63 lines
2.7 KiB
Python
63 lines
2.7 KiB
Python
#!/usr/bin/env python3
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# Embed the C64 attract-demo recorded input streams (the four
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# "SPACETAXI 0x" disk files -- RLE [joystick mask][tick count] pairs;
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# mask bit0=UP bit1=DOWN bit2=LEFT bit3=RIGHT, bit7 always set, no
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# fire bit -- which is why every recorded ride ends in a crash: the
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# demo cab can never lower its gear) as C arrays for stDemoStreams.h.
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#
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# Every stream file is odd-length: the $9936 saver's end=$3F+3
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# off-by-one appends one dangling byte past the last complete pair,
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# trimmed here on all four.
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#
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# Rotation order is H -> W -> T -> X ($6FE2/$50C1 trace) with file
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# mapping H=01, T=02, W=03, X=04 and demo levels H=8, W=23, T=20,
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# X=24 (1-based).
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import os
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HERE = os.path.dirname(os.path.abspath(__file__))
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EXTRACT = os.path.join(HERE, "..", "..", "..", "stuff", "spacetaxi", "extract")
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OUT = os.path.join(HERE, "..", "stDemoStreams.h")
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# (file, symbol, 0-based level index, screen letter) in ROTATION order.
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STREAMS = [
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("SPACETAXI 01_N0S.prg", "kDemoStreamH", 7, "H"),
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("SPACETAXI 03_N0S.prg", "kDemoStreamW", 22, "W"),
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("SPACETAXI 02_N0S.prg", "kDemoStreamT", 19, "T"),
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("SPACETAXI 04_N0S.prg", "kDemoStreamX", 23, "X"),
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]
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def main():
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with open(OUT, "w", encoding="ascii") as f:
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f.write("// Generated by assets/genDemoStreams.py -- do not hand-edit.\n")
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f.write("// C64 attract-demo recorded input streams (see the generator\n")
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f.write("// for format notes). Rotation order H, W, T, X.\n\n")
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f.write("#ifndef ST_DEMO_STREAMS_H\n#define ST_DEMO_STREAMS_H\n\n")
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f.write("#include <stdint.h>\n\n")
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entries = []
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for fname, sym, level, letter in STREAMS:
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data = open(os.path.join(EXTRACT, fname), "rb").read()
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if len(data) % 2 == 1:
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data = data[:-1] # trim the saver's dangling byte
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f.write(f"// {letter}: {fname} ({len(data)} bytes after trim)\n")
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f.write(f"static const uint8_t {sym}[{len(data)}] = {{\n")
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for i in range(0, len(data), 12):
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row = ", ".join(f"0x{b:02X}" for b in data[i:i + 12])
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f.write(f" {row},\n")
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f.write("};\n\n")
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entries.append((sym, len(data), level))
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f.write("typedef struct {\n")
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f.write(" const uint8_t *stream;\n")
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f.write(" uint16_t length;\n")
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f.write(" uint8_t levelIndex; // 0-based\n")
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f.write("} StDemoEntryT;\n\n")
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f.write(f"static const StDemoEntryT kDemoRotation[{len(entries)}] = {{\n")
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for sym, ln, level in entries:
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f.write(f" {{ {sym}, {ln}u, {level}u }},\n")
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f.write("};\n\n#endif\n")
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print(f"wrote {OUT}")
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if __name__ == "__main__":
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main()
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