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#!/usr/bin/env python3
"""Convert .track files from beat-based to unit-less timing."""
import re
import sys
def convert_beat_to_unit(beat_str):
"""Convert beat value to unit-less (beat / 4)."""
beat = float(beat_str)
unit = beat / 4.0
return f"{unit:.2f}"
def process_line(line):
"""Process a single line, converting beat values."""
line = line.rstrip('\n')
# Skip comments and empty lines
if not line.strip() or line.strip().startswith('#'):
return line
# PATTERN line - add LENGTH 1.0
if line.strip().startswith('PATTERN '):
# Check if LENGTH already exists
if ' LENGTH ' in line:
return line
parts = line.split()
if len(parts) >= 2:
return f"PATTERN {parts[1]} LENGTH 1.0"
return line
# Event line (starts with a number)
match = re.match(r'^(\s*)([0-9.]+),\s*(.+)$', line)
if match:
indent, beat_str, rest = match.groups()
unit_str = convert_beat_to_unit(beat_str)
return f"{indent}{unit_str}, {rest}"
return line
def main():
if len(sys.argv) != 3:
print(f"Usage: {sys.argv[0]} <input.track> <output.track>")
sys.exit(1)
input_file = sys.argv[1]
output_file = sys.argv[2]
with open(input_file, 'r') as f:
lines = f.readlines()
# Add header comment about timing
output_lines = []
output_lines.append("# Enhanced Demo Track - Progressive buildup with varied percussion\n")
output_lines.append("# Features acceleration/deceleration with diverse samples and melodic progression\n")
output_lines.append("#\n")
output_lines.append("# TIMING: Unit-less (1 unit = 4 beats at 120 BPM = 2 seconds)\n")
output_lines.append("# Pattern events use unit-less time (0.0-1.0 for 4-beat pattern)\n")
output_lines.append("# Score triggers use unit-less time\n")
# Skip old header lines
start_idx = 0
for i, line in enumerate(lines):
if line.strip() and not line.strip().startswith('#'):
start_idx = i
break
# Process rest of file
for line in lines[start_idx:]:
output_lines.append(process_line(line) + '\n')
with open(output_file, 'w') as f:
f.writelines(output_lines)
print(f"Converted {input_file} -> {output_file}")
if __name__ == '__main__':
main()
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