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novatek(nfwb): improvements to header and part parsing

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theubusu
2026-01-22 22:31:01 +01:00
parent 0e7def869d
commit 8d4f8d5366
1 changed files with 14 additions and 11 deletions
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src/formats/novatek.rs
+14 -11
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@@ -10,14 +10,16 @@ use crate::utils::common;
#[derive(BinRead)] #[derive(BinRead)]
struct Header { struct Header {
#[br(count = 4)] _magic_bytes: Vec<u8>, #[br(count = 4)] _magic_bytes: Vec<u8>,
#[br(count = 4)] _flags: Vec<u8>, version_major: u32,
_header_size: u32, version_minor: u32,
_unused: u32, _unused: u32,
#[br(count = 16)] firmware_name_bytes: Vec<u8>, #[br(count = 16)] firmware_name_bytes: Vec<u8>,
#[br(count = 20)] _unknown1: Vec<u8>, data_size: u32,
#[br(count = 16)] _md5_checksum: Vec<u8>, //data checksum
part_count: u32, part_count: u32,
_first_part_offset: u32, _data_start_offset: u32,
#[br(count = 116)] _unknown2: Vec<u8>, #[br(count = 128)] _signature: Vec<u8>,
_header_checksum: u32, //CRC32, calculated with the field set to 0
} }
impl Header { impl Header {
fn firmware_name(&self) -> String { fn firmware_name(&self) -> String {
@@ -27,10 +29,10 @@ impl Header {
#[derive(BinRead)] #[derive(BinRead)]
struct PartEntry { struct PartEntry {
#[br(count = 16)] _unknown: Vec<u8>, id: u32,
index: u32,
size: u32, size: u32,
offset: u32, offset: u32,
#[br(count = 16)] _md5_checksum: Vec<u8>,
} }
pub fn is_novatek_file(file: &File) -> bool { pub fn is_novatek_file(file: &File) -> bool {
@@ -45,9 +47,10 @@ pub fn is_novatek_file(file: &File) -> bool {
pub fn extract_novatek(mut file: &File, output_folder: &str) -> Result<(), Box<dyn std::error::Error>> { pub fn extract_novatek(mut file: &File, output_folder: &str) -> Result<(), Box<dyn std::error::Error>> {
let header: Header = file.read_le()?; let header: Header = file.read_le()?;
println!("File info:\nFirmware name: {}\nPart count: {}", header.firmware_name(), header.part_count); println!("File info:\nFirmware name: {}\nVersion: {}.{}\nData size: {}\nPart count: {}",
let mut entries: Vec<PartEntry> = Vec::new(); header.firmware_name(), header.version_major, header.version_minor, header.data_size, header.part_count);
let mut entries: Vec<PartEntry> = Vec::new();
for _i in 0..header.part_count { for _i in 0..header.part_count {
let part: PartEntry = file.read_le()?; let part: PartEntry = file.read_le()?;
entries.push(part); entries.push(part);
@@ -56,11 +59,11 @@ pub fn extract_novatek(mut file: &File, output_folder: &str) -> Result<(), Box<d
let mut e_i = 0; let mut e_i = 0;
for entry in &entries { for entry in &entries {
e_i += 1; e_i += 1;
println!("\n({}/{}) - Index: {}, Offset: {}, Size: {}", e_i, entries.len(), entry.index, entry.offset, entry.size); println!("\n({}/{}) - ID: {}, Offset: {}, Size: {}", e_i, entries.len(), entry.id, entry.offset, entry.size);
let data = common::read_file(&file, entry.offset as u64, entry.size as usize)?; let data = common::read_file(&file, entry.offset as u64, entry.size as usize)?;
let output_path = Path::new(&output_folder).join(format!("{}.bin", e_i)); let output_path = Path::new(&output_folder).join(format!("{}_{}.bin", e_i, entry.id));
fs::create_dir_all(&output_folder)?; fs::create_dir_all(&output_folder)?;
let mut out_file = OpenOptions::new() let mut out_file = OpenOptions::new()