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cleaning; signal/snr/ber/unc

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This commit is contained in:
Andrey Dyldin 2018-10-26 01:56:16 +05:00
parent 78affa7895
commit e6f2a2ea1f
1 changed files with 59 additions and 39 deletions
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98
src/frontend.rs
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@ -5,10 +5,25 @@ use libc;
use std::{io, mem};
use std::os::unix::io::RawFd;
pub const FE_GET_INFO: libc::c_ulong = 2158522173; /* _IOR('o', 61, struct dvb_frontend_info) */
pub const FE_READ_STATUS: libc::c_ulong = 2147774277; /* _IOR('o', 69, fe_status_t) */
pub const FE_GET_EVENT: libc::c_ulong = 2150133582; /* _IOR('o', 78, struct dvb_frontend_event) */
pub const FE_SET_PROPERTY: libc::c_ulong = 1074818898; /* _IOW('o', 82, struct dtv_properties) */
pub const FE_GET_INFO: libc::c_ulong = 2158522173;
pub const FE_READ_STATUS: libc::c_ulong = 2147774277;
pub const FE_READ_BER: libc::c_ulong = 2147774278;
pub const FE_READ_SIGNAL_STRENGTH: libc::c_ulong = 2147643207;
pub const FE_READ_SNR: libc::c_ulong = 2147643208;
pub const FE_READ_UNCORRECTED_BLOCKS: libc::c_ulong = 2147774281;
pub const FE_GET_EVENT: libc::c_ulong = 2150133582;
pub const FE_SET_PROPERTY: libc::c_ulong = 1074818898;
#[inline]
pub fn cvt(result: i32) -> io::Result<()> {
if result == -1 {
Err(io::Error::last_os_error())
} else {
Ok(())
}
}
bitflags! {
/// Frontend capabilities
@ -114,15 +129,9 @@ impl Default for Info {
impl Info {
/// Reads frontend information
pub fn read(&mut self, fd: RawFd) -> io::Result<()> {
let x = unsafe {
libc::ioctl(fd, FE_GET_INFO, self as *mut Info as *mut libc::c_void)
};
if x == -1 {
Err(io::Error::last_os_error())
} else {
Ok(())
}
cvt(unsafe {
libc::ioctl(fd, FE_GET_INFO, self as *mut Info)
})
}
}
@ -161,18 +170,39 @@ bitflags! {
impl Status {
/// Reads frontend status
pub fn read(&mut self, fd: RawFd) -> io::Result<()> {
let mut value: u32 = 0;
let x = unsafe {
libc::ioctl(fd, FE_READ_STATUS, &mut value as *mut u32 as *mut libc::c_void)
};
if x == -1 {
self.bits = 0;
Err(io::Error::last_os_error())
} else {
self.bits = value;
Ok(())
cvt(unsafe {
libc::ioctl(fd, FE_READ_STATUS, &mut self.bits as *mut u32)
})
}
fn rv(&self, fd: RawFd, request: libc::c_ulong) -> io::Result<usize> {
if ! self.contains(Status::FE_HAS_LOCK) {
return Ok(0);
}
let mut value: u32 = 0;
cvt(unsafe {
libc::ioctl(fd, request, &mut value as *mut u32)
})?;
Ok(value as usize)
}
pub fn signal(&self, fd: RawFd) -> io::Result<usize> {
self.rv(fd, FE_READ_SIGNAL_STRENGTH)
}
pub fn snr(&self, fd: RawFd) -> io::Result<usize> {
self.rv(fd, FE_READ_SNR)
}
pub fn ber(&self, fd: RawFd) -> io::Result<usize> {
self.rv(fd, FE_READ_BER)
}
pub fn unc(&self, fd: RawFd) -> io::Result<usize> {
self.rv(fd, FE_READ_UNCORRECTED_BLOCKS)
}
}
@ -191,14 +221,9 @@ impl Default for Event {
impl Event {
/// Reads frontend event
pub fn read(&mut self, fd: RawFd) -> io::Result<()> {
let x = unsafe {
libc::ioctl(fd, FE_GET_INFO, self as *mut Event as *mut libc::c_void)
};
if x == -1 {
Err(io::Error::last_os_error())
} else {
Ok(())
}
cvt(unsafe {
libc::ioctl(fd, FE_GET_INFO, self as *mut Event)
})
}
}
@ -240,13 +265,8 @@ impl Default for Properties {
impl Properties {
/// Writes properties set into frontend
pub fn write(&self, fd: RawFd) -> io::Result<()> {
let x = unsafe {
libc::ioctl(fd, FE_SET_PROPERTY, self as *const Properties as *const libc::c_void)
};
if x == -1 {
Err(io::Error::last_os_error())
} else {
Ok(())
}
cvt(unsafe {
libc::ioctl(fd, FE_SET_PROPERTY, self as *const Properties)
})
}
}