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use libsamplerate_sys::*;
use std::ffi::CStr;
#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
pub enum ErrorCode {
Unknown = -1,
NoError = 0,
MallocFailed = 1,
BadState = 2,
BadData = 3,
BadDataPtr = 4,
NoPrivate = 5,
BadSrcRatio = 6,
BadProcPtr = 7,
ShiftBits = 8,
FilterLen = 9,
BadConverter = 10,
BadChannelCount = 11,
SincBadBufferLen = 12,
SizeIncompatibility = 13,
BadPrivPtr = 14,
BadSincState = 15,
DataOverlap = 16,
BadCallback = 17,
BadMode = 18,
NullCallback = 19,
NoVariableRatio = 20,
SincPrepareDataBadLen = 21,
BadInternalState = 22,
MaxError = 23,
}
impl ErrorCode {
pub fn from_int(value: i32) -> ErrorCode {
match value {
0 => ErrorCode::NoError,
1 => ErrorCode::MallocFailed,
2 => ErrorCode::BadState,
3 => ErrorCode::BadData,
4 => ErrorCode::BadDataPtr,
5 => ErrorCode::NoPrivate,
6 => ErrorCode::BadSrcRatio,
7 => ErrorCode::BadProcPtr,
8 => ErrorCode::ShiftBits,
9 => ErrorCode::FilterLen,
10 => ErrorCode::BadConverter,
11 => ErrorCode::BadChannelCount,
12 => ErrorCode::SincBadBufferLen,
13 => ErrorCode::SizeIncompatibility,
14 => ErrorCode::BadPrivPtr,
15 => ErrorCode::BadSincState,
16 => ErrorCode::DataOverlap,
17 => ErrorCode::BadCallback,
18 => ErrorCode::BadMode,
19 => ErrorCode::NullCallback,
20 => ErrorCode::NoVariableRatio,
21 => ErrorCode::SincPrepareDataBadLen,
22 => ErrorCode::BadInternalState,
23 => ErrorCode::MaxError,
_ => ErrorCode::Unknown,
}
}
pub fn description(&self) -> &'static str {
match self {
ErrorCode::Unknown => "Unkown error.",
_ => unsafe {
CStr::from_ptr(src_strerror(*self as i32))
}.to_str().unwrap()
}
}
}
#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
pub struct Error {
code: ErrorCode,
}
impl Error {
pub fn from_int(code: i32) -> Error {
Error {
code: ErrorCode::from_int(code),
}
}
pub fn from_code(code: ErrorCode) -> Error {
Error { code }
}
pub fn code(&self) -> ErrorCode {
self.code
}
pub fn description(&self) -> &'static str {
self.code.description()
}
}
impl std::fmt::Display for Error {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
write!(f, "{}", self.description())
}
}
impl std::error::Error for Error {
fn description(&self) -> &str {
&self.code.description()
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn create_converter_type_from_int() {
assert_eq!(ErrorCode::from_int(0), ErrorCode::NoError);
assert_eq!(ErrorCode::from_int(1), ErrorCode::MallocFailed);
assert_eq!(ErrorCode::from_int(2), ErrorCode::BadState);
assert_eq!(ErrorCode::from_int(3), ErrorCode::BadData);
assert_eq!(ErrorCode::from_int(4), ErrorCode::BadDataPtr);
assert_eq!(ErrorCode::from_int(5), ErrorCode::NoPrivate);
assert_eq!(ErrorCode::from_int(6), ErrorCode::BadSrcRatio);
assert_eq!(ErrorCode::from_int(7), ErrorCode::BadProcPtr);
assert_eq!(ErrorCode::from_int(8), ErrorCode::ShiftBits);
assert_eq!(ErrorCode::from_int(9), ErrorCode::FilterLen);
assert_eq!(ErrorCode::from_int(10), ErrorCode::BadConverter);
assert_eq!(ErrorCode::from_int(11), ErrorCode::BadChannelCount);
assert_eq!(ErrorCode::from_int(12), ErrorCode::SincBadBufferLen);
assert_eq!(ErrorCode::from_int(13), ErrorCode::SizeIncompatibility);
assert_eq!(ErrorCode::from_int(14), ErrorCode::BadPrivPtr);
assert_eq!(ErrorCode::from_int(15), ErrorCode::BadSincState);
assert_eq!(ErrorCode::from_int(16), ErrorCode::DataOverlap);
assert_eq!(ErrorCode::from_int(17), ErrorCode::BadCallback);
assert_eq!(ErrorCode::from_int(18), ErrorCode::BadMode);
assert_eq!(ErrorCode::from_int(19), ErrorCode::NullCallback);
assert_eq!(ErrorCode::from_int(20), ErrorCode::NoVariableRatio);
assert_eq!(ErrorCode::from_int(21), ErrorCode::SincPrepareDataBadLen);
assert_eq!(ErrorCode::from_int(22), ErrorCode::BadInternalState);
assert_eq!(ErrorCode::from_int(23), ErrorCode::MaxError);
assert_eq!(ErrorCode::from_int(24), ErrorCode::Unknown);
}
#[test]
fn description() {
assert_eq!(ErrorCode::NoError.description(), "No error.");
assert_eq!(ErrorCode::MallocFailed.description(), "Malloc failed.");
assert_eq!(ErrorCode::BadState.description(), "SRC_STATE pointer is NULL.");
assert_eq!(ErrorCode::BadData.description(), "SRC_DATA pointer is NULL.");
assert_eq!(ErrorCode::BadDataPtr.description(), "SRC_DATA->data_out or SRC_DATA->data_in is NULL.");
assert_eq!(ErrorCode::NoPrivate.description(), "Internal error. No private data.");
assert_eq!(ErrorCode::BadSrcRatio.description(), "SRC ratio outside [1/256, 256] range.");
assert_eq!(ErrorCode::BadSincState.description(), "src_process() called without reset after end_of_input.");
assert_eq!(ErrorCode::BadProcPtr.description(), "Internal error. No process pointer.");
assert_eq!(ErrorCode::ShiftBits.description(), "Internal error. SHIFT_BITS too large.");
assert_eq!(ErrorCode::FilterLen.description(), "Internal error. Filter length too large.");
assert_eq!(ErrorCode::BadConverter.description(), "Bad converter number.");
assert_eq!(ErrorCode::BadChannelCount.description(), "Channel count must be >= 1.");
assert_eq!(ErrorCode::SincBadBufferLen.description(), "Internal error. Bad buffer length. Please report this.");
assert_eq!(ErrorCode::SizeIncompatibility.description(), "Internal error. Input data / internal buffer size difference. Please report this.");
assert_eq!(ErrorCode::BadPrivPtr.description(), "Internal error. Private pointer is NULL. Please report this.");
assert_eq!(ErrorCode::DataOverlap.description(), "Input and output data arrays overlap.");
assert_eq!(ErrorCode::BadCallback.description(), "Supplied callback function pointer is NULL.");
assert_eq!(ErrorCode::BadMode.description(), "Calling mode differs from initialisation mode (ie process v callback).");
assert_eq!(ErrorCode::NullCallback.description(), "Callback function pointer is NULL in src_callback_read ().");
assert_eq!(ErrorCode::NoVariableRatio.description(), "This converter only allows constant conversion ratios.");
assert_eq!(ErrorCode::SincPrepareDataBadLen.description(), "Internal error : Bad length in prepare_data ().");
assert_eq!(ErrorCode::BadInternalState.description(), "Error : Someone is trampling on my internal state.");
assert_eq!(ErrorCode::MaxError.description(), "Placeholder. No error defined for this error number.");
assert_eq!(ErrorCode::Unknown.description(), "Unkown error.");
}
#[test]
fn error_from_code_and_int() {
assert_eq!(Error::from_int(2), Error::from_code(ErrorCode::BadState));
}
#[test]
fn error_description() {
for i in -1..24 {
assert_eq!(Error::from_int(i).description(), ErrorCode::from_int(i).description());
}
}
}