From 4e091086d6eb934f66cc8e4610f899e1806c1bac Mon Sep 17 00:00:00 2001
From: Yuval Adam <_@yuv.al>
Date: Tue, 24 Jun 2025 09:59:01 +0200
Subject: Initial version

---
 src/main.rs | 72 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 72 insertions(+)
 create mode 100644 src/main.rs

(limited to 'src/main.rs')

diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..d288331
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,72 @@
+use anyhow::{bail, Result};
+use clap::Parser;
+use hound::{SampleFormat, WavReader};
+use std::path::PathBuf;
+
+mod decoder;
+use decoder::MorseDecoder;
+
+const TARGET_SAMPLE_RATE: u32 = 12000; // Same as ggmorse's kBaseSampleRate
+const CHUNK_SIZE: usize = 4096;
+
+#[derive(Parser)]
+#[command(author, version, about, long_about = None)]
+struct Cli {
+    /// Path to the input WAV file
+    #[arg(value_name = "WAV_FILE")]
+    wav_file: PathBuf,
+}
+
+fn main() -> Result<()> {
+    // Set up logging. Use `RUST_LOG=info` or `RUST_LOG=debug` to see output.
+    env_logger::init();
+    let cli = Cli::parse();
+
+    log::info!("Opening WAV file: {:?}", cli.wav_file);
+    let mut reader = WavReader::open(cli.wav_file)?;
+    let spec = reader.spec();
+    log::info!("WAV spec: {:?}", spec);
+
+    if spec.sample_format != SampleFormat::Int && spec.sample_format != SampleFormat::Float {
+        bail!(
+            "Unsupported sample format: {:?}. Only 16-bit Int and 32-bit Float are supported.",
+            spec.sample_format
+        );
+    }
+
+    // --- Create the Morse Decoder ---
+    let mut decoder = MorseDecoder::new(spec.sample_rate, TARGET_SAMPLE_RATE)?;
+
+    // --- Read and process the audio in chunks ---
+    let samples_f32: Vec<f32> = if spec.sample_format == SampleFormat::Int {
+        reader
+            .samples::<i16>()
+            .map(|s| s.unwrap() as f32 / 32768.0)
+            .collect()
+    } else {
+        reader.samples::<f32>().map(|s| s.unwrap()).collect()
+    };
+
+    // Convert to mono by averaging channels if necessary
+    let mono_samples: Vec<f32> = if spec.channels > 1 {
+        samples_f32
+            .chunks_exact(spec.channels as usize)
+            .map(|chunk| chunk.iter().sum::<f32>() / spec.channels as f32)
+            .collect()
+    } else {
+        samples_f32
+    };
+
+    // Process the entire audio buffer
+    for chunk in mono_samples.chunks(CHUNK_SIZE) {
+        decoder.process(chunk)?;
+    }
+    
+    // Finalize decoding after all audio is processed
+    let decoded_text = decoder.finalize()?;
+
+    println!("\n--- Decoded Text ---");
+    println!("{}", decoded_text);
+
+    Ok(())
+}
\ No newline at end of file
-- 
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