gstreamer/gst/elements/gstfdsink.c

/* GStreamer
 * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
 *                    2000 Wim Taymans <wtay@chello.be>
 *
 * gstfdsink.c: 
 *
 * 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 <gstfdsink.h>
#include <unistd.h>


GstElementDetails gst_fdsink_details = {
  "Filedescriptor Sink",
  "Sink",
  "Write data to a file descriptor",
  VERSION,
  "Erik Walthinsen <omega@cse.ogi.edu>",
  "(C) 1999",
};


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

enum {
  ARG_0,
  ARG_FD
};


static void gst_fdsink_class_init	(GstFdSinkClass *klass);
static void gst_fdsink_init		(GstFdSink *fdsink);

static void gst_fdsink_set_arg		(GtkObject *object, GtkArg *arg, guint id);
static void gst_fdsink_get_arg		(GtkObject *object, GtkArg *arg, guint id);

static void gst_fdsink_chain		(GstPad *pad,GstBuffer *buf);

static GstElementClass *parent_class = NULL;
//static guint gst_fdsink_signals[LAST_SIGNAL] = { 0 };

GtkType
gst_fdsink_get_type (void) 
{
  static GtkType fdsink_type = 0;

  if (!fdsink_type) {
    static const GtkTypeInfo fdsink_info = {
      "GstFdSink",
      sizeof(GstFdSink),
      sizeof(GstFdSinkClass),
      (GtkClassInitFunc)gst_fdsink_class_init,
      (GtkObjectInitFunc)gst_fdsink_init,
      (GtkArgSetFunc)gst_fdsink_set_arg,
      (GtkArgGetFunc)gst_fdsink_get_arg,
      (GtkClassInitFunc)NULL,
    };
    fdsink_type = gtk_type_unique (GST_TYPE_ELEMENT, &fdsink_info);
  }
  return fdsink_type;
}

static void
gst_fdsink_class_init (GstFdSinkClass *klass) 
{
  GtkObjectClass *gtkobject_class;

  gtkobject_class = (GtkObjectClass*)klass;

  parent_class = gtk_type_class (GST_TYPE_ELEMENT);

  gtk_object_add_arg_type ("GstFdSink::fd", GTK_TYPE_INT,
                           GTK_ARG_READWRITE, ARG_FD);

  gtkobject_class->set_arg = gst_fdsink_set_arg;
  gtkobject_class->get_arg = gst_fdsink_get_arg;
}

static void 
gst_fdsink_init (GstFdSink *fdsink) 
{
  fdsink->sinkpad = gst_pad_new ("sink", GST_PAD_SINK);
  gst_element_add_pad (GST_ELEMENT (fdsink), fdsink->sinkpad);
  gst_pad_set_chain_function (fdsink->sinkpad, gst_fdsink_chain);

  fdsink->fd = 1;
}

static void 
gst_fdsink_chain (GstPad *pad, GstBuffer *buf) 
{
  GstFdSink *fdsink;

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

  fdsink = GST_FDSINK (gst_pad_get_parent (pad));
  
  g_return_if_fail (fdsink->fd >= 0);
  
  if (GST_BUFFER_DATA (buf)) {
    GST_DEBUG (0,"writing %d bytes to file descriptor %d\n",GST_BUFFER_SIZE (buf), fdsink->fd);
    write (fdsink->fd, GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf));
  }
  
  gst_buffer_unref (buf);
}

static void 
gst_fdsink_set_arg (GtkObject *object, GtkArg *arg, guint id) 
{
  GstFdSink *fdsink;
   
  /* it's not null if we got it, but it might not be ours */
  g_return_if_fail (GST_IS_FDSINK (object));
  
  fdsink = GST_FDSINK (object);

  switch(id) {
    case ARG_FD:
      fdsink->fd = GTK_VALUE_INT (*arg);
      break;
    default:
      break;
  }
}

static void 
gst_fdsink_get_arg (GtkObject *object, GtkArg *arg, guint id) 
{
  GstFdSink *fdsink;
   
  /* it's not null if we got it, but it might not be ours */
  g_return_if_fail (GST_IS_FDSINK (object));
  
  fdsink = GST_FDSINK (object);

  switch(id) {
    case ARG_FD:
      GTK_VALUE_INT (*arg) = fdsink->fd;
      break;
    default:
      break;
  }
}