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vf_interlace: Add SIMD for lowpass filter 

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
This commit is contained in:
Kieran Kunhya 2014-11-11 18:43:42 +00:00 committed by Luca Barbato
parent d16ec1b6db
commit 2e1704059a
5 changed files with 211 additions and 29 deletions
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59
libavfilter/interlace.h Normal file
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@ -0,0 +1,59 @@
/*
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 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 General Public License for more details.
*
* You should have received a copy of the GNU 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.
*/
/**
* @file
* progressive to interlaced content filter, inspired by heavy debugging of
* tinterlace filter.
*/
#ifndef AVFILTER_INTERLACE_H
#define AVFILTER_INTERLACE_H
#include "libavutil/common.h"
#include "libavutil/imgutils.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
enum ScanMode {
MODE_TFF = 0,
MODE_BFF = 1,
};
enum FieldType {
FIELD_UPPER = 0,
FIELD_LOWER = 1,
};
typedef struct InterlaceContext {
const AVClass *class;
enum ScanMode scan; // top or bottom field first scanning
int lowpass; // enable or disable low pass filterning
AVFrame *cur, *next; // the two frames from which the new one is obtained
int got_output; // signal an output frame is reday to request_frame()
void (*lowpass_line)(uint8_t *dstp, ptrdiff_t linesize, const uint8_t *srcp,
const uint8_t *srcp_above, const uint8_t *srcp_below);
} InterlaceContext;
void ff_interlace_init_x86(InterlaceContext *interlace);
#endif /* AVFILTER_INTERLACE_H */

57
libavfilter/vf_interlace.c
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@ -28,27 +28,10 @@
#include "formats.h"
#include "avfilter.h"
#include "interlace.h"
#include "internal.h"
#include "video.h"
enum ScanMode {
MODE_TFF = 0,
MODE_BFF = 1,
};
enum FieldType {
FIELD_UPPER = 0,
FIELD_LOWER = 1,
};
typedef struct InterlaceContext {
const AVClass *class;
enum ScanMode scan; // top or bottom field first scanning
int lowpass; // enable or disable low pass filterning
AVFrame *cur, *next; // the two frames from which the new one is obtained
int got_output; // signal an output frame is reday to request_frame()
} InterlaceContext;
#define OFFSET(x) offsetof(InterlaceContext, x)
#define V AV_OPT_FLAG_VIDEO_PARAM
static const AVOption options[] = {
@ -70,6 +53,19 @@ static const AVClass class = {
.version = LIBAVUTIL_VERSION_INT,
};
static void lowpass_line_c(uint8_t *dstp, ptrdiff_t linesize,
const uint8_t *srcp,
const uint8_t *srcp_above,
const uint8_t *srcp_below)
{
int i;
for (i = 0; i < linesize; i++) {
// this calculation is an integer representation of
// '0.5 * current + 0.25 * above + 0.25 * below'
// '1 +' is for rounding.
dstp[i] = (1 + srcp[i] + srcp[i] + srcp_above[i] + srcp_below[i]) >> 2;
}
}
static const enum AVPixelFormat formats_supported[] = {
AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P,
@ -116,23 +112,31 @@ static int config_out_props(AVFilterLink *outlink)
// half framerate
outlink->time_base.num *= 2;
if (s->lowpass) {
s->lowpass_line = lowpass_line_c;
if (ARCH_X86)
ff_interlace_init_x86(s);
}
av_log(ctx, AV_LOG_VERBOSE, "%s interlacing %s lowpass filter\n",
s->scan == MODE_TFF ? "tff" : "bff", (s->lowpass) ? "with" : "without");
return 0;
}
static void copy_picture_field(AVFrame *src_frame, AVFrame *dst_frame,
static void copy_picture_field(InterlaceContext *s,
AVFrame *src_frame, AVFrame *dst_frame,
AVFilterLink *inlink, enum FieldType field_type,
int lowpass)
{
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
int vsub = desc->log2_chroma_h;
int plane, i, j;
int plane, j;
for (plane = 0; plane < desc->nb_components; plane++) {
int lines = (plane == 1 || plane == 2) ? -(-inlink->h) >> vsub : inlink->h;
int linesize = av_image_get_linesize(inlink->format, inlink->w, plane);
ptrdiff_t linesize = av_image_get_linesize(inlink->format, inlink->w, plane);
uint8_t *dstp = dst_frame->data[plane];
const uint8_t *srcp = src_frame->data[plane];
@ -153,12 +157,7 @@ static void copy_picture_field(AVFrame *src_frame, AVFrame *dst_frame,
srcp_above = srcp; // there is no line above
if (j == 1)
srcp_below = srcp; // there is no line below
for (i = 0; i < linesize; i++) {
// this calculation is an integer representation of
// '0.5 * current + 0.25 * above + 0.25 * below'
// '1 +' is for rounding.
dstp[i] = (1 + srcp[i] + srcp[i] + srcp_above[i] + srcp_below[i]) >> 2;
}
s->lowpass_line(dstp, linesize, srcp, srcp_above, srcp_below);
dstp += dstp_linesize;
srcp += srcp_linesize;
}
@ -209,11 +208,11 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
out->pts /= 2; // adjust pts to new framerate
/* copy upper/lower field from cur */
copy_picture_field(s->cur, out, inlink, tff ? FIELD_UPPER : FIELD_LOWER, s->lowpass);
copy_picture_field(s, s->cur, out, inlink, tff ? FIELD_UPPER : FIELD_LOWER, s->lowpass);
av_frame_free(&s->cur);
/* copy lower/upper field from next */
copy_picture_field(s->next, out, inlink, tff ? FIELD_LOWER : FIELD_UPPER, s->lowpass);
copy_picture_field(s, s->next, out, inlink, tff ? FIELD_LOWER : FIELD_UPPER, s->lowpass);
av_frame_free(&s->next);
ret = ff_filter_frame(outlink, out);

2
libavfilter/x86/Makefile
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@ -1,9 +1,11 @@
OBJS-$(CONFIG_GRADFUN_FILTER) += x86/vf_gradfun_init.o
OBJS-$(CONFIG_HQDN3D_FILTER) += x86/vf_hqdn3d_init.o
OBJS-$(CONFIG_INTERLACE_FILTER) += x86/vf_interlace_init.o
OBJS-$(CONFIG_VOLUME_FILTER) += x86/af_volume_init.o
OBJS-$(CONFIG_YADIF_FILTER) += x86/vf_yadif_init.o
YASM-OBJS-$(CONFIG_GRADFUN_FILTER) += x86/vf_gradfun.o
YASM-OBJS-$(CONFIG_HQDN3D_FILTER) += x86/vf_hqdn3d.o
YASM-OBJS-$(CONFIG_INTERLACE_FILTER) += x86/vf_interlace.o
YASM-OBJS-$(CONFIG_VOLUME_FILTER) += x86/af_volume.o
YASM-OBJS-$(CONFIG_YADIF_FILTER) += x86/vf_yadif.o

75
libavfilter/x86/vf_interlace.asm Normal file
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@ -0,0 +1,75 @@
;*****************************************************************************
;* x86-optimized functions for interlace filter
;*
;* Copyright (C) 2014 Kieran Kunhya <kierank@obe.tv>
;*
;* This file is part of Libav.
;*
;* Libav is free software; you can redistribute it and/or modify
;* it under the terms of the GNU General Public License as published by
;* the Free Software Foundation; either version 2 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 General Public License for more details.
;*
;* You should have received a copy of the GNU 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
SECTION .text
%macro LOWPASS_LINE 0
cglobal lowpass_line, 5, 5, 7
add r0, r1
add r2, r1
add r3, r1
add r4, r1
neg r1
pxor m6, m6
.loop
mova m0, [r2+r1]
punpcklbw m1, m0, m6
punpckhbw m0, m6
paddw m0, m0
paddw m1, m1
mova m2, [r3+r1]
punpcklbw m3, m2, m6
punpckhbw m2, m6
mova m4, [r4+r1]
punpcklbw m5, m4, m6
punpckhbw m4, m6
paddw m1, m3
pavgw m1, m5
paddw m0, m2
pavgw m0, m4
psrlw m0, 1
psrlw m1, 1
packuswb m1, m0
mova [r0+r1], m1
add r1, mmsize
jl .loop
REP_RET
%endmacro
INIT_XMM sse2
LOWPASS_LINE
INIT_XMM avx
LOWPASS_LINE

47
libavfilter/x86/vf_interlace_init.c Normal file
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@ -0,0 +1,47 @@
/*
* Copyright (C) 2014 Kieran Kunhya <kierank@obe.tv>
*
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 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 General Public License for more details.
*
* You should have received a copy of the GNU 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/attributes.h"
#include "libavutil/cpu.h"
#include "libavutil/internal.h"
#include "libavutil/mem.h"
#include "libavutil/x86/asm.h"
#include "libavutil/x86/cpu.h"
#include "libavfilter/interlace.h"
void ff_lowpass_line_sse2(uint8_t *dstp, ptrdiff_t linesize,
const uint8_t *srcp,
const uint8_t *srcp_above,
const uint8_t *srcp_below);
void ff_lowpass_line_avx (uint8_t *dstp, ptrdiff_t linesize,
const uint8_t *srcp,
const uint8_t *srcp_above,
const uint8_t *srcp_below);
av_cold void ff_interlace_init_x86(InterlaceContext *s)
{
int cpu_flags = av_get_cpu_flags();
if (EXTERNAL_SSE2(cpu_flags))
s->lowpass_line = ff_lowpass_line_sse2;
if (EXTERNAL_AVX(cpu_flags))
s->lowpass_line = ff_lowpass_line_avx;
}