[gst-devel] compilation issue!
Guilherme
grlongo.ireland at gmail.com
Sun May 24 15:21:32 CEST 2009
It is not ;O)
But you probably noticed that I was just trying different codes to see
if things worked out in here ;O)!
The output is this:
pkg-config --cflags --libs gstreamer-0.10
-pthread -I/usr/include/gstreamer-0.10 -I/usr/include/glib-2.0
-I/usr/lib/glib-2.0/include -I/usr/include/libxml2 -pthread
-lgstreamer-0.10 -lgobject-2.0 -lgmodule-2.0 -lgthread-2.0 -lrt -lxml2
-lglib-2.0
It seems that the paths are right.... strange!
Tks!
-------------------
Guilherme Longo
Dept. Eng. da Computação
Unaerp
Linux User - #484927
*Before Asking
http://www.istf.com.br/?page=perguntas
!- I'd rather die on my feet than live on my knees -!
Stefan Kost wrote:
> 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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>>
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>>
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>>
>
>
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> is a gathering of tech-side developers & brand creativity professionals. Meet
> the minds behind Google Creative Lab, Visual Complexity, Processing, &
> iPhoneDevCamp asthey present alongside digital heavyweights like Barbarian
> Group, R/GA, & Big Spaceship. http://www.creativitycat.com
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