diff options
Diffstat (limited to 'examples/dynparams')
| -rw-r--r-- | examples/dynparams/.gitignore | 1 | ||||
| -rw-r--r-- | examples/dynparams/Makefile.am | 7 | ||||
| -rw-r--r-- | examples/dynparams/filter.c | 522 |
3 files changed, 0 insertions, 530 deletions
diff --git a/examples/dynparams/.gitignore b/examples/dynparams/.gitignore deleted file mode 100644 index 76f654ef..00000000 --- a/examples/dynparams/.gitignore +++ /dev/null @@ -1 +0,0 @@ -filter diff --git a/examples/dynparams/Makefile.am b/examples/dynparams/Makefile.am deleted file mode 100644 index 07314087..00000000 --- a/examples/dynparams/Makefile.am +++ /dev/null @@ -1,7 +0,0 @@ -examples = filter - -noinst_PROGRAMS = $(examples) - -# we have nothing but apps here, we can do this safely -LIBS = $(GST_LIBS) $(GTK_LIBS) $(GST_CONTROL_LIBS) -AM_CFLAGS = $(GST_CFLAGS) $(GTK_CFLAGS) diff --git a/examples/dynparams/filter.c b/examples/dynparams/filter.c deleted file mode 100644 index 087a5b28..00000000 --- a/examples/dynparams/filter.c +++ /dev/null @@ -1,522 +0,0 @@ -/* - * filter.c - * - * demo application for filters using dparams - * dparams get their sliders which you can play with - * - * you can also enter an input and output part of a pipeline - */ - -#ifdef HAVE_CONFIG_H -#include "config.h" -#endif -#include <string.h> -#include <gtk/gtk.h> -#include <gst/gst.h> -#include <gst/control/control.h> - -/* filter UI data */ -struct _filter_ui -{ - GtkWidget *window; /* top-level interface window */ - - GtkWidget *buttons; /* all of the control buttons */ - GtkWidget *parse, *play, *stop; /* control buttons */ - - GtkWidget *feedback; /* here's where we'll tell you stuff */ - GtkTextBuffer *fb_buffer; /* feedback buffer */ - GtkWidget *selection; /* the place to input element stuff */ - GtkWidget *input, *filter, *output; /* the selection widgets */ - - GtkWidget *control; /* the dynamically generated control UI */ -}; - -typedef struct _filter_ui _filter_ui_t; - -/* back-end data */ -struct _filter_data -{ - _filter_ui_t *ui; /* the UI data */ - gchar *input_pipe, *output_pipe, *filter_element; - gchar *pipe_string; - GList *filter_choices; - - gboolean playing; - GstElement *input, *output; /* these are in and out bins */ - GstElement *pipeline; - GstElement *filter; -}; - -typedef struct _filter_data _filter_data_t; - -/* internal prototypes when they can't be avoided */ -void cb_remove_and_destroy (GtkWidget * widget, gpointer user_data); - -//void cb_dynparm_value_changed (GtkWidget *widget, gpointer user_data); -void cb_dynparm_value_changed (GtkRange * range, GstDParam * dparam); - -/* GStreamer helper functions go here */ - -/* go through a bin, finding the one pad that is unconnected in the given - * direction, and return a ghost pad */ -GstPad * -gst_bin_find_unconnected_pad (GstBin * bin, GstPadDirection direction, - gchar * name) -{ - GstPad *pad = NULL; - GList *elements = NULL; - const GList *pads = NULL; - GstElement *element = NULL; - - g_print ("DEBUG: find_unconnected start\n"); - elements = (GList *) gst_bin_get_list (bin); - /* traverse all elements looking for unconnected pads */ - while (elements && pad == NULL) { - element = GST_ELEMENT (elements->data); - g_print ("DEBUG: looking in element %s\n", gst_element_get_name (element)); - pads = gst_element_get_pad_list (element); - while (pads) { - /* check if the direction matches */ - if (GST_PAD_DIRECTION (GST_PAD (pads->data)) == direction) { - if (GST_PAD_PEER (GST_PAD (pads->data)) == NULL) { - /* found it ! */ - g_print ("DEBUG: found an unconnected pad !\n"); - pad = GST_PAD (pads->data); - } - } - if (pad) - break; /* found one already */ - pads = g_list_next (pads); - } - elements = g_list_next (elements); - } - - g_print ("DEBUG: find_unconnected stop\n"); - if (pad == NULL) /* we didn't find it at all */ - return NULL; - - pad = gst_ghost_pad_new (name, pad); - return pad; -} - -void -ui_feedback_add_text (_filter_ui_t * ui, const gchar * text) -{ - GtkTextIter iter; - - gtk_text_buffer_get_end_iter (ui->fb_buffer, &iter); - gtk_text_buffer_insert (ui->fb_buffer, &iter, text, -1); -} - -void -ui_feedback_add (_filter_ui_t * ui, const gchar * format, ...) -{ - va_list args; - gchar *buffer = NULL; - - va_start (args, format); - buffer = g_strdup_vprintf (format, args); - va_end (args); - ui_feedback_add_text (ui, buffer); - g_free (buffer); -} - -void -ui_feedback_clear (_filter_ui_t * ui) -{ - gtk_text_buffer_set_text (ui->fb_buffer, "", 0); -} - -/* create the control widget using the element's dynparams - * control is a vbox which we need to empty first */ -void -ui_control_create (GstElement * element, GtkWidget * control, _filter_ui_t * ui) -{ - GtkWidget *hbox = NULL; - GtkWidget *widget = NULL; - GstDParamManager *dpman = NULL; - GstDParam *dparam = NULL; - GParamSpec **specs = NULL; - int i = 0; - - g_assert (GTK_IS_VBOX (control)); - - /* empty control vbox */ - g_print ("DEBUG: emptying control widget\n"); - gtk_container_foreach (GTK_CONTAINER (control), cb_remove_and_destroy, - (gpointer) control); - - g_print ("DEBUG: adding label to control widget\n"); - widget = gtk_label_new ("Dynamic Parameters"); - gtk_container_add (GTK_CONTAINER (control), widget); - gtk_widget_show (widget); - - if ((dpman = gst_dpman_get_manager (element))) { - ui_feedback_add (ui, "Found Dynamic Parameters on filter element.\n"); - specs = gst_dpman_list_dparam_specs (dpman); - for (i = 0; specs[i] != NULL; ++i) { - hbox = gtk_hbox_new (FALSE, 0); - widget = gtk_label_new (g_param_spec_get_name (specs[i])); - gtk_container_add (GTK_CONTAINER (hbox), widget); - gtk_widget_show (widget); - switch (G_PARAM_SPEC_VALUE_TYPE (specs[i])) { - case G_TYPE_INT64: - widget = gtk_hscale_new_with_range ( - (gdouble) (((GParamSpecInt64 *) specs[i])->minimum), - (gdouble) (((GParamSpecInt64 *) specs[i])->maximum), 1.0); - gtk_range_set_value (GTK_RANGE (widget), - (gdouble) ((GParamSpecInt64 *) specs[i])->default_value); - break; - - case G_TYPE_INT: - widget = gtk_hscale_new_with_range ( - (gdouble) (((GParamSpecInt *) specs[i])->minimum), - (gdouble) (((GParamSpecInt *) specs[i])->maximum), 1.0); - gtk_range_set_value (GTK_RANGE (widget), - (gdouble) ((GParamSpecInt *) specs[i])->default_value); - break; - case G_TYPE_FLOAT: - widget = gtk_hscale_new_with_range ( - (gdouble) (((GParamSpecFloat *) specs[i])->minimum), - (gdouble) (((GParamSpecFloat *) specs[i])->maximum), 0.00001); - gtk_range_set_value (GTK_RANGE (widget), - (gdouble) ((GParamSpecFloat *) specs[i])->default_value); - break; - } - /* create the dparam object */ - dparam = gst_dpsmooth_new (G_PARAM_SPEC_VALUE_TYPE (specs[i])); - g_object_set (G_OBJECT (dparam), "update_period", 2000000LL, NULL); - if (!gst_dpman_attach_dparam (dpman, - (gchar *) g_param_spec_get_name (specs[i]), dparam)) - g_assert_not_reached (); - gst_dpman_set_mode (dpman, "asynchronous"); - g_signal_connect (widget, "value-changed", - G_CALLBACK (cb_dynparm_value_changed), dparam); - cb_dynparm_value_changed (GTK_RANGE (widget), dparam); - - gtk_container_add (GTK_CONTAINER (hbox), widget); - gtk_widget_show (widget); - } - gtk_container_add (GTK_CONTAINER (control), hbox); - gtk_widget_show (hbox); - } -} - -/* all the pretty callbacks gather here please */ -void -cb_remove_and_destroy (GtkWidget * widget, gpointer user_data) -{ - GtkContainer *container = GTK_CONTAINER (user_data); - - g_print ("DEBUG: trying to remove widget from a container.\n"); - gtk_container_remove (container, widget); - gtk_widget_destroy (widget); -} - -/* when the scale associated with a dparam changes, respond */ -void -cb_dynparm_value_changed (GtkRange * range, GstDParam * dparam) -{ - /* - GstDParam *dparam = GST_DPARAM (user_data); - GtkHScale *adj = GTK_HSCALE (widget); - */ - gdouble value = 0.0; - - g_assert (GST_IS_DPARAM (dparam)); - g_assert (GTK_IS_RANGE (range)); - - value = gtk_range_get_value (range); - - g_print ("DEBUG: setting value to %f\n", value); - - switch (G_PARAM_SPEC_VALUE_TYPE (GST_DPARAM_PARAM_SPEC (dparam))) { - case G_TYPE_INT64: - g_object_set (G_OBJECT (dparam), "value_int64", (gint64) value, NULL); - break; - - case G_TYPE_INT: - g_object_set (G_OBJECT (dparam), "value_int", (gint) value, NULL); - break; - - case G_TYPE_FLOAT: - g_object_set (G_OBJECT (dparam), "value_float", (gfloat) value, NULL); - break; - } -} - - -void -cb_entry_activate (GtkEntry * entry, gpointer user_data) -{ - g_print ("DEBUG: oi ! you activated an entry !\n"); - g_print ("DEBUG: pipeline: %s\n", gtk_entry_get_text (entry)); -} - -void -cb_play_clicked (GtkButton * button, gpointer * user_data) -{ - _filter_data_t *fd = (_filter_data_t *) user_data; - - g_return_if_fail (GST_IS_PIPELINE (fd->pipeline)); - if (GST_STATE (fd->pipeline) == GST_STATE_PLAYING) { - ui_feedback_add (fd->ui, "Pipeline is already playing !\n"); - return; - } - gst_element_set_state (fd->pipeline, GST_STATE_PLAYING); -} - -void -cb_stop_clicked (GtkButton * button, gpointer * user_data) -{ - _filter_data_t *fd = (_filter_data_t *) user_data; - - if (GST_STATE (fd->pipeline) != GST_STATE_PLAYING) { - ui_feedback_add (fd->ui, "Pipeline is not playing !\n"); - return; - } - gst_element_set_state (fd->pipeline, GST_STATE_NULL); -} - -void -cb_parse_clicked (GtkButton * button, gpointer * user_data) -{ - _filter_data_t *fd = (_filter_data_t *) user_data; - GtkCombo *filter = GTK_COMBO (fd->ui->filter); - GError *error = NULL; - GstPad *src_pad, *sink_pad; - - g_print ("DEBUG: you pressed parse.\n"); - ui_feedback_clear (fd->ui); - ui_feedback_add (fd->ui, "Parsing pipeline ...\n"); - if (fd->input_pipe) - g_free (fd->input_pipe); - if (fd->output_pipe) - g_free (fd->output_pipe); - if (fd->filter_element) - g_free (fd->filter_element); - fd->input_pipe = g_strdup_printf ("bin.( %s )", - gtk_entry_get_text (GTK_ENTRY (fd->ui->input))); - fd->output_pipe = g_strdup_printf ("bin.( %s )", - gtk_entry_get_text (GTK_ENTRY (fd->ui->output))); - /* gtkcombo.h says I can access the entry field directly */ - fd->filter_element = - g_strdup (gtk_entry_get_text (GTK_ENTRY (filter->entry))); - g_print ("Input pipeline :\t%s (%d)\n", fd->input_pipe, - (int) strlen (fd->input_pipe)); - g_print ("Filter element :\t%s (%d)\n", fd->filter_element, - (int) strlen (fd->filter_element)); - g_print ("Output pipeline :\t%s (%d)\n", fd->output_pipe, - (int) strlen (fd->output_pipe)); - - /* try to create in and out bins */ - if (strlen (fd->input_pipe) == 0) { - ui_feedback_add (fd->ui, "Error : try setting an input pipe.\n"); - return; - } - if (fd->input) - gst_object_unref (GST_OBJECT (fd->input)); - fd->input = GST_ELEMENT (gst_parse_launch (fd->input_pipe, &error)); - if (error) { - ui_feedback_add (fd->ui, "Error : parsing input pipeline : %s\n", - error->message); - g_error_free (error); - return; - } - - if (strlen (fd->output_pipe) == 0) { - ui_feedback_add (fd->ui, "Error : try setting an output pipe.\n"); - return; - } - if (fd->output) - gst_object_unref (GST_OBJECT (fd->output)); - fd->output = GST_ELEMENT (gst_parse_launch (fd->output_pipe, &error)); - if (error) { - ui_feedback_add (fd->ui, "Error : parsing output pipeline : %s\n", - error->message); - g_error_free (error); - return; - } - - /* try to create filter */ - if (fd->filter) - gst_object_unref (GST_OBJECT (fd->filter)); - fd->filter = gst_element_factory_make (fd->filter_element, "filter"); - if (fd->filter == NULL) { - ui_feedback_add (fd->ui, "Error : could not create element %s\n", - fd->filter_element); - return; - } - - /* set up dynparam controls for filter */ - ui_control_create (fd->filter, fd->ui->control, fd->ui); - - /* create toplevel bin */ - fd->pipeline = gst_thread_new ("toplevel"); - - /* add the players to it */ - gst_bin_add_many (GST_BIN (fd->pipeline), - fd->input, fd->filter, fd->output, NULL); - - /* connect filter to input and output bin */ - src_pad = gst_bin_find_unconnected_pad (GST_BIN (fd->input), GST_PAD_SRC, - "source"); - if (src_pad == NULL) { - ui_feedback_add (fd->ui, - "Error : could not find an unconnected source pad !\n"); - return; - } - sink_pad = gst_bin_find_unconnected_pad (GST_BIN (fd->output), GST_PAD_SINK, - "sink"); - if (sink_pad == NULL) { - ui_feedback_add (fd->ui, - "Error : could not find an unconnected sink pad !\n"); - return; - } - gst_element_add_pad (fd->input, src_pad); - gst_element_add_pad (fd->output, sink_pad); - - gst_element_link_many (fd->input, fd->filter, fd->output, NULL); - - if (fd->pipe_string) - g_free (fd->pipe_string); - fd->pipe_string = g_strdup_printf ("%s ! %s ! %s", fd->input_pipe, - fd->filter_element, fd->output_pipe); - g_print ("Pipeline : %s\n", fd->pipe_string); - ui_feedback_add (fd->ui, "Complete parsed pipeline: %s\n", fd->pipe_string); - - -} - -/* find out the list of choices for GStreamer filters */ -GList * -get_filter_choices (void) -{ - GList *choices = NULL; - - choices = g_list_append (choices, "volume"); - choices = g_list_append (choices, "ladspa_lpf"); - choices = g_list_append (choices, "ladspa_hpf"); - - return choices; -} - -void -init_data (_filter_data_t * fd) -{ - fd->input_pipe = NULL; - fd->output_pipe = NULL; - fd->filter_element = NULL; - fd->pipe_string = NULL; - fd->filter_choices = get_filter_choices (); - - /* GStreamer stuff */ - fd->input = NULL; - fd->output = NULL; - fd->filter = NULL; - fd->pipeline = NULL; - fd->playing = FALSE; -} - -void -create_ui (_filter_ui_t * fui, _filter_data_t * fd) -{ - GtkWidget *widget; /* temporary widget */ - GtkWidget *vbox; /* temporary vbox */ - - g_print ("DEBUG: creating top-level window\n"); - fui->window = gtk_window_new (GTK_WINDOW_TOPLEVEL); - widget = gtk_vbox_new (FALSE, 0); - gtk_container_add (GTK_CONTAINER (fui->window), widget); - gtk_window_set_title (GTK_WINDOW (fui->window), "Gee, I can set titles too"); - - /* top level window division */ - g_print ("DEBUG: creating top-level window contents\n"); - fui->buttons = gtk_hbox_new (FALSE, 0); - gtk_container_add (GTK_CONTAINER (widget), fui->buttons); - fui->feedback = gtk_text_view_new (); - gtk_container_add (GTK_CONTAINER (widget), fui->feedback); - fui->selection = gtk_hbox_new (FALSE, 0); - gtk_container_add (GTK_CONTAINER (widget), fui->selection); - fui->control = gtk_vbox_new (TRUE, 5); - gtk_container_add (GTK_CONTAINER (widget), fui->control); - - /* button widget */ - fui->parse = gtk_button_new_with_label ("Parse"); - gtk_container_add (GTK_CONTAINER (fui->buttons), fui->parse); - g_signal_connect (G_OBJECT (fui->parse), "clicked", - G_CALLBACK (cb_parse_clicked), fd); - fui->play = gtk_button_new_with_label ("Play"); - gtk_container_add (GTK_CONTAINER (fui->buttons), fui->play); - g_signal_connect (G_OBJECT (fui->play), "clicked", - G_CALLBACK (cb_play_clicked), fd); - fui->stop = gtk_button_new_with_label ("Stop"); - gtk_container_add (GTK_CONTAINER (fui->buttons), fui->stop); - g_signal_connect (G_OBJECT (fui->stop), "clicked", - G_CALLBACK (cb_stop_clicked), fd); - - /* feedback widget */ - fui->fb_buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (fui->feedback)); - gtk_text_buffer_set_text (fui->fb_buffer, - "Hello, and welcome to the GStreamer filter demo app !\n" - "I'll be your feedback window for today.\n", -1); - - /* selection widget */ - vbox = gtk_vbox_new (FALSE, 0); - widget = gtk_label_new ("Input Pipe"); - gtk_container_add (GTK_CONTAINER (vbox), widget); - fui->input = gtk_entry_new (); - gtk_entry_set_text (GTK_ENTRY (fui->input), "sinesrc"); - gtk_container_add (GTK_CONTAINER (vbox), fui->input); - gtk_container_add (GTK_CONTAINER (fui->selection), vbox); - g_signal_connect (G_OBJECT (fui->input), "activate", - G_CALLBACK (cb_entry_activate), NULL); - - vbox = gtk_vbox_new (FALSE, 0); - widget = gtk_label_new ("Filter"); - gtk_container_add (GTK_CONTAINER (vbox), widget); - fui->filter = gtk_combo_new (); - gtk_combo_set_popdown_strings (GTK_COMBO (fui->filter), fd->filter_choices); - gtk_container_add (GTK_CONTAINER (vbox), fui->filter); - gtk_container_add (GTK_CONTAINER (fui->selection), vbox); - - vbox = gtk_vbox_new (FALSE, 0); - widget = gtk_label_new ("Output Pipe"); - gtk_container_add (GTK_CONTAINER (vbox), widget); - fui->output = gtk_entry_new (); - gtk_entry_set_text (GTK_ENTRY (fui->output), DEFAULT_AUDIOSINK); - gtk_container_add (GTK_CONTAINER (vbox), fui->output); - gtk_container_add (GTK_CONTAINER (fui->selection), vbox); - g_signal_connect (G_OBJECT (fui->output), "activate", - G_CALLBACK (cb_entry_activate), NULL); - - /* control widget is dynamically generated */ - /* - g_print ("DEBUG: labeling control area.\n"); - widget = gtk_label_new ("This is the big control area."); - gtk_container_add (GTK_CONTAINER (fui->control), widget); - */ -} - - -int -main (int argc, char *argv[]) -{ - _filter_data_t filter_data; - _filter_ui_t filter_ui; - - - gtk_init (&argc, &argv); - gst_init (&argc, &argv); - gst_control_init (&argc, &argv); - - init_data (&filter_data); - filter_data.ui = &filter_ui; - - create_ui (&filter_ui, &filter_data); - gtk_widget_show_all (filter_ui.window); - - gtk_main (); - - return 0; -} |