[FFmpeg-devel] [PATCH v2] aacenc: add SIMD optimizations for abs_pow34 and quantization

[Michael Niedermayer]

On Sat, Oct 08, 2016 at 06:42:28PM +0100, Rostislav Pehlivanov wrote:
> Performance improvements:
> 
> quant_bands:
> with:     681 decicycles in quant_bands, 8388453 runs,    155 skips
> without: 1190 decicycles in quant_bands, 8388386 runs,    222 skips
> Around 42% for the function
> 
> Twoloop coder:
> 
> abs_pow34:
> with/without: 7.82s/8.17s
> Around 4% for the entire encoder
> 
> Both:
> with/without: 7.15s/8.17s
> Around 12% for the entire encoder
> 
> Fast coder:
> 
> abs_pow34:
> with/without: 3.40s/3.77s
> Around 10% for the entire encoder
> 
> Both:
> with/without: 3.02s/3.77s
> Around 20% faster for the entire encoder
> 
> Signed-off-by: Rostislav Pehlivanov <atomnuker at gmail.com>
> ---
>  libavcodec/aaccoder.c            |  22 ++++----
>  libavcodec/aaccoder_trellis.h    |   2 +-
>  libavcodec/aaccoder_twoloop.h    |   2 +-
>  libavcodec/aacenc.c              |   4 ++
>  libavcodec/aacenc.h              |   6 +++
>  libavcodec/aacenc_is.c           |   6 +--
>  libavcodec/aacenc_ltp.c          |   4 +-
>  libavcodec/aacenc_pred.c         |   6 +--
>  libavcodec/aacenc_quantization.h |   4 +-
>  libavcodec/aacenc_utils.h        |   4 +-
>  libavcodec/x86/Makefile          |   2 +
>  libavcodec/x86/aacencdsp.asm     | 108 +++++++++++++++++++++++++++++++++++++++
>  libavcodec/x86/aacencdsp_init.c  |  42 +++++++++++++++
>  13 files changed, 187 insertions(+), 25 deletions(-)
>  create mode 100644 libavcodec/x86/aacencdsp.asm
>  create mode 100644 libavcodec/x86/aacencdsp_init.c

libavcodec/x86/aacencdsp.asm:67: error: expression syntax error
libavcodec/x86/aacencdsp.asm:79: warning: (RUN_AVX_INSTR:22) use of ``movd'' sse2 instruction in sse function: ff_aac_quantize_bands_sse
libavcodec/x86/aacencdsp.asm:99: warning: (RUN_AVX_INSTR:22) use of ``pand'' sse2 instruction in sse function: ff_aac_quantize_bands_sse
libavcodec/x86/aacencdsp.asm:103: warning: (RUN_AVX_INSTR:20) use of ``cvttps2dq'' sse2 instruction in sse function: ff_aac_quantize_bands_sse

yasm 1.2.0

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

Breaking DRM is a little like attempting to break through a door even
though the window is wide open and the only thing in the house is a bunch
of things you dont want and which you would get tomorrow for free anyway
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