@import url("/assets/md.css")feat: working music

@import url("/assets/md.css")

1 files changed, 37 insertions, 0 deletions

diff --git a/src/music.rs b/src/music.rs
new file mode 100644
index 0000000..d44eabf
--- /dev/null
+++ b/src/music.rs
@@ -0,0 +1,37 @@
+use sdl2::audio::AudioCallback;
+
+use crate::vendored::micromod::MmC2r;
+
+pub struct Music {
+  pub pcm: Vec<i16>,
+  pub offset: usize,
+}
+
+impl AudioCallback for Music {
+  type Channel = f32;
+
+  fn callback(&mut self, out_f: &mut [f32]) {
+    let len = out_f.len();
+    pcm_to_f32pcm(&self.pcm[self.offset..(self.offset + len)], out_f, len);
+    self.offset += len;
+  }
+}
+
+pub fn mmc2r_to_pcm(state: &mut MmC2r) -> Vec<i16> {
+  let mut destination = Vec::<i16>::new();
+  loop {
+    let mut out = [0; 4096];
+    if !state.get_audio(&mut out, 2048) {
+      break;
+    }
+    for sample in out {
+      destination.push(sample);
+    }
+  }
+  destination
+}
+pub fn pcm_to_f32pcm(input: &[i16], output: &mut [f32], len: usize) {
+  for i in 0..len {
+    output[i] = f32::from(input[i]) / f32::from(0x7FFF as i16);
+  }
+}