/* GStreamer

 * Copyright (C) <2008> Wim Taymans <wim.taymans@gmail.com>

 *

 * 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., 51 Franklin St, Fifth Floor,

 * Boston, MA 02110-1301, USA.

 */

#ifdef HAVE_CONFIG_H

#  include "config.h"

#endif

#include <gst/rtp/gstrtpbuffer.h>

#include <string.h>

#include "gstrtpmp1sdepay.h"

#include "gstrtputils.h"

/* RtpMP1SDepay signals and args */

enum

{

  /* FILL ME */

  LAST_SIGNAL

};

enum

{

  PROP_0,

  PROP_LAST

};

static GstStaticPadTemplate gst_rtp_mp1s_depay_src_template =

GST_STATIC_PAD_TEMPLATE ("src",

    GST_PAD_SRC,

    GST_PAD_ALWAYS,

    GST_STATIC_CAPS ("video/mpeg,systemstream=(boolean)true")

    );

/* The spec says video/MP1S but I have seen streams with other/MP1S so we will

 * allow them both */

static GstStaticPadTemplate gst_rtp_mp1s_depay_sink_template =

    GST_STATIC_PAD_TEMPLATE ("sink",

    GST_PAD_SINK,

    GST_PAD_ALWAYS,

    GST_STATIC_CAPS ("application/x-rtp, "

        "media = (string) \"other\", "

        "clock-rate = (int) [1, MAX ], " "encoding-name = (string) \"MP1S\";"

        "application/x-rtp, "

        "media = (string) \"video\", "

        "clock-rate = (int) [1, MAX ], " "encoding-name = (string) \"MP1S\"")

    );

G_DEFINE_TYPE (GstRtpMP1SDepay, gst_rtp_mp1s_depay,

    GST_TYPE_RTP_BASE_DEPAYLOAD);

static gboolean gst_rtp_mp1s_depay_setcaps (GstRTPBaseDepayload * depayload,

    GstCaps * caps);

static GstBuffer *gst_rtp_mp1s_depay_process (GstRTPBaseDepayload * depayload,

    GstRTPBuffer * rtp);

static void

gst_rtp_mp1s_depay_class_init (GstRtpMP1SDepayClass * klass)

{

  GstElementClass *gstelement_class;

  GstRTPBaseDepayloadClass *gstrtpbasedepayload_class;

  gstelement_class = (GstElementClass *) klass;

  gstrtpbasedepayload_class = (GstRTPBaseDepayloadClass *) klass;

  gstrtpbasedepayload_class->process_rtp_packet = gst_rtp_mp1s_depay_process;

  gstrtpbasedepayload_class->set_caps = gst_rtp_mp1s_depay_setcaps;

  gst_element_class_add_static_pad_template (gstelement_class,

      &gst_rtp_mp1s_depay_src_template);

  gst_element_class_add_static_pad_template (gstelement_class,

      &gst_rtp_mp1s_depay_sink_template);

  gst_element_class_set_static_metadata (gstelement_class,

      "RTP MPEG1 System Stream depayloader", "Codec/Depayloader/Network/RTP",

      "Extracts MPEG1 System Streams from RTP packets (RFC 3555)",

      "Wim Taymans <wim.taymans@gmail.com>");

}

static void

gst_rtp_mp1s_depay_init (GstRtpMP1SDepay * rtpmp1sdepay)

{

}

static gboolean

gst_rtp_mp1s_depay_setcaps (GstRTPBaseDepayload * depayload, GstCaps * caps)

{

  GstCaps *srccaps;

  GstStructure *structure;

  gint clock_rate;

  gboolean res;

  structure = gst_caps_get_structure (caps, 0);

  if (!gst_structure_get_int (structure, "clock-rate", &clock_rate))

    clock_rate = 90000;         /* default */

  depayload->clock_rate = clock_rate;

  srccaps = gst_caps_new_simple ("video/mpeg",

      "systemstream", G_TYPE_BOOLEAN, TRUE, NULL);

  res = gst_pad_set_caps (GST_RTP_BASE_DEPAYLOAD_SRCPAD (depayload), srccaps);

  gst_caps_unref (srccaps);

  return res;

}

static GstBuffer *

gst_rtp_mp1s_depay_process (GstRTPBaseDepayload * depayload, GstRTPBuffer * rtp)

{

  GstBuffer *outbuf;

  outbuf = gst_rtp_buffer_get_payload_buffer (rtp);

  if (outbuf) {

    GST_DEBUG ("gst_rtp_mp1s_depay_chain: pushing buffer of size %"

        G_GSIZE_FORMAT, gst_buffer_get_size (outbuf));

    gst_rtp_drop_meta (GST_ELEMENT_CAST (depayload), outbuf, 0);

  }

  return outbuf;

}

gboolean

gst_rtp_mp1s_depay_plugin_init (GstPlugin * plugin)

{

  return gst_element_register (plugin, "rtpmp1sdepay",

      GST_RANK_SECONDARY, GST_TYPE_RTP_MP1S_DEPAY);

}