fmod-audio-sys 2.220.2

ffi bindings to FMOD and FMOD Studio
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136

use std::path::PathBuf;

#[cfg(windows)]
fn find_fmod_directory() -> PathBuf {
    for drive in ["C", "D"] {
        let test_path = PathBuf::from(format!(
            "{drive}:/Program Files (x86)/FMOD SoundSystem/FMOD Studio API Windows"
        ));
        if test_path.exists() {
            return test_path;
        }
    }

    let out_dir = PathBuf::from(std::env::var_os("OUT_DIR").unwrap());
    for path in [
        out_dir.join("FMOD Studio API Windows"),
        out_dir.join("FMOD SoundSystem"),
    ] {
        if path.exists() {
            return path;
        }
    }

    std::env::var_os("FMOD_SYS_FMOD_DIRECTORY")
        .map(PathBuf::from)
        .unwrap_or_else(|| PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("fmod"))
}

#[cfg(not(windows))]
fn find_fmod_directory() -> PathBuf {
    let out_dir = PathBuf::from(std::env::var_os("OUT_DIR").unwrap());
    let out_path = out_dir.join("fmod");
    if out_path.exists() {
        return out_path;
    }

    std::env::var_os("FMOD_SYS_FMOD_DIRECTORY")
        .map(PathBuf::from)
        .unwrap_or_else(|| PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("fmod"))
}

fn main() {
    // skip generating bindings in docs.rs, as we use the packaged "documentation.rs" instead
    if std::env::var("DOCS_RS").is_ok() {
        return;
    }
    #[cfg(feature = "force-docs-bindings")]
    return;

    let fmod_dir = find_fmod_directory();
    let api_dir = fmod_dir.join("api");

    assert!(fmod_dir.exists(), "fmod directory not present");
    assert!(api_dir.exists(), "fmod api dir does not exist");

    let api_dir_display = api_dir.display();
    println!("cargo:rerun-if-changed=\"{api_dir_display}/core/inc\"");
    println!("cargo:rerun-if-changed=\"{api_dir_display}/studio/inc\"");

    let bindgen = bindgen::builder()
        .parse_callbacks(Box::new(bindgen::CargoCallbacks::new()))
        .clang_arg(format!("-I{api_dir_display}/core/inc"))
        .clang_arg(format!("-I{api_dir_display}/studio/inc"))
        .newtype_enum("FMOD_RESULT")
        .must_use_type("FMOD_RESULT")
        .new_type_alias("FMOD_BOOL")
        .derive_partialeq(true)
        .derive_eq(true)
        .impl_partialeq(true)
        .derive_hash(true)
        .derive_default(true)
        .prepend_enum_name(false) // fmod already does this
        .header("src/wrapper.h");

    #[cfg(target_arch = "x86")]
    let target_arch = "x86";
    #[cfg(all(target_arch = "x86_64", not(windows)))]
    let target_arch = "x86_64";
    #[cfg(all(target_arch = "x86_64", windows))]
    let target_arch = "x64";

    let include_debug = cfg!(any(debug_assertions, feature = "force-debug"));
    let debug_char = if include_debug { "L" } else { "" };

    println!("cargo:rustc-link-search={api_dir_display}/core/lib/{target_arch}");
    println!("cargo:rustc-link-search={api_dir_display}/studio/lib/{target_arch}");

    #[cfg(target_os = "linux")]
    {
        println!("cargo:rustc-link-lib=fmod{debug_char}");
        println!("cargo:rustc-link-lib=fmodstudio{debug_char}");
    }
    #[cfg(target_os = "windows")]
    {
        println!("cargo:rustc-link-lib=fmod{debug_char}_vc");
        println!("cargo:rustc-link-lib=fmodstudio{debug_char}_vc");
    }

    let bindings = bindgen.generate().expect("failed to generate bindings");
    let out_path = PathBuf::from(std::env::var_os("OUT_DIR").unwrap()).join("bindings.rs");

    bindings
        .write_to_file(out_path)
        .expect("failed to write bindings");

    let docs_path = PathBuf::from(std::env::var_os("CARGO_MANIFEST_DIR").unwrap())
        .join("docs/documentation.rs");

    bindings
        .write_to_file(docs_path)
        .expect("failed to write bindings");

    println!("cargo:rerun-if-changed=\"src/channel_control.cpp\"");
    println!("cargo:rerun-if-changed=\"src/channel_control.h\"");

    // wrapper does not use the stdlib
    let mut build = cc::Build::new();

    build
        .cpp(true)
        .cpp_link_stdlib(None)
        .cpp_set_stdlib(None)
        .include(format!("{api_dir_display}/core/inc"))
        .file("src/channel_control.cpp");
    #[cfg(target_os = "windows")]
    {
        #[cfg(target_arch = "x86_64")]
        let target = "x86_64-pc-windows-msvc";
        #[cfg(target_arch = "x86")]
        let target = "i686-pc-windows-msvc";
        let tool = cc::windows_registry::find_tool(target, "cl.exe").expect("failed to find cl");
        build.compiler(tool.path());
    }

    build.compile("channel_control_wrapper");
}