+++ /dev/null
-/*
- * 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;
-}
projects / platform / upstream / gstreamer.git / commitdiff