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FFmpeg/libavfilter/vf_mestimate.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

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/**
* Copyright (c) 2016 Davinder Singh (DSM_) <ds.mudhar<@gmail.com>
*
* 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 "motion_estimation.h"
#include "libavcodec/mathops.h"
#include "libavutil/common.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/motion_vector.h"
#include "avfilter.h"
#include "internal.h"
#include "video.h"
typedef struct MEContext {
const AVClass *class;
AVMotionEstContext me_ctx;
int method; ///< motion estimation method
int mb_size; ///< macroblock size
int search_param; ///< search parameter
int b_width, b_height, b_count;
int log2_mb_size;
AVFrame *prev, *cur, *next;
int (*mv_table[3])[2][2]; ///< motion vectors of current & prev 2 frames
} MEContext;
#define OFFSET(x) offsetof(MEContext, x)
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
#define CONST(name, help, val, u) { name, help, 0, AV_OPT_TYPE_CONST, {.i64=val}, 0, 0, FLAGS, .unit = u }
static const AVOption mestimate_options[] = {
{ "method", "motion estimation method", OFFSET(method), AV_OPT_TYPE_INT, {.i64 = AV_ME_METHOD_ESA}, AV_ME_METHOD_ESA, AV_ME_METHOD_UMH, FLAGS, .unit = "method" },
CONST("esa", "exhaustive search", AV_ME_METHOD_ESA, "method"),
CONST("tss", "three step search", AV_ME_METHOD_TSS, "method"),
CONST("tdls", "two dimensional logarithmic search", AV_ME_METHOD_TDLS, "method"),
CONST("ntss", "new three step search", AV_ME_METHOD_NTSS, "method"),
CONST("fss", "four step search", AV_ME_METHOD_FSS, "method"),
CONST("ds", "diamond search", AV_ME_METHOD_DS, "method"),
CONST("hexbs", "hexagon-based search", AV_ME_METHOD_HEXBS, "method"),
CONST("epzs", "enhanced predictive zonal search", AV_ME_METHOD_EPZS, "method"),
CONST("umh", "uneven multi-hexagon search", AV_ME_METHOD_UMH, "method"),
{ "mb_size", "macroblock size", OFFSET(mb_size), AV_OPT_TYPE_INT, {.i64 = 16}, 8, INT_MAX, FLAGS },
{ "search_param", "search parameter", OFFSET(search_param), AV_OPT_TYPE_INT, {.i64 = 7}, 4, INT_MAX, FLAGS },
{ NULL }
};
AVFILTER_DEFINE_CLASS(mestimate);
static const enum AVPixelFormat pix_fmts[] = {
AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P,
AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,
AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P,
AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
AV_PIX_FMT_YUVJ411P,
AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
AV_PIX_FMT_GRAY8,
AV_PIX_FMT_NONE
};
static int config_input(AVFilterLink *inlink)
{
MEContext *s = inlink->dst->priv;
int i;
s->log2_mb_size = av_ceil_log2_c(s->mb_size);
s->mb_size = 1 << s->log2_mb_size;
s->b_width = inlink->w >> s->log2_mb_size;
s->b_height = inlink->h >> s->log2_mb_size;
s->b_count = s->b_width * s->b_height;
if (s->b_count == 0)
return AVERROR(EINVAL);
for (i = 0; i < 3; i++) {
s->mv_table[i] = av_calloc(s->b_count, sizeof(*s->mv_table[0]));
if (!s->mv_table[i])
return AVERROR(ENOMEM);
}
ff_me_init_context(&s->me_ctx, s->mb_size, s->search_param, inlink->w, inlink->h, 0, (s->b_width - 1) << s->log2_mb_size, 0, (s->b_height - 1) << s->log2_mb_size);
return 0;
}
static void add_mv_data(AVMotionVector *mv, int mb_size,
int x, int y, int x_mv, int y_mv, int dir)
{
mv->w = mb_size;
mv->h = mb_size;
mv->dst_x = x + (mb_size >> 1);
mv->dst_y = y + (mb_size >> 1);
mv->src_x = x_mv + (mb_size >> 1);
mv->src_y = y_mv + (mb_size >> 1);
mv->source = dir ? 1 : -1;
mv->flags = 0;
}
#define SEARCH_MV(method)\
do {\
for (mb_y = 0; mb_y < s->b_height; mb_y++)\
for (mb_x = 0; mb_x < s->b_width; mb_x++) {\
const int x_mb = mb_x << s->log2_mb_size;\
const int y_mb = mb_y << s->log2_mb_size;\
int mv[2] = {x_mb, y_mb};\
ff_me_search_##method(me_ctx, x_mb, y_mb, mv);\
add_mv_data(((AVMotionVector *) sd->data) + mv_count++, me_ctx->mb_size, x_mb, y_mb, mv[0], mv[1], dir);\
}\
} while (0)
#define ADD_PRED(preds, px, py)\
do {\
preds.mvs[preds.nb][0] = px;\
preds.mvs[preds.nb][1] = py;\
preds.nb++;\
} while(0)
static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
{
AVFilterContext *ctx = inlink->dst;
MEContext *s = ctx->priv;
AVMotionEstContext *me_ctx = &s->me_ctx;
AVFrameSideData *sd;
AVFrame *out;
int mb_x, mb_y, dir;
int32_t mv_count = 0;
int ret;
if (frame->pts == AV_NOPTS_VALUE) {
ret = ff_filter_frame(ctx->outputs[0], frame);
return ret;
}
av_frame_free(&s->prev);
s->prev = s->cur;
s->cur = s->next;
s->next = frame;
s->mv_table[2] = memcpy(s->mv_table[2], s->mv_table[1], sizeof(*s->mv_table[1]) * s->b_count);
s->mv_table[1] = memcpy(s->mv_table[1], s->mv_table[0], sizeof(*s->mv_table[0]) * s->b_count);
if (!s->cur) {
s->cur = av_frame_clone(frame);
if (!s->cur)
return AVERROR(ENOMEM);
}
if (!s->prev)
return 0;
out = av_frame_clone(s->cur);
if (!out)
return AVERROR(ENOMEM);
sd = av_frame_new_side_data(out, AV_FRAME_DATA_MOTION_VECTORS, 2 * s->b_count * sizeof(AVMotionVector));
if (!sd) {
av_frame_free(&out);
return AVERROR(ENOMEM);
}
me_ctx->data_cur = s->cur->data[0];
me_ctx->linesize = s->cur->linesize[0];
for (dir = 0; dir < 2; dir++) {
me_ctx->data_ref = (dir ? s->next : s->prev)->data[0];
if (s->method == AV_ME_METHOD_DS)
SEARCH_MV(ds);
else if (s->method == AV_ME_METHOD_ESA)
SEARCH_MV(esa);
else if (s->method == AV_ME_METHOD_FSS)
SEARCH_MV(fss);
else if (s->method == AV_ME_METHOD_NTSS)
SEARCH_MV(ntss);
else if (s->method == AV_ME_METHOD_TDLS)
SEARCH_MV(tdls);
else if (s->method == AV_ME_METHOD_TSS)
SEARCH_MV(tss);
else if (s->method == AV_ME_METHOD_HEXBS)
SEARCH_MV(hexbs);
else if (s->method == AV_ME_METHOD_UMH) {
for (mb_y = 0; mb_y < s->b_height; mb_y++)
for (mb_x = 0; mb_x < s->b_width; mb_x++) {
const int mb_i = mb_x + mb_y * s->b_width;
const int x_mb = mb_x << s->log2_mb_size;
const int y_mb = mb_y << s->log2_mb_size;
int mv[2] = {x_mb, y_mb};
AVMotionEstPredictor *preds = me_ctx->preds;
preds[0].nb = 0;
ADD_PRED(preds[0], 0, 0);
//left mb in current frame
if (mb_x > 0)
ADD_PRED(preds[0], s->mv_table[0][mb_i - 1][dir][0], s->mv_table[0][mb_i - 1][dir][1]);
if (mb_y > 0) {
//top mb in current frame
ADD_PRED(preds[0], s->mv_table[0][mb_i - s->b_width][dir][0], s->mv_table[0][mb_i - s->b_width][dir][1]);
//top-right mb in current frame
if (mb_x + 1 < s->b_width)
ADD_PRED(preds[0], s->mv_table[0][mb_i - s->b_width + 1][dir][0], s->mv_table[0][mb_i - s->b_width + 1][dir][1]);
//top-left mb in current frame
else if (mb_x > 0)
ADD_PRED(preds[0], s->mv_table[0][mb_i - s->b_width - 1][dir][0], s->mv_table[0][mb_i - s->b_width - 1][dir][1]);
}
//median predictor
if (preds[0].nb == 4) {
me_ctx->pred_x = mid_pred(preds[0].mvs[1][0], preds[0].mvs[2][0], preds[0].mvs[3][0]);
me_ctx->pred_y = mid_pred(preds[0].mvs[1][1], preds[0].mvs[2][1], preds[0].mvs[3][1]);
} else if (preds[0].nb == 3) {
me_ctx->pred_x = mid_pred(0, preds[0].mvs[1][0], preds[0].mvs[2][0]);
me_ctx->pred_y = mid_pred(0, preds[0].mvs[1][1], preds[0].mvs[2][1]);
} else if (preds[0].nb == 2) {
me_ctx->pred_x = preds[0].mvs[1][0];
me_ctx->pred_y = preds[0].mvs[1][1];
} else {
me_ctx->pred_x = 0;
me_ctx->pred_y = 0;
}
ff_me_search_umh(me_ctx, x_mb, y_mb, mv);
s->mv_table[0][mb_i][dir][0] = mv[0] - x_mb;
s->mv_table[0][mb_i][dir][1] = mv[1] - y_mb;
add_mv_data(((AVMotionVector *) sd->data) + mv_count++, me_ctx->mb_size, x_mb, y_mb, mv[0], mv[1], dir);
}
} else if (s->method == AV_ME_METHOD_EPZS) {
for (mb_y = 0; mb_y < s->b_height; mb_y++)
for (mb_x = 0; mb_x < s->b_width; mb_x++) {
const int mb_i = mb_x + mb_y * s->b_width;
const int x_mb = mb_x << s->log2_mb_size;
const int y_mb = mb_y << s->log2_mb_size;
int mv[2] = {x_mb, y_mb};
AVMotionEstPredictor *preds = me_ctx->preds;
preds[0].nb = 0;
preds[1].nb = 0;
ADD_PRED(preds[0], 0, 0);
//left mb in current frame
if (mb_x > 0)
ADD_PRED(preds[0], s->mv_table[0][mb_i - 1][dir][0], s->mv_table[0][mb_i - 1][dir][1]);
//top mb in current frame
if (mb_y > 0)
ADD_PRED(preds[0], s->mv_table[0][mb_i - s->b_width][dir][0], s->mv_table[0][mb_i - s->b_width][dir][1]);
//top-right mb in current frame
if (mb_y > 0 && mb_x + 1 < s->b_width)
ADD_PRED(preds[0], s->mv_table[0][mb_i - s->b_width + 1][dir][0], s->mv_table[0][mb_i - s->b_width + 1][dir][1]);
//median predictor
if (preds[0].nb == 4) {
me_ctx->pred_x = mid_pred(preds[0].mvs[1][0], preds[0].mvs[2][0], preds[0].mvs[3][0]);
me_ctx->pred_y = mid_pred(preds[0].mvs[1][1], preds[0].mvs[2][1], preds[0].mvs[3][1]);
} else if (preds[0].nb == 3) {
me_ctx->pred_x = mid_pred(0, preds[0].mvs[1][0], preds[0].mvs[2][0]);
me_ctx->pred_y = mid_pred(0, preds[0].mvs[1][1], preds[0].mvs[2][1]);
} else if (preds[0].nb == 2) {
me_ctx->pred_x = preds[0].mvs[1][0];
me_ctx->pred_y = preds[0].mvs[1][1];
} else {
me_ctx->pred_x = 0;
me_ctx->pred_y = 0;
}
//collocated mb in prev frame
ADD_PRED(preds[0], s->mv_table[1][mb_i][dir][0], s->mv_table[1][mb_i][dir][1]);
//accelerator motion vector of collocated block in prev frame
ADD_PRED(preds[1], s->mv_table[1][mb_i][dir][0] + (s->mv_table[1][mb_i][dir][0] - s->mv_table[2][mb_i][dir][0]),
s->mv_table[1][mb_i][dir][1] + (s->mv_table[1][mb_i][dir][1] - s->mv_table[2][mb_i][dir][1]));
//left mb in prev frame
if (mb_x > 0)
ADD_PRED(preds[1], s->mv_table[1][mb_i - 1][dir][0], s->mv_table[1][mb_i - 1][dir][1]);
//top mb in prev frame
if (mb_y > 0)
ADD_PRED(preds[1], s->mv_table[1][mb_i - s->b_width][dir][0], s->mv_table[1][mb_i - s->b_width][dir][1]);
//right mb in prev frame
if (mb_x + 1 < s->b_width)
ADD_PRED(preds[1], s->mv_table[1][mb_i + 1][dir][0], s->mv_table[1][mb_i + 1][dir][1]);
//bottom mb in prev frame
if (mb_y + 1 < s->b_height)
ADD_PRED(preds[1], s->mv_table[1][mb_i + s->b_width][dir][0], s->mv_table[1][mb_i + s->b_width][dir][1]);
ff_me_search_epzs(me_ctx, x_mb, y_mb, mv);
s->mv_table[0][mb_i][dir][0] = mv[0] - x_mb;
s->mv_table[0][mb_i][dir][1] = mv[1] - y_mb;
add_mv_data(((AVMotionVector *) sd->data) + mv_count++, s->mb_size, x_mb, y_mb, mv[0], mv[1], dir);
}
}
}
return ff_filter_frame(ctx->outputs[0], out);
}
static av_cold void uninit(AVFilterContext *ctx)
{
MEContext *s = ctx->priv;
int i;
av_frame_free(&s->prev);
av_frame_free(&s->cur);
av_frame_free(&s->next);
for (i = 0; i < 3; i++)
av_freep(&s->mv_table[i]);
}
static const AVFilterPad mestimate_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = filter_frame,
.config_props = config_input,
},
};
const AVFilter ff_vf_mestimate = {
.name = "mestimate",
.description = NULL_IF_CONFIG_SMALL("Generate motion vectors."),
.priv_size = sizeof(MEContext),
.priv_class = &mestimate_class,
.uninit = uninit,
.flags = AVFILTER_FLAG_METADATA_ONLY,
FILTER_INPUTS(mestimate_inputs),
FILTER_OUTPUTS(ff_video_default_filterpad),
FILTER_PIXFMTS_ARRAY(pix_fmts),
};
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