/* GStreamer

 * Copyright (C) <2011> Sebastian Dröge <sebastian.droege@collabora.co.uk>

 *

 * 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 "gstplaysinkvideoconvert.h"

#include <gst/pbutils/pbutils.h>

#include <gst/gst-i18n-plugin.h>

GST_DEBUG_CATEGORY_STATIC (gst_play_sink_video_convert_debug);

#define GST_CAT_DEFAULT gst_play_sink_video_convert_debug

#define parent_class gst_play_sink_video_convert_parent_class

G_DEFINE_TYPE (GstPlaySinkVideoConvert, gst_play_sink_video_convert,

    GST_TYPE_PLAY_SINK_CONVERT_BIN);

enum

{

  PROP_0,

  PROP_USE_CONVERTERS,

  PROP_USE_BALANCE,

};

static gboolean

gst_play_sink_video_convert_add_conversion_elements (GstPlaySinkVideoConvert *

    self)

{

  GstPlaySinkConvertBin *cbin = GST_PLAY_SINK_CONVERT_BIN (self);

  GstElement *el, *prev = NULL;

  g_assert (cbin->conversion_elements == NULL);

  GST_DEBUG_OBJECT (self,

      "Building video conversion with use-converters %d, use-balance %d",

      self->use_converters, self->use_balance);

  if (self->use_converters) {

    el = gst_play_sink_convert_bin_add_conversion_element_factory (cbin,

        COLORSPACE, "conv");

    if (el)

      prev = el;

    el = gst_play_sink_convert_bin_add_conversion_element_factory (cbin,

        "videoscale", "scale");

    if (el) {

      /* Add black borders if necessary to keep the DAR */

      g_object_set (el, "add-borders", TRUE, NULL);

      if (prev) {

        if (!gst_element_link_pads_full (prev, "src", el, "sink",

                GST_PAD_LINK_CHECK_TEMPLATE_CAPS))

          goto link_failed;

      }

      prev = el;

    }

  }

  if (self->use_balance && self->balance) {

    el = self->balance;

    gst_play_sink_convert_bin_add_conversion_element (cbin, el);

    if (prev) {

      if (!gst_element_link_pads_full (prev, "src", el, "sink",

              GST_PAD_LINK_CHECK_TEMPLATE_CAPS))

        goto link_failed;

    }

    prev = el;

    el = gst_play_sink_convert_bin_add_conversion_element_factory (cbin,

        COLORSPACE, "conv2");

    if (prev) {

      if (!gst_element_link_pads_full (prev, "src", el, "sink",

              GST_PAD_LINK_CHECK_TEMPLATE_CAPS))

        goto link_failed;

    }

    if (el)

      prev = el;

  }

  return TRUE;

link_failed:

  return FALSE;

}

static void

gst_play_sink_video_convert_finalize (GObject * object)

{

  GstPlaySinkVideoConvert *self = GST_PLAY_SINK_VIDEO_CONVERT_CAST (object);

  if (self->balance)

    gst_object_unref (self->balance);

  G_OBJECT_CLASS (parent_class)->finalize (object);

}

static void

gst_play_sink_video_convert_set_property (GObject * object, guint prop_id,

    const GValue * value, GParamSpec * pspec)

{

  GstPlaySinkVideoConvert *self = GST_PLAY_SINK_VIDEO_CONVERT_CAST (object);

  gboolean v, changed = FALSE;

  GST_PLAY_SINK_CONVERT_BIN_LOCK (self);

  switch (prop_id) {

    case PROP_USE_CONVERTERS:

      v = g_value_get_boolean (value);

      if (v != self->use_converters) {

        self->use_converters = v;

        changed = TRUE;

      }

      break;

    case PROP_USE_BALANCE:

      v = g_value_get_boolean (value);

      if (v != self->use_balance) {

        self->use_balance = v;

        changed = TRUE;

      }

      break;

    default:

      break;

  }

  if (changed) {

    GstPlaySinkConvertBin *cbin = GST_PLAY_SINK_CONVERT_BIN (self);

    GST_DEBUG_OBJECT (self, "Rebuilding converter bin");

    gst_play_sink_convert_bin_remove_elements (cbin);

    gst_play_sink_video_convert_add_conversion_elements (self);

    gst_play_sink_convert_bin_add_identity (cbin);

    gst_play_sink_convert_bin_cache_converter_caps (cbin);

  }

  GST_PLAY_SINK_CONVERT_BIN_UNLOCK (self);

}

static void

gst_play_sink_video_convert_get_property (GObject * object, guint prop_id,

    GValue * value, GParamSpec * pspec)

{

  GstPlaySinkVideoConvert *self = GST_PLAY_SINK_VIDEO_CONVERT_CAST (object);

  GST_PLAY_SINK_CONVERT_BIN_LOCK (self);

  switch (prop_id) {

    case PROP_USE_CONVERTERS:

      g_value_set_boolean (value, self->use_converters);

      break;

    case PROP_USE_BALANCE:

      g_value_set_boolean (value, self->use_balance);

      break;

    default:

      break;

  }

  GST_PLAY_SINK_CONVERT_BIN_UNLOCK (self);

}

static void

gst_play_sink_video_convert_class_init (GstPlaySinkVideoConvertClass * klass)

{

  GObjectClass *gobject_class;

  GstElementClass *gstelement_class;

  GST_DEBUG_CATEGORY_INIT (gst_play_sink_video_convert_debug,

      "playsinkvideoconvert", 0, "play bin");

  gobject_class = (GObjectClass *) klass;

  gstelement_class = (GstElementClass *) klass;

  gobject_class->finalize = gst_play_sink_video_convert_finalize;

  gobject_class->set_property = gst_play_sink_video_convert_set_property;

  gobject_class->get_property = gst_play_sink_video_convert_get_property;

  g_object_class_install_property (gobject_class, PROP_USE_CONVERTERS,

      g_param_spec_boolean ("use-converters", "Use converters",

          "Whether to use conversion elements", FALSE,

          G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

  g_object_class_install_property (gobject_class, PROP_USE_BALANCE,

      g_param_spec_boolean ("use-balance", "Use balance",

          "Whether to use a videobalance element", FALSE,

          G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

  gst_element_class_set_static_metadata (gstelement_class,

      "Player Sink Video Converter", "Video/Bin/Converter",

      "Convenience bin for video conversion",

      "Sebastian Dröge <sebastian.droege@collabora.co.uk>");

}

static void

gst_play_sink_video_convert_init (GstPlaySinkVideoConvert * self)

{

  GstPlaySinkConvertBin *cbin = GST_PLAY_SINK_CONVERT_BIN (self);

  cbin->audio = FALSE;

  /* FIXME: Only create this on demand but for now we need

   * it to always exist because of playsink's color balance

   * proxying logic.

   */

  self->balance = gst_element_factory_make ("videobalance", "videobalance");

  if (self->balance)

    gst_object_ref_sink (self->balance);

  gst_play_sink_video_convert_add_conversion_elements (self);

  gst_play_sink_convert_bin_cache_converter_caps (cbin);

}