mirror of
https://github.com/robbert-vdh/yabridge.git
synced 2026-05-06 19:40:10 +02:00
Robbert van der Helm
119 lines
4.2 KiB
Python
Executable File
119 lines
4.2 KiB
Python
Executable File
#!/usr/bin/env python3
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import argparse
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import os
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import re
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import textwrap
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# Parsing XML with regular expressions, what could go wrong! I'll make the
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# assumption that the plugin developers were kind and did not include any
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# double quotes in their plugin names, and that the order of attributes saved
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# by Ardour is stable. This regexp will find VST3 plugins in a .ardour XML file
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# and capture its name and class ID.
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ARDOUR_VST3_RE = re.compile(
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r'name="([^"]+)".+type="vst3".+unique-id="([0-9a-zA-Z]{32})"'
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)
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parser = argparse.ArgumentParser(
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description="Migrate old yabridge VST3 plugin instances in Ardour project files."
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)
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parser.add_argument("filename", type=str, help="The .ardour project file to migrate.")
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# As a safety measure we want to limit the file names we accept
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args = parser.parse_args()
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filename = args.filename
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file_stem, file_extension = os.path.splitext(filename)
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if file_extension.lower() != ".ardour":
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print("For safety reasons, only '*.ardour' files are accepted")
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exit(1)
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if file_stem.endswith("-migrated"):
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print("This project file has already been migrated to the new format")
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exit(1)
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migrated_filename = file_stem + "-migrated" + file_extension
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if os.path.exists(migrated_filename):
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print(
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f"'{migrated_filename}' already exists, back it up and move it elsewhere "
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"if you want to redo the migration"
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)
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exit(1)
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print(
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"\n".join(
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textwrap.wrap(
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f"This script will go through '{filename}' to migrate old yabridge VST3 plugin instances. "
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f"The output will be saved to '{migrated_filename}', but make sure to still create a backup of the original file in case something does go wrong. "
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f"For every VST3 plugin found you will be prompted with the question if you want to migrate it. "
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f"Answer 'yes' for all old yabridge VST3 plugin instances, and 'no' for any other VST3 plugin."
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f"Make sure to test whether the new project works immediately after migration.",
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width=80,
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break_on_hyphens=False,
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)
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)
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)
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print()
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# We'll search through the original file, and prompt to replace all VST3 class
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# IDs we come across. See `WineUID` in yabridge's source code for an
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# explanation of this conversion.
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with open(filename, "r", encoding="utf-8") as f_input, open(
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migrated_filename, "x", encoding="utf-8"
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) as f_output:
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migrated_file = []
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for line in f_input.readlines():
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# Sadly can't use the walrus operator here since old distros might
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# still ship with Python 3.6
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matches = ARDOUR_VST3_RE.search(line)
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if matches is not None:
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plugin_name = matches.group(1)
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wine_uid_start, wine_uid_end = matches.span(2)
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wine_uid = bytearray.fromhex(matches.group(2))
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converted_uid = bytearray.fromhex(matches.group(2))
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converted_uid[0] = wine_uid[3]
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converted_uid[1] = wine_uid[2]
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converted_uid[2] = wine_uid[1]
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converted_uid[3] = wine_uid[0]
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converted_uid[4] = wine_uid[5]
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converted_uid[5] = wine_uid[4]
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converted_uid[6] = wine_uid[7]
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converted_uid[7] = wine_uid[6]
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migrated_line = (
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line[:wine_uid_start]
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+ converted_uid.hex().upper()
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+ line[wine_uid_end:]
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)
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print(f"Found '{plugin_name}' with class ID '{wine_uid.hex().upper()}'")
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while True:
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answer = input("Should this plugin be migrated? [yes/no] ").lower()
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if answer == "yes":
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migrated_file.append(migrated_line)
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break
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elif answer == "no":
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migrated_file.append(line)
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break
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else:
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print("Please answer only 'yes' or 'no'")
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else:
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migrated_file.append(line)
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print(f"\nMigration successful, writing the results to '{migrated_filename}'")
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f_output.writelines(migrated_file)
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print(
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"\n".join(
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textwrap.wrap(
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f"You may have to manually clean Ardour's VST3 cache and rescan if it cannot find the plugins after migrating.",
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width=80,
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break_on_hyphens=False,
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)
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)
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)
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