gstreamer/gst/elements/gstidentity.c

/* Gnome-Streamer
 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */


#include <gstidentity.h>


GstElementDetails gst_identity_details = {
  "Identity",
  "Filter",
  "Pass data without modification",
  VERSION,
  "Erik Walthinsen <omega@cse.ogi.edu>",
  "(C) 1999",
};


/* Identity signals and args */
enum {
  /* FILL ME */
  LAST_SIGNAL
};

enum {
  ARG_0,
  ARG_CONTROL
};


static void gst_identity_class_init(GstIdentityClass *klass);
static void gst_identity_init(GstIdentity *identity);
static void gst_identity_set_arg(GtkObject *object,GtkArg *arg,guint id);
static void gst_identity_get_arg(GtkObject *object,GtkArg *arg,guint id);


static GstFilterClass *parent_class = NULL;
static guint gst_identity_signals[LAST_SIGNAL] = { 0 };

GtkType
gst_identity_get_type(void) {
  static GtkType identity_type = 0;

  if (!identity_type) {
    static const GtkTypeInfo identity_info = {
      "GstIdentity",
      sizeof(GstIdentity),
      sizeof(GstIdentityClass),
      (GtkClassInitFunc)gst_identity_class_init,
      (GtkObjectInitFunc)gst_identity_init,
      (GtkArgSetFunc)gst_identity_set_arg,
      (GtkArgGetFunc)gst_identity_get_arg,
      (GtkClassInitFunc)NULL,
    };
    identity_type = gtk_type_unique(GST_TYPE_FILTER,&identity_info);
  }
  return identity_type;
}

static void gst_identity_class_init(GstIdentityClass *klass) {
  GtkObjectClass *gtkobject_class;
  GstFilterClass *gstfilter_class;

  gtkobject_class = (GtkObjectClass*)klass;
  gstfilter_class = (GstFilterClass*)klass;

  parent_class = gtk_type_class(GST_TYPE_FILTER);

  gtk_object_add_arg_type("GstIdentity::control", GTK_TYPE_INT,
                          GTK_ARG_READWRITE, ARG_CONTROL);

  gtkobject_class->set_arg = gst_identity_set_arg;  
  gtkobject_class->get_arg = gst_identity_get_arg;
}

static void gst_identity_init(GstIdentity *identity) {
  identity->sinkpad = gst_pad_new("sink",GST_PAD_SINK);
  gst_element_add_pad(GST_ELEMENT(identity),identity->sinkpad);
  gst_pad_set_chain_function(identity->sinkpad,gst_identity_chain);
  identity->srcpad = gst_pad_new("src",GST_PAD_SRC);
  gst_element_add_pad(GST_ELEMENT(identity),identity->srcpad);

  identity->control = 0;
}

GstElement *gst_identity_new(gchar *name) {
  GstElement *identity = GST_ELEMENT(gtk_type_new(GST_TYPE_IDENTITY));
  gst_element_set_name(GST_ELEMENT(identity),name);
  return identity;
}

void gst_identity_chain(GstPad *pad,GstBuffer *buf) {
  GstIdentity *identity;

  g_return_if_fail(pad != NULL);
  g_return_if_fail(GST_IS_PAD(pad));
  g_return_if_fail(buf != NULL);

  identity = GST_IDENTITY(pad->parent);
//  g_print("gst_identity_chain: got buffer in '%s'\n",
//          gst_element_get_name(GST_ELEMENT(identity)));
  g_print("i");
  gst_pad_push(identity->srcpad,buf);
}

static void gst_identity_set_arg(GtkObject *object,GtkArg *arg,guint id) {
  GstIdentity *identity;

  /* it's not null if we got it, but it might not be ours */
  g_return_if_fail(GST_IS_IDENTITY(object));
  identity = GST_IDENTITY(object);

  switch(id) {
    case ARG_CONTROL:
      identity->control = GTK_VALUE_INT(*arg);
      break;
    default:
      break;
  }
}

static void gst_identity_get_arg(GtkObject *object,GtkArg *arg,guint id) {
  GstIdentity *identity;

  /* it's not null if we got it, but it might not be ours */
  g_return_if_fail(GST_IS_IDENTITY(object));
  identity = GST_IDENTITY(object);

  switch (id) {
    case ARG_CONTROL:
      GTK_VALUE_INT(*arg) = identity->control;
      break;
    default:
      arg->type = GTK_TYPE_INVALID;
      break;
  }
}