1 // Copyright 2022-2024 The ChromiumOS Authors
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 use libc::c_int;
6
7 // Equivalent of FFmpeg's `FFERRTAG` macro to generate error codes.
8 #[allow(non_snake_case)]
FFERRTAG(tag: &[u8; 4]) -> c_int9 const fn FFERRTAG(tag: &[u8; 4]) -> c_int {
10 -(tag[0] as c_int | (tag[1] as c_int) << 8 | (tag[2] as c_int) << 16 | (tag[3] as c_int) << 24)
11 }
12
13 pub const AVERROR_EOF: c_int = FFERRTAG(b"EOF ");
14 pub const AVERROR_INVALIDDATA: c_int = FFERRTAG(b"INDA");
15 pub const AVERROR_EAGAIN: c_int = -11;
16
17 #[cfg(test)]
18 mod test {
19 use libc::c_char;
20
21 use super::*;
22 use crate::ffmpeg::ffi;
23
test_averror(averror: c_int, expected_message: &str)24 fn test_averror(averror: c_int, expected_message: &str) {
25 let mut buffer = [0u8; 255];
26 // TODO(b:315859322): add safety doc string
27 #[allow(clippy::undocumented_unsafe_blocks)]
28 let ret =
29 unsafe { ffi::av_strerror(averror, buffer.as_mut_ptr() as *mut c_char, buffer.len()) };
30 assert_eq!(ret, 0);
31
32 let end_of_string = buffer.iter().position(|i| *i == 0).unwrap_or(buffer.len());
33 let error_string = std::str::from_utf8(&buffer[0..end_of_string]).unwrap();
34 assert_eq!(error_string, expected_message);
35 }
36
37 #[test]
38 // Check that we got our error bindings correctly.
test_error_bindings()39 fn test_error_bindings() {
40 test_averror(AVERROR_EOF, "End of file");
41 test_averror(
42 AVERROR_INVALIDDATA,
43 "Invalid data found when processing input",
44 );
45 test_averror(AVERROR_EAGAIN, "Resource temporarily unavailable");
46 }
47 }
48