gstreamer/ext/arts/gst_arts.c

/* GStreamer
 * 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.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include <math.h>
#include <sys/soundcard.h>

/*#define DEBUG_ENABLED */
#include "gst_arts.h"
#include "gst_artsio_impl.h"

/* elementfactory information */
static GstElementDetails gst_arts_details = {
  "aRts plugin",
  "Filter/Audio",
  "aRts wrapper filter",
  "Erik Walthinsen <omega@temple-baptist.com,\n"
  "Stefan Westerfeld <stefan@space.twc.de>",
};


static GstStaticPadTemplate sink_temp =
GST_STATIC_PAD_TEMPLATE (
  "sink",
  GST_PAD_SINK,
  GST_PAD_ALWAYS,
  GST_STATIC_CAPS ( "audio/x-raw-int, "
    "depth = (int) 16, "
    "width = (int) 16, "
    "signed = (boolean) true, "
    "channels = (int) 2, "
    "endianness = (int) byte_order"
  )
);

static GstStaticPadTemplate src_temp =
GST_STATIC_PAD_TEMPLATE (
  "src",
  GST_PAD_SRC,
  GST_PAD_ALWAYS,
  GST_STATIC_CAPS ("audio/x-raw-int, "
    "depth = (int) 16, "
    "width = (int) 16, "
    "signed = (boolean) true, "
    "channels = (int) 2, "
    "rate = (int) 44100, "
    "endianness = (int) byte_order"
  )
);

enum {
  ARG_0,
  ARG_LAST,
};

static void			gst_arts_base_init		(gpointer g_class);
static void			gst_arts_class_init		(GstARTSClass *klass);
static void			gst_arts_init			(GstARTS *arts);

static void			gst_arts_loop			(GstElement *element);


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

GType
gst_arts_get_type (void)
{
  static GType gst_arts_type = 0;

  if (!gst_arts_type) {
    static const GTypeInfo gst_arts_info = {
      sizeof(GstARTSClass),      
      gst_arts_base_init,
      NULL,
      (GClassInitFunc)gst_arts_class_init,
      NULL,
      NULL,
      sizeof(GstARTS),
      0,
      (GInstanceInitFunc)gst_arts_init,
    };
    gst_arts_type = g_type_register_static(GST_TYPE_ELEMENT, "GstArts", &gst_arts_info, 0);
  }
  return gst_arts_type;
} 

static void
gst_arts_base_init (gpointer g_class)
{
  GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
  
  gst_element_class_add_pad_template (element_class,
      gst_static_pad_template_get (&sink_temp));
  gst_element_class_add_pad_template (element_class,
      gst_static_pad_template_get (&src_temp));
  gst_element_class_set_details (element_class, &gst_arts_details);
}

static void
gst_arts_class_init (GstARTSClass *klass)
{
  GObjectClass *gobject_class;
  GstElementClass *gstelement_class;

  parent_class = g_type_class_ref(GST_TYPE_ELEMENT);

  gobject_class = (GObjectClass*)klass;
  gstelement_class = (GstElementClass*)klass;
}

static void
gst_arts_init (GstARTS *arts)
{
  arts->sinkpad = gst_pad_new_from_template(
      gst_element_get_pad_template (GST_ELEMENT (arts), "sink"), "sink");
  gst_element_add_pad(GST_ELEMENT(arts),arts->sinkpad);

  arts->srcpad = gst_pad_new_from_template(
      gst_element_get_pad_template (GST_ELEMENT (arts), "src"), "src");
  gst_element_add_pad(GST_ELEMENT(arts),arts->srcpad);

  gst_element_set_loop_function (GST_ELEMENT (arts), gst_arts_loop);

  arts->wrapper = gst_arts_wrapper_new(arts->sinkpad,arts->srcpad);
}

static void
gst_arts_loop	(GstElement *element)
{
  GstARTS *arts = (GstARTS*)element;

  g_return_if_fail (arts != NULL);

  gst_arts_wrapper_do(arts->wrapper);
}

static gboolean
plugin_init (GstPlugin *plugin)
{
  if (!gst_element_register (plugin, "gstarts", GST_RANK_NONE, GST_TYPE_ARTS))
    return FALSE;

  return TRUE;
}

GST_PLUGIN_DEFINE (
  GST_VERSION_MAJOR,
  GST_VERSION_MINOR,
  "gst_arts",
  "arTs filter wrapper",
  plugin_init,
  VERSION,
  "LGPL",
  GST_PACKAGE,
  GST_ORIGIN
)