/* GStreamer

 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>

 * This file:

 * Copyright (C) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>

 * Copyright (C) 2010 David Schleef <ds@schleef.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.

 */

/**

 * SECTION:element-videoconvert

 * @title: videoconvert

 *

 * Convert video frames between a great variety of video formats.

 *

 * ## Example launch line

 * |[

 * gst-launch-1.0 -v videotestsrc ! video/x-raw,format=YUY2 ! videoconvert ! autovideosink

 * ]|

 *  This will output a test video (generated in YUY2 format) in a video

 * window. If the video sink selected does not support YUY2 videoconvert will

 * automatically convert the video to a format understood by the video sink.

 *

 */

#ifdef HAVE_CONFIG_H

#  include "config.h"

#endif

#include "gstvideoconvert.h"

#include <gst/video/video.h>

#include <gst/video/gstvideometa.h>

#include <gst/video/gstvideopool.h>

#include <string.h>

GST_DEBUG_CATEGORY (videoconvert_debug);

#define GST_CAT_DEFAULT videoconvert_debug

GST_DEBUG_CATEGORY_STATIC (CAT_PERFORMANCE);

GType gst_video_convert_get_type (void);

static GQuark _colorspace_quark;

#define gst_video_convert_parent_class parent_class

G_DEFINE_TYPE (GstVideoConvert, gst_video_convert, GST_TYPE_VIDEO_FILTER);

#define DEFAULT_PROP_DITHER      GST_VIDEO_DITHER_BAYER

#define DEFAULT_PROP_DITHER_QUANTIZATION 1

#define DEFAULT_PROP_CHROMA_RESAMPLER	GST_VIDEO_RESAMPLER_METHOD_LINEAR

#define DEFAULT_PROP_ALPHA_MODE GST_VIDEO_ALPHA_MODE_COPY

#define DEFAULT_PROP_ALPHA_VALUE 1.0

#define DEFAULT_PROP_CHROMA_MODE GST_VIDEO_CHROMA_MODE_FULL

#define DEFAULT_PROP_MATRIX_MODE GST_VIDEO_MATRIX_MODE_FULL

#define DEFAULT_PROP_GAMMA_MODE GST_VIDEO_GAMMA_MODE_NONE

#define DEFAULT_PROP_PRIMARIES_MODE GST_VIDEO_PRIMARIES_MODE_NONE

#define DEFAULT_PROP_N_THREADS 1

enum

{

  PROP_0,

  PROP_DITHER,

  PROP_DITHER_QUANTIZATION,

  PROP_CHROMA_RESAMPLER,

  PROP_ALPHA_MODE,

  PROP_ALPHA_VALUE,

  PROP_CHROMA_MODE,

  PROP_MATRIX_MODE,

  PROP_GAMMA_MODE,

  PROP_PRIMARIES_MODE,

  PROP_N_THREADS

};

#define CSP_VIDEO_CAPS GST_VIDEO_CAPS_MAKE (GST_VIDEO_FORMATS_ALL) ";" \

    GST_VIDEO_CAPS_MAKE_WITH_FEATURES ("ANY", GST_VIDEO_FORMATS_ALL)

static GstStaticPadTemplate gst_video_convert_src_template =

GST_STATIC_PAD_TEMPLATE ("src",

    GST_PAD_SRC,

    GST_PAD_ALWAYS,

    GST_STATIC_CAPS (CSP_VIDEO_CAPS)

    );

static GstStaticPadTemplate gst_video_convert_sink_template =

GST_STATIC_PAD_TEMPLATE ("sink",

    GST_PAD_SINK,

    GST_PAD_ALWAYS,

    GST_STATIC_CAPS (CSP_VIDEO_CAPS)

    );

static void gst_video_convert_set_property (GObject * object,

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

static void gst_video_convert_get_property (GObject * object,

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

static gboolean gst_video_convert_set_info (GstVideoFilter * filter,

    GstCaps * incaps, GstVideoInfo * in_info, GstCaps * outcaps,

    GstVideoInfo * out_info);

static GstFlowReturn gst_video_convert_transform_frame (GstVideoFilter * filter,

    GstVideoFrame * in_frame, GstVideoFrame * out_frame);

/* copies the given caps */

static GstCaps *

gst_video_convert_caps_remove_format_info (GstCaps * caps)

{

  GstStructure *st;

  GstCapsFeatures *f;

  gint i, n;

  GstCaps *res;

  res = gst_caps_new_empty ();

  n = gst_caps_get_size (caps);

  for (i = 0; i < n; i++) {

    st = gst_caps_get_structure (caps, i);

    f = gst_caps_get_features (caps, i);

    /* If this is already expressed by the existing caps

     * skip this structure */

    if (i > 0 && gst_caps_is_subset_structure_full (res, st, f))

      continue;

    st = gst_structure_copy (st);

    /* Only remove format info for the cases when we can actually convert */

    if (!gst_caps_features_is_any (f)

        && gst_caps_features_is_equal (f,

            GST_CAPS_FEATURES_MEMORY_SYSTEM_MEMORY))

      gst_structure_remove_fields (st, "format", "colorimetry", "chroma-site",

          NULL);

    gst_caps_append_structure_full (res, st, gst_caps_features_copy (f));

  }

  return res;

}

/*

 * This is an incomplete matrix of in formats and a score for the prefered output

 * format.

 *

 *         out: RGB24   RGB16  ARGB  AYUV  YUV444  YUV422 YUV420 YUV411 YUV410  PAL  GRAY

 *  in

 * RGB24          0      2       1     2     2       3      4      5      6      7    8

 * RGB16          1      0       1     2     2       3      4      5      6      7    8

 * ARGB           2      3       0     1     4       5      6      7      8      9    10

 * AYUV           3      4       1     0     2       5      6      7      8      9    10

 * YUV444         2      4       3     1     0       5      6      7      8      9    10

 * YUV422         3      5       4     2     1       0      6      7      8      9    10

 * YUV420         4      6       5     3     2       1      0      7      8      9    10

 * YUV411         4      6       5     3     2       1      7      0      8      9    10

 * YUV410         6      8       7     5     4       3      2      1      0      9    10

 * PAL            1      3       2     6     4       6      7      8      9      0    10

 * GRAY           1      4       3     2     1       5      6      7      8      9    0

 *

 * PAL or GRAY are never prefered, if we can we would convert to PAL instead

 * of GRAY, though

 * less subsampling is prefered and if any, preferably horizontal

 * We would like to keep the alpha, even if we would need to to colorspace conversion

 * or lose depth.

 */

#define SCORE_FORMAT_CHANGE       1

#define SCORE_DEPTH_CHANGE        1

#define SCORE_ALPHA_CHANGE        1

#define SCORE_CHROMA_W_CHANGE     1

#define SCORE_CHROMA_H_CHANGE     1

#define SCORE_PALETTE_CHANGE      1

#define SCORE_COLORSPACE_LOSS     2     /* RGB <-> YUV */

#define SCORE_DEPTH_LOSS          4     /* change bit depth */

#define SCORE_ALPHA_LOSS          8     /* lose the alpha channel */

#define SCORE_CHROMA_W_LOSS      16     /* vertical subsample */

#define SCORE_CHROMA_H_LOSS      32     /* horizontal subsample */

#define SCORE_PALETTE_LOSS       64     /* convert to palette format */

#define SCORE_COLOR_LOSS        128     /* convert to GRAY */

#define COLORSPACE_MASK (GST_VIDEO_FORMAT_FLAG_YUV | \

                         GST_VIDEO_FORMAT_FLAG_RGB | GST_VIDEO_FORMAT_FLAG_GRAY)

#define ALPHA_MASK      (GST_VIDEO_FORMAT_FLAG_ALPHA)

#define PALETTE_MASK    (GST_VIDEO_FORMAT_FLAG_PALETTE)

/* calculate how much loss a conversion would be */

static void

score_value (GstBaseTransform * base, const GstVideoFormatInfo * in_info,

    const GValue * val, gint * min_loss, const GstVideoFormatInfo ** out_info)

{

  const gchar *fname;

  const GstVideoFormatInfo *t_info;

  GstVideoFormatFlags in_flags, t_flags;

  gint loss;

  fname = g_value_get_string (val);

  t_info = gst_video_format_get_info (gst_video_format_from_string (fname));

  if (!t_info)

    return;

  /* accept input format immediately without loss */

  if (in_info == t_info) {

    *min_loss = 0;

    *out_info = t_info;

    return;

  }

  loss = SCORE_FORMAT_CHANGE;

  in_flags = GST_VIDEO_FORMAT_INFO_FLAGS (in_info);

  in_flags &= ~GST_VIDEO_FORMAT_FLAG_LE;

  in_flags &= ~GST_VIDEO_FORMAT_FLAG_COMPLEX;

  in_flags &= ~GST_VIDEO_FORMAT_FLAG_UNPACK;

  t_flags = GST_VIDEO_FORMAT_INFO_FLAGS (t_info);

  t_flags &= ~GST_VIDEO_FORMAT_FLAG_LE;

  t_flags &= ~GST_VIDEO_FORMAT_FLAG_COMPLEX;

  t_flags &= ~GST_VIDEO_FORMAT_FLAG_UNPACK;

  if ((t_flags & PALETTE_MASK) != (in_flags & PALETTE_MASK)) {

    loss += SCORE_PALETTE_CHANGE;

    if (t_flags & PALETTE_MASK)

      loss += SCORE_PALETTE_LOSS;

  }

  if ((t_flags & COLORSPACE_MASK) != (in_flags & COLORSPACE_MASK)) {

    loss += SCORE_COLORSPACE_LOSS;

    if (t_flags & GST_VIDEO_FORMAT_FLAG_GRAY)

      loss += SCORE_COLOR_LOSS;

  }

  if ((t_flags & ALPHA_MASK) != (in_flags & ALPHA_MASK)) {

    loss += SCORE_ALPHA_CHANGE;

    if (in_flags & ALPHA_MASK)

      loss += SCORE_ALPHA_LOSS;

  }

  if ((in_info->h_sub[1]) != (t_info->h_sub[1])) {

    loss += SCORE_CHROMA_H_CHANGE;

    if ((in_info->h_sub[1]) < (t_info->h_sub[1]))

      loss += SCORE_CHROMA_H_LOSS;

  }

  if ((in_info->w_sub[1]) != (t_info->w_sub[1])) {

    loss += SCORE_CHROMA_W_CHANGE;

    if ((in_info->w_sub[1]) < (t_info->w_sub[1]))

      loss += SCORE_CHROMA_W_LOSS;

  }

  if ((in_info->bits) != (t_info->bits)) {

    loss += SCORE_DEPTH_CHANGE;

    if ((in_info->bits) > (t_info->bits))

      loss += SCORE_DEPTH_LOSS;

  }

  GST_DEBUG_OBJECT (base, "score %s -> %s = %d",

      GST_VIDEO_FORMAT_INFO_NAME (in_info),

      GST_VIDEO_FORMAT_INFO_NAME (t_info), loss);

  if (loss < *min_loss) {

    GST_DEBUG_OBJECT (base, "found new best %d", loss);

    *out_info = t_info;

    *min_loss = loss;

  }

}

static void

gst_video_convert_fixate_format (GstBaseTransform * base, GstCaps * caps,

    GstCaps * result)

{

  GstStructure *ins, *outs;

  const gchar *in_format;

  const GstVideoFormatInfo *in_info, *out_info = NULL;

  gint min_loss = G_MAXINT;

  guint i, capslen;

  ins = gst_caps_get_structure (caps, 0);

  in_format = gst_structure_get_string (ins, "format");

  if (!in_format)

    return;

  GST_DEBUG_OBJECT (base, "source format %s", in_format);

  in_info =

      gst_video_format_get_info (gst_video_format_from_string (in_format));

  if (!in_info)

    return;

  outs = gst_caps_get_structure (result, 0);

  capslen = gst_caps_get_size (result);

  GST_DEBUG_OBJECT (base, "iterate %d structures", capslen);

  for (i = 0; i < capslen; i++) {

    GstStructure *tests;

    const GValue *format;

    tests = gst_caps_get_structure (result, i);

    format = gst_structure_get_value (tests, "format");

    /* should not happen */

    if (format == NULL)

      continue;

    if (GST_VALUE_HOLDS_LIST (format)) {

      gint j, len;

      len = gst_value_list_get_size (format);

      GST_DEBUG_OBJECT (base, "have %d formats", len);

      for (j = 0; j < len; j++) {

        const GValue *val;

        val = gst_value_list_get_value (format, j);

        if (G_VALUE_HOLDS_STRING (val)) {

          score_value (base, in_info, val, &min_loss, &out_info);

          if (min_loss == 0)

            break;

        }

      }

    } else if (G_VALUE_HOLDS_STRING (format)) {

      score_value (base, in_info, format, &min_loss, &out_info);

    }

  }

  if (out_info)

    gst_structure_set (outs, "format", G_TYPE_STRING,

        GST_VIDEO_FORMAT_INFO_NAME (out_info), NULL);

}

static GstCaps *

gst_video_convert_fixate_caps (GstBaseTransform * trans,

    GstPadDirection direction, GstCaps * caps, GstCaps * othercaps)

{

  GstCaps *result;

  GST_DEBUG_OBJECT (trans, "trying to fixate othercaps %" GST_PTR_FORMAT

      " based on caps %" GST_PTR_FORMAT, othercaps, caps);

  result = gst_caps_intersect (othercaps, caps);

  if (gst_caps_is_empty (result)) {

    gst_caps_unref (result);

    result = othercaps;

  } else {

    gst_caps_unref (othercaps);

  }

  GST_DEBUG_OBJECT (trans, "now fixating %" GST_PTR_FORMAT, result);

  result = gst_caps_make_writable (result);

  gst_video_convert_fixate_format (trans, caps, result);

  /* fixate remaining fields */

  result = gst_caps_fixate (result);

  if (direction == GST_PAD_SINK) {

    if (gst_caps_is_subset (caps, result)) {

      gst_caps_replace (&result, caps);

    }

  }

  return result;

}

static gboolean

gst_video_convert_filter_meta (GstBaseTransform * trans, GstQuery * query,

    GType api, const GstStructure * params)

{

  /* This element cannot passthrough the crop meta, because it would convert the

   * wrong sub-region of the image, and worst, our output image may not be large

   * enough for the crop to be applied later */

  if (api == GST_VIDEO_CROP_META_API_TYPE)

    return FALSE;

  /* propose all other metadata upstream */

  return TRUE;

}

/* The caps can be transformed into any other caps with format info removed.

 * However, we should prefer passthrough, so if passthrough is possible,

 * put it first in the list. */

static GstCaps *

gst_video_convert_transform_caps (GstBaseTransform * btrans,

    GstPadDirection direction, GstCaps * caps, GstCaps * filter)

{

  GstCaps *tmp, *tmp2;

  GstCaps *result;

  /* Get all possible caps that we can transform to */

  tmp = gst_video_convert_caps_remove_format_info (caps);

  if (filter) {

    tmp2 = gst_caps_intersect_full (filter, tmp, GST_CAPS_INTERSECT_FIRST);

    gst_caps_unref (tmp);

    tmp = tmp2;

  }

  result = tmp;

  GST_DEBUG_OBJECT (btrans, "transformed %" GST_PTR_FORMAT " into %"

      GST_PTR_FORMAT, caps, result);

  return result;

}

static gboolean

gst_video_convert_transform_meta (GstBaseTransform * trans, GstBuffer * outbuf,

    GstMeta * meta, GstBuffer * inbuf)

{

  const GstMetaInfo *info = meta->info;

  gboolean ret;

  if (gst_meta_api_type_has_tag (info->api, _colorspace_quark)) {

    /* don't copy colorspace specific metadata, FIXME, we need a MetaTransform

     * for the colorspace metadata. */

    ret = FALSE;

  } else {

    /* copy other metadata */

    ret = TRUE;

  }

  return ret;

}

static gboolean

gst_video_convert_set_info (GstVideoFilter * filter,

    GstCaps * incaps, GstVideoInfo * in_info, GstCaps * outcaps,

    GstVideoInfo * out_info)

{

  GstVideoConvert *space;

  space = GST_VIDEO_CONVERT_CAST (filter);

  if (space->convert) {

    gst_video_converter_free (space->convert);

    space->convert = NULL;

  }

  /* these must match */

  if (in_info->width != out_info->width || in_info->height != out_info->height

      || in_info->fps_n != out_info->fps_n || in_info->fps_d != out_info->fps_d)

    goto format_mismatch;

  /* if present, these must match too */

  if (in_info->par_n != out_info->par_n || in_info->par_d != out_info->par_d)

    goto format_mismatch;

  /* if present, these must match too */

  if (in_info->interlace_mode != out_info->interlace_mode)

    goto format_mismatch;

  space->convert = gst_video_converter_new (in_info, out_info,

      gst_structure_new ("GstVideoConvertConfig",

          GST_VIDEO_CONVERTER_OPT_DITHER_METHOD, GST_TYPE_VIDEO_DITHER_METHOD,

          space->dither,

          GST_VIDEO_CONVERTER_OPT_DITHER_QUANTIZATION, G_TYPE_UINT,

          space->dither_quantization,

          GST_VIDEO_CONVERTER_OPT_CHROMA_RESAMPLER_METHOD,

          GST_TYPE_VIDEO_RESAMPLER_METHOD, space->chroma_resampler,

          GST_VIDEO_CONVERTER_OPT_ALPHA_MODE,

          GST_TYPE_VIDEO_ALPHA_MODE, space->alpha_mode,

          GST_VIDEO_CONVERTER_OPT_ALPHA_VALUE,

          G_TYPE_DOUBLE, space->alpha_value,

          GST_VIDEO_CONVERTER_OPT_CHROMA_MODE,

          GST_TYPE_VIDEO_CHROMA_MODE, space->chroma_mode,

          GST_VIDEO_CONVERTER_OPT_MATRIX_MODE,

          GST_TYPE_VIDEO_MATRIX_MODE, space->matrix_mode,

          GST_VIDEO_CONVERTER_OPT_GAMMA_MODE,

          GST_TYPE_VIDEO_GAMMA_MODE, space->gamma_mode,

          GST_VIDEO_CONVERTER_OPT_PRIMARIES_MODE,

          GST_TYPE_VIDEO_PRIMARIES_MODE, space->primaries_mode,

          GST_VIDEO_CONVERTER_OPT_THREADS, G_TYPE_UINT,

          space->n_threads, NULL));

  if (space->convert == NULL)

    goto no_convert;

  GST_DEBUG ("reconfigured %d %d", GST_VIDEO_INFO_FORMAT (in_info),

      GST_VIDEO_INFO_FORMAT (out_info));

  return TRUE;

  /* ERRORS */

format_mismatch:

  {

    GST_ERROR_OBJECT (space, "input and output formats do not match");

    return FALSE;

  }

no_convert:

  {

    GST_ERROR_OBJECT (space, "could not create converter");

    return FALSE;

  }

}

static void

gst_video_convert_finalize (GObject * obj)

{

  GstVideoConvert *space = GST_VIDEO_CONVERT (obj);

  if (space->convert) {

    gst_video_converter_free (space->convert);

  }

  G_OBJECT_CLASS (parent_class)->finalize (obj);

}

static void

gst_video_convert_class_init (GstVideoConvertClass * klass)

{

  GObjectClass *gobject_class = (GObjectClass *) klass;

  GstElementClass *gstelement_class = (GstElementClass *) klass;

  GstBaseTransformClass *gstbasetransform_class =

      (GstBaseTransformClass *) klass;

  GstVideoFilterClass *gstvideofilter_class = (GstVideoFilterClass *) klass;

  gobject_class->set_property = gst_video_convert_set_property;

  gobject_class->get_property = gst_video_convert_get_property;

  gobject_class->finalize = gst_video_convert_finalize;

  gst_element_class_add_static_pad_template (gstelement_class,

      &gst_video_convert_src_template);

  gst_element_class_add_static_pad_template (gstelement_class,

      &gst_video_convert_sink_template);

  gst_element_class_set_static_metadata (gstelement_class,

      "Colorspace converter", "Filter/Converter/Video",

      "Converts video from one colorspace to another",

      "GStreamer maintainers <gstreamer-devel@lists.freedesktop.org>");

  gstbasetransform_class->transform_caps =

      GST_DEBUG_FUNCPTR (gst_video_convert_transform_caps);

  gstbasetransform_class->fixate_caps =

      GST_DEBUG_FUNCPTR (gst_video_convert_fixate_caps);

  gstbasetransform_class->filter_meta =

      GST_DEBUG_FUNCPTR (gst_video_convert_filter_meta);

  gstbasetransform_class->transform_meta =

      GST_DEBUG_FUNCPTR (gst_video_convert_transform_meta);

  gstbasetransform_class->passthrough_on_same_caps = TRUE;

  gstvideofilter_class->set_info =

      GST_DEBUG_FUNCPTR (gst_video_convert_set_info);

  gstvideofilter_class->transform_frame =

      GST_DEBUG_FUNCPTR (gst_video_convert_transform_frame);

  g_object_class_install_property (gobject_class, PROP_DITHER,

      g_param_spec_enum ("dither", "Dither", "Apply dithering while converting",

          gst_video_dither_method_get_type (), DEFAULT_PROP_DITHER,

          G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

  g_object_class_install_property (gobject_class, PROP_DITHER_QUANTIZATION,

      g_param_spec_uint ("dither-quantization", "Dither Quantize",

          "Quantizer to use", 0, G_MAXUINT, DEFAULT_PROP_DITHER_QUANTIZATION,

          G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

  g_object_class_install_property (gobject_class, PROP_CHROMA_RESAMPLER,

      g_param_spec_enum ("chroma-resampler", "Chroma resampler",

          "Chroma resampler method", gst_video_resampler_method_get_type (),

          DEFAULT_PROP_CHROMA_RESAMPLER,

          G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

  g_object_class_install_property (gobject_class, PROP_ALPHA_MODE,

      g_param_spec_enum ("alpha-mode", "Alpha Mode",

          "Alpha Mode to use", gst_video_alpha_mode_get_type (),

          DEFAULT_PROP_ALPHA_MODE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

  g_object_class_install_property (gobject_class, PROP_ALPHA_VALUE,

      g_param_spec_double ("alpha-value", "Alpha Value",

          "Alpha Value to use", 0.0, 1.0,

          DEFAULT_PROP_ALPHA_VALUE,

          G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

  g_object_class_install_property (gobject_class, PROP_CHROMA_MODE,

      g_param_spec_enum ("chroma-mode", "Chroma Mode", "Chroma Resampling Mode",

          gst_video_chroma_mode_get_type (), DEFAULT_PROP_CHROMA_MODE,

          G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

  g_object_class_install_property (gobject_class, PROP_MATRIX_MODE,

      g_param_spec_enum ("matrix-mode", "Matrix Mode", "Matrix Conversion Mode",

          gst_video_matrix_mode_get_type (), DEFAULT_PROP_MATRIX_MODE,

          G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

  g_object_class_install_property (gobject_class, PROP_GAMMA_MODE,

      g_param_spec_enum ("gamma-mode", "Gamma Mode", "Gamma Conversion Mode",

          gst_video_gamma_mode_get_type (), DEFAULT_PROP_GAMMA_MODE,

          G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

  g_object_class_install_property (gobject_class, PROP_PRIMARIES_MODE,

      g_param_spec_enum ("primaries-mode", "Primaries Mode",

          "Primaries Conversion Mode", gst_video_primaries_mode_get_type (),

          DEFAULT_PROP_PRIMARIES_MODE,

          G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

  g_object_class_install_property (gobject_class, PROP_N_THREADS,

      g_param_spec_uint ("n-threads", "Threads",

          "Maximum number of threads to use", 0, G_MAXUINT,

          DEFAULT_PROP_N_THREADS, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

}

static void

gst_video_convert_init (GstVideoConvert * space)

{

  space->dither = DEFAULT_PROP_DITHER;

  space->dither_quantization = DEFAULT_PROP_DITHER_QUANTIZATION;

  space->chroma_resampler = DEFAULT_PROP_CHROMA_RESAMPLER;

  space->alpha_mode = DEFAULT_PROP_ALPHA_MODE;

  space->alpha_value = DEFAULT_PROP_ALPHA_VALUE;

  space->chroma_mode = DEFAULT_PROP_CHROMA_MODE;

  space->matrix_mode = DEFAULT_PROP_MATRIX_MODE;

  space->gamma_mode = DEFAULT_PROP_GAMMA_MODE;

  space->primaries_mode = DEFAULT_PROP_PRIMARIES_MODE;

  space->n_threads = DEFAULT_PROP_N_THREADS;

}

void

gst_video_convert_set_property (GObject * object, guint property_id,

    const GValue * value, GParamSpec * pspec)

{

  GstVideoConvert *csp;

  csp = GST_VIDEO_CONVERT (object);

  switch (property_id) {

    case PROP_DITHER:

      csp->dither = g_value_get_enum (value);

      break;

    case PROP_CHROMA_RESAMPLER:

      csp->chroma_resampler = g_value_get_enum (value);

      break;

    case PROP_ALPHA_MODE:

      csp->alpha_mode = g_value_get_enum (value);

      break;

    case PROP_ALPHA_VALUE:

      csp->alpha_value = g_value_get_double (value);

      break;

    case PROP_CHROMA_MODE:

      csp->chroma_mode = g_value_get_enum (value);

      break;

    case PROP_MATRIX_MODE:

      csp->matrix_mode = g_value_get_enum (value);

      break;

    case PROP_GAMMA_MODE:

      csp->gamma_mode = g_value_get_enum (value);

      break;

    case PROP_PRIMARIES_MODE:

      csp->primaries_mode = g_value_get_enum (value);

      break;

    case PROP_DITHER_QUANTIZATION:

      csp->dither_quantization = g_value_get_uint (value);

      break;

    case PROP_N_THREADS:

      csp->n_threads = g_value_get_uint (value);

      break;

    default:

      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);

      break;

  }

}

void

gst_video_convert_get_property (GObject * object, guint property_id,

    GValue * value, GParamSpec * pspec)

{

  GstVideoConvert *csp;

  csp = GST_VIDEO_CONVERT (object);

  switch (property_id) {

    case PROP_DITHER:

      g_value_set_enum (value, csp->dither);

      break;

    case PROP_CHROMA_RESAMPLER:

      g_value_set_enum (value, csp->chroma_resampler);

      break;

    case PROP_ALPHA_MODE:

      g_value_set_enum (value, csp->alpha_mode);

      break;

    case PROP_ALPHA_VALUE:

      g_value_set_double (value, csp->alpha_value);

      break;

    case PROP_CHROMA_MODE:

      g_value_set_enum (value, csp->chroma_mode);

      break;

    case PROP_MATRIX_MODE:

      g_value_set_enum (value, csp->matrix_mode);

      break;

    case PROP_GAMMA_MODE:

      g_value_set_enum (value, csp->gamma_mode);

      break;

    case PROP_PRIMARIES_MODE:

      g_value_set_enum (value, csp->primaries_mode);

      break;

    case PROP_DITHER_QUANTIZATION:

      g_value_set_uint (value, csp->dither_quantization);

      break;

    case PROP_N_THREADS:

      g_value_set_uint (value, csp->n_threads);

      break;

    default:

      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);

      break;

  }

}

static GstFlowReturn

gst_video_convert_transform_frame (GstVideoFilter * filter,

    GstVideoFrame * in_frame, GstVideoFrame * out_frame)

{

  GstVideoConvert *space;

  space = GST_VIDEO_CONVERT_CAST (filter);

  GST_CAT_DEBUG_OBJECT (CAT_PERFORMANCE, filter,

      "doing colorspace conversion from %s -> to %s",

      GST_VIDEO_INFO_NAME (&filter->in_info),

      GST_VIDEO_INFO_NAME (&filter->out_info));

  gst_video_converter_frame (space->convert, in_frame, out_frame);

  return GST_FLOW_OK;

}

static gboolean

plugin_init (GstPlugin * plugin)

{

  GST_DEBUG_CATEGORY_INIT (videoconvert_debug, "videoconvert", 0,

      "Colorspace Converter");

  GST_DEBUG_CATEGORY_GET (CAT_PERFORMANCE, "GST_PERFORMANCE");

  _colorspace_quark = g_quark_from_static_string ("colorspace");

  return gst_element_register (plugin, "videoconvert",

      GST_RANK_NONE, GST_TYPE_VIDEO_CONVERT);

}

GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,

    GST_VERSION_MINOR,

    videoconvert, "Colorspace conversion", plugin_init, VERSION, GST_LICENSE,

    GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)