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
extern crate ao_sys as ao;
extern crate libc;
extern crate mpg123_sys as mpg123;
use libc::{c_int, c_long, uint32_t};
use std::ffi::CString;
use std::path::Path;
use std::ptr;
macro_rules! raise(
($message:expr) => (return Err($message));
);
pub fn play<T: AsRef<Path>>(path: T) -> Result<(), &'static str> {
let path = path.as_ref();
if !path.exists() {
raise!("the file does not exist");
}
let path = match path.to_str() {
Some(path) => match CString::new(path) {
Ok(path) => path,
_ => raise!("the path is malformed"),
},
_ => raise!("the path is malformed"),
};
unsafe {
mpg123::mpg123_init();
let mut error: c_int = 0;
let handle = mpg123::mpg123_new(ptr::null(), &mut error);
if error != mpg123::MPG123_OK as c_int {
raise!("something went wrong");
}
error = mpg123::mpg123_open(handle, path.as_ptr());
if error != mpg123::MPG123_OK as c_int {
mpg123::mpg123_delete(handle);
mpg123::mpg123_exit();
raise!("failed to open the file");
}
let mut rate: c_long = 0;
let mut channels: c_int = 0;
let mut encoding: c_int = 0;
error = mpg123::mpg123_getformat(handle, &mut rate, &mut channels, &mut encoding);
if error != mpg123::MPG123_OK as c_int {
mpg123::mpg123_close(handle);
mpg123::mpg123_delete(handle);
mpg123::mpg123_exit();
raise!("failed to get the format");
}
ao::ao_initialize();
let mut format = ao::ao_sample_format {
bits: 8 * mpg123::mpg123_encsize(encoding),
rate: rate as c_int,
channels: channels,
byte_format: ao::AO_FMT_NATIVE,
matrix: ptr::null_mut(),
};
let driver = ao::ao_default_driver_id();
let device = ao::ao_open_live(driver, &mut format, ptr::null_mut());
let buffer_size = mpg123::mpg123_outblock(handle);
let buffer = libc::malloc(8 * buffer_size) as *mut _;
let mut done = 0;
loop {
error = mpg123::mpg123_read(handle, buffer, buffer_size, &mut done);
if error != mpg123::MPG123_OK as c_int {
break;
}
ao::ao_play(device, buffer as *mut _, done as uint32_t);
}
libc::free(buffer as *mut _);
ao::ao_close(device);
ao::ao_shutdown();
mpg123::mpg123_close(handle);
mpg123::mpg123_delete(handle);
mpg123::mpg123_exit();
}
Ok(())
}
#[cfg(test)]
mod tests {
#[test]
fn play() {
::play("tests/fixtures/sound.mp3").unwrap();
}
}