Add Music::from_bytes() function (#704)

Author: Flaise

changelog.md

@@ -18,6 +18,11 @@ breaking exisitng code too much.
 * Adds the `unsafe_textures` feature to this crate, allowing to get rid of the lifetimes
 in `Texture`s in the `render` module.
 
+[PR #704](https://github.com/Rust-SDL2/rust-sdl2/pull/704)
+
+* Adds the `Music::from_static_bytes` function, which creates a Music instance with the
+static lifetime from a buffer that also has a static lifetime.
+
 ### v0.30
 
 Re-exported sdl2\_sys as sdl2::sys

src/sdl2/mixer/mod.rs

@@ -1,7 +1,7 @@
 //!
 //! A binding for the library `SDL2_mixer`
 //!
-//! 
+//!
 //! Note that you need to build with the
 //! feature `mixer` for this module to be enabled,
 //! like so:
@@ -27,7 +27,7 @@ use std::ffi::{CString, CStr};
 use std::str::from_utf8;
 use std::borrow::ToOwned;
 use std::path::Path;
-use libc::{c_int, uint16_t, c_double, c_uint};
+use libc::{c_int, uint16_t, c_double, c_uint, c_void};
 use ::get_error;
 use ::rwops::RWops;
 use ::version::Version;
@@ -790,6 +790,28 @@ impl<'a> Music<'a> {
         }
     }
 
+    /// Load music from a static byte buffer.
+    pub fn from_static_bytes(buf: &'static [u8]) -> Result<Music<'static>, String> {
+        let rw = unsafe {
+            ::sys::rwops::SDL_RWFromConstMem(buf.as_ptr() as *const c_void, buf.len() as c_int)
+        };
+
+        if rw.is_null() {
+            return Err(get_error());
+        }
+
+        let raw = unsafe { ffi::Mix_LoadMUS_RW(rw, 0) };
+        if raw.is_null() {
+            Err(get_error())
+        } else {
+            Ok(Music {
+                raw: raw,
+                owned: true,
+                _marker: PhantomData,
+            })
+        }
+    }
+
     /// The file format encoding of the music.
     pub fn get_type(&self) -> MusicType {
         let ret = unsafe { ffi::Mix_GetMusicType(self.raw) as i32 } as c_uint;