[FFmpeg-devel] [PATCH 06/11] lavu/aes: add x86 AESNI optimizations

[Michael Niedermayer]

On Mon, Oct 19, 2015 at 04:31:23AM -0500, Rodger Combs wrote:
> crypto_bench comparison for AES-128-EBC:
> 
> lavu_aesni AES-128-ECB  size: 1048576  runs:   1024  time:    0.596 +- 0.081
> lavu_c     AES-128-ECB  size: 1048576  runs:   1024  time:   17.007 +- 2.131
> crypto     AES-128-ECB  size: 1048576  runs:   1024  time:    0.612 +- 1.857
> gcrypt     AES-128-ECB  size: 1048576  runs:   1024  time:    1.123 +- 0.224
> tomcrypt   AES-128-ECB  size: 1048576  runs:   1024  time:    9.038 +- 0.790
> 
> Improved-By: Henrik Gramner <henrik at gramner.com>
> ---
>  libavutil/aes.c          |  4 +++
>  libavutil/aes_internal.h |  2 ++
>  libavutil/x86/Makefile   |  4 ++-
>  libavutil/x86/aes.asm    | 91 ++++++++++++++++++++++++++++++++++++++++++++++++
>  libavutil/x86/aes_init.c | 37 ++++++++++++++++++++
>  5 files changed, 137 insertions(+), 1 deletion(-)
>  create mode 100644 libavutil/x86/aes.asm
>  create mode 100644 libavutil/x86/aes_init.c

not sure its this patch or another in the series (as i tested with
all applied)
but

./ffmpeg -i matrixbench_mpeg2.mpg -encryption_key 0123456789abcdef0011223344556677  -encryption_iv aabbccddeeff11335577999876542222  crypto:file-crypt.nut
./ffmpeg -decryption_key 0123456789abcdef0011223344556677 -decryption_iv aabbccddeeff11335577999876542222 -i crypto:file-crypt.nut
[nut @ 0x2179960] stream header 1 checksum mismatch
[nut @ 0x2179960] Not all stream headers found.
crypto:file-crypt.nut: Invalid data found when processing input

This works fine if an old version of ffmpeg is used for decryption

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Republics decline into democracies and democracies degenerate into
despotisms. -- Aristotle
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