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#include "z64jpeg.h"
#include "libc/stdbool.h"
#include "macros.h"
void JpegUtils_ProcessQuantizationTable(u8* dqt, JpegQuantizationTable* qt, u8 count) {
u8 i;
for (i = 0; i < count; i++) {
u8 j;
dqt++;
for (j = 0; j < ARRAY_COUNT(qt[i].table); j++) {
qt[i].table[j] = *dqt++;
}
}
}
s32 JpegUtils_ParseHuffmanCodesLengths(u8* ptr, u8* codesLengths) {
u8 off = 1;
s16 count = 0;
s16 idx = 1;
while (off <= 16) {
while (idx <= ptr[off - 1]) {
codesLengths[count++] = off;
idx++;
}
idx = 1;
off++;
}
codesLengths[count] = 0;
return count;
}
s32 JpegUtils_GetHuffmanCodes(u8* codesLengths, u16* codes) {
s16 idx = 0;
u16 code = 0;
u8 lastLen = codesLengths[0];
while (true) {
while (true) {
codes[idx++] = code++;
if (codesLengths[idx] != lastLen) {
break;
}
}
if (codesLengths[idx] == 0) {
break;
}
while (true) {
if (code <<= 1, codesLengths[idx] == ++lastLen) {
break;
}
}
}
return idx;
}
s32 JpegUtils_SetHuffmanTable(u8* data, JpegHuffmanTable* ht, u16* codes) {
u8 idx;
u16 codeOff = 0;
for (idx = 0; idx < 16; idx++) {
if (data[idx]) {
ht->codeOffs[idx] = codeOff;
ht->codesA[idx] = codes[codeOff];
codeOff += data[idx] - 1;
ht->codesB[idx] = codes[codeOff];
codeOff++;
} else {
ht->codesB[idx] = 0xFFFF;
}
}
return codeOff;
}
u32 JpegUtils_ProcessHuffmanTableImpl(u8* data, JpegHuffmanTable* ht, u8* codesLengths, u16* codes, u8 isAc) {
s16 ret;
s32 count = JpegUtils_ParseHuffmanCodesLengths(data, codesLengths);
s32 temp;
ret = count;
if (count == 0 || (isAc && count > 0x100) || (!isAc && count > 0x10)) {
return 0;
}
if (ret != JpegUtils_GetHuffmanCodes(codesLengths, codes)) {
return 0;
}
if (temp = JpegUtils_SetHuffmanTable(data, ht, codes), temp != ret) {
return 0;
}
return ret;
}
u32 JpegUtils_ProcessHuffmanTable(u8* dht, JpegHuffmanTable* ht, u8* codesLengths, u16* codes, u8 count) {
u8 idx;
u32 codeCount;
for (idx = 0; idx < count; idx++) {
u32 ac = (*dht++ >> 4);
codeCount = JpegUtils_ProcessHuffmanTableImpl(dht, &ht[idx], codesLengths, codes, ac);
if (codeCount == 0) {
return true;
}
dht += 16;
ht[idx].symbols = dht;
dht += codeCount;
}
return false;
}
void JpegUtils_SetHuffmanTableOld(u8* data, JpegHuffmanTableOld* ht, u8* codesLengths, u16* codes, s16 count, u8 isAc) {
s16 idx;
u8 a;
for (idx = 0; idx < count; idx++) {
a = data[idx];
if (isAc) {
ht->acCodes[a] = codes[idx];
ht->codeOffs[a] = codesLengths[idx];
} else {
ht->dcCodes[a] = codes[idx];
ht->codeOffs[a] = codesLengths[idx];
}
}
}
u32 JpegUtils_ProcessHuffmanTableImplOld(u8* dht, JpegHuffmanTableOld* ht, u8* codesLengths, u16* codes) {
u8 isAc = *dht++ >> 4;
s16 count2;
s32 count;
count2 = count = JpegUtils_ParseHuffmanCodesLengths(dht, codesLengths);
if (count == 0 || (isAc && count > 0x100) || (!isAc && count > 0x10)) {
return true;
}
if (JpegUtils_GetHuffmanCodes(codesLengths, codes) != count2) {
return true;
}
JpegUtils_SetHuffmanTableOld(dht + 0x10, ht, codesLengths, codes, count2, isAc);
return false;
}
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