pq/libfreemkv
1
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

v0.13.0: zero English in library + API hygiene + dead-code sweep

Browse Source 
Audit pass against the CLAUDE.md "no English text in library code" rule.
Found 9 call sites that violated the contract by stuffing English into
io::Error::new(kind, "…") or by abusing Error::DeviceNotFound { path }
as a free-form description field. Each is now a typed Error variant.

New variants and codes: ScsiInterfaceUnavailable (E1004), DeviceLocked
(E1005), IoKitPluginFailed (E1006), UnsupportedPlatform (E2003),
PlatformNotImplemented (E2004), MapfileInvalid (E6011), DiscUrlNotDirect
(E9009).

labels::apply() previously pushed Commentary/Descriptive/Score/IME and
" (Secondary)" English literals into AudioStream.label, leaking into
MKV titles + autorip UI. AudioStream now exposes structured `purpose:
LabelPurpose`, SubtitleStream `qualifier: LabelQualifier`. Callers
translate to localized text. label keeps codec-formatting only.

API hygiene: 11 mux/* modules dropped from `pub` to `pub(crate)` —
their *types* are still re-exported from lib.rs, but the modules were
leaking low-level EBML/TS/network primitives. Stream trait gets a real
rustdoc explaining read-vs-write split. lib.rs grouped re-exports into
documented sections. ScanOptions::with_keydb() removed (one-method-per-
action rule); use struct literal.

Dead-code sweep: removed lookahead.rs (orphan, never declared as mod),
tsreader.rs (TsDemuxReader unused), ebml::{write_int,read_vint,SEEK_*},
ts::{scan_first/last_pts,scan_duration,SCAN_HEAD/TAIL_SIZE,take/set_
remainder}, MkvMuxer codec_private_slots/filled fields and
fill_codec_private method (deferred-codecPrivate path never used since
the v0.10 PES rewrite). cargo clippy --all-targets -D warnings clean.

Tests: new error::tests for variant codes + Display "no English" guard +
io::ErrorKind mapping. 233 lib tests, all green (was 230).

Breaking: ScanOptions::with_keydb removed; mux/* modules pub(crate);
AudioStream and SubtitleStream gained required fields; UnsupportedDrive
{ product_revision: "Renesas not yet implemented" } no longer produced
(use PlatformNotImplemented).
This commit is contained in:
matthew
2026-04-24 16:41:02 -07:00
parent a0584aa9f1
commit 6fee7ae583
29 changed files with 651 additions and 544 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/mux/ts.rs
+15 -115
View File
@@ -15,12 +15,6 @@ const TS_PACKET_SIZE: usize = 188;
/// TS sync byte.
const SYNC_BYTE: u8 = 0x47;
/// Size of head buffer for PTS/stream scanning (1 MB).
const SCAN_HEAD_SIZE: usize = 1024 * 1024;
/// Size of tail buffer for last-PTS scanning (2 MB).
const SCAN_TAIL_SIZE: usize = 2 * 1024 * 1024;
/// A reassembled PES packet with timestamp info.
#[derive(Debug)]
pub struct PesPacket {
@@ -104,19 +98,16 @@ pub struct TsDemuxer {
}
impl TsDemuxer {
/// Take the remainder bytes (leftover from last feed() that didn't
/// align to a 192-byte packet boundary).
pub fn take_remainder(&mut self) -> Vec<u8> {
std::mem::take(&mut self.remainder)
}
/// Set the remainder bytes. Used to transfer alignment state from
/// one demuxer to another without losing sync.
pub fn set_remainder(&mut self, data: Vec<u8>) {
self.remainder = data;
}
/// Create a new demuxer tracking the given PIDs.
///
/// Allocates a flat lookup table of `i16` slots — one per possible PID
/// up to `max(8192, max_pid + 1)`. The 8192 floor matches the BD-TS
/// 13-bit PID space (0..0x1FFF); the variable upper bound exists for
/// DVD program streams which may use 16-bit stream IDs above 8191.
/// Worst-case allocation is `u16::MAX × 2 bytes ≈ 128 KB` — bounded by
/// the type, so adversarial input can't drive this beyond predictable
/// limits. Empty `pids` yields max_pid 0; the floor still produces a
/// valid (wholly-unused) table.
pub fn new(pids: &[u16]) -> Self {
let max_pid = pids.iter().copied().max().unwrap_or(0) as usize;
let table_size = (max_pid + 1).max(8192);
@@ -446,6 +437,7 @@ pub fn scan_streams(data: &[u8]) -> Option<Vec<crate::disc::Stream>> {
language: "und".into(),
sample_rate: SampleRate::S48,
secondary: false,
purpose: crate::disc::LabelPurpose::Normal,
label: String::new(),
})),
0x83 => Some(Stream::Audio(AudioStream {
@@ -455,6 +447,7 @@ pub fn scan_streams(data: &[u8]) -> Option<Vec<crate::disc::Stream>> {
language: "und".into(),
sample_rate: SampleRate::S48,
secondary: false,
purpose: crate::disc::LabelPurpose::Normal,
label: String::new(),
})),
0x84 | 0xA1 => Some(Stream::Audio(AudioStream {
@@ -464,6 +457,7 @@ pub fn scan_streams(data: &[u8]) -> Option<Vec<crate::disc::Stream>> {
language: "und".into(),
sample_rate: SampleRate::S48,
secondary: false,
purpose: crate::disc::LabelPurpose::Normal,
label: String::new(),
})),
0x85 | 0x86 => Some(Stream::Audio(AudioStream {
@@ -473,6 +467,7 @@ pub fn scan_streams(data: &[u8]) -> Option<Vec<crate::disc::Stream>> {
language: "und".into(),
sample_rate: SampleRate::S48,
secondary: false,
purpose: crate::disc::LabelPurpose::Normal,
label: String::new(),
})),
0x82 => Some(Stream::Audio(AudioStream {
@@ -482,6 +477,7 @@ pub fn scan_streams(data: &[u8]) -> Option<Vec<crate::disc::Stream>> {
language: "und".into(),
sample_rate: SampleRate::S48,
secondary: false,
purpose: crate::disc::LabelPurpose::Normal,
label: String::new(),
})),
0x90 => Some(Stream::Subtitle(SubtitleStream {
@@ -489,6 +485,7 @@ pub fn scan_streams(data: &[u8]) -> Option<Vec<crate::disc::Stream>> {
codec: Codec::Pgs,
language: "und".into(),
forced: false,
qualifier: crate::disc::LabelQualifier::None,
codec_data: None,
})),
_ => None,
@@ -511,103 +508,6 @@ pub fn scan_streams(data: &[u8]) -> Option<Vec<crate::disc::Stream>> {
}
}
// ============================================================
// PTS scanning utilities (for duration detection)
// ============================================================
/// Find the first PTS for a given PID in BD-TS data.
pub fn scan_first_pts(data: &[u8], target_pid: u16) -> Option<i64> {
let mut offset = 0;
while offset + BD_TS_PACKET_SIZE <= data.len() {
if data[offset + 4] != SYNC_BYTE {
offset += 1;
continue;
}
let pid = (((data[offset + 5] & 0x1F) as u16) << 8) | data[offset + 6] as u16;
let pusi = data[offset + 5] & 0x40 != 0;
if pid == target_pid && pusi {
let ts = &data[offset + 4..offset + BD_TS_PACKET_SIZE];
let afc = (ts[3] >> 4) & 0x03;
let payload_start = if afc == 3 { 5 + ts[4] as usize } else { 4 };
if payload_start < TS_PACKET_SIZE {
let payload = &ts[payload_start..];
if payload.len() >= 14 && payload[0] == 0 && payload[1] == 0 && payload[2] == 1 {
let pts_dts_flags = (payload[7] >> 6) & 0x03;
if pts_dts_flags >= 2 {
return parse_timestamp(&payload[9..14]);
}
}
}
}
offset += BD_TS_PACKET_SIZE;
}
None
}
/// Find the last PTS for a given PID in BD-TS data.
pub fn scan_last_pts(data: &[u8], target_pid: u16) -> Option<i64> {
let mut last_pts = None;
let mut offset = 0;
while offset + BD_TS_PACKET_SIZE <= data.len() {
if data[offset + 4] != SYNC_BYTE {
offset += 1;
continue;
}
let pid = (((data[offset + 5] & 0x1F) as u16) << 8) | data[offset + 6] as u16;
let pusi = data[offset + 5] & 0x40 != 0;
if pid == target_pid && pusi {
let ts = &data[offset + 4..offset + BD_TS_PACKET_SIZE];
let afc = (ts[3] >> 4) & 0x03;
let payload_start = if afc == 3 { 5 + ts[4] as usize } else { 4 };
if payload_start < TS_PACKET_SIZE {
let payload = &ts[payload_start..];
if payload.len() >= 14 && payload[0] == 0 && payload[1] == 0 && payload[2] == 1 {
let pts_dts_flags = (payload[7] >> 6) & 0x03;
if pts_dts_flags >= 2 {
last_pts = parse_timestamp(&payload[9..14]);
}
}
}
}
offset += BD_TS_PACKET_SIZE;
}
last_pts
}
/// Scan an m2ts file for duration by reading first and last PTS.
/// Returns duration in seconds, or None if PTS cannot be found.
/// The reader position is restored after scanning.
pub fn scan_duration<R: std::io::Read + std::io::Seek>(r: &mut R, video_pid: u16) -> Option<f64> {
use std::io::SeekFrom;
let start_pos = r.stream_position().ok()?;
// Read first 1MB for first PTS
let mut head_buf = vec![0u8; SCAN_HEAD_SIZE];
r.seek(SeekFrom::Start(0)).ok()?;
let head_n = r.read(&mut head_buf).ok()?;
let first_pts = scan_first_pts(&head_buf[..head_n], video_pid)?;
// Read last 2MB for last PTS (aligned to 192-byte boundary)
let file_size = r.seek(SeekFrom::End(0)).ok()?;
let tail_size: u64 = SCAN_TAIL_SIZE as u64;
let raw_pos = file_size.saturating_sub(tail_size);
let seek_pos = (raw_pos / BD_TS_PACKET_SIZE as u64) * BD_TS_PACKET_SIZE as u64;
r.seek(SeekFrom::Start(seek_pos)).ok()?;
let mut tail_buf = vec![0u8; tail_size as usize];
let tail_n = r.read(&mut tail_buf).ok()?;
let last_pts = scan_last_pts(&tail_buf[..tail_n], video_pid)?;
// Restore reader position
let _ = r.seek(SeekFrom::Start(start_pos));
if last_pts > first_pts {
Some((last_pts - first_pts) as f64 / 90000.0)
} else {
None
}
}
#[cfg(test)]
mod tests {
use super::*;