beefcarver
48e480d58c
SYNC mode on macOS needed a virtual loopback driver (BlackHole, Loopback, Soundflower) routed through a Multi-Output Device, and shelled out to 'ffmpeg -f avfoundation' to read it. macOS 14.2 lets a process tap the system mix directly, so do that instead: CATapDescription -> AudioHardwareCreateProcessTap -> private aggregate device -> IOProc, straight through ctypes. No driver, no helper binary, no ffmpeg. The tap hands out native-rate interleaved float32, so the analyser can now retune its window and band edges when the capture rate differs from 44.1 kHz, and mono-downmixes the frames before the FFT. A tap that was never granted System Audio Recording permission is created happily but only ever delivers digital silence: treat that as a failed capture instead of flat bars, explain it in the status bar and fall back to the stream tap. A tap that renders nothing *yet* (playback still starting, or mpv pointed at another device) is not a permanent failure either - the stream tap covers for a minute, then the tap is retried. Drop the avfoundation device enumeration, the loopback-name heuristics and the microphone safeguards' tests, and document the new permission and its diagnostics instead.
35 lines
1.0 KiB
Python
35 lines
1.0 KiB
Python
from __future__ import annotations
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import pytest
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from somafm_tui import macos_tap
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def test_osstatus_decodes_four_character_codes() -> None:
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# 'who?' is kAudioHardwareBadObjectError.
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assert macos_tap._osstatus(int.from_bytes(b"who?", "big")) == "'who?'"
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assert macos_tap._osstatus(-50) == "-50"
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def test_start_raises_without_the_native_api(monkeypatch) -> None:
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monkeypatch.setattr(macos_tap, "available", lambda: False)
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tap = macos_tap.SystemAudioTap()
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with pytest.raises(macos_tap.TapError):
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tap.start()
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assert tap.running is False
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tap.stop() # tearing down a tap that never started is safe
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def test_read_returns_none_when_not_running() -> None:
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tap = macos_tap.SystemAudioTap()
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assert tap.read(0.0) is None
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def test_uses_no_external_helpers() -> None:
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# The tap must never shell out: no helper binary, no ffmpeg, no driver.
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import inspect
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source = inspect.getsource(macos_tap).casefold()
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assert "subprocess" not in source
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assert "avfoundation" not in source
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