Update CONTRIBUTING.md

Parsing was failing for malformed wav files
where the final chunk was not padded to a
word boundary.

CONTRIBUTING.md

@@ -0,0 +1,64 @@
+# Contributing
+
+Contributions to `bwavfile` are welcome!
+
+This project is currently in a maintenance phase, new features are entertained if we
+believe there is some demand for them but for the most part our current priorities 
+are:
+
+* Addressing bugs.
+* Keeping the codebase modern as the Rust language evolves.
+
+This being said, there are some features that we've been wanting for some time and 
+new contributors are welcome to take a swing at these:
+
+* Reading `levl` metadata for the generation of waveform overviews.
+* Reading `smpl` metadata for reading sampler data, note assignments, loops etc.
+
+## Adding New Features
+
+If you are adding a large amount of new functionality, please weigh the amount of 
+work you're doing against the potential benefit, the burden on the maintainers to
+review the work, and the technical debt incurred.
+
+In general,
+
+* new features should address new technologies; do not expend large amounts of
+  effort to implement features that are primarily of historical interest.
+* new features should address the needs of professional users in a music or media
+  production environment.
+
+Features that implement new reading functionality must, when submitted, include 
+test WAV files created empirically by third-party software. 
+
+## Regarding use of Agents
+
+`bwavfile` is an open-source project that is offered free for no commerical gain, and 
+is developed and maintained for educational and creative reasons.
+
+If you use an agent or LLM to produce code for it you are missing out on the benefits 
+of contributing to an open-source project, particularly community, collaboration with 
+other developers and designers, and being able to learn and experiment without the 
+burden of deadlines or worrying about business cases or profits.
+
+This project is supposed to be fun, do not let machines have fun for you.
+
+We can't prevent you from using LLMs to contribute to this project but we ask you 
+abide by the following eitiquette when doing so:
+
+* All communication with the maintainers must be written by a human in their own
+  voice. Never use an LLM to craft thread comments, discussion posts, issues, emails
+  or other correspondence with other developers or the maintainers. 
+* PRs must be submitted by a person. Do not allow an agent to submit its own PRs to
+  this project.
+* Especially if you are a new contributor to this project, please submit only one PR
+  at a time and please restrict the subject matter of the PR to a specific unit,
+  module or tool. All submissions have to be reviewed and understood by the
+  maintainers before they can be merged.
+
+Obviously we can't verify if you follow all of these rules but certain telltale 
+traits of LLM-predicted text or code will raise a flag: lack of brevity in 
+descriptions or code comments, large amounts of text describing your process or 
+steps that add little to understanding the changes you've made, use of an 
+obsequious tone or being excessively accomodating, immediately doing requests 
+without further discussion or clarifications.

Cargo.lock

@@ -1,21 +1,6 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
-version = 3
-
-[[package]]
-name = "android-tzdata"
-version = "0.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e999941b234f3131b00bc13c22d06e8c5ff726d1b6318ac7eb276997bbb4fef0"
-
-[[package]]
-name = "android_system_properties"
-version = "0.1.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "819e7219dbd41043ac279b19830f2efc897156490d7fd6ea916720117ee66311"
-dependencies = [
- "libc",
-]
+version = 4
 
 [[package]]
 name = "ansi_term"
@@ -37,30 +22,17 @@ dependencies = [
  "winapi",
 ]
 
-[[package]]
-name = "autocfg"
-version = "1.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
-
 [[package]]
 name = "bitflags"
 version = "1.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
 
-[[package]]
-name = "bumpalo"
-version = "3.13.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a3e2c3daef883ecc1b5d58c15adae93470a91d425f3532ba1695849656af3fc1"
-
 [[package]]
 name = "bwavfile"
-version = "2.1.0"
+version = "2.0.2"
 dependencies = [
  "byteorder",
- "chrono",
  "clap",
  "dasp_sample",
  "encoding",
@@ -74,33 +46,6 @@ version = "1.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "14c189c53d098945499cdfa7ecc63567cf3886b3332b312a5b4585d8d3a6a610"
 
-[[package]]
-name = "cc"
-version = "1.0.79"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "50d30906286121d95be3d479533b458f87493b30a4b5f79a607db8f5d11aa91f"
-
-[[package]]
-name = "cfg-if"
-version = "1.0.0"
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-checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
-
-[[package]]
-name = "chrono"
-version = "0.4.26"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ec837a71355b28f6556dbd569b37b3f363091c0bd4b2e735674521b4c5fd9bc5"
-dependencies = [
- "android-tzdata",
- "iana-time-zone",
- "js-sys",
- "num-traits",
- "time",
- "wasm-bindgen",
- "winapi",
-]
-
 [[package]]
 name = "clap"
 version = "2.33.3"
@@ -116,12 +61,6 @@ dependencies = [
  "vec_map",
 ]
 
-[[package]]
-name = "core-foundation-sys"
-version = "0.8.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e496a50fda8aacccc86d7529e2c1e0892dbd0f898a6b5645b5561b89c3210efa"
-
 [[package]]
 name = "dasp_sample"
 version = "0.11.0"
@@ -201,88 +140,17 @@ dependencies = [
  "libc",
 ]
 
-[[package]]
-name = "iana-time-zone"
-version = "0.1.56"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0722cd7114b7de04316e7ea5456a0bbb20e4adb46fd27a3697adb812cff0f37c"
-dependencies = [
- "android_system_properties",
- "core-foundation-sys",
- "iana-time-zone-haiku",
- "js-sys",
- "wasm-bindgen",
- "windows",
-]
-
-[[package]]
-name = "iana-time-zone-haiku"
-version = "0.1.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f31827a206f56af32e590ba56d5d2d085f558508192593743f16b2306495269f"
-dependencies = [
- "cc",
-]
-
 [[package]]
 name = "itoa"
 version = "0.4.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b71991ff56294aa922b450139ee08b3bfc70982c6b2c7562771375cf73542dd4"
 
-[[package]]
-name = "js-sys"
-version = "0.3.63"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2f37a4a5928311ac501dee68b3c7613a1037d0edb30c8e5427bd832d55d1b790"
-dependencies = [
- "wasm-bindgen",
-]
-
 [[package]]
 name = "libc"
-version = "0.2.144"
+version = "0.2.103"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2b00cc1c228a6782d0f076e7b232802e0c5689d41bb5df366f2a6b6621cfdfe1"
-
-[[package]]
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-
-[[package]]
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- "autocfg",
-]
-
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-
-[[package]]
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-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6aeca18b86b413c660b781aa319e4e2648a3e6f9eadc9b47e9038e6fe9f3451b"
-dependencies = [
- "unicode-ident",
-]
-
-[[package]]
-name = "quote"
-version = "1.0.28"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1b9ab9c7eadfd8df19006f1cf1a4aed13540ed5cbc047010ece5826e10825488"
-dependencies = [
- "proc-macro2",
-]
+checksum = "dd8f7255a17a627354f321ef0055d63b898c6fb27eff628af4d1b66b7331edf6"
 
 [[package]]
 name = "ryu"
@@ -313,17 +181,6 @@ version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8ea5119cdb4c55b55d432abb513a0429384878c15dde60cc77b1c99de1a95a6a"
 
-[[package]]
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-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "32d41677bcbe24c20c52e7c70b0d8db04134c5d1066bf98662e2871ad200ea3e"
-dependencies = [
- "proc-macro2",
- "quote",
- "unicode-ident",
-]
-
 [[package]]
 name = "textwrap"
 version = "0.11.0"
@@ -333,23 +190,6 @@ dependencies = [
  "unicode-width",
 ]
 
-[[package]]
-name = "time"
-version = "0.1.45"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1b797afad3f312d1c66a56d11d0316f916356d11bd158fbc6ca6389ff6bf805a"
-dependencies = [
- "libc",
- "wasi",
- "winapi",
-]
-
-[[package]]
-name = "unicode-ident"
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-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b15811caf2415fb889178633e7724bad2509101cde276048e013b9def5e51fa0"
-
 [[package]]
 name = "unicode-width"
 version = "0.1.9"
@@ -368,66 +208,6 @@ version = "0.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f1bddf1187be692e79c5ffeab891132dfb0f236ed36a43c7ed39f1165ee20191"
 
-[[package]]
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-
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-dependencies = [
- "cfg-if",
- "wasm-bindgen-macro",
-]
-
-[[package]]
-name = "wasm-bindgen-backend"
-version = "0.2.86"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "19b04bc93f9d6bdee709f6bd2118f57dd6679cf1176a1af464fca3ab0d66d8fb"
-dependencies = [
- "bumpalo",
- "log",
- "once_cell",
- "proc-macro2",
- "quote",
- "syn",
- "wasm-bindgen-shared",
-]
-
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-dependencies = [
- "quote",
- "wasm-bindgen-macro-support",
-]
-
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-checksum = "e128beba882dd1eb6200e1dc92ae6c5dbaa4311aa7bb211ca035779e5efc39f8"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
- "wasm-bindgen-backend",
- "wasm-bindgen-shared",
-]
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-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ed9d5b4305409d1fc9482fee2d7f9bcbf24b3972bf59817ef757e23982242a93"
-
 [[package]]
 name = "winapi"
 version = "0.3.9"
@@ -449,69 +229,3 @@ name = "winapi-x86_64-pc-windows-gnu"
 version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
-
-[[package]]
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-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e686886bc078bc1b0b600cac0147aadb815089b6e4da64016cbd754b6342700f"
-dependencies = [
- "windows-targets",
-]
-
-[[package]]
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-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7b1eb6f0cd7c80c79759c929114ef071b87354ce476d9d94271031c0497adfd5"
-dependencies = [
- "windows_aarch64_gnullvm",
- "windows_aarch64_msvc",
- "windows_i686_gnu",
- "windows_i686_msvc",
- "windows_x86_64_gnu",
- "windows_x86_64_gnullvm",
- "windows_x86_64_msvc",
-]
-
-[[package]]
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-
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-version = "0.48.0"
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-checksum = "ca2b8a661f7628cbd23440e50b05d705db3686f894fc9580820623656af974b1"
-
-[[package]]
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-version = "0.48.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7896dbc1f41e08872e9d5e8f8baa8fdd2677f29468c4e156210174edc7f7b953"
-
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Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "bwavfile"
-version = "2.1.0"
+version = "2.0.2"
 authors = ["Jamie Hardt <jamiehardt@me.com>", "Ian Hobson <ian.r.hobson@gmail.com>"]
 edition = "2018"
 license = "MIT"
@@ -19,7 +19,6 @@ dasp_sample = "0.11.0"
 encoding = "0.2.33"
 uuid = "0.8.1"
 clap = "2.33.3"
-chrono = "0.4.26"
 
 [dev-dependencies]
 serde_json = "1.0.61"

src/bext.rs

@@ -1,10 +1,8 @@
-#[allow(clippy::upper_case_acronyms)]
 pub type LU = f32;
+#[allow(clippy::upper_case_acronyms)]
 pub type LUFS = f32;
 pub type Decibels = f32;
 
-use chrono::{Local, DateTime};
-
 ///  Broadcast-WAV metadata record.
 ///
 ///  The `bext` record contains information about the original recording of the
@@ -81,43 +79,3 @@ pub struct Bext {
     /// Coding History.
     pub coding_history: String,
 }
-
-impl Default for Bext {
-    /// Create a new version 0 `bext` with all description fields set to the empty string 
-    /// and the current local date and time filled in.
-    fn default() -> Self {
-        let now: DateTime<_> = Local::now();
-
-        Self {
-            description: "".to_string(),
-            originator: "".to_string(),
-            originator_reference: "".to_string(),
-            origination_date: now.date_naive().format("%Y-%m%-d").to_string(),
-            origination_time: now.time().format("%H:%M:%S").to_string(),
-            time_reference: 0,
-            version: 0,
-            umid: None,
-            loudness_value: None,
-            loudness_range: None,
-            max_true_peak_level: None,
-            max_momentary_loudness: None,
-            max_short_term_loudness: None,
-            coding_history: "".to_string(),
-        }
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn build_default() {
-        let d = Bext::default();
-        assert_eq!(d.description, "");
-        assert_eq!(d.originator, "");
-        assert_eq!(d.originator_reference, "");
-        assert_eq!(d.version, 0);
-        assert_eq!(d.time_reference, 0);
-    }
-}

src/chunks.rs

@@ -37,7 +37,7 @@ where
         self.write_u16::<LittleEndian>(format.block_alignment)?;
         self.write_u16::<LittleEndian>(format.bits_per_sample)?;
         if let Some(ext) = format.extended_format {
-            let cb_size = 24u16;
+            let cb_size = 22u16;
             self.write_u16::<LittleEndian>(cb_size)?;
             self.write_u16::<LittleEndian>(ext.valid_bits_per_sample)?;
             self.write_u32::<LittleEndian>(ext.channel_mask)?;

src/common_format.rs

@@ -1,5 +1,4 @@
 /// Format tags, UUIDs and utilities
-
 use uuid::Uuid;
 
 /// Format tag for integer LPCM
@@ -90,7 +89,9 @@ impl CommonFormat {
             (WAVE_TAG_EXTENDED, Some(WAVE_UUID_PCM)) => Self::IntegerPCM,
             (WAVE_TAG_EXTENDED, Some(WAVE_UUID_FLOAT)) => Self::IeeeFloatPCM,
             (WAVE_TAG_EXTENDED, Some(WAVE_UUID_BFORMAT_PCM)) => Self::AmbisonicBFormatIntegerPCM,
-            (WAVE_TAG_EXTENDED, Some(WAVE_UUID_BFORMAT_FLOAT)) => Self::AmbisonicBFormatIeeeFloatPCM,
+            (WAVE_TAG_EXTENDED, Some(WAVE_UUID_BFORMAT_FLOAT)) => {
+                Self::AmbisonicBFormatIeeeFloatPCM
+            }
             (WAVE_TAG_EXTENDED, Some(x)) => CommonFormat::UnknownExtended(x),
             (x, _) => CommonFormat::UnknownBasic(x),
         }

src/fmt.rs

@@ -1,3 +1,5 @@
+#![allow(dead_code)]
+
 use crate::common_format::{CommonFormat, WAVE_UUID_BFORMAT_PCM, WAVE_UUID_PCM};
 use crate::Sample;
 
@@ -8,7 +10,6 @@ use byteorder::LittleEndian;
 use byteorder::ReadBytesExt;
 
 // Need more test cases for ADMAudioID
-#[allow(dead_code)]
 
 /// ADM Audio ID record.
 ///
@@ -154,7 +155,7 @@ pub struct WaveFmtExtended {
 /// - [Sampler Metadata](http://www.piclist.com/techref/io/serial/midi/wave.html)
 /// - [Audio File Format Specifications](http://www-mmsp.ece.mcgill.ca/Documents/AudioFormats/WAVE/WAVE.html) (September 2022) Prof. Peter Kabal, MMSP Lab, ECE, McGill University
 /// - [Multimedia Programming Interface and Data Specifications 1.0](http://www-mmsp.ece.mcgill.ca/Documents/AudioFormats/WAVE/Docs/riffmci.pdf)
-///    (August 1991), IBM Corporation and Microsoft Corporation
+///   (August 1991), IBM Corporation and Microsoft Corporation
 ///
 /// [rfc3261]: https://tools.ietf.org/html/rfc2361
 
@@ -394,7 +395,7 @@ pub trait ReadWavAudioData {
 
 impl<T> ReadWavAudioData for T
 where
-    T: std::io::Read
+    T: std::io::Read,
 {
     /// # Panics:
     /// * If the format's [valid bits per sample](WaveFmt::valid_bits_per_sample) is
@@ -404,7 +405,7 @@ where
         format: WaveFmt,
         into: &mut [i32],
     ) -> Result<usize, std::io::Error> {
-        assert!(into.len() % format.channel_count as usize == 0);
+        assert!(into.len().is_multiple_of(format.channel_count as usize));
 
         for frame in into {
             *frame = match (format.valid_bits_per_sample(), format.bits_per_sample) {
@@ -424,7 +425,7 @@ where
         format: WaveFmt,
         into: &mut [f32],
     ) -> Result<usize, std::io::Error> {
-        assert!(into.len() % format.channel_count as usize == 0);
+        assert!(into.len().is_multiple_of(format.channel_count as usize));
         todo!()
     }
 }

src/lib.rs

@@ -50,7 +50,9 @@ pub use common_format::{
 };
 pub use cue::Cue;
 pub use errors::Error;
-pub use fmt::{ADMAudioID, ChannelDescriptor, ChannelMask, WaveFmt, WaveFmtExtended, ReadWavAudioData};
+pub use fmt::{
+    ADMAudioID, ChannelDescriptor, ChannelMask, ReadWavAudioData, WaveFmt, WaveFmtExtended,
+};
 pub use sample::{Sample, I24};
 pub use wavereader::{AudioFrameReader, WaveReader};
 pub use wavewriter::{AudioFrameWriter, WaveWriter};

src/parser.rs

@@ -18,6 +18,7 @@ use super::fourcc::{BW64_SIG, DATA_SIG, DS64_SIG, RF64_SIG, RIFF_SIG, WAVE_SIG};
 const RF64_SIZE_MARKER: u32 = 0xFF_FF_FF_FF;
 
 #[derive(Debug)]
+#[allow(dead_code)]
 pub enum Event {
     StartParse,
     ReadHeader {
@@ -258,7 +259,7 @@ impl<R: Read + Seek> Parser<R> {
 
             state = State::ReadyForChunk {
                 at: at + 8 + this_displacement,
-                remaining: remaining - 8 - this_displacement,
+                remaining: remaining.saturating_sub(8 + this_displacement),
             }
         }
 
@@ -292,3 +293,35 @@ impl<R: Read + Seek> Parser<R> {
         }
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use std::io::Cursor;
+
+    #[test]
+    fn parser_handles_missing_trailing_pad_on_final_odd_chunk() {
+        let mut buf = Vec::new();
+        buf.extend_from_slice(b"RIFF");
+        buf.extend_from_slice(&39u32.to_le_bytes());
+        buf.extend_from_slice(b"WAVE");
+        buf.extend_from_slice(b"fmt ");
+        buf.extend_from_slice(&16u32.to_le_bytes());
+        buf.extend_from_slice(&[0u8; 16]);
+        buf.extend_from_slice(b"data");
+        buf.extend_from_slice(&3u32.to_le_bytes());
+        buf.extend_from_slice(&[0xAA, 0xBB, 0xCC]);
+        assert_eq!(buf.len(), 47);
+
+        let chunks = Parser::make(Cursor::new(&buf))
+            .unwrap()
+            .into_chunk_list()
+            .expect("parser should accept a missing trailing pad on the final odd-length chunk");
+
+        assert_eq!(chunks.len(), 2);
+        assert_eq!(chunks[0].signature, FourCC::from(*b"fmt "));
+        assert_eq!(chunks[0].length, 16);
+        assert_eq!(chunks[1].signature, DATA_SIG);
+        assert_eq!(chunks[1].length, 3);
+    }
+}

src/wavereader.rs

@@ -110,7 +110,7 @@ impl<R: Read + Seek> AudioFrameReader<R> {
         let common_format = self.format.common_format();
         let bits_per_sample = self.format.bits_per_sample;
 
-        if buffer.len() % channel_count != 0 {
+        if !buffer.len().is_multiple_of(channel_count) {
             return Err(Error::InvalidBufferSize {
                 buffer_size: buffer.len(),
                 channel_count: self.format.channel_count,
@@ -245,7 +245,7 @@ impl<R: Read + Seek> WaveReader<R> {
     /// will return an `Err(errors::Error)` immediately if there is a structural
     /// inconsistency that makes the stream unreadable or if it's missing
     /// essential components that make interpreting the audio data impossible.
-
+    ///
     /// ```rust
     /// use std::fs::File;
     /// use std::io::{Error,ErrorKind};

src/wavewriter.rs

@@ -51,7 +51,7 @@ where
         let format = &self.inner.inner.format;
         let channel_count = format.channel_count as usize;
 
-        if buffer.len() % channel_count != 0 {
+        if !buffer.len().is_multiple_of(channel_count) {
             return Err(Error::InvalidBufferSize {
                 buffer_size: buffer.len(),
                 channel_count: format.channel_count,
@@ -339,7 +339,7 @@ where
         assert!(data.len() < u32::MAX as usize);
         self.inner.write_u32::<LittleEndian>(data.len() as u32)?;
         self.inner.write_all(data)?;
-        if data.len() % 2 == 0 {
+        if data.len().is_multiple_of(2) {
             self.increment_form_length(8 + data.len() as u64)?;
         } else {
             self.inner.write_u8(0)?;