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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-29 11:40:38 +00:00
409 lines
11 KiB
C
409 lines
11 KiB
C
#include <stdlib.h>
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#include <string.h>
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#include "goom_core.h"
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#include "goom_tools.h"
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#include "filters.h"
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#include "lines.h"
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/*#define VERBOSE */
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#ifdef VERBOSE
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#include <stdio.h>
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#endif
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#define STOP_SPEED 128
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/**-----------------------------------------------------**
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** SHARED DATA **
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**-----------------------------------------------------**/
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static guint32 *pixel;
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static guint32 *back;
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static guint32 *p1, *p2, *tmp;
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static guint32 cycle;
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guint32 resolx, resoly, buffsize;
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void
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goom_init (guint32 resx, guint32 resy)
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{
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#ifdef VERBOSE
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printf ("GOOM: init (%d, %d);\n", resx, resy);
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#endif
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resolx = resx;
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resoly = resy;
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buffsize = resx * resy;
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pixel = (guint32 *) malloc (buffsize * sizeof (guint32) + 128);
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back = (guint32 *) malloc (buffsize * sizeof (guint32) + 128);
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RAND_INIT (GPOINTER_TO_INT (pixel));
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cycle = 0;
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p1 = (void *) (((unsigned long) pixel + 0x7f) & (~0x7f));
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p2 = (void *) (((unsigned long) back + 0x7f) & (~0x7f));
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}
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void
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goom_set_resolution (guint32 resx, guint32 resy)
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{
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free (pixel);
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free (back);
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resolx = resx;
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resoly = resy;
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buffsize = resx * resy;
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pixel = (guint32 *) malloc (buffsize * sizeof (guint32) + 128);
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memset (pixel, 0, buffsize * sizeof (guint32) + 128);
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back = (guint32 *) malloc (buffsize * sizeof (guint32) + 128);
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memset (back, 0, buffsize * sizeof (guint32) + 128);
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p1 = (void *) (((unsigned long) pixel + 0x7f) & (~0x7f));
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p2 = (void *) (((unsigned long) back + 0x7f) & (~0x7f));
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}
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guint32 *
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goom_update (gint16 data[2][512])
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{
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static int lockvar = 0; /* pour empecher de nouveaux changements */
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static int goomvar = 0; /* boucle des gooms */
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static int totalgoom = 0; /* nombre de gooms par seconds */
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static int agoom = 0; /* un goom a eu lieu.. */
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static int loopvar = 0; /* mouvement des points */
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static int speedvar = 0; /* vitesse des particules */
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static int lineMode = 0; /* l'effet lineaire a dessiner */
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guint32 *return_val;
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guint32 pointWidth;
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guint32 pointHeight;
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int incvar; /* volume du son */
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int accelvar; /* acceleration des particules */
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int i;
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float largfactor; /* elargissement de l'intervalle d'<27>volution des points */
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static char goomlimit = 2; /* sensibilit<69> du goom */
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static ZoomFilterData zfd = {
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128, 8, 16,
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1, 1, 0, WAVE_MODE,
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0, 0, 0
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};
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ZoomFilterData *pzfd;
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/* test if the config has changed, update it if so */
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pointWidth = (resolx * 2) / 5;
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pointHeight = (resoly * 2) / 5;
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/* ! etude du signal ... */
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incvar = 0;
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for (i = 0; i < 512; i++) {
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if (incvar < data[0][i])
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incvar = data[0][i];
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}
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accelvar = incvar / 5000;
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if (speedvar > 5) {
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accelvar--;
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if (speedvar > 20)
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accelvar--;
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if (speedvar > 40)
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speedvar = 40;
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}
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accelvar--;
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speedvar += accelvar;
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if (speedvar < 0)
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speedvar = 0;
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if (speedvar > 40)
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speedvar = 40;
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/* ! calcul du deplacement des petits points ... */
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largfactor = ((float) speedvar / 40.0f + (float) incvar / 50000.0f) / 1.5f;
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if (largfactor > 1.5f)
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largfactor = 1.5f;
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for (i = 1; i * 15 <= speedvar + 15; i++) {
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loopvar += speedvar + 1;
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pointFilter (p1,
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YELLOW,
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((pointWidth - 6.0f) * largfactor + 5.0f),
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((pointHeight - 6.0f) * largfactor + 5.0f),
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i * 152.0f, 128.0f, loopvar + i * 2032);
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pointFilter (p1, ORANGE,
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((pointWidth / 2) * largfactor) / i + 10.0f * i,
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((pointHeight / 2) * largfactor) / i + 10.0f * i,
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96.0f, i * 80.0f, loopvar / i);
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pointFilter (p1, VIOLET,
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((pointHeight / 3 + 5.0f) * largfactor) / i + 10.0f * i,
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((pointHeight / 3 + 5.0f) * largfactor) / i + 10.0f * i,
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i + 122.0f, 134.0f, loopvar / i);
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pointFilter (p1, BLACK,
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((pointHeight / 3) * largfactor + 20.0f),
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((pointHeight / 3) * largfactor + 20.0f),
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58.0f, i * 66.0f, loopvar / i);
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pointFilter (p1, WHITE,
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(pointHeight * largfactor + 10.0f * i) / i,
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(pointHeight * largfactor + 10.0f * i) / i,
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66.0f, 74.0f, loopvar + i * 500);
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}
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/* par d<>faut pas de changement de zoom */
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pzfd = NULL;
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/* diminuer de 1 le temps de lockage */
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/* note pour ceux qui n'ont pas suivis : le lockvar permet d'empecher un */
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/* changement d'etat du plugins juste apres un autre changement d'etat. oki ? */
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if (--lockvar < 0)
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lockvar = 0;
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/* temps du goom */
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if (--agoom < 0)
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agoom = 0;
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/* on verifie qu'il ne se pas un truc interressant avec le son. */
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if ((accelvar > goomlimit) || (accelvar < -goomlimit)) {
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/* UN GOOM !!! YAHOO ! */
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totalgoom++;
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agoom = 20; /* mais pdt 20 cycles, il n'y en aura plus. */
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lineMode = (lineMode + 1) % 20; /* Tous les 10 gooms on change de mode lineaire */
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/* changement eventuel de mode */
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switch (iRAND (10)) {
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case 0:
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case 1:
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case 2:
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zfd.mode = WAVE_MODE;
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zfd.vitesse = STOP_SPEED - 1;
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zfd.reverse = 0;
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break;
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case 3:
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case 4:
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zfd.mode = CRYSTAL_BALL_MODE;
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break;
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case 5:
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zfd.mode = AMULETTE_MODE;
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break;
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case 6:
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zfd.mode = WATER_MODE;
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break;
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case 7:
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zfd.mode = SCRUNCH_MODE;
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break;
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default:
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zfd.mode = NORMAL_MODE;
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}
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}
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/* tout ceci ne sera fait qu'en cas de non-blocage */
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if (lockvar == 0) {
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/* reperage de goom (acceleration forte de l'acceleration du volume) */
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/* -> coup de boost de la vitesse si besoin.. */
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if ((accelvar > goomlimit) || (accelvar < -goomlimit)) {
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goomvar++;
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/*if (goomvar % 1 == 0) */
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{
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guint32 vtmp;
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guint32 newvit;
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newvit = STOP_SPEED - speedvar / 2;
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/* retablir le zoom avant.. */
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if ((zfd.reverse) && (!(cycle % 12)) && (rand () % 3 == 0)) {
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zfd.reverse = 0;
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zfd.vitesse = STOP_SPEED - 2;
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lockvar = 50;
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}
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if (iRAND (10) == 0) {
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zfd.reverse = 1;
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lockvar = 100;
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}
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/* changement de milieu.. */
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switch (iRAND (20)) {
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case 0:
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zfd.middleY = resoly - 1;
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zfd.middleX = resolx / 2;
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break;
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case 1:
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zfd.middleX = resolx - 1;
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break;
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case 2:
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zfd.middleX = 1;
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break;
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default:
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zfd.middleY = resoly / 2;
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zfd.middleX = resolx / 2;
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}
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if (zfd.mode == WATER_MODE) {
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zfd.middleX = resolx / 2;
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zfd.middleY = resoly / 2;
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}
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switch (vtmp = (iRAND (27))) {
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case 0:
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zfd.vPlaneEffect = iRAND (3);
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zfd.vPlaneEffect -= iRAND (3);
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zfd.hPlaneEffect = iRAND (3);
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zfd.hPlaneEffect -= iRAND (3);
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break;
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case 3:
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zfd.vPlaneEffect = 0;
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zfd.hPlaneEffect = iRAND (8);
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zfd.hPlaneEffect -= iRAND (8);
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break;
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case 4:
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case 5:
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case 6:
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case 7:
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zfd.vPlaneEffect = iRAND (5);
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zfd.vPlaneEffect -= iRAND (5);
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zfd.hPlaneEffect = -zfd.vPlaneEffect;
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break;
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case 8:
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zfd.hPlaneEffect = 5 + iRAND (8);
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zfd.vPlaneEffect = -zfd.hPlaneEffect;
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break;
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case 9:
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zfd.vPlaneEffect = 5 + iRAND (8);
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zfd.hPlaneEffect = -zfd.hPlaneEffect;
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break;
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case 13:
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zfd.hPlaneEffect = 0;
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zfd.vPlaneEffect = iRAND (10);
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zfd.vPlaneEffect -= iRAND (10);
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break;
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default:
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if (vtmp < 10) {
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zfd.vPlaneEffect = 0;
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zfd.hPlaneEffect = 0;
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}
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}
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if (iRAND (3) != 0)
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zfd.noisify = 0;
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else {
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zfd.noisify = iRAND (3) + 2;
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lockvar *= 3;
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}
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if (zfd.mode == AMULETTE_MODE) {
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zfd.vPlaneEffect = 0;
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zfd.hPlaneEffect = 0;
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zfd.noisify = 0;
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}
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if ((zfd.middleX == 1) || (zfd.middleX == resolx - 1)) {
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zfd.vPlaneEffect = 0;
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zfd.hPlaneEffect = iRAND (2) ? 0 : zfd.hPlaneEffect;
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}
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if (newvit < zfd.vitesse) { /* on accelere */
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pzfd = &zfd;
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if (((newvit < STOP_SPEED - 7) &&
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(zfd.vitesse < STOP_SPEED - 6) &&
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(cycle % 3 == 0)) || (iRAND (40) == 0)) {
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zfd.vitesse = STOP_SPEED - 1;
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zfd.reverse = !zfd.reverse;
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} else {
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zfd.vitesse = (newvit + zfd.vitesse * 4) / 5;
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}
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lockvar += 50;
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}
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}
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}
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/* mode mega-lent */
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if (iRAND (1000) == 0) {
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/*
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printf ("coup du sort...\n") ;
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*/
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pzfd = &zfd;
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zfd.vitesse = STOP_SPEED - 1;
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zfd.pertedec = 8;
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zfd.sqrtperte = 16;
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goomvar = 1;
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lockvar += 70;
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}
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}
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/* gros frein si la musique est calme */
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if ((speedvar < 1) && (zfd.vitesse < STOP_SPEED - 4) && (cycle % 16 == 0)) {
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/*
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printf ("++slow part... %i\n", zfd.vitesse) ;
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*/
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pzfd = &zfd;
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zfd.vitesse += 3;
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zfd.pertedec = 8;
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zfd.sqrtperte = 16;
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goomvar = 0;
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/*
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printf ("--slow part... %i\n", zfd.vitesse) ;
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*/
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}
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/* baisser regulierement la vitesse... */
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if ((cycle % 73 == 0) && (zfd.vitesse < STOP_SPEED - 5)) {
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/*
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printf ("slow down...\n") ;
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*/
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pzfd = &zfd;
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zfd.vitesse++;
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}
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/* arreter de decr<63>menter au bout d'un certain temps */
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if ((cycle % 101 == 0) && (zfd.pertedec == 7)) {
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pzfd = &zfd;
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zfd.pertedec = 8;
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zfd.sqrtperte = 16;
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}
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#ifdef VERBOSE
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if (pzfd) {
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printf ("GOOM: pzfd->mode = %d\n", pzfd->mode);
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}
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#endif
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/* Zoom here ! */
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zoomFilterFastRGB (p1, p2, pzfd, resolx, resoly);
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/* si on est dans un goom : afficher les lignes... */
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if (agoom > 15)
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goom_lines
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(data, ((zfd.middleX == resolx / 2) && (zfd.middleY == resoly / 2)
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&& (zfd.mode != WATER_MODE))
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? (lineMode / 10) : 0, p2, agoom - 15);
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return_val = p2;
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tmp = p1;
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p1 = p2;
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p2 = tmp;
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/* affichage et swappage des buffers.. */
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cycle++;
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/* tous les 100 cycles : v<>rifier si le taux de goom est correct */
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/* et le modifier sinon.. */
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if (!(cycle % 100)) {
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if (totalgoom > 15) {
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/* printf ("less gooms\n") ; */
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goomlimit++;
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} else {
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if ((totalgoom == 0) && (goomlimit > 1))
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goomlimit--;
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}
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totalgoom = 0;
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}
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return return_val;
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}
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void
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goom_close ()
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{
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if (pixel != NULL)
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free (pixel);
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if (back != NULL)
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free (back);
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pixel = back = NULL;
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RAND_CLOSE ();
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}
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