48 lines
1.5 KiB
Python
48 lines
1.5 KiB
Python
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from io import BytesIO
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from typing import Optional, Union, BinaryIO, List
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from chipchune._util import read_short, read_int, read_str
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from .data_types import SampleMeta
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from .enums import _FurSampleType
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FILE_MAGIC_STR = b'SMP2'
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class FurnaceSample:
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def __init__(self) -> None:
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self.meta: SampleMeta = SampleMeta()
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"""
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Sample metadata.
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"""
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self.data: bytearray = b''
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"""
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Sample data.
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"""
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def load_from_stream(self, stream: BinaryIO) -> None:
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"""
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Load a sample from an **uncompressed** stream.
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:param stream: File-like object containing the uncompressed wavetable.
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"""
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if stream.read(len(FILE_MAGIC_STR)) != FILE_MAGIC_STR:
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raise ValueError('Bad magic value for a wavetable file')
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blk_size = read_int(stream)
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if blk_size > 0:
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smp_data = BytesIO(stream.read(blk_size))
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else:
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smp_data = stream
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self.meta.name = read_str(smp_data)
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self.meta.length = read_int(smp_data)
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read_int(smp_data) # compatablity rate
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self.meta.sample_rate = read_int(smp_data)
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self.meta.depth = int(smp_data.read(1)[0])
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smp_data.read(1) # loop direction
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smp_data.read(1) # flags
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smp_data.read(1) # flags 2
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self.meta.loop_start = read_int(smp_data)
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self.meta.loop_end = read_int(smp_data)
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smp_data.read(16) # sample presence bitfields
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self.data = smp_data.read(self.meta.length)
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