temp record audio

.gitignore

@@ -1,3 +1,4 @@
 /target
 /test-roms
 /bootrom
+/wavs

Cargo.lock

@@ -413,6 +413,7 @@ dependencies = [
  "cpal",
  "futures",
  "gilrs",
+ "hound",
  "minifb",
  "rand",
  "ringbuf",
@@ -491,6 +492,12 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "hound"
+version = "3.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4d13cdbd5dbb29f9c88095bbdc2590c9cba0d0a1269b983fef6b2cdd7e9f4db1"
+
 [[package]]
 name = "indexmap"
 version = "1.9.2"

Cargo.toml

@@ -16,3 +16,4 @@ cpal = "0.15.0"
 ringbuf = "0.3.2"
 async-ringbuf = "0.1.2"
 futures = "0.3.26"
+hound = "3.5.0"

src/processor/memory/mmio/apu.rs

@@ -1,3 +1,5 @@
+use std::{fs::File, io::BufWriter, path::Path};
+
 use self::{
     channels::EnvelopeMode,
     types::{Channels, DacSample, Mixer, VinEnable, Volume},
@@ -16,6 +18,7 @@ use cpal::{
     Device, Stream, StreamConfig,
 };
 use futures::executor;
+use hound::WavWriter;
 use samplerate::{ConverterType, Samplerate};
 
 mod channels;
@@ -56,8 +59,11 @@ pub struct Apu {
     stream: Option<Stream>,
     send_rb: Option<AsyncHeapProducer<f32>>,
     converter: Samplerate,
+    writer: Option<WavWriter<BufWriter<File>>>,
 }
 
+const IS_SAVING: bool = true;
+
 impl Default for Apu {
     fn default() -> Self {
         let host = cpal::default_host();
@@ -72,8 +78,34 @@ impl Default for Apu {
         let config = supported_configs_range
             .next()
             .expect("no supported config?!")
-            .with_max_sample_rate()
-            .config();
+            .with_max_sample_rate();
+
+        let base_filename = "wavs/out";
+        let mut filename = format!("{base_filename}.wav");
+        let mut i = 0;
+        while Path::new(filename.as_str()).exists() {
+            i += 1;
+            filename = format!("{base_filename} ({i}).wav");
+        }
+
+        let writer = if IS_SAVING {
+            Some(
+                hound::WavWriter::create(
+                    filename,
+                    hound::WavSpec {
+                        channels: config.channels(),
+                        sample_rate: config.sample_rate().0,
+                        bits_per_sample: (config.sample_format().sample_size() * 8) as u16,
+                        sample_format: hound::SampleFormat::Float,
+                    },
+                )
+                .unwrap(),
+            )
+        } else {
+            None
+        };
+
+        let config = config.config();
 
         let converter = Samplerate::new(
             ConverterType::Linear,
@@ -96,6 +128,7 @@ impl Default for Apu {
             stream: None,
             send_rb: None,
             converter,
+            writer,
         }
     }
 }
@@ -182,6 +215,11 @@ impl Apu {
                 )
                 .unwrap();
             executor::block_on(send.push_slice(&converted)).unwrap();
+            if let Some(ref mut writer) = self.writer {
+                for v in converted {
+                    writer.write_sample(v).unwrap();
+                }
+            }
         }
     }