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https://github.com/game-stop/veejay.git
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Initial checkin of veejay 1.4
git-svn-id: svn://code.dyne.org/veejay/trunk@1172 eb8d1916-c9e9-0310-b8de-cf0c9472ead5
This commit is contained in:
Niels Elburg
266
veejay-current/veejay-server/libvje/effects/complexthreshold.c
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266
veejay-current/veejay-server/libvje/effects/complexthreshold.c
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/*
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* Linux VeeJay
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*
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* Copyright(C)2004 Niels Elburg <elburg@hio.hen.nl>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License , or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307 , USA.
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*/
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#include <stdint.h>
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#include <libvjmem/vjmem.h>
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#include "rgbkey.h"
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#include <stdlib.h>
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#include <math.h>
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#include "common.h"
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#include "complexthreshold.h"
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vj_effect *complexthreshold_init(int w, int h)
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{
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vj_effect *ve;
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ve = (vj_effect *) vj_calloc(sizeof(vj_effect));
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ve->num_params = 6;
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ve->defaults = (int *) vj_calloc(sizeof(int) * ve->num_params); /* default values */
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ve->limits[0] = (int *) vj_calloc(sizeof(int) * ve->num_params); /* min */
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ve->limits[1] = (int *) vj_calloc(sizeof(int) * ve->num_params); /* max */
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ve->defaults[0] = 80; /* angle */
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ve->defaults[1] = 0; /* r */
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ve->defaults[2] = 0; /* g */
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ve->defaults[3] = 255; /* b */
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ve->defaults[4] = 1; /* smoothen level */
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ve->defaults[5] = 255; /* threshold */
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ve->limits[0][0] = 5;
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ve->limits[1][0] = 900;
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ve->limits[0][1] = 0;
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ve->limits[1][1] = 255;
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ve->limits[0][2] = 0;
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ve->limits[1][2] = 255;
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ve->limits[0][3] = 0;
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ve->limits[1][3] = 255;
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ve->limits[0][5] = 0;
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ve->limits[1][5] = 255;
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ve->limits[0][4] = 0;
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ve->limits[1][4] = 4;
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ve->description = "Complex Threshold (fixme)";
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ve->extra_frame = 1;
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ve->sub_format = 1;
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ve->has_user = 0;
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ve->rgb_conv = 1;
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ve->param_description = vje_build_param_list( ve->num_params,"Angle", "Red", "Green", "Blue", "Smoothen", "Threshold" );
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return ve;
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}
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/* this method decides whether or not a pixel from the fg will be accepted for keying */
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int accept_tpixel(uint8_t fg_cb, uint8_t fg_cr, int cb, int cr,
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int accept_angle_tg)
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{
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short xx, yy;
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/* convert foreground to xz coordinates where x direction is
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defined by key color */
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int val;
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xx = ((fg_cb * cb) + (fg_cr * cr)) >> 7;
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if (xx < -128) {
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xx = -128;
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}
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if (xx > 127) {
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xx = 127;
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}
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yy = ((fg_cr * cb) - (fg_cb * cr)) >> 7;
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if (yy < -128) {
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yy = -128;
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}
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if (yy > 127) {
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yy = 127;
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}
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/* accept angle should not be > 90 degrees
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reasonable results between 10 and 80 degrees.
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*/
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val = (xx * accept_angle_tg) >> 4;
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if (val > 127)
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val = 127;
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if (abs(yy) < val) {
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return 1;
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}
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return 0;
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}
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void complexthreshold_apply(VJFrame *frame, VJFrame *frame2, int width,
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int height, int i_angle, int r, int g, int b,
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int level, int threshold)
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{
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uint8_t *fg_y, *fg_cb, *fg_cr;
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uint8_t *bg_y, *bg_cb, *bg_cr;
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int accept_angle_tg, accept_angle_ctg, one_over_kc;
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int kfgy_scale, kg;
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int cb, cr;
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int kbg, x1, y1;
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float kg1, tmp, aa = 128, bb = 128, _y = 0;
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float angle = (float) i_angle / 10.0;
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//float noise_level = 350.0;
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unsigned int pos;
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int matrix[5];
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int val, tmp1;
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const int len = frame->len;
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uint8_t *Y = frame->data[0];
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uint8_t *Cb = frame->data[1];
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uint8_t *Cr = frame->data[2];
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uint8_t *Y2 = frame2->data[0];
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uint8_t *Cb2 = frame2->data[1];
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uint8_t *Cr2 = frame2->data[2];
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int iy,iv,iu;
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_rgb2yuv(r,g,b,iy,iu,iv);
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_y = (float)iy;
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aa = (float)iu;
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bb = (float)iv;
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tmp = sqrt(((aa * aa) + (bb * bb)));
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cb = 127 * (aa / tmp);
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cr = 127 * (bb / tmp);
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kg1 = tmp;
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/* obtain coordinate system for cb / cr */
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accept_angle_tg = 0xf * tan(M_PI * angle / 180.0);
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accept_angle_ctg = 0xf / tan(M_PI * angle / 180.0);
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tmp = 1 / kg1;
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one_over_kc = 0xff * 2 * tmp - 0xff;
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kfgy_scale = 0xf * (float) (_y) / kg1;
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kg = kg1;
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/* intialize pointers */
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fg_y = Y2;
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fg_cb = Cb2;
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fg_cr = Cr2;
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bg_y = Y;
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bg_cb = Cb;
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bg_cr = Cr;
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for (pos = width + 1; pos < (len) - width - 1; pos++) {
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int i = 0;
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int smooth = 0;
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/* setup matrix
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[ - 0 - ] = do not accept. [ - 1 - ] = level 5 , accept only when all n = 1
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[ 0 0 0 ] [ 1 1 1 ]
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[ - 0 - ] [ - 1 - ]
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[ - 0 - ] sum of all n is acceptance value for level
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[ 1 0 1 ]
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[ 0 1 0 ]
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*/
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matrix[0] = accept_tpixel(fg_cb[pos], fg_cr[pos], cb, cr, accept_angle_tg); /* center pixel */
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matrix[1] = accept_tpixel(fg_cb[pos - 1], fg_cr[pos - 1], cb, cr, accept_angle_tg); /* left pixel */
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matrix[2] = accept_tpixel(fg_cb[pos + 1], fg_cr[pos + 1], cb, cr, accept_angle_tg); /* right pixel */
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matrix[3] = accept_tpixel(fg_cb[pos + width], fg_cr[pos + width], cb, cr, accept_angle_tg); /* top pixel */
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matrix[4] = accept_tpixel(fg_cb[pos - width], fg_cr[pos - width], cb, cr, accept_angle_tg); /* bottom pixel */
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for (i = 0; i < 5; i++) {
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if (matrix[i] == 1)
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smooth++;
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}
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if (smooth >= level) {
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short xx, yy;
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/* get bg/fg pixels */
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uint8_t p1 = (matrix[0] == 0 ? fg_y[pos] : bg_y[pos]);
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uint8_t p2 = (matrix[1] == 0 ? fg_y[pos - 1] : bg_y[pos - 1]);
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uint8_t p3 = (matrix[2] == 0 ? fg_y[pos + 1] : bg_y[pos + 1]);
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uint8_t p4 =
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(matrix[3] == 0 ? fg_y[pos + width] : bg_y[pos + width]);
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uint8_t p5 =
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(matrix[4] == 0 ? fg_y[pos - width] : bg_y[pos - width]);
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/* and blur the pixel */
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fg_y[pos] = (p1 + p2 + p3 + p4 + p5 + p1) / 6;
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/* convert foreground to xz coordinates where x direction is
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defined by key color */
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xx = (((fg_cb[pos]) * cb) + ((fg_cr[pos]) * cr)) >> 7;
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if (xx < -128) {
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xx = -128;
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}
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if (xx > 127) {
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xx = 127;
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}
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yy = (((fg_cr[pos]) * cb) - ((fg_cb[pos]) * cr)) >> 7;
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if (yy < -128) {
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yy = -128;
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}
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if (yy > 127) {
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yy = 127;
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}
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val = (xx * accept_angle_tg) >> 4;
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if (val > 127)
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val = 127;
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/* see if pixel is within range of color and threshold */
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if (abs(yy) < val && fg_y[pos] > threshold) {
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val = (xx * accept_angle_tg) >> 4;
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if (val > 127)
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val = 127;
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val = (yy * accept_angle_ctg) >> 4;
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x1 = abs(val);
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y1 = yy;
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tmp1 = xx - x1;
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kbg = (tmp1 * one_over_kc) >> 1;
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if (kbg < 0)
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kbg = 0;
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if (kbg > 255)
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kbg = 255;
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val = (tmp1 * kfgy_scale) >> 4;
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if (val > 0xff)
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val = 0xff;
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Y[pos] = fg_y[pos] - val;
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/* convert suppressed fg back to cbcr */
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Cb[pos] = ((x1 * cb) - (y1 * cr)) >> 7;
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Cr[pos] = ((x1 * cr) - (y1 * cb)) >> 7;
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val = (yy * yy) + (kg * kg);
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if (val > 0xff)
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val = 0xff;
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if (val < (35 * 35)) {
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kbg = 255;
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}
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Y[pos] = (Y[pos] + (kbg * bg_y[pos])) >> 8;
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// Y[pos] = CLAMP_Y(val);
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Cb[pos] = (Cb[pos] + (kbg * bg_cb[pos])) >> 8;
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// Cb[pos] = CLAMP_UV(val);
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Cr[pos] = (Cr[pos] + (kbg * bg_cr[pos])) >> 8;
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// Cr[pos] = CLAMP_UV(val);
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}
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}
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}
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}
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void complexthreshold_free(){}
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