Add basic cue sheet handling
The cue sheet is printed to stdout.
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@ -0,0 +1,78 @@
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//! Module to extract the cue sheet from the NRG metadata.
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use ::error::NrgError;
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use ::metadata::metadata::NrgMetadata;
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pub fn write_cue_sheet(image_name: &String, nm: &NrgMetadata)
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-> Result<(), NrgError> {
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if nm.cuex_chunk.is_none() {
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return Err(NrgError::NoNrgCue);
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}
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let cuex_tracks = &nm.cuex_chunk.as_ref().unwrap().tracks;
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let file_name = try!(make_cue_sheet_name(image_name));
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println!("FILE \"{}\" RAW", image_name);
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let mut index0_pos = -1;
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for track in cuex_tracks {
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// Ignore lead-in and lead-out areas
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if track.track_number == 0 || track.track_number == 0xAA {
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continue;
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}
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// Ignore negative positions
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if track.position_sectors < 0 {
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continue;
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}
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// Store/skip index0
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if track.index_number == 0 {
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index0_pos = track.position_sectors;
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continue;
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}
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// Write track info
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println!(" TRACK {:02} AUDIO", track.track_number);
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// Write index0 if we stored it and it's before the current index's
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// position (i.e., it indicates a pre-gap)
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if index0_pos >= 0 && index0_pos < track.position_sectors {
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try!(write_cue_index(0, index0_pos));
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index0_pos = -1;
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}
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// Write current index
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try!(write_cue_index(track.index_number, track.position_sectors));
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}
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Ok(())
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}
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/// Generates the cue sheet's name from the NRG image's name.
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///
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/// If `image_name`'s extension is `.nrg` (case-insensitive), the cue sheet's
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/// name will be the same as `image_name` with a `.cue` extension instead of
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/// `.nrg`. Otherwise, the cue sheet's name will be `image_name.cue`.
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fn make_cue_sheet_name(image_name: &String) -> Result<String, NrgError> {
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Ok("image.cue".to_string())
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}
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fn write_cue_index(index: u8, position_sectors: i32)
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-> Result<(), NrgError> {
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assert!(position_sectors >= 0);
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// Audio CDs are played at a 75 sectors per second rate:
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let mut seconds: u32 = position_sectors as u32 / 75;
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let remaining_sectors = position_sectors % 75;
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let minutes = seconds / 60;
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seconds %= 60;
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println!(" INDEX {:02} {:02}:{:02}:{:02}",
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index, minutes, seconds, remaining_sectors);
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Ok(())
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}
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@ -11,6 +11,7 @@ pub enum NrgError {
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NrgFormat,
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NrgFormatV1,
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NrgChunkId,
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NoNrgCue,
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}
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impl fmt::Display for NrgError {
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@ -20,6 +21,7 @@ impl fmt::Display for NrgError {
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NrgError::NrgFormat => write!(f, "NRG format unknown."),
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NrgError::NrgFormatV1 => write!(f, "NRG v1 format is not handled."),
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NrgError::NrgChunkId => write!(f, "NRG chunk ID unknown."),
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NrgError::NoNrgCue => write!(f, "NRG cue sheet chunk absent."),
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}
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}
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}
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@ -31,6 +33,7 @@ impl Error for NrgError {
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NrgError::NrgFormat => "NRG format",
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NrgError::NrgFormatV1 => "NRG format v1",
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NrgError::NrgChunkId => "NRG chunk ID",
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NrgError::NoNrgCue => "No NRG cue",
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}
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}
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@ -40,6 +43,7 @@ impl Error for NrgError {
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NrgError::NrgFormat => None,
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NrgError::NrgFormatV1 => None,
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NrgError::NrgChunkId => None,
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NrgError::NoNrgCue => None,
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}
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}
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}
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@ -1,4 +1,5 @@
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//! Extracts audio data and metadata from an NRG image of an audio CD.
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pub mod metadata;
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pub mod error;
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pub mod metadata;
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pub mod cue_sheet;
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25
src/main.rs
25
src/main.rs
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@ -21,7 +21,7 @@ fn main() {
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exit_usage(&prog_name);
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}
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println!("NRG image name: {}", img_name);
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println!("NRG image name: \"{}\"", img_name);
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// We don't support more than one input file
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if argv.next().is_some() {
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@ -31,18 +31,25 @@ fn main() {
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// Open the image file
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let fd = File::open(&img_name);
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if fd.is_err() {
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println!("Can't open \"{}\": {}",
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println!("Can't open image file \"{}\": {}",
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img_name, fd.unwrap_err().to_string());
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process::exit(1);
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}
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let mut fd = fd.unwrap();
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// Read the image's metadata
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match nrgrip::metadata::read_nrg_metadata(&mut fd) {
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Err(err) => println!("Error reading \"{}\": {}",
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img_name, err.to_string()),
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Ok(metadata) => println!("\n\
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*** Metadata ***\n\
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{}", metadata),
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// Read and display the image's metadata
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let metadata = nrgrip::metadata::read_nrg_metadata(&mut fd);
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if metadata.is_err() {
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println!("Error reading \"{}\": {}",
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img_name, metadata.unwrap_err().to_string());
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process::exit(1);
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}
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let metadata = metadata.unwrap();
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println!("\n{}", metadata);
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// Read and write the cue sheet
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if let Err(err) = nrgrip::cue_sheet::write_cue_sheet(&img_name, &metadata) {
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println!("Error writing cue sheet: {}", err.to_string());
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process::exit(1);
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}
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}
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@ -5,7 +5,7 @@ use std::io::{Seek, SeekFrom};
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use ::error::NrgError;
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mod metadata;
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pub mod metadata;
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mod cuex;
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mod daox;
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mod sinf;
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