79 lines
2.3 KiB
Rust
79 lines
2.3 KiB
Rust
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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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