gstreamer/gst/goom/goom_core.c

#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 ((guint32)pixel) ;
    cycle = 0 ;

    p1 = (guint32 *)((1+((unsigned int)(pixel))/128)*128);
    p2 = (guint32 *)((1+((unsigned int)(back))/128)*128);
}


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);
    bzero(pixel,buffsize * sizeof(guint32) + 128);
    back = (guint32 *) malloc (buffsize * sizeof(guint32) + 128);
    bzero(back,buffsize * sizeof(guint32) + 128);
    p1 = (guint32 *)((1+((unsigned int)(pixel))/128)*128);
    p2 = (guint32 *)((1+((unsigned int)(back))/128)*128);
}


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) - iRAND(3);
                        zfd.hPlaneEffect = iRAND(3) - iRAND(3);
                        break;
                    case 3:
                        zfd.vPlaneEffect = 0 ;
                        zfd.hPlaneEffect = iRAND(8) - iRAND(8);
                        break;
                    case 4:
                    case 5:
                    case 6:
                    case 7:
                        zfd.vPlaneEffect = iRAND(5) - 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) - 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();
}