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//! `TableId` enum: typed `table_id` byte values.
//!
//! Source: ETSI EN 300 468 §5.1.3 Table 2 plus ISO/IEC 13818-1 for MPEG tables.
use num_enum::TryFromPrimitive;
/// Typed `table_id` enumeration.
///
/// Variants use Rust CamelCase in 4.0. They intentionally do not carry the
/// `Section` suffix; that suffix belongs to parser types such as
/// [`crate::tables::nit::NitSection`].
///
/// Tables that occupy a range of values (EIT schedule 0x50..=0x5F and 0x60..=0x6F)
/// are not listed as enum variants; see [`Self::eit_schedule_actual_segment`] and
/// [`Self::eit_schedule_other_segment`] instead.
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, TryFromPrimitive)]
#[cfg_attr(feature = "serde", derive(serde::Serialize))]
#[repr(u8)]
#[non_exhaustive]
#[rustfmt::skip] // deliberate column-aligned discriminants
pub enum TableId {
// ── MPEG-2 tables ──────────────────────────────────────────────────────
/// `Pat` (table_id 0x00).
Pat = 0x00,
/// `Cat` (table_id 0x01).
Cat = 0x01,
/// `Pmt` (table_id 0x02).
Pmt = 0x02,
/// `TransportStreamDescription` (table_id 0x03).
TransportStreamDescription = 0x03,
/// `Iso14496SceneDescription` (table_id 0x04).
Iso14496SceneDescription = 0x04,
/// `Iso14496ObjectDescriptor` (table_id 0x05).
Iso14496ObjectDescriptor = 0x05,
/// `Metadata` (table_id 0x06).
Metadata = 0x06,
/// `Iso14496` (table_id 0x08).
Iso14496 = 0x08,
/// `GreenAccessUnit` (table_id 0x09).
GreenAccessUnit = 0x09,
// ── DVB SI tables ──────────────────────────────────────────────────────
/// `NetworkInformationActual` (table_id 0x40).
NetworkInformationActual = 0x40,
/// `NetworkInformationOther` (table_id 0x41).
NetworkInformationOther = 0x41,
/// `ServiceDescriptionActual` (table_id 0x42).
ServiceDescriptionActual = 0x42,
/// `ServiceDescriptionOther` (table_id 0x46).
ServiceDescriptionOther = 0x46,
/// `BouquetAssociation` (table_id 0x4A).
BouquetAssociation = 0x4A,
/// `UpdateNotification` (table_id 0x4B).
UpdateNotification = 0x4B,
/// `IpMacNotification` (table_id 0x4C).
IpMacNotification = 0x4C,
/// `SatelliteAccess` (table_id 0x4D).
SatelliteAccess = 0x4D,
/// `EventInformationPfActual` (table_id 0x4E).
EventInformationPfActual = 0x4E,
/// `EventInformationPfOther` (table_id 0x4F).
EventInformationPfOther = 0x4F,
// EIT schedule actual covers 0x50..=0x5F (16 segments).
// EIT schedule other covers 0x60..=0x6F.
/// `TimeAndDate` (table_id 0x70).
TimeAndDate = 0x70,
/// `RunningStatus` (table_id 0x71).
RunningStatus = 0x71,
/// `Stuffing` (table_id 0x72).
Stuffing = 0x72,
/// `TimeOffset` (table_id 0x73).
TimeOffset = 0x73,
/// `ApplicationInformation` (table_id 0x74).
ApplicationInformation = 0x74,
/// `Container` (table_id 0x75).
Container = 0x75,
/// `RelatedContent` (table_id 0x76).
RelatedContent = 0x76,
/// `ContentIdentifier` (table_id 0x77).
ContentIdentifier = 0x77,
/// `MpeFec` (table_id 0x78).
MpeFec = 0x78,
/// `ResolutionNotification` (table_id 0x79).
ResolutionNotification = 0x79,
/// `MpeIfec` (table_id 0x7A).
MpeIfec = 0x7A,
/// `ProtectionMessage` (table_id 0x7B).
ProtectionMessage = 0x7B,
/// `DownloadableFontInfo` (table_id 0x7C).
DownloadableFontInfo = 0x7C,
/// `DiscontinuityInformation` (table_id 0x7E).
DiscontinuityInformation = 0x7E,
/// `SelectionInformation` (table_id 0x7F).
SelectionInformation = 0x7F,
}
impl TableId {
/// Human-readable spec name.
#[must_use]
pub fn name(self) -> &'static str {
match self {
Self::Pat => "program_association_section",
Self::Cat => "conditional_access_section",
Self::Pmt => "program_map_section",
Self::TransportStreamDescription => "transport_stream_description_section",
Self::Iso14496SceneDescription => "ISO_IEC_14496_scene_description_section",
Self::Iso14496ObjectDescriptor => "ISO_IEC_14496_object_descriptor_section",
Self::Metadata => "Metadata_section",
Self::Iso14496 => "ISO_IEC_14496_section",
Self::GreenAccessUnit => "ISO/IEC 23001-11 green access unit section",
Self::NetworkInformationActual => "network_information_section - actual network",
Self::NetworkInformationOther => "network_information_section - other network",
Self::ServiceDescriptionActual => {
"service_description_section - actual DVB transport stream"
}
Self::ServiceDescriptionOther => {
"service_description_section - other DVB transport stream"
}
Self::BouquetAssociation => "bouquet_association_section",
Self::UpdateNotification => "update notification table section",
Self::IpMacNotification => "IP/MAC_notification_section",
Self::SatelliteAccess => "satellite_access_section",
Self::EventInformationPfActual => {
"event_information_section - actual DVB transport stream, present/following"
}
Self::EventInformationPfOther => {
"event_information_section - other DVB transport stream, present/following"
}
Self::TimeAndDate => "time_date_section",
Self::RunningStatus => "running_status_section",
Self::Stuffing => "stuffing_section",
Self::TimeOffset => "time_offset_section",
Self::ApplicationInformation => "application information section",
Self::Container => "container section",
Self::RelatedContent => "related content section",
Self::ContentIdentifier => "content identifier section",
Self::MpeFec => "MPE-FEC section",
Self::ResolutionNotification => "resolution provider notification section",
Self::MpeIfec => "MPE-IFEC section",
Self::ProtectionMessage => "protection message section",
Self::DownloadableFontInfo => "downloadable font info section",
Self::DiscontinuityInformation => "discontinuity_information_section",
Self::SelectionInformation => "selection_information_section",
}
}
/// If `v` is an EIT-schedule-actual `table_id` (0x50..=0x5F), return its
/// segment index 0..=15. Otherwise `None`.
#[must_use]
pub const fn eit_schedule_actual_segment(v: u8) -> Option<u8> {
if v >= 0x50 && v <= 0x5F {
Some(v - 0x50)
} else {
None
}
}
/// If `v` is an EIT-schedule-other `table_id` (0x60..=0x6F), return its
/// segment index 0..=15. Otherwise `None`.
#[must_use]
pub const fn eit_schedule_other_segment(v: u8) -> Option<u8> {
if v >= 0x60 && v <= 0x6F {
Some(v - 0x60)
} else {
None
}
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn known_values_round_trip() {
for id in [
TableId::Pat,
TableId::NetworkInformationActual,
TableId::ServiceDescriptionActual,
TableId::EventInformationPfActual,
TableId::TimeAndDate,
TableId::SelectionInformation,
] {
let byte = id as u8;
assert_eq!(TableId::try_from(byte), Ok(id));
}
}
#[test]
fn eit_schedule_actual_segment_range() {
assert_eq!(TableId::eit_schedule_actual_segment(0x4F), None);
assert_eq!(TableId::eit_schedule_actual_segment(0x50), Some(0));
assert_eq!(TableId::eit_schedule_actual_segment(0x5F), Some(0x0F));
assert_eq!(TableId::eit_schedule_actual_segment(0x60), None);
}
#[test]
fn eit_schedule_other_segment_range() {
assert_eq!(TableId::eit_schedule_other_segment(0x5F), None);
assert_eq!(TableId::eit_schedule_other_segment(0x60), Some(0));
assert_eq!(TableId::eit_schedule_other_segment(0x6F), Some(0x0F));
assert_eq!(TableId::eit_schedule_other_segment(0x70), None);
}
#[test]
fn unknown_value_rejected() {
assert!(matches!(
TableId::try_from(0x99),
Err(num_enum::TryFromPrimitiveError { .. })
));
}
#[test]
fn exhaustive_byte_sweep() {
let mut matched = 0u16;
for byte in 0u8..=0xFF {
if let Ok(id) = TableId::try_from(byte) {
assert_eq!(id as u8, byte, "round-trip failed for {byte:#04x}");
matched += 1;
}
}
// 34 defined variants (29 + the five typed MPEG-2 sections 0x04/05/06/08/09)
assert_eq!(matched, 34, "expected 34 matched variants");
}
}
broadcast_common::impl_spec_display!(TableId);