gstreamer/gst/rtjpeg/gstrtjpegdec.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 "gstrtjpegdec.h"



/* elementfactory information */
static const GstElementDetails gst_rtjpegdec_details =
GST_ELEMENT_DETAILS ("RTjpeg video decoder",
    "Codec/Decoder/Video",
    "Decodes video in RTjpeg format",
    "Erik Walthinsen <omega@cse.ogi.edu>");

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

enum
{
  ARG_0,
  ARG_QUALITY
};


static void gst_rtjpegdec_class_init (GstRTJpegDecClass * klass);
static void gst_rtjpegdec_base_init (GstRTJpegDecClass * klass);
static void gst_rtjpegdec_init (GstRTJpegDec * rtjpegdec);

static void gst_rtjpegdec_chain (GstPad * pad, GstData * _data);

static GstElementClass *parent_class = NULL;

/*static guint gst_rtjpegdec_signals[LAST_SIGNAL] = { 0 }; */

GType
gst_rtjpegdec_get_type (void)
{
  static GType rtjpegdec_type = 0;

  if (!rtjpegdec_type) {
    static const GTypeInfo rtjpegdec_info = {
      sizeof (GstRTJpegDecClass),
      (GBaseInitFunc) gst_rtjpegdec_base_init,
      NULL,
      (GClassInitFunc) gst_rtjpegdec_class_init,
      NULL,
      NULL,
      sizeof (GstRTJpegDec),
      0,
      (GInstanceInitFunc) gst_rtjpegdec_init,
    };

    rtjpegdec_type =
        g_type_register_static (GST_TYPE_ELEMENT, "GstRTJpegDec",
        &rtjpegdec_info, 0);
  }
  return rtjpegdec_type;
}

static void
gst_rtjpegdec_base_init (GstRTJpegDecClass * klass)
{
  GstElementClass *element_class = GST_ELEMENT_CLASS (klass);

  gst_element_class_set_details (element_class, &gst_rtjpegdec_details);
}

static void
gst_rtjpegdec_class_init (GstRTJpegDecClass * klass)
{
  GstElementClass *gstelement_class;

  gstelement_class = (GstElementClass *) klass;

  parent_class = g_type_class_peek_parent (klass);
}

static void
gst_rtjpegdec_init (GstRTJpegDec * rtjpegdec)
{
  rtjpegdec->sinkpad = gst_pad_new ("sink", GST_PAD_SINK);
  gst_element_add_pad (GST_ELEMENT (rtjpegdec), rtjpegdec->sinkpad);
  gst_pad_set_chain_function (rtjpegdec->sinkpad, gst_rtjpegdec_chain);
  rtjpegdec->srcpad = gst_pad_new ("src", GST_PAD_SRC);
  gst_element_add_pad (GST_ELEMENT (rtjpegdec), rtjpegdec->srcpad);
}

static void
gst_rtjpegdec_chain (GstPad * pad, GstData * _data)
{
  GstBuffer *buf = GST_BUFFER (_data);
  GstRTJpegDec *rtjpegdec;
  guchar *data;
  gulong size;

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

  rtjpegdec = GST_RTJPEGDEC (GST_OBJECT_PARENT (pad));
  data = GST_BUFFER_DATA (buf);
  size = GST_BUFFER_SIZE (buf);

  g_warning ("would be encoding frame here\n");

  gst_pad_push (rtjpegdec->srcpad, GST_DATA (buf));
}