feat: Add DSF Audio support

- Adds support for DSF Audio
- Bumps patch version

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "infer"
-version = "0.7.0"
+version = "0.7.1"
 authors = ["Bojan <[email protected]>"]
 edition = "2018"
 description = "Small crate to infer file type based on magic number signatures"

src/lib.rs

@@ -65,8 +65,9 @@ assert_eq!(kind.extension(), "foo");
 # }
 ```
 */
+
 #![crate_name = "infer"]
-#![doc(html_root_url = "https://docs.rs/infer/0.3.0")]
+#![doc(html_root_url = "https://docs.rs/infer/latest")]
 #![forbid(unsafe_code)]
 #![cfg_attr(not(feature = "std"), no_std)]
 

src/map.rs

@@ -301,6 +301,12 @@ matcher_map!(
         "aiff",
         matchers::audio::is_aiff
     ),
+    (
+        MatcherType::Audio,
+        "audio/x-dsf",
+        "dsf",
+        matchers::audio::is_dsf
+    ),
     // Font
     (
         MatcherType::Font,

src/matchers/audio.rs

@@ -75,3 +75,9 @@ pub fn is_aiff(buf: &[u8]) -> bool {
         && buf[10] == 0x46
         && buf[11] == 0x46
 }
+
+/// Returns whether a buffer is DSF data.
+pub fn is_dsf(buf: &[u8]) -> bool {
+    // ref: https://dsd-guide.com/sites/default/files/white-papers/DSFFileFormatSpec_E.pdf
+    buf.len() > 4 && buf[0] == b'D' && buf[1] == b'S' && buf[2] == b'D' && buf[3] == b' '
+}

tests/audio.rs

@@ -1,3 +1,4 @@
 mod common;
 
 test_format!(Audio, "audio/mpeg", "mp3", mp3, "sample.mp3");
+test_format!(Audio, "audio/x-dsf", "dsf", dsf, "sample.dsf");