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slowrx is a GTK GUI app that doesn't support CLI usage, so the SSTV decoder was silently failing. This replaces it with a pure Python implementation using numpy and Pillow that supports Robot36/72, Martin1/2, Scottie1/2, and PD120/180 modes via VIS header auto-detection. Key implementation details: - Generalized Goertzel (DTFT) for exact-frequency tone detection - Vectorized batch Goertzel for real-time pixel decoding performance - Overlapping analysis windows for short-window frequency estimation - VIS header detection state machine with parity validation - Per-line sync re-synchronization for drift tolerance Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
34 lines
780 B
Python
34 lines
780 B
Python
"""SSTV (Slow-Scan Television) decoder package.
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Pure Python SSTV decoder using Goertzel-based DSP for VIS header detection
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and scanline-by-scanline image decoding. Supports Robot36/72, Martin1/2,
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Scottie1/2, and PD120/180 modes.
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Replaces the external slowrx dependency with numpy/scipy + Pillow.
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"""
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from .constants import ISS_SSTV_FREQ, SSTV_MODES
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from .sstv_decoder import (
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DecodeProgress,
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DopplerInfo,
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DopplerTracker,
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SSTVDecoder,
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SSTVImage,
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get_general_sstv_decoder,
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get_sstv_decoder,
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is_sstv_available,
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)
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__all__ = [
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'DecodeProgress',
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'DopplerInfo',
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'DopplerTracker',
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'ISS_SSTV_FREQ',
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'SSTV_MODES',
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'SSTVDecoder',
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'SSTVImage',
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'get_general_sstv_decoder',
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'get_sstv_decoder',
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'is_sstv_available',
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]
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