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x86: lavr: add SSE2 quantize() for dithering

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This commit is contained in:
Justin Ruggles 2012-10-31 15:40:12 -04:00
parent 142c39097c
commit 1fb8f6a44f
5 changed files with 102 additions and 0 deletions
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3
libavresample/dither.c
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@ -336,6 +336,9 @@ static void dither_init(DitherDSPContext *ddsp,
ddsp->dither_int_to_float = dither_int_to_float_rectangular_c;
else
ddsp->dither_int_to_float = dither_int_to_float_triangular_c;
if (ARCH_X86)
ff_dither_init_x86(ddsp, method);
}
DitherContext *ff_dither_alloc(AVAudioResampleContext *avr,

5
libavresample/dither.h
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@ -85,4 +85,9 @@ void ff_dither_free(DitherContext **c);
*/
int ff_convert_dither(DitherContext *c, AudioData *dst, AudioData *src);
/* arch-specific initialization functions */
void ff_dither_init_x86(DitherDSPContext *ddsp,
enum AVResampleDitherMethod method);
#endif /* AVRESAMPLE_DITHER_H */

2
libavresample/x86/Makefile
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@ -1,5 +1,7 @@
OBJS += x86/audio_convert_init.o \
x86/audio_mix_init.o \
x86/dither_init.o \
YASM-OBJS += x86/audio_convert.o \
x86/audio_mix.o \
x86/dither.o \

53
libavresample/x86/dither.asm Normal file
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@ -0,0 +1,53 @@
;******************************************************************************
;* x86 optimized dithering format conversion
;* Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com>
;*
;* This file is part of Libav.
;*
;* Libav 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.
;*
;* Libav 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 Libav; 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 32
pf_s16_scale: times 4 dd 32753.0
SECTION_TEXT
;------------------------------------------------------------------------------
; void ff_quantize(int16_t *dst, float *src, float *dither, int len);
;------------------------------------------------------------------------------
INIT_XMM sse2
cglobal quantize, 4,4,3, dst, src, dither, len
lea lenq, [2*lend]
add dstq, lenq
lea srcq, [srcq+2*lenq]
lea ditherq, [ditherq+2*lenq]
neg lenq
mova m2, [pf_s16_scale]
.loop:
mulps m0, m2, [srcq+2*lenq]
mulps m1, m2, [srcq+2*lenq+mmsize]
addps m0, [ditherq+2*lenq]
addps m1, [ditherq+2*lenq+mmsize]
cvtps2dq m0, m0
cvtps2dq m1, m1
packssdw m0, m1
mova [dstq+lenq], m0
add lenq, mmsize
jl .loop
REP_RET

39
libavresample/x86/dither_init.c Normal file
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@ -0,0 +1,39 @@
/*
* Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com>
*
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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 Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include "libavutil/cpu.h"
#include "libavutil/x86/cpu.h"
#include "libavresample/dither.h"
extern void ff_quantize_sse2(int16_t *dst, const float *src, float *dither,
int len);
av_cold void ff_dither_init_x86(DitherDSPContext *ddsp,
enum AVResampleDitherMethod method)
{
int mm_flags = av_get_cpu_flags();
if (EXTERNAL_SSE2(mm_flags)) {
ddsp->quantize = ff_quantize_sse2;
ddsp->ptr_align = 16;
ddsp->samples_align = 8;
}
}