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imSp4rky
6e681af513
RollingMerge takes the segment path and an append hook. ISM synthesises the init from segment 0 and converts PIFF per fragment; HLS qualifies only with one init, one key and no discontinuity. Both parsers check the merge reached every segment, and resume is decided per track.
52 lines
1.7 KiB
Python
52 lines
1.7 KiB
Python
import io
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import random
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from concurrent.futures import Future
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from pathlib import Path
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from unshackle.core.manifests.dash import RollingMerge, append_segment
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def write_segments(save_dir: Path, payloads: list[bytes]) -> int:
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save_dir.mkdir()
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width = len(str(len(payloads)))
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for i, payload in enumerate(payloads):
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(save_dir / f"{i:0{width}d}.mp4").write_bytes(payload)
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return width
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def expected(init: bytes, payloads: list[bytes], is_text_subtitle: bool, tmp_path: Path) -> bytes:
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scratch = tmp_path / "scratch"
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width = write_segments(scratch, payloads)
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out = io.BytesIO()
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out.write(init)
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for i in range(len(payloads)):
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append_segment(out, scratch / f"{i:0{width}d}.mp4", is_text_subtitle)
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return out.getvalue()
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def test_out_of_order_segments_match_whole_merge(tmp_path: Path) -> None:
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rng = random.Random(7)
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payloads = [rng.randbytes(rng.randint(1, 4096)) for _ in range(23)]
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init = b"ftyp-moov"
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want = expected(init, payloads, False, tmp_path)
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save_dir = tmp_path / "segments"
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width = write_segments(save_dir, payloads)
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dst = io.BytesIO()
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dst.write(init)
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merger = RollingMerge(dst)
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order = list(range(len(payloads)))
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rng.shuffle(order)
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for index in order:
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future: Future = Future()
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future.set_result(None)
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merger.add(index, save_dir / f"{index:0{width}d}.mp4", future if index % 2 else None)
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# the cursor never rests on a segment that is ready: every contiguous run is drained
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assert merger.merged not in merger.ready
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assert merger.merged == len(payloads)
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assert dst.getvalue() == want
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assert dst.getvalue().startswith(init)
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assert list(save_dir.iterdir()) == []
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