[FFmpeg-devel] [PATCH v3] aacenc: add SIMD optimizations for abs_pow34 and quantization
Michael Niedermayer
michael at niedermayer.cc
Tue Oct 18 23:04:11 EEST 2016
On Tue, Oct 18, 2016 at 05:33:13PM +0100, Rostislav Pehlivanov wrote:
> On 18 October 2016 at 16:32, James Almer <jamrial at gmail.com> wrote:
>
> > On 10/18/2016 12:07 PM, Rostislav Pehlivanov wrote:
> > > diff --git a/libavcodec/aacenc.c b/libavcodec/aacenc.c
> > > index ee3cbf8..622f0ba 100644
> > > --- a/libavcodec/aacenc.c
> > > +++ b/libavcodec/aacenc.c
> > > @@ -1033,6 +1033,12 @@ static av_cold int aac_encode_init(AVCodecContext
> > *avctx)
> > > ff_lpc_init(&s->lpc, 2*avctx->frame_size, TNS_MAX_ORDER,
> > FF_LPC_TYPE_LEVINSON);
> > > s->random_state = 0x1f2e3d4c;
> > >
> > > + s->abs_pow34 = &abs_pow34_v;
> > > + s->quant_bands = &quantize_bands;
> >
> > No need for & in these.
> >
> > > +
> > > + if (ARCH_X86)
> > > + ff_aac_dsp_init_x86(s);
> > > +
> > > if (HAVE_MIPSDSP)
> > > ff_aac_coder_init_mips(s);
> >
> > [...]
> >
> > > diff --git a/libavcodec/x86/aacencdsp.asm b/libavcodec/x86/aacencdsp.asm
> > > new file mode 100644
> > > index 0000000..dd7b022
> > > --- /dev/null
> > > +++ b/libavcodec/x86/aacencdsp.asm
> > > @@ -0,0 +1,88 @@
> > > +;**********************************************************
> > ********************
> > > +;* SIMD optimized AAC encoder DSP functions
> > > +;*
> > > +;* Copyright (C) 2016 Rostislav Pehlivanov <atomnuker at gmail.com>
> > > +;*
> > > +;* This file is part of FFmpeg.
> > > +;*
> > > +;* FFmpeg is free software; you can redistribute it and/or
> > > +;* modify it under the terms of the GNU Lesser General Public
> > > +;* License as published by the Free Software Foundation; either
> > > +;* version 2.1 of the License, or (at your option) any later version.
> > > +;*
> > > +;* FFmpeg is distributed in the hope that it will be useful,
> > > +;* but WITHOUT ANY WARRANTY; without even the implied warranty of
> > > +;* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> > > +;* Lesser General Public License for more details.
> > > +;*
> > > +;* You should have received a copy of the GNU Lesser General Public
> > > +;* License along with FFmpeg; if not, write to the Free Software
> > > +;* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> > 02110-1301 USA
> > > +;**********************************************************
> > ********************
> > > +
> > > +%include "libavutil/x86/x86util.asm"
> > > +
> > > +SECTION_RODATA
> > > +
> > > +float_abs_mask: times 4 dd 0x7fffffff
> > > +
> > > +SECTION .text
> > > +
> > > +;*******************************************************************
> > > +;void ff_abs_pow34(float *out, const float *in, const int size);
> > > +;*******************************************************************
> > > +INIT_XMM sse
> > > +cglobal abs_pow34, 3, 3, 3, out, in, size
> > > + mova m2, [float_abs_mask]
> > > + shl sizeq, 2
> > > + add inq, sizeq
> > > + add outq, sizeq
> > > + neg sizeq
> > > +.loop:
> > > + movaps m0, [inq+sizeq]
> > > + andps m0, m2
> >
> > Remove the movaps and do
> >
> > andps m0, m2, [inq+sizeq]
> >
> > Instead. Sorry i didn't notice this last time.
> >
> > > + sqrtps m1, m0
> > > + mulps m0, m1
> > > + sqrtps m0, m0
> > > + mova [outq+sizeq], m0
> > > + add sizeq, mmsize
> > > + jl .loop
> > > + RET
> > > +
> > > +;*******************************************************************
> > > +;void ff_aac_quantize_bands(int *out, const float *in, const float
> > *scaled,
> > > +; int size, int is_signed, int maxval, const
> > float Q34,
> > > +; const float rounding)
> > > +;*******************************************************************
> > > +INIT_XMM sse2
> > > +cglobal aac_quantize_bands, 5, 5, 6, out, in, scaled, size, is_signed,
> > maxval, Q34, rounding
> > > +%if UNIX64 == 0
> > > + movss m0, Q34m
> > > + movss m1, roundingm
> > > + cvtsi2ss m3, maxvald
> > > +%else
> > > + cvtsi2ss m3, dword maxvalm
> > > +%endif
> >
> > The other way around. Unix64 is the one that has maxval on a reg regardless
> > of how you init the function, whereas win64 and any x86_32 target have it
> > on stack.
> >
> > > + shufps m0, m0, 0
> > > + shufps m1, m1, 0
> > > + shufps m3, m3, 0
> > > + shl is_signedd, 31
> > > + movd m4, is_signedd
> > > + shufps m4, m4, 0
> > > + shl sized, 2
> > > + add inq, sizeq
> > > + add outq, sizeq
> > > + add scaledq, sizeq
> > > + neg sizeq
> > > +.loop:
> > > + mulps m2, m0, [scaledq+sizeq]
> > > + addps m2, m1
> > > + minps m2, m3
> >
> > > + movaps m5, [inq+sizeq]
> > > + andps m5, m4
> >
> > Same as in abs_pow34, remove movaps and do
> >
> > andps m5, m4, [inq+sizeq]
> >
> > > + orps m2, m5
> > > + cvttps2dq m2, m2
> > > + mova [outq+sizeq], m2
> > > + add sizeq, mmsize
> > > + jl .loop
> > > + RET
> > > diff --git a/libavcodec/x86/aacencdsp_init.c b/libavcodec/x86/aacencdsp_
> > init.c
> > > new file mode 100644
> > > index 0000000..aefaa15
> > > --- /dev/null
> > > +++ b/libavcodec/x86/aacencdsp_init.c
> > > @@ -0,0 +1,43 @@
> > > +/*
> > > + * AAC encoder assembly optimizations
> > > + * Copyright (C) 2016 Rostislav Pehlivanov <atomnuker at gmail.com>
> > > + *
> > > + * This file is part of FFmpeg.
> > > + *
> > > + * FFmpeg is free software; you can redistribute it and/or
> > > + * modify it under the terms of the GNU Lesser General Public
> > > + * License as published by the Free Software Foundation; either
> > > + * version 2.1 of the License, or (at your option) any later version.
> > > + *
> > > + * FFmpeg is distributed in the hope that it will be useful,
> > > + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> > > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> > > + * Lesser General Public License for more details.
> > > + *
> > > + * You should have received a copy of the GNU Lesser General Public
> > > + * License along with FFmpeg; if not, write to the Free Software
> > > + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> > 02110-1301 USA
> > > + */
> > > +
> > > +#include "config.h"
> > > +
> > > +#include "libavutil/float_dsp.h"
> > > +#include "libavutil/x86/cpu.h"
> > > +#include "libavcodec/aacenc.h"
> > > +
> > > +void ff_abs_pow34_sse(float *out, const float *in, const int size);
> > > +
> > > +void ff_aac_quantize_bands_sse2(int *out, const float *in, const float
> > *scaled,
> > > + int size, int is_signed, int maxval,
> > const float Q34,
> > > + const float rounding);
> > > +
> > > +av_cold void ff_aac_dsp_init_x86(AACEncContext *s)
> > > +{
> > > + int cpu_flags = av_get_cpu_flags();
> > > +
> > > + if (EXTERNAL_SSE(cpu_flags))
> > > + s->abs_pow34 = &ff_abs_pow34_sse;
> > > +
> > > + if (EXTERNAL_SSE2(cpu_flags))
> > > + s->quant_bands = &ff_aac_quantize_bands_sse2;
> >
> > Same with these.
> >
> > Passes fate on mingw-w64 (x86_64) after fixing the maxval mixup above.
> > Crashes otherwise.
> >
> > _______________________________________________
> > ffmpeg-devel mailing list
> > ffmpeg-devel at ffmpeg.org
> > http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
> >
>
> Hopefully I didn't mess anything up and the attached patch is the last
> revision of it.
> aaccoder.c | 27 ++++++++-------
> aaccoder_trellis.h | 2 -
> aaccoder_twoloop.h | 2 -
> aacenc.c | 6 +++
> aacenc.h | 6 +++
> aacenc_is.c | 6 +--
> aacenc_ltp.c | 4 +-
> aacenc_pred.c | 6 +--
> aacenc_quantization.h | 4 +-
> aacenc_utils.h | 2 -
> x86/Makefile | 2 +
> x86/aacencdsp.asm | 86 ++++++++++++++++++++++++++++++++++++++++++++++++++
> x86/aacencdsp_init.c | 43 +++++++++++++++++++++++++
> 13 files changed, 170 insertions(+), 26 deletions(-)
> e9878e2480cd612e6852783003f47768f5ced052 0001-aacenc-add-SIMD-optimizations-for-abs_pow34-and-quan.patch
> From eb95cf5aeacdc7d191c5b7cf8df40a1e5306b733 Mon Sep 17 00:00:00 2001
> From: Rostislav Pehlivanov <atomnuker at gmail.com>
> Date: Sat, 8 Oct 2016 15:59:14 +0100
> Subject: [PATCH] aacenc: add SIMD optimizations for abs_pow34 and quantization
tested on x86 linux32/64 mingw32/64, arm qemu and mips qemu
all work now
[...]
--
Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
It is dangerous to be right in matters on which the established authorities
are wrong. -- Voltaire
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