piper/src/python_run/piper/__main__.py

import argparse
import logging
import sys
import time
import wave
from pathlib import Path
from typing import Any, Dict

from . import PiperVoice
from .download import ensure_voice_exists, find_voice, get_voices

_FILE = Path(__file__)
_DIR = _FILE.parent
_LOGGER = logging.getLogger(_FILE.stem)


def main() -> None:
    parser = argparse.ArgumentParser()
    parser.add_argument("-m", "--model", required=True, help="Path to Onnx model file")
    parser.add_argument("-c", "--config", help="Path to model config file")
    parser.add_argument(
        "-f",
        "--output-file",
        "--output_file",
        help="Path to output WAV file (default: stdout)",
    )
    parser.add_argument(
        "-d",
        "--output-dir",
        "--output_dir",
        help="Path to output directory (default: cwd)",
    )
    parser.add_argument(
        "--output-raw",
        "--output_raw",
        action="store_true",
        help="Stream raw audio to stdout",
    )
    #
    parser.add_argument("-s", "--speaker", type=int, help="Id of speaker (default: 0)")
    parser.add_argument(
        "--length-scale", "--length_scale", type=float, help="Phoneme length"
    )
    parser.add_argument(
        "--noise-scale", "--noise_scale", type=float, help="Generator noise"
    )
    parser.add_argument(
        "--noise-w", "--noise_w", type=float, help="Phoneme width noise"
    )
    #
    parser.add_argument("--cuda", action="store_true", help="Use GPU")
    #
    parser.add_argument(
        "--sentence-silence",
        "--sentence_silence",
        type=float,
        default=0.0,
        help="Seconds of silence after each sentence",
    )
    #
    parser.add_argument(
        "--data-dir",
        "--data_dir",
        action="append",
        default=[str(Path.cwd())],
        help="Data directory to check for downloaded models (default: current directory)",
    )
    parser.add_argument(
        "--download-dir",
        "--download_dir",
        help="Directory to download voices into (default: first data dir)",
    )
    #
    parser.add_argument(
        "--update-voices",
        action="store_true",
        help="Download latest voices.json during startup",
    )
    #
    parser.add_argument(
        "--debug", action="store_true", help="Print DEBUG messages to console"
    )
    args = parser.parse_args()
    logging.basicConfig(level=logging.DEBUG if args.debug else logging.INFO)
    _LOGGER.debug(args)

    if not args.download_dir:
        # Download to first data directory by default
        args.download_dir = args.data_dir[0]

    # Download voice if file doesn't exist
    model_path = Path(args.model)
    if not model_path.exists():
        # Load voice info
        voices_info = get_voices(args.download_dir, update_voices=args.update_voices)

        # Resolve aliases for backwards compatibility with old voice names
        aliases_info: Dict[str, Any] = {}
        for voice_info in voices_info.values():
            for voice_alias in voice_info.get("aliases", []):
                aliases_info[voice_alias] = {"_is_alias": True, **voice_info}

        voices_info.update(aliases_info)
        ensure_voice_exists(args.model, args.data_dir, args.download_dir, voices_info)
        args.model, args.config = find_voice(args.model, args.data_dir)

    # Load voice
    voice = PiperVoice.load(args.model, config_path=args.config, use_cuda=args.cuda)
    synthesize_args = {
        "speaker_id": args.speaker,
        "length_scale": args.length_scale,
        "noise_scale": args.noise_scale,
        "noise_w": args.noise_w,
        "sentence_silence": args.sentence_silence,
    }

    if args.output_raw:
        # Read line-by-line
        for line in sys.stdin:
            line = line.strip()
            if not line:
                continue

            # Write raw audio to stdout as its produced
            audio_stream = voice.synthesize_stream_raw(line, **synthesize_args)
            for audio_bytes in audio_stream:
                sys.stdout.buffer.write(audio_bytes)
                sys.stdout.buffer.flush()
    elif args.output_dir:
        output_dir = Path(args.output_dir)
        output_dir.mkdir(parents=True, exist_ok=True)

        # Read line-by-line
        for line in sys.stdin:
            line = line.strip()
            if not line:
                continue

            wav_path = output_dir / f"{time.monotonic_ns()}.wav"
            with wave.open(str(wav_path), "wb") as wav_file:
                voice.synthesize(line, wav_file, **synthesize_args)

            _LOGGER.info("Wrote %s", wav_path)
    else:
        # Read entire input
        text = sys.stdin.read()

        if (not args.output_file) or (args.output_file == "-"):
            # Write to stdout
            with wave.open(sys.stdout.buffer, "wb") as wav_file:
                voice.synthesize(text, wav_file, **synthesize_args)
        else:
            # Write to file
            with wave.open(args.output_file, "wb") as wav_file:
                voice.synthesize(text, wav_file, **synthesize_args)


if __name__ == "__main__":
    main()