975cf4cf3d
Some Monochrome instances only have 30-second Tidal DOWNLOAD access: the HLS variant playlist for a 220s track comes back as ~30s of segments + ENDLIST (verified live on us-west.monochrome.tf — lossless=30s, hires=403). The client downloaded that 30s file, which then got quarantined by the new audio guard. Detect it at manifest time: sum the playlist's EXTINF runtime and compare to the track's real duration (get_track_info). When the playlist is < 85% of the track, decline the manifest and rotate the instance, so the download falls through to a real source (Soulseek/Qobuz/Tidal/Deezer) instead of fetching a preview. Best-effort — unknown duration disables the check (the post-download audio guard remains the safety net). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
70 lines
1.9 KiB
Python
70 lines
1.9 KiB
Python
"""HiFi/Monochrome preview detection.
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Some Monochrome instances only have 30-second Tidal preview access for
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usage=DOWNLOAD: the HLS variant playlist for a 220s track contains only ~30s
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of segments (with #EXT-X-ENDLIST). Detect that at manifest time so HiFi
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declines and the orchestrator falls through to a real source — instead of
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downloading the 30s file and quarantining it after the fact.
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"""
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import sys
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import types
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import pytest
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# hifi_client imports config/db at module load; stub the heavy bits if needed.
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from core.hifi_client import hls_total_seconds, is_preview_playlist
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_PREVIEW_PLAYLIST = """#EXTM3U
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#EXT-X-VERSION:6
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#EXT-X-PLAYLIST-TYPE:VOD
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#EXT-X-TARGETDURATION:4
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#EXTINF:3.994,
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seg1.mp4
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#EXTINF:3.994,
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seg2.mp4
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#EXTINF:3.994,
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seg3.mp4
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#EXTINF:3.994,
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seg4.mp4
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#EXTINF:3.994,
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seg5.mp4
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#EXTINF:3.994,
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seg6.mp4
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#EXTINF:3.994,
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seg7.mp4
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#EXTINF:1.9,
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seg8.mp4
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#EXT-X-ENDLIST
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"""
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def test_total_seconds_sums_extinf():
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assert hls_total_seconds(_PREVIEW_PLAYLIST) == pytest.approx(29.86, abs=0.1)
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def test_total_seconds_empty():
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assert hls_total_seconds("") == 0.0
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assert hls_total_seconds("#EXTM3U\nno segments\n") == 0.0
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def test_preview_when_playlist_far_shorter_than_track():
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# 30s playlist for a 220s track → preview.
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assert is_preview_playlist(playlist_s=29.9, track_s=220) is True
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def test_not_preview_when_playlist_matches_track():
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assert is_preview_playlist(playlist_s=218.0, track_s=220) is False
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def test_not_preview_when_track_duration_unknown():
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# No reference → can't decide; don't false-positive (post-download guard
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# is the safety net).
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assert is_preview_playlist(playlist_s=29.9, track_s=0) is False
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assert is_preview_playlist(playlist_s=0, track_s=220) is False
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def test_short_real_track_not_flagged():
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# A genuinely ~30s track whose playlist is ~30s is not a preview.
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assert is_preview_playlist(playlist_s=29.0, track_s=31) is False
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