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av1: count repeated-frame outputs as they are added

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This commit is contained in:
Dylan M. Taylor
2026-11-03 11:42:08 +00:00
parent 8ec4f6cabb
commit 5593992665
1 changed files with 4 additions and 1 deletions
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crates/av1/src/decoder.rs
+4 -1
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@@ -425,6 +425,8 @@ impl Decoder {
fn parse_obus(&mut self, data: &[u8], out: &mut Vec<(Output, usize, u32)>) -> Result<()> {
let mut tu = 0usize;
// Repeated-frame outputs in `out`, counted as they are added rather than recounted per OBU.
let mut existing = out.iter().filter(|(o, _, _)| matches!(o, Output::Existing { .. })).count();
let mut pos = 0;
while pos < data.len() {
let obu = parse_obu_unit(data, pos)?;
@@ -444,9 +446,10 @@ impl Decoder {
}
OBU_FRAME_HEADER_T | OBU_REDUNDANT_FRAME_HEADER_T | OBU_FRAME_T => {
if let Some(o) = self.frame_obu(&obu)? {
if out.iter().filter(|(o, _, _)| matches!(o, Output::Existing { .. })).count() >= 32 {
if existing >= 32 {
return Err(Error::Invalid("too many frame outputs in chunk"));
}
existing += usize::from(matches!(o, Output::Existing { .. }));
out.push((o, tu, spatial_id));
}
}