Tulir Asokan
132 lines
6.1 KiB
Python
132 lines
6.1 KiB
Python
# mautrix-telegram - A Matrix-Telegram puppeting bridge
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# Telegram lottie sticker converter
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# Copyright (C) 2019 Randall Eramde Lawrence
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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from typing import Dict, Callable, Awaitable, Optional, Tuple, Any
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import asyncio.subprocess
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import logging
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import shutil
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import os.path
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import tempfile
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from attr import dataclass
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log: logging.Logger = logging.getLogger("mau.util.tgs")
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@dataclass
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class ConvertedSticker:
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mime: str
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data: bytes
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thumbnail_mime: Optional[str] = None
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thumbnail_data: Optional[bytes] = None
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width: int = 0
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height: int = 0
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Converter = Callable[[bytes, int, int, Any], Awaitable[ConvertedSticker]]
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converters: Dict[str, Converter] = {}
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def abswhich(program: Optional[str]) -> Optional[str]:
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path = shutil.which(program)
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return os.path.abspath(path) if path else None
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lottieconverter = abswhich("lottieconverter")
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ffmpeg = abswhich("ffmpeg")
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if lottieconverter:
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async def tgs_to_png(file: bytes, width: int, height: int, **_: Any) -> ConvertedSticker:
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frame = 1
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proc = await asyncio.create_subprocess_exec(lottieconverter, "-", "-", "png",
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f"{width}x{height}", str(frame),
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stdout=asyncio.subprocess.PIPE,
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stdin=asyncio.subprocess.PIPE)
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stdout, stderr = await proc.communicate(file)
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if proc.returncode == 0:
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return ConvertedSticker("image/png", stdout)
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else:
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log.error("lottieconverter error: " + (stderr.decode("utf-8") if stderr is not None
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else f"unknown ({proc.returncode})"))
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return ConvertedSticker("application/gzip", file)
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async def tgs_to_gif(file: bytes, width: int, height: int, background: str = "202020",
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**_: Any) -> ConvertedSticker:
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proc = await asyncio.create_subprocess_exec(lottieconverter, "-", "-", "gif",
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f"{width}x{height}", f"0x{background}",
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stdout=asyncio.subprocess.PIPE,
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stdin=asyncio.subprocess.PIPE)
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stdout, stderr = await proc.communicate(file)
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if proc.returncode == 0:
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return ConvertedSticker("image/gif", stdout)
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else:
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log.error("lottieconverter error: " + (stderr.decode("utf-8") if stderr is not None
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else f"unknown ({proc.returncode})"))
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return ConvertedSticker("application/gzip", file)
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converters["png"] = tgs_to_png
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converters["gif"] = tgs_to_gif
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if lottieconverter and ffmpeg:
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async def tgs_to_webm(file: bytes, width: int, height: int, fps: int = 30,
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**_: Any) -> ConvertedSticker:
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with tempfile.TemporaryDirectory(prefix="tgs_") as tmpdir:
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file_template = tmpdir + "/out_"
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proc = await asyncio.create_subprocess_exec(lottieconverter, "-", file_template,
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"pngs", f"{width}x{height}", str(fps),
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stdout=asyncio.subprocess.PIPE,
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stdin=asyncio.subprocess.PIPE)
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_, stderr = await proc.communicate(file)
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if proc.returncode == 0:
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with open(f"{file_template}00.png", "rb") as first_frame_file:
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first_frame_data = first_frame_file.read()
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proc = await asyncio.create_subprocess_exec(ffmpeg, "-hide_banner", "-loglevel",
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"error", "-framerate", str(fps),
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"-pattern_type", "glob", "-i",
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file_template + "*.png",
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"-c:v", "libvpx-vp9", "-pix_fmt",
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"yuva420p", "-f", "webm", "-",
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stdout=asyncio.subprocess.PIPE,
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stdin=asyncio.subprocess.PIPE)
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stdout, stderr = await proc.communicate()
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if proc.returncode == 0:
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return ConvertedSticker("video/webm", stdout, "image/png", first_frame_data)
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else:
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log.error("ffmpeg error: " + (stderr.decode("utf-8") if stderr is not None
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else f"unknown ({proc.returncode})"))
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else:
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log.error("lottieconverter error: " + (stderr.decode("utf-8") if stderr is not None
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else f"unknown ({proc.returncode})"))
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return ConvertedSticker("application/gzip", file)
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converters["webm"] = tgs_to_webm
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async def convert_tgs_to(file: bytes, convert_to: str, width: int, height: int, **kwargs: Any
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) -> ConvertedSticker:
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if convert_to in converters:
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converter = converters[convert_to]
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converted = await converter(file, width, height, **kwargs)
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converted.width = width
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converted.height = height
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return converted
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elif convert_to != "disable":
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log.warning(f"Unable to convert animated sticker, type {convert_to} not supported")
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return ConvertedSticker("application/gzip", file)
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