ii-sound/generate_player.py

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import enum
import itertools
import numpy
from typing import Iterable, List, Tuple
class Opcode(enum.Enum):
NOP = 1
NOP3 = 2
STA = 3
STAX = 4
INC = 5
INCX = 6
JMP_INDIRECT = 7
# Byte length of opcodes
OPCODE_LEN = {
Opcode.NOP: 1, Opcode.NOP3: 2, Opcode.STA: 3, Opcode.STAX: 3,
Opcode.INC: 3, Opcode.INCX: 3, Opcode.JMP_INDIRECT: 3
}
ASM = {
Opcode.NOP: "NOP", Opcode.NOP3: "STA zpdummy",
Opcode.STA: "STA $C030", Opcode.STAX: "STA $C030,X",
Opcode.INC: "INC $C030", Opcode.INCX: "INC $C030,X",
Opcode.JMP_INDIRECT: "JMP (WDATA)"
}
# Applied speaker voltages resulting from executing opcode
VOLTAGES = {
Opcode.STA: [1, 1, 1, -1],
Opcode.INC: [1, 1, 1, -1, 1, -1],
Opcode.INCX: [1, 1, 1, -1, 1, -1, 1],
Opcode.STAX: [1, 1, 1, -1, 1],
Opcode.NOP: [1, 1],
Opcode.NOP3: [1, 1, 1],
Opcode.JMP_INDIRECT: [1, 1, 1, 1, 1, 1],
}
def voltage_sequence(
opcodes: Iterable[Opcode], starting_voltage=1.0) -> numpy.ndarray:
"""Voltage sequence for sequence of opcodes."""
out = []
v = starting_voltage
for op in opcodes:
for nv in v * numpy.array(VOLTAGES[op]):
v = nv
out.append(v)
return numpy.array(out, dtype=numpy.float64)
def all_opcodes(
max_len: int, opcodes: Iterable[Opcode]
) -> Iterable[Tuple[Opcode]]:
"""Enumerate all combinations of opcodes up to max_len cycles"""
num_opcodes = 0
while True:
found_one = False
for ops in itertools.product(opcodes, repeat=num_opcodes):
ops = tuple(list(ops) + [Opcode.JMP_INDIRECT])
if sum(len(VOLTAGES[o]) for o in ops) <= max_len:
found_one = True
yield ops
if not found_one:
break
num_opcodes += 1
def generate_player(max_cycles: int, opcodes: List[Opcode],
opcode_filename: str,
player_filename: str):
num_bytes = 0
seqs = {}
num_op = 0
offset = 0
unique_opcodes = {}
all_ops = sorted(
list(all_opcodes(max_cycles, opcodes)),
key=lambda o: len(o), reverse=True)
with open(player_filename, "w+") as f:
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for i, k in enumerate(all_ops):
is_unique = False
player_op = []
player_op_len = 0
new_offset = offset
for j, o in enumerate(k):
seq = tuple(voltage_sequence(k[j:], 1.0))
dup = seqs.setdefault(seq, i)
if dup == i:
player_op.append("tick_%02x: ; voltages %s" % (
new_offset, seq))
is_unique = True
unique_opcodes[new_offset] = seq
player_op.append(" %s" % ASM[o])
player_op_len += OPCODE_LEN[o]
new_offset += OPCODE_LEN[o]
player_op.append("\n")
# If at least one of the partial opcode sequences was not
# a dup, then add it to the player
if is_unique:
num_op += 1
f.write("\n".join(player_op))
num_bytes += player_op_len
offset = new_offset
f.write("; %d bytes\n" % num_bytes)
with open(opcode_filename, "w") as f:
f.write("import enum\n\n\n")
f.write("class Opcode(enum.Enum):\n")
for o in unique_opcodes.keys():
f.write(" TICK_%02x = 0x%02x\n" % (o, o))
f.write(" EXIT = 0x%02x\n" % (o + 3))
f.write(" SLOWPATH = 0x%02x\n" % (o + 6))
f.write("\n\nVOLTAGE_SCHEDULE = {\n")
for o, v in unique_opcodes.items():
f.write(
" Opcode.TICK_%02x: numpy.array(%s, dtype=numpy.float64),"
"\n" % (o, v))
f.write("}\n")
if __name__ == "__main__":
generate_player(
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max_cycles=16,
# Opcode.NOP3,
opcodes=[Opcode.NOP, Opcode.STA, Opcode.INC, Opcode.STAX, Opcode.INCX],
opcode_filename="opcode_inc.py",
player_filename="player_inc.s"
)