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gstreamer/ext/cog/gstcolorconvert.c
David Schleef bc25896579 cog: remove // comments
2009-09-19 14:13:25 -07:00

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/* GStreamer
* Copyright (C) 2008 David Schleef <ds@entropywave.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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <gst/base/gstbasetransform.h>
#include <gst/video/video.h>
#include <string.h>
#include <cog/cog.h>
#include <cog/cogvirtframe.h>
#include <math.h>
#include "gstcogutils.h"
#define GST_TYPE_COLORCONVERT \
(gst_colorconvert_get_type())
#define GST_COLORCONVERT(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_COLORCONVERT,GstColorconvert))
#define GST_COLORCONVERT_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_COLORCONVERT,GstColorconvertClass))
#define GST_IS_COLORCONVERT(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_COLORCONVERT))
#define GST_IS_COLORCONVERT_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_COLORCONVERT))
typedef struct _GstColorconvert GstColorconvert;
typedef struct _GstColorconvertClass GstColorconvertClass;
struct _GstColorconvert
{
GstBaseTransform base_transform;
gchar *location;
GstVideoFormat format;
int width;
int height;
};
struct _GstColorconvertClass
{
GstBaseTransformClass parent_class;
};
/* GstColorconvert signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
ARG_0,
};
GType gst_colorconvert_get_type (void);
static void gst_colorconvert_base_init (gpointer g_class);
static void gst_colorconvert_class_init (gpointer g_class, gpointer class_data);
static void gst_colorconvert_init (GTypeInstance * instance, gpointer g_class);
static void gst_colorconvert_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_colorconvert_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static gboolean gst_colorconvert_set_caps (GstBaseTransform * base_transform,
GstCaps * incaps, GstCaps * outcaps);
static GstFlowReturn gst_colorconvert_transform_ip (GstBaseTransform *
base_transform, GstBuffer * buf);
static CogFrame *cog_virt_frame_new_color_transform (CogFrame * frame);
static GstStaticPadTemplate gst_colorconvert_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("{I420,YUY2,UYVY,AYUV}"))
);
static GstStaticPadTemplate gst_colorconvert_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("{I420,YUY2,UYVY,AYUV}"))
);
GType
gst_colorconvert_get_type (void)
{
static GType compress_type = 0;
if (!compress_type) {
static const GTypeInfo compress_info = {
sizeof (GstColorconvertClass),
gst_colorconvert_base_init,
NULL,
gst_colorconvert_class_init,
NULL,
NULL,
sizeof (GstColorconvert),
0,
gst_colorconvert_init,
};
compress_type = g_type_register_static (GST_TYPE_BASE_TRANSFORM,
"GstColorconvert", &compress_info, 0);
}
return compress_type;
}
static void
gst_colorconvert_base_init (gpointer g_class)
{
static GstElementDetails compress_details =
GST_ELEMENT_DETAILS ("Video Filter Template",
"Filter/Effect/Video",
"Template for a video filter",
"David Schleef <ds@schleef.org>");
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_colorconvert_src_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_colorconvert_sink_template));
gst_element_class_set_details (element_class, &compress_details);
}
static void
gst_colorconvert_class_init (gpointer g_class, gpointer class_data)
{
GObjectClass *gobject_class;
GstBaseTransformClass *base_transform_class;
GstColorconvertClass *filter_class;
gobject_class = G_OBJECT_CLASS (g_class);
base_transform_class = GST_BASE_TRANSFORM_CLASS (g_class);
filter_class = GST_COLORCONVERT_CLASS (g_class);
gobject_class->set_property = gst_colorconvert_set_property;
gobject_class->get_property = gst_colorconvert_get_property;
base_transform_class->set_caps = gst_colorconvert_set_caps;
base_transform_class->transform_ip = gst_colorconvert_transform_ip;
}
static void
gst_colorconvert_init (GTypeInstance * instance, gpointer g_class)
{
GST_DEBUG ("gst_colorconvert_init");
}
static void
gst_colorconvert_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstColorconvert *src;
g_return_if_fail (GST_IS_COLORCONVERT (object));
src = GST_COLORCONVERT (object);
GST_DEBUG ("gst_colorconvert_set_property");
switch (prop_id) {
default:
break;
}
}
static void
gst_colorconvert_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstColorconvert *src;
g_return_if_fail (GST_IS_COLORCONVERT (object));
src = GST_COLORCONVERT (object);
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
gst_colorconvert_set_caps (GstBaseTransform * base_transform,
GstCaps * incaps, GstCaps * outcaps)
{
GstColorconvert *li;
g_return_val_if_fail (GST_IS_COLORCONVERT (base_transform), GST_FLOW_ERROR);
li = GST_COLORCONVERT (base_transform);
gst_video_format_parse_caps (incaps, &li->format, &li->width, &li->height);
return TRUE;
}
static GstFlowReturn
gst_colorconvert_transform_ip (GstBaseTransform * base_transform,
GstBuffer * buf)
{
GstColorconvert *li;
CogFrame *frame;
CogFrame *vf;
g_return_val_if_fail (GST_IS_COLORCONVERT (base_transform), GST_FLOW_ERROR);
li = GST_COLORCONVERT (base_transform);
frame = gst_cog_buffer_wrap (gst_buffer_ref (buf),
li->format, li->width, li->height);
vf = cog_virt_frame_new_unpack (cog_frame_ref (frame));
vf = cog_virt_frame_new_subsample (vf, COG_FRAME_FORMAT_U8_444);
vf = cog_virt_frame_new_color_transform (vf);
if (frame->format == COG_FRAME_FORMAT_YUYV) {
vf = cog_virt_frame_new_subsample (vf, COG_FRAME_FORMAT_U8_422);
vf = cog_virt_frame_new_pack_YUY2 (vf);
} else if (frame->format == COG_FRAME_FORMAT_UYVY) {
vf = cog_virt_frame_new_subsample (vf, COG_FRAME_FORMAT_U8_422);
vf = cog_virt_frame_new_pack_UYVY (vf);
} else if (frame->format == COG_FRAME_FORMAT_AYUV) {
vf = cog_virt_frame_new_pack_AYUV (vf);
} else if (frame->format == COG_FRAME_FORMAT_U8_420) {
vf = cog_virt_frame_new_subsample (vf, COG_FRAME_FORMAT_U8_420);
} else {
g_assert_not_reached ();
}
cog_virt_frame_render (vf, frame);
cog_frame_unref (frame);
cog_frame_unref (vf);
return GST_FLOW_OK;
}
static void
color_transform (CogFrame * frame, void *_dest, int component, int j)
{
uint8_t *dest = _dest;
uint8_t *src_y;
uint8_t *src_u;
uint8_t *src_v;
uint8_t *table;
int i;
table = COG_OFFSET (frame->virt_priv2, component * 0x1000000);
src_y = cog_virt_frame_get_line (frame->virt_frame1, 0, j);
src_u = cog_virt_frame_get_line (frame->virt_frame1, 1, j);
src_v = cog_virt_frame_get_line (frame->virt_frame1, 2, j);
for (i = 0; i < frame->width; i++) {
dest[i] = table[(src_y[i] << 16) | (src_u[i] << 8) | (src_v[i])];
}
}
static uint8_t *get_color_transform_table (void);
static CogFrame *
cog_virt_frame_new_color_transform (CogFrame * frame)
{
CogFrame *virt_frame;
g_return_val_if_fail (frame->format == COG_FRAME_FORMAT_U8_444, NULL);
virt_frame = cog_frame_new_virtual (NULL, COG_FRAME_FORMAT_U8_444,
frame->width, frame->height);
virt_frame->virt_frame1 = frame;
virt_frame->render_line = color_transform;
virt_frame->virt_priv2 = get_color_transform_table ();
return virt_frame;
}
/* our simple CMS */
typedef struct _Color Color;
typedef struct _ColorMatrix ColorMatrix;
struct _Color
{
double v[3];
};
struct _ColorMatrix
{
double m[4][4];
};
void
color_xyY_to_XYZ (Color * c)
{
if (c->v[1] == 0) {
c->v[0] = 0;
c->v[1] = 0;
c->v[2] = 0;
} else {
double X, Y, Z;
X = c->v[0] * c->v[2] / c->v[1];
Y = c->v[2];
Z = (1.0 - c->v[0] - c->v[1]) * c->v[2] / c->v[1];
c->v[0] = X;
c->v[1] = Y;
c->v[2] = Z;
}
}
void
color_XYZ_to_xyY (Color * c)
{
double d;
d = c->v[0] + c->v[1] + c->v[2];
if (d == 0) {
c->v[0] = 0.3128;
c->v[1] = 0.3290;
c->v[2] = 0;
} else {
double x, y, Y;
x = c->v[0] / d;
y = c->v[1] / d;
Y = c->v[1];
c->v[0] = x;
c->v[1] = y;
c->v[2] = Y;
}
}
void
color_set (Color * c, double x, double y, double z)
{
c->v[0] = x;
c->v[1] = y;
c->v[2] = z;
}
void
color_matrix_set_identity (ColorMatrix * m)
{
int i, j;
for (i = 0; i < 4; i++) {
for (j = 0; j < 4; j++) {
m->m[i][j] = (i == j);
}
}
}
/* Prettyprint a 4x4 matrix @m@ */
void
color_matrix_dump (ColorMatrix * m)
{
int i, j;
printf ("[\n");
for (i = 0; i < 4; i++) {
printf (" ");
for (j = 0; j < 4; j++) {
printf (" %8.5g", m->m[i][j]);
}
printf ("\n");
}
printf ("]\n");
}
/* Perform 4x4 matrix multiplication:
* - @dst@ = @a@ * @b@
* - @dst@ may be a pointer to @a@ andor @b@
*/
void
color_matrix_multiply (ColorMatrix * dst, ColorMatrix * a, ColorMatrix * b)
{
ColorMatrix tmp;
int i, j, k;
for (i = 0; i < 4; i++) {
for (j = 0; j < 4; j++) {
double x = 0;
for (k = 0; k < 4; k++) {
x += a->m[i][k] * b->m[k][j];
}
tmp.m[i][j] = x;
}
}
memcpy (dst, &tmp, sizeof (ColorMatrix));
}
void
color_matrix_apply (ColorMatrix * m, Color * dest, Color * src)
{
int i;
Color tmp;
for (i = 0; i < 3; i++) {
double x = 0;
x += m->m[i][0] * src->v[0];
x += m->m[i][1] * src->v[1];
x += m->m[i][2] * src->v[2];
x += m->m[i][3];
tmp.v[i] = x;
}
memcpy (dest, &tmp, sizeof (tmp));
}
void
color_matrix_offset_components (ColorMatrix * m, double a1, double a2,
double a3)
{
ColorMatrix a;
color_matrix_set_identity (&a);
a.m[0][3] = a1;
a.m[1][3] = a2;
a.m[2][3] = a3;
color_matrix_multiply (m, &a, m);
}
void
color_matrix_scale_components (ColorMatrix * m, double a1, double a2, double a3)
{
ColorMatrix a;
color_matrix_set_identity (&a);
a.m[0][0] = a1;
a.m[1][1] = a2;
a.m[2][2] = a3;
color_matrix_multiply (m, &a, m);
}
void
color_matrix_YCbCr_to_RGB (ColorMatrix * m, double Kr, double Kb)
{
double Kg = 1.0 - Kr - Kb;
ColorMatrix k = {
{
{1., 0., 2 * (1 - Kr), 0.},
{1., -2 * Kb * (1 - Kb) / Kg, -2 * Kr * (1 - Kr) / Kg, 0.},
{1., 2 * (1 - Kb), 0., 0.},
{0., 0., 0., 1.},
}
};
color_matrix_multiply (m, &k, m);
}
void
color_matrix_RGB_to_YCbCr (ColorMatrix * m, double Kr, double Kb)
{
double Kg = 1.0 - Kr - Kb;
ColorMatrix k;
double x;
k.m[0][0] = Kr;
k.m[0][1] = Kg;
k.m[0][2] = Kb;
k.m[0][3] = 0;
x = 1 / (2 * (1 - Kb));
k.m[1][0] = -x * Kr;
k.m[1][1] = -x * Kg;
k.m[1][2] = x * (1 - Kb);
k.m[1][3] = 0;
x = 1 / (2 * (1 - Kr));
k.m[2][0] = x * (1 - Kr);
k.m[2][1] = -x * Kg;
k.m[2][2] = -x * Kb;
k.m[2][3] = 0;
k.m[3][0] = 0;
k.m[3][1] = 0;
k.m[3][2] = 0;
k.m[3][3] = 1;
color_matrix_multiply (m, &k, m);
}
void
color_matrix_build_yuv_to_rgb_601 (ColorMatrix * dst)
{
/*
* At this point, everything is in YCbCr
* All components are in the range [0,255]
*/
color_matrix_set_identity (dst);
/* offset required to get input video black to (0.,0.,0.) */
color_matrix_offset_components (dst, -16, -128, -128);
/* scale required to get input video black to (0.,0.,0.) */
color_matrix_scale_components (dst, (1 / 219.0), (1 / 224.0), (1 / 224.0));
/* colour matrix, YCbCr -> RGB */
/* Requires Y in [0,1.0], Cb&Cr in [-0.5,0.5] */
color_matrix_YCbCr_to_RGB (dst, 0.2990, 0.1140); /* SD */
/*
* We are now in RGB space
*/
#if 0
/* scale to output range. */
color_matrix_scale_components (dst, 255.0, 255.0, 255.0);
#endif
}
void
color_matrix_build_bt709_to_bt601 (ColorMatrix * dst)
{
color_matrix_set_identity (dst);
/* offset required to get input video black to (0.,0.,0.) */
color_matrix_offset_components (dst, -16, -128, -128);
/* scale required to get input video black to (0.,0.,0.) */
color_matrix_scale_components (dst, (1 / 219.0), (1 / 224.0), (1 / 224.0));
/* colour matrix, YCbCr -> RGB */
/* Requires Y in [0,1.0], Cb&Cr in [-0.5,0.5] */
color_matrix_YCbCr_to_RGB (dst, 0.2126, 0.0722); /* HD */
color_matrix_RGB_to_YCbCr (dst, 0.2990, 0.1140); /* SD */
color_matrix_scale_components (dst, 219.0, 224.0, 224.0);
color_matrix_offset_components (dst, 16, 128, 128);
}
void
color_matrix_build_rgb_to_yuv_601 (ColorMatrix * dst)
{
color_matrix_set_identity (dst);
color_matrix_RGB_to_YCbCr (dst, 0.2990, 0.1140); /* SD */
color_matrix_scale_components (dst, 219.0, 224.0, 224.0);
color_matrix_offset_components (dst, 16, 128, 128);
{
Color c;
int i;
for (i = 7; i >= 0; i--) {
color_set (&c, (i & 2) ? 0.75 : 0.0, (i & 4) ? 0.75 : 0.0,
(i & 1) ? 0.75 : 0.0);
color_matrix_apply (dst, &c, &c);
g_print (" { %g, %g, %g },\n", rint (c.v[0]), rint (c.v[1]),
rint (c.v[2]));
}
color_set (&c, -0.075, -0.075, -0.075);
color_matrix_apply (dst, &c, &c);
g_print (" { %g, %g, %g },\n", rint (c.v[0]), rint (c.v[1]),
rint (c.v[2]));
color_set (&c, 0.075, 0.075, 0.075);
color_matrix_apply (dst, &c, &c);
g_print (" { %g, %g, %g },\n", rint (c.v[0]), rint (c.v[1]),
rint (c.v[2]));
}
}
void
color_matrix_invert (ColorMatrix * m)
{
ColorMatrix tmp;
int i, j;
double det;
color_matrix_set_identity (&tmp);
for (j = 0; j < 3; j++) {
for (i = 0; i < 3; i++) {
tmp.m[j][i] =
m->m[(i + 1) % 3][(j + 1) % 3] * m->m[(i + 2) % 3][(j + 2) % 3] -
m->m[(i + 1) % 3][(j + 2) % 3] * m->m[(i + 2) % 3][(j + 1) % 3];
}
}
det =
tmp.m[0][0] * m->m[0][0] + tmp.m[0][1] * m->m[1][0] +
tmp.m[0][2] * m->m[2][0];
for (j = 0; j < 3; j++) {
for (i = 0; i < 3; i++) {
tmp.m[i][j] /= det;
}
}
memcpy (m, &tmp, sizeof (tmp));
}
void
color_matrix_copy (ColorMatrix * dest, ColorMatrix * src)
{
memcpy (dest, src, sizeof (ColorMatrix));
}
void
color_matrix_transpose (ColorMatrix * m)
{
int i, j;
ColorMatrix tmp;
color_matrix_set_identity (&tmp);
for (i = 0; i < 3; i++) {
for (j = 0; j < 3; j++) {
tmp.m[i][j] = m->m[j][i];
}
}
memcpy (m, &tmp, sizeof (ColorMatrix));
}
void
color_matrix_build_XYZ (ColorMatrix * dst,
double rx, double ry,
double gx, double gy, double bx, double by, double wx, double wy)
{
Color r, g, b, w, scale;
ColorMatrix m;
color_set (&r, rx, ry, 1.0);
color_xyY_to_XYZ (&r);
color_set (&g, gx, gy, 1.0);
color_xyY_to_XYZ (&g);
color_set (&b, bx, by, 1.0);
color_xyY_to_XYZ (&b);
color_set (&w, wx, wy, 1.0);
color_xyY_to_XYZ (&w);
color_matrix_set_identity (dst);
dst->m[0][0] = r.v[0];
dst->m[0][1] = r.v[1];
dst->m[0][2] = r.v[2];
dst->m[1][0] = g.v[0];
dst->m[1][1] = g.v[1];
dst->m[1][2] = g.v[2];
dst->m[2][0] = b.v[0];
dst->m[2][1] = b.v[1];
dst->m[2][2] = b.v[2];
color_matrix_dump (dst);
color_matrix_copy (&m, dst);
color_matrix_invert (&m);
color_matrix_dump (&m);
color_matrix_transpose (&m);
color_matrix_apply (&m, &scale, &w);
g_print ("%g %g %g\n", scale.v[0], scale.v[1], scale.v[2]);
dst->m[0][0] = r.v[0] * scale.v[0];
dst->m[0][1] = r.v[1] * scale.v[0];
dst->m[0][2] = r.v[2] * scale.v[0];
dst->m[1][0] = g.v[0] * scale.v[1];
dst->m[1][1] = g.v[1] * scale.v[1];
dst->m[1][2] = g.v[2] * scale.v[1];
dst->m[2][0] = b.v[0] * scale.v[2];
dst->m[2][1] = b.v[1] * scale.v[2];
dst->m[2][2] = b.v[2] * scale.v[2];
color_matrix_transpose (dst);
color_matrix_dump (dst);
color_set (&scale, 1, 1, 1);
color_matrix_apply (dst, &scale, &scale);
color_XYZ_to_xyY (&scale);
g_print ("white %g %g %g\n", scale.v[0], scale.v[1], scale.v[2]);
}
void
color_matrix_build_rgb_to_XYZ_601 (ColorMatrix * dst)
{
/* SMPTE C primaries, SMPTE 170M-2004 */
color_matrix_build_XYZ (dst,
0.630, 0.340, 0.310, 0.595, 0.155, 0.070, 0.3127, 0.3290);
#if 0
/* NTSC 1953 primaries, SMPTE 170M-2004 */
color_matrix_build_XYZ (dst,
0.67, 0.33, 0.21, 0.71, 0.14, 0.08, 0.3127, 0.3290);
#endif
}
void
color_matrix_build_XYZ_to_rgb_709 (ColorMatrix * dst)
{
/* Rec. ITU-R BT.709-5 */
color_matrix_build_XYZ (dst,
0.640, 0.330, 0.300, 0.600, 0.150, 0.060, 0.3127, 0.3290);
}
void
color_matrix_build_XYZ_to_rgb_dell (ColorMatrix * dst)
{
/* Dell monitor */
#if 1
color_matrix_build_XYZ (dst,
0.662, 0.329, 0.205, 0.683, 0.146, 0.077, 0.3135, 0.3290);
#endif
#if 0
color_matrix_build_XYZ (dst,
0.630, 0.340, 0.310, 0.595, 0.155, 0.070, 0.3127, 0.3290);
#endif
color_matrix_invert (dst);
}
void
color_transfer_function_apply (Color * dest, Color * src)
{
int i;
for (i = 0; i < 3; i++) {
if (src->v[i] < 0.0812) {
dest->v[i] = src->v[i] / 4.500;
} else {
dest->v[i] = pow (src->v[i] + 0.099, 1 / 0.4500);
}
}
}
void
color_transfer_function_unapply (Color * dest, Color * src)
{
int i;
for (i = 0; i < 3; i++) {
if (src->v[i] < 0.0812 / 4.500) {
dest->v[i] = src->v[i] * 4.500;
} else {
dest->v[i] = pow (src->v[i], 0.4500) - 0.099;
}
}
}
void
color_gamut_clamp (Color * dest, Color * src)
{
dest->v[0] = CLAMP (src->v[0], 0.0, 1.0);
dest->v[1] = CLAMP (src->v[1], 0.0, 1.0);
dest->v[2] = CLAMP (src->v[2], 0.0, 1.0);
}
static uint8_t *
get_color_transform_table (void)
{
static uint8_t *color_transform_table = NULL;
#if 1
if (!color_transform_table) {
ColorMatrix bt601_to_rgb;
ColorMatrix bt601_to_yuv;
ColorMatrix bt601_rgb_to_XYZ;
ColorMatrix dell_XYZ_to_rgb;
uint8_t *table_y;
uint8_t *table_u;
uint8_t *table_v;
int y, u, v;
color_matrix_build_yuv_to_rgb_601 (&bt601_to_rgb);
color_matrix_build_rgb_to_yuv_601 (&bt601_to_yuv);
color_matrix_build_rgb_to_XYZ_601 (&bt601_rgb_to_XYZ);
color_matrix_build_XYZ_to_rgb_dell (&dell_XYZ_to_rgb);
color_transform_table = g_malloc (0x1000000 * 3);
table_y = COG_OFFSET (color_transform_table, 0 * 0x1000000);
table_u = COG_OFFSET (color_transform_table, 1 * 0x1000000);
table_v = COG_OFFSET (color_transform_table, 2 * 0x1000000);
for (y = 0; y < 256; y++) {
for (u = 0; u < 256; u++) {
for (v = 0; v < 256; v++) {
Color c;
c.v[0] = y;
c.v[1] = u;
c.v[2] = v;
color_matrix_apply (&bt601_to_rgb, &c, &c);
color_gamut_clamp (&c, &c);
color_transfer_function_apply (&c, &c);
color_matrix_apply (&bt601_rgb_to_XYZ, &c, &c);
color_matrix_apply (&dell_XYZ_to_rgb, &c, &c);
color_transfer_function_unapply (&c, &c);
color_gamut_clamp (&c, &c);
color_matrix_apply (&bt601_to_yuv, &c, &c);
table_y[(y << 16) | (u << 8) | (v)] = rint (c.v[0]);
table_u[(y << 16) | (u << 8) | (v)] = rint (c.v[1]);
table_v[(y << 16) | (u << 8) | (v)] = rint (c.v[2]);
}
}
}
}
#endif
#if 0
if (!color_transform_table) {
ColorMatrix bt709_to_bt601;
uint8_t *table_y;
uint8_t *table_u;
uint8_t *table_v;
int y, u, v;
color_matrix_build_bt709_to_bt601 (&bt709_to_bt601);
color_transform_table = g_malloc (0x1000000 * 3);
table_y = COG_OFFSET (color_transform_table, 0 * 0x1000000);
table_u = COG_OFFSET (color_transform_table, 1 * 0x1000000);
table_v = COG_OFFSET (color_transform_table, 2 * 0x1000000);
for (y = 0; y < 256; y++) {
for (u = 0; u < 256; u++) {
for (v = 0; v < 256; v++) {
Color c;
c.v[0] = y;
c.v[1] = u;
c.v[2] = v;
color_matrix_apply (&bt709_to_bt601, &c, &c);
table_y[(y << 16) | (u << 8) | (v)] = rint (c.v[0]);
table_u[(y << 16) | (u << 8) | (v)] = rint (c.v[1]);
table_v[(y << 16) | (u << 8) | (v)] = rint (c.v[2]);
}
}
}
}
#endif
return color_transform_table;
}
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