diff options
Diffstat (limited to 'scripts/zstd.py')
-rw-r--r-- | scripts/zstd.py | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/scripts/zstd.py b/scripts/zstd.py new file mode 100644 index 0000000..f85e7da --- /dev/null +++ b/scripts/zstd.py @@ -0,0 +1,41 @@ +import subprocess +from rcc_format import * + +def zstd(filelist, args): + if args.train is not None: + train(filelist, args.train, args.binary, args.dsize) + return + + write_header(args.output, args.namespace) + + for f in filelist: + with open(f.path, 'rb') as contents: + write_item(args.output, f.variable, compress(contents, args.binary, args.level, dictionary=args.dict)) + + write_entries(args.output, filelist) + if args.dict is not None: + write_item(args.output, 'dict', args.dict.read()) + print("constexpr auto dictionary = std::span(dict, dict_len);", file=args.output) + + print("constexpr auto compression = embed::Zstd;", file=args.output) + + write_footer(args.output, args.namespace) + +def train(filelist, output, zstd_bin, maxdict): + cmd = [ zstd_bin, '--train', '--maxdict=' + str(maxdict), '-o', output.name ] + + for f in filelist: + cmd.append(f.path) + + subprocess.run(cmd) + +def compress(file, zstd_bin, level, dictionary=None): + cmd = [ zstd_bin, '--compress', '--stdout', '-' + str(level) ] + + if dictionary is not None: + cmd.append('-D') + cmd.append(dictionary.name) + + cmd.append(file.name) + return subprocess.run(cmd, capture_output=True).stdout + |