gstreamer/gst/goom/goom_core.c
Thomas Vander Stichele 5d25c00e4b gst-indent
Original commit message from CVS:
gst-indent
2004-03-14 22:34:33 +00:00

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9.6 KiB
C
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#include <stdlib.h>
#include <string.h>
#include "goom_core.h"
#include "goom_tools.h"
#include "filters.h"
#include "lines.h"
/*#define VERBOSE */
#ifdef VERBOSE
#include <stdio.h>
#endif
#define STOP_SPEED 128
/**-----------------------------------------------------**
** SHARED DATA **
**-----------------------------------------------------**/
static guint32 *pixel;
static guint32 *back;
static guint32 *p1, *p2, *tmp;
static guint32 cycle;
guint32 resolx, resoly, buffsize;
void
goom_init (guint32 resx, guint32 resy)
{
#ifdef VERBOSE
printf ("GOOM: init (%d, %d);\n", resx, resy);
#endif
resolx = resx;
resoly = resy;
buffsize = resx * resy;
pixel = (guint32 *) malloc (buffsize * sizeof (guint32) + 128);
back = (guint32 *) malloc (buffsize * sizeof (guint32) + 128);
RAND_INIT (GPOINTER_TO_INT (pixel));
cycle = 0;
p1 = (void *) (((unsigned long) pixel + 0x7f) & (~0x7f));
p2 = (void *) (((unsigned long) back + 0x7f) & (~0x7f));
}
void
goom_set_resolution (guint32 resx, guint32 resy)
{
free (pixel);
free (back);
resolx = resx;
resoly = resy;
buffsize = resx * resy;
pixel = (guint32 *) malloc (buffsize * sizeof (guint32) + 128);
memset (pixel, 0, buffsize * sizeof (guint32) + 128);
back = (guint32 *) malloc (buffsize * sizeof (guint32) + 128);
memset (back, 0, buffsize * sizeof (guint32) + 128);
p1 = (void *) (((unsigned long) pixel + 0x7f) & (~0x7f));
p2 = (void *) (((unsigned long) back + 0x7f) & (~0x7f));
}
guint32 *
goom_update (gint16 data[2][512])
{
static int lockvar = 0; /* pour empecher de nouveaux changements */
static int goomvar = 0; /* boucle des gooms */
static int totalgoom = 0; /* nombre de gooms par seconds */
static int agoom = 0; /* un goom a eu lieu.. */
static int loopvar = 0; /* mouvement des points */
static int speedvar = 0; /* vitesse des particules */
static int lineMode = 0; /* l'effet lineaire a dessiner */
guint32 *return_val;
guint32 pointWidth;
guint32 pointHeight;
int incvar; /* volume du son */
int accelvar; /* acceleration des particules */
int i;
float largfactor; /* elargissement de l'intervalle d'<27>volution des points */
static char goomlimit = 2; /* sensibilit<69> du goom */
static ZoomFilterData zfd = {
128, 8, 16,
1, 1, 0, WAVE_MODE,
0, 0, 0
};
ZoomFilterData *pzfd;
/* test if the config has changed, update it if so */
pointWidth = (resolx * 2) / 5;
pointHeight = (resoly * 2) / 5;
/* ! etude du signal ... */
incvar = 0;
for (i = 0; i < 512; i++) {
if (incvar < data[0][i])
incvar = data[0][i];
}
accelvar = incvar / 5000;
if (speedvar > 5) {
accelvar--;
if (speedvar > 20)
accelvar--;
if (speedvar > 40)
speedvar = 40;
}
accelvar--;
speedvar += accelvar;
if (speedvar < 0)
speedvar = 0;
if (speedvar > 40)
speedvar = 40;
/* ! calcul du deplacement des petits points ... */
largfactor = ((float) speedvar / 40.0f + (float) incvar / 50000.0f) / 1.5f;
if (largfactor > 1.5f)
largfactor = 1.5f;
for (i = 1; i * 15 <= speedvar + 15; i++) {
loopvar += speedvar + 1;
pointFilter (p1,
YELLOW,
((pointWidth - 6.0f) * largfactor + 5.0f),
((pointHeight - 6.0f) * largfactor + 5.0f),
i * 152.0f, 128.0f, loopvar + i * 2032);
pointFilter (p1, ORANGE,
((pointWidth / 2) * largfactor) / i + 10.0f * i,
((pointHeight / 2) * largfactor) / i + 10.0f * i,
96.0f, i * 80.0f, loopvar / i);
pointFilter (p1, VIOLET,
((pointHeight / 3 + 5.0f) * largfactor) / i + 10.0f * i,
((pointHeight / 3 + 5.0f) * largfactor) / i + 10.0f * i,
i + 122.0f, 134.0f, loopvar / i);
pointFilter (p1, BLACK,
((pointHeight / 3) * largfactor + 20.0f),
((pointHeight / 3) * largfactor + 20.0f),
58.0f, i * 66.0f, loopvar / i);
pointFilter (p1, WHITE,
(pointHeight * largfactor + 10.0f * i) / i,
(pointHeight * largfactor + 10.0f * i) / i,
66.0f, 74.0f, loopvar + i * 500);
}
/* par d<>faut pas de changement de zoom */
pzfd = NULL;
/* diminuer de 1 le temps de lockage */
/* note pour ceux qui n'ont pas suivis : le lockvar permet d'empecher un */
/* changement d'etat du plugins juste apres un autre changement d'etat. oki ? */
if (--lockvar < 0)
lockvar = 0;
/* temps du goom */
if (--agoom < 0)
agoom = 0;
/* on verifie qu'il ne se pas un truc interressant avec le son. */
if ((accelvar > goomlimit) || (accelvar < -goomlimit)) {
/* UN GOOM !!! YAHOO ! */
totalgoom++;
agoom = 20; /* mais pdt 20 cycles, il n'y en aura plus. */
lineMode = (lineMode + 1) % 20; /* Tous les 10 gooms on change de mode lineaire */
/* changement eventuel de mode */
switch (iRAND (10)) {
case 0:
case 1:
case 2:
zfd.mode = WAVE_MODE;
zfd.vitesse = STOP_SPEED - 1;
zfd.reverse = 0;
break;
case 3:
case 4:
zfd.mode = CRYSTAL_BALL_MODE;
break;
case 5:
zfd.mode = AMULETTE_MODE;
break;
case 6:
zfd.mode = WATER_MODE;
break;
case 7:
zfd.mode = SCRUNCH_MODE;
break;
default:
zfd.mode = NORMAL_MODE;
}
}
/* tout ceci ne sera fait qu'en cas de non-blocage */
if (lockvar == 0) {
/* reperage de goom (acceleration forte de l'acceleration du volume) */
/* -> coup de boost de la vitesse si besoin.. */
if ((accelvar > goomlimit) || (accelvar < -goomlimit)) {
goomvar++;
/*if (goomvar % 1 == 0) */
{
guint32 vtmp;
guint32 newvit;
newvit = STOP_SPEED - speedvar / 2;
/* retablir le zoom avant.. */
if ((zfd.reverse) && (!(cycle % 12)) && (rand () % 3 == 0)) {
zfd.reverse = 0;
zfd.vitesse = STOP_SPEED - 2;
lockvar = 50;
}
if (iRAND (10) == 0) {
zfd.reverse = 1;
lockvar = 100;
}
/* changement de milieu.. */
switch (iRAND (20)) {
case 0:
zfd.middleY = resoly - 1;
zfd.middleX = resolx / 2;
break;
case 1:
zfd.middleX = resolx - 1;
break;
case 2:
zfd.middleX = 1;
break;
default:
zfd.middleY = resoly / 2;
zfd.middleX = resolx / 2;
}
if (zfd.mode == WATER_MODE) {
zfd.middleX = resolx / 2;
zfd.middleY = resoly / 2;
}
switch (vtmp = (iRAND (27))) {
case 0:
zfd.vPlaneEffect = iRAND (3);
zfd.vPlaneEffect -= iRAND (3);
zfd.hPlaneEffect = iRAND (3);
zfd.hPlaneEffect -= iRAND (3);
break;
case 3:
zfd.vPlaneEffect = 0;
zfd.hPlaneEffect = iRAND (8);
zfd.hPlaneEffect -= iRAND (8);
break;
case 4:
case 5:
case 6:
case 7:
zfd.vPlaneEffect = iRAND (5);
zfd.vPlaneEffect -= iRAND (5);
zfd.hPlaneEffect = -zfd.vPlaneEffect;
break;
case 8:
zfd.hPlaneEffect = 5 + iRAND (8);
zfd.vPlaneEffect = -zfd.hPlaneEffect;
break;
case 9:
zfd.vPlaneEffect = 5 + iRAND (8);
zfd.hPlaneEffect = -zfd.hPlaneEffect;
break;
case 13:
zfd.hPlaneEffect = 0;
zfd.vPlaneEffect = iRAND (10);
zfd.vPlaneEffect -= iRAND (10);
break;
default:
if (vtmp < 10) {
zfd.vPlaneEffect = 0;
zfd.hPlaneEffect = 0;
}
}
if (iRAND (3) != 0)
zfd.noisify = 0;
else {
zfd.noisify = iRAND (3) + 2;
lockvar *= 3;
}
if (zfd.mode == AMULETTE_MODE) {
zfd.vPlaneEffect = 0;
zfd.hPlaneEffect = 0;
zfd.noisify = 0;
}
if ((zfd.middleX == 1) || (zfd.middleX == resolx - 1)) {
zfd.vPlaneEffect = 0;
zfd.hPlaneEffect = iRAND (2) ? 0 : zfd.hPlaneEffect;
}
if (newvit < zfd.vitesse) { /* on accelere */
pzfd = &zfd;
if (((newvit < STOP_SPEED - 7) &&
(zfd.vitesse < STOP_SPEED - 6) &&
(cycle % 3 == 0)) || (iRAND (40) == 0)) {
zfd.vitesse = STOP_SPEED - 1;
zfd.reverse = !zfd.reverse;
} else {
zfd.vitesse = (newvit + zfd.vitesse * 4) / 5;
}
lockvar += 50;
}
}
}
/* mode mega-lent */
if (iRAND (1000) == 0) {
/*
printf ("coup du sort...\n") ;
*/
pzfd = &zfd;
zfd.vitesse = STOP_SPEED - 1;
zfd.pertedec = 8;
zfd.sqrtperte = 16;
goomvar = 1;
lockvar += 70;
}
}
/* gros frein si la musique est calme */
if ((speedvar < 1) && (zfd.vitesse < STOP_SPEED - 4) && (cycle % 16 == 0)) {
/*
printf ("++slow part... %i\n", zfd.vitesse) ;
*/
pzfd = &zfd;
zfd.vitesse += 3;
zfd.pertedec = 8;
zfd.sqrtperte = 16;
goomvar = 0;
/*
printf ("--slow part... %i\n", zfd.vitesse) ;
*/
}
/* baisser regulierement la vitesse... */
if ((cycle % 73 == 0) && (zfd.vitesse < STOP_SPEED - 5)) {
/*
printf ("slow down...\n") ;
*/
pzfd = &zfd;
zfd.vitesse++;
}
/* arreter de decr<63>menter au bout d'un certain temps */
if ((cycle % 101 == 0) && (zfd.pertedec == 7)) {
pzfd = &zfd;
zfd.pertedec = 8;
zfd.sqrtperte = 16;
}
#ifdef VERBOSE
if (pzfd) {
printf ("GOOM: pzfd->mode = %d\n", pzfd->mode);
}
#endif
/* Zoom here ! */
zoomFilterFastRGB (p1, p2, pzfd, resolx, resoly);
/* si on est dans un goom : afficher les lignes... */
if (agoom > 15)
goom_lines
(data, ((zfd.middleX == resolx / 2) && (zfd.middleY == resoly / 2)
&& (zfd.mode != WATER_MODE))
? (lineMode / 10) : 0, p2, agoom - 15);
return_val = p2;
tmp = p1;
p1 = p2;
p2 = tmp;
/* affichage et swappage des buffers.. */
cycle++;
/* tous les 100 cycles : v<>rifier si le taux de goom est correct */
/* et le modifier sinon.. */
if (!(cycle % 100)) {
if (totalgoom > 15) {
/* printf ("less gooms\n") ; */
goomlimit++;
} else {
if ((totalgoom == 0) && (goomlimit > 1))
goomlimit--;
}
totalgoom = 0;
}
return return_val;
}
void
goom_close ()
{
if (pixel != NULL)
free (pixel);
if (back != NULL)
free (back);
pixel = back = NULL;
RAND_CLOSE ();
}