Diff: functions_dec.h

Revision:

0:5bd441b8ab2d

Child:

1:1ed97958d0f3

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/functions_dec.h	Thu Sep 22 00:04:30 2016 +0000
@@ -0,0 +1,201 @@
+/*
+ * functions_dec.h
+ *
+ *  Created on: 5/7/2016
+ *      Author: Miguel Ruiz García
+ */
+#include <SDL.h>
+//#include <windows.h>
+#include <stdio.h>
+
+
+#include <math.h>
+#ifndef FUNCTIONS_DEC_H_
+#define FUNCTIONS_DEC_H_
+
+
+
+#endif /* FUNCTIONS_DEC_H_ */
+
+
+#define PI 3.1415952
+#define WIDTH 320
+#define HEIGHT 8
+#define DEPTH 32
+#define RAIZ2 1.414214
+#define PI16 0.19635
+
+void IDCT(int matrix[8][8][3],short int f[HEIGHT][WIDTH][3],int p_fil,int p_col){
+    int i=0,j=0,u,v;
+    float cu=1,cv=1;
+    int linea,bpp;
+
+    Uint8 *pixel;
+
+
+    for(i=p_fil;i<8+p_fil;i++){
+
+
+        for(j=p_col;j<8+p_col;j++){
+            f[i][j][0]=0;
+            f[i][j][1]=0;
+            f[i][j][2]=0;
+
+
+            float dato=0.0;
+            float dato2=0.0;
+            float dato3=0.0;
+
+
+            for(u=0;u<8;u++){
+
+                for(v=0;v<8;v++){
+                    if(u==0){
+                        cu=RAIZ2/2;
+                    }
+                    else cu=1.0;
+                    if(v==0){
+                        cv=RAIZ2/2;
+
+                    }
+                    else cv=1.0;
+                    dato=(float)(cos((float)((((+j-p_col)<<1)+1)*v*PI16)));
+                    dato2=(float)(cos((float)((((i-p_fil)<<1)+1)*u*PI16)));
+                    dato3=(float)((cu*cv)/4);
+
+                    f[i][j][0]+=(short int)(dato*dato2*(matrix[u][v][0]))*dato3;//crominancia
+                    f[i][j][1]+=(short int)(dato*dato2*(matrix[u][v][1]))*dato3;//crominancia
+                    f[i][j][2]+=(short int)(dato*dato2*(matrix[u][v][2]))*dato3;//luminancia
+
+                }
+            }
+
+
+
+
+        }
+
+
+    }
+
+
+}
+
+void yuv_to_rgb(short int f[HEIGHT][WIDTH][3]){
+
+    
+    int i=0,j=0;
+
+    float r=0.0,g=0.0,b=0.0;
+    char cad[180];
+
+    int cont;
+  
+    for(i=0;i<HEIGHT;i++){
+        for(j=0;j<WIDTH;j++){
+
+
+
+            b=(f[i][j][2]-16)*1.164+(f[i][j][1]-128)*2.017;
+            g=(f[i][j][2]-16)*1.164-(f[i][j][0]-128)*0.813-(f[i][j][1]-128)*0.392;
+            r=((f[i][j][2])-16)*1.164+((f[i][j][0])-128)*1.596;
+
+        /*  r=(*(pixel+2)-16)*1.164+(*(pixel)-128)*1.793;
+            g=(*(pixel+2)-16)*1.164-(*(pixel+1)-128)*0.213-(*(pixel)-128)*0.533;
+            b=(*(pixel+2)-16)*1.164+((*(pixel+1))-128)*2.112;*/
+            if(r>255) r=255;
+            if(g>255) g=255;
+            if(b>255) b=255;
+
+            if(r<0) r=0;
+            if(g<0) g=0;
+            if(b<0) b=0;
+            
+            f[i][j][2]=(short int)r;
+            f[i][j][1]=(short int)g;
+            f[i][j][0]=(short int)b;
+        }
+
+    }
+
+
+}
+
+void zig_zag_dec(short int f[HEIGHT][WIDTH][3],short int *matrix){
+
+    int i=0,p_x=0,p_y=0;
+    int flag=0;
+    for(i=0;i<HEIGHT*WIDTH*3;i+=3){
+
+        f[p_y][p_x][0]= *(matrix+i);
+        f[p_y][p_x][1]= *(matrix+i+1);
+        f[p_y][p_x][2]= *(matrix+i+2);
+
+        if(flag==0){
+            p_x++,p_y--;
+            if(p_y<0){
+                p_y=0;
+                flag=1;
+
+            }
+            if(p_x>WIDTH-1){
+                p_x=WIDTH-1;
+                p_y+=2;
+                flag=1;
+
+
+            }
+        }
+        else{
+            p_x--,p_y++;
+            if(p_y>HEIGHT-1){
+                p_y=HEIGHT-1;
+                p_x+=2;
+                flag=0;
+
+            }
+            if(p_x<0){
+                p_x=0;
+                flag=0;
+            }
+        }
+
+
+    }
+
+
+
+}
+
+void cuantizador_dec(short int mat[HEIGHT][WIDTH][3]){
+    short int luma[8][8]={{16,11,10,16,24,40,51,61},
+                        {12,12,14,19,26,58,60,55},
+                        {14,13,16,24,40,57,69,56},
+                        {14,17,22,29,51,87,80,62},
+                        {18,22,37,56,68,109,103,77},
+                        {24,35,55,64,81,104,113,92},
+                        {49,64,78,87,103,121,120,101},
+                        {72,92,95,98,112,100,103,99}};
+    short int croma[8][8]={{17,18,24,47,99,99,99,99},
+                            {18,21,26,66,99,99,99,99},
+                            {24,26,56,99,99,99,99,99},
+                            {47,66,99,99,99,99,99,99},
+                            {99,99,99,99,99,99,99,99},
+                            {99,99,99,99,99,99,99,99},
+                            {99,99,99,99,99,99,99,99},
+                            {99,99,99,99,99,99,99,99}};
+    int i=0,x_block,y_block,j;
+    for(i=0;i<HEIGHT;i+=8){
+        for(j=0;j<WIDTH;j+=8)
+        for(x_block=i; x_block<i+8 ;x_block++){
+            for(y_block=j; y_block<j+8 ;y_block++){
+                mat[x_block][y_block][2]*=luma[x_block-i][y_block-j];
+                mat[x_block][y_block][1]*=croma[x_block-i][y_block-j];
+                mat[x_block][y_block][0]*=croma[x_block-i][y_block-j];
+            }
+        }
+    }
+
+}
+
+