mirror of
https://github.com/yt-dlp/yt-dlp.git
synced 2024-11-04 23:43:20 +00:00
174 lines
4.6 KiB
Python
174 lines
4.6 KiB
Python
"""No longer used and new code should not use. Exists only for API compat."""
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import platform
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import struct
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import sys
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import urllib.parse
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import zlib
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from ._utils import decode_base_n, preferredencoding
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from .traversal import traverse_obj
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from ..dependencies import certifi, websockets
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has_certifi = bool(certifi)
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has_websockets = bool(websockets)
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def load_plugins(name, suffix, namespace):
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from ..plugins import load_plugins
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ret = load_plugins(name, suffix)
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namespace.update(ret)
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return ret
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def traverse_dict(dictn, keys, casesense=True):
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return traverse_obj(dictn, keys, casesense=casesense, is_user_input=True, traverse_string=True)
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def decode_base(value, digits):
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return decode_base_n(value, table=digits)
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def platform_name():
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""" Returns the platform name as a str """
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return platform.platform()
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def get_subprocess_encoding():
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if sys.platform == 'win32' and sys.getwindowsversion()[0] >= 5:
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# For subprocess calls, encode with locale encoding
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# Refer to http://stackoverflow.com/a/9951851/35070
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encoding = preferredencoding()
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else:
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encoding = sys.getfilesystemencoding()
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if encoding is None:
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encoding = 'utf-8'
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return encoding
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# UNUSED
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# Based on png2str() written by @gdkchan and improved by @yokrysty
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# Originally posted at https://github.com/ytdl-org/youtube-dl/issues/9706
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def decode_png(png_data):
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# Reference: https://www.w3.org/TR/PNG/
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header = png_data[8:]
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if png_data[:8] != b'\x89PNG\x0d\x0a\x1a\x0a' or header[4:8] != b'IHDR':
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raise OSError('Not a valid PNG file.')
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int_map = {1: '>B', 2: '>H', 4: '>I'}
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unpack_integer = lambda x: struct.unpack(int_map[len(x)], x)[0]
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chunks = []
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while header:
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length = unpack_integer(header[:4])
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header = header[4:]
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chunk_type = header[:4]
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header = header[4:]
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chunk_data = header[:length]
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header = header[length:]
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header = header[4:] # Skip CRC
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chunks.append({
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'type': chunk_type,
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'length': length,
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'data': chunk_data
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})
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ihdr = chunks[0]['data']
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width = unpack_integer(ihdr[:4])
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height = unpack_integer(ihdr[4:8])
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idat = b''
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for chunk in chunks:
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if chunk['type'] == b'IDAT':
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idat += chunk['data']
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if not idat:
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raise OSError('Unable to read PNG data.')
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decompressed_data = bytearray(zlib.decompress(idat))
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stride = width * 3
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pixels = []
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def _get_pixel(idx):
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x = idx % stride
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y = idx // stride
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return pixels[y][x]
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for y in range(height):
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basePos = y * (1 + stride)
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filter_type = decompressed_data[basePos]
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current_row = []
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pixels.append(current_row)
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for x in range(stride):
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color = decompressed_data[1 + basePos + x]
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basex = y * stride + x
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left = 0
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up = 0
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if x > 2:
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left = _get_pixel(basex - 3)
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if y > 0:
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up = _get_pixel(basex - stride)
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if filter_type == 1: # Sub
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color = (color + left) & 0xff
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elif filter_type == 2: # Up
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color = (color + up) & 0xff
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elif filter_type == 3: # Average
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color = (color + ((left + up) >> 1)) & 0xff
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elif filter_type == 4: # Paeth
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a = left
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b = up
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c = 0
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if x > 2 and y > 0:
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c = _get_pixel(basex - stride - 3)
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p = a + b - c
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pa = abs(p - a)
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pb = abs(p - b)
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pc = abs(p - c)
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if pa <= pb and pa <= pc:
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color = (color + a) & 0xff
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elif pb <= pc:
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color = (color + b) & 0xff
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else:
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color = (color + c) & 0xff
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current_row.append(color)
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return width, height, pixels
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def register_socks_protocols():
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# "Register" SOCKS protocols
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# In Python < 2.6.5, urlsplit() suffers from bug https://bugs.python.org/issue7904
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# URLs with protocols not in urlparse.uses_netloc are not handled correctly
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for scheme in ('socks', 'socks4', 'socks4a', 'socks5'):
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if scheme not in urllib.parse.uses_netloc:
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urllib.parse.uses_netloc.append(scheme)
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def handle_youtubedl_headers(headers):
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filtered_headers = headers
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if 'Youtubedl-no-compression' in filtered_headers:
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filtered_headers = {k: v for k, v in filtered_headers.items() if k.lower() != 'accept-encoding'}
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del filtered_headers['Youtubedl-no-compression']
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return filtered_headers
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