// start and end should be expressed in milliseconds void GstPlayer::setFade(GstController * & controller,long start,long end,double from,double to){ QLOG_TRACE() << this << "GstPlayer::setFade " << start << " ->" << end << ", "<< from << " -> " << to; //g_value_init(theVol,G_TYPE_DOUBLE); if(!(controller = gst_controller_new(G_OBJECT(volume),"volume",NULL))){ QLOG_ERROR() << "Can't get a controller for fade purposes"; return; } gst_controller_set_interpolation_mode(controller,"volume",GST_INTERPOLATE_LINEAR); g_value_set_double(theVol,from); gst_controller_set(controller,"volume",start*GST_MSECOND,theVol); g_value_set_double(theVol,to); gst_controller_set(controller,"volume",end*GST_MSECOND,theVol); }
gint main (gint argc, gchar ** argv) { gint res = 1; GstElement *src, *sink; GstElement *bin; GstController *ctrl; GstInterpolationControlSource *csource1, *csource2; GstClock *clock; GstClockID clock_id; GstClockReturn wait_ret; GValue vol = { 0, }; gst_init (&argc, &argv); gst_controller_init (&argc, &argv); /* build pipeline */ bin = gst_pipeline_new ("pipeline"); clock = gst_pipeline_get_clock (GST_PIPELINE (bin)); src = gst_element_factory_make ("audiotestsrc", "gen_audio"); if (!src) { GST_WARNING ("need audiotestsrc from gst-plugins-base"); goto Error; } sink = gst_element_factory_make ("autoaudiosink", "play_audio"); if (!sink) { GST_WARNING ("need autoaudiosink from gst-plugins-base"); goto Error; } gst_bin_add_many (GST_BIN (bin), src, sink, NULL); if (!gst_element_link (src, sink)) { GST_WARNING ("can't link elements"); goto Error; } /* square wave g_object_set (G_OBJECT(src), "wave", 1, NULL); */ /* add a controller to the source */ if (!(ctrl = gst_controller_new (G_OBJECT (src), "freq", "volume", NULL))) { GST_WARNING ("can't control source element"); goto Error; } csource1 = gst_interpolation_control_source_new (); csource2 = gst_interpolation_control_source_new (); gst_controller_set_control_source (ctrl, "volume", GST_CONTROL_SOURCE (csource1)); gst_controller_set_control_source (ctrl, "freq", GST_CONTROL_SOURCE (csource2)); /* Set interpolation mode */ gst_interpolation_control_source_set_interpolation_mode (csource1, GST_INTERPOLATE_LINEAR); gst_interpolation_control_source_set_interpolation_mode (csource2, GST_INTERPOLATE_LINEAR); /* set control values */ g_value_init (&vol, G_TYPE_DOUBLE); g_value_set_double (&vol, 0.0); gst_interpolation_control_source_set (csource1, 0 * GST_SECOND, &vol); g_value_set_double (&vol, 1.0); gst_interpolation_control_source_set (csource1, 5 * GST_SECOND, &vol); g_object_unref (csource1); g_value_set_double (&vol, 220.0); gst_interpolation_control_source_set (csource2, 0 * GST_SECOND, &vol); g_value_set_double (&vol, 3520.0); gst_interpolation_control_source_set (csource2, 3 * GST_SECOND, &vol); g_value_set_double (&vol, 440.0); gst_interpolation_control_source_set (csource2, 6 * GST_SECOND, &vol); g_object_unref (csource2); clock_id = gst_clock_new_single_shot_id (clock, gst_clock_get_time (clock) + (7 * GST_SECOND)); /* run for 7 seconds */ if (gst_element_set_state (bin, GST_STATE_PLAYING)) { if ((wait_ret = gst_clock_id_wait (clock_id, NULL)) != GST_CLOCK_OK) { GST_WARNING ("clock_id_wait returned: %d", wait_ret); } gst_element_set_state (bin, GST_STATE_NULL); } /* cleanup */ g_object_unref (G_OBJECT (ctrl)); gst_clock_id_unref (clock_id); gst_object_unref (G_OBJECT (clock)); gst_object_unref (G_OBJECT (bin)); res = 0; Error: return (res); }
gint main (gint argc, gchar ** argv) { GstElement *pipeline; GstElement *shapewipe; GstController *ctrl; GstLFOControlSource *csource; GValue val = { 0, }; GMainLoop *loop; GstBus *bus; gchar *pipeline_string; if (argc != 2) { g_print ("Usage: shapewipe mask.png\n"); return -1; } gst_init (&argc, &argv); gst_controller_init (&argc, &argv); pipeline_string = g_strdup_printf ("videotestsrc ! video/x-raw-yuv,width=640,height=480 ! shapewipe name=shape border=0.05 ! videomixer name=mixer ! ffmpegcolorspace ! autovideosink filesrc location=%s ! typefind ! decodebin2 ! ffmpegcolorspace ! videoscale ! queue ! shape.mask_sink videotestsrc pattern=snow ! video/x-raw-yuv,width=640,height=480 ! queue ! mixer.", argv[1]); pipeline = gst_parse_launch (pipeline_string, NULL); g_free (pipeline_string); if (pipeline == NULL) { g_print ("Failed to create pipeline\n"); return -2; } shapewipe = gst_bin_get_by_name (GST_BIN (pipeline), "shape"); if (!(ctrl = gst_controller_new (G_OBJECT (shapewipe), "position", NULL))) { g_print ("can't control shapewipe element\n"); return -3; } csource = gst_lfo_control_source_new (); gst_controller_set_control_source (ctrl, "position", GST_CONTROL_SOURCE (csource)); g_value_init (&val, G_TYPE_FLOAT); g_value_set_float (&val, 0.5); g_object_set (G_OBJECT (csource), "amplitude", &val, NULL); g_value_set_float (&val, 0.5); g_object_set (G_OBJECT (csource), "offset", &val, NULL); g_value_unset (&val); g_object_set (G_OBJECT (csource), "frequency", 0.5, NULL); g_object_set (G_OBJECT (csource), "timeshift", 500 * GST_MSECOND, NULL); g_object_unref (csource); loop = g_main_loop_new (NULL, FALSE); bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline)); gst_bus_add_signal_watch (bus); g_signal_connect (G_OBJECT (bus), "message", G_CALLBACK (on_message), loop); gst_object_unref (GST_OBJECT (bus)); if (gst_element_set_state (pipeline, GST_STATE_PLAYING) == GST_STATE_CHANGE_FAILURE) { g_error ("Failed to go into PLAYING state"); return -4; } g_main_loop_run (loop); gst_element_set_state (pipeline, GST_STATE_NULL); g_main_loop_unref (loop); g_object_unref (G_OBJECT (ctrl)); gst_object_unref (G_OBJECT (pipeline)); return 0; }