/* GStreamer

 * Copyright (C) <2006> Philippe Khalaf <burger@speedy.org>

 *

 * 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 <string.h>

#include <stdlib.h>

#include <gst/rtp/gstrtpbuffer.h>

#include <gst/audio/audio.h>

#include "gstrtpilbcdepay.h"

#include "gstrtputils.h"

/* RtpiLBCDepay signals and args */

enum

{

  /* FILL ME */

  LAST_SIGNAL

};

#define DEFAULT_MODE GST_ILBC_MODE_30

enum

{

  PROP_0,

  PROP_MODE

};

/* FIXME, mode should be string because it is a parameter in SDP fmtp */

static GstStaticPadTemplate gst_rtp_ilbc_depay_sink_template =

GST_STATIC_PAD_TEMPLATE ("sink",

    GST_PAD_SINK,

    GST_PAD_ALWAYS,

    GST_STATIC_CAPS ("application/x-rtp, "

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

        "clock-rate = (int) 8000, " "encoding-name = (string) \"ILBC\"")

    /* "mode = (string) { \"20\", \"30\" }" */

    );

static GstStaticPadTemplate gst_rtp_ilbc_depay_src_template =

GST_STATIC_PAD_TEMPLATE ("src",

    GST_PAD_SRC,

    GST_PAD_ALWAYS,

    GST_STATIC_CAPS ("audio/x-iLBC, " "mode = (int) { 20, 30 }")

    );

static void gst_ilbc_depay_set_property (GObject * object,

    guint prop_id, const GValue * value, GParamSpec * pspec);

static void gst_ilbc_depay_get_property (GObject * object,

    guint prop_id, GValue * value, GParamSpec * pspec);

static GstBuffer *gst_rtp_ilbc_depay_process (GstRTPBaseDepayload * depayload,

    GstRTPBuffer * rtp);

static gboolean gst_rtp_ilbc_depay_setcaps (GstRTPBaseDepayload * depayload,

    GstCaps * caps);

#define gst_rtp_ilbc_depay_parent_class parent_class

G_DEFINE_TYPE (GstRTPiLBCDepay, gst_rtp_ilbc_depay,

    GST_TYPE_RTP_BASE_DEPAYLOAD);

#define GST_TYPE_ILBC_MODE (gst_ilbc_mode_get_type())

static GType

gst_ilbc_mode_get_type (void)

{

  static GType ilbc_mode_type = 0;

  static const GEnumValue ilbc_modes[] = {

    {GST_ILBC_MODE_20, "20ms frames", "20ms"},

    {GST_ILBC_MODE_30, "30ms frames", "30ms"},

    {0, NULL, NULL},

  };

  if (!ilbc_mode_type) {

    ilbc_mode_type = g_enum_register_static ("iLBCMode", ilbc_modes);

  }

  return ilbc_mode_type;

}

static void

gst_rtp_ilbc_depay_class_init (GstRTPiLBCDepayClass * klass)

{

  GObjectClass *gobject_class;

  GstElementClass *gstelement_class;

  GstRTPBaseDepayloadClass *gstrtpbasedepayload_class;

  gobject_class = (GObjectClass *) klass;

  gstelement_class = (GstElementClass *) klass;

  gstrtpbasedepayload_class = (GstRTPBaseDepayloadClass *) klass;

  gobject_class->set_property = gst_ilbc_depay_set_property;

  gobject_class->get_property = gst_ilbc_depay_get_property;

  /* FIXME, mode is in the caps */

  g_object_class_install_property (gobject_class, PROP_MODE,

      g_param_spec_enum ("mode", "Mode", "iLBC frame mode",

          GST_TYPE_ILBC_MODE, DEFAULT_MODE,

          G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

  gst_element_class_add_static_pad_template (gstelement_class,

      &gst_rtp_ilbc_depay_src_template);

  gst_element_class_add_static_pad_template (gstelement_class,

      &gst_rtp_ilbc_depay_sink_template);

  gst_element_class_set_static_metadata (gstelement_class,

      "RTP iLBC depayloader", "Codec/Depayloader/Network/RTP",

      "Extracts iLBC audio from RTP packets (RFC 3952)",

      "Philippe Kalaf <philippe.kalaf@collabora.co.uk>");

  gstrtpbasedepayload_class->process_rtp_packet = gst_rtp_ilbc_depay_process;

  gstrtpbasedepayload_class->set_caps = gst_rtp_ilbc_depay_setcaps;

}

static void

gst_rtp_ilbc_depay_init (GstRTPiLBCDepay * rtpilbcdepay)

{

  /* Set default mode */

  rtpilbcdepay->mode = DEFAULT_MODE;

}

static gboolean

gst_rtp_ilbc_depay_setcaps (GstRTPBaseDepayload * depayload, GstCaps * caps)

{

  GstRTPiLBCDepay *rtpilbcdepay = GST_RTP_ILBC_DEPAY (depayload);

  GstCaps *srccaps;

  GstStructure *structure;

  const gchar *mode_str = NULL;

  gint mode, clock_rate;

  gboolean ret;

  structure = gst_caps_get_structure (caps, 0);

  mode = rtpilbcdepay->mode;

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

    clock_rate = 8000;

  depayload->clock_rate = clock_rate;

  /* parse mode, if we can */

  mode_str = gst_structure_get_string (structure, "mode");

  if (mode_str) {

    mode = strtol (mode_str, NULL, 10);

    if (mode != 20 && mode != 30)

      mode = rtpilbcdepay->mode;

  }

  rtpilbcdepay->mode = mode;

  srccaps = gst_caps_new_simple ("audio/x-iLBC",

      "mode", G_TYPE_INT, rtpilbcdepay->mode, NULL);

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

  GST_DEBUG ("set caps on source: %" GST_PTR_FORMAT " (ret=%d)", srccaps, ret);

  gst_caps_unref (srccaps);

  return ret;

}

static GstBuffer *

gst_rtp_ilbc_depay_process (GstRTPBaseDepayload * depayload, GstRTPBuffer * rtp)

{

  GstBuffer *outbuf;

  gboolean marker;

  marker = gst_rtp_buffer_get_marker (rtp);

  GST_DEBUG ("process : got %" G_GSIZE_FORMAT " bytes, mark %d ts %u seqn %d",

      gst_buffer_get_size (rtp->buffer), marker,

      gst_rtp_buffer_get_timestamp (rtp), gst_rtp_buffer_get_seq (rtp));

  outbuf = gst_rtp_buffer_get_payload_buffer (rtp);

  if (marker && outbuf) {

    /* mark start of talkspurt with RESYNC */

    GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_RESYNC);

  }

  if (outbuf) {

    gst_rtp_drop_non_audio_meta (depayload, outbuf);

  }

  return outbuf;

}

static void

gst_ilbc_depay_set_property (GObject * object,

    guint prop_id, const GValue * value, GParamSpec * pspec)

{

  GstRTPiLBCDepay *rtpilbcdepay = GST_RTP_ILBC_DEPAY (object);

  switch (prop_id) {

    case PROP_MODE:

      rtpilbcdepay->mode = g_value_get_enum (value);

      break;

    default:

      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);

      break;

  }

}

static void

gst_ilbc_depay_get_property (GObject * object,

    guint prop_id, GValue * value, GParamSpec * pspec)

{

  GstRTPiLBCDepay *rtpilbcdepay = GST_RTP_ILBC_DEPAY (object);

  switch (prop_id) {

    case PROP_MODE:

      g_value_set_enum (value, rtpilbcdepay->mode);

      break;

    default:

      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);

      break;

  }

}

gboolean

gst_rtp_ilbc_depay_plugin_init (GstPlugin * plugin)

{

  return gst_element_register (plugin, "rtpilbcdepay",

      GST_RANK_SECONDARY, GST_TYPE_RTP_ILBC_DEPAY);

}