static void
gst_color_effects_transform_rgb (GstColorEffects * filter,
GstVideoFrame * frame)
{
gint i, j;
gint width, height;
gint pixel_stride, row_stride, row_wrap;
guint32 r, g, b;
guint32 luma;
gint offsets[3];
guint8 *data;
data = GST_VIDEO_FRAME_PLANE_DATA (frame, 0);
offsets[0] = GST_VIDEO_FRAME_COMP_POFFSET (frame, 0);
offsets[1] = GST_VIDEO_FRAME_COMP_POFFSET (frame, 1);
offsets[2] = GST_VIDEO_FRAME_COMP_POFFSET (frame, 2);
width = GST_VIDEO_FRAME_WIDTH (frame);
height = GST_VIDEO_FRAME_HEIGHT (frame);
row_stride = GST_VIDEO_FRAME_PLANE_STRIDE (frame, 0);
pixel_stride = GST_VIDEO_FRAME_COMP_PSTRIDE (frame, 0);
row_wrap = row_stride - pixel_stride * width;
/* transform */
for (i = 0; i < height; i++) {
for (j = 0; j < width; j++) {
r = data[offsets[0]];
g = data[offsets[1]];
b = data[offsets[2]];
if (filter->map_luma) {
/* BT. 709 coefficients in B8 fixed point */
/* 0.2126 R + 0.7152 G + 0.0722 B */
luma = ((r << 8) * 54) + ((g << 8) * 183) + ((b << 8) * 19);
luma >>= 16; /* get integer part */
luma *= 3; /* times 3 to retrieve the correct pixel from
* the lut */
/* map luma to lookup table */
/* src.luma |-> table[luma].rgb */
data[offsets[0]] = filter->table[luma];
data[offsets[1]] = filter->table[luma + 1];
data[offsets[2]] = filter->table[luma + 2];
} else {
/* map each color component to the correspondent lut color */
/* src.r |-> table[r].r */
/* src.g |-> table[g].g */
/* src.b |-> table[b].b */
data[offsets[0]] = filter->table[r * 3];
data[offsets[1]] = filter->table[g * 3 + 1];
data[offsets[2]] = filter->table[b * 3 + 2];
}
data += pixel_stride;
}
static void
gst_chroma_hold_process_xrgb (GstVideoFrame * frame, gint width,
gint height, GstChromaHold * self)
{
gint i, j;
gint r, g, b;
gint grey;
gint h1, h2;
gint tolerance = self->tolerance;
gint p[4];
gint diff;
gint row_wrap;
guint8 *dest;
dest = GST_VIDEO_FRAME_PLANE_DATA (frame, 0);
p[0] = GST_VIDEO_FRAME_COMP_POFFSET (frame, 3);
p[1] = GST_VIDEO_FRAME_COMP_POFFSET (frame, 0);
p[2] = GST_VIDEO_FRAME_COMP_POFFSET (frame, 1);
p[3] = GST_VIDEO_FRAME_COMP_POFFSET (frame, 2);
row_wrap = GST_VIDEO_FRAME_PLANE_STRIDE (frame, 0) - 4 * width;
h1 = self->hue;
for (i = 0; i < height; i++) {
for (j = 0; j < width; j++) {
r = dest[p[1]];
g = dest[p[2]];
b = dest[p[3]];
h2 = rgb_to_hue (r, g, b);
diff = hue_dist (h1, h2);
if (h1 == G_MAXUINT || diff > tolerance) {
grey = (13938 * r + 46869 * g + 4730 * b) >> 16;
grey = CLAMP (grey, 0, 255);
dest[p[1]] = grey;
dest[p[2]] = grey;
dest[p[3]] = grey;
}
dest += 4;
}
dest += row_wrap;
}
