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Undo 337eecc9eb. Good intentions but doesn't really fix the core issue (and will break other things)

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This commit is contained in:
Eric MacDonald
2021-08-09 14:23:29 -04:00
committed by zefie
parent 56ab5228cd
commit 2781fc10d4
1 changed files with 11 additions and 10 deletions
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21
zefie_wtvp_minisrv/WTVLzpf.js
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@@ -13,16 +13,17 @@ class WTVLzpf {
current_length = 0;
current_literal = 0;
flag = 0xFFFFFFFF;
flag = 0xFFFF;
working_data = 0;
match_index = 0;
type_index = 0;
checksum = 0;
flag_table = new Uint32Array(0x1000)
flag_table = new Uint16Array(0x1000)
ring_buffer = new Uint8Array(0x2000)
encoded_data = [];
nomatchEncode = [
[0x0000, 0x10], [0x0001, 0x10], [0x0002, 0x10],
[0x0003, 0x10], [0x0004, 0x10], [0x009A, 0x0F],
[0x0005, 0x10], [0x009C, 0x0F], [0x009E, 0x0F],
@@ -281,13 +282,13 @@ class WTVLzpf {
clear() {
this.current_length = 0;
this.current_literal = 0;
this.flag = 0xFFFFFFFF;
this.flag = 0xFFFF;
this.working_data = 0;
this.match_index = 0;
this.type_index = 0;
this.checksum = 0;
this.ring_buffer.fill(0x00, 0, 0x2000)
this.flag_table.fill(0xFFFFFFFF, 0, 0x1000);
this.flag_table.fill(0xFFFF, 0, 0x1000);
this.encoded_data = [];
}
@@ -362,28 +363,28 @@ class WTVLzpf {
this.type_index = 3;
} else {
this.match_index = (this.match_index + 1) & 0x1FFF;
this.flag = (this.flag + 1) & 0x1FFFFFFF;
this.flag = (this.flag + 1) & 0x1FFF;
this.checksum = (this.checksum + byte) & 0xFFFF;
this.working_data = ((this.working_data * 0x0100) + byte) & 0xFFFFFFFF;
i++;
}
} else {
this.flag = 0xFFFFFFFF;
this.flag = 0xFFFF;
if (i >= 3) {
flags_index = (this.working_data >>> 0x0B ^ this.working_data) & 0x0FFF;
this.flag = this.flag_table[flags_index];
this.flag_table[flags_index] = i & 0x1FFFFFFF;
this.flag_table[flags_index] = i & 0x1FFF;
} else {
this.type_index++;
}
if (this.flag == 0xFFFFFFFF) {
if (this.flag == 0xFFFF) {
code_length = this.nomatchEncode[byte][1];
code = this.nomatchEncode[byte][0] << 0x10;
} else if (byte == this.ring_buffer[this.flag] && compress_data) {
this.match_index = 1;
this.flag = (this.flag + 1) & 0x1FFFFFFF;
this.flag = (this.flag + 1) & 0x1FFF;
this.type_index = 4;
} else {
code_length = this.nomatchEncode[byte][1] + 1;
@@ -425,7 +426,7 @@ class WTVLzpf {
var flags_index = (this.working_data >>> 0x0B ^ this.working_data) & 0x0FFF;
var flag = this.flag_table[flags_index];
if (flag == 0xFFFFFFFF) {
if (flag == 0xFFFF) {
this.EncodeLiteral(0x10, 0x00990000);
} else {
this.EncodeLiteral(0x11, 0x004c8000);