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36 lines
1.1 KiB
Python
36 lines
1.1 KiB
Python
from typing import AsyncGenerator
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async def glb_sequence_to_glbs(glb_sequence: AsyncGenerator[bytes, None], count: int = -1) -> AsyncGenerator[bytes, None]:
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"""Converts a sequence of GLB files into a single GLBS file.
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This is a streaming response in the custom GLBS format which consists of the "GLBS" magic text followed by
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a count of GLB files (0xffffffff if unknown) and a sequence of GLB files, each with a length prefix. All numbers are
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4-byte little-endian unsigned integers."""
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# Write the magic text
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yield b'GLBS'
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# Write the count
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yield count.to_bytes(4, 'little')
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# Write the GLB files
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async for glb in glb_sequence:
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# Write the length prefix
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yield len(glb).to_bytes(4, 'little')
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# Write the GLB file
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yield glb
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if __name__ == '__main__':
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import asyncio
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async def test_glb_sequence_to_glbs():
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async def glb_sequence():
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yield b'glb00001'
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yield b'glb2'
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async for chunk in glb_sequence_to_glbs(glb_sequence(), 2):
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print(chunk)
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asyncio.run(test_glb_sequence_to_glbs()) |