[gst-devel] compilation issue!

[Stefan Kost]

Guilherme Raymo Longo schrieb:
> 
> Mates, I am having a issue when trying to compile a simple code that
> should work without problems.
> I have it running in other machines, but I can't figure out what it
> might be.


what does this print?
pkg-config --cflags --libs gstreamer-0.10

Besides the code below does not look like spectrum.c :)

Stefan
> 
> 
> This is the output:
> 
> bash-3.1# gcc -Wall $(pkg-config --cflags --libs gstreamer-0.10) spectrum.c
> /tmp/cccrQH9p.o: In function `bus_call':
> spectrum.c:(.text+0xd): undefined reference to `gst_message_get_type'
> spectrum.c:(.text+0x64): undefined reference to `gst_message_parse_error'
> /tmp/cccrQH9p.o: In function `on_pad_added':
> spectrum.c:(.text+0xdd): undefined reference to `gst_element_get_static_pad'
> spectrum.c:(.text+0xf1): undefined reference to `gst_pad_link'
> spectrum.c:(.text+0xff): undefined reference to `gst_object_unref'
> /tmp/cccrQH9p.o: In function `main':
> spectrum.c:(.text+0x12b): undefined reference to `gst_init'
> spectrum.c:(.text+0x17c): undefined reference to `gst_pipeline_new'
> spectrum.c:(.text+0x194): undefined reference to `gst_element_factory_make'
> spectrum.c:(.text+0x1ac): undefined reference to `gst_element_factory_make'
> spectrum.c:(.text+0x1c4): undefined reference to `gst_element_factory_make'
> spectrum.c:(.text+0x1dc): undefined reference to `gst_element_factory_make'
> spectrum.c:(.text+0x1f4): undefined reference to `gst_element_factory_make'
> spectrum.c:(.text+0x26c): undefined reference to `gst_pipeline_get_type'
> spectrum.c:(.text+0x285): undefined reference to `gst_pipeline_get_bus'
> spectrum.c:(.text+0x29e): undefined reference to `gst_bus_add_watch'
> spectrum.c:(.text+0x2ac): undefined reference to `gst_object_unref'
> spectrum.c:(.text+0x2b4): undefined reference to `gst_bin_get_type'
> spectrum.c:(.text+0x2de): undefined reference to `gst_bin_add_many'
> spectrum.c:(.text+0x2ef): undefined reference to `gst_element_link'
> spectrum.c:(.text+0x302): undefined reference to `gst_element_link_many'
> spectrum.c:(.text+0x34e): undefined reference to `gst_element_set_state'
> spectrum.c:(.text+0x38c): undefined reference to `gst_element_set_state'
> spectrum.c:(.text+0x3a4): undefined reference to `gst_object_get_type'
> spectrum.c:(.text+0x3bd): undefined reference to `gst_object_unref'
> collect2: ld returned 1 exit status
> 
> 
> 
> I have the PKG_CONFIG_PATH duly configured and gstreamer-0.10 libraries
> are installed. What am I missing here??????
> 
> This is the code:
> 
> #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;
> }
> 
> 
> 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");
> 
>   gst_pad_link (pad, sinkpad);
> 
>   gst_object_unref (sinkpad);
> }
> 
> 
> 
> int
> main (int   argc,
>       char *argv[])
> {
>   GMainLoop *loop;
> 
>   GstElement *pipeline, *source, *demuxer, *decoder, *conv, *sink;
>   GstBus *bus;
> 
>   /* Initialisation */
>   gst_init (&argc, &argv);
> 
>   loop = g_main_loop_new (NULL, FALSE);
> 
> 
>   /* Check input arguments */
>   if (argc != 2) {
>     g_printerr ("Usage: %s <Ogg/Vorbis filename>\n", argv[0]);
>     return -1;
>   }
> 
> 
>   /* Create gstreamer elements */
>   pipeline = gst_pipeline_new ("audio-player");
>   source   = gst_element_factory_make ("filesrc",       "file-source");
>   demuxer  = gst_element_factory_make ("oggdemux",      "ogg-demuxer");
>   decoder  = gst_element_factory_make ("vorbisdec",     "vorbis-decoder");
>   conv     = gst_element_factory_make ("audioconvert",  "converter");
>   sink     = gst_element_factory_make ("autoaudiosink", "audio-output");
> 
>   if (!pipeline || !source || !demuxer || !decoder || !conv || !sink) {
>     g_printerr ("One element could not be created. Exiting.\n");
>     return -1;
>   }
> 
>   /* Set up the pipeline */
> 
>   /* we set the input filename to the source element */
>   g_object_set (G_OBJECT (source), "location", argv[1], NULL);
> 
>   /* 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);
> 
>   /* we add all elements into the pipeline */
>   /* file-source | ogg-demuxer | vorbis-decoder | converter | alsa-output */
>   gst_bin_add_many (GST_BIN (pipeline),
>                     source, demuxer, decoder, conv, sink, NULL);
> 
>   /* we link the elements together */
>   /* file-source -> ogg-demuxer ~> vorbis-decoder -> converter ->
> alsa-output */
>   gst_element_link (source, demuxer);
>   gst_element_link_many (decoder, conv, sink, NULL);
>   g_signal_connect (demuxer, "pad-added", G_CALLBACK (on_pad_added),
> decoder);
> 
>   /* note that the demuxer will be linked to the decoder dynamically.
>      The reason is that Ogg may contain various streams (for example
>      audio and video). The source pad(s) will be created at run time,
>      by the demuxer when it detects the amount and nature of streams.
>      Therefore we connect a callback function which will be executed
>      when the "pad-added" is emitted.*/
> 
> 
>   /* Set the pipeline to "playing" state*/
>   g_print ("Now playing: %s\n", argv[1]);
>   gst_element_set_state (pipeline, GST_STATE_PLAYING);
> 
> 
>   /* Iterate */
>   g_print ("Running...\n");
>   g_main_loop_run (loop);
> 
> 
>   /* Out of the main loop, clean up nicely */
>   g_print ("Returned, stopping playback\n");
>   gst_element_set_state (pipeline, GST_STATE_NULL);
> 
>   g_print ("Deleting pipeline\n");
>   gst_object_unref (GST_OBJECT (pipeline));
> 
>   return 0;
> }
> 
> 
> Tks so much!
> 
> 
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