[FFmpeg-soc] [PATCH 04/12] Put MDCT tables and temp buffers in a separate context.

[Justin Ruggles]

Renamed mdct512() to calc_mdct() since it can work for transform sizes other than 512.
Also 6% faster in function calc_mdct().
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 libavcodec/ac3enc.c |  121 ++++++++++++++++++++++++++++++++++++++-------------
 1 files changed, 90 insertions(+), 31 deletions(-)

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