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