mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-07-03 05:05:52 +00:00
77 lines
2.2 KiB
C
77 lines
2.2 KiB
C
#include <gst/gst.h>
|
|
|
|
#ifdef __APPLE__
|
|
#include <TargetConditionals.h>
|
|
#endif
|
|
|
|
int
|
|
tutorial_main (int argc, char *argv[])
|
|
{
|
|
GstElement *pipeline, *bin, *equalizer, *convert, *sink;
|
|
GstPad *pad, *ghost_pad;
|
|
GstBus *bus;
|
|
GstMessage *msg;
|
|
|
|
/* Initialize GStreamer */
|
|
gst_init (&argc, &argv);
|
|
|
|
/* Build the pipeline */
|
|
pipeline =
|
|
gst_parse_launch
|
|
("playbin uri=https://gstreamer.freedesktop.org/data/media/sintel_trailer-480p.webm",
|
|
NULL);
|
|
|
|
/* Create the elements inside the sink bin */
|
|
equalizer = gst_element_factory_make ("equalizer-3bands", "equalizer");
|
|
convert = gst_element_factory_make ("audioconvert", "convert");
|
|
sink = gst_element_factory_make ("autoaudiosink", "audio_sink");
|
|
if (!equalizer || !convert || !sink) {
|
|
g_printerr ("Not all elements could be created.\n");
|
|
return -1;
|
|
}
|
|
|
|
/* Create the sink bin, add the elements and link them */
|
|
bin = gst_bin_new ("audio_sink_bin");
|
|
gst_bin_add_many (GST_BIN (bin), equalizer, convert, sink, NULL);
|
|
gst_element_link_many (equalizer, convert, sink, NULL);
|
|
pad = gst_element_get_static_pad (equalizer, "sink");
|
|
ghost_pad = gst_ghost_pad_new ("sink", pad);
|
|
gst_pad_set_active (ghost_pad, TRUE);
|
|
gst_element_add_pad (bin, ghost_pad);
|
|
gst_object_unref (pad);
|
|
|
|
/* Configure the equalizer */
|
|
g_object_set (G_OBJECT (equalizer), "band1", (gdouble) - 24.0, NULL);
|
|
g_object_set (G_OBJECT (equalizer), "band2", (gdouble) - 24.0, NULL);
|
|
|
|
/* Set playbin2's audio sink to be our sink bin */
|
|
g_object_set (GST_OBJECT (pipeline), "audio-sink", bin, NULL);
|
|
|
|
/* Start playing */
|
|
gst_element_set_state (pipeline, GST_STATE_PLAYING);
|
|
|
|
/* Wait until error or EOS */
|
|
bus = gst_element_get_bus (pipeline);
|
|
msg =
|
|
gst_bus_timed_pop_filtered (bus, GST_CLOCK_TIME_NONE,
|
|
GST_MESSAGE_ERROR | GST_MESSAGE_EOS);
|
|
|
|
/* Free resources */
|
|
if (msg != NULL)
|
|
gst_message_unref (msg);
|
|
gst_object_unref (bus);
|
|
gst_element_set_state (pipeline, GST_STATE_NULL);
|
|
gst_object_unref (pipeline);
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
main (int argc, char *argv[])
|
|
{
|
|
#if defined(__APPLE__) && TARGET_OS_MAC && !TARGET_OS_IPHONE
|
|
return gst_macos_main (tutorial_main, argc, argv, NULL);
|
|
#else
|
|
return tutorial_main (argc, argv);
|
|
#endif
|
|
}
|