40 lines
1.5 KiB
Rust
40 lines
1.5 KiB
Rust
use build_const::ConstWriter;
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const SONG_SOURCE: &str = include_str!("lsdpack.s");
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fn main() {
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let mut consts = ConstWriter::for_build("lsdpack_bc")
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.unwrap()
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.finish_dependencies();
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let mut bytes: Vec<u8> = SONG_SOURCE
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.lines()
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.map(|s| s.trim().strip_prefix("DB "))
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.flatten() // filter to lines starting with DB
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.map(|s| {
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s.split_once(';')
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.unwrap_or((s, ""))
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.0 // remove comments
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.chars()
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.filter(|c| *c == ',' || c.is_ascii_hexdigit()) // remove spaces and dollars
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.collect::<String>()
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.split(',')
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.map(|s| u8::from_str_radix(s, 16).unwrap())
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.collect::<Vec<u8>>()
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})
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.flatten() // merge iterator of vectors
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.collect();
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let song_positions: Vec<usize> = SONG_SOURCE
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.lines()
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.map(|s| s.trim().strip_prefix("dw "))
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.flatten() // filter to lines from SongLocations
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.map(|s| usize::from_str_radix(s.split_once('$').unwrap().1, 16).unwrap() - 0x4000)
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.collect();
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// gba psg has inverted wave channel polarity
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for sample_pair in &mut bytes[0..*song_positions.iter().min().unwrap()] {
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// don't worry about carries, both nybbles are NYBBLE_MAX
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*sample_pair = 0xFF - *sample_pair;
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}
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consts.add_array("LSDPACK_DATA", "u8", &bytes);
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consts.add_array("LSDPACK_SONG_POSITIONS", "usize", &song_positions);
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}
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