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x86: af_volume: add SSE2-optimized s16 volume scaling

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This commit is contained in:
Justin Ruggles 2012-09-23 14:49:26 -04:00
parent b384e031da
commit f96f1e06a4
5 changed files with 102 additions and 0 deletions
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3
libavfilter/af_volume.c
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@ -213,6 +213,9 @@ static void volume_init(VolumeContext *vol)
vol->samples_align = 8;
break;
}
if (ARCH_X86)
ff_volume_init_x86(vol);
}
static int config_output(AVFilterLink *outlink)

2
libavfilter/af_volume.h
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@ -50,4 +50,6 @@ typedef struct VolumeContext {
int samples_align;
} VolumeContext;
void ff_volume_init_x86(VolumeContext *vol);
#endif /* AVFILTER_AF_VOLUME_H */

2
libavfilter/x86/Makefile
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@ -1,4 +1,6 @@
OBJS-$(CONFIG_GRADFUN_FILTER) += x86/gradfun.o
OBJS-$(CONFIG_VOLUME_FILTER) += x86/af_volume_init.o
OBJS-$(CONFIG_YADIF_FILTER) += x86/yadif.o
YASM-OBJS-$(CONFIG_HQDN3D_FILTER) += x86/hqdn3d.o
YASM-OBJS-$(CONFIG_VOLUME_FILTER) += x86/af_volume.o

56
libavfilter/x86/af_volume.asm Normal file
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@ -0,0 +1,56 @@
;*****************************************************************************
;* x86-optimized functions for volume filter
;* 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/x86inc.asm"
SECTION_RODATA 32
pw_1: times 8 dw 1
pw_128: times 8 dw 128
SECTION_TEXT
;------------------------------------------------------------------------------
; void ff_scale_samples_s16(uint8_t *dst, const uint8_t *src, int len,
; int volume)
;------------------------------------------------------------------------------
INIT_XMM sse2
cglobal scale_samples_s16, 4,4,4, dst, src, len, volume
movd m0, volumem
pshuflw m0, m0, 0
punpcklwd m0, [pw_1]
mova m1, [pw_128]
lea lenq, [lend*2-mmsize]
.loop:
; dst[i] = av_clip_int16((src[i] * volume + 128) >> 8);
mova m2, [srcq+lenq]
punpcklwd m3, m2, m1
punpckhwd m2, m1
pmaddwd m3, m0
pmaddwd m2, m0
psrad m3, 8
psrad m2, 8
packssdw m3, m2
mova [dstq+lenq], m3
sub lenq, mmsize
jge .loop
REP_RET

39
libavfilter/x86/af_volume_init.c Normal file
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@ -0,0 +1,39 @@
/*
* 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/samplefmt.h"
#include "libavutil/x86/cpu.h"
#include "libavfilter/af_volume.h"
void ff_scale_samples_s16_sse2(uint8_t *dst, const uint8_t *src, int len,
int volume);
void ff_volume_init_x86(VolumeContext *vol)
{
int mm_flags = av_get_cpu_flags();
enum AVSampleFormat sample_fmt = av_get_packed_sample_fmt(vol->sample_fmt);
if (sample_fmt == AV_SAMPLE_FMT_S16) {
if (EXTERNAL_SSE2(mm_flags) && vol->volume_i < 32768) {
vol->scale_samples = ff_scale_samples_s16_sse2;
vol->samples_align = 8;
}
}
}