gstalpha.c 75.6 KB
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/* GStreamer
 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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 * Copyright (C) <2007> Wim Taymans <wim.taymans@collabora.co.uk>
 * Copyright (C) <2007> Edward Hervey <edward.hervey@collabora.co.uk>
 * Copyright (C) <2007> Jan Schmidt <thaytan@noraisin.net>
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 *
 * 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.
 */

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/**
 * SECTION:element-alpha
 * 
 * The alpha element adds an alpha channel to a video stream. The values
 * of the alpha channel can be either be set to a constant or can be
 * dynamically calculated via chroma keying, e.g. blue can be set as
 * the transparent color.
 *
 * Sample pipeline:
 * |[
 * gst-launch videotestsrc pattern=smpte75 ! alpha method=green ! \
 *   videomixer name=mixer ! ffmpegcolorspace ! autovideosink     \
 *   videotestsrc pattern=snow ! mixer.
 * ]| This pipeline adds a alpha channel to the SMPTE color bars
 * with green as the transparent color and mixes the output with
 * a snow video stream.
 */


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#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
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#include "gstalpha.h"
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#include <stdlib.h>
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#include <string.h>
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#include <math.h>
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#ifndef M_PI
#define M_PI  3.14159265358979323846
#endif

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/* Generated by -bad/ext/cog/generate_tables */
static const int cog_ycbcr_to_rgb_matrix_8bit_hdtv[] = {
  298, 0, 459, -63514,
  298, -55, -136, 19681,
  298, 541, 0, -73988,
};

static const int cog_ycbcr_to_rgb_matrix_8bit_sdtv[] = {
  298, 0, 409, -57068,
  298, -100, -208, 34707,
  298, 516, 0, -70870,
};

static const gint cog_rgb_to_ycbcr_matrix_8bit_hdtv[] = {
  47, 157, 16, 4096,
  -26, -87, 112, 32768,
  112, -102, -10, 32768,
};

static const gint cog_rgb_to_ycbcr_matrix_8bit_sdtv[] = {
  66, 129, 25, 4096,
  -38, -74, 112, 32768,
  112, -94, -18, 32768,
};

static const gint cog_ycbcr_sdtv_to_ycbcr_hdtv_matrix_8bit[] = {
  256, -30, -53, 10600,
  0, 261, 29, -4367,
  0, 19, 262, -3289,
};

static const gint cog_ycbcr_hdtv_to_ycbcr_sdtv_matrix_8bit[] = {
  256, 25, 49, -9536,
  0, 253, -28, 3958,
  0, -19, 252, 2918,
};

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/* Alpha signals and args */
enum
{
  /* FILL ME */
  LAST_SIGNAL
};

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#define DEFAULT_METHOD ALPHA_METHOD_SET
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#define DEFAULT_ALPHA 1.0
#define DEFAULT_TARGET_R 0
#define DEFAULT_TARGET_G 255
#define DEFAULT_TARGET_B 0
#define DEFAULT_ANGLE 20.0
#define DEFAULT_NOISE_LEVEL 2.0
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#define DEFAULT_BLACK_SENSITIVITY 100
#define DEFAULT_WHITE_SENSITIVITY 100
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#define DEFAULT_PREFER_PASSTHROUGH FALSE
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enum
{
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  PROP_0,
  PROP_METHOD,
  PROP_ALPHA,
  PROP_TARGET_R,
  PROP_TARGET_G,
  PROP_TARGET_B,
  PROP_ANGLE,
  PROP_NOISE_LEVEL,
  PROP_BLACK_SENSITIVITY,
  PROP_WHITE_SENSITIVITY,
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  PROP_PREFER_PASSTHROUGH,
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  PROP_LAST
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};

static GstStaticPadTemplate gst_alpha_src_template =
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    GST_STATIC_PAD_TEMPLATE ("src",
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    GST_PAD_SRC,
    GST_PAD_ALWAYS,
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    GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("AYUV") ";"
        GST_VIDEO_CAPS_ARGB ";" GST_VIDEO_CAPS_BGRA ";"
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        GST_VIDEO_CAPS_ABGR ";" GST_VIDEO_CAPS_RGBA
        ";" GST_VIDEO_CAPS_YUV ("Y444")
        ";" GST_VIDEO_CAPS_xRGB ";" GST_VIDEO_CAPS_BGRx ";" GST_VIDEO_CAPS_xBGR
        ";" GST_VIDEO_CAPS_RGBx ";" GST_VIDEO_CAPS_RGB ";" GST_VIDEO_CAPS_BGR
        ";" GST_VIDEO_CAPS_YUV ("Y42B") ";" GST_VIDEO_CAPS_YUV ("YUY2")
        ";" GST_VIDEO_CAPS_YUV ("YVYU") ";" GST_VIDEO_CAPS_YUV ("UYVY")
        ";" GST_VIDEO_CAPS_YUV ("I420") ";" GST_VIDEO_CAPS_YUV ("YV12")
        ";" GST_VIDEO_CAPS_YUV ("Y41B"))
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    );

static GstStaticPadTemplate gst_alpha_sink_template =
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    GST_STATIC_PAD_TEMPLATE ("sink",
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    GST_PAD_SINK,
    GST_PAD_ALWAYS,
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    GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("AYUV")
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        ";" GST_VIDEO_CAPS_ARGB ";" GST_VIDEO_CAPS_BGRA ";" GST_VIDEO_CAPS_ABGR
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        ";" GST_VIDEO_CAPS_RGBA ";" GST_VIDEO_CAPS_YUV ("Y444")
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        ";" GST_VIDEO_CAPS_xRGB ";" GST_VIDEO_CAPS_BGRx ";" GST_VIDEO_CAPS_xBGR
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        ";" GST_VIDEO_CAPS_RGBx ";" GST_VIDEO_CAPS_RGB ";" GST_VIDEO_CAPS_BGR
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        ";" GST_VIDEO_CAPS_YUV ("Y42B") ";" GST_VIDEO_CAPS_YUV ("YUY2")
        ";" GST_VIDEO_CAPS_YUV ("YVYU") ";" GST_VIDEO_CAPS_YUV ("UYVY")
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        ";" GST_VIDEO_CAPS_YUV ("I420") ";" GST_VIDEO_CAPS_YUV ("YV12")
        ";" GST_VIDEO_CAPS_YUV ("Y41B")
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    )
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    );

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static GstStaticCaps gst_alpha_alpha_caps =
    GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("AYUV")
    ";" GST_VIDEO_CAPS_ARGB ";" GST_VIDEO_CAPS_BGRA ";" GST_VIDEO_CAPS_ABGR ";"
    GST_VIDEO_CAPS_RGBA);

#define GST_ALPHA_LOCK(alpha) G_STMT_START { \
  GST_LOG_OBJECT (alpha, "Locking alpha from thread %p", g_thread_self ()); \
  g_static_mutex_lock (&alpha->lock); \
  GST_LOG_OBJECT (alpha, "Locked alpha from thread %p", g_thread_self ()); \
} G_STMT_END

#define GST_ALPHA_UNLOCK(alpha) G_STMT_START { \
  GST_LOG_OBJECT (alpha, "Unlocking alpha from thread %p", g_thread_self ()); \
  g_static_mutex_unlock (&alpha->lock); \
} G_STMT_END

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static gboolean gst_alpha_start (GstBaseTransform * trans);
static gboolean gst_alpha_get_unit_size (GstBaseTransform * btrans,
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    GstCaps * caps, gsize * size);
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static GstCaps *gst_alpha_transform_caps (GstBaseTransform * btrans,
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    GstPadDirection direction, GstCaps * caps, GstCaps * filter);
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static gboolean gst_alpha_set_caps (GstBaseTransform * btrans,
    GstCaps * incaps, GstCaps * outcaps);
static GstFlowReturn gst_alpha_transform (GstBaseTransform * btrans,
    GstBuffer * in, GstBuffer * out);
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static void gst_alpha_before_transform (GstBaseTransform * btrans,
    GstBuffer * buf);
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static void gst_alpha_init_params (GstAlpha * alpha);
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static gboolean gst_alpha_set_process_function (GstAlpha * alpha);
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static void gst_alpha_set_property (GObject * object, guint prop_id,
    const GValue * value, GParamSpec * pspec);
static void gst_alpha_get_property (GObject * object, guint prop_id,
    GValue * value, GParamSpec * pspec);
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static void gst_alpha_finalize (GObject * object);
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#define gst_alpha_parent_class parent_class
G_DEFINE_TYPE (GstAlpha, gst_alpha, GST_TYPE_VIDEO_FILTER);
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#define GST_TYPE_ALPHA_METHOD (gst_alpha_method_get_type())
static GType
gst_alpha_method_get_type (void)
{
  static GType alpha_method_type = 0;
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  static const GEnumValue alpha_method[] = {
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    {ALPHA_METHOD_SET, "Set/adjust alpha channel", "set"},
    {ALPHA_METHOD_GREEN, "Chroma Key green", "green"},
    {ALPHA_METHOD_BLUE, "Chroma Key blue", "blue"},
    {ALPHA_METHOD_CUSTOM, "Chroma Key on target_r/g/b", "custom"},
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    {0, NULL, NULL},
  };

  if (!alpha_method_type) {
    alpha_method_type = g_enum_register_static ("GstAlphaMethod", alpha_method);
  }
  return alpha_method_type;
}

static void
gst_alpha_class_init (GstAlphaClass * klass)
{
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  GObjectClass *gobject_class = (GObjectClass *) klass;
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  GstElementClass *gstelement_class = (GstElementClass *) klass;
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  GstBaseTransformClass *btrans_class = (GstBaseTransformClass *) klass;
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  GST_DEBUG_CATEGORY_INIT (gst_alpha_debug, "alpha", 0,
      "alpha - Element for adding alpha channel to streams");

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  gobject_class->set_property = gst_alpha_set_property;
  gobject_class->get_property = gst_alpha_get_property;
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  gobject_class->finalize = gst_alpha_finalize;
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  g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_METHOD,
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      g_param_spec_enum ("method", "Method",
          "How the alpha channels should be created", GST_TYPE_ALPHA_METHOD,
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          DEFAULT_METHOD, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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  g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_ALPHA,
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      g_param_spec_double ("alpha", "Alpha", "The value for the alpha channel",
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          0.0, 1.0, DEFAULT_ALPHA,
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          G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
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  g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TARGET_R,
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      g_param_spec_uint ("target-r", "Target Red", "The Red target", 0, 255,
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          DEFAULT_TARGET_R,
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          G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
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  g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TARGET_G,
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      g_param_spec_uint ("target-g", "Target Green", "The Green target", 0, 255,
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          DEFAULT_TARGET_G,
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          G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
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  g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TARGET_B,
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      g_param_spec_uint ("target-b", "Target Blue", "The Blue target", 0, 255,
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          DEFAULT_TARGET_B,
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          G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
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  g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_ANGLE,
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      g_param_spec_float ("angle", "Angle", "Size of the colorcube to change",
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          0.0, 90.0, DEFAULT_ANGLE,
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          G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
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  g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_NOISE_LEVEL,
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      g_param_spec_float ("noise-level", "Noise Level", "Size of noise radius",
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          0.0, 64.0, DEFAULT_NOISE_LEVEL,
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          G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
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  g_object_class_install_property (G_OBJECT_CLASS (klass),
      PROP_BLACK_SENSITIVITY, g_param_spec_uint ("black-sensitivity",
          "Black Sensitivity", "Sensitivity to dark colors", 0, 128,
          DEFAULT_BLACK_SENSITIVITY,
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          G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
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  g_object_class_install_property (G_OBJECT_CLASS (klass),
      PROP_WHITE_SENSITIVITY, g_param_spec_uint ("white-sensitivity",
          "Sensitivity", "Sensitivity to bright colors", 0, 128,
          DEFAULT_WHITE_SENSITIVITY,
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          G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
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  g_object_class_install_property (G_OBJECT_CLASS (klass),
      PROP_PREFER_PASSTHROUGH, g_param_spec_boolean ("prefer-passthrough",
          "Prefer Passthrough",
          "Don't do any processing for alpha=1.0 if possible",
          DEFAULT_PREFER_PASSTHROUGH,
          G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
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  gst_element_class_set_details_simple (gstelement_class, "Alpha filter",
      "Filter/Effect/Video",
      "Adds an alpha channel to video - uniform or via chroma-keying",
      "Wim Taymans <wim.taymans@gmail.com>\n"
      "Edward Hervey <edward.hervey@collabora.co.uk>\n"
      "Jan Schmidt <thaytan@noraisin.net>");

  gst_element_class_add_pad_template (gstelement_class,
      gst_static_pad_template_get (&gst_alpha_sink_template));
  gst_element_class_add_pad_template (gstelement_class,
      gst_static_pad_template_get (&gst_alpha_src_template));

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  btrans_class->start = GST_DEBUG_FUNCPTR (gst_alpha_start);
  btrans_class->transform = GST_DEBUG_FUNCPTR (gst_alpha_transform);
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  btrans_class->before_transform =
      GST_DEBUG_FUNCPTR (gst_alpha_before_transform);
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  btrans_class->get_unit_size = GST_DEBUG_FUNCPTR (gst_alpha_get_unit_size);
  btrans_class->transform_caps = GST_DEBUG_FUNCPTR (gst_alpha_transform_caps);
  btrans_class->set_caps = GST_DEBUG_FUNCPTR (gst_alpha_set_caps);
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}

static void
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gst_alpha_init (GstAlpha * alpha)
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{
  alpha->alpha = DEFAULT_ALPHA;
  alpha->method = DEFAULT_METHOD;
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  alpha->target_r = DEFAULT_TARGET_R;
  alpha->target_g = DEFAULT_TARGET_G;
  alpha->target_b = DEFAULT_TARGET_B;
  alpha->angle = DEFAULT_ANGLE;
  alpha->noise_level = DEFAULT_NOISE_LEVEL;
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  alpha->black_sensitivity = DEFAULT_BLACK_SENSITIVITY;
  alpha->white_sensitivity = DEFAULT_WHITE_SENSITIVITY;
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  g_static_mutex_init (&alpha->lock);
}

static void
gst_alpha_finalize (GObject * object)
{
  GstAlpha *alpha = GST_ALPHA (object);

  g_static_mutex_free (&alpha->lock);

  G_OBJECT_CLASS (parent_class)->finalize (object);
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}

static void
gst_alpha_set_property (GObject * object, guint prop_id,
    const GValue * value, GParamSpec * pspec)
{
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  GstAlpha *alpha = GST_ALPHA (object);
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  gboolean reconfigure = FALSE;
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  GST_ALPHA_LOCK (alpha);
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  switch (prop_id) {
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    case PROP_METHOD:{
      gint method = g_value_get_enum (value);

      reconfigure = (method != alpha->method) && (method == ALPHA_METHOD_SET
          || alpha->method == ALPHA_METHOD_SET) && (alpha->alpha == 1.0)
          && (alpha->prefer_passthrough);
      alpha->method = method;

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      switch (alpha->method) {
        case ALPHA_METHOD_GREEN:
          alpha->target_r = 0;
          alpha->target_g = 255;
          alpha->target_b = 0;
          break;
        case ALPHA_METHOD_BLUE:
          alpha->target_r = 0;
          alpha->target_g = 0;
          alpha->target_b = 255;
          break;
        default:
          break;
      }
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      gst_alpha_set_process_function (alpha);
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      gst_alpha_init_params (alpha);
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      break;
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    }
    case PROP_ALPHA:{
      gdouble a = g_value_get_double (value);

      reconfigure = (a != alpha->alpha) && (a == 1.0 || alpha->alpha == 1.0)
          && (alpha->method == ALPHA_METHOD_SET) && (alpha->prefer_passthrough);
      alpha->alpha = a;
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      break;
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    }
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    case PROP_TARGET_R:
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      alpha->target_r = g_value_get_uint (value);
      gst_alpha_init_params (alpha);
      break;
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    case PROP_TARGET_G:
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      alpha->target_g = g_value_get_uint (value);
      gst_alpha_init_params (alpha);
      break;
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    case PROP_TARGET_B:
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      alpha->target_b = g_value_get_uint (value);
      gst_alpha_init_params (alpha);
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      break;
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    case PROP_ANGLE:
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      alpha->angle = g_value_get_float (value);
      gst_alpha_init_params (alpha);
      break;
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    case PROP_NOISE_LEVEL:
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      alpha->noise_level = g_value_get_float (value);
      gst_alpha_init_params (alpha);
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      break;
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    case PROP_BLACK_SENSITIVITY:
      alpha->black_sensitivity = g_value_get_uint (value);
      break;
    case PROP_WHITE_SENSITIVITY:
      alpha->white_sensitivity = g_value_get_uint (value);
      break;
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    case PROP_PREFER_PASSTHROUGH:{
      gboolean prefer_passthrough = g_value_get_boolean (value);

      reconfigure = ((!!prefer_passthrough) != (!!alpha->prefer_passthrough))
          && (alpha->method == ALPHA_METHOD_SET) && (alpha->alpha == 1.0);
      alpha->prefer_passthrough = prefer_passthrough;
      break;
    }
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    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
      break;
  }
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  if (reconfigure)
    gst_base_transform_reconfigure (GST_BASE_TRANSFORM_CAST (alpha));

  GST_ALPHA_UNLOCK (alpha);
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}
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static void
gst_alpha_get_property (GObject * object, guint prop_id, GValue * value,
    GParamSpec * pspec)
{
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  GstAlpha *alpha = GST_ALPHA (object);
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  switch (prop_id) {
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    case PROP_METHOD:
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      g_value_set_enum (value, alpha->method);
      break;
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    case PROP_ALPHA:
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      g_value_set_double (value, alpha->alpha);
      break;
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    case PROP_TARGET_R:
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      g_value_set_uint (value, alpha->target_r);
      break;
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    case PROP_TARGET_G:
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      g_value_set_uint (value, alpha->target_g);
      break;
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    case PROP_TARGET_B:
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      g_value_set_uint (value, alpha->target_b);
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      break;
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    case PROP_ANGLE:
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      g_value_set_float (value, alpha->angle);
      break;
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    case PROP_NOISE_LEVEL:
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      g_value_set_float (value, alpha->noise_level);
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      break;
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    case PROP_BLACK_SENSITIVITY:
      g_value_set_uint (value, alpha->black_sensitivity);
      break;
    case PROP_WHITE_SENSITIVITY:
      g_value_set_uint (value, alpha->white_sensitivity);
      break;
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    case PROP_PREFER_PASSTHROUGH:
      g_value_set_boolean (value, alpha->prefer_passthrough);
      break;
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    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
      break;
  }
}

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static gboolean
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gst_alpha_get_unit_size (GstBaseTransform * btrans,
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    GstCaps * caps, gsize * size)
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{
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  GstVideoFormat format;
  gint width, height;

  if (!gst_video_format_parse_caps (caps, &format, &width, &height))
    return FALSE;

  *size = gst_video_format_get_size (format, width, height);

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  GST_DEBUG_OBJECT (btrans, "unit size = %d for format %d w %d height %d",
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      *size, format, width, height);

  return TRUE;
}

static GstCaps *
gst_alpha_transform_caps (GstBaseTransform * btrans,
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    GstPadDirection direction, GstCaps * caps, GstCaps * filter)
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{
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  GstAlpha *alpha = GST_ALPHA (btrans);
  GstCaps *ret, *tmp, *tmp2;
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  GstStructure *structure;
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  gint i;

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  tmp = gst_caps_new_empty ();
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  GST_ALPHA_LOCK (alpha);
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  for (i = 0; i < gst_caps_get_size (caps); i++) {
    structure = gst_structure_copy (gst_caps_get_structure (caps, i));

    gst_structure_remove_field (structure, "format");
    gst_structure_remove_field (structure, "endianness");
    gst_structure_remove_field (structure, "depth");
    gst_structure_remove_field (structure, "bpp");
    gst_structure_remove_field (structure, "red_mask");
    gst_structure_remove_field (structure, "green_mask");
    gst_structure_remove_field (structure, "blue_mask");
    gst_structure_remove_field (structure, "alpha_mask");
    gst_structure_remove_field (structure, "color-matrix");
    gst_structure_remove_field (structure, "chroma-site");

    gst_structure_set_name (structure, "video/x-raw-yuv");
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    gst_caps_append_structure (tmp, gst_structure_copy (structure));
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    gst_structure_set_name (structure, "video/x-raw-rgb");
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    gst_caps_append_structure (tmp, structure);
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  }

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  if (direction == GST_PAD_SINK) {
    tmp2 = gst_static_caps_get (&gst_alpha_alpha_caps);
    ret = gst_caps_intersect (tmp, tmp2);
    gst_caps_unref (tmp);
    gst_caps_unref (tmp2);
    tmp = ret;
    ret = NULL;

    if (alpha->prefer_passthrough && alpha->method == ALPHA_METHOD_SET
        && alpha->alpha == 1.0) {
      ret = gst_caps_copy (caps);
      gst_caps_append (ret, tmp);
      tmp = NULL;
    } else {
      ret = tmp;
      tmp = NULL;
    }
  } else {
    ret = tmp;
    tmp = NULL;
  }

  GST_DEBUG_OBJECT (alpha,
      "Transformed %" GST_PTR_FORMAT " -> %" GST_PTR_FORMAT, caps, ret);

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  if (filter) {
    GstCaps *intersection;

    GST_DEBUG_OBJECT (alpha, "Using filter caps %" GST_PTR_FORMAT, filter);
    intersection =
        gst_caps_intersect_full (filter, ret, GST_CAPS_INTERSECT_FIRST);
    gst_caps_unref (ret);
    ret = intersection;
    GST_DEBUG_OBJECT (alpha, "Intersection %" GST_PTR_FORMAT, ret);
  }


542
  GST_ALPHA_UNLOCK (alpha);
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  return ret;
}

static gboolean
gst_alpha_set_caps (GstBaseTransform * btrans,
    GstCaps * incaps, GstCaps * outcaps)
{
  GstAlpha *alpha = GST_ALPHA (btrans);
552
  const gchar *matrix;
553
  gboolean passthrough;
554

555
  GST_ALPHA_LOCK (alpha);
556

557 558
  if (!gst_video_format_parse_caps (incaps, &alpha->in_format,
          &alpha->width, &alpha->height) ||
559
      !gst_video_format_parse_caps (outcaps, &alpha->out_format,
560
          &alpha->width, &alpha->height)) {
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    GST_WARNING_OBJECT (alpha,
        "Failed to parse caps %" GST_PTR_FORMAT " -> %" GST_PTR_FORMAT, incaps,
        outcaps);
    GST_ALPHA_UNLOCK (alpha);
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    return FALSE;
  }

  matrix = gst_video_parse_caps_color_matrix (incaps);
  alpha->in_sdtv = matrix ? g_str_equal (matrix, "sdtv") : TRUE;

  matrix = gst_video_parse_caps_color_matrix (outcaps);
  alpha->out_sdtv = matrix ? g_str_equal (matrix, "sdtv") : TRUE;

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  passthrough = alpha->prefer_passthrough &&
      alpha->in_format == alpha->out_format && alpha->in_sdtv == alpha->out_sdtv
      && alpha->method == ALPHA_METHOD_SET && alpha->alpha == 1.0;

  GST_DEBUG_OBJECT (alpha,
      "Setting caps %" GST_PTR_FORMAT " -> %" GST_PTR_FORMAT
      " (passthrough: %d)", incaps, outcaps, passthrough);
  gst_base_transform_set_passthrough (btrans, passthrough);

  if (!gst_alpha_set_process_function (alpha) && !passthrough) {
    GST_WARNING_OBJECT (alpha,
        "No processing function for this caps and no passthrough mode");
    GST_ALPHA_UNLOCK (alpha);
    return FALSE;
  }

590
  gst_alpha_init_params (alpha);
591 592

  GST_ALPHA_UNLOCK (alpha);
593

594
  return TRUE;
595 596
}

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/* based on http://www.cs.utah.edu/~michael/chroma/
 */
static inline gint
600
chroma_keying_yuv (gint a, gint * y, gint * u,
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    gint * v, gint cr, gint cb, gint smin, gint smax, guint8 accept_angle_tg,
    guint8 accept_angle_ctg, guint8 one_over_kc, guint8 kfgy_scale, gint8 kg,
603
    guint noise_level2)
604 605 606 607 608 609
{
  gint tmp, tmp1;
  gint x1, y1;
  gint x, z;
  gint b_alpha;

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  /* too dark or too bright, keep alpha */
  if (*y < smin || *y > smax)
    return a;
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  /* Convert foreground to XZ coords where X direction is defined by
     the key color */
  tmp = ((*u) * cb + (*v) * cr) >> 7;
  x = CLAMP (tmp, -128, 127);
  tmp = ((*v) * cb - (*u) * cr) >> 7;
  z = CLAMP (tmp, -128, 127);

  /* WARNING: accept angle should never be set greater than "somewhat less
     than 90 degrees" to avoid dealing with negative/infinite tg. In reality,
     80 degrees should be enough if foreground is reasonable. If this seems
     to be a problem, go to alternative ways of checking point position
     (scalar product or line equations). This angle should not be too small
     either to avoid infinite ctg (used to suppress foreground without use of
     division) */

  tmp = (x * accept_angle_tg) >> 4;
  tmp = MIN (tmp, 127);

  if (abs (z) > tmp) {
    /* keep foreground Kfg = 0 */
    return a;
  }
  /* Compute Kfg (implicitly) and Kbg, suppress foreground in XZ coord
     according to Kfg */
  tmp = (z * accept_angle_ctg) >> 4;
  tmp = CLAMP (tmp, -128, 127);
  x1 = abs (tmp);
  y1 = z;

  tmp1 = x - x1;
  tmp1 = MAX (tmp1, 0);
  b_alpha = (tmp1 * one_over_kc) / 2;
  b_alpha = 255 - CLAMP (b_alpha, 0, 255);
  b_alpha = (a * b_alpha) >> 8;

  tmp = (tmp1 * kfgy_scale) >> 4;
  tmp1 = MIN (tmp, 255);

652
  *y = (*y < tmp1) ? 0 : *y - tmp1;
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  /* Convert suppressed foreground back to CbCr */
  tmp = (x1 * cb - y1 * cr) >> 7;
  *u = CLAMP (tmp, -128, 127);

  tmp = (x1 * cr + y1 * cb) >> 7;
  *v = CLAMP (tmp, -128, 127);

  /* Deal with noise. For now, a circle around the key color with
     radius of noise_level treated as exact key color. Introduces
     sharp transitions.
   */
  tmp = z * z + (x - kg) * (x - kg);
  tmp = MIN (tmp, 0xffff);

668
  if (tmp < noise_level2)
669 670 671 672 673
    b_alpha = 0;

  return b_alpha;
}

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#define APPLY_MATRIX(m,o,v1,v2,v3) ((m[o*4] * v1 + m[o*4+1] * v2 + m[o*4+2] * v3 + m[o*4+3]) >> 8)

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static void
gst_alpha_set_argb_ayuv (const guint8 * src, guint8 * dest, gint width,
    gint height, GstAlpha * alpha)
{
  gint s_alpha = CLAMP ((gint) (alpha->alpha * 256), 0, 256);
  gint i, j;
  gint matrix[12];
  gint y, u, v;
  gint o[4];

  o[0] =
      gst_video_format_get_component_offset (alpha->in_format, 3, width,
      height);
  o[1] =
      gst_video_format_get_component_offset (alpha->in_format, 0, width,
      height);
  o[2] =
      gst_video_format_get_component_offset (alpha->in_format, 1, width,
      height);
  o[3] =
      gst_video_format_get_component_offset (alpha->in_format, 2, width,
      height);

  memcpy (matrix,
      alpha->out_sdtv ? cog_rgb_to_ycbcr_matrix_8bit_sdtv :
      cog_rgb_to_ycbcr_matrix_8bit_hdtv, 12 * sizeof (gint));

  for (i = 0; i < height; i++) {
    for (j = 0; j < width; j++) {
      dest[0] = (src[o[0]] * s_alpha) >> 8;

      y = APPLY_MATRIX (matrix, 0, src[o[1]], src[o[2]], src[o[3]]);
      u = APPLY_MATRIX (matrix, 1, src[o[1]], src[o[2]], src[o[3]]);
      v = APPLY_MATRIX (matrix, 2, src[o[1]], src[o[2]], src[o[3]]);

      dest[1] = y;
      dest[2] = u;
      dest[3] = v;

      dest += 4;
      src += 4;
    }
  }
}

static void
gst_alpha_chroma_key_argb_ayuv (const guint8 * src, guint8 * dest, gint width,
    gint height, GstAlpha * alpha)
{
  gint i, j;
  gint a, y, u, v;
  gint r, g, b;
  gint smin, smax;
  gint pa = CLAMP ((gint) (alpha->alpha * 256), 0, 256);
  gint8 cb = alpha->cb, cr = alpha->cr;
  gint8 kg = alpha->kg;
  guint8 accept_angle_tg = alpha->accept_angle_tg;
  guint8 accept_angle_ctg = alpha->accept_angle_ctg;
  guint8 one_over_kc = alpha->one_over_kc;
  guint8 kfgy_scale = alpha->kfgy_scale;
  guint noise_level2 = alpha->noise_level2;
  gint matrix[12];
  gint o[4];

  o[0] =
      gst_video_format_get_component_offset (alpha->in_format, 3, width,
      height);
  o[1] =
      gst_video_format_get_component_offset (alpha->in_format, 0, width,
      height);
  o[2] =
      gst_video_format_get_component_offset (alpha->in_format, 1, width,
      height);
  o[3] =
      gst_video_format_get_component_offset (alpha->in_format, 2, width,
      height);

  smin = 128 - alpha->black_sensitivity;
  smax = 128 + alpha->white_sensitivity;

  memcpy (matrix,
      alpha->out_sdtv ? cog_rgb_to_ycbcr_matrix_8bit_sdtv :
      cog_rgb_to_ycbcr_matrix_8bit_hdtv, 12 * sizeof (gint));

  for (i = 0; i < height; i++) {
    for (j = 0; j < width; j++) {
      a = (src[o[0]] * pa) >> 8;
      r = src[o[1]];
      g = src[o[2]];
      b = src[o[3]];

      y = APPLY_MATRIX (matrix, 0, r, g, b);
      u = APPLY_MATRIX (matrix, 1, r, g, b) - 128;
      v = APPLY_MATRIX (matrix, 2, r, g, b) - 128;

      a = chroma_keying_yuv (a, &y, &u, &v, cr, cb,
          smin, smax, accept_angle_tg, accept_angle_ctg,
          one_over_kc, kfgy_scale, kg, noise_level2);

      u += 128;
      v += 128;

      dest[0] = a;
      dest[1] = y;
      dest[2] = u;
      dest[3] = v;

      src += 4;
      dest += 4;
    }
  }
}

static void
gst_alpha_set_argb_argb (const guint8 * src, guint8 * dest, gint width,
    gint height, GstAlpha * alpha)
{
  gint s_alpha = CLAMP ((gint) (alpha->alpha * 256), 0, 256);
  gint i, j;
  gint p[4], o[4];

  p[0] =
      gst_video_format_get_component_offset (alpha->out_format, 3, width,
      height);
  p[1] =
      gst_video_format_get_component_offset (alpha->out_format, 0, width,
      height);
  p[2] =
      gst_video_format_get_component_offset (alpha->out_format, 1, width,
      height);
  p[3] =
      gst_video_format_get_component_offset (alpha->out_format, 2, width,
      height);

  o[0] =
      gst_video_format_get_component_offset (alpha->in_format, 3, width,
      height);
  o[1] =
      gst_video_format_get_component_offset (alpha->in_format, 0, width,
      height);
  o[2] =
      gst_video_format_get_component_offset (alpha->in_format, 1, width,
      height);
  o[3] =
      gst_video_format_get_component_offset (alpha->in_format, 2, width,
      height);

  for (i = 0; i < height; i++) {
    for (j = 0; j < width; j++) {
      dest[p[0]] = (src[o[0]] * s_alpha) >> 8;

      dest[p[1]] = src[o[1]];
      dest[p[2]] = src[o[2]];
      dest[p[3]] = src[o[3]];

      dest += 4;
      src += 4;
    }
  }
835
}
836

837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918
static void
gst_alpha_chroma_key_argb_argb (const guint8 * src, guint8 * dest, gint width,
    gint height, GstAlpha * alpha)
{
  gint i, j;
  gint a, y, u, v;
  gint r, g, b;
  gint smin, smax;
  gint pa = CLAMP ((gint) (alpha->alpha * 256), 0, 256);
  gint8 cb = alpha->cb, cr = alpha->cr;
  gint8 kg = alpha->kg;
  guint8 accept_angle_tg = alpha->accept_angle_tg;
  guint8 accept_angle_ctg = alpha->accept_angle_ctg;
  guint8 one_over_kc = alpha->one_over_kc;
  guint8 kfgy_scale = alpha->kfgy_scale;
  guint noise_level2 = alpha->noise_level2;
  gint matrix[12], matrix2[12];
  gint p[4], o[4];

  p[0] =
      gst_video_format_get_component_offset (alpha->out_format, 3, width,
      height);
  p[1] =
      gst_video_format_get_component_offset (alpha->out_format, 0, width,
      height);
  p[2] =
      gst_video_format_get_component_offset (alpha->out_format, 1, width,
      height);
  p[3] =
      gst_video_format_get_component_offset (alpha->out_format, 2, width,
      height);

  o[0] =
      gst_video_format_get_component_offset (alpha->in_format, 3, width,
      height);
  o[1] =
      gst_video_format_get_component_offset (alpha->in_format, 0, width,
      height);
  o[2] =
      gst_video_format_get_component_offset (alpha->in_format, 1, width,
      height);
  o[3] =
      gst_video_format_get_component_offset (alpha->in_format, 2, width,
      height);

  smin = 128 - alpha->black_sensitivity;
  smax = 128 + alpha->white_sensitivity;

  memcpy (matrix, cog_rgb_to_ycbcr_matrix_8bit_sdtv, 12 * sizeof (gint));
  memcpy (matrix2, cog_ycbcr_to_rgb_matrix_8bit_sdtv, 12 * sizeof (gint));

  for (i = 0; i < height; i++) {
    for (j = 0; j < width; j++) {
      a = (src[o[0]] * pa) >> 8;
      r = src[o[1]];
      g = src[o[2]];
      b = src[o[3]];

      y = APPLY_MATRIX (matrix, 0, r, g, b);
      u = APPLY_MATRIX (matrix, 1, r, g, b) - 128;
      v = APPLY_MATRIX (matrix, 2, r, g, b) - 128;

      a = chroma_keying_yuv (a, &y, &u, &v, cr, cb,
          smin, smax, accept_angle_tg, accept_angle_ctg,
          one_over_kc, kfgy_scale, kg, noise_level2);

      u += 128;
      v += 128;

      r = APPLY_MATRIX (matrix2, 0, y, u, v);
      g = APPLY_MATRIX (matrix2, 1, y, u, v);
      b = APPLY_MATRIX (matrix2, 2, y, u, v);

      dest[p[0]] = a;
      dest[p[1]] = CLAMP (r, 0, 255);
      dest[p[2]] = CLAMP (g, 0, 255);
      dest[p[3]] = CLAMP (b, 0, 255);

      src += 4;
      dest += 4;
    }
  }
919
}
920

921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963
static void
gst_alpha_set_ayuv_argb (const guint8 * src, guint8 * dest, gint width,
    gint height, GstAlpha * alpha)
{
  gint s_alpha = CLAMP ((gint) (alpha->alpha * 256), 0, 256);
  gint y, x;
  gint matrix[12];
  gint r, g, b;
  gint p[4];

  p[0] =
      gst_video_format_get_component_offset (alpha->out_format, 3, width,
      height);
  p[1] =
      gst_video_format_get_component_offset (alpha->out_format, 0, width,
      height);
  p[2] =
      gst_video_format_get_component_offset (alpha->out_format, 1, width,
      height);
  p[3] =
      gst_video_format_get_component_offset (alpha->out_format, 2, width,
      height);

  memcpy (matrix,
      alpha->in_sdtv ? cog_ycbcr_to_rgb_matrix_8bit_sdtv :
      cog_ycbcr_to_rgb_matrix_8bit_hdtv, 12 * sizeof (gint));

  for (y = 0; y < height; y++) {
    for (x = 0; x < width; x++) {
      dest[p[0]] = (src[0] * s_alpha) >> 8;

      r = APPLY_MATRIX (matrix, 0, src[1], src[2], src[3]);
      g = APPLY_MATRIX (matrix, 1, src[1], src[2], src[3]);
      b = APPLY_MATRIX (matrix, 2, src[1], src[2], src[3]);

      dest[p[1]] = CLAMP (r, 0, 255);
      dest[p[2]] = CLAMP (g, 0, 255);
      dest[p[3]] = CLAMP (b, 0, 255);

      dest += 4;
      src += 4;
    }
  }
964 965
}

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static void
gst_alpha_chroma_key_ayuv_argb (const guint8 * src, guint8 * dest, gint width,
    gint height, GstAlpha * alpha)
{
  gint i, j;
  gint a, y, u, v;
  gint r, g, b;
  gint smin, smax;
  gint pa = CLAMP ((gint) (alpha->alpha * 256), 0, 256);
  gint8 cb = alpha->cb, cr = alpha->cr;
  gint8 kg = alpha->kg;
  guint8 accept_angle_tg = alpha->accept_angle_tg;
  guint8 accept_angle_ctg = alpha->accept_angle_ctg;
  guint8 one_over_kc = alpha->one_over_kc;
  guint8 kfgy_scale = alpha->kfgy_scale;
  guint noise_level2 = alpha->noise_level2;
  gint matrix[12];
  gint p[4];

  p[0] =
      gst_video_format_get_component_offset (alpha->out_format, 3, width,
      height);
  p[1] =
      gst_video_format_get_component_offset (alpha->out_format, 0, width,
      height);
  p[2] =
      gst_video_format_get_component_offset (alpha->out_format, 1, width,
      height);
  p[3] =
      gst_video_format_get_component_offset (alpha->out_format, 2, width,
      height);

  smin = 128 - alpha->black_sensitivity;
  smax = 128 + alpha->white_sensitivity;

  memcpy (matrix,
      alpha->in_sdtv ? cog_ycbcr_to_rgb_matrix_8bit_sdtv :
      cog_ycbcr_to_rgb_matrix_8bit_hdtv, 12 * sizeof (gint));

  for (i = 0; i < height; i++) {
    for (j = 0; j < width; j++) {
      a = (src[0] * pa) >> 8;
      y = src[1];
      u = src[2] - 128;
      v = src[3] - 128;

      a = chroma_keying_yuv (a, &y, &u, &v, cr, cb,
          smin, smax, accept_angle_tg, accept_angle_ctg,
          one_over_kc, kfgy_scale, kg, noise_level2);

      u += 128;
      v += 128;

      r = APPLY_MATRIX (matrix, 0, y, u, v);
      g = APPLY_MATRIX (matrix, 1, y, u, v);
      b = APPLY_MATRIX (matrix, 2, y, u, v);

      dest[p[0]] = a;
      dest[p[1]] = CLAMP (r, 0, 255);
      dest[p[2]] = CLAMP (g, 0, 255);
      dest[p[3]] = CLAMP (b, 0, 255);

      src += 4;
      dest += 4;
    }
  }
}
1033

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static void
gst_alpha_set_ayuv_ayuv (const guint8 * src, guint8 * dest, gint width,
    gint height, GstAlpha * alpha)
{
  gint s_alpha = CLAMP ((gint) (alpha->alpha * 256), 0, 256);
  gint y, x;

  if (alpha->in_sdtv == alpha->out_sdtv) {
    for (y = 0; y < height; y++) {
      for (x = 0; x < width; x++) {
        dest[0] = (src[0] * s_alpha) >> 8;
        dest[1] = src[1];
        dest[2] = src[2];
        dest[3] = src[3];

        dest += 4;
        src += 4;
      }
    }
  } else {
    gint matrix[12];

    memcpy (matrix,
        alpha->out_sdtv ? cog_ycbcr_hdtv_to_ycbcr_sdtv_matrix_8bit :
        cog_ycbcr_sdtv_to_ycbcr_hdtv_matrix_8bit, 12 * sizeof (gint));

    for (y = 0; y < height; y++) {
      for (x = 0; x < width; x++) {
        dest[0] = (src[0] * s_alpha) >> 8;
        dest[1] = APPLY_MATRIX (matrix, 0, src[1], src[2], src[3]);
        dest[2] = APPLY_MATRIX (matrix, 1, src[1], src[2], src[3]);
        dest[3] = APPLY_MATRIX (matrix, 2, src[1], src[2], src[3]);

        dest += 4;
        src += 4;
      }
    }
  }
}

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static void
gst_alpha_chroma_key_ayuv_ayuv (const guint8 * src, guint8 * dest,
    gint width, gint height, GstAlpha * alpha)
{
  gint i, j;
  gint a, y, u, v;
  gint smin, smax;
  gint pa = CLAMP ((gint) (alpha->alpha * 256), 0, 256);
  gint8 cb = alpha->cb, cr = alpha->cr;
  gint8 kg = alpha->kg;
  guint8 accept_angle_tg = alpha->accept_angle_tg;
  guint8 accept_angle_ctg = alpha->accept_angle_ctg;
  guint8 one_over_kc = alpha->one_over_kc;
  guint8 kfgy_scale = alpha->kfgy_scale;
  guint noise_level2 = alpha->noise_level2;

  smin = 128 - alpha->black_sensitivity;
  smax = 128 + alpha->white_sensitivity;

  if (alpha->in_sdtv == alpha->out_sdtv) {
    for (i = 0; i < height; i++) {
      for (j = 0; j < width; j++) {
        a = (src[0] * pa) >> 8;
        y = src[1];
        u = src[2] - 128;
        v = src[3] - 128;

1101
        a = chroma_keying_yuv (a, &y, &u, &v, cr, cb,
1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130
            smin, smax, accept_angle_tg, accept_angle_ctg,
            one_over_kc, kfgy_scale, kg, noise_level2);

        u += 128;
        v += 128;

        dest[0] = a;
        dest[1] = y;
        dest[2] = u;
        dest[3] = v;

        src += 4;
        dest += 4;
      }
    }
  } else {
    gint matrix[12];

    memcpy (matrix,
        alpha->out_sdtv ? cog_ycbcr_hdtv_to_ycbcr_sdtv_matrix_8bit :
        cog_ycbcr_sdtv_to_ycbcr_hdtv_matrix_8bit, 12 * sizeof (gint));

    for (i = 0; i < height; i++) {
      for (j = 0; j < width; j++) {
        a = (src[0] * pa) >> 8;
        y = APPLY_MATRIX (matrix, 0, src[1], src[2], src[3]);
        u = APPLY_MATRIX (matrix, 1, src[1], src[2], src[3]) - 128;
        v = APPLY_MATRIX (matrix, 2, src[1], src[2], src[3]) - 128;

1131
        a = chroma_keying_yuv (a, &y, &u, &v, cr, cb,
1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149
            smin, smax, accept_angle_tg, accept_angle_ctg,
            one_over_kc, kfgy_scale, kg, noise_level2);

        u += 128;
        v += 128;

        dest[0] = a;
        dest[1] = y;
        dest[2] = u;
        dest[3] = v;

        src += 4;
        dest += 4;
      }
    }
  }
}

1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192
static void
gst_alpha_set_rgb_ayuv (const guint8 * src, guint8 * dest, gint width,
    gint height, GstAlpha * alpha)
{
  gint s_alpha = CLAMP ((gint) (alpha->alpha * 255), 0, 255);
  gint i, j;
  gint matrix[12];
  gint y, u, v;
  gint o[3];
  gint bpp;

  bpp = gst_video_format_get_pixel_stride (alpha->in_format, 0);

  o[0] =
      gst_video_format_get_component_offset (alpha->in_format, 0, width,
      height);
  o[1] =
      gst_video_format_get_component_offset (alpha->in_format, 1, width,
      height);
  o[2] =
      gst_video_format_get_component_offset (alpha->in_format, 2, width,
      height);

  memcpy (matrix,
      alpha->out_sdtv ? cog_rgb_to_ycbcr_matrix_8bit_sdtv :
      cog_rgb_to_ycbcr_matrix_8bit_hdtv, 12 * sizeof (gint));

  for (i = 0; i < height; i++) {
    for (j = 0; j < width; j++) {
      dest[0] = s_alpha;

      y = APPLY_MATRIX (matrix, 0, src[o[0]], src[o[1]], src[o[2]]);
      u = APPLY_MATRIX (matrix, 1, src[o[0]], src[o[1]], src[o[2]]);
      v = APPLY_MATRIX (matrix, 2, src[o[0]], src[o[1]], src[o[2]]);

      dest[1] = y;
      dest[2] = u;
      dest[3] = v;

      dest += 4;
      src += bpp;
    }
  }
1193 1194
}

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static void
gst_alpha_chroma_key_rgb_ayuv (const guint8 * src, guint8 * dest, gint width,
    gint height, GstAlpha * alpha)
{
  gint i, j;
  gint a, y, u, v;
  gint r, g, b;
  gint smin, smax;
  gint pa = CLAMP ((gint) (alpha->alpha * 255), 0, 255);
  gint8 cb = alpha->cb, cr = alpha->cr;
  gint8 kg = alpha->kg;
  guint8 accept_angle_tg = alpha->accept_angle_tg;
  guint8 accept_angle_ctg = alpha->accept_angle_ctg;
  guint8 one_over_kc = alpha->one_over_kc;
  guint8 kfgy_scale = alpha->kfgy_scale;
  guint noise_level2 = alpha->noise_level2;
  gint matrix[12];
  gint o[3];
  gint bpp;

  bpp = gst_video_format_get_pixel_stride (alpha->in_format, 0);

  o[0] =
      gst_video_format_get_component_offset (alpha->in_format, 0, width,
      height);
  o[1] =
      gst_video_format_get_component_offset (alpha->in_format, 1, width,
      height);
  o[2] =
      gst_video_format_get_component_offset (alpha->in_format, 2, width,
      height);

  smin = 128 - alpha->black_sensitivity;
  smax = 128 + alpha->white_sensitivity;

  memcpy (matrix,
      alpha->out_sdtv ? cog_rgb_to_ycbcr_matrix_8bit_sdtv :
      cog_rgb_to_ycbcr_matrix_8bit_hdtv, 12 * sizeof (gint));

  for (i = 0; i < height; i++) {
    for (j = 0; j < width; j++) {
      a = pa;
      r = src[o[0]];
      g = src[o[1]];
      b = src[o[2]];

      y = APPLY_MATRIX (matrix, 0, r, g, b);
      u = APPLY_MATRIX (matrix, 1, r, g, b) - 128;
      v = APPLY_MATRIX (matrix, 2, r, g, b) - 128;

      a = chroma_keying_yuv (a, &y, &u, &v, cr, cb,
          smin, smax, accept_angle_tg, accept_angle_ctg,
          one_over_kc, kfgy_scale, kg, noise_level2);

      u += 128;
      v += 128;

      dest[0] = a;
      dest[1] = y;
      dest[2] = u;
      dest[3] = v;

      src += bpp;
      dest += 4;
    }
  }
1261 1262
}

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static void
gst_alpha_set_rgb_argb (const guint8 * src, guint8 * dest, gint width,
    gint height, GstAlpha * alpha)
{
  gint s_alpha = CLAMP ((gint) (alpha->alpha * 255), 0, 255);
  gint i, j;
  gint p[4], o[3];
  gint bpp;

  bpp = gst_video_format_get_pixel_stride (alpha->in_format, 0);

  o[0] =
      gst_video_format_get_component_offset (alpha->in_format, 0, width,
      height);
  o[1] =
      gst_video_format_get_component_offset (alpha->in_format, 1, width,
      height);
  o[2] =
      gst_video_format_get_component_offset (alpha->in_format, 2, width,
      height);

  p[0] =
      gst_video_format_get_component_offset (alpha->out_format, 3, width,
      height);
  p[1] =
      gst_video_format_get_component_offset (alpha->out_format, 0, width,
      height);
  p[2] =
      gst_video_format_get_component_offset (alpha->out_format, 1, width,
      height);
  p[3] =
      gst_video_format_get_component_offset (alpha->out_format, 2, width,
      height);

  for (i = 0; i < height; i++) {
    for (j = 0; j < width; j++) {
      dest[p[0]] = s_alpha;

      dest[p[1]] = src[o[0]];
      dest[p[2]] = src[o[1]];
      dest[p[3]] = src[o[2]];

      dest += 4;
      src += bpp;
    }
  }
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}

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static void
gst_alpha_chroma_key_rgb_argb (const guint8 * src, guint8 * dest, gint width,
    gint height, GstAlpha * alpha)
{
  gint i, j;
  gint a, y, u, v;
  gint r, g, b;
  gint smin, smax;
  gint pa = CLAMP ((gint) (alpha->alpha * 255), 0, 255);
  gint8 cb = alpha->cb, cr = alpha->cr;
  gint8 kg = alpha->kg;
  guint8 accept_angle_tg = alpha->accept_angle_tg;
  guint8 accept_angle_ctg = alpha->accept_angle_ctg;
  guint8 one_over_kc = alpha->one_over_kc;
  guint8 kfgy_scale = alpha->kfgy_scale;
  guint noise_level2 = alpha->noise_level2;
  gint matrix[12], matrix2[12];
  gint p[4], o[3];
  gint bpp;

  bpp = gst_video_format_get_pixel_stride (alpha->in_format, 0);

  o[0] =
      gst_video_format_get_component_offset (alpha->in_format, 0, width,
      height);
  o[1] =
      gst_video_format_get_component_offset (alpha->in_format, 1, width,
      height);
  o[2] =
      gst_video_format_get_component_offset (alpha->in_format, 2, width,
      height);

  p[0] =
      gst_video_format_get_component_offset (alpha->out_format, 3, width,
      height);
  p[1] =
      gst_video_format_get_component_offset (alpha->out_format, 0, width,
      height);
  p[2] =
      gst_video_format_get_component_offset (alpha->out_format, 1, width,
      height);
  p[3] =
      gst_video_format_get_component_offset (alpha->out_format, 2, width,
      height);

  smin = 128 - alpha->black_sensitivity;
  smax = 128 + alpha->white_sensitivity;

  memcpy (matrix, cog_rgb_to_ycbcr_matrix_8bit_sdtv, 12 * sizeof (gint));
  memcpy (matrix2, cog_ycbcr_to_rgb_matrix_8bit_sdtv, 12 * sizeof (gint));

  for (i = 0; i < height; i++) {
    for (j = 0; j < width; j++) {
      a = pa;
      r = src[o[0]];
      g = src[o[1]];
      b = src[o[2]];
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1369 1370 1371 1372 1373 1374 1375
      y = APPLY_MATRIX (matrix, 0, r, g, b);
      u = APPLY_MATRIX (matrix, 1, r, g, b) - 128;
      v = APPLY_MATRIX (matrix, 2, r, g, b) - 128;

      a = chroma_keying_yuv (a, &y, &u, &v, cr, cb,
          smin, smax, accept_angle_tg, accept_angle_ctg,
          one_over_kc, kfgy_scale, kg, noise_level2);
1376

1377 1378
      u += 128;
      v += 128;
1379

1380 1381 1382
      r = APPLY_MATRIX (matrix2, 0, y, u, v);
      g = APPLY_MATRIX (matrix2, 1, y, u, v);
      b = APPLY_MATRIX (matrix2, 2, y, u, v);
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1384 1385 1386 1387
      dest[p[0]] = a;
      dest[p[1]] = CLAMP (r, 0, 255);
      dest[p[2]] = CLAMP (g, 0, 255);
      dest[p[3]] = CLAMP (b, 0, 255);
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1389 1390 1391 1392 1393
      src += bpp;
      dest += 4;
    }
  }
}
1394

1395
static void
1396
gst_alpha_set_planar_yuv_ayuv (const guint8 * src, guint8 * dest, gint width,
1397