107 lines
2.0 KiB
C
107 lines
2.0 KiB
C
|
#include <stdio.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include "vadpcm.h"
|
||
|
|
|
||
|
|
static s32 input_word = 0;
|
||
|
|
static s32 in_bit_pos = -1;
|
||
|
|
|
||
|
|
static u32 getshort(FILE *ifile)
|
||
|
|
{
|
||
|
|
u32 c1;
|
||
|
|
u32 c2;
|
||
|
|
|
||
|
|
if ((c1 = getc(ifile)) == -1)
|
||
|
|
{
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
if ((c2 = getc(ifile)) == -1)
|
||
|
|
{
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
return (c1 << 8) | c2;
|
||
|
|
}
|
||
|
|
|
||
|
|
u32 readbits(u32 nbits, FILE *ifile)
|
||
|
|
{
|
||
|
|
u32 c;
|
||
|
|
u32 b;
|
||
|
|
u32 left;
|
||
|
|
u32 mask;
|
||
|
|
|
||
|
|
if (nbits <= in_bit_pos + 1)
|
||
|
|
{
|
||
|
|
mask = (1U << nbits) - 1;
|
||
|
|
b = ((u32) input_word >> (in_bit_pos - nbits + 1)) & mask;
|
||
|
|
in_bit_pos -= nbits;
|
||
|
|
if (in_bit_pos < 0)
|
||
|
|
{
|
||
|
|
c = getshort(ifile);
|
||
|
|
input_word = c;
|
||
|
|
in_bit_pos = 15;
|
||
|
|
}
|
||
|
|
return b;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
b = input_word & ((1U << (in_bit_pos + 1)) - 1);
|
||
|
|
left = nbits - in_bit_pos - 1;
|
||
|
|
c = getshort(ifile);
|
||
|
|
input_word = c;
|
||
|
|
in_bit_pos = 15;
|
||
|
|
b = readbits(left, ifile) | (b << left);
|
||
|
|
return b;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
char *ReadPString(FILE *ifile)
|
||
|
|
{
|
||
|
|
u8 c;
|
||
|
|
char *st;
|
||
|
|
|
||
|
|
fread(&c, 1, 1, ifile);
|
||
|
|
st = malloc(c + 1);
|
||
|
|
fread(st, c, 1, ifile);
|
||
|
|
st[c] = '\0';
|
||
|
|
if ((c & 1) == 0)
|
||
|
|
{
|
||
|
|
fread(&c, 1, 1, ifile);
|
||
|
|
}
|
||
|
|
return st;
|
||
|
|
}
|
||
|
|
|
||
|
|
s32 lookupMarker(u32 *sample, s16 loopPoint, Marker *markers, s32 nmarkers)
|
||
|
|
{
|
||
|
|
s32 i;
|
||
|
|
|
||
|
|
for (i = 0; i < nmarkers; i++)
|
||
|
|
{
|
||
|
|
if (markers[i].MarkerID == loopPoint)
|
||
|
|
{
|
||
|
|
*sample = (markers[i].positionH << 16) + markers[i].positionL;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
ALADPCMloop *readlooppoints(FILE *ifile, s16 *nloops)
|
||
|
|
{
|
||
|
|
s32 i;
|
||
|
|
ALADPCMloop *al;
|
||
|
|
|
||
|
|
fread(nloops, sizeof(s16), 1, ifile);
|
||
|
|
BSWAP16(*nloops)
|
||
|
|
al = malloc(*nloops * sizeof(ALADPCMloop));
|
||
|
|
for (i = 0; i < *nloops; i++)
|
||
|
|
{
|
||
|
|
fread(&al[i], sizeof(ALADPCMloop), 1, ifile);
|
||
|
|
BSWAP32(al[i].start)
|
||
|
|
BSWAP32(al[i].end)
|
||
|
|
BSWAP32(al[i].count)
|
||
|
|
BSWAP16_MANY(al[i].state, 16)
|
||
|
|
}
|
||
|
|
return al;
|
||
|
|
}
|