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