mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-09-20 11:00:16 +00:00
116 lines
2.9 KiB
C
116 lines
2.9 KiB
C
#include <stdio.h>
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#include <string.h>
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#include <gst/gst.h>
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typedef struct _CustomData
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{
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GstElement *pipeline;
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GstElement *video_sink;
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GstElement *src_sink;
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GMainLoop *loop;
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GstPad *src_pad;
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gboolean orient_automatic;
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} AppData;
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static void
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send_rotate_event (AppData * data)
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{
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gboolean res = FALSE;
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GstEvent *event;
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static gint counter = 0;
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const static gchar *tags[] = { "rotate-90", "rotate-180", "rotate-270",
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"rotate-0"
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};
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event = gst_event_new_tag (gst_tag_list_new (GST_TAG_IMAGE_ORIENTATION,
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tags[counter++ % G_N_ELEMENTS (tags)], NULL));
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/* Send the event */
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res = gst_pad_push_event (data->src_pad, event);
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g_print ("Sending event %p done: %d\n", event, res);
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}
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/* Process keyboard input */
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static gboolean
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handle_keyboard (GIOChannel * source, GIOCondition cond, AppData * data)
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{
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gchar *str = NULL;
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if (g_io_channel_read_line (source, &str, NULL, NULL,
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NULL) != G_IO_STATUS_NORMAL) {
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return TRUE;
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}
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switch (g_ascii_tolower (str[0])) {
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case 'r':
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send_rotate_event (data);
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break;
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case 's':{
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g_object_set (G_OBJECT (data->video_sink), "rotation", 360, NULL);
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break;
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}
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case 'q':
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g_main_loop_quit (data->loop);
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break;
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default:
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break;
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}
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g_free (str);
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return TRUE;
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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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AppData data;
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GstStateChangeReturn ret;
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GIOChannel *io_stdin;
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/* Initialize GStreamer */
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gst_init (&argc, &argv);
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/* Initialize our data structure */
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memset (&data, 0, sizeof (data));
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/* Print usage map */
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g_print ("USAGE: Choose one of the following options, then press enter:\n"
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" 'r' to send image-orientation tag event\n \
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's' to set orient-automatic\n \
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'Q' to quit\n");
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data.pipeline =
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gst_parse_launch
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("videotestsrc name=src ! vaapisink name=vaapisink", NULL);
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data.video_sink = gst_bin_get_by_name (GST_BIN (data.pipeline), "vaapisink");
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data.src_sink = gst_bin_get_by_name (GST_BIN (data.pipeline), "src");
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data.src_pad = gst_element_get_static_pad (data.src_sink, "src");
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/* Add a keyboard watch so we get notified of keystrokes */
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io_stdin = g_io_channel_unix_new (fileno (stdin));
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g_io_add_watch (io_stdin, G_IO_IN, (GIOFunc) handle_keyboard, &data);
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/* Start playing */
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ret = gst_element_set_state (data.pipeline, GST_STATE_PLAYING);
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if (ret == GST_STATE_CHANGE_FAILURE) {
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g_printerr ("Unable to set the pipeline to the playing state.\n");
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gst_object_unref (data.pipeline);
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return -1;
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}
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/* Create a GLib Main Loop and set it to run */
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data.loop = g_main_loop_new (NULL, FALSE);
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g_main_loop_run (data.loop);
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/* Free resources */
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g_main_loop_unref (data.loop);
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g_io_channel_unref (io_stdin);
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gst_element_set_state (data.pipeline, GST_STATE_NULL);
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if (data.video_sink != NULL)
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gst_object_unref (data.video_sink);
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gst_object_unref (data.pipeline);
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return 0;
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}
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