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pub mod ffi {
use std::os::raw::c_int;
use std::os::raw::c_void;
#[repr(C)]
pub struct SAudioDesc {
sample_rate: c_int,
num_channels: c_int,
buffer_frames: c_int,
packet_frames: c_int,
num_packets: c_int,
stream_cb: Option<unsafe extern fn(*mut f32, c_int, c_int)>,
}
impl SAudioDesc {
pub fn make(desc: &super::SAudioDesc) -> SAudioDesc {
SAudioDesc {
sample_rate: desc.sample_rate,
num_channels: desc.num_channels,
buffer_frames: desc.buffer_frames,
packet_frames: desc.packet_frames,
num_packets: desc.num_packets,
stream_cb: if desc.use_stream_cb { Some(stream_cb) } else { None },
}
}
}
extern {
pub fn saudio_setup(desc: *const SAudioDesc);
pub fn saudio_shutdown();
pub fn saudio_isvalid() -> bool;
pub fn saudio_sample_rate() -> c_int;
pub fn saudio_channels() -> c_int;
pub fn saudio_expect() -> c_int;
pub fn saudio_push(frames: *const f32, num_frames: c_int) -> c_int;
pub fn saudio_set_user_ptr(ptr: *mut c_void);
pub fn saudio_get_user_ptr() -> *mut c_void;
fn stream_cb(buffer: *mut f32, num_frames: c_int, num_channels: c_int);
}
}
#[derive(Default)]
pub struct SAudioDesc {
pub sample_rate: i32,
pub num_channels: i32,
pub buffer_frames: i32,
pub packet_frames: i32,
pub num_packets: i32,
pub use_stream_cb: bool,
}
pub fn saudio_setup(desc: &SAudioDesc) {
unsafe {
ffi::saudio_setup(&ffi::SAudioDesc::make(desc));
}
}
pub fn saudio_shutdown() {
unsafe {
ffi::saudio_shutdown();
}
}
pub fn saudio_isvalid() -> bool {
unsafe {
ffi::saudio_isvalid()
}
}
pub fn saudio_sample_rate() -> i32 {
unsafe {
ffi::saudio_sample_rate()
}
}
pub fn saudio_channels() -> i32 {
unsafe {
ffi::saudio_channels()
}
}
pub fn saudio_expect() -> i32 {
unsafe {
ffi::saudio_expect()
}
}
pub fn saudio_push(frames: &[f32], num_frames: i32) -> i32 {
unsafe {
ffi::saudio_push(frames.as_ptr(), num_frames)
}
}