/*
* GStreamer
* Copyright (C) 2005 Thomas Vander Stichele <[email protected]>
* Copyright (C) 2005 Ronald S. Bultje <[email protected]>
* Copyright (C) 2009 Nicolau Leal Werneck <<[email protected]>>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Alternatively, the contents of this file may be used under the
* GNU Lesser General Public License Version 2.1 (the "LGPL"), in
* which case the following provisions apply instead of the ones
* mentioned above:
*
* 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.
*/

/**
* SECTION:element-nicvocoder
*
* FIXME:Describe nicvocoder here.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch -v -m fakesrc ! nicvocoder ! fakesink silent=TRUE
* ]|
* </refsect2>
*/

#ifdef HAVE_CONFIG_H
#  include <config.h>
#endif

#include <gst/gst.h>

#include "gstnicvocoder.h"

GST_DEBUG_CATEGORY_STATIC (gst_nic_vocoder_debug);
#define GST_CAT_DEFAULT gst_nic_vocoder_debug

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

enum
{
   PROP_0,
   PROP_SILENT
};

/* the capabilities of the inputs and outputs.
*
* describe the real formats here.
*/
static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
                                                                   GST_PAD_SINK,
                                                                   GST_PAD_ALWAYS,
                                                                   GST_STATIC_CAPS ("ANY")
   );

static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
                                                                  GST_PAD_SRC,
                                                                  GST_PAD_ALWAYS,
                                                                  GST_STATIC_CAPS ("ANY")
   );

GST_BOILERPLATE (GstNicVocoder, gst_nic_vocoder, GstElement,
                GST_TYPE_ELEMENT);

static void gst_nic_vocoder_set_property (GObject * object, guint prop_id,
                                         const GValue * value, GParamSpec * pspec);
static void gst_nic_vocoder_get_property (GObject * object, guint prop_id,
                                         GValue * value, GParamSpec * pspec);

static gboolean gst_nic_vocoder_set_caps (GstPad * pad, GstCaps * caps);
static GstFlowReturn gst_nic_vocoder_chain (GstPad * pad, GstBuffer * buf);

/* GObject vmethod implementations */

static void
gst_nic_vocoder_base_init (gpointer gclass)
{
   GstElementClass *element_class = GST_ELEMENT_CLASS (gclass);

   gst_element_class_set_details_simple(element_class,
                                        "NicVocoder",
                                        "FIXME:Generic",
                                        "FIXME:Generic Template Element",
                                        "Nicolau Leal Werneck <<[email protected]>>");

   gst_element_class_add_pad_template (element_class,
                                       gst_static_pad_template_get (&src_factory));
   gst_element_class_add_pad_template (element_class,
                                       gst_static_pad_template_get (&sink_factory));
}

/* initialize the nicvocoder's class */
static void
gst_nic_vocoder_class_init (GstNicVocoderClass * klass)
{
   GObjectClass *gobject_class;
   GstElementClass *gstelement_class;

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

   gobject_class->set_property = gst_nic_vocoder_set_property;
   gobject_class->get_property = gst_nic_vocoder_get_property;

   g_object_class_install_property (gobject_class, PROP_SILENT,
                                    g_param_spec_boolean ("silent", "Silent", "Produce verbose output ?",
                                                          FALSE, G_PARAM_READWRITE));
}

/* initialize the new element
* instantiate pads and add them to element
* set pad calback functions
* initialize instance structure
*/
static void
gst_nic_vocoder_init (GstNicVocoder * filter,
                     GstNicVocoderClass * gclass)
{
   filter->sinkpad = gst_pad_new_from_static_template (&sink_factory, "sink");
   gst_pad_set_setcaps_function (filter->sinkpad,
                                 GST_DEBUG_FUNCPTR(gst_nic_vocoder_set_caps));
   gst_pad_set_getcaps_function (filter->sinkpad,
                                 GST_DEBUG_FUNCPTR(gst_pad_proxy_getcaps));
   gst_pad_set_chain_function (filter->sinkpad,
                               GST_DEBUG_FUNCPTR(gst_nic_vocoder_chain));

   filter->srcpad = gst_pad_new_from_static_template (&src_factory, "src");
   gst_pad_set_getcaps_function (filter->srcpad,
                                 GST_DEBUG_FUNCPTR(gst_pad_proxy_getcaps));

   gst_element_add_pad (GST_ELEMENT (filter), filter->sinkpad);
   gst_element_add_pad (GST_ELEMENT (filter), filter->srcpad);
   filter->silent = FALSE;
}

static void
gst_nic_vocoder_set_property (GObject * object, guint prop_id,
                             const GValue * value, GParamSpec * pspec)
{
   GstNicVocoder *filter = GST_NICVOCODER (object);

   switch (prop_id) {
   case PROP_SILENT:
       filter->silent = g_value_get_boolean (value);
       break;
   default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
       break;
   }
}

static void
gst_nic_vocoder_get_property (GObject * object, guint prop_id,
                             GValue * value, GParamSpec * pspec)
{
   GstNicVocoder *filter = GST_NICVOCODER (object);

   switch (prop_id) {
   case PROP_SILENT:
       g_value_set_boolean (value, filter->silent);
       break;
   default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
       break;
   }
}

/* GstElement vmethod implementations */

/* this function handles the link with other elements */
static gboolean
gst_nic_vocoder_set_caps (GstPad * pad, GstCaps * caps)
{
   GstNicVocoder *filter;
   GstPad *otherpad;

   filter = GST_NICVOCODER (gst_pad_get_parent (pad));
   otherpad = (pad == filter->srcpad) ? filter->sinkpad : filter->srcpad;
   gst_object_unref (filter);

   return gst_pad_set_caps (otherpad, caps);
}

/* chain function
* this function does the actual processing
*/
static GstFlowReturn
gst_nic_vocoder_chain (GstPad * pad, GstBuffer * buf)
{
   GstNicVocoder *filter;

   guchar *data;
   gulong size;

   filter = GST_NICVOCODER (GST_OBJECT_PARENT (pad));

   data = GST_BUFFER_DATA (buf);
   size = GST_BUFFER_SIZE (buf);

   if (filter->silent == FALSE)
       g_print ("Have data of size %u samples\n", (unsigned int) size);


   long int x,y;
   static long int le=0, ld=0;


   int i=0;
   while(i<size) {
       //
       // Canal esquerdo
       x = (data[i+1]&128)?-1:0;

       ((char*)&x)[0] = data[i];((char*)&x)[1] = data[i+1];

       y=(x/3)+(le*2/3);
       le=y;

       data[i]  =((char*)&y)[0];data[i+1]=((char*)&y)[1];


       i+=2;

       //
       // Canal direito
       x = (data[i+1]&128)?-1:0;

       ((char*)&x)[0] = data[i];((char*)&x)[1] = data[i+1];

       y=(x/3)+(ld*2/3);
       ld=y;

       data[i]  =((char*)&y)[0];data[i+1]=((char*)&y)[1];

       i+=2;
   }


   /* just push out the incoming buffer without touching it */
   return gst_pad_push (filter->srcpad, buf);
}


/* entry point to initialize the plug-in
* initialize the plug-in itself
* register the element factories and other features
*/
static gboolean
nicvocoder_init (GstPlugin * nicvocoder)
{
   /* debug category for fltering log messages
    *
    * exchange the string 'Template nicvocoder' with your description
    */
   GST_DEBUG_CATEGORY_INIT (gst_nic_vocoder_debug, "nicvocoder",
                            0, "Template nicvocoder");

   return gst_element_register (nicvocoder, "nicvocoder", GST_RANK_NONE,
                                GST_TYPE_NICVOCODER);
}

/* gstreamer looks for this structure to register nicvocoders
*
* exchange the string 'Template nicvocoder' with your nicvocoder description
*/
GST_PLUGIN_DEFINE (
   GST_VERSION_MAJOR,
   GST_VERSION_MINOR,
   "nicvocoder",
   "Template nicvocoder",
   nicvocoder_init,
   VERSION,
   "LGPL",
   "GStreamer",
   "http://gstreamer.net/"
   )

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