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LZW Compress use u32

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lifegpc
2025-06-05 16:41:21 +08:00
parent 4e9d7eb943
commit 2321669754
1 changed files with 5 additions and 5 deletions
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10
src/scripts/escude/lzw.rs
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@@ -122,7 +122,7 @@ impl<'a, T: Write> BitWriter<'a, T> {
Ok(()) Ok(())
} }
pub fn put_bits(&mut self, byte: u16, token_width: u8) -> Result<()> { pub fn put_bits(&mut self, byte: u32, token_width: u8) -> Result<()> {
for i in 0..token_width { for i in 0..token_width {
self.put_bit((byte & (1 << (token_width - 1 - i))) != 0)?; self.put_bit((byte & (1 << (token_width - 1 - i))) != 0)?;
} }
@@ -163,16 +163,16 @@ impl LZWEncoder {
if i > 0 && i % 0x4000 == 0 { if i > 0 && i % 0x4000 == 0 {
writer.put_bits(0x102, 9)?; writer.put_bits(0x102, 9)?;
} }
writer.put_bits(input[i] as u16, 9)?; writer.put_bits(input[i] as u32, 9)?;
} }
writer.put_bits(0x100, 9)?; // End of stream writer.put_bits(0x100, 9)?; // End of stream
writer.flush()?; writer.flush()?;
} else { } else {
let mut dict = std::collections::HashMap::new(); let mut dict = std::collections::HashMap::new();
for i in 0..256 { for i in 0..256 {
dict.insert(vec![i as u8], i as u16); dict.insert(vec![i as u8], i);
} }
let mut next_code = 0x103u16; let mut next_code = 0x103u32;
let mut token_width = 9; let mut token_width = 9;
let mut i = 0; let mut i = 0;
@@ -209,7 +209,7 @@ impl LZWEncoder {
writer.put_bits(0x102, token_width)?; // Clear dictionary writer.put_bits(0x102, token_width)?; // Clear dictionary
dict.clear(); dict.clear();
for j in 0..256 { for j in 0..256 {
dict.insert(vec![j as u8], j as u16); dict.insert(vec![j as u8], j);
} }
next_code = 0x103; next_code = 0x103;
token_width = 9; token_width = 9;