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[downloader/f4m] Minor cleanup
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2c322cc5d6
commit
f14f2a6d79
@ -191,6 +191,10 @@ def write_unsigned_int(stream, val):
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stream.write(struct_pack('!I', val))
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def write_unsigned_int_24(stream, val):
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stream.write(struct_pack('!I', val)[1:])
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def write_flv_header(stream):
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"""Writes the FLV header to stream"""
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# FLV header
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@ -202,13 +206,12 @@ def write_flv_header(stream):
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def write_metadata_tag(stream, metadata):
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"""Writes optional metadata tag to stream"""
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SCRIPT_TAG = b'\x12'
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FLV_TAG_HEADER_LEN = 11
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if metadata:
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# Script data
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stream.write(b'\x12')
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# Size of the metadata with 3 bytes
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stream.write(struct_pack('!L', len(metadata))[1:])
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stream.write(SCRIPT_TAG)
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write_unsigned_int_24(stream, len(metadata))
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stream.write(b'\x00\x00\x00\x00\x00\x00\x00')
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stream.write(metadata)
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write_unsigned_int(stream, FLV_TAG_HEADER_LEN + len(metadata))
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