/* GStreamer

 * Copyright (C) <2005> Philippe Khalaf <burger@speedy.org> 

 * Copyright (C) <2005> Nokia Corporation <kai.vehmanen@nokia.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., 59 Temple Place - Suite 330,

 * Boston, MA 02111-1307, USA.

 */

/**

 * SECTION:gstbasertpdepayload

 * @short_description: Base class for RTP depayloader

 *

 * <refsect2>

 * <para>

 * Provides a base class for RTP depayloaders

 * </para>

 * </refsect2>

 */

#include "gstbasertpdepayload.h"

#ifdef GST_DISABLE_DEPRECATED

#define QUEUE_LOCK_INIT(base)   (g_static_rec_mutex_init(&base->queuelock))

#define QUEUE_LOCK_FREE(base)   (g_static_rec_mutex_free(&base->queuelock))

#define QUEUE_LOCK(base)        (g_static_rec_mutex_lock(&base->queuelock))

#define QUEUE_UNLOCK(base)      (g_static_rec_mutex_unlock(&base->queuelock))

#else

/* otherwise it's already been defined in the header (FIXME 0.11)*/

#endif

GST_DEBUG_CATEGORY_STATIC (basertpdepayload_debug);

#define GST_CAT_DEFAULT (basertpdepayload_debug)

#define GST_BASE_RTP_DEPAYLOAD_GET_PRIVATE(obj)  \

   (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GST_TYPE_BASE_RTP_DEPAYLOAD, GstBaseRTPDepayloadPrivate))

struct _GstBaseRTPDepayloadPrivate

{

  GstClockTime npt_start;

  GstClockTime npt_stop;

  gdouble play_speed;

  gdouble play_scale;

  gboolean discont;

  GstClockTime timestamp;

  GstClockTime duration;

};

/* Filter signals and args */

enum

{

  /* FILL ME */

  LAST_SIGNAL

};

#define DEFAULT_QUEUE_DELAY	0

enum

{

  PROP_0,

};

static void gst_base_rtp_depayload_finalize (GObject * object);

static void gst_base_rtp_depayload_set_property (GObject * object,

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

static void gst_base_rtp_depayload_get_property (GObject * object,

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

static gboolean gst_base_rtp_depayload_setcaps (GstPad * pad, GstCaps * caps);

static GstFlowReturn gst_base_rtp_depayload_chain (GstPad * pad,

    GstBuffer * in);

static gboolean gst_base_rtp_depayload_handle_sink_event (GstPad * pad,

    GstEvent * event);

static GstStateChangeReturn gst_base_rtp_depayload_change_state (GstElement *

    element, GstStateChange transition);

static void gst_base_rtp_depayload_set_gst_timestamp

    (GstBaseRTPDepayload * filter, guint32 rtptime, GstBuffer * buf);

GST_BOILERPLATE (GstBaseRTPDepayload, gst_base_rtp_depayload, GstElement,

    GST_TYPE_ELEMENT);

static void

gst_base_rtp_depayload_base_init (gpointer klass)

{

  /*GstElementClass *element_class = GST_ELEMENT_CLASS (klass); */

}

static void

gst_base_rtp_depayload_class_init (GstBaseRTPDepayloadClass * klass)

{

  GObjectClass *gobject_class;

  GstElementClass *gstelement_class;

  gobject_class = G_OBJECT_CLASS (klass);

  gstelement_class = (GstElementClass *) klass;

  parent_class = g_type_class_peek_parent (klass);

  g_type_class_add_private (klass, sizeof (GstBaseRTPDepayloadPrivate));

  gobject_class->finalize = gst_base_rtp_depayload_finalize;

  gobject_class->set_property = gst_base_rtp_depayload_set_property;

  gobject_class->get_property = gst_base_rtp_depayload_get_property;

  /**

   * GstBaseRTPDepayload::queue-delay

   *

   * Control the amount of packets to buffer.

   *

   * Deprecated: Use a jitterbuffer or RTP session manager to delay packet

   * playback. This property has no effect anymore since 0.10.15.

   */

#ifndef GST_REMOVE_DEPRECATED

  g_object_class_install_property (gobject_class, PROP_QUEUE_DELAY,

      g_param_spec_uint ("queue-delay", "Queue Delay",

          "Amount of ms to queue/buffer, deprecated", 0, G_MAXUINT,

#endif

  gstelement_class->change_state = gst_base_rtp_depayload_change_state;

  klass->set_gst_timestamp = gst_base_rtp_depayload_set_gst_timestamp;

  GST_DEBUG_CATEGORY_INIT (basertpdepayload_debug, "basertpdepayload", 0,

      "Base class for RTP Depayloaders");

}

static void

gst_base_rtp_depayload_init (GstBaseRTPDepayload * filter,

    GstBaseRTPDepayloadClass * klass)

{

  GstPadTemplate *pad_template;

  GstBaseRTPDepayloadPrivate *priv;

  priv = GST_BASE_RTP_DEPAYLOAD_GET_PRIVATE (filter);

  filter->priv = priv;

  GST_DEBUG_OBJECT (filter, "init");

  pad_template =

      gst_element_class_get_pad_template (GST_ELEMENT_CLASS (klass), "sink");

  g_return_if_fail (pad_template != NULL);

  filter->sinkpad = gst_pad_new_from_template (pad_template, "sink");

  gst_pad_set_setcaps_function (filter->sinkpad,

      gst_base_rtp_depayload_setcaps);

  gst_pad_set_chain_function (filter->sinkpad, gst_base_rtp_depayload_chain);

  gst_pad_set_event_function (filter->sinkpad,

      gst_base_rtp_depayload_handle_sink_event);

  gst_element_add_pad (GST_ELEMENT (filter), filter->sinkpad);

  pad_template =

      gst_element_class_get_pad_template (GST_ELEMENT_CLASS (klass), "src");

  g_return_if_fail (pad_template != NULL);

  filter->srcpad = gst_pad_new_from_template (pad_template, "src");

  gst_pad_use_fixed_caps (filter->srcpad);

  gst_element_add_pad (GST_ELEMENT (filter), filter->srcpad);

  filter->queue = g_queue_new ();

  filter->queue_delay = DEFAULT_QUEUE_DELAY;

  gst_segment_init (&filter->segment, GST_FORMAT_UNDEFINED);

}

static void

gst_base_rtp_depayload_finalize (GObject * object)

{

  GstBaseRTPDepayload *filter = GST_BASE_RTP_DEPAYLOAD (object);

  g_queue_free (filter->queue);

  G_OBJECT_CLASS (parent_class)->finalize (object);

}

static gboolean

gst_base_rtp_depayload_setcaps (GstPad * pad, GstCaps * caps)

{

  GstBaseRTPDepayload *filter;

  GstBaseRTPDepayloadClass *bclass;

  GstBaseRTPDepayloadPrivate *priv;

  gboolean res;

  GstStructure *caps_struct;

  const GValue *value;

  filter = GST_BASE_RTP_DEPAYLOAD (gst_pad_get_parent (pad));

  priv = filter->priv;

  bclass = GST_BASE_RTP_DEPAYLOAD_GET_CLASS (filter);

  GST_DEBUG_OBJECT (filter, "Set caps");

  caps_struct = gst_caps_get_structure (caps, 0);

  /* get other values for newsegment */

  value = gst_structure_get_value (caps_struct, "npt-start");

  if (value && G_VALUE_HOLDS_UINT64 (value))

    priv->npt_start = g_value_get_uint64 (value);

  else

    priv->npt_start = 0;

  GST_DEBUG_OBJECT (filter, "NPT start %" G_GUINT64_FORMAT, priv->npt_start);

  value = gst_structure_get_value (caps_struct, "npt-stop");

  if (value && G_VALUE_HOLDS_UINT64 (value))

    priv->npt_stop = g_value_get_uint64 (value);

  else

    priv->npt_stop = -1;

  GST_DEBUG_OBJECT (filter, "NPT stop %" G_GUINT64_FORMAT, priv->npt_stop);

  value = gst_structure_get_value (caps_struct, "play-speed");

  if (value && G_VALUE_HOLDS_DOUBLE (value))

    priv->play_speed = g_value_get_double (value);

  else

    priv->play_speed = 1.0;

  value = gst_structure_get_value (caps_struct, "play-scale");

  if (value && G_VALUE_HOLDS_DOUBLE (value))

    priv->play_scale = g_value_get_double (value);

  else

    priv->play_scale = 1.0;

  if (bclass->set_caps)

    res = bclass->set_caps (filter, caps);

  else

    res = TRUE;

  gst_object_unref (filter);

  return res;

}

static GstFlowReturn

gst_base_rtp_depayload_chain (GstPad * pad, GstBuffer * in)

{

  GstBaseRTPDepayload *filter;

  GstBaseRTPDepayloadPrivate *priv;

  GstBaseRTPDepayloadClass *bclass;

  GstFlowReturn ret = GST_FLOW_OK;

  GstBuffer *out_buf;

  GstClockTime timestamp;

  filter = GST_BASE_RTP_DEPAYLOAD (GST_OBJECT_PARENT (pad));

  priv->discont = GST_BUFFER_IS_DISCONT (in);

  /* convert to running_time and save the timestamp, this is the timestamp

   * we put on outgoing buffers. */

  timestamp = gst_segment_to_running_time (&filter->segment, GST_FORMAT_TIME,

      timestamp);

  priv->timestamp = timestamp;

  priv->duration = GST_BUFFER_DURATION (in);

  bclass = GST_BASE_RTP_DEPAYLOAD_GET_CLASS (filter);

  /* let's send it out to processing */

  out_buf = bclass->process (filter, in);

  if (out_buf) {

    /* we pass rtptime as backward compatibility, in reality, the incomming

     * buffer timestamp is always applied to the outgoing packet. */

    ret = gst_base_rtp_depayload_push_ts (filter, rtptime, out_buf);

  }

  gst_buffer_unref (in);

  return ret;

}

static gboolean

gst_base_rtp_depayload_handle_sink_event (GstPad * pad, GstEvent * event)

{

  GstBaseRTPDepayload *filter;

  gboolean res = TRUE;

  filter = GST_BASE_RTP_DEPAYLOAD (GST_OBJECT_PARENT (pad));

  switch (GST_EVENT_TYPE (event)) {

    case GST_EVENT_FLUSH_STOP:

      res = gst_pad_push_event (filter->srcpad, event);

      gst_segment_init (&filter->segment, GST_FORMAT_UNDEFINED);

      filter->need_newsegment = TRUE;

      break;

    case GST_EVENT_NEWSEGMENT:

    {

      gboolean update;

      gdouble rate;

      GstFormat fmt;

      gint64 start, stop, position;

      gst_event_parse_new_segment (event, &update, &rate, &fmt, &start, &stop,

          &position);

      gst_segment_set_newsegment (&filter->segment, update, rate, fmt,

          start, stop, position);

      /* don't pass the event downstream, we generate our own segment including

       * the NTP time and other things we receive in caps */

      gst_event_unref (event);

      break;

    }

    default:

      /* pass other events forward */

      res = gst_pad_push_event (filter->srcpad, event);

      break;

  }

  return res;

}

static GstFlowReturn

gst_base_rtp_depayload_push_full (GstBaseRTPDepayload * filter,

    gboolean do_ts, guint32 rtptime, GstBuffer * out_buf)

{

  GstFlowReturn ret;

  GstCaps *srccaps;

  GstBaseRTPDepayloadClass *bclass;

  GstBaseRTPDepayloadPrivate *priv;

  priv = filter->priv;

  /* set the caps if any */

  srccaps = GST_PAD_CAPS (filter->srcpad);

    gst_buffer_set_caps (out_buf, srccaps);

  bclass = GST_BASE_RTP_DEPAYLOAD_GET_CLASS (filter);

  /* set the timestamp if we must and can */

  if (bclass->set_gst_timestamp && do_ts)

    bclass->set_gst_timestamp (filter, rtptime, out_buf);

    GST_BUFFER_FLAG_SET (out_buf, GST_BUFFER_FLAG_DISCONT);

    priv->discont = FALSE;

  }