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//! Blu-ray title scanning — MPLS playlist parsing, CLPI clip info, BD metadata.
use super::*;
use crate::clpi;
use crate::mpls;
use crate::sector::SectorReader;
use crate::udf;
impl Disc {
/// Scan Blu-ray titles from MPLS playlists.
pub(super) fn scan_bluray_titles(
reader: &mut dyn SectorReader,
udf_fs: &udf::UdfFs,
) -> Vec<DiscTitle> {
let mut titles = Vec::new();
if let Some(playlist_dir) = udf_fs.find_dir("/BDMV/PLAYLIST") {
for entry in &playlist_dir.entries {
if !entry.is_dir && entry.name.to_lowercase().ends_with(".mpls") {
let path = format!("/BDMV/PLAYLIST/{}", entry.name);
if let Ok(mpls_data) = udf_fs.read_file(reader, &path) {
if let Some(title) =
Self::parse_playlist(reader, udf_fs, &entry.name, &mpls_data)
{
titles.push(title);
}
}
}
}
}
titles
}
pub(super) fn parse_playlist(
reader: &mut dyn SectorReader,
udf_fs: &udf::UdfFs,
filename: &str,
data: &[u8],
) -> Option<DiscTitle> {
let parsed = mpls::parse(data).ok()?;
// Calculate duration from play items
let duration_ticks: u64 = parsed
.play_items
.iter()
.map(|pi| (pi.out_time.saturating_sub(pi.in_time)) as u64)
.sum();
let duration_secs = duration_ticks as f64 / 45000.0;
// Skip very short playlists (< 30 seconds)
if duration_secs < 30.0 {
return None;
}
// Parse each clip for size, duration, and sector extents
let mut extents = Vec::new();
let mut total_size: u64 = 0;
let mut clips = Vec::with_capacity(parsed.play_items.len());
for play_item in &parsed.play_items {
let clip_dur = play_item.out_time.saturating_sub(play_item.in_time) as f64 / 45000.0;
let mut pkt_count: u32 = 0;
let clpi_path = format!("/BDMV/CLIPINF/{}.clpi", play_item.clip_id);
if let Ok(clpi_data) = udf_fs.read_file(reader, &clpi_path) {
if let Ok(clip_info) = clpi::parse(&clpi_data) {
pkt_count = clip_info.source_packet_count;
total_size += pkt_count as u64 * 192;
// Get m2ts file start LBA and compute extent from packet count.
// BD-ROM m2ts files are contiguous on disc (mastering requirement).
let m2ts_path = format!("/BDMV/STREAM/{}.m2ts", play_item.clip_id);
let file_lba = udf_fs.file_start_lba(reader, &m2ts_path).unwrap_or(0);
let total_bytes = pkt_count as u64 * 192;
let total_sectors = total_bytes.div_ceil(2048) as u32;
if total_sectors > 0 && file_lba > 0 {
extents.push(Extent {
start_lba: file_lba,
sector_count: total_sectors,
});
}
}
}
clips.push(Clip {
clip_id: play_item.clip_id.clone(),
in_time: play_item.in_time,
out_time: play_item.out_time,
duration_secs: clip_dur,
source_packets: pkt_count,
});
}
// Build streams from STN table
let streams: Vec<Stream> = parsed
.streams
.iter()
.filter_map(|s| {
// Skip empty/padding entries (coding_type 0x00)
if s.coding_type == 0 {
return None;
}
let codec = Codec::from_coding_type(s.coding_type);
match s.stream_type {
1 | 6 | 7 => Some(Stream::Video(VideoStream {
pid: s.pid,
codec,
resolution: format_resolution(s.video_format, s.video_rate),
frame_rate: format_framerate(s.video_rate),
hdr: match s.dynamic_range {
1 => HdrFormat::Hdr10,
2 => HdrFormat::DolbyVision,
_ => HdrFormat::Sdr,
},
color_space: match s.color_space {
1 => ColorSpace::Bt709,
2 => ColorSpace::Bt2020,
_ => ColorSpace::Unknown,
},
secondary: s.secondary,
label: match s.stream_type {
7 => "Dolby Vision EL".to_string(),
_ => String::new(),
},
})),
2 | 5 => {
// Guard: if coding_type is a subtitle codec (PGS 0x90/0x91),
// this is a misaligned stream -- treat as subtitle, not audio
if matches!(codec, Codec::Pgs) {
Some(Stream::Subtitle(SubtitleStream {
pid: s.pid,
codec,
language: s.language.clone(),
forced: false,
codec_data: None,
}))
} else {
Some(Stream::Audio(AudioStream {
pid: s.pid,
codec,
channels: format_channels(s.audio_format),
language: s.language.clone(),
sample_rate: format_samplerate(s.audio_rate),
secondary: s.stream_type == 5,
label: String::new(),
}))
}
}
3 => Some(Stream::Subtitle(SubtitleStream {
pid: s.pid,
codec,
language: s.language.clone(),
forced: false,
codec_data: None,
})),
// Stream type 4 = IG, unknown types -- skip
_ => None,
}
})
.collect();
// Convert marks to chapters (filter mark_type == 1 = chapter entry)
let first_in_time = parsed.play_items.first().map(|pi| pi.in_time).unwrap_or(0);
let chapters: Vec<Chapter> = parsed
.marks
.iter()
.filter(|m| m.mark_type == 1)
.enumerate()
.map(|(i, m)| {
let time_secs = (m.timestamp as f64 - first_in_time as f64) / 45000.0;
Chapter {
time_secs: if time_secs < 0.0 { 0.0 } else { time_secs },
name: format!("Chapter {}", i + 1),
}
})
.collect();
let playlist_num = filename.trim_end_matches(".mpls").trim_end_matches(".MPLS");
let playlist_id = playlist_num.parse::<u16>().unwrap_or(0);
Some(DiscTitle {
playlist: filename.to_string(),
playlist_id,
duration_secs,
size_bytes: total_size,
clips,
streams,
chapters,
extents,
content_format: ContentFormat::BdTs,
})
}
/// Read disc title from META/DL/bdmt_eng.xml (Blu-ray Disc Meta Table).
/// Prefers English, falls back to first available language.
/// Returns None if META directory is empty or XML has no usable title.
pub(super) fn read_meta_title(
reader: &mut dyn SectorReader,
udf_fs: &udf::UdfFs,
) -> Option<String> {
let meta_dir = udf_fs.find_dir("/BDMV/META")?;
for sub in &meta_dir.entries {
if !sub.is_dir {
continue;
}
let dl_path = format!("/BDMV/META/{}", sub.name);
if let Some(dl_dir) = udf_fs.find_dir(&dl_path) {
let xml_files: Vec<_> = dl_dir
.entries
.iter()
.filter(|e| !e.is_dir && e.name.to_lowercase().ends_with(".xml"))
.collect();
let eng = xml_files
.iter()
.find(|e| e.name.to_lowercase().contains("eng"));
let target = eng.or_else(|| xml_files.first());
if let Some(entry) = target {
let path = format!("{}/{}", dl_path, entry.name);
if let Ok(data) = udf_fs.read_file(reader, &path) {
let xml = String::from_utf8_lossy(&data);
if let Some(start) = xml.find("<di:name>") {
let s = start + "<di:name>".len();
if let Some(end) = xml[s..].find("</di:name>") {
let title = xml[s..s + end].trim().to_string();
if !title.is_empty() && title != "Blu-ray" {
return Some(title);
}
}
}
}
}
}
}
None
}
}