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Brandon ThomasandClaude Opus 5.5
a2ac32916b
New crate filmcraft-h264 (L0, depends only on filmcraft-bitstream): - SPS incl. VUI/HRD, scaling lists with fall-back rules A/B, frame cropping, high-profile chroma_format_idc / bit depth fields, DPB size from level - PPS incl. transform_8x8_mode, scaling lists, slice groups (parse only) - slice header: all fields incl. ref_pic_list_modification, pred_weight_table, dec_ref_pic_marking - POC types 0/1/2 (incl. MMCO5 handling and frame_num gap hooks) - default scaling / QPc / deblocking tables from the public ITU-T spec - ffmpeg/libx264 fixture generator for tests (skips when ffmpeg is absent) Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
39 lines
1.2 KiB
Rust
39 lines
1.2 KiB
Rust
use filmcraft_bitstream::BitError;
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/// Errors produced by the decoder.
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#[derive(Debug, Clone, PartialEq, Eq, thiserror::Error)]
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pub enum Error {
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/// The bitstream ended early or contained an invalid Exp-Golomb code.
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#[error("bitstream error: {0}")]
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Bitstream(#[from] BitError),
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/// A syntax element had a value outside its legal range.
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#[error("invalid bitstream: {0}")]
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Invalid(String),
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/// A valid feature this decoder does not implement (yet).
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#[error("unsupported: {0}")]
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Unsupported(String),
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/// A slice referenced a parameter set that has not been received.
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#[error("missing parameter set: {0}")]
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MissingParameterSet(String),
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}
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pub type Result<T> = std::result::Result<T, Error>;
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pub(crate) fn invalid<T>(msg: impl Into<String>) -> Result<T> {
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Err(Error::Invalid(msg.into()))
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}
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pub(crate) fn unsupported<T>(msg: impl Into<String>) -> Result<T> {
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Err(Error::Unsupported(msg.into()))
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}
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/// `ensure!(cond, "message")` returns `Error::Invalid` when `cond` is false.
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macro_rules! ensure {
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($cond:expr, $($arg:tt)+) => {
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if !$cond {
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return Err($crate::error::Error::Invalid(format!($($arg)+)));
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}
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};
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}
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pub(crate) use ensure;
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