j2k-cuda 0.6.1

NVIDIA CUDA GPU adapter for Rust JPEG 2000 and HTJ2K decode/encode paths
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62

// SPDX-License-Identifier: Apache-2.0

use j2k::J2kError;
use j2k_core::{BackendRequest, BufferError, CodecError};

/// Error returned by the CUDA JPEG 2000 adapter.
#[derive(Debug, thiserror::Error)]
#[non_exhaustive]
pub enum Error {
    /// CPU JPEG 2000 decode failed.
    #[error(transparent)]
    Decode(#[from] J2kError),
    /// Caller-owned output buffers were invalid.
    #[error(transparent)]
    Buffer(#[from] BufferError),
    /// Backend request is unsupported by this adapter.
    #[error("backend request {request:?} is not supported by j2k-cuda")]
    UnsupportedBackend {
        /// Requested backend.
        request: BackendRequest,
    },
    /// CUDA request is unsupported by the strict CUDA adapter contract.
    #[error("unsupported CUDA request: {reason}")]
    UnsupportedCudaRequest {
        /// Human-readable rejection reason.
        reason: &'static str,
    },
    /// CUDA runtime or device is unavailable.
    #[error("CUDA is unavailable on this host")]
    CudaUnavailable,
    #[cfg(feature = "cuda-runtime")]
    /// CUDA runtime returned an error.
    #[error("CUDA runtime error: {message}")]
    CudaRuntime {
        /// Runtime error message.
        message: String,
    },
}

impl CodecError for Error {
    fn is_truncated(&self) -> bool {
        matches!(self, Self::Decode(inner) if inner.is_truncated())
    }

    fn is_not_implemented(&self) -> bool {
        matches!(self, Self::Decode(inner) if inner.is_not_implemented())
    }

    fn is_unsupported(&self) -> bool {
        matches!(
            self,
            Self::UnsupportedBackend { .. }
                | Self::UnsupportedCudaRequest { .. }
                | Self::CudaUnavailable
        ) || matches!(self, Self::Decode(inner) if inner.is_unsupported())
    }

    fn is_buffer_error(&self) -> bool {
        matches!(self, Self::Buffer(_))
            || matches!(self, Self::Decode(inner) if inner.is_buffer_error())
    }
}