Add PD-120, not really working yet

sstv/spec.py

@@ -182,6 +182,35 @@ class R72(R36):
 
     HAS_ALT_SCAN = False
 
+class PD120(object):
+    NAME = "PD-120"
+
+    COLOR = COL_FMT.YUV
+    LINE_WIDTH = 640
+    LINE_COUNT = 496
+    SCAN_TIME = 0.121600
+    HALF_SCAN_TIME = 0.069000
+    SYNC_PULSE = 0.020000
+    SYNC_PORCH = 0.002080
+    SEP_PULSE = 0.000000
+    SEP_PORCH = 0.001500
+
+    CHAN_COUNT = 3
+    CHAN_SYNC = 2
+    CHAN_TIME = SEP_PULSE + SCAN_TIME
+    HALF_CHAN_TIME = SEP_PULSE + HALF_SCAN_TIME
+
+    CHAN_OFFSETS = [SYNC_PULSE + SYNC_PORCH]
+    CHAN_OFFSETS.append(CHAN_OFFSETS[0] + CHAN_TIME + SEP_PORCH)
+    CHAN_OFFSETS.append(CHAN_OFFSETS[1] + HALF_CHAN_TIME + SEP_PORCH)
+
+    LINE_TIME = SYNC_PULSE + 3 * CHAN_TIME
+    PIXEL_TIME = SCAN_TIME / LINE_WIDTH
+    WINDOW_FACTOR = 3.933
+
+    HAS_START_SYNC = True
+    HAS_HALF_SCAN = False
+    HAS_ALT_SCAN = False
 
 VIS_MAP = {8: R36,
            12: R72,
@@ -189,7 +218,8 @@ VIS_MAP = {8: R36,
            44: M1,
            56: S2,
            60: S1,
-           76: SDX}
+           76: SDX,
+           95: PD120}
 
 BREAK_OFFSET = 0.300
 LEADER_OFFSET = 0.010 + BREAK_OFFSET