
  68. }
  69.  
  70. int
  71. main (int argc,
  72.       char *argv[])
  73. {
  74.     gst_init (&argc, &argv);
  75.  
  76.     play_uri (argv[1]);
  77.  
  78.     return 0;
  79. }

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