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imgutils: add a function for copying image data from GPU mapped memory 

See https://software.intel.com/en-us/articles/copying-accelerated-video-decode-frame-buffers
This commit is contained in:
Anton Khirnov 2016-08-23 21:46:50 +02:00
parent 24da430324
commit d7bc52bf45
8 changed files with 219 additions and 14 deletions
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4
doc/APIchanges
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@ -13,6 +13,10 @@ libavutil: 2015-08-28
API changes, most recent first:
2016-08-24 - xxxxxxx - lavu 55.21.0 - imgutils.h
Add av_image_copy_uc_from(), a version of av_image_copy() for copying
from GPU mapped memory.
2016-xx-xx - xxxxxxx - lavc 59.26.0 - vaapi.h
Deprecate struct vaapi_context and the vaapi.h installed header.
Callers should set AVCodecContext.hw_frames_ctx instead.

75
libavutil/imgutils.c
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@ -23,6 +23,7 @@
#include "common.h"
#include "imgutils.h"
#include "imgutils_internal.h"
#include "internal.h"
#include "intreadwrite.h"
#include "log.h"
@ -252,9 +253,9 @@ int av_image_check_sar(unsigned int w, unsigned int h, AVRational sar)
return AVERROR(EINVAL);
}
void av_image_copy_plane(uint8_t *dst, int dst_linesize,
const uint8_t *src, int src_linesize,
int bytewidth, int height)
static void image_copy_plane(uint8_t *dst, ptrdiff_t dst_linesize,
const uint8_t *src, ptrdiff_t src_linesize,
ptrdiff_t bytewidth, int height)
{
if (!dst || !src)
return;
@ -265,9 +266,33 @@ void av_image_copy_plane(uint8_t *dst, int dst_linesize,
}
}
void av_image_copy(uint8_t *dst_data[4], int dst_linesizes[4],
const uint8_t *src_data[4], const int src_linesizes[4],
enum AVPixelFormat pix_fmt, int width, int height)
static void image_copy_plane_uc_from(uint8_t *dst, ptrdiff_t dst_linesize,
const uint8_t *src, ptrdiff_t src_linesize,
ptrdiff_t bytewidth, int height)
{
int ret = -1;
#if ARCH_X86
ret = ff_image_copy_plane_uc_from_x86(dst, dst_linesize, src, src_linesize,
bytewidth, height);
#endif
if (ret < 0)
image_copy_plane(dst, dst_linesize, src, src_linesize, bytewidth, height);
}
void av_image_copy_plane(uint8_t *dst, int dst_linesize,
const uint8_t *src, int src_linesize,
int bytewidth, int height)
{
image_copy_plane(dst, dst_linesize, src, src_linesize, bytewidth, height);
}
static void image_copy(uint8_t *dst_data[4], const ptrdiff_t dst_linesizes[4],
const uint8_t *src_data[4], const ptrdiff_t src_linesizes[4],
enum AVPixelFormat pix_fmt, int width, int height,
void (*copy_plane)(uint8_t *, ptrdiff_t, const uint8_t *,
ptrdiff_t, ptrdiff_t, int))
{
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
@ -276,9 +301,9 @@ void av_image_copy(uint8_t *dst_data[4], int dst_linesizes[4],
if (desc->flags & AV_PIX_FMT_FLAG_PAL ||
desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL) {
av_image_copy_plane(dst_data[0], dst_linesizes[0],
src_data[0], src_linesizes[0],
width, height);
copy_plane(dst_data[0], dst_linesizes[0],
src_data[0], src_linesizes[0],
width, height);
/* copy the palette */
memcpy(dst_data[1], src_data[1], 4*256);
} else {
@ -289,17 +314,41 @@ void av_image_copy(uint8_t *dst_data[4], int dst_linesizes[4],
for (i = 0; i < planes_nb; i++) {
int h = height;
int bwidth = av_image_get_linesize(pix_fmt, width, i);
ptrdiff_t bwidth = av_image_get_linesize(pix_fmt, width, i);
if (i == 1 || i == 2) {
h = AV_CEIL_RSHIFT(height, desc->log2_chroma_h);
}
av_image_copy_plane(dst_data[i], dst_linesizes[i],
src_data[i], src_linesizes[i],
bwidth, h);
copy_plane(dst_data[i], dst_linesizes[i],
src_data[i], src_linesizes[i],
bwidth, h);
}
}
}
void av_image_copy(uint8_t *dst_data[4], int dst_linesizes[4],
const uint8_t *src_data[4], const int src_linesizes[4],
enum AVPixelFormat pix_fmt, int width, int height)
{
ptrdiff_t dst_linesizes1[4], src_linesizes1[4];
int i;
for (i = 0; i < 4; i++) {
dst_linesizes1[i] = dst_linesizes[i];
src_linesizes1[i] = src_linesizes[i];
}
image_copy(dst_data, dst_linesizes1, src_data, src_linesizes1, pix_fmt,
width, height, image_copy_plane);
}
void av_image_copy_uc_from(uint8_t *dst_data[4], const ptrdiff_t dst_linesizes[4],
const uint8_t *src_data[4], const ptrdiff_t src_linesizes[4],
enum AVPixelFormat pix_fmt, int width, int height)
{
image_copy(dst_data, dst_linesizes, src_data, src_linesizes, pix_fmt,
width, height, image_copy_plane_uc_from);
}
int av_image_fill_arrays(uint8_t *dst_data[4], int dst_linesize[4],
const uint8_t *src, enum AVPixelFormat pix_fmt,
int width, int height, int align)

18
libavutil/imgutils.h
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@ -117,6 +117,24 @@ void av_image_copy(uint8_t *dst_data[4], int dst_linesizes[4],
const uint8_t *src_data[4], const int src_linesizes[4],
enum AVPixelFormat pix_fmt, int width, int height);
/**
* Copy image data located in uncacheable (e.g. GPU mapped) memory. Where
* available, this function will use special functionality for reading from such
* memory, which may result in greatly improved performance compared to plain
* av_image_copy().
*
* The data pointers and the linesizes must be aligned to the maximum required
* by the CPU architecture.
*
* @note The linesize parameters have the type ptrdiff_t here, while they are
* int for av_image_copy().
* @note On x86, the linesizes currently need to be aligned to the cacheline
* size (i.e. 64) to get improved performance.
*/
void av_image_copy_uc_from(uint8_t *dst_data[4], const ptrdiff_t dst_linesizes[4],
const uint8_t *src_data[4], const ptrdiff_t src_linesizes[4],
enum AVPixelFormat pix_fmt, int width, int height);
/**
* Setup the data pointers and linesizes based on the specified image
* parameters and the provided array.

30
libavutil/imgutils_internal.h Normal file
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@ -0,0 +1,30 @@
/*
* 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
*/
#ifndef AVUTIL_IMGUTILS_INTERNAL_H
#define AVUTIL_IMGUTILS_INTERNAL_H
#include <stddef.h>
#include <stdint.h>
int ff_image_copy_plane_uc_from_x86(uint8_t *dst, ptrdiff_t dst_linesize,
const uint8_t *src, ptrdiff_t src_linesize,
ptrdiff_t bytewidth, int height);
#endif /* AVUTIL_IMGUTILS_INTERNAL_H */

2
libavutil/version.h
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@ -54,7 +54,7 @@
*/
#define LIBAVUTIL_VERSION_MAJOR 55
#define LIBAVUTIL_VERSION_MINOR 20
#define LIBAVUTIL_VERSION_MINOR 21
#define LIBAVUTIL_VERSION_MICRO 0
#define LIBAVUTIL_VERSION_INT AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \

2
libavutil/x86/Makefile
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@ -1,8 +1,10 @@
OBJS += x86/cpu.o \
x86/float_dsp_init.o \
x86/imgutils_init.o \
x86/lls_init.o \
YASM-OBJS += x86/cpuid.o \
x86/emms.o \
x86/float_dsp.o \
x86/imgutils.o \
x86/lls.o \

53
libavutil/x86/imgutils.asm Normal file
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@ -0,0 +1,53 @@
;*****************************************************************************
;* Copyright 2016 Anton Khirnov
;*
;* 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 .text
INIT_XMM sse4
cglobal image_copy_plane_uc_from, 6, 7, 4, dst, dst_linesize, src, src_linesize, bw, height, rowpos
add dstq, bwq
add srcq, bwq
neg bwq
.row_start
mov rowposq, bwq
.loop
movntdqa m0, [srcq + rowposq + 0 * mmsize]
movntdqa m1, [srcq + rowposq + 1 * mmsize]
movntdqa m2, [srcq + rowposq + 2 * mmsize]
movntdqa m3, [srcq + rowposq + 3 * mmsize]
mova [dstq + rowposq + 0 * mmsize], m0
mova [dstq + rowposq + 1 * mmsize], m1
mova [dstq + rowposq + 2 * mmsize], m2
mova [dstq + rowposq + 3 * mmsize], m3
add rowposq, 4 * mmsize
jnz .loop
add srcq, src_linesizeq
add dstq, dst_linesizeq
dec heightd
jnz .row_start
RET

49
libavutil/x86/imgutils_init.c Normal file
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@ -0,0 +1,49 @@
/*
* 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 <stddef.h>
#include <stdint.h>
#include "libavutil/cpu.h"
#include "libavutil/error.h"
#include "libavutil/imgutils.h"
#include "libavutil/imgutils_internal.h"
#include "libavutil/internal.h"
#include "cpu.h"
void ff_image_copy_plane_uc_from_sse4(uint8_t *dst, ptrdiff_t dst_linesize,
const uint8_t *src, ptrdiff_t src_linesize,
ptrdiff_t bytewidth, int height);
int ff_image_copy_plane_uc_from_x86(uint8_t *dst, ptrdiff_t dst_linesize,
const uint8_t *src, ptrdiff_t src_linesize,
ptrdiff_t bytewidth, int height)
{
int cpu_flags = av_get_cpu_flags();
ptrdiff_t bw_aligned = FFALIGN(bytewidth, 64);
if (EXTERNAL_SSE4(cpu_flags) &&
bw_aligned <= dst_linesize && bw_aligned <= src_linesize)
ff_image_copy_plane_uc_from_sse4(dst, dst_linesize, src, src_linesize,
bw_aligned, height);
else
return AVERROR(ENOSYS);
return 0;
}