126 lines
2.7 KiB
Python
126 lines
2.7 KiB
Python
"""Constants for SSTV specification and each supported mode"""
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from enum import Enum
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class COL_FMT(Enum):
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RGB = 1
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GBR = 2
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YUV = 3
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BW = 4
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class M1(object):
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NAME = "Martin 1"
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COLOR = COL_FMT.GBR
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LINE_WIDTH = 320
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LINE_COUNT = 256
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SCAN_TIME = 0.146432
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SYNC_PULSE = 0.004862
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SYNC_PORCH = 0.000572
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SEP_PULSE = 0.000572
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CHAN_COUNT = 3
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CHAN_SYNC = 0
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CHAN_TIME = SEP_PULSE + SCAN_TIME
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CHAN_OFFSETS = [SYNC_PULSE + SYNC_PORCH]
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CHAN_OFFSETS.append(CHAN_OFFSETS[0] + CHAN_TIME)
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CHAN_OFFSETS.append(CHAN_OFFSETS[1] + CHAN_TIME)
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LINE_TIME = SYNC_PULSE + SYNC_PORCH + 3 * CHAN_TIME
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PIXEL_TIME = SCAN_TIME / LINE_WIDTH
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WINDOW_FACTOR = 2.34
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HAS_START_SYNC = False
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HAS_MERGE_SCAN = False
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class M2(M1):
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NAME = "Martin 2"
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LINE_WIDTH = 320
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SCAN_TIME = 0.073216
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SYNC_PULSE = 0.004862
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SYNC_PORCH = 0.000572
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SEP_PULSE = 0.000572
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CHAN_TIME = SEP_PULSE + SCAN_TIME
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CHAN_OFFSETS = [SYNC_PULSE + SYNC_PORCH]
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CHAN_OFFSETS.append(CHAN_OFFSETS[0] + CHAN_TIME)
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CHAN_OFFSETS.append(CHAN_OFFSETS[1] + CHAN_TIME)
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LINE_TIME = SYNC_PULSE + SYNC_PORCH + 3 * CHAN_TIME
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PIXEL_TIME = SCAN_TIME / LINE_WIDTH
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WINDOW_FACTOR = 4.68
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class S1(object):
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NAME = "Scottie 1"
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COLOR = COL_FMT.GBR
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LINE_WIDTH = 320
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LINE_COUNT = 256
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SCAN_TIME = 0.138240
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SYNC_PULSE = 0.009000
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SYNC_PORCH = 0.001500
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SEP_PULSE = 0.001500
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CHAN_COUNT = 3
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CHAN_SYNC = 2
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CHAN_TIME = SEP_PULSE + SCAN_TIME
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CHAN_OFFSETS = [SYNC_PULSE + SYNC_PORCH + CHAN_TIME]
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CHAN_OFFSETS.append(CHAN_OFFSETS[0] + CHAN_TIME)
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CHAN_OFFSETS.append(SYNC_PULSE + SYNC_PORCH)
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LINE_TIME = SYNC_PULSE + 3 * CHAN_TIME
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PIXEL_TIME = SCAN_TIME / LINE_WIDTH
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WINDOW_FACTOR = 2.48
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HAS_START_SYNC = True
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HAS_MERGE_SCAN = False
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class R36(object):
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NAME = "Robot 36"
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COLOR = COL_FMT.YUV
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LINE_WIDTH = 320
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LINE_COUNT = 240
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SCAN_TIME = 0.088000
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MERGE_SCAN_TIME = 0.044000
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SYNC_PULSE = 0.009000
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SYNC_PORCH = 0.003000
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SEP_PULSE = 0.004500
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SEP_PORCH = 0.001500
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CHAN_COUNT = 2
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CHAN_SYNC = 0
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CHAN_TIME = SEP_PULSE + SCAN_TIME
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CHAN_OFFSETS = [SYNC_PULSE + SYNC_PORCH]
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CHAN_OFFSETS.append(CHAN_OFFSETS[0] + CHAN_TIME + SEP_PORCH)
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LINE_TIME = CHAN_OFFSETS[1] + MERGE_SCAN_TIME
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PIXEL_TIME = SCAN_TIME / LINE_WIDTH
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MERGE_PIXEL_TIME = MERGE_SCAN_TIME / LINE_WIDTH
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WINDOW_FACTOR = 7.70
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HAS_START_SYNC = False
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HAS_MERGE_SCAN = True
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VIS_MAP = {44: M1, 40: M2, 60: S1, 8: R36}
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BREAK_OFFSET = 0.300
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LEADER_OFFSET = 0.010 + BREAK_OFFSET
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VIS_START_OFFSET = 0.300 + LEADER_OFFSET
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HDR_SIZE = 0.030 + VIS_START_OFFSET
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HDR_WINDOW_SIZE = 0.010
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VIS_BIT_SIZE = 0.030
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