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#include "../inc/demo.h"
#include "../inc/huffman.h"
#include "../inc/pack.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define CHUNK_TICK_MASK 0b10000000
#define CHUNK_TICK_KEYFRAME_MASK 0b01000000
#define CHUNK_TICK_INLINE_MASK 0b00100000
#define CHUNK_NORMAL_TYPE_MASK 0b01100000
#define CHUNK_NORMAL_SIZE_MASK 0b00011111
const unsigned char mapmagic[] = {0x6b, 0xe6, 0xda, 0x4a, 0xce, 0xbd, 0x38, 0x0c,
0x9b, 0x5b, 0x12, 0x89, 0xc8, 0x42, 0xd7, 0x80};
// TODO make version sensitive
int readdemoheader(FILE *fp, demoheader *dh)
{
if (fscanf(fp, "TWDEMO%*c%c", &dh->version) != 1)
return -1;
if (fscanf(fp, "%64c", dh->netversion) != 1)
return -2;
if (fscanf(fp, "%64c", dh->mapname) != 1)
return -3;
if (fread(dh->mapsize, 1, 4, fp) != 4)
return -4;
if (fread(dh->mapcrc, 1, 4, fp) != 4)
return -5;
if (fscanf(fp, "%8c", dh->type) != 1)
return -6;
if (fread(dh->length, 1, 4, fp) != 4)
return -7;
if (fscanf(fp, "%20c", dh->timestamp) != 1)
return -8;
printf("version: %hhu\n", dh->version);
printf("net_version: %s\n", dh->netversion);
printf("mapname: %s\n", dh->mapname);
printf("mapsize: %i\n", reverseint(dh->mapsize));
printf("mapcrc: %i\n", reverseint(dh->mapcrc));
printf("type: %s\n", dh->type);
printf("length: %i\n", reverseint(dh->length));
printf("timestamp: %s\n", dh->timestamp);
return 1;
}
int readdemotimeline(FILE *fp, demotimeline *dt)
{
if (fscanf(fp, "%260c", dt->data) != 1)
return -1;
return 1;
}
// TODO make version sensitive
int readdemomap(FILE *fp, demomap *dm, int mapsize)
{
char magicbuf[sizeof(mapmagic)];
fread(magicbuf, 1, sizeof(mapmagic), fp);
if (memcmp(magicbuf, mapmagic, sizeof(mapmagic)) != 0)
return -1;
if (fread(dm->sha256, 1, 32, fp) != 32)
return -2;
if (fread(dm->data, 1, mapsize, fp) != mapsize)
return -3;
return 1;
}
int readdemotick(FILE *fp, char chunkhead, demotick *tick, unsigned char ver)
{
tick->keyframe = (chunkhead & CHUNK_TICK_KEYFRAME_MASK);
if (ver >= 5)
{
if (chunkhead & CHUNK_TICK_INLINE_MASK)
{
tick->innline = 1;
tick->delta = (chunkhead & 0x1f); // TODO name this mask?
}
else
{
tick->innline = 0;
unsigned char tickdelta[4];
fread(tickdelta, 1, 4, fp);
tick->delta = reverseint(tickdelta);
}
}
else
{
if ((chunkhead & 0x3f) != 0) // TODO name this mask?
tick->delta = (chunkhead & 0x3f);
else
{
unsigned char tickdelta[4];
fread(tickdelta, 1, 4, fp);
}
}
return 1;
}
int readdemosnap(FILE *fp, demosnap *snap, int size)
{
unsigned char data[size];
unsigned char unpacked[1024 * 8];
fread(data, sizeof(unsigned char), size, fp);
int r = decompresshuff((char *)data, size, (char *)unpacked, 1034 * 8);
unsigned char *cp = unpacked;
snap->datasize = readint(&cp);
snap->numitems = readint(&cp);
snap->offsets = (int *)malloc(snap->numitems * sizeof(int));
snap->items = (demosnapitem *)malloc(snap->numitems * sizeof(int));
for (int i = 0; i < snap->numitems; i++)
snap->offsets[i] = readint(&cp);
for (int i = 0; i < snap->numitems; i++)
{
unsigned int item_key = (unsigned int)readint(&cp);
snap->items[i].type = (item_key >> 16) & 0xffff;
snap->items[i].id = (item_key & 0xffff);
if (i == (snap->numitems - 1))
snap->items[i].numdata = (snap->datasize - snap->offsets[i]) / 4 - 1;
else
snap->items[i].numdata = (snap->offsets[i + 1] - snap->offsets[i]) / 4 - 1;
snap->items[i].data = (int *)malloc(size * sizeof(int));
for (int y = 0; y < snap->items[i].numdata; y++)
snap->items[i].data[y] = readint(&cp);
}
return 1;
}
int readdemochunk(FILE *fp, demochunk *chunk, unsigned char ver)
{
char chunkhead;
chunkhead = (char)fgetc(fp);
if (chunkhead == EOF)
return 0;
if (chunkhead & CHUNK_TICK_MASK)
{
demotick *tick = (demotick *)malloc(sizeof(demotick));
if (readdemotick(fp, chunkhead, tick, ver))
{
chunk->type = 0;
chunk->data.tick = tick;
printf("TICK={keyframe: %d, innline: %d, delta: %d}\n", tick->keyframe, tick->innline, tick->delta);
}
else
{
printf("[ ERROR ] error while reading tick!\n");
return -1;
}
}
else
{
unsigned char type = (chunkhead & CHUNK_NORMAL_TYPE_MASK) >> 5;
short size = (chunkhead & CHUNK_NORMAL_SIZE_MASK);
if (size == 30)
size = (short)fgetc(fp);
else if (size == 31)
fread(&size, sizeof(short), 1, fp);
if (type == 1)
{
demosnap *snap = (demosnap *)malloc(sizeof(demosnap));
if (readdemosnap(fp, snap, size))
{
chunk->type = 1; // TODO make a chunk-type enum
chunk->data.snap = snap;
printf("SNAPSHOT={datasize: %d, numitems: %d, offsets: [ ", snap->datasize, snap->numitems);
for (int i = 0; i < snap->numitems; i++)
printf("%d, ", snap->offsets[i]);
printf("], items: [ ");
for (int i = 0; i < snap->numitems; i++)
{
printf("(type: %d, id: %d) { ", snap->items[i].type, snap->items[i].id);
for (int y = 0; y < snap->items[i].numdata; y++)
printf("%d, ", snap->items[i].data[y]);
printf("} ");
}
printf("]\n");
}
else
{
printf("[ ERROR ] error while reading snapshot!\n");
return -1;
}
}
else if (type == 2)
{
printf("MESSAGE={");
fseek(fp, size, SEEK_CUR);
}
else if (type == 3)
{
printf("SNAPSHOT_DELTA={");
fseek(fp, size, SEEK_CUR);
}
printf("size: %d}\n", size);
}
return 1;
}
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