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/* SPUdec.c
Skeleton of function spudec_process_controll() is from xine sources.
Further works:
LGB,... (yeah, try to improve it and insert your name here! ;-) */
#include <stdio.h>
#include "spudec.h"
void spudec_process_control(unsigned char *control, int size, int* d1, int* d2)
{
int off = 2;
int a,b; /* Temporary vars */
do {
int type = control[off];
off++;
printf("cmd=%d ",type);
switch(type) {
case 0x00:
/* Menu ID, 1 byte */
printf("Menu ID\n");
break;
case 0x01:
/* Start display */
printf("Start display!\n");
// gSpudec.geom.bIsVisible = 1;
break;
case 0x03:
/* Palette */
printf("Palette\n");
// palette[3] = &(gSpudec.clut[(control[off] >> 4)]);
// palette[2] = &(gSpudec.clut[control[off] & 0xf]);
// palette[1] = &(gSpudec.clut[(control[off+1] >> 4)]);
// palette[0] = &(gSpudec.clut[control[off+1] & 0xf]);
off+=2;
break;
case 0x04:
/* Alpha */
printf("Alpha\n");
// alpha[3] = control[off] & 0xf0;
// alpha[2] = (control[off] & 0xf) << 4;
// alpha[1] = control[off+1] & 0xf0;
// alpha[0] = (control[off+1] & 0xf) << 4;
off+=2;
break;
case 0x05:
/* Co-ords */
a = (control[off] << 16) + (control[off+1] << 8) + control[off+2];
b = (control[off+3] << 16) + (control[off+4] << 8) + control[off+5];
printf("Coords col: %d - %d row: %d - %d\n",a >> 12,a & 0xfff,b >> 12,b & 0xfff);
// gSpudec.geom.start_col = a >> 12;
// gSpudec.geom.end_col = a & 0xfff;
// gSpudec.geom.start_row = b >> 12;
// gSpudec.geom.end_row = b & 0xfff;
off+=6;
break;
case 0x06:
/* Graphic lines */
*(d1) = (control[off] << 8) + control[off+1];
*(d2) = (control[off+2] << 8) + control[off+3];
printf("Graphic pos color: %d b/w: %d\n",*d1,*d2);
off+=4;
break;
case 0xff:
/* All done, bye-bye */
printf("Done!\n");
return;
break;
default:
printf("spudec: Error determining control type 0x%02x.\n",type);
return;
break;
}
/* printf("spudec: Processsed control type 0x%02x.\n",type); */
} while(off < size);
}
// SPU packet format: (guess only, by A'rpi)
// 0 word whole packet size
// 2 word x0 sub-packet size
// 4 x0-2 pixel data
// x0+2 word x1 sub-packet size
// x0+4 x1-x0-2 process control data
// x1 word lifetime
// x1+2 word x1 sub-packet size again
void spudec_decode(unsigned char *packet,int len){
int x0, x1;
int d1, d2;
int lifetime;
x0 = (packet[2] << 8) + packet[3];
x1 = (packet[x0+2] << 8) + packet[x0+3];
/* /Another/ sanity check. */
if((packet[x1+2]<<8) + packet[x1+3] != x1) {
printf("spudec: Incorrect packet.\n");
return;
}
lifetime= ((packet[x1]<<8) + packet[x1+1]);
printf("lifetime=%d\n",lifetime);
d1 = d2 = -1;
spudec_process_control(packet + x0 + 2, x1-x0-2, &d1, &d2);
// if((d1 != -1) && (d2 != -1)) {
// spudec_process_data(packet, x0, d1, d2);
// }
}
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