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https://github.com/storytold/craft-libs.git
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Dylan M. Taylor
5e892217ed
* craft-video: MPEG-2 and MPEG-1 video decoder from FilmCraft (`mpeg2`) FilmCraft's crates/mpeg2v at 4bec22bd moves to craft_video::mpeg2 behind the decoder-only feature `mpeg2`: sources, README and tests (unit, synthetic streams checked by ffmpeg, the ffmpeg oracle fixtures, hostile sweeps). Changes in the move: craft-media-testkit instead of filmcraft-testkit, one test target (tests/mpeg2), crate paths, rustfmt at this repo's width. New: a memory budget (Decoder::set_memory_budget, craft_video::budget) checked when a sequence becomes active, and a mutation test over the synthetic field-picture, 16x8 and dual-prime streams, which ffmpeg's encoder cannot produce and the hostile sweep therefore never reached. * craft-video mpeg2: write the restart check without a negated conjunction (clippy nonminimal_bool)
38 lines
1.3 KiB
Rust
38 lines
1.3 KiB
Rust
//! Decode speed (ignored; run with `cargo test --release -p craft-video --features mpeg2,threads --test mpeg2 perf:: --
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//! --ignored --nocapture`). Uses the 1080i fixture of `tests/mpeg2/oracle.rs` (ffmpeg-encoded, 25 Mb/s).
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use crate::common;
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use common::*;
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#[test]
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#[ignore]
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fn perf_1080i_decode_fps() {
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let Some(ff) = craft_media_testkit::ffmpeg_or_skip("mpeg2 perf") else { return };
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let f = make(&ff, &HD1080I).expect("fixture");
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let es = std::fs::read(&f).unwrap();
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let aus = craft_video::mpeg2::access_units(&es);
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for threads in [false, true] {
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let mut best = f64::MAX;
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let mut frames = 0;
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for _ in 0..5 {
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let mut d = craft_video::mpeg2::Decoder::new();
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d.set_threads(threads);
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let t0 = std::time::Instant::now();
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let mut n = 0;
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for (i, r) in aus.iter().enumerate() {
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n += d.decode(&es[r.clone()], i as i64).unwrap().len();
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}
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n += d.flush().len();
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best = best.min(t0.elapsed().as_secs_f64());
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frames = n;
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}
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println!(
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"1080i25 MPEG-2 (4:2:0, 25 Mb/s, IBBP): {frames} frames in {:.1} ms = {:.1} fps ({})",
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best * 1e3,
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frames as f64 / best,
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if threads { "slice rows on rayon" } else { "single thread" }
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);
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}
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}
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