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3bb8700577
On macOS, a Cocoa event loop is needed in the main thread to ensure things like opening a GL window work correctly. In the past, this was patched into glib via Cerbero, but that prevented us from updating it. This workaround simply runs an NSApplication and then calls the main function on a secondary thread, allowing GStreamer to correctly display windows and/or system permission prompts, for example. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3532>
76 lines
2.2 KiB
C
76 lines
2.2 KiB
C
#include <gst/gst.h>
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#ifdef __APPLE__
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#include <TargetConditionals.h>
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#endif
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int
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tutorial_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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int
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main (int argc, char *argv[])
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{
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#if defined(__APPLE__) && TARGET_OS_MAC && !TARGET_OS_IPHONE
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return gst_macos_main (tutorial_main, argc, argv, NULL);
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#else
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return tutorial_main (argc, argv);
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#endif
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}
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