mirror of
https://github.com/farisawan-2000/kirby64.git
synced 2024-11-26 22:50:43 +00:00
670 lines
19 KiB
C
670 lines
19 KiB
C
/**
|
|
* Bruteforcing decoder for converting ADPCM-encoded AIFC into AIFF, in a way
|
|
* that roundtrips with vadpcm_enc.
|
|
*/
|
|
#include <unistd.h>
|
|
#include <assert.h>
|
|
#include <math.h>
|
|
#include <string.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <stdarg.h>
|
|
|
|
typedef signed char s8;
|
|
typedef short s16;
|
|
typedef int s32;
|
|
typedef unsigned char u8;
|
|
typedef unsigned short u16;
|
|
typedef unsigned int u32;
|
|
typedef unsigned long long u64;
|
|
typedef float f32;
|
|
|
|
#define bswap16(x) __builtin_bswap16(x)
|
|
#define bswap32(x) __builtin_bswap32(x)
|
|
#define BSWAP16(x) x = __builtin_bswap16(x)
|
|
#define BSWAP32(x) x = __builtin_bswap32(x)
|
|
#define BSWAP16_MANY(x, n) for (s32 _i = 0; _i < n; _i++) BSWAP16((x)[_i])
|
|
|
|
#define NORETURN __attribute__((noreturn))
|
|
#define UNUSED __attribute__((unused))
|
|
|
|
typedef struct {
|
|
u32 ckID;
|
|
u32 ckSize;
|
|
} ChunkHeader;
|
|
|
|
typedef struct {
|
|
u32 ckID;
|
|
u32 ckSize;
|
|
u32 formType;
|
|
} Chunk;
|
|
|
|
typedef struct {
|
|
s16 numChannels;
|
|
u16 numFramesH;
|
|
u16 numFramesL;
|
|
s16 sampleSize;
|
|
s16 sampleRate[5]; // 80-bit float
|
|
u16 compressionTypeH;
|
|
u16 compressionTypeL;
|
|
} CommonChunk;
|
|
|
|
typedef struct {
|
|
s16 MarkerID;
|
|
u16 positionH;
|
|
u16 positionL;
|
|
} Marker;
|
|
|
|
typedef struct {
|
|
s16 playMode;
|
|
s16 beginLoop;
|
|
s16 endLoop;
|
|
} Loop;
|
|
|
|
typedef struct {
|
|
s8 baseNote;
|
|
s8 detune;
|
|
s8 lowNote;
|
|
s8 highNote;
|
|
s8 lowVelocity;
|
|
s8 highVelocity;
|
|
s16 gain;
|
|
Loop sustainLoop;
|
|
Loop releaseLoop;
|
|
} InstrumentChunk;
|
|
|
|
typedef struct {
|
|
s32 offset;
|
|
s32 blockSize;
|
|
} SoundDataChunk;
|
|
|
|
typedef struct {
|
|
s16 version;
|
|
s16 order;
|
|
s16 nEntries;
|
|
} CodeChunk;
|
|
|
|
typedef struct
|
|
{
|
|
u32 start;
|
|
u32 end;
|
|
u32 count;
|
|
s16 state[16];
|
|
} ALADPCMloop;
|
|
|
|
|
|
static char usage[] = "input.aifc output.aiff";
|
|
static const char *progname, *infilename;
|
|
|
|
#define checked_fread(a, b, c, d) if (fread(a, b, c, d) != c) fail_parse("error parsing file")
|
|
|
|
NORETURN
|
|
void fail_parse(const char *fmt, ...)
|
|
{
|
|
char *formatted = NULL;
|
|
va_list ap;
|
|
va_start(ap, fmt);
|
|
int size = vsnprintf(NULL, 0, fmt, ap);
|
|
va_end(ap);
|
|
if (size >= 0) {
|
|
size++;
|
|
formatted = malloc(size);
|
|
if (formatted != NULL) {
|
|
va_start(ap, fmt);
|
|
size = vsnprintf(formatted, size, fmt, ap);
|
|
va_end(ap);
|
|
if (size < 0) {
|
|
free(formatted);
|
|
formatted = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (formatted != NULL) {
|
|
fprintf(stderr, "%s: %s [%s]\n", progname, formatted, infilename);
|
|
free(formatted);
|
|
}
|
|
exit(1);
|
|
}
|
|
|
|
s32 myrand()
|
|
{
|
|
static u64 state = 1619236481962341ULL;
|
|
state *= 3123692312231ULL;
|
|
state++;
|
|
return state >> 33;
|
|
}
|
|
|
|
s16 qsample(s32 x, s32 scale)
|
|
{
|
|
// Compute x / 2^scale rounded to the nearest integer, breaking ties towards zero.
|
|
if (scale == 0) return x;
|
|
return (x + (1 << (scale - 1)) - (x > 0)) >> scale;
|
|
}
|
|
|
|
s16 clamp_to_s16(s32 x)
|
|
{
|
|
if (x < -0x8000) return -0x8000;
|
|
if (x > 0x7fff) return 0x7fff;
|
|
return (s16) x;
|
|
}
|
|
|
|
s32 toi4(s32 x)
|
|
{
|
|
if (x >= 8) return x - 16;
|
|
return x;
|
|
}
|
|
|
|
s32 readaifccodebook(FILE *fhandle, s32 ****table, s16 *order, s16 *npredictors)
|
|
{
|
|
checked_fread(order, sizeof(s16), 1, fhandle);
|
|
BSWAP16(*order);
|
|
checked_fread(npredictors, sizeof(s16), 1, fhandle);
|
|
BSWAP16(*npredictors);
|
|
*table = malloc(*npredictors * sizeof(s32 **));
|
|
for (s32 i = 0; i < *npredictors; i++) {
|
|
(*table)[i] = malloc(8 * sizeof(s32 *));
|
|
for (s32 j = 0; j < 8; j++) {
|
|
(*table)[i][j] = malloc((*order + 8) * sizeof(s32));
|
|
}
|
|
}
|
|
|
|
for (s32 i = 0; i < *npredictors; i++) {
|
|
s32 **table_entry = (*table)[i];
|
|
for (s32 j = 0; j < *order; j++) {
|
|
for (s32 k = 0; k < 8; k++) {
|
|
s16 ts;
|
|
checked_fread(&ts, sizeof(s16), 1, fhandle);
|
|
BSWAP16(ts);
|
|
table_entry[k][j] = ts;
|
|
}
|
|
}
|
|
|
|
for (s32 k = 1; k < 8; k++) {
|
|
table_entry[k][*order] = table_entry[k - 1][*order - 1];
|
|
}
|
|
|
|
table_entry[0][*order] = 1 << 11;
|
|
|
|
for (s32 k = 1; k < 8; k++) {
|
|
s32 j = 0;
|
|
for (; j < k; j++) {
|
|
table_entry[j][k + *order] = 0;
|
|
}
|
|
|
|
for (; j < 8; j++) {
|
|
table_entry[j][k + *order] = table_entry[j - k][*order];
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
ALADPCMloop *readlooppoints(FILE *ifile, s16 *nloops)
|
|
{
|
|
checked_fread(nloops, sizeof(s16), 1, ifile);
|
|
BSWAP16(*nloops);
|
|
ALADPCMloop *al = malloc(*nloops * sizeof(ALADPCMloop));
|
|
for (s32 i = 0; i < *nloops; i++) {
|
|
checked_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;
|
|
}
|
|
|
|
s32 inner_product(s32 length, s32 *v1, s32 *v2)
|
|
{
|
|
s32 out = 0;
|
|
for (s32 i = 0; i < length; i++) {
|
|
out += v1[i] * v2[i];
|
|
}
|
|
|
|
// Compute "out / 2^11", rounded down.
|
|
s32 dout = out / (1 << 11);
|
|
s32 fiout = dout * (1 << 11);
|
|
return dout - (out - fiout < 0);
|
|
}
|
|
|
|
void my_decodeframe(u8 *frame, s32 *state, s32 order, s32 ***coefTable)
|
|
{
|
|
s32 ix[16];
|
|
|
|
u8 header = frame[0];
|
|
s32 scale = 1 << (header >> 4);
|
|
s32 optimalp = header & 0xf;
|
|
|
|
for (s32 i = 0; i < 16; i += 2) {
|
|
u8 c = frame[1 + i/2];
|
|
ix[i] = c >> 4;
|
|
ix[i + 1] = c & 0xf;
|
|
}
|
|
|
|
for (s32 i = 0; i < 16; i++) {
|
|
if (ix[i] >= 8) ix[i] -= 16;
|
|
ix[i] *= scale;
|
|
}
|
|
|
|
for (s32 j = 0; j < 2; j++) {
|
|
s32 in_vec[16];
|
|
if (j == 0) {
|
|
for (s32 i = 0; i < order; i++) {
|
|
in_vec[i] = state[16 - order + i];
|
|
}
|
|
} else {
|
|
for (s32 i = 0; i < order; i++) {
|
|
in_vec[i] = state[8 - order + i];
|
|
}
|
|
}
|
|
|
|
for (s32 i = 0; i < 8; i++) {
|
|
s32 ind = j * 8 + i;
|
|
in_vec[order + i] = ix[ind];
|
|
state[ind] = inner_product(order + i, coefTable[optimalp][i], in_vec) + ix[ind];
|
|
}
|
|
}
|
|
}
|
|
|
|
void my_encodeframe(u8 *out, s16 *inBuffer, s32 *state, s32 ***coefTable, s32 order, s32 npredictors)
|
|
{
|
|
s16 ix[16];
|
|
s32 prediction[16];
|
|
s32 inVector[16];
|
|
s32 saveState[16];
|
|
s32 optimalp = 0;
|
|
s32 scale;
|
|
s32 ie[16];
|
|
s32 e[16];
|
|
f32 min = 1e30;
|
|
|
|
for (s32 k = 0; k < npredictors; k++) {
|
|
for (s32 j = 0; j < 2; j++) {
|
|
for (s32 i = 0; i < order; i++) {
|
|
inVector[i] = (j == 0 ? state[16 - order + i] : inBuffer[8 - order + i]);
|
|
}
|
|
|
|
for (s32 i = 0; i < 8; i++) {
|
|
prediction[j * 8 + i] = inner_product(order + i, coefTable[k][i], inVector);
|
|
e[j * 8 + i] = inVector[i + order] = inBuffer[j * 8 + i] - prediction[j * 8 + i];
|
|
}
|
|
}
|
|
|
|
f32 se = 0.0f;
|
|
for (s32 j = 0; j < 16; j++) {
|
|
se += (f32) e[j] * (f32) e[j];
|
|
}
|
|
|
|
if (se < min) {
|
|
min = se;
|
|
optimalp = k;
|
|
}
|
|
}
|
|
|
|
for (s32 j = 0; j < 2; j++) {
|
|
for (s32 i = 0; i < order; i++) {
|
|
inVector[i] = (j == 0 ? state[16 - order + i] : inBuffer[8 - order + i]);
|
|
}
|
|
|
|
for (s32 i = 0; i < 8; i++) {
|
|
prediction[j * 8 + i] = inner_product(order + i, coefTable[optimalp][i], inVector);
|
|
e[j * 8 + i] = inVector[i + order] = inBuffer[j * 8 + i] - prediction[j * 8 + i];
|
|
}
|
|
}
|
|
|
|
for (s32 i = 0; i < 16; i++) {
|
|
ie[i] = clamp_to_s16(e[i]);
|
|
}
|
|
|
|
s32 max = 0;
|
|
for (s32 i = 0; i < 16; i++) {
|
|
if (abs(ie[i]) > abs(max)) {
|
|
max = ie[i];
|
|
}
|
|
}
|
|
|
|
for (scale = 0; scale <= 12; scale++) {
|
|
if (max <= 7 && max >= -8) break;
|
|
max /= 2;
|
|
}
|
|
|
|
for (s32 i = 0; i < 16; i++) {
|
|
saveState[i] = state[i];
|
|
}
|
|
|
|
for (s32 nIter = 0, again = 1; nIter < 2 && again; nIter++) {
|
|
again = 0;
|
|
if (nIter == 1) scale++;
|
|
if (scale > 12) {
|
|
scale = 12;
|
|
}
|
|
|
|
for (s32 j = 0; j < 2; j++) {
|
|
s32 base = j * 8;
|
|
for (s32 i = 0; i < order; i++) {
|
|
inVector[i] = (j == 0 ?
|
|
saveState[16 - order + i] : state[8 - order + i]);
|
|
}
|
|
|
|
for (s32 i = 0; i < 8; i++) {
|
|
prediction[base + i] = inner_product(order + i, coefTable[optimalp][i], inVector);
|
|
s32 se = inBuffer[base + i] - prediction[base + i];
|
|
ix[base + i] = qsample(se, scale);
|
|
s32 cV = clamp_to_s16(ix[base + i]) - ix[base + i];
|
|
if (cV > 1 || cV < -1) again = 1;
|
|
ix[base + i] += cV;
|
|
inVector[i + order] = ix[base + i] * (1 << scale);
|
|
state[base + i] = prediction[base + i] + inVector[i + order];
|
|
}
|
|
}
|
|
}
|
|
|
|
u8 header = (scale << 4) | (optimalp & 0xf);
|
|
out[0] = header;
|
|
for (s32 i = 0; i < 16; i += 2) {
|
|
u8 c = ((ix[i] & 0xf) << 4) | (ix[i + 1] & 0xf);
|
|
out[1 + i/2] = c;
|
|
}
|
|
}
|
|
|
|
void permute(s16 *out, s32 *in, s32 scale)
|
|
{
|
|
for (s32 i = 0; i < 16; i++) {
|
|
out[i] = clamp_to_s16(in[i] - scale / 2 + myrand() % (scale + 1));
|
|
}
|
|
}
|
|
|
|
void write_header(FILE *ofile, const char *id, s32 size)
|
|
{
|
|
fwrite(id, 4, 1, ofile);
|
|
BSWAP32(size);
|
|
fwrite(&size, sizeof(s32), 1, ofile);
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
s16 order = -1;
|
|
s16 nloops = 0;
|
|
ALADPCMloop *aloops = NULL;
|
|
s16 npredictors = -1;
|
|
s32 ***coefTable = NULL;
|
|
s32 state[16];
|
|
s32 soundPointer = -1;
|
|
s32 currPos = 0;
|
|
s32 nSamples = 0;
|
|
Chunk FormChunk;
|
|
ChunkHeader Header;
|
|
CommonChunk CommChunk;
|
|
InstrumentChunk InstChunk;
|
|
SoundDataChunk SndDChunk;
|
|
FILE *ifile;
|
|
FILE *ofile;
|
|
progname = argv[0];
|
|
|
|
if (argc < 3) {
|
|
fprintf(stderr, "%s %s\n", progname, usage);
|
|
exit(1);
|
|
}
|
|
|
|
infilename = argv[1];
|
|
|
|
if ((ifile = fopen(infilename, "rb")) == NULL) {
|
|
fail_parse("AIFF-C file could not be opened");
|
|
exit(1);
|
|
}
|
|
|
|
if ((ofile = fopen(argv[2], "wb")) == NULL) {
|
|
fprintf(stderr, "%s: output file could not be opened [%s]\n", progname, argv[2]);
|
|
exit(1);
|
|
}
|
|
|
|
memset(&InstChunk, 0, sizeof(InstChunk));
|
|
|
|
checked_fread(&FormChunk, sizeof(FormChunk), 1, ifile);
|
|
BSWAP32(FormChunk.ckID);
|
|
BSWAP32(FormChunk.formType);
|
|
if ((FormChunk.ckID != 0x464f524d) || (FormChunk.formType != 0x41494643)) { // FORM, AIFC
|
|
fail_parse("not an AIFF-C file");
|
|
}
|
|
|
|
for (;;) {
|
|
s32 num = fread(&Header, sizeof(Header), 1, ifile);
|
|
u32 ts;
|
|
if (num <= 0) break;
|
|
BSWAP32(Header.ckID);
|
|
BSWAP32(Header.ckSize);
|
|
|
|
Header.ckSize++;
|
|
Header.ckSize &= ~1;
|
|
s32 offset = ftell(ifile);
|
|
|
|
switch (Header.ckID) {
|
|
case 0x434f4d4d: // COMM
|
|
checked_fread(&CommChunk, sizeof(CommChunk), 1, ifile);
|
|
BSWAP16(CommChunk.numChannels);
|
|
BSWAP16(CommChunk.numFramesH);
|
|
BSWAP16(CommChunk.numFramesL);
|
|
BSWAP16(CommChunk.sampleSize);
|
|
BSWAP16(CommChunk.compressionTypeH);
|
|
BSWAP16(CommChunk.compressionTypeL);
|
|
s32 cType = (CommChunk.compressionTypeH << 16) + CommChunk.compressionTypeL;
|
|
if (cType != 0x56415043) { // VAPC
|
|
fail_parse("file is of the wrong compression type");
|
|
}
|
|
if (CommChunk.numChannels != 1) {
|
|
fail_parse("file contains %d channels, only 1 channel supported", CommChunk.numChannels);
|
|
}
|
|
if (CommChunk.sampleSize != 16) {
|
|
fail_parse("file contains %d bit samples, only 16 bit samples supported", CommChunk.sampleSize);
|
|
}
|
|
|
|
nSamples = (CommChunk.numFramesH << 16) + CommChunk.numFramesL;
|
|
|
|
// Allow broken input lengths
|
|
if (nSamples % 16) {
|
|
nSamples--;
|
|
}
|
|
|
|
if (nSamples % 16 != 0) {
|
|
fail_parse("number of chunks must be a multiple of 16, found %d", nSamples);
|
|
}
|
|
break;
|
|
|
|
case 0x53534e44: // SSND
|
|
checked_fread(&SndDChunk, sizeof(SndDChunk), 1, ifile);
|
|
BSWAP32(SndDChunk.offset);
|
|
BSWAP32(SndDChunk.blockSize);
|
|
assert(SndDChunk.offset == 0);
|
|
assert(SndDChunk.blockSize == 0);
|
|
soundPointer = ftell(ifile);
|
|
break;
|
|
|
|
case 0x4150504c: // APPL
|
|
checked_fread(&ts, sizeof(u32), 1, ifile);
|
|
BSWAP32(ts);
|
|
if (ts == 0x73746f63) { // stoc
|
|
u8 len;
|
|
checked_fread(&len, 1, 1, ifile);
|
|
if (len == 11) {
|
|
char ChunkName[12];
|
|
s16 version;
|
|
checked_fread(ChunkName, 11, 1, ifile);
|
|
ChunkName[11] = '\0';
|
|
if (strcmp("VADPCMCODES", ChunkName) == 0) {
|
|
checked_fread(&version, sizeof(s16), 1, ifile);
|
|
BSWAP16(version);
|
|
if (version != 1) {
|
|
fail_parse("Unknown codebook chunk version");
|
|
}
|
|
readaifccodebook(ifile, &coefTable, &order, &npredictors);
|
|
}
|
|
else if (strcmp("VADPCMLOOPS", ChunkName) == 0) {
|
|
checked_fread(&version, sizeof(s16), 1, ifile);
|
|
BSWAP16(version);
|
|
if (version != 1) {
|
|
fail_parse("Unknown loop chunk version");
|
|
}
|
|
aloops = readlooppoints(ifile, &nloops);
|
|
if (nloops != 1) {
|
|
fail_parse("Only a single loop supported");
|
|
}
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
|
|
fseek(ifile, offset + Header.ckSize, SEEK_SET);
|
|
}
|
|
|
|
if (coefTable == NULL) {
|
|
fail_parse("Codebook missing from bitstream");
|
|
}
|
|
|
|
for (s32 i = 0; i < order; i++) {
|
|
state[15 - i] = 0;
|
|
}
|
|
|
|
u32 outputBytes = nSamples * sizeof(s16);
|
|
u8 *outputBuf = malloc(outputBytes);
|
|
|
|
fseek(ifile, soundPointer, SEEK_SET);
|
|
while (currPos < nSamples) {
|
|
u8 input[9];
|
|
u8 encoded[9];
|
|
s32 lastState[16];
|
|
s32 decoded[16];
|
|
s16 guess[16];
|
|
s16 origGuess[16];
|
|
|
|
memcpy(lastState, state, sizeof(lastState));
|
|
checked_fread(input, 9, 1, ifile);
|
|
|
|
// Decode for real
|
|
my_decodeframe(input, state, order, coefTable);
|
|
memcpy(decoded, state, sizeof(lastState));
|
|
|
|
// Create a guess from that, by clamping to 16 bits
|
|
for (s32 i = 0; i < 16; i++) {
|
|
origGuess[i] = clamp_to_s16(state[i]);
|
|
}
|
|
|
|
// Encode the guess
|
|
memcpy(state, lastState, sizeof(lastState));
|
|
memcpy(guess, origGuess, sizeof(guess));
|
|
my_encodeframe(encoded, guess, state, coefTable, order, npredictors);
|
|
|
|
// If it doesn't match, randomly round numbers until it does.
|
|
if (memcmp(input, encoded, 9) != 0) {
|
|
s32 scale = 1 << (input[0] >> 4);
|
|
do {
|
|
permute(guess, decoded, scale);
|
|
memcpy(state, lastState, sizeof(lastState));
|
|
my_encodeframe(encoded, guess, state, coefTable, order, npredictors);
|
|
} while (memcmp(input, encoded, 9) != 0);
|
|
|
|
// Bring the matching closer to the original decode (not strictly
|
|
// necessary, but it will move us closer to the target on average).
|
|
for (s32 failures = 0; failures < 50; failures++) {
|
|
s32 ind = myrand() % 16;
|
|
s32 old = guess[ind];
|
|
if (old == origGuess[ind]) continue;
|
|
guess[ind] = origGuess[ind];
|
|
if (myrand() % 2) guess[ind] += (old - origGuess[ind]) / 2;
|
|
memcpy(state, lastState, sizeof(lastState));
|
|
my_encodeframe(encoded, guess, state, coefTable, order, npredictors);
|
|
if (memcmp(input, encoded, 9) == 0) {
|
|
failures = -1;
|
|
}
|
|
else {
|
|
guess[ind] = old;
|
|
}
|
|
}
|
|
}
|
|
|
|
memcpy(state, decoded, sizeof(lastState));
|
|
BSWAP16_MANY(guess, 16);
|
|
memcpy(outputBuf + currPos * 2, guess, sizeof(guess));
|
|
currPos += 16;
|
|
}
|
|
|
|
// Write an incomplete file header. We'll fill in the size later.
|
|
fwrite("FORM\0\0\0\0AIFF", 12, 1, ofile);
|
|
|
|
// Subtract 4 from the COMM size to skip the compression field.
|
|
write_header(ofile, "COMM", sizeof(CommonChunk) - 4);
|
|
CommChunk.numFramesH = nSamples >> 16;
|
|
CommChunk.numFramesL = nSamples & 0xffff;
|
|
BSWAP16(CommChunk.numChannels);
|
|
BSWAP16(CommChunk.numFramesH);
|
|
BSWAP16(CommChunk.numFramesL);
|
|
BSWAP16(CommChunk.sampleSize);
|
|
fwrite(&CommChunk, sizeof(CommonChunk) - 4, 1, ofile);
|
|
|
|
if (nloops > 0) {
|
|
s32 startPos = aloops[0].start, endPos = aloops[0].end;
|
|
const char *markerNames[2] = {"start", "end"};
|
|
Marker markers[2] = {
|
|
{1, startPos >> 16, startPos & 0xffff},
|
|
{2, endPos >> 16, endPos & 0xffff}
|
|
};
|
|
write_header(ofile, "MARK", 2 + 2 * sizeof(Marker) + 1 + 5 + 1 + 3);
|
|
s16 numMarkers = bswap16(2);
|
|
fwrite(&numMarkers, sizeof(s16), 1, ofile);
|
|
for (s32 i = 0; i < 2; i++) {
|
|
u8 len = (u8) strlen(markerNames[i]);
|
|
BSWAP16(markers[i].MarkerID);
|
|
BSWAP16(markers[i].positionH);
|
|
BSWAP16(markers[i].positionL);
|
|
fwrite(&markers[i], sizeof(Marker), 1, ofile);
|
|
fwrite(&len, 1, 1, ofile);
|
|
fwrite(markerNames[i], len, 1, ofile);
|
|
}
|
|
|
|
write_header(ofile, "INST", sizeof(InstrumentChunk));
|
|
InstChunk.sustainLoop.playMode = bswap16(1);
|
|
InstChunk.sustainLoop.beginLoop = bswap16(1);
|
|
InstChunk.sustainLoop.endLoop = bswap16(2);
|
|
InstChunk.releaseLoop.playMode = 0;
|
|
InstChunk.releaseLoop.beginLoop = 0;
|
|
InstChunk.releaseLoop.endLoop = 0;
|
|
fwrite(&InstChunk, sizeof(InstrumentChunk), 1, ofile);
|
|
}
|
|
|
|
// Save the coefficient table for use when encoding. Ideally this wouldn't
|
|
// be needed and "tabledesign -s 1" would generate the right table, but in
|
|
// practice it's difficult to adjust samples to make that happen.
|
|
write_header(ofile, "APPL", 4 + 12 + sizeof(CodeChunk) + npredictors * order * 8 * 2);
|
|
fwrite("stoc", 4, 1, ofile);
|
|
CodeChunk cChunk;
|
|
cChunk.version = bswap16(1);
|
|
cChunk.order = bswap16(order);
|
|
cChunk.nEntries = bswap16(npredictors);
|
|
fwrite("\x0bVADPCMCODES", 12, 1, ofile);
|
|
fwrite(&cChunk, sizeof(CodeChunk), 1, ofile);
|
|
for (s32 i = 0; i < npredictors; i++) {
|
|
for (s32 j = 0; j < order; j++) {
|
|
for (s32 k = 0; k < 8; k++) {
|
|
s16 ts = bswap16(coefTable[i][k][j]);
|
|
fwrite(&ts, sizeof(s16), 1, ofile);
|
|
}
|
|
}
|
|
}
|
|
|
|
write_header(ofile, "SSND", outputBytes + 8);
|
|
SndDChunk.offset = 0;
|
|
SndDChunk.blockSize = 0;
|
|
fwrite(&SndDChunk, sizeof(SoundDataChunk), 1, ofile);
|
|
fwrite(outputBuf, outputBytes, 1, ofile);
|
|
|
|
// Fix the size in the header
|
|
s32 fileSize = bswap32(ftell(ofile) - 8);
|
|
fseek(ofile, 4, SEEK_SET);
|
|
fwrite(&fileSize, 4, 1, ofile);
|
|
|
|
fclose(ifile);
|
|
fclose(ofile);
|
|
return 0;
|
|
}
|