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FFmpeg/libavfilter/vf_shufflepixels.c
Andreas Rheinhardt 790f793844 avutil/common: Don't auto-include mem.h
There are lots of files that don't need it: The number of object
files that actually need it went down from 2011 to 884 here.

Keep it for external users in order to not cause breakages.

Also improve the other headers a bit while just at it.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2024-03-31 00:08:43 +01:00

454 lines
18 KiB
C

/*
* Copyright (c) 2020 Paul B Mahol
*
* 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/avassert.h"
#include "libavutil/common.h"
#include "libavutil/internal.h"
#include "libavutil/imgutils.h"
#include "libavutil/lfg.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "libavutil/random_seed.h"
#include "avfilter.h"
#include "internal.h"
#include "video.h"
typedef struct ShufflePixelsContext {
const AVClass *class;
int block_w, block_h;
int mode;
int direction;
int64_t seed;
int depth;
int nb_planes;
int linesize[4];
int planewidth[4];
int planeheight[4];
int nb_blocks;
uint8_t *used;
int32_t *map;
AVLFG c;
int (*shuffle_pixels)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
} ShufflePixelsContext;
static const enum AVPixelFormat pix_fmts[] = {
AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16,
AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVA444P,
AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRAP10,
AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
AV_PIX_FMT_GBRAP16, AV_PIX_FMT_GBRAP,
AV_PIX_FMT_YUV444P9, AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_YUV444P10, AV_PIX_FMT_YUVA444P10,
AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV444P16, AV_PIX_FMT_YUVA444P16,
AV_PIX_FMT_NONE
};
static void make_horizontal_map(AVFilterContext *ctx)
{
ShufflePixelsContext *s = ctx->priv;
const int nb_blocks = s->nb_blocks;
AVLFG *c = &s->c;
uint8_t *used = s->used;
int32_t *map = s->map;
for (int x = 0; x < s->planewidth[0];) {
int rand = av_lfg_get(c) % nb_blocks;
if (used[rand] == 0) {
int width;
if (s->direction) {
width = FFMIN(s->block_w, s->planewidth[0] - x);
map[rand * s->block_w] = x;
} else {
width = FFMIN(s->block_w, s->planewidth[0] - rand * s->block_w);
map[x] = rand * s->block_w;
}
used[rand] = 1;
if (s->direction) {
for (int i = 1; i < width; i++) {
map[rand * s->block_w + i] = map[rand * s->block_w] + i;
}
} else {
for (int i = 1; i < width; i++) {
map[x + i] = map[x] + i;
}
}
x += width;
}
}
}
static void make_vertical_map(AVFilterContext *ctx)
{
ShufflePixelsContext *s = ctx->priv;
const int nb_blocks = s->nb_blocks;
AVLFG *c = &s->c;
uint8_t *used = s->used;
int32_t *map = s->map;
for (int y = 0; y < s->planeheight[0];) {
int rand = av_lfg_get(c) % nb_blocks;
if (used[rand] == 0) {
int height;
if (s->direction) {
height = FFMIN(s->block_h, s->planeheight[0] - y);
map[rand * s->block_h] = y;
} else {
height = FFMIN(s->block_h, s->planeheight[0] - rand * s->block_h);
map[y] = rand * s->block_h;
}
used[rand] = 1;
if (s->direction) {
for (int i = 1; i < height; i++) {
map[rand * s->block_h + i] = map[rand * s->block_h] + i;
}
} else {
for (int i = 1; i < height; i++) {
map[y + i] = map[y] + i;
}
}
y += height;
}
}
}
static void make_block_map(AVFilterContext *ctx)
{
ShufflePixelsContext *s = ctx->priv;
const int nb_blocks = s->nb_blocks;
int nb_blocks_w = s->planewidth[0] / s->block_w;
AVLFG *c = &s->c;
uint8_t *used = s->used;
int32_t *map = s->map;
for (int i = 0; i < nb_blocks;) {
int rand = av_lfg_get(c) % nb_blocks;
if (used[rand] == 0) {
int yin = i / nb_blocks_w;
int xin = i % nb_blocks_w;
int in = yin * s->block_h * s->planewidth[0] + xin * s->block_w;
int yout = rand / nb_blocks_w;
int xout = rand % nb_blocks_w;
int out = yout * s->block_h * s->planewidth[0] + xout * s->block_w;
if (s->direction) {
map[out] = in;
} else {
map[in] = out;
}
used[rand] = 1;
if (s->direction) {
for (int y = 0; y < s->block_h; y++) {
for (int x = 0; x < s->block_w; x++) {
map[out + y * s->planewidth[0] + x] = map[out] + x + y * s->planewidth[0];
}
}
} else {
for (int y = 0; y < s->block_h; y++) {
for (int x = 0; x < s->block_w; x++) {
map[in + y * s->planewidth[0] + x] = map[in] + x + y * s->planewidth[0];
}
}
}
i++;
}
}
}
typedef struct ThreadData {
AVFrame *in, *out;
} ThreadData;
#define SHUFFLE_HORIZONTAL(name, type) \
static int shuffle_horizontal## name(AVFilterContext *ctx, void *arg, \
int jobnr, int nb_jobs) \
{ \
ShufflePixelsContext *s = ctx->priv; \
ThreadData *td = arg; \
AVFrame *in = td->in; \
AVFrame *out = td->out; \
\
for (int p = 0; p < s->nb_planes; p++) { \
const int slice_start = (s->planeheight[p] * jobnr) / nb_jobs; \
const int slice_end = (s->planeheight[p] * (jobnr+1)) / nb_jobs; \
type *dst = (type *)(out->data[p] + slice_start * out->linesize[p]); \
const type *src = (const type *)(in->data[p] + \
slice_start * in->linesize[p]); \
const int32_t *map = s->map; \
\
for (int y = slice_start; y < slice_end; y++) { \
for (int x = 0; x < s->planewidth[p]; x++) { \
dst[x] = src[map[x]]; \
} \
\
dst += out->linesize[p] / sizeof(type); \
src += in->linesize[p] / sizeof(type); \
} \
} \
\
return 0; \
}
SHUFFLE_HORIZONTAL(8, uint8_t)
SHUFFLE_HORIZONTAL(16, uint16_t)
#define SHUFFLE_VERTICAL(name, type) \
static int shuffle_vertical## name(AVFilterContext *ctx, void *arg, \
int jobnr, int nb_jobs) \
{ \
ShufflePixelsContext *s = ctx->priv; \
ThreadData *td = arg; \
AVFrame *in = td->in; \
AVFrame *out = td->out; \
\
for (int p = 0; p < s->nb_planes; p++) { \
const int slice_start = (s->planeheight[p] * jobnr) / nb_jobs; \
const int slice_end = (s->planeheight[p] * (jobnr+1)) / nb_jobs; \
type *dst = (type *)(out->data[p] + slice_start * out->linesize[p]); \
const int32_t *map = s->map; \
\
for (int y = slice_start; y < slice_end; y++) { \
const type *src = (const type *)(in->data[p] + \
map[y] * in->linesize[p]); \
\
memcpy(dst, src, s->linesize[p]); \
dst += out->linesize[p] / sizeof(type); \
} \
} \
\
return 0; \
}
SHUFFLE_VERTICAL(8, uint8_t)
SHUFFLE_VERTICAL(16, uint16_t)
#define SHUFFLE_BLOCK(name, type) \
static int shuffle_block## name(AVFilterContext *ctx, void *arg, \
int jobnr, int nb_jobs) \
{ \
ShufflePixelsContext *s = ctx->priv; \
ThreadData *td = arg; \
AVFrame *in = td->in; \
AVFrame *out = td->out; \
\
for (int p = 0; p < s->nb_planes; p++) { \
const int slice_start = (s->planeheight[p] * jobnr) / nb_jobs; \
const int slice_end = (s->planeheight[p] * (jobnr+1)) / nb_jobs; \
type *dst = (type *)(out->data[p] + slice_start * out->linesize[p]); \
const type *src = (const type *)in->data[p]; \
const int32_t *map = s->map + slice_start * s->planewidth[p]; \
\
for (int y = slice_start; y < slice_end; y++) { \
for (int x = 0; x < s->planewidth[p]; x++) { \
int ymap = map[x] / s->planewidth[p]; \
int xmap = map[x] % s->planewidth[p]; \
\
dst[x] = src[xmap + ymap * in->linesize[p] / sizeof(type)]; \
} \
\
dst += out->linesize[p] / sizeof(type); \
map += s->planewidth[p]; \
} \
} \
\
return 0; \
}
SHUFFLE_BLOCK(8, uint8_t)
SHUFFLE_BLOCK(16, uint16_t)
static int config_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
ShufflePixelsContext *s = ctx->priv;
AVFilterLink *inlink = ctx->inputs[0];
const AVPixFmtDescriptor *desc;
int ret;
if (s->seed == -1)
s->seed = av_get_random_seed();
av_lfg_init(&s->c, s->seed);
desc = av_pix_fmt_desc_get(outlink->format);
if (!desc)
return AVERROR_BUG;
s->nb_planes = av_pix_fmt_count_planes(outlink->format);
s->depth = desc->comp[0].depth;
if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
return ret;
s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
s->planewidth[0] = s->planewidth[3] = inlink->w;
s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
s->planeheight[0] = s->planeheight[3] = inlink->h;
s->map = av_calloc(inlink->w * inlink->h, sizeof(*s->map));
if (!s->map)
return AVERROR(ENOMEM);
switch (s->mode) {
case 0:
s->shuffle_pixels = s->depth <= 8 ? shuffle_horizontal8 : shuffle_horizontal16;
s->nb_blocks = (s->planewidth[0] + s->block_w - 1) / s->block_w;
break;
case 1:
s->shuffle_pixels = s->depth <= 8 ? shuffle_vertical8 : shuffle_vertical16;
s->nb_blocks = (s->planeheight[0] + s->block_h - 1) / s->block_h;
break;
case 2:
s->shuffle_pixels = s->depth <= 8 ? shuffle_block8 : shuffle_block16;
s->nb_blocks = (s->planeheight[0] / s->block_h) *
(s->planewidth[0] / s->block_w);
break;
default:
av_assert0(0);
}
s->used = av_calloc(s->nb_blocks, sizeof(*s->used));
if (!s->used)
return AVERROR(ENOMEM);
switch (s->mode) {
case 0:
make_horizontal_map(ctx);
break;
case 1:
make_vertical_map(ctx);
break;
case 2:
make_block_map(ctx);
break;
default:
av_assert0(0);
}
return 0;
}
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
AVFilterContext *ctx = inlink->dst;
ShufflePixelsContext *s = ctx->priv;
AVFrame *out = ff_get_video_buffer(ctx->outputs[0], in->width, in->height);
ThreadData td;
int ret;
if (!out) {
ret = AVERROR(ENOMEM);
goto fail;
}
ret = av_frame_copy_props(out, in);
if (ret < 0) {
av_frame_free(&out);
goto fail;
}
td.out = out;
td.in = in;
ff_filter_execute(ctx, s->shuffle_pixels, &td, NULL,
FFMIN(s->planeheight[1], ff_filter_get_nb_threads(ctx)));
av_frame_free(&in);
return ff_filter_frame(ctx->outputs[0], out);
fail:
av_frame_free(&in);
return ret;
}
static av_cold void uninit(AVFilterContext *ctx)
{
ShufflePixelsContext *s = ctx->priv;
av_freep(&s->map);
av_freep(&s->used);
}
#define OFFSET(x) offsetof(ShufflePixelsContext, x)
#define FLAGS (AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_VIDEO_PARAM)
static const AVOption shufflepixels_options[] = {
{ "direction", "set shuffle direction", OFFSET(direction), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, .unit = "dir" },
{ "d", "set shuffle direction", OFFSET(direction), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, .unit = "dir" },
{ "forward", 0, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, .unit = "dir" },
{ "inverse", 0, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, .unit = "dir" },
{ "mode", "set shuffle mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=0}, 0, 2, FLAGS, .unit = "mode" },
{ "m", "set shuffle mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=0}, 0, 2, FLAGS, .unit = "mode" },
{ "horizontal", 0, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, .unit = "mode" },
{ "vertical", 0, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, .unit = "mode" },
{ "block", 0, 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, FLAGS, .unit = "mode" },
{ "width", "set block width", OFFSET(block_w), AV_OPT_TYPE_INT, {.i64=10}, 1, 8000, FLAGS },
{ "w", "set block width", OFFSET(block_w), AV_OPT_TYPE_INT, {.i64=10}, 1, 8000, FLAGS },
{ "height", "set block height", OFFSET(block_h), AV_OPT_TYPE_INT, {.i64=10}, 1, 8000, FLAGS },
{ "h", "set block height", OFFSET(block_h), AV_OPT_TYPE_INT, {.i64=10}, 1, 8000, FLAGS },
{ "seed", "set random seed", OFFSET(seed), AV_OPT_TYPE_INT64, {.i64=-1}, -1, UINT_MAX, FLAGS },
{ "s", "set random seed", OFFSET(seed), AV_OPT_TYPE_INT64, {.i64=-1}, -1, UINT_MAX, FLAGS },
{ NULL },
};
AVFILTER_DEFINE_CLASS(shufflepixels);
static const AVFilterPad shufflepixels_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = filter_frame,
},
};
static const AVFilterPad shufflepixels_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_output,
},
};
const AVFilter ff_vf_shufflepixels = {
.name = "shufflepixels",
.description = NULL_IF_CONFIG_SMALL("Shuffle video pixels."),
.priv_size = sizeof(ShufflePixelsContext),
.priv_class = &shufflepixels_class,
.uninit = uninit,
FILTER_INPUTS(shufflepixels_inputs),
FILTER_OUTPUTS(shufflepixels_outputs),
FILTER_PIXFMTS_ARRAY(pix_fmts),
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
};