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use std::error::Error;
use std::fmt::Error as FmtError;
use std::fmt::{Display, Formatter};
use gst;
#[macro_export]
macro_rules! panic_to_error(
($element:expr, $panicked:expr, $ret:expr, $code:block) => {{
use std::panic::{self, AssertUnwindSafe};
use std::sync::atomic::Ordering;
if $panicked.load(Ordering::Relaxed) {
$element.post_error_message(&gst_error_msg!(gst::LibraryError::Failed, ["Panicked"]));
$ret
} else {
let result = panic::catch_unwind(AssertUnwindSafe(|| $code));
match result {
Ok(result) => result,
Err(err) => {
$panicked.store(true, Ordering::Relaxed);
if let Some(cause) = err.downcast_ref::<&str>() {
$element.post_error_message(&gst_error_msg!(gst::LibraryError::Failed, ["Panicked: {}", cause]));
} else if let Some(cause) = err.downcast_ref::<String>() {
$element.post_error_message(&gst_error_msg!(gst::LibraryError::Failed, ["Panicked: {}", cause]));
} else {
$element.post_error_message(&gst_error_msg!(gst::LibraryError::Failed, ["Panicked"]));
}
$ret
}
}
}
}};
);
#[derive(Clone, Debug, PartialEq, Eq)]
pub enum FlowError {
Flushing,
Eos,
NotNegotiated(gst::ErrorMessage),
Error(gst::ErrorMessage),
}
impl From<FlowError> for gst::FlowReturn {
fn from(err: FlowError) -> Self {
gst::FlowReturn::from(&err)
}
}
impl<'a> From<&'a FlowError> for gst::FlowReturn {
fn from(err: &FlowError) -> gst::FlowReturn {
match *err {
FlowError::Flushing => gst::FlowReturn::Flushing,
FlowError::Eos => gst::FlowReturn::Eos,
FlowError::NotNegotiated(..) => gst::FlowReturn::NotNegotiated,
FlowError::Error(..) => gst::FlowReturn::Error,
}
}
}
impl Display for FlowError {
fn fmt(&self, f: &mut Formatter) -> Result<(), FmtError> {
match *self {
FlowError::Flushing | FlowError::Eos => f.write_str(self.description()),
FlowError::NotNegotiated(ref m) => {
f.write_fmt(format_args!("{}: {}", self.description(), m))
}
FlowError::Error(ref m) => f.write_fmt(format_args!("{}: {}", self.description(), m)),
}
}
}
impl Error for FlowError {
fn description(&self) -> &str {
match *self {
FlowError::Flushing => "Flushing",
FlowError::Eos => "Eos",
FlowError::NotNegotiated(..) => "Not Negotiated",
FlowError::Error(..) => "Error",
}
}
}