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Club Amiga de Montreal - CAM
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CAM_CD_1.iso
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369a.lha
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n2a
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n2a.c
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C/C++ Source or Header
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1990-03-06
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3KB
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117 lines
#include <stdio.h>
#include <math.h>
#ifdef AMIGA
#include <exec/types.h>
#else
typedef long LONG;
typedef unsigned long ULONG;
typedef unsigned char UBYTE;
typedef unsigned short UWORD;
#endif
#define MAGIC 0x2e736e64
#define LINEAR_16 3
#define Unity 0x10000L
typedef LONG Fixed;
typedef struct {
ULONG oneShotHiSamples,
repeatHiSamples,
samplesPerHiCycle;
UWORD samplesPerSec;
UBYTE ctOctave,
sCompression;
Fixed volume;
} Voice8Header;
main(int argc, char *argv[])
{
Voice8Header v;
long i, nsamples, voffset, lengthoffset, nsamplesoffset;
int magic, offset, size, format, rate, nchannels;
unsigned short s16;
FILE *in, *out;
unsigned char s8;
if (argc != 3) {
fprintf(stderr, "Usage: %s sndfile 8svxfile\n", argv[0]);
exit(1);
}
in = fopen(argv[1], "r");
if (!in) {
fprintf(stderr, "Can't open %s!\n", argv[1]);
exit(1);
}
fread((void *)&magic, sizeof(magic), 1, in);
fread((void *)&offset, sizeof(offset), 1, in);
fread((void *)&size, sizeof(size), 1, in);
fread((void *)&format, sizeof(format), 1, in);
fread((void *)&rate, sizeof(rate), 1, in);
fread((void *)&nchannels, sizeof(nchannels), 1, in);
if (magic != MAGIC) {
fprintf(stderr, "%s Is not a NeXT sound file!\n", argv[1]);
fclose(in);
exit(1);
}
if (format != LINEAR_16 || nchannels != 1) {
fprintf(stderr, "I can only handle linear 16 format with 1 channel!\n");
if (format != LINEAR_16 && nchannels == 1) {
fprintf(stderr, "Use sndconvert on the NeXT to convert to this format\n");
}
fclose(in);
exit(1);
}
out = fopen(argv[2], "w");
if (!out) {
fprintf(stderr, "Can't open %s!\n", argv[2]);
fclose(in);
exit(1);
}
fwrite((void *)"FORM", sizeof(char), 4, out);
lengthoffset = ftell(out);
i = 0; /* update this later */
fwrite((void *)&i, sizeof(i), 1, out);
fwrite((void *)"8SVX", sizeof(char), 4, out);
fwrite((void *)"VHDR", sizeof(char), 4, out);
i = 20;
fwrite((void *)&i, sizeof(i), 1, out);
voffset = ftell(out);
v.oneShotHiSamples = 0; /* Update this later */
v.repeatHiSamples = 0;
v.samplesPerHiCycle = 0;
v.samplesPerSec = rate;
v.ctOctave = 1;
v.sCompression = 0;
v.volume = Unity;
fwrite((void *)&v, sizeof(v), 1, out);
fwrite((void *)"BODY", sizeof(char), 4, out);
nsamplesoffset = ftell(out);
i = 0; /* update this later */
fwrite((void *)&i, sizeof(i), 1, out);
fseek(in, (long)offset, 0);
nsamples = 0;
while (fread((void *)&s16, sizeof(s16), 1, in)) {
s8 = s16 >> 8;
fwrite((void *)&s8, sizeof(s8), 1, out);
nsamples++;
}
fclose(in);
if (nsamples % 2) {
s8 = 0;
fwrite((void *)&s8, sizeof(s8), 1, out); /* pad to even length */
}
fseek(out, voffset, 0);
v.oneShotHiSamples = nsamples;
fwrite((void *)&v, sizeof(v), 1, out);
fseek(out, lengthoffset, 0);
i = 40 + nsamples;
fwrite((void *)&i, sizeof(i), 1, out);
fseek(out, nsamplesoffset, 0);
fwrite((void *)&nsamples, sizeof(nsamples), 1, out);
fclose(out);
exit(0);
}