MattJackson
272215c551
Documentation: - docs/aacs.md — AACS encryption (1.0 + 2.0), key resolution, decrypt - docs/udf.md — UDF 2.50 filesystem with metadata partitions - docs/mpls.md — MPLS playlist format, STN stream table - docs/clpi.md — CLPI clip info, EP map, sector extents - docs/architecture.md — library module map, design principles - docs/drive-access.md — drive sessions, SCSI transport, unlock Code cleanup: - Zero compiler warnings - Removed all debug eprintln from library code - No hardcoded private paths — KEYDB tests use KEYDB_PATH env var - KEYDB search locations as named constants - drive.rs: extracted create_platform(), deduplicated open methods - lib.rs: updated doc examples to show Disc::scan() API - Fixed UDF file reads (partition_start, not metadata_start) - Exported KeySource from disc module
124 lines
3.9 KiB
Rust
124 lines
3.9 KiB
Rust
//! Drive speed control — query and set read speeds.
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//!
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//! Uses MMC-6 SET CD SPEED (0xBB) command.
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//! Reference: MMC-6 §6.30
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/// Disc read speed.
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#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
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pub enum DriveSpeed {
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/// Blu-ray 1x = 4,500 KB/s
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BD1x,
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/// Blu-ray 2x = 9,000 KB/s
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BD2x,
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/// Blu-ray 4x = 18,000 KB/s
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BD4x,
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/// Blu-ray 6x = 27,000 KB/s
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BD6x,
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/// Blu-ray 8x = 36,000 KB/s
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BD8x,
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/// Blu-ray 10x = 45,000 KB/s
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BD10x,
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/// Blu-ray 12x = 54,000 KB/s
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BD12x,
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/// DVD 1x = 1,385 KB/s
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DVD1x,
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/// DVD 2x = 2,770 KB/s
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DVD2x,
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/// DVD 4x = 5,540 KB/s
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DVD4x,
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/// DVD 8x = 11,080 KB/s
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DVD8x,
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/// DVD 16x = 22,160 KB/s
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DVD16x,
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/// Maximum speed — drive decides
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Max,
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}
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impl DriveSpeed {
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/// Convert to KB/s for MMC-6 SET CD SPEED command.
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pub fn to_kbps(self) -> u16 {
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match self {
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DriveSpeed::BD1x => 4_500,
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DriveSpeed::BD2x => 9_000,
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DriveSpeed::BD4x => 18_000,
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DriveSpeed::BD6x => 27_000,
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DriveSpeed::BD8x => 36_000,
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DriveSpeed::BD10x => 45_000,
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DriveSpeed::BD12x => 54_000,
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DriveSpeed::DVD1x => 1_385,
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DriveSpeed::DVD2x => 2_770,
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DriveSpeed::DVD4x => 5_540,
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DriveSpeed::DVD8x => 11_080,
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DriveSpeed::DVD16x => 22_160,
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DriveSpeed::Max => 0xFFFF,
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}
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}
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/// Create from KB/s value, rounding to nearest standard speed.
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pub fn from_kbps(kbps: u16) -> Self {
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match kbps {
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0..=2_000 => DriveSpeed::DVD1x,
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2_001..=4_000 => DriveSpeed::DVD2x,
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4_001..=6_000 => DriveSpeed::BD1x,
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6_001..=13_000 => DriveSpeed::BD2x,
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13_001..=22_000 => DriveSpeed::BD4x,
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22_001..=31_000 => DriveSpeed::BD6x,
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31_001..=40_000 => DriveSpeed::BD8x,
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40_001..=49_000 => DriveSpeed::BD10x,
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49_001..=u16::MAX => DriveSpeed::BD12x,
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}
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}
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/// Human-readable label.
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pub fn label(&self) -> &'static str {
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match self {
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DriveSpeed::BD1x => "BD 1x",
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DriveSpeed::BD2x => "BD 2x",
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DriveSpeed::BD4x => "BD 4x",
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DriveSpeed::BD6x => "BD 6x",
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DriveSpeed::BD8x => "BD 8x",
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DriveSpeed::BD10x => "BD 10x",
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DriveSpeed::BD12x => "BD 12x",
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DriveSpeed::DVD1x => "DVD 1x",
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DriveSpeed::DVD2x => "DVD 2x",
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DriveSpeed::DVD4x => "DVD 4x",
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DriveSpeed::DVD8x => "DVD 8x",
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DriveSpeed::DVD16x => "DVD 16x",
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DriveSpeed::Max => "Max",
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}
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}
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/// All standard Blu-ray speeds.
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pub fn all_bd() -> &'static [DriveSpeed] {
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&[DriveSpeed::BD1x, DriveSpeed::BD2x, DriveSpeed::BD4x,
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DriveSpeed::BD6x, DriveSpeed::BD8x, DriveSpeed::BD10x, DriveSpeed::BD12x]
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}
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/// All standard DVD speeds.
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pub fn all_dvd() -> &'static [DriveSpeed] {
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&[DriveSpeed::DVD1x, DriveSpeed::DVD2x, DriveSpeed::DVD4x,
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DriveSpeed::DVD8x, DriveSpeed::DVD16x]
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}
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}
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impl std::fmt::Display for DriveSpeed {
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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write!(f, "{} ({} KB/s)", self.label(), self.to_kbps())
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}
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}
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/// Build SET CD SPEED CDB — MMC-6 §6.30
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pub fn set_cd_speed_cdb(read_speed: DriveSpeed) -> [u8; 12] {
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let kbps = read_speed.to_kbps();
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[
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0xBB, // SET CD SPEED opcode
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0x00, // reserved
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(kbps >> 8) as u8, // read speed MSB
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kbps as u8, // read speed LSB
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0xFF, // write speed MSB (0xFFFF = don't change)
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0xFF, // write speed LSB
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0x00, 0x00, 0x00, 0x00, // reserved
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0x00, 0x00, // reserved
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]
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}
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