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[downloader/f4m] Minor cleanup

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This commit is contained in:
Antti Ajanki 2015-01-05 20:30:40 +02:00
parent 2c322cc5d6
commit f14f2a6d79
1 changed files with 7 additions and 4 deletions
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11
youtube_dl/downloader/f4m.py
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@ -191,6 +191,10 @@ def write_unsigned_int(stream, val):
stream.write(struct_pack('!I', val))
def write_unsigned_int_24(stream, val):
stream.write(struct_pack('!I', val)[1:])
def write_flv_header(stream):
"""Writes the FLV header to stream"""
# FLV header
@ -202,13 +206,12 @@ def write_flv_header(stream):
def write_metadata_tag(stream, metadata):
"""Writes optional metadata tag to stream"""
SCRIPT_TAG = b'\x12'
FLV_TAG_HEADER_LEN = 11
if metadata:
# Script data
stream.write(b'\x12')
# Size of the metadata with 3 bytes
stream.write(struct_pack('!L', len(metadata))[1:])
stream.write(SCRIPT_TAG)
write_unsigned_int_24(stream, len(metadata))
stream.write(b'\x00\x00\x00\x00\x00\x00\x00')
stream.write(metadata)
write_unsigned_int(stream, FLV_TAG_HEADER_LEN + len(metadata))