Switch from nom to custom parser
The reason for the switch is mostly related to error handling (and me being unable to unterstand how nom does it). Using byteorder and a few handwritten helper functions for parsing makes error handling much easier. It also allows me to return more helpful error messages.master
parent
2b0b66ddca
commit
5a77d86fe7
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@ -21,12 +21,6 @@ version = "1.0.31"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "85bb70cc08ec97ca5450e6eba421deeea5f172c0fc61f78b5357b2a8e8be195f"
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[[package]]
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name = "arrayvec"
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version = "0.5.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "cff77d8686867eceff3105329d4698d96c2391c176d5d03adc90c7389162b5b8"
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[[package]]
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name = "atty"
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version = "0.2.14"
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@ -58,7 +52,6 @@ dependencies = [
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"byteorder",
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"clap",
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"log",
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"nom",
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"num-derive",
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"num-traits",
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"pretty_env_logger",
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@ -186,19 +179,6 @@ version = "1.4.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
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[[package]]
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name = "lexical-core"
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version = "0.7.4"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "db65c6da02e61f55dae90a0ae427b2a5f6b3e8db09f58d10efab23af92592616"
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dependencies = [
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"arrayvec",
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"bitflags",
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"cfg-if",
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"ryu",
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"static_assertions",
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]
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[[package]]
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name = "libc"
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version = "0.2.71"
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@ -229,17 +209,6 @@ dependencies = [
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"adler32",
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]
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[[package]]
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name = "nom"
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version = "5.1.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "ffb4262d26ed83a1c0a33a38fe2bb15797329c85770da05e6b828ddb782627af"
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dependencies = [
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"lexical-core",
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"memchr",
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"version_check",
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]
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[[package]]
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name = "num-derive"
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version = "0.3.0"
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@ -350,18 +319,6 @@ version = "0.6.18"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "26412eb97c6b088a6997e05f69403a802a92d520de2f8e63c2b65f9e0f47c4e8"
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[[package]]
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name = "ryu"
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version = "1.0.5"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "71d301d4193d031abdd79ff7e3dd721168a9572ef3fe51a1517aba235bd8f86e"
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[[package]]
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name = "static_assertions"
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version = "1.1.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "a2eb9349b6444b326872e140eb1cf5e7c522154d69e7a0ffb0fb81c06b37543f"
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[[package]]
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name = "strsim"
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version = "0.10.0"
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@ -9,7 +9,6 @@ anyhow = "^1.0.31"
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byteorder = "^1.3.4"
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clap = "3.0.0-beta.1"
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log = "^0.4.8"
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nom = "^5.1.1"
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num-derive = "^0.3"
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num-traits = "^0.2"
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pretty_env_logger = "^0.4"
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@ -385,7 +385,7 @@ impl ssq::SSQ {
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let mut shock_step_generator =
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ShockStepGenerator::new(chart.difficulty.players * 4, config.shock_action.clone());
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for step in &chart.steps.0 {
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for step in &chart.steps {
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trace!("Converting {:?} to hit object", step);
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if let Some(mut step_hit_objects) = step.to_hit_objects(
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chart.difficulty.players * 4,
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610
src/ddr/ssq.rs
610
src/ddr/ssq.rs
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@ -1,331 +1,38 @@
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use std::convert::From;
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use std::convert::TryInto;
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use std::fmt;
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use std::io;
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use std::io::prelude::*;
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use std::io::Cursor;
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use anyhow::Result;
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use byteorder::{ReadBytesExt, LE};
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use log::{debug, info, trace, warn};
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use nom::bytes::complete::take;
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use nom::multi::many0;
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use nom::number::complete::{le_i16, le_i32, le_u16};
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use nom::IResult;
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use thiserror::Error;
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use crate::mini_parser::{MiniParser, MiniParserError};
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use crate::utils;
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use crate::utils::exec_nom_parser;
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const MEASURE_LENGTH: i32 = 4096;
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const FREEZE: bool = false;
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// Convert time offset to beats
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// time offset is the measure times MEASURE_LENGTH
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#[derive(Error, Debug)]
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pub enum Error {
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#[error("Not enough freeze data was found")]
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NotEnoughFreezeData,
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#[error(transparent)]
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IOError(#[from] io::Error),
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#[error(transparent)]
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TryFromIntError(#[from] std::num::TryFromIntError),
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#[error(transparent)]
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MiniParserError(#[from] MiniParserError),
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}
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/// Convert time offset to beats
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/// time offset is the measure times MEASURE_LENGTH
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fn measure_to_beats(metric: i32) -> f32 {
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4.0 * metric as f32 / MEASURE_LENGTH as f32
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}
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fn parse_n_i32(n: usize, input: &[u8]) -> IResult<&[u8], Vec<i32>> {
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let (input, bytes) = take(n as usize * 4)(input)?;
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let (unprocessed_input, values) = many0(le_i32)(bytes)?;
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assert_eq!(unprocessed_input.len(), 0);
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Ok((input, values))
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}
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fn parse_usize(input: &[u8]) -> IResult<&[u8], usize> {
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let (input, value) = le_i32(input)?;
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Ok((input, value as usize))
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}
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#[derive(Clone, Debug, PartialEq)]
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pub struct TempoChange {
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pub start_ms: i32,
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pub start_beats: f32,
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pub end_beats: f32,
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pub beat_length: f32,
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}
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#[derive(Clone, Debug, PartialEq)]
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pub struct TempoChanges(pub Vec<TempoChange>);
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impl TempoChanges {
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fn parse(ticks_per_second: i32, input: &[u8]) -> IResult<&[u8], Self> {
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let (input, count) = parse_usize(input)?;
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let (input, measure) = parse_n_i32(count, input)?;
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let (input, tempo_data) = parse_n_i32(count, input)?;
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let mut entries = Vec::new();
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let mut elapsed_ms = 0;
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let mut elapsed_beats = 0.0;
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for i in 1..count {
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let delta_measure = measure[i] - measure[i - 1];
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let delta_ticks = tempo_data[i] - tempo_data[i - 1];
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let length_ms = 1000 * delta_ticks / ticks_per_second;
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let length_beats = measure_to_beats(delta_measure);
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let beat_length = length_ms as f32 / length_beats;
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let entry = TempoChange {
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start_ms: elapsed_ms,
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start_beats: elapsed_beats,
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end_beats: elapsed_beats + length_beats,
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beat_length,
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};
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entries.push(entry);
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elapsed_ms += length_ms;
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elapsed_beats += length_beats;
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}
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Ok((input, Self(entries)))
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}
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}
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#[derive(Clone, Debug, PartialEq)]
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pub enum Step {
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Step { beats: f32, row: Row },
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Freeze { start: f32, end: f32, row: Row },
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Shock { beats: f32 },
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}
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#[derive(Clone, Debug, PartialEq)]
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pub struct Steps(pub Vec<Step>);
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impl Steps {
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fn parse(input: &[u8], players: u8) -> IResult<&[u8], Self> {
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let (input, count) = parse_usize(input)?;
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let (input, measure) = parse_n_i32(count, input)?;
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let (input, steps) = take(count)(input)?;
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// freeze data can be padded with zeroes
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let (input, freeze_data) = take(input.len())(input)?;
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let mut freeze = freeze_data.iter().skip_while(|x| **x == 0).copied();
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let mut parsed_steps = Vec::new();
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for i in 0..count {
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let beats = measure_to_beats(measure[i]);
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// check if either all eight bits are set (shock for double) or the first four (shock for
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// single)
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if steps[i] == 0xff || steps[i] == 0xf {
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// shock
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trace!("Shock arrow at {}", beats);
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parsed_steps.push(Step::Shock { beats });
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} else if steps[i] == 0x00 {
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// extra data
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let columns = freeze.next().unwrap();
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let extra_type = freeze.next().unwrap();
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if extra_type == 1 {
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// freeze end (start is the last normal step in that column)
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trace!("Freeze arrow at {}", beats);
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let row = Row::new(columns, players);
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if row.count_active() != 1 {
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warn!("Found freeze with not exactly one column, which is not implemented, skipping");
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continue;
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}
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if FREEZE {
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match Self::find_last(Self(parsed_steps.clone()), &row) {
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Some(last_step) => {
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parsed_steps.push(Step::Freeze {
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start: if let Step::Step { beats, .. } = parsed_steps[last_step]
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{
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beats
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} else {
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unreachable!()
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},
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end: beats,
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row,
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});
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parsed_steps.remove(last_step);
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}
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None => {
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warn!(
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"Could not find previous step for freeze, adding normal step"
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);
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parsed_steps.push(Step::Step { beats, row });
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}
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}
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} else {
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trace!("Freeze disabled, adding normal step");
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parsed_steps.push(Step::Step { beats, row });
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}
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} else {
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debug!(
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"Encountered unknown extra step with type {}, ignoring",
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extra_type
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);
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}
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} else {
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// normal step
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trace!("Normal step at {}", beats);
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parsed_steps.push(Step::Step {
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beats,
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row: Row::new(steps[i], players),
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});
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}
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}
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debug!("Parsed {} steps", parsed_steps.len());
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Ok((input, Self(parsed_steps)))
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}
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fn find_last(steps: Self, row: &Row) -> Option<usize> {
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for i in (0..steps.0.len()).rev() {
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if let Step::Step { row: step_row, .. } = &steps.0[i] {
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if step_row.clone().intersects(row.clone()) {
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return Some(i);
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}
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}
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}
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None
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}
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}
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#[derive(Clone, Debug, PartialEq)]
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pub struct Difficulty {
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pub players: u8,
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difficulty: u8,
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}
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impl From<u16> for Difficulty {
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fn from(parameter: u16) -> Self {
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Self {
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difficulty: ((parameter & 0xFF00) >> 8) as u8,
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players: (parameter & 0xF) as u8 / 4,
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}
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}
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}
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impl Into<f32> for Difficulty {
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fn into(self) -> f32 {
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match self.difficulty {
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1 => 0.25,
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2 => 0.5,
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3 => 1.0,
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4 => 0.0,
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6 => 0.75,
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_ => 1.0,
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}
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}
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}
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impl fmt::Display for Difficulty {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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let players = match self.players {
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1 => "Single",
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2 => "Double",
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_ => "Unknown Number of Players",
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};
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let difficulty = match self.difficulty {
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1 => "Basic",
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2 => "Difficult",
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3 => "Challenge",
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4 => "Beginner",
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6 => "Expert",
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_ => "Unknown Difficulty",
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};
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write!(f, "{} {}", players, difficulty)
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}
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}
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#[derive(Clone, Debug, PartialEq)]
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pub struct Chart {
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pub difficulty: Difficulty,
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pub steps: Steps,
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}
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#[derive(Clone, Debug, PartialEq)]
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pub struct SSQ {
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pub tempo_changes: TempoChanges,
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pub charts: Vec<Chart>,
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}
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impl From<Chunks> for SSQ {
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fn from(chunks: Chunks) -> Self {
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let mut ssq = Self {
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tempo_changes: TempoChanges(Vec::new()),
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charts: Vec::new(),
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};
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for chunk in chunks.0 {
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match chunk {
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Chunk::TempoChanges(mut tempo_changes) => {
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ssq.tempo_changes.0.append(&mut tempo_changes.0)
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}
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Chunk::Chart(chart) => ssq.charts.push(chart),
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Chunk::Extra(..) => {}
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}
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}
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info!("Parsed {} charts", ssq.charts.len());
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ssq
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}
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}
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impl SSQ {
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pub fn parse(data: &[u8]) -> Result<Self> {
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debug!(
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"Configuration: measure length: {}, use freezes: {}",
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MEASURE_LENGTH, FREEZE
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);
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let chunks = exec_nom_parser(Chunks::parse, data)?;
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Ok(Self::from(chunks))
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}
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}
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#[derive(Clone, Debug, PartialEq)]
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enum Chunk {
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Chart(Chart),
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TempoChanges(TempoChanges),
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Extra(Vec<u8>),
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}
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impl Chunk {
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fn parse(input: &[u8]) -> IResult<&[u8], Self> {
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let (input, length) = le_i32(input)?;
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let (input, chunk_type) = le_i16(input)?;
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let (input, parameter) = le_u16(input)?;
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// length without i32 and 2 × i16
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let (input, data) = take(length as usize - 8)(input)?;
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let chunk = match chunk_type {
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1 => {
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debug!("Parsing tempo changes (ticks/s: {})", parameter);
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let (_, TempoChanges(tempo_changes)) = TempoChanges::parse(parameter as i32, data)?;
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Self::TempoChanges(TempoChanges(tempo_changes))
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}
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3 => {
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let difficulty = Difficulty::from(parameter);
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debug!("Parsing step chunk ({})", difficulty);
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let (_, steps) = Steps::parse(data, difficulty.players)?;
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Self::Chart(Chart { difficulty, steps })
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}
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_ => {
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debug!("Found extra chunk (length {})", data.len());
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Self::Extra(data.to_vec())
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}
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};
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Ok((input, chunk))
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}
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}
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pub struct Chunks(Vec<Chunk>);
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impl Chunks {
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fn parse(input: &[u8]) -> IResult<&[u8], Self> {
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let (input, chunks) = many0(Chunk::parse)(input)?;
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Ok((input, Self(chunks)))
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}
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}
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#[derive(Debug, Clone, PartialEq)]
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pub struct PlayerRow {
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pub left: bool,
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@ -420,3 +127,278 @@ impl Row {
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false
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}
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}
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#[derive(Clone, Debug, PartialEq)]
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pub struct TempoChange {
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pub start_ms: i32,
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pub start_beats: f32,
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pub end_beats: f32,
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pub beat_length: f32,
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}
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#[derive(Clone, Debug, PartialEq)]
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pub struct TempoChanges(pub Vec<TempoChange>);
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impl TempoChanges {
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fn parse(ticks_per_second: i32, data: &[u8]) -> Result<Self, Error> {
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let mut cursor = Cursor::new(data);
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|
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let count = cursor.read_u32::<LE>()?.try_into()?;
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let measure = cursor.read_n_u32(count)?;
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let tempo_data = cursor.read_n_u32(count)?;
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let mut entries = Vec::new();
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let mut elapsed_ms = 0;
|
||||
let mut elapsed_beats = 0.0;
|
||||
for i in 1..count {
|
||||
let delta_measure = measure[i] - measure[i - 1];
|
||||
let delta_ticks = tempo_data[i] - tempo_data[i - 1];
|
||||
|
||||
let length_ms = 1000 * delta_ticks / ticks_per_second;
|
||||
let length_beats = measure_to_beats(delta_measure);
|
||||
|
||||
let beat_length = length_ms as f32 / length_beats;
|
||||
|
||||
let entry = TempoChange {
|
||||
start_ms: elapsed_ms,
|
||||
start_beats: elapsed_beats,
|
||||
end_beats: elapsed_beats + length_beats,
|
||||
beat_length,
|
||||
};
|
||||
|
||||
entries.push(entry);
|
||||
|
||||
elapsed_ms += length_ms;
|
||||
elapsed_beats += length_beats;
|
||||
}
|
||||
|
||||
Ok(Self(entries))
|
||||
}
|
||||
}
|
||||
|
||||
#[derive(Clone, Debug, PartialEq)]
|
||||
pub enum Step {
|
||||
Step { beats: f32, row: Row },
|
||||
Freeze { start: f32, end: f32, row: Row },
|
||||
Shock { beats: f32 },
|
||||
}
|
||||
|
||||
#[derive(Clone, Debug, PartialEq)]
|
||||
pub struct Chart {
|
||||
pub difficulty: Difficulty,
|
||||
pub steps: Vec<Step>,
|
||||
}
|
||||
|
||||
impl Chart {
|
||||
fn parse(data: &[u8], parameter: u16) -> Result<Self, Error> {
|
||||
let difficulty: Difficulty = parameter.into();
|
||||
|
||||
let mut cursor = Cursor::new(data);
|
||||
|
||||
let count = cursor.read_u32::<LE>()?.try_into()?;
|
||||
let measures = cursor.read_n_u32(count)?;
|
||||
let mut steps = vec![0; count];
|
||||
cursor.read_exact(&mut steps)?;
|
||||
|
||||
let mut freeze_data = Vec::new();
|
||||
cursor.read_to_end(&mut freeze_data)?;
|
||||
// freeze data can be padded with zeroes
|
||||
let mut freeze_data = freeze_data.iter().skip_while(|x| **x == 0).copied();
|
||||
|
||||
let mut parsed_steps = Vec::new();
|
||||
|
||||
for step in 0..count {
|
||||
let beats = measure_to_beats(measures[step]);
|
||||
|
||||
// check if either all eight bits are set (shock for double) or the first four (shock for
|
||||
// single)
|
||||
if steps[step] == 0xff || steps[step] == 0xf {
|
||||
// shock
|
||||
trace!("Shock arrow at {}", beats);
|
||||
|
||||
parsed_steps.push(Step::Shock { beats });
|
||||
} else if steps[step] == 0x00 {
|
||||
// extra data
|
||||
let columns = freeze_data.next().ok_or(Error::NotEnoughFreezeData)?;
|
||||
let extra_type = freeze_data.next().ok_or(Error::NotEnoughFreezeData)?;
|
||||
|
||||
if extra_type == 1 {
|
||||
// freeze end (start is the last normal step in that column)
|
||||
trace!("Freeze arrow at {}", beats);
|
||||
|
||||
let row = Row::new(columns, difficulty.players);
|
||||
if row.count_active() != 1 {
|
||||
warn!("Found freeze with not exactly one column, which is not implemented, skipping");
|
||||
continue;
|
||||
}
|
||||
|
||||
if FREEZE {
|
||||
match Self::find_last(parsed_steps.clone(), &row) {
|
||||
Some(last_step) => {
|
||||
parsed_steps.push(Step::Freeze {
|
||||
start: if let Step::Step { beats, .. } = parsed_steps[last_step]
|
||||
{
|
||||
beats
|
||||
} else {
|
||||
unreachable!()
|
||||
},
|
||||
end: beats,
|
||||
row,
|
||||
});
|
||||
|
||||
parsed_steps.remove(last_step);
|
||||
}
|
||||
None => {
|
||||
warn!(
|
||||
"Could not find previous step for freeze, adding normal step"
|
||||
);
|
||||
parsed_steps.push(Step::Step { beats, row });
|
||||
}
|
||||
}
|
||||
} else {
|
||||
trace!("Freeze disabled, adding normal step");
|
||||
parsed_steps.push(Step::Step { beats, row });
|
||||
}
|
||||
} else {
|
||||
debug!(
|
||||
"Encountered unknown extra step with type {}, ignoring",
|
||||
extra_type
|
||||
);
|
||||
}
|
||||
} else {
|
||||
// normal step
|
||||
trace!("Normal step at {}", beats);
|
||||
|
||||
parsed_steps.push(Step::Step {
|
||||
beats,
|
||||
row: Row::new(steps[step], difficulty.players),
|
||||
});
|
||||
}
|
||||
}
|
||||
|
||||
debug!("Parsed {} steps", parsed_steps.len());
|
||||
|
||||
Ok(Self {
|
||||
difficulty,
|
||||
steps: parsed_steps,
|
||||
})
|
||||
}
|
||||
|
||||
fn find_last(steps: Vec<Step>, row: &Row) -> Option<usize> {
|
||||
for i in (0..steps.len()).rev() {
|
||||
if let Step::Step { row: step_row, .. } = &steps[i] {
|
||||
if step_row.clone().intersects(row.clone()) {
|
||||
return Some(i);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
None
|
||||
}
|
||||
}
|
||||
|
||||
#[derive(Clone, Debug, PartialEq)]
|
||||
pub struct Difficulty {
|
||||
pub players: u8,
|
||||
difficulty: u8,
|
||||
}
|
||||
|
||||
impl From<u16> for Difficulty {
|
||||
fn from(parameter: u16) -> Self {
|
||||
Self {
|
||||
difficulty: ((parameter & 0xFF00) >> 8) as u8,
|
||||
players: (parameter & 0xF) as u8 / 4,
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl Into<f32> for Difficulty {
|
||||
fn into(self) -> f32 {
|
||||
match self.difficulty {
|
||||
1 => 0.25,
|
||||
2 => 0.5,
|
||||
3 => 1.0,
|
||||
4 => 0.0,
|
||||
6 => 0.75,
|
||||
_ => 1.0,
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl fmt::Display for Difficulty {
|
||||
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
|
||||
let players = match self.players {
|
||||
1 => "Single",
|
||||
2 => "Double",
|
||||
_ => "Unknown Number of Players",
|
||||
};
|
||||
let difficulty = match self.difficulty {
|
||||
1 => "Basic",
|
||||
2 => "Difficult",
|
||||
3 => "Challenge",
|
||||
4 => "Beginner",
|
||||
6 => "Expert",
|
||||
_ => "Unknown Difficulty",
|
||||
};
|
||||
write!(f, "{} {}", players, difficulty)
|
||||
}
|
||||
}
|
||||
|
||||
#[derive(Clone, Debug, PartialEq)]
|
||||
pub struct SSQ {
|
||||
pub tempo_changes: TempoChanges,
|
||||
pub charts: Vec<Chart>,
|
||||
}
|
||||
|
||||
impl SSQ {
|
||||
pub fn parse(data: &[u8]) -> Result<Self, Error> {
|
||||
debug!(
|
||||
"Configuration: measure length: {}, use freezes: {}",
|
||||
MEASURE_LENGTH, FREEZE
|
||||
);
|
||||
let mut cursor = Cursor::new(data);
|
||||
|
||||
let mut ssq = Self {
|
||||
tempo_changes: TempoChanges(Vec::new()),
|
||||
charts: Vec::new(),
|
||||
};
|
||||
|
||||
loop {
|
||||
let length = cursor.read_i32::<LE>()? as usize;
|
||||
trace!("Found chunk (length {})", length);
|
||||
if length == 0 {
|
||||
break;
|
||||
}
|
||||
|
||||
let chunk_type = cursor.read_u16::<LE>()?;
|
||||
let parameter = cursor.read_u16::<LE>()?;
|
||||
|
||||
// length without i32 and 2 × i16
|
||||
let mut data = vec![0; length - 8];
|
||||
cursor.read_exact(&mut data)?;
|
||||
|
||||
match chunk_type {
|
||||
1 => {
|
||||
debug!("Parsing tempo changes (ticks/s: {})", parameter);
|
||||
ssq.tempo_changes = TempoChanges::parse(parameter as i32, &data)?;
|
||||
}
|
||||
3 => {
|
||||
debug!("Parsing step chunk ({})", Difficulty::from(parameter));
|
||||
ssq.charts.push(Chart::parse(&data, parameter)?)
|
||||
}
|
||||
_ => {
|
||||
debug!(
|
||||
"Found extra chunk (type {}, length {})",
|
||||
chunk_type,
|
||||
data.len()
|
||||
);
|
||||
}
|
||||
};
|
||||
}
|
||||
|
||||
info!("Parsed {} charts", ssq.charts.len());
|
||||
|
||||
Ok(ssq)
|
||||
}
|
||||
}
|
||||
|
|
|
|||
|
|
@ -1,5 +1,6 @@
|
|||
pub mod converter;
|
||||
pub mod ddr;
|
||||
mod mini_parser;
|
||||
pub mod osu;
|
||||
mod utils;
|
||||
pub mod xact3;
|
||||
|
|
|
|||
|
|
@ -0,0 +1,53 @@
|
|||
use std::convert::TryInto;
|
||||
use std::io;
|
||||
use std::io::prelude::*;
|
||||
use std::num;
|
||||
use std::ops::Range;
|
||||
|
||||
use thiserror::Error;
|
||||
|
||||
#[derive(Error, Debug)]
|
||||
pub enum MiniParserError {
|
||||
#[error(transparent)]
|
||||
TryFromIntError(#[from] num::TryFromIntError),
|
||||
#[error(transparent)]
|
||||
IOError(#[from] io::Error),
|
||||
}
|
||||
|
||||
/// Provides convenience methods for parsing binary formats.
|
||||
pub trait MiniParser: io::Read {
|
||||
/// Read a `String` of length `length` and strip NUL bytes.
|
||||
#[inline]
|
||||
fn read_string(&mut self, length: usize) -> Result<String, MiniParserError> {
|
||||
let mut buf = String::new();
|
||||
self.take(length.try_into()?).read_to_string(&mut buf)?;
|
||||
Ok(buf.replace("\0", ""))
|
||||
}
|
||||
|
||||
/// Read `n` `u32`.
|
||||
#[inline]
|
||||
fn read_n_u32(&mut self, n: usize) -> Result<Vec<i32>, MiniParserError> {
|
||||
let mut buf = vec![0; 4 * n];
|
||||
self.read_exact(&mut buf)?;
|
||||
Ok(buf
|
||||
.chunks_exact(4)
|
||||
.map(|x| x.try_into().unwrap()) // chunks are guarenteed to be of size 4
|
||||
.map(i32::from_le_bytes)
|
||||
.collect::<Vec<i32>>())
|
||||
}
|
||||
}
|
||||
|
||||
/// Implement MiniParser for all io::Read implementors.
|
||||
impl<R: io::Read + ?Sized> MiniParser for R {}
|
||||
|
||||
/// Gets the requested `range` from `slice` and errors with `UnexpectedEof` when range does not fit
|
||||
/// in slice.
|
||||
pub fn get_slice_range(slice: &[u8], range: Range<usize>) -> Result<&[u8], MiniParserError> {
|
||||
slice.get(range).ok_or_else(|| {
|
||||
io::Error::new(
|
||||
io::ErrorKind::UnexpectedEof,
|
||||
"File ended while there was data left to process",
|
||||
)
|
||||
.into()
|
||||
})
|
||||
}
|
||||
28
src/utils.rs
28
src/utils.rs
|
|
@ -1,6 +1,3 @@
|
|||
use anyhow::{anyhow, Result};
|
||||
use log::debug;
|
||||
|
||||
pub fn get_nth_bit(byte: u8, n: u8) -> bool {
|
||||
((byte & (0b1 << n)) >> n) != 0
|
||||
}
|
||||
|
|
@ -12,28 +9,3 @@ pub fn byte_to_bitarray(byte: u8) -> [bool; 8] {
|
|||
}
|
||||
bitarray
|
||||
}
|
||||
|
||||
pub fn offset_length_to_start_end(offset: usize, length: usize) -> (usize, usize) {
|
||||
(offset, offset + length)
|
||||
}
|
||||
|
||||
// This probably isn’t the right way to do this, but after countless attempts to implement
|
||||
// error conversion (IResult to anyhow::Result) it was the only thing I could come up with.
|
||||
pub fn exec_nom_parser<'a, F, R>(func: F, input: &'a [u8]) -> Result<R>
|
||||
where
|
||||
F: Fn(&'a [u8]) -> nom::IResult<&[u8], R>,
|
||||
{
|
||||
match func(input) {
|
||||
Ok((unprocessed, result)) => {
|
||||
if !unprocessed.is_empty() {
|
||||
debug!(
|
||||
"Parser returned {} bytes of unprocessed input: {:?}",
|
||||
unprocessed.len(),
|
||||
unprocessed
|
||||
);
|
||||
}
|
||||
Ok(result)
|
||||
}
|
||||
Err(error) => Err(anyhow!("Nom returned error: {}", error)),
|
||||
}
|
||||
}
|
||||
|
|
|
|||
206
src/xact3/xwb.rs
206
src/xact3/xwb.rs
|
|
@ -1,25 +1,28 @@
|
|||
use std::collections::HashMap;
|
||||
use std::convert::TryInto;
|
||||
use std::io;
|
||||
use std::io::Cursor;
|
||||
|
||||
use anyhow::Result;
|
||||
use log::{debug, info, warn};
|
||||
use nom::bytes::complete::tag;
|
||||
use nom::error::ParseError;
|
||||
use nom::multi::count;
|
||||
use nom::number::complete::{le_i32, le_u32};
|
||||
use nom::{take_str, IResult};
|
||||
use byteorder::{ReadBytesExt, LE};
|
||||
use log::{debug, info, trace, warn};
|
||||
use num_derive::FromPrimitive;
|
||||
use num_traits::FromPrimitive;
|
||||
use thiserror::Error;
|
||||
|
||||
use crate::utils;
|
||||
use crate::utils::exec_nom_parser;
|
||||
use crate::mini_parser;
|
||||
use crate::mini_parser::{MiniParser, MiniParserError};
|
||||
use crate::xact3::adpcm;
|
||||
|
||||
#[derive(Error, Debug)]
|
||||
pub enum Error {
|
||||
#[error("{0:?} is not a supported format")]
|
||||
UnsupportedFormat(FormatTag),
|
||||
#[error("Invalid magic: expected “WBND”, found “{0}”")]
|
||||
InvalidMagic(String),
|
||||
#[error(transparent)]
|
||||
IOError(#[from] io::Error),
|
||||
#[error(transparent)]
|
||||
MiniParserError(#[from] MiniParserError),
|
||||
}
|
||||
|
||||
#[derive(Clone, FromPrimitive, Debug, PartialEq)]
|
||||
|
|
@ -41,7 +44,7 @@ struct Format {
|
|||
impl From<u32> for Format {
|
||||
fn from(format: u32) -> Self {
|
||||
Self {
|
||||
tag: FormatTag::from_u32(format & ((1 << 2) - 1)).unwrap(),
|
||||
tag: FormatTag::from_u32(format & ((1 << 2) - 1)).unwrap(), // all 2 bit ints covered
|
||||
channels: ((format >> 2) & ((1 << 3) - 1)) as u16,
|
||||
sample_rate: (format >> 5) & ((1 << 18) - 1),
|
||||
alignment: ((format >> 23) & ((1 << 8) - 1)) as u8,
|
||||
|
|
@ -75,21 +78,13 @@ impl TryInto<adpcm::WaveFormat> for Format {
|
|||
|
||||
#[derive(Debug)]
|
||||
struct SegmentPosition {
|
||||
start: usize,
|
||||
end: usize,
|
||||
offset: usize,
|
||||
length: usize,
|
||||
}
|
||||
|
||||
impl SegmentPosition {
|
||||
fn get_from<'a>(&self, data: &'a [u8]) -> &'a [u8] {
|
||||
&data[self.start..self.end]
|
||||
}
|
||||
|
||||
fn parse<'a, E: ParseError<&'a [u8]>>(input: &'a [u8]) -> IResult<&[u8], Self, E> {
|
||||
let (input, offset) = le_u32(input)?;
|
||||
let (input, length) = le_u32(input)?;
|
||||
|
||||
let (start, end) = utils::offset_length_to_start_end(offset as usize, length as usize);
|
||||
Ok((input, Self { start, end }))
|
||||
fn get_from<'a>(&self, data: &'a [u8]) -> Result<&'a [u8], MiniParserError> {
|
||||
mini_parser::get_slice_range(data, self.offset..self.offset + self.length)
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -98,20 +93,31 @@ struct Header {
|
|||
}
|
||||
|
||||
impl Header {
|
||||
fn parse(input: &[u8]) -> IResult<&[u8], Self> {
|
||||
let (input, _magic) = tag("WBND")(input)?;
|
||||
let (input, version) = le_u32(input)?;
|
||||
fn parse(data: &[u8]) -> Result<Self, Error> {
|
||||
let mut cursor = Cursor::new(data);
|
||||
|
||||
let magic = cursor.read_string(4)?;
|
||||
if magic != "WBND" {
|
||||
return Err(Error::InvalidMagic(magic));
|
||||
}
|
||||
|
||||
let version = cursor.read_u32::<LE>()?;
|
||||
debug!("Recognised file (version {})", version);
|
||||
if version != 43 {
|
||||
warn!("The provided file has an unsupported version ({})", version);
|
||||
}
|
||||
let (input, _header_version) = le_u32(input)?;
|
||||
let (_input, segment_positions) = count(SegmentPosition::parse, 5)(input)?;
|
||||
Ok((
|
||||
// difference between first segment and parsed bytes of header
|
||||
&input[8 * 5 + 12..segment_positions[0].start],
|
||||
Self { segment_positions },
|
||||
))
|
||||
|
||||
let _header_version = cursor.read_u32::<LE>()?;
|
||||
let mut segment_positions = Vec::new();
|
||||
for _ in 0..5 {
|
||||
let offset = cursor.read_u32::<LE>()?;
|
||||
let length = cursor.read_u32::<LE>()?;
|
||||
segment_positions.push(SegmentPosition {
|
||||
offset: offset as usize,
|
||||
length: length as usize,
|
||||
})
|
||||
}
|
||||
Ok(Header { segment_positions })
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -119,26 +125,30 @@ impl Header {
|
|||
struct Info {
|
||||
entry_count: usize,
|
||||
name: String,
|
||||
entry_name_element_size: usize,
|
||||
}
|
||||
|
||||
impl Info {
|
||||
fn parse(input: &[u8]) -> IResult<&[u8], Self> {
|
||||
let (input, _flags) = le_u32(input)?;
|
||||
let (input, entry_count) = le_u32(input)?;
|
||||
let (input, name) = take_str64(input)?;
|
||||
let (input, _entry_meta_data_element_size) = le_u32(input)?;
|
||||
let (input, _entry_name_element_size) = le_u32(input)?;
|
||||
let (input, _alignment) = le_u32(input)?;
|
||||
let (input, _compact_format) = le_i32(input)?;
|
||||
let (input, _build_time) = le_u32(input)?;
|
||||
fn parse(data: &[u8]) -> Result<Self, Error> {
|
||||
let mut cursor = Cursor::new(data);
|
||||
|
||||
Ok((
|
||||
input,
|
||||
Self {
|
||||
entry_count: entry_count as usize,
|
||||
name,
|
||||
},
|
||||
))
|
||||
let _flags = cursor.read_u32::<LE>()?;
|
||||
let entry_count = cursor.read_u32::<LE>()?;
|
||||
debug!("Number of entries: {}", entry_count);
|
||||
let name = cursor.read_string(64)?;
|
||||
debug!("Name of wave bank: {}", name);
|
||||
let _entry_meta_data_element_size = cursor.read_u32::<LE>()?;
|
||||
let entry_name_element_size = cursor.read_u32::<LE>()?;
|
||||
debug!("Size of entry names: {}", entry_name_element_size);
|
||||
let _alignment = cursor.read_u32::<LE>()?;
|
||||
let _compact_format = cursor.read_u32::<LE>()?;
|
||||
let _build_time = cursor.read_u32::<LE>()?;
|
||||
|
||||
Ok(Self {
|
||||
entry_count: entry_count as usize,
|
||||
name,
|
||||
entry_name_element_size: entry_name_element_size as usize,
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -151,35 +161,32 @@ struct Entry {
|
|||
}
|
||||
|
||||
impl Entry {
|
||||
fn parse(input: &[u8]) -> IResult<&[u8], Self> {
|
||||
let (input, _flags_and_duration) = le_u32(input)?;
|
||||
let (input, format) = le_u32(input)?;
|
||||
let (input, data_offset) = le_u32(input)?;
|
||||
let (input, data_length) = le_u32(input)?;
|
||||
let (input, _loop_start) = le_u32(input)?;
|
||||
let (input, _loop_length) = le_u32(input)?;
|
||||
fn parse(data: &[u8]) -> Result<Self, Error> {
|
||||
let mut cursor = Cursor::new(data);
|
||||
|
||||
Ok((
|
||||
input,
|
||||
Self {
|
||||
name: "".to_string(),
|
||||
format: format.into(),
|
||||
data_offset: data_offset as usize,
|
||||
data_length: data_length as usize,
|
||||
},
|
||||
))
|
||||
let _flags_and_duration = cursor.read_u32::<LE>()?;
|
||||
let format = cursor.read_u32::<LE>()?;
|
||||
let data_offset = cursor.read_u32::<LE>()?;
|
||||
let data_length = cursor.read_u32::<LE>()?;
|
||||
let _loop_start = cursor.read_u32::<LE>()?;
|
||||
let _loop_length = cursor.read_u32::<LE>()?;
|
||||
|
||||
trace!(
|
||||
"Parsed Entry with Format {:?} at offset {} (length {})",
|
||||
Format::from(format),
|
||||
data_offset,
|
||||
data_length
|
||||
);
|
||||
|
||||
Ok(Self {
|
||||
name: "".to_string(),
|
||||
format: format.into(),
|
||||
data_offset: data_offset as usize,
|
||||
data_length: data_length as usize,
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
fn take_str(input: &[u8], len: usize) -> IResult<&[u8], String> {
|
||||
let (input, parsed) = take_str!(input, len)?;
|
||||
Ok((input, parsed.replace("\0", "")))
|
||||
}
|
||||
|
||||
fn take_str64(input: &[u8]) -> IResult<&[u8], String> {
|
||||
take_str(input, 64)
|
||||
}
|
||||
|
||||
#[derive(Debug, Clone)]
|
||||
pub struct WaveBank<'a> {
|
||||
pub name: String,
|
||||
|
|
@ -187,43 +194,56 @@ pub struct WaveBank<'a> {
|
|||
}
|
||||
|
||||
impl WaveBank<'_> {
|
||||
pub fn parse(data: &'_ [u8]) -> Result<WaveBank> {
|
||||
pub fn parse(data: &'_ [u8]) -> Result<WaveBank, Error> {
|
||||
debug!("Parsing header");
|
||||
let header = exec_nom_parser(Header::parse, data)?;
|
||||
let header = Header::parse(mini_parser::get_slice_range(data, 0..52)?)?;
|
||||
|
||||
debug!("Getting segments from file");
|
||||
let segments: Vec<&'_ [u8]> = header
|
||||
.segment_positions
|
||||
.iter()
|
||||
.map(|x| x.get_from(data))
|
||||
.collect();
|
||||
.map(|segment| segment.get_from(data))
|
||||
.collect::<Result<_, _>>()?;
|
||||
|
||||
debug!("Parsing info (length {})", segments[0].len());
|
||||
let info = exec_nom_parser(Info::parse, segments[0])?;
|
||||
let info = Info::parse(segments[0])?;
|
||||
|
||||
debug!("Parsing entries (length {})", segments[1].len());
|
||||
let entries = exec_nom_parser(count(Entry::parse, info.entry_count as usize), segments[1])?;
|
||||
let mut entries: Vec<Entry> = segments[1]
|
||||
.chunks_exact(24)
|
||||
.map(Entry::parse)
|
||||
.collect::<Result<_, _>>()?;
|
||||
|
||||
debug!("Parsing entry names (length {})", segments[3].len());
|
||||
let entry_names = if segments[3].len() == info.entry_count as usize * 64 {
|
||||
exec_nom_parser(count(take_str64, info.entry_count as usize), segments[3])?
|
||||
} else {
|
||||
warn!("Wave bank does not have name entries");
|
||||
(0..info.entry_count).map(|x| x.to_string()).collect()
|
||||
};
|
||||
let entry_names: Vec<String> = segments[3]
|
||||
.chunks_exact(info.entry_name_element_size)
|
||||
.map(String::from_utf8_lossy)
|
||||
.map(|name| name.into_owned())
|
||||
.collect();
|
||||
|
||||
for (i, entry) in entries.iter_mut().enumerate() {
|
||||
entry.name = entry_names
|
||||
.get(i)
|
||||
.map(|name| name.to_string())
|
||||
.unwrap_or_else(|| {
|
||||
warn!("Entry does not have name; naming after index {}", i);
|
||||
i.to_string()
|
||||
});
|
||||
}
|
||||
|
||||
let mut wave_bank = WaveBank {
|
||||
name: info.name,
|
||||
sounds: HashMap::new(),
|
||||
};
|
||||
|
||||
for (entry, name) in entries.iter().zip(entry_names.iter()) {
|
||||
let (start, end) =
|
||||
utils::offset_length_to_start_end(entry.data_offset, entry.data_length);
|
||||
for entry in entries.iter() {
|
||||
let end = entry.data_offset + entry.data_length;
|
||||
wave_bank.sounds.insert(
|
||||
name.replace("\0", "").to_string(),
|
||||
entry.name.replace("\0", "").to_string(),
|
||||
Sound {
|
||||
format: entry.format.clone(),
|
||||
data: &segments[4][start..end],
|
||||
size: end - start,
|
||||
data: mini_parser::get_slice_range(segments[4], entry.data_offset..end)?,
|
||||
size: entry.data_length,
|
||||
},
|
||||
);
|
||||
}
|
||||
|
|
@ -242,10 +262,10 @@ pub struct Sound<'a> {
|
|||
}
|
||||
|
||||
impl Sound<'_> {
|
||||
pub fn to_wav(&self) -> Result<Vec<u8>> {
|
||||
pub fn to_wav(&self) -> Result<Vec<u8>, Error> {
|
||||
match &self.format.tag {
|
||||
FormatTag::ADPCM => Ok(adpcm::build_wav(self.format.clone().try_into()?, self.data)),
|
||||
_ => Err(Error::UnsupportedFormat(self.format.tag.clone()).into()),
|
||||
_ => Err(Error::UnsupportedFormat(self.format.tag.clone())),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Reference in New Issue