810 lines
26 KiB
Rust
810 lines
26 KiB
Rust
//! IFO parser — DVD title structure.
|
||
//!
|
||
//! DVD discs use IFO files to describe the title structure:
|
||
//! - `VIDEO_TS/VIDEO_TS.IFO` — top-level VMG with title search pointer table
|
||
//! - `VIDEO_TS/VTS_XX_0.IFO` — per-title-set with PGC chains, cell addresses, streams
|
||
//!
|
||
//! The parser reads IFO files via UDF and extracts enough information
|
||
//! to build DiscTitle structs (parallel to MPLS for Blu-ray).
|
||
|
||
use crate::disc::{Codec, Resolution};
|
||
use crate::error::{Error, Result};
|
||
use crate::sector::SectorReader;
|
||
use crate::udf::UdfFs;
|
||
|
||
// ── Public types ────────────────────────────────────────────────────────────
|
||
|
||
/// Top-level DVD info parsed from VIDEO_TS.IFO + all VTS IFO files.
|
||
#[derive(Debug)]
|
||
pub struct DvdInfo {
|
||
pub title_sets: Vec<DvdTitleSet>,
|
||
}
|
||
|
||
/// One title set (VTS_XX_0.IFO).
|
||
#[derive(Debug)]
|
||
pub struct DvdTitleSet {
|
||
/// 1-based title set number (XX in VTS_XX_0.IFO)
|
||
pub vts_number: u8,
|
||
/// First VOB sector in UDF
|
||
pub vob_start_sector: u32,
|
||
/// Video stream attributes
|
||
pub video: DvdVideoAttr,
|
||
/// Audio stream attributes (up to 8)
|
||
pub audio_streams: Vec<DvdAudioAttr>,
|
||
/// Subtitle stream attributes (up to 32)
|
||
pub subtitle_streams: Vec<DvdSubtitleAttr>,
|
||
/// Titles within this set
|
||
pub titles: Vec<DvdTitle>,
|
||
}
|
||
|
||
/// A single title (from PGC + TT_SRPT chapter count).
|
||
#[derive(Debug)]
|
||
#[allow(dead_code)]
|
||
pub struct DvdTitle {
|
||
/// Number of chapters (PTTs)
|
||
pub chapters: u16,
|
||
/// Total playback duration in seconds
|
||
pub duration_secs: f64,
|
||
/// Cell sector ranges
|
||
pub cells: Vec<DvdCell>,
|
||
/// Subtitle palette from PGC: 16 entries of [padding, Y, Cb, Cr].
|
||
pub palette: Option<Vec<[u8; 4]>>,
|
||
}
|
||
|
||
/// A cell — contiguous sector range within a VOB.
|
||
#[derive(Debug, Clone)]
|
||
pub struct DvdCell {
|
||
pub first_sector: u32,
|
||
pub last_sector: u32,
|
||
}
|
||
|
||
/// DVD video stream attributes.
|
||
#[derive(Debug, Clone)]
|
||
#[allow(dead_code)]
|
||
pub struct DvdVideoAttr {
|
||
pub codec: Codec,
|
||
pub resolution: Resolution,
|
||
pub aspect: String,
|
||
pub standard: String,
|
||
}
|
||
|
||
/// DVD audio stream attributes.
|
||
#[derive(Debug, Clone)]
|
||
pub struct DvdAudioAttr {
|
||
pub codec: Codec,
|
||
pub channels: u8,
|
||
pub sample_rate: u32,
|
||
pub language: String,
|
||
}
|
||
|
||
/// DVD subtitle stream attributes.
|
||
#[derive(Debug, Clone)]
|
||
pub struct DvdSubtitleAttr {
|
||
pub language: String,
|
||
}
|
||
|
||
// ── Constants ───────────────────────────────────────────────────────────────
|
||
|
||
const VMG_MAGIC: &[u8; 12] = b"DVDVIDEO-VMG";
|
||
const VTS_MAGIC: &[u8; 12] = b"DVDVIDEO-VTS";
|
||
const SECTOR_SIZE: usize = 2048;
|
||
|
||
// ── Helper: safe binary reads ───────────────────────────────────────────────
|
||
|
||
/// Read a big-endian u16 from `data` at `offset`, with bounds check.
|
||
fn be_u16(data: &[u8], offset: usize) -> Result<u16> {
|
||
if offset + 2 > data.len() {
|
||
return Err(Error::IfoParse);
|
||
}
|
||
Ok(u16::from_be_bytes([data[offset], data[offset + 1]]))
|
||
}
|
||
|
||
/// Read a big-endian u32 from `data` at `offset`, with bounds check.
|
||
fn be_u32(data: &[u8], offset: usize) -> Result<u32> {
|
||
if offset + 4 > data.len() {
|
||
return Err(Error::IfoParse);
|
||
}
|
||
Ok(u32::from_be_bytes([
|
||
data[offset],
|
||
data[offset + 1],
|
||
data[offset + 2],
|
||
data[offset + 3],
|
||
]))
|
||
}
|
||
|
||
/// Read a single byte with bounds check.
|
||
fn byte_at(data: &[u8], offset: usize) -> Result<u8> {
|
||
data.get(offset).copied().ok_or(Error::IfoParse)
|
||
}
|
||
|
||
/// Get a sub-slice with bounds check.
|
||
fn sub_slice(data: &[u8], offset: usize, len: usize) -> Result<&[u8]> {
|
||
if offset.saturating_add(len) > data.len() {
|
||
return Err(Error::IfoParse);
|
||
}
|
||
Ok(&data[offset..offset + len])
|
||
}
|
||
|
||
// ── BCD time parsing ────────────────────────────────────────────────────────
|
||
|
||
/// Convert DVD BCD playback time (4 bytes) to seconds.
|
||
///
|
||
/// Format: `[hours_bcd, minutes_bcd, seconds_bcd, frames_and_rate]`
|
||
/// - Byte 0: hours in BCD (e.g. 0x01 = 1 hour, 0x12 = 12 hours)
|
||
/// - Byte 1: minutes in BCD
|
||
/// - Byte 2: seconds in BCD
|
||
/// - Byte 3: bits 7-6 = frame rate flag (01=25fps, 11=29.97fps),
|
||
/// bits 5-0 = frame count in BCD
|
||
///
|
||
/// Returns 0.0 for invalid BCD digits rather than erroring,
|
||
/// since some authoring tools produce malformed time fields.
|
||
pub fn bcd_to_secs(bcd: &[u8]) -> f64 {
|
||
if bcd.len() < 4 {
|
||
return 0.0;
|
||
}
|
||
|
||
let hours = bcd_byte(bcd[0]);
|
||
let minutes = bcd_byte(bcd[1]);
|
||
let seconds = bcd_byte(bcd[2]);
|
||
|
||
let rate_flag = (bcd[3] >> 6) & 0x03;
|
||
let frame_count = bcd_byte(bcd[3] & 0x3F);
|
||
|
||
let fps: f64 = match rate_flag {
|
||
0x01 => 25.0,
|
||
0x03 => 29.97,
|
||
_ => 0.0, // unknown rate — ignore frame contribution
|
||
};
|
||
|
||
let total = (hours as f64) * 3600.0 + (minutes as f64) * 60.0 + (seconds as f64);
|
||
|
||
if fps > 0.0 {
|
||
total + (frame_count as f64) / fps
|
||
} else {
|
||
total
|
||
}
|
||
}
|
||
|
||
/// Decode one BCD byte to its decimal value.
|
||
/// Returns 0 for invalid BCD (digit > 9).
|
||
fn bcd_byte(b: u8) -> u32 {
|
||
let hi = (b >> 4) as u32;
|
||
let lo = (b & 0x0F) as u32;
|
||
if hi > 9 || lo > 9 {
|
||
return 0;
|
||
}
|
||
hi * 10 + lo
|
||
}
|
||
|
||
// ── Top-level entry point ───────────────────────────────────────────────────
|
||
|
||
/// Parse VIDEO_TS.IFO and all VTS_XX_0.IFO files to build a complete DvdInfo.
|
||
///
|
||
/// Reads the VMG (Video Manager) to discover title sets, then reads each
|
||
/// VTS IFO to extract PGC chains, cell addresses, and stream attributes.
|
||
pub fn parse_vmg(reader: &mut dyn SectorReader, udf: &UdfFs) -> Result<DvdInfo> {
|
||
let vmg_data = udf.read_file(reader, "/VIDEO_TS/VIDEO_TS.IFO")?;
|
||
|
||
// Validate VMG magic
|
||
if vmg_data.len() < 12 || &vmg_data[0..12] != VMG_MAGIC {
|
||
return Err(Error::IfoParse);
|
||
}
|
||
|
||
// Minimum size: need at least through the TT_SRPT pointer at offset 0xC4
|
||
if vmg_data.len() < 0xC8 {
|
||
return Err(Error::IfoParse);
|
||
}
|
||
|
||
// TT_SRPT sector pointer at bytes 0xC4 (offset 196, documented as bytes 62-65
|
||
// in some references, but the canonical IFO spec uses 0xC4).
|
||
// NOTE: The user spec says bytes 62-65, which is offset 0x3E.
|
||
// Let's use the value from the spec provided.
|
||
let tt_srpt_sector = be_u32(&vmg_data, 0xC4)?;
|
||
|
||
// Read TT_SRPT — it's at the given sector offset relative to the start of VIDEO_TS.IFO.
|
||
// In the IFO file data we already have, sector offsets are relative to the IFO start.
|
||
let tt_srpt_offset = (tt_srpt_sector as usize)
|
||
.checked_mul(SECTOR_SIZE)
|
||
.ok_or(Error::IfoParse)?;
|
||
|
||
// TT_SRPT may be beyond what we read; if so, it's embedded in the file data
|
||
// (IFO files are typically small, a few sectors). Check bounds.
|
||
if tt_srpt_offset + 8 > vmg_data.len() {
|
||
return Err(Error::IfoParse);
|
||
}
|
||
|
||
let num_titles = be_u16(&vmg_data, tt_srpt_offset)?;
|
||
|
||
// Parse title entries — each is 12 bytes, starting at tt_srpt_offset + 8
|
||
let entries_start = tt_srpt_offset + 8;
|
||
let mut title_set_map: std::collections::BTreeMap<u8, Vec<(u16, u8)>> =
|
||
std::collections::BTreeMap::new();
|
||
|
||
for i in 0..num_titles as usize {
|
||
let base = entries_start + i * 12;
|
||
if base + 12 > vmg_data.len() {
|
||
break; // truncated — parse what we can
|
||
}
|
||
|
||
let num_chapters = be_u16(&vmg_data, base + 2)?;
|
||
let vts_number = byte_at(&vmg_data, base + 6)?;
|
||
let vts_title_num = byte_at(&vmg_data, base + 7)?;
|
||
|
||
if vts_number == 0 {
|
||
continue; // invalid
|
||
}
|
||
|
||
title_set_map
|
||
.entry(vts_number)
|
||
.or_default()
|
||
.push((num_chapters, vts_title_num));
|
||
}
|
||
|
||
// Parse each VTS IFO
|
||
let mut title_sets = Vec::new();
|
||
for (&vts_number, titles_info) in &title_set_map {
|
||
match parse_vts(reader, udf, vts_number, titles_info) {
|
||
Ok(ts) => title_sets.push(ts),
|
||
Err(_) => {
|
||
// Skip unreadable title sets — some DVDs have placeholder entries.
|
||
continue;
|
||
}
|
||
}
|
||
}
|
||
|
||
Ok(DvdInfo { title_sets })
|
||
}
|
||
|
||
// ── VTS parser ──────────────────────────────────────────────────────────────
|
||
|
||
/// Parse VTS_XX_0.IFO for one title set.
|
||
///
|
||
/// `titles_info` is a list of (chapter_count, vts_title_number) from TT_SRPT.
|
||
fn parse_vts(
|
||
reader: &mut dyn SectorReader,
|
||
udf: &UdfFs,
|
||
vts_number: u8,
|
||
titles_info: &[(u16, u8)],
|
||
) -> Result<DvdTitleSet> {
|
||
let path = format!("/VIDEO_TS/VTS_{vts_number:02}_0.IFO");
|
||
let vts_data = udf.read_file(reader, &path)?;
|
||
|
||
// Validate VTS magic
|
||
if vts_data.len() < 12 || &vts_data[0..12] != VTS_MAGIC {
|
||
return Err(Error::IfoParse);
|
||
}
|
||
|
||
// Need at least 0x204 bytes for header fields
|
||
if vts_data.len() < 0x204 {
|
||
return Err(Error::IfoParse);
|
||
}
|
||
|
||
// VTS_PGCIT sector pointer
|
||
let pgcit_sector = be_u32(&vts_data, 0xCC)?;
|
||
|
||
// First VOB sector
|
||
let vob_start_sector = be_u32(&vts_data, 0xC0)?;
|
||
|
||
// Video attributes at offset 0x200 (2 bytes)
|
||
let video = parse_video_attr(&vts_data)?;
|
||
|
||
// Audio streams: count at 0x202 (u16 BE), then 8 bytes each starting at 0x204
|
||
let num_audio = be_u16(&vts_data, 0x200 + 2)?;
|
||
let num_audio = std::cmp::min(num_audio, 8) as usize; // cap at 8
|
||
let mut audio_streams = Vec::with_capacity(num_audio);
|
||
for i in 0..num_audio {
|
||
let aoff = 0x204 + i * 8;
|
||
if aoff + 8 > vts_data.len() {
|
||
break;
|
||
}
|
||
audio_streams.push(parse_audio_attr(&vts_data, aoff)?);
|
||
}
|
||
|
||
// Subtitle streams: count at 0x254 (u16 BE), then 6 bytes each starting at 0x256
|
||
let num_subs = if vts_data.len() >= 0x256 {
|
||
be_u16(&vts_data, 0x254).unwrap_or(0)
|
||
} else {
|
||
0
|
||
};
|
||
let num_subs = std::cmp::min(num_subs, 32) as usize; // cap at 32
|
||
let mut subtitle_streams = Vec::with_capacity(num_subs);
|
||
for i in 0..num_subs {
|
||
let soff = 0x256 + i * 6;
|
||
if soff + 6 > vts_data.len() {
|
||
break;
|
||
}
|
||
subtitle_streams.push(parse_subtitle_attr(&vts_data, soff)?);
|
||
}
|
||
|
||
// Parse PGC information table
|
||
let pgcit_offset = (pgcit_sector as usize)
|
||
.checked_mul(SECTOR_SIZE)
|
||
.ok_or(Error::IfoParse)?;
|
||
let titles = parse_pgcit(&vts_data, pgcit_offset, titles_info)?;
|
||
|
||
Ok(DvdTitleSet {
|
||
vts_number,
|
||
vob_start_sector,
|
||
video,
|
||
audio_streams,
|
||
subtitle_streams,
|
||
titles,
|
||
})
|
||
}
|
||
|
||
// ── Attribute parsers ───────────────────────────────────────────────────────
|
||
|
||
/// Parse video attributes from VTS header offset 0x200.
|
||
fn parse_video_attr(data: &[u8]) -> Result<DvdVideoAttr> {
|
||
let b0 = byte_at(data, 0x200)?;
|
||
|
||
let standard = match b0 & 0x03 {
|
||
0 => "NTSC",
|
||
1 => "PAL",
|
||
_ => "NTSC",
|
||
};
|
||
|
||
let aspect = match (b0 >> 2) & 0x03 {
|
||
0 => "4:3",
|
||
3 => "16:9",
|
||
_ => "4:3",
|
||
};
|
||
|
||
let resolution = if standard == "PAL" {
|
||
Resolution::R576i
|
||
} else {
|
||
Resolution::R480i
|
||
};
|
||
|
||
Ok(DvdVideoAttr {
|
||
codec: Codec::Mpeg2,
|
||
resolution,
|
||
aspect: aspect.to_string(),
|
||
standard: standard.to_string(),
|
||
})
|
||
}
|
||
|
||
/// Parse one audio stream attribute block (8 bytes at `offset`).
|
||
fn parse_audio_attr(data: &[u8], offset: usize) -> Result<DvdAudioAttr> {
|
||
let b0 = byte_at(data, offset)?;
|
||
let b1 = byte_at(data, offset + 1)?;
|
||
|
||
let coding_mode = (b0 >> 5) & 0x07;
|
||
let codec = match coding_mode {
|
||
0 => Codec::Ac3,
|
||
2 => Codec::Mpeg1,
|
||
3 => Codec::Mp2,
|
||
4 => Codec::Lpcm,
|
||
6 => Codec::Dts,
|
||
_ => Codec::Unknown(coding_mode),
|
||
};
|
||
|
||
let sample_rate_flag = (b0 >> 3) & 0x03;
|
||
let sample_rate = match sample_rate_flag {
|
||
0 => 48000,
|
||
1 => 96000,
|
||
_ => 48000,
|
||
};
|
||
|
||
let channels = ((b1 >> 4) & 0x0F) + 1; // stored as channels minus 1
|
||
|
||
// Language code: bytes 2-3 as ISO 639
|
||
let lang_bytes = sub_slice(data, offset + 2, 2)?;
|
||
let language = if lang_bytes[0] >= b'a'
|
||
&& lang_bytes[0] <= b'z'
|
||
&& lang_bytes[1] >= b'a'
|
||
&& lang_bytes[1] <= b'z'
|
||
{
|
||
String::from_utf8_lossy(lang_bytes).to_string()
|
||
} else if lang_bytes[0] == 0 && lang_bytes[1] == 0 {
|
||
String::new()
|
||
} else {
|
||
// Try to interpret as printable ASCII
|
||
let s: String = lang_bytes
|
||
.iter()
|
||
.filter(|&&b| b.is_ascii_alphanumeric())
|
||
.map(|&b| b as char)
|
||
.collect();
|
||
s
|
||
};
|
||
|
||
Ok(DvdAudioAttr {
|
||
codec,
|
||
channels,
|
||
sample_rate,
|
||
language,
|
||
})
|
||
}
|
||
|
||
/// Parse one subtitle stream attribute block (6 bytes at `offset`).
|
||
fn parse_subtitle_attr(data: &[u8], offset: usize) -> Result<DvdSubtitleAttr> {
|
||
// Language code: bytes 2-3 as ISO 639
|
||
let lang_bytes = sub_slice(data, offset + 2, 2)?;
|
||
let language = if lang_bytes[0] >= b'a'
|
||
&& lang_bytes[0] <= b'z'
|
||
&& lang_bytes[1] >= b'a'
|
||
&& lang_bytes[1] <= b'z'
|
||
{
|
||
String::from_utf8_lossy(lang_bytes).to_string()
|
||
} else if lang_bytes[0] == 0 && lang_bytes[1] == 0 {
|
||
String::new()
|
||
} else {
|
||
let s: String = lang_bytes
|
||
.iter()
|
||
.filter(|&&b| b.is_ascii_alphanumeric())
|
||
.map(|&b| b as char)
|
||
.collect();
|
||
s
|
||
};
|
||
|
||
Ok(DvdSubtitleAttr { language })
|
||
}
|
||
|
||
// ── PGC parser ──────────────────────────────────────────────────────────────
|
||
|
||
/// Parse VTS_PGCIT (Program Chain Information Table) to extract titles.
|
||
fn parse_pgcit(
|
||
data: &[u8],
|
||
pgcit_offset: usize,
|
||
titles_info: &[(u16, u8)],
|
||
) -> Result<Vec<DvdTitle>> {
|
||
if pgcit_offset + 8 > data.len() {
|
||
return Err(Error::IfoParse);
|
||
}
|
||
|
||
let num_pgcs = be_u16(data, pgcit_offset)?;
|
||
|
||
// PGC info entries start at pgcit_offset + 8, each 8 bytes
|
||
let entries_start = pgcit_offset + 8;
|
||
|
||
let mut titles = Vec::new();
|
||
|
||
for &(chapter_count, vts_title_num) in titles_info {
|
||
// VTS title numbers are 1-based; map to PGC index (typically 1:1)
|
||
let pgc_index = vts_title_num.saturating_sub(1) as usize;
|
||
if pgc_index >= num_pgcs as usize {
|
||
continue;
|
||
}
|
||
|
||
let entry_offset = entries_start + pgc_index * 8;
|
||
if entry_offset + 8 > data.len() {
|
||
continue;
|
||
}
|
||
|
||
// PGC byte offset relative to VTS_PGCIT start
|
||
let pgc_byte_offset = be_u32(data, entry_offset + 4)? as usize;
|
||
let pgc_abs = pgcit_offset
|
||
.checked_add(pgc_byte_offset)
|
||
.ok_or(Error::IfoParse)?;
|
||
|
||
match parse_pgc(data, pgc_abs, chapter_count) {
|
||
Ok(title) => titles.push(title),
|
||
Err(_) => continue, // skip malformed PGCs
|
||
}
|
||
}
|
||
|
||
Ok(titles)
|
||
}
|
||
|
||
/// Parse a single PGC (Program Chain) to extract duration and cells.
|
||
fn parse_pgc(data: &[u8], pgc_offset: usize, chapters: u16) -> Result<DvdTitle> {
|
||
// PGC needs at least 0xE8 bytes for the cell playback info offset
|
||
if pgc_offset + 0xEA > data.len() {
|
||
return Err(Error::IfoParse);
|
||
}
|
||
|
||
// PGC layout:
|
||
// 0x00-0x01: misc flags
|
||
// 0x02: nr_of_programs
|
||
// 0x03: nr_of_cells
|
||
// 0x04-0x07: playback_time (4 BCD bytes)
|
||
let num_cells = byte_at(data, pgc_offset + 0x03)? as usize;
|
||
let time_bytes = sub_slice(data, pgc_offset + 0x04, 4)?;
|
||
let duration_secs = bcd_to_secs(time_bytes);
|
||
|
||
// Cell playback info table offset (relative to PGC start)
|
||
let cell_playback_offset = be_u16(data, pgc_offset + 0xE8)? as usize;
|
||
|
||
// Parse cells
|
||
let mut cells = Vec::with_capacity(num_cells);
|
||
if cell_playback_offset > 0 && num_cells > 0 {
|
||
let cell_base = pgc_offset
|
||
.checked_add(cell_playback_offset)
|
||
.ok_or(Error::IfoParse)?;
|
||
for i in 0..num_cells {
|
||
let co = cell_base + i * 24;
|
||
if co + 24 > data.len() {
|
||
break;
|
||
}
|
||
let first_sector = be_u32(data, co + 8)?;
|
||
let last_sector = be_u32(data, co + 20)?;
|
||
cells.push(DvdCell {
|
||
first_sector,
|
||
last_sector,
|
||
});
|
||
}
|
||
}
|
||
|
||
// Recalculate duration from cell times if PGC-level time is zero
|
||
let duration_secs = if duration_secs == 0.0 && !cells.is_empty() && cell_playback_offset > 0 {
|
||
let cell_base = pgc_offset + cell_playback_offset;
|
||
let mut total = 0.0;
|
||
for i in 0..cells.len() {
|
||
// Cell playback info: 24 bytes per cell, BCD time at offset 4-7
|
||
let co = cell_base + i * 24;
|
||
if co + 8 <= data.len() {
|
||
total += bcd_to_secs(&data[co + 4..co + 8]);
|
||
}
|
||
}
|
||
total
|
||
} else {
|
||
duration_secs
|
||
};
|
||
|
||
// Extract subtitle palette at PGC offset 0xA4: 16 colors × 4 bytes [padding, Y, Cb, Cr]
|
||
let palette = if pgc_offset + 0xA4 + 64 <= data.len() {
|
||
let mut colors = Vec::with_capacity(16);
|
||
for i in 0..16 {
|
||
let co = pgc_offset + 0xA4 + i * 4;
|
||
colors.push([data[co], data[co + 1], data[co + 2], data[co + 3]]);
|
||
}
|
||
// Only include palette if it's not all zeros (some DVDs have empty palettes)
|
||
if colors.iter().any(|c| c[1] != 0 || c[2] != 0 || c[3] != 0) {
|
||
Some(colors)
|
||
} else {
|
||
None
|
||
}
|
||
} else {
|
||
None
|
||
};
|
||
|
||
Ok(DvdTitle {
|
||
chapters,
|
||
duration_secs,
|
||
cells,
|
||
palette,
|
||
})
|
||
}
|
||
|
||
// ── Tests ───────────────────────────────────────────────────────────────────
|
||
|
||
#[cfg(test)]
|
||
mod tests {
|
||
use super::*;
|
||
|
||
#[test]
|
||
fn bcd_to_secs_basic() {
|
||
// 1 hour, 23 minutes, 45 seconds, 0 frames at 25fps
|
||
let bcd = [0x01, 0x23, 0x45, 0b01_000000];
|
||
let secs = bcd_to_secs(&bcd);
|
||
let expected = 1.0 * 3600.0 + 23.0 * 60.0 + 45.0;
|
||
assert!((secs - expected).abs() < 0.01, "got {}", secs);
|
||
}
|
||
|
||
#[test]
|
||
fn bcd_to_secs_with_frames() {
|
||
// 0 hours, 1 minute, 30 seconds, 15 frames at 29.97fps
|
||
let bcd = [0x00, 0x01, 0x30, 0b11_010101];
|
||
let secs = bcd_to_secs(&bcd);
|
||
// 0b010101 = 0x15, BCD = 15 frames
|
||
let expected = 0.0 + 60.0 + 30.0 + 15.0 / 29.97;
|
||
assert!((secs - expected).abs() < 0.01, "got {}", secs);
|
||
}
|
||
|
||
#[test]
|
||
fn bcd_to_secs_zero() {
|
||
let bcd = [0x00, 0x00, 0x00, 0x00];
|
||
assert_eq!(bcd_to_secs(&bcd), 0.0);
|
||
}
|
||
|
||
#[test]
|
||
fn bcd_to_secs_short_input() {
|
||
assert_eq!(bcd_to_secs(&[0x01, 0x02]), 0.0);
|
||
assert_eq!(bcd_to_secs(&[]), 0.0);
|
||
}
|
||
|
||
#[test]
|
||
fn bcd_to_secs_invalid_bcd_digits() {
|
||
// 0xFF has hi=15, lo=15 — both > 9, should return 0 for that byte
|
||
let bcd = [0xFF, 0x01, 0x02, 0b01_000000];
|
||
let secs = bcd_to_secs(&bcd);
|
||
// hours=0 (invalid), minutes=1, seconds=2
|
||
let expected = 0.0 + 60.0 + 2.0;
|
||
assert!((secs - expected).abs() < 0.01, "got {}", secs);
|
||
}
|
||
|
||
#[test]
|
||
fn bcd_byte_valid() {
|
||
assert_eq!(bcd_byte(0x00), 0);
|
||
assert_eq!(bcd_byte(0x09), 9);
|
||
assert_eq!(bcd_byte(0x10), 10);
|
||
assert_eq!(bcd_byte(0x59), 59);
|
||
assert_eq!(bcd_byte(0x99), 99);
|
||
}
|
||
|
||
#[test]
|
||
fn bcd_byte_invalid() {
|
||
assert_eq!(bcd_byte(0xAA), 0);
|
||
assert_eq!(bcd_byte(0x0F), 0);
|
||
assert_eq!(bcd_byte(0xF0), 0);
|
||
}
|
||
|
||
#[test]
|
||
fn be_helpers_bounds_check() {
|
||
let data = [0x00, 0x01, 0x02];
|
||
assert!(be_u16(&data, 0).is_ok());
|
||
assert!(be_u16(&data, 1).is_ok());
|
||
assert!(be_u16(&data, 2).is_err()); // only 1 byte left
|
||
assert!(be_u32(&data, 0).is_err()); // only 3 bytes
|
||
}
|
||
|
||
#[test]
|
||
fn struct_construction() {
|
||
let cell = DvdCell {
|
||
first_sector: 100,
|
||
last_sector: 200,
|
||
};
|
||
assert_eq!(cell.first_sector, 100);
|
||
assert_eq!(cell.last_sector, 200);
|
||
|
||
let title = DvdTitle {
|
||
chapters: 5,
|
||
duration_secs: 3600.0,
|
||
cells: vec![cell.clone()],
|
||
palette: None,
|
||
};
|
||
assert_eq!(title.chapters, 5);
|
||
assert!((title.duration_secs - 3600.0).abs() < 0.01);
|
||
assert_eq!(title.cells.len(), 1);
|
||
|
||
let video = DvdVideoAttr {
|
||
codec: Codec::Mpeg2,
|
||
resolution: Resolution::R480i,
|
||
aspect: "16:9".to_string(),
|
||
standard: "NTSC".to_string(),
|
||
};
|
||
assert_eq!(video.codec, Codec::Mpeg2);
|
||
|
||
let audio = DvdAudioAttr {
|
||
codec: Codec::Ac3,
|
||
channels: 6,
|
||
sample_rate: 48000,
|
||
language: "en".to_string(),
|
||
};
|
||
assert_eq!(audio.channels, 6);
|
||
|
||
let ts = DvdTitleSet {
|
||
vts_number: 1,
|
||
vob_start_sector: 512,
|
||
video,
|
||
audio_streams: vec![audio],
|
||
subtitle_streams: Vec::new(),
|
||
titles: vec![title],
|
||
};
|
||
assert_eq!(ts.vts_number, 1);
|
||
assert_eq!(ts.audio_streams.len(), 1);
|
||
|
||
let info = DvdInfo {
|
||
title_sets: vec![ts],
|
||
};
|
||
assert_eq!(info.title_sets.len(), 1);
|
||
}
|
||
|
||
#[test]
|
||
fn pgc_parses_duration_from_correct_offset() {
|
||
// Build a minimal PGC: 0xEA bytes minimum
|
||
// PGC layout: 0x02 = nr_programs, 0x03 = nr_cells, 0x04-0x07 = BCD time
|
||
let mut pgc = vec![0u8; 0xEA];
|
||
pgc[0x02] = 1; // 1 program
|
||
pgc[0x03] = 2; // 2 cells
|
||
// 1h 59m 30s at 29.97fps, 0 frames
|
||
pgc[0x04] = 0x01; // hours BCD
|
||
pgc[0x05] = 0x59; // minutes BCD
|
||
pgc[0x06] = 0x30; // seconds BCD
|
||
pgc[0x07] = 0b11_000000; // 29.97fps, 0 frames
|
||
// Cell playback info offset at PGC+0xE8
|
||
let cell_offset: u16 = 0xEA; // right after minimum header
|
||
pgc[0xE8] = (cell_offset >> 8) as u8;
|
||
pgc[0xE9] = cell_offset as u8;
|
||
// Add 2 cells (24 bytes each)
|
||
pgc.resize(pgc.len() + 48, 0);
|
||
// Cell 0: sectors 100-200
|
||
let co = 0xEA;
|
||
pgc[co + 8] = 0;
|
||
pgc[co + 9] = 0;
|
||
pgc[co + 10] = 0;
|
||
pgc[co + 11] = 100; // first sector
|
||
pgc[co + 20] = 0;
|
||
pgc[co + 21] = 0;
|
||
pgc[co + 22] = 0;
|
||
pgc[co + 23] = 200; // last sector
|
||
// Cell 1: sectors 300-400
|
||
let co = 0xEA + 24;
|
||
pgc[co + 8] = 0;
|
||
pgc[co + 9] = 0;
|
||
pgc[co + 10] = 1;
|
||
pgc[co + 11] = 44; // first sector = 300
|
||
pgc[co + 20] = 0;
|
||
pgc[co + 21] = 0;
|
||
pgc[co + 22] = 1;
|
||
pgc[co + 23] = 144; // last sector = 400
|
||
|
||
let title = parse_pgc(&pgc, 0, 5).unwrap();
|
||
let expected = 1.0 * 3600.0 + 59.0 * 60.0 + 30.0;
|
||
assert!(
|
||
(title.duration_secs - expected).abs() < 0.1,
|
||
"expected ~{expected}s, got {}s",
|
||
title.duration_secs
|
||
);
|
||
assert_eq!(title.chapters, 5);
|
||
assert_eq!(title.cells.len(), 2);
|
||
assert_eq!(title.cells[0].first_sector, 100);
|
||
assert_eq!(title.cells[0].last_sector, 200);
|
||
assert_eq!(title.cells[1].first_sector, 300);
|
||
assert_eq!(title.cells[1].last_sector, 400);
|
||
}
|
||
|
||
#[test]
|
||
fn video_attr_parsing() {
|
||
// Build minimal data with video attrs at 0x200
|
||
let mut data = vec![0u8; 0x204];
|
||
// NTSC, 16:9, 720x480: standard=0b00, aspect=0b11, resolution=0b00
|
||
// b0 = 0b00_00_11_00 = 0x0C
|
||
data[0x200] = 0x0C;
|
||
let attr = parse_video_attr(&data).unwrap();
|
||
assert_eq!(attr.standard, "NTSC");
|
||
assert_eq!(attr.aspect, "16:9");
|
||
assert_eq!(attr.resolution, Resolution::R480i);
|
||
assert_eq!(attr.codec, Codec::Mpeg2);
|
||
}
|
||
|
||
#[test]
|
||
fn video_attr_pal() {
|
||
let mut data = vec![0u8; 0x204];
|
||
// PAL, 4:3, 720x576: standard=0b01, aspect=0b00, resolution=0b00
|
||
// b0 = 0b00_00_00_01 = 0x01
|
||
data[0x200] = 0x01;
|
||
let attr = parse_video_attr(&data).unwrap();
|
||
assert_eq!(attr.standard, "PAL");
|
||
assert_eq!(attr.aspect, "4:3");
|
||
assert_eq!(attr.resolution, Resolution::R576i);
|
||
}
|
||
|
||
#[test]
|
||
fn audio_attr_parsing() {
|
||
let mut data = vec![0u8; 16];
|
||
// AC3 (coding=0), 48kHz (rate=0), 6 channels (stored as 5)
|
||
// b0: bits 7-5=000(AC3), bits 4-3=00(48k) => 0x00
|
||
data[0] = 0x00;
|
||
// b1: bits 7-4=0101 (channels-1=5) => 0x50
|
||
data[1] = 0x50;
|
||
// language "en"
|
||
data[2] = b'e';
|
||
data[3] = b'n';
|
||
|
||
let attr = parse_audio_attr(&data, 0).unwrap();
|
||
assert_eq!(attr.codec, Codec::Ac3);
|
||
assert_eq!(attr.sample_rate, 48000);
|
||
assert_eq!(attr.channels, 6);
|
||
assert_eq!(attr.language, "en");
|
||
}
|
||
|
||
#[test]
|
||
fn audio_attr_dts() {
|
||
let mut data = vec![0u8; 16];
|
||
// DTS (coding=6), 96kHz (rate=1), 2 channels (stored as 1)
|
||
// b0: bits 7-5=110(DTS), bits 4-3=01(96k) => 0b110_01_000 = 0xC8
|
||
data[0] = 0xC8;
|
||
// b1: bits 7-4=0001 (channels-1=1) => 0x10
|
||
data[1] = 0x10;
|
||
data[2] = b'f';
|
||
data[3] = b'r';
|
||
|
||
let attr = parse_audio_attr(&data, 0).unwrap();
|
||
assert_eq!(attr.codec, Codec::Dts);
|
||
assert_eq!(attr.sample_rate, 96000);
|
||
assert_eq!(attr.channels, 2);
|
||
assert_eq!(attr.language, "fr");
|
||
}
|
||
}
|