// 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;
}
