mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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delete obsolete example
Original commit message from CVS: delete obsolete example
This commit is contained in:
Stefan Kost
parent
79106e14f5
commit
75b8ebd604
3 changed files with 0 additions and 530 deletions
1
examples/dynparams/.gitignore
vendored
1
examples/dynparams/.gitignore
vendored
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@ -1 +0,0 @@
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filter
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@ -1,7 +0,0 @@
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examples = filter
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noinst_PROGRAMS = $(examples)
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# we have nothing but apps here, we can do this safely
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LIBS = $(GST_LIBS) $(GTK_LIBS) $(GST_CONTROL_LIBS)
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AM_CFLAGS = $(GST_CFLAGS) $(GTK_CFLAGS)
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@ -1,522 +0,0 @@
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/*
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* filter.c
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*
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* demo application for filters using dparams
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* dparams get their sliders which you can play with
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*
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* you can also enter an input and output part of a pipeline
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <string.h>
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#include <gtk/gtk.h>
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#include <gst/gst.h>
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#include <gst/control/control.h>
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/* filter UI data */
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struct _filter_ui
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{
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GtkWidget *window; /* top-level interface window */
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GtkWidget *buttons; /* all of the control buttons */
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GtkWidget *parse, *play, *stop; /* control buttons */
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GtkWidget *feedback; /* here's where we'll tell you stuff */
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GtkTextBuffer *fb_buffer; /* feedback buffer */
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GtkWidget *selection; /* the place to input element stuff */
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GtkWidget *input, *filter, *output; /* the selection widgets */
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GtkWidget *control; /* the dynamically generated control UI */
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};
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typedef struct _filter_ui _filter_ui_t;
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/* back-end data */
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struct _filter_data
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{
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_filter_ui_t *ui; /* the UI data */
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gchar *input_pipe, *output_pipe, *filter_element;
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gchar *pipe_string;
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GList *filter_choices;
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gboolean playing;
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GstElement *input, *output; /* these are in and out bins */
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GstElement *pipeline;
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GstElement *filter;
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};
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typedef struct _filter_data _filter_data_t;
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/* internal prototypes when they can't be avoided */
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void cb_remove_and_destroy (GtkWidget * widget, gpointer user_data);
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//void cb_dynparm_value_changed (GtkWidget *widget, gpointer user_data);
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void cb_dynparm_value_changed (GtkRange * range, GstDParam * dparam);
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/* GStreamer helper functions go here */
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/* go through a bin, finding the one pad that is unconnected in the given
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* direction, and return a ghost pad */
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GstPad *
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gst_bin_find_unconnected_pad (GstBin * bin, GstPadDirection direction,
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gchar * name)
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{
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GstPad *pad = NULL;
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GList *elements = NULL;
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const GList *pads = NULL;
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GstElement *element = NULL;
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g_print ("DEBUG: find_unconnected start\n");
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elements = (GList *) gst_bin_get_list (bin);
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/* traverse all elements looking for unconnected pads */
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while (elements && pad == NULL) {
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element = GST_ELEMENT (elements->data);
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g_print ("DEBUG: looking in element %s\n", gst_element_get_name (element));
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pads = gst_element_get_pad_list (element);
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while (pads) {
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/* check if the direction matches */
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if (GST_PAD_DIRECTION (GST_PAD (pads->data)) == direction) {
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if (GST_PAD_PEER (GST_PAD (pads->data)) == NULL) {
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/* found it ! */
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g_print ("DEBUG: found an unconnected pad !\n");
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pad = GST_PAD (pads->data);
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}
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}
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if (pad)
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break; /* found one already */
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pads = g_list_next (pads);
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}
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elements = g_list_next (elements);
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}
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g_print ("DEBUG: find_unconnected stop\n");
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if (pad == NULL) /* we didn't find it at all */
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return NULL;
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pad = gst_ghost_pad_new (name, pad);
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return pad;
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}
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void
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ui_feedback_add_text (_filter_ui_t * ui, const gchar * text)
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{
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GtkTextIter iter;
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gtk_text_buffer_get_end_iter (ui->fb_buffer, &iter);
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gtk_text_buffer_insert (ui->fb_buffer, &iter, text, -1);
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}
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void
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ui_feedback_add (_filter_ui_t * ui, const gchar * format, ...)
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{
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va_list args;
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gchar *buffer = NULL;
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va_start (args, format);
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buffer = g_strdup_vprintf (format, args);
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va_end (args);
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ui_feedback_add_text (ui, buffer);
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g_free (buffer);
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}
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void
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ui_feedback_clear (_filter_ui_t * ui)
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{
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gtk_text_buffer_set_text (ui->fb_buffer, "", 0);
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}
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/* create the control widget using the element's dynparams
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* control is a vbox which we need to empty first */
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void
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ui_control_create (GstElement * element, GtkWidget * control, _filter_ui_t * ui)
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{
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GtkWidget *hbox = NULL;
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GtkWidget *widget = NULL;
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GstDParamManager *dpman = NULL;
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GstDParam *dparam = NULL;
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GParamSpec **specs = NULL;
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int i = 0;
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g_assert (GTK_IS_VBOX (control));
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/* empty control vbox */
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g_print ("DEBUG: emptying control widget\n");
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gtk_container_foreach (GTK_CONTAINER (control), cb_remove_and_destroy,
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(gpointer) control);
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g_print ("DEBUG: adding label to control widget\n");
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widget = gtk_label_new ("Dynamic Parameters");
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gtk_container_add (GTK_CONTAINER (control), widget);
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gtk_widget_show (widget);
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if ((dpman = gst_dpman_get_manager (element))) {
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ui_feedback_add (ui, "Found Dynamic Parameters on filter element.\n");
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specs = gst_dpman_list_dparam_specs (dpman);
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for (i = 0; specs[i] != NULL; ++i) {
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hbox = gtk_hbox_new (FALSE, 0);
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widget = gtk_label_new (g_param_spec_get_name (specs[i]));
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gtk_container_add (GTK_CONTAINER (hbox), widget);
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gtk_widget_show (widget);
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switch (G_PARAM_SPEC_VALUE_TYPE (specs[i])) {
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case G_TYPE_INT64:
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widget = gtk_hscale_new_with_range (
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(gdouble) (((GParamSpecInt64 *) specs[i])->minimum),
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(gdouble) (((GParamSpecInt64 *) specs[i])->maximum), 1.0);
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gtk_range_set_value (GTK_RANGE (widget),
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(gdouble) ((GParamSpecInt64 *) specs[i])->default_value);
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break;
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case G_TYPE_INT:
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widget = gtk_hscale_new_with_range (
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(gdouble) (((GParamSpecInt *) specs[i])->minimum),
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(gdouble) (((GParamSpecInt *) specs[i])->maximum), 1.0);
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gtk_range_set_value (GTK_RANGE (widget),
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(gdouble) ((GParamSpecInt *) specs[i])->default_value);
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break;
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case G_TYPE_FLOAT:
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widget = gtk_hscale_new_with_range (
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(gdouble) (((GParamSpecFloat *) specs[i])->minimum),
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(gdouble) (((GParamSpecFloat *) specs[i])->maximum), 0.00001);
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gtk_range_set_value (GTK_RANGE (widget),
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(gdouble) ((GParamSpecFloat *) specs[i])->default_value);
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break;
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}
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/* create the dparam object */
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dparam = gst_dpsmooth_new (G_PARAM_SPEC_VALUE_TYPE (specs[i]));
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g_object_set (G_OBJECT (dparam), "update_period", 2000000LL, NULL);
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if (!gst_dpman_attach_dparam (dpman,
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(gchar *) g_param_spec_get_name (specs[i]), dparam))
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g_assert_not_reached ();
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gst_dpman_set_mode (dpman, "asynchronous");
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g_signal_connect (widget, "value-changed",
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G_CALLBACK (cb_dynparm_value_changed), dparam);
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cb_dynparm_value_changed (GTK_RANGE (widget), dparam);
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gtk_container_add (GTK_CONTAINER (hbox), widget);
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gtk_widget_show (widget);
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}
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gtk_container_add (GTK_CONTAINER (control), hbox);
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gtk_widget_show (hbox);
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}
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}
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/* all the pretty callbacks gather here please */
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void
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cb_remove_and_destroy (GtkWidget * widget, gpointer user_data)
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{
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GtkContainer *container = GTK_CONTAINER (user_data);
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g_print ("DEBUG: trying to remove widget from a container.\n");
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gtk_container_remove (container, widget);
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gtk_widget_destroy (widget);
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}
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/* when the scale associated with a dparam changes, respond */
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void
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cb_dynparm_value_changed (GtkRange * range, GstDParam * dparam)
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{
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/*
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GstDParam *dparam = GST_DPARAM (user_data);
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GtkHScale *adj = GTK_HSCALE (widget);
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*/
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gdouble value = 0.0;
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g_assert (GST_IS_DPARAM (dparam));
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g_assert (GTK_IS_RANGE (range));
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value = gtk_range_get_value (range);
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g_print ("DEBUG: setting value to %f\n", value);
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switch (G_PARAM_SPEC_VALUE_TYPE (GST_DPARAM_PARAM_SPEC (dparam))) {
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case G_TYPE_INT64:
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g_object_set (G_OBJECT (dparam), "value_int64", (gint64) value, NULL);
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break;
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case G_TYPE_INT:
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g_object_set (G_OBJECT (dparam), "value_int", (gint) value, NULL);
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break;
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case G_TYPE_FLOAT:
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g_object_set (G_OBJECT (dparam), "value_float", (gfloat) value, NULL);
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break;
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}
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}
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void
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cb_entry_activate (GtkEntry * entry, gpointer user_data)
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{
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g_print ("DEBUG: oi ! you activated an entry !\n");
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g_print ("DEBUG: pipeline: %s\n", gtk_entry_get_text (entry));
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}
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void
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cb_play_clicked (GtkButton * button, gpointer * user_data)
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{
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_filter_data_t *fd = (_filter_data_t *) user_data;
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g_return_if_fail (GST_IS_PIPELINE (fd->pipeline));
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if (GST_STATE (fd->pipeline) == GST_STATE_PLAYING) {
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ui_feedback_add (fd->ui, "Pipeline is already playing !\n");
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return;
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}
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gst_element_set_state (fd->pipeline, GST_STATE_PLAYING);
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}
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void
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cb_stop_clicked (GtkButton * button, gpointer * user_data)
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{
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_filter_data_t *fd = (_filter_data_t *) user_data;
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if (GST_STATE (fd->pipeline) != GST_STATE_PLAYING) {
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ui_feedback_add (fd->ui, "Pipeline is not playing !\n");
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return;
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}
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gst_element_set_state (fd->pipeline, GST_STATE_NULL);
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}
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void
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cb_parse_clicked (GtkButton * button, gpointer * user_data)
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{
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_filter_data_t *fd = (_filter_data_t *) user_data;
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GtkCombo *filter = GTK_COMBO (fd->ui->filter);
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GError *error = NULL;
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GstPad *src_pad, *sink_pad;
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g_print ("DEBUG: you pressed parse.\n");
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ui_feedback_clear (fd->ui);
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ui_feedback_add (fd->ui, "Parsing pipeline ...\n");
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if (fd->input_pipe)
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g_free (fd->input_pipe);
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if (fd->output_pipe)
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g_free (fd->output_pipe);
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if (fd->filter_element)
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g_free (fd->filter_element);
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fd->input_pipe = g_strdup_printf ("bin.( %s )",
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gtk_entry_get_text (GTK_ENTRY (fd->ui->input)));
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fd->output_pipe = g_strdup_printf ("bin.( %s )",
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gtk_entry_get_text (GTK_ENTRY (fd->ui->output)));
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/* gtkcombo.h says I can access the entry field directly */
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fd->filter_element =
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g_strdup (gtk_entry_get_text (GTK_ENTRY (filter->entry)));
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g_print ("Input pipeline :\t%s (%d)\n", fd->input_pipe,
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(int) strlen (fd->input_pipe));
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g_print ("Filter element :\t%s (%d)\n", fd->filter_element,
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(int) strlen (fd->filter_element));
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g_print ("Output pipeline :\t%s (%d)\n", fd->output_pipe,
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(int) strlen (fd->output_pipe));
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/* try to create in and out bins */
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if (strlen (fd->input_pipe) == 0) {
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ui_feedback_add (fd->ui, "Error : try setting an input pipe.\n");
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return;
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}
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if (fd->input)
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gst_object_unref (GST_OBJECT (fd->input));
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fd->input = GST_ELEMENT (gst_parse_launch (fd->input_pipe, &error));
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if (error) {
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ui_feedback_add (fd->ui, "Error : parsing input pipeline : %s\n",
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error->message);
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g_error_free (error);
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return;
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}
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if (strlen (fd->output_pipe) == 0) {
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ui_feedback_add (fd->ui, "Error : try setting an output pipe.\n");
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return;
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}
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if (fd->output)
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gst_object_unref (GST_OBJECT (fd->output));
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fd->output = GST_ELEMENT (gst_parse_launch (fd->output_pipe, &error));
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if (error) {
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ui_feedback_add (fd->ui, "Error : parsing output pipeline : %s\n",
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error->message);
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g_error_free (error);
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return;
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}
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/* try to create filter */
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if (fd->filter)
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gst_object_unref (GST_OBJECT (fd->filter));
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fd->filter = gst_element_factory_make (fd->filter_element, "filter");
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if (fd->filter == NULL) {
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ui_feedback_add (fd->ui, "Error : could not create element %s\n",
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fd->filter_element);
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return;
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}
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/* set up dynparam controls for filter */
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ui_control_create (fd->filter, fd->ui->control, fd->ui);
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/* create toplevel bin */
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fd->pipeline = gst_thread_new ("toplevel");
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/* add the players to it */
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gst_bin_add_many (GST_BIN (fd->pipeline),
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fd->input, fd->filter, fd->output, NULL);
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/* connect filter to input and output bin */
|
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src_pad = gst_bin_find_unconnected_pad (GST_BIN (fd->input), GST_PAD_SRC,
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"source");
|
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if (src_pad == NULL) {
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ui_feedback_add (fd->ui,
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"Error : could not find an unconnected source pad !\n");
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return;
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}
|
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sink_pad = gst_bin_find_unconnected_pad (GST_BIN (fd->output), GST_PAD_SINK,
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"sink");
|
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if (sink_pad == NULL) {
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ui_feedback_add (fd->ui,
|
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"Error : could not find an unconnected sink pad !\n");
|
||||
return;
|
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}
|
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gst_element_add_pad (fd->input, src_pad);
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gst_element_add_pad (fd->output, sink_pad);
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|
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gst_element_link_many (fd->input, fd->filter, fd->output, NULL);
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|
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if (fd->pipe_string)
|
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g_free (fd->pipe_string);
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fd->pipe_string = g_strdup_printf ("%s ! %s ! %s", fd->input_pipe,
|
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fd->filter_element, fd->output_pipe);
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g_print ("Pipeline : %s\n", fd->pipe_string);
|
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ui_feedback_add (fd->ui, "Complete parsed pipeline: %s\n", fd->pipe_string);
|
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|
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|
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}
|
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|
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/* find out the list of choices for GStreamer filters */
|
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GList *
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get_filter_choices (void)
|
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{
|
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GList *choices = NULL;
|
||||
|
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choices = g_list_append (choices, "volume");
|
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choices = g_list_append (choices, "ladspa_lpf");
|
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choices = g_list_append (choices, "ladspa_hpf");
|
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|
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return choices;
|
||||
}
|
||||
|
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void
|
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init_data (_filter_data_t * fd)
|
||||
{
|
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fd->input_pipe = NULL;
|
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fd->output_pipe = NULL;
|
||||
fd->filter_element = NULL;
|
||||
fd->pipe_string = NULL;
|
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fd->filter_choices = get_filter_choices ();
|
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|
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/* GStreamer stuff */
|
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fd->input = NULL;
|
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fd->output = NULL;
|
||||
fd->filter = NULL;
|
||||
fd->pipeline = NULL;
|
||||
fd->playing = FALSE;
|
||||
}
|
||||
|
||||
void
|
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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);
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||||
gtk_window_set_title (GTK_WINDOW (fui->window), "Gee, I can set titles too");
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||||
|
||||
/* 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;
|
||||
}
|
||||
Loading…
Reference in a new issue