mirror of
https://github.com/FFmpeg/FFmpeg.git
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378 lines
15 KiB
C
378 lines
15 KiB
C
/**
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* Copyright (c) 2016 Davinder Singh (DSM_) <ds.mudhar<@gmail.com>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "motion_estimation.h"
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#include "libavcodec/mathops.h"
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#include "libavutil/avassert.h"
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#include "libavutil/common.h"
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#include "libavutil/imgutils.h"
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#include "libavutil/opt.h"
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#include "libavutil/pixdesc.h"
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#include "libavutil/motion_vector.h"
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#include "avfilter.h"
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#include "formats.h"
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#include "internal.h"
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#include "video.h"
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typedef struct MEContext {
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const AVClass *class;
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AVMotionEstContext me_ctx;
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int method; ///< motion estimation method
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int mb_size; ///< macroblock size
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int search_param; ///< search parameter
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int b_width, b_height, b_count;
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int log2_mb_size;
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AVFrame *prev, *cur, *next;
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int (*mv_table[3])[2][2]; ///< motion vectors of current & prev 2 frames
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} MEContext;
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#define OFFSET(x) offsetof(MEContext, x)
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#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
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#define CONST(name, help, val, unit) { name, help, 0, AV_OPT_TYPE_CONST, {.i64=val}, 0, 0, FLAGS, unit }
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static const AVOption mestimate_options[] = {
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{ "method", "motion estimation method", OFFSET(method), AV_OPT_TYPE_INT, {.i64 = AV_ME_METHOD_ESA}, AV_ME_METHOD_ESA, AV_ME_METHOD_UMH, FLAGS, "method" },
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CONST("esa", "exhaustive search", AV_ME_METHOD_ESA, "method"),
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CONST("tss", "three step search", AV_ME_METHOD_TSS, "method"),
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CONST("tdls", "two dimensional logarithmic search", AV_ME_METHOD_TDLS, "method"),
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CONST("ntss", "new three step search", AV_ME_METHOD_NTSS, "method"),
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CONST("fss", "four step search", AV_ME_METHOD_FSS, "method"),
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CONST("ds", "diamond search", AV_ME_METHOD_DS, "method"),
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CONST("hexbs", "hexagon-based search", AV_ME_METHOD_HEXBS, "method"),
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CONST("epzs", "enhanced predictive zonal search", AV_ME_METHOD_EPZS, "method"),
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CONST("umh", "uneven multi-hexagon search", AV_ME_METHOD_UMH, "method"),
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{ "mb_size", "macroblock size", OFFSET(mb_size), AV_OPT_TYPE_INT, {.i64 = 16}, 8, INT_MAX, FLAGS },
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{ "search_param", "search parameter", OFFSET(search_param), AV_OPT_TYPE_INT, {.i64 = 7}, 4, INT_MAX, FLAGS },
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{ NULL }
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};
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AVFILTER_DEFINE_CLASS(mestimate);
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static int query_formats(AVFilterContext *ctx)
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{
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static const enum AVPixelFormat pix_fmts[] = {
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AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P,
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AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,
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AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P,
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AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
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AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
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AV_PIX_FMT_YUVJ411P,
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AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
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AV_PIX_FMT_GRAY8,
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AV_PIX_FMT_NONE
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};
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AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
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if (!fmts_list)
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return AVERROR(ENOMEM);
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return ff_set_common_formats(ctx, fmts_list);
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}
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static int config_input(AVFilterLink *inlink)
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{
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MEContext *s = inlink->dst->priv;
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int i;
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s->log2_mb_size = av_ceil_log2_c(s->mb_size);
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s->mb_size = 1 << s->log2_mb_size;
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s->b_width = inlink->w >> s->log2_mb_size;
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s->b_height = inlink->h >> s->log2_mb_size;
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s->b_count = s->b_width * s->b_height;
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for (i = 0; i < 3; i++) {
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s->mv_table[i] = av_mallocz_array(s->b_count, sizeof(*s->mv_table[0]));
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if (!s->mv_table[i])
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return AVERROR(ENOMEM);
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}
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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);
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return 0;
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}
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static void add_mv_data(AVMotionVector *mv, int mb_size,
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int x, int y, int x_mv, int y_mv, int dir)
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{
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mv->w = mb_size;
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mv->h = mb_size;
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mv->dst_x = x + (mb_size >> 1);
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mv->dst_y = y + (mb_size >> 1);
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mv->src_x = x_mv + (mb_size >> 1);
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mv->src_y = y_mv + (mb_size >> 1);
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mv->source = dir ? 1 : -1;
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mv->flags = 0;
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}
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#define SEARCH_MV(method)\
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do {\
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for (mb_y = 0; mb_y < s->b_height; mb_y++)\
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for (mb_x = 0; mb_x < s->b_width; mb_x++) {\
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const int x_mb = mb_x << s->log2_mb_size;\
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const int y_mb = mb_y << s->log2_mb_size;\
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int mv[2] = {x_mb, y_mb};\
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ff_me_search_##method(me_ctx, x_mb, y_mb, mv);\
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add_mv_data(((AVMotionVector *) sd->data) + mv_count++, me_ctx->mb_size, x_mb, y_mb, mv[0], mv[1], dir);\
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}\
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} while (0)
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#define ADD_PRED(preds, px, py)\
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do {\
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preds.mvs[preds.nb][0] = px;\
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preds.mvs[preds.nb][1] = py;\
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preds.nb++;\
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} while(0)
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static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
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{
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AVFilterContext *ctx = inlink->dst;
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MEContext *s = ctx->priv;
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AVMotionEstContext *me_ctx = &s->me_ctx;
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AVFrameSideData *sd;
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AVFrame *out;
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int mb_x, mb_y, dir;
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int32_t mv_count = 0;
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int ret;
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if (frame->pts == AV_NOPTS_VALUE) {
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ret = ff_filter_frame(ctx->outputs[0], frame);
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return ret;
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}
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av_frame_free(&s->prev);
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s->prev = s->cur;
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s->cur = s->next;
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s->next = frame;
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s->mv_table[2] = memcpy(s->mv_table[2], s->mv_table[1], sizeof(*s->mv_table[1]) * s->b_count);
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s->mv_table[1] = memcpy(s->mv_table[1], s->mv_table[0], sizeof(*s->mv_table[0]) * s->b_count);
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if (!s->cur) {
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s->cur = av_frame_clone(frame);
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if (!s->cur)
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return AVERROR(ENOMEM);
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}
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if (!s->prev)
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return 0;
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out = av_frame_clone(s->cur);
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if (!out)
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return AVERROR(ENOMEM);
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sd = av_frame_new_side_data(out, AV_FRAME_DATA_MOTION_VECTORS, 2 * s->b_count * sizeof(AVMotionVector));
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if (!sd) {
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av_frame_free(&out);
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return AVERROR(ENOMEM);
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}
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me_ctx->data_cur = s->cur->data[0];
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me_ctx->linesize = s->cur->linesize[0];
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for (dir = 0; dir < 2; dir++) {
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me_ctx->data_ref = (dir ? s->next : s->prev)->data[0];
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if (s->method == AV_ME_METHOD_DS)
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SEARCH_MV(ds);
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else if (s->method == AV_ME_METHOD_ESA)
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SEARCH_MV(esa);
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else if (s->method == AV_ME_METHOD_FSS)
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SEARCH_MV(fss);
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else if (s->method == AV_ME_METHOD_NTSS)
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SEARCH_MV(ntss);
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else if (s->method == AV_ME_METHOD_TDLS)
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SEARCH_MV(tdls);
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else if (s->method == AV_ME_METHOD_TSS)
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SEARCH_MV(tss);
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else if (s->method == AV_ME_METHOD_HEXBS)
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SEARCH_MV(hexbs);
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else if (s->method == AV_ME_METHOD_UMH) {
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for (mb_y = 0; mb_y < s->b_height; mb_y++)
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for (mb_x = 0; mb_x < s->b_width; mb_x++) {
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const int mb_i = mb_x + mb_y * s->b_width;
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const int x_mb = mb_x << s->log2_mb_size;
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const int y_mb = mb_y << s->log2_mb_size;
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int mv[2] = {x_mb, y_mb};
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AVMotionEstPredictor *preds = me_ctx->preds;
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preds[0].nb = 0;
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ADD_PRED(preds[0], 0, 0);
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//left mb in current frame
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if (mb_x > 0)
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ADD_PRED(preds[0], s->mv_table[0][mb_i - 1][dir][0], s->mv_table[0][mb_i - 1][dir][1]);
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if (mb_y > 0) {
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//top mb in current frame
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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]);
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//top-right mb in current frame
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if (mb_x + 1 < s->b_width)
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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]);
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//top-left mb in current frame
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else if (mb_x > 0)
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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]);
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}
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//median predictor
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if (preds[0].nb == 4) {
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me_ctx->pred_x = mid_pred(preds[0].mvs[1][0], preds[0].mvs[2][0], preds[0].mvs[3][0]);
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me_ctx->pred_y = mid_pred(preds[0].mvs[1][1], preds[0].mvs[2][1], preds[0].mvs[3][1]);
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} else if (preds[0].nb == 3) {
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me_ctx->pred_x = mid_pred(0, preds[0].mvs[1][0], preds[0].mvs[2][0]);
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me_ctx->pred_y = mid_pred(0, preds[0].mvs[1][1], preds[0].mvs[2][1]);
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} else if (preds[0].nb == 2) {
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me_ctx->pred_x = preds[0].mvs[1][0];
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me_ctx->pred_y = preds[0].mvs[1][1];
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} else {
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me_ctx->pred_x = 0;
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me_ctx->pred_y = 0;
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}
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ff_me_search_umh(me_ctx, x_mb, y_mb, mv);
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s->mv_table[0][mb_i][dir][0] = mv[0] - x_mb;
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s->mv_table[0][mb_i][dir][1] = mv[1] - y_mb;
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add_mv_data(((AVMotionVector *) sd->data) + mv_count++, me_ctx->mb_size, x_mb, y_mb, mv[0], mv[1], dir);
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}
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} else if (s->method == AV_ME_METHOD_EPZS) {
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for (mb_y = 0; mb_y < s->b_height; mb_y++)
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for (mb_x = 0; mb_x < s->b_width; mb_x++) {
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const int mb_i = mb_x + mb_y * s->b_width;
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const int x_mb = mb_x << s->log2_mb_size;
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const int y_mb = mb_y << s->log2_mb_size;
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int mv[2] = {x_mb, y_mb};
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AVMotionEstPredictor *preds = me_ctx->preds;
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preds[0].nb = 0;
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preds[1].nb = 0;
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ADD_PRED(preds[0], 0, 0);
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//left mb in current frame
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if (mb_x > 0)
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ADD_PRED(preds[0], s->mv_table[0][mb_i - 1][dir][0], s->mv_table[0][mb_i - 1][dir][1]);
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//top mb in current frame
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if (mb_y > 0)
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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]);
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//top-right mb in current frame
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if (mb_y > 0 && mb_x + 1 < s->b_width)
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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]);
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//median predictor
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if (preds[0].nb == 4) {
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me_ctx->pred_x = mid_pred(preds[0].mvs[1][0], preds[0].mvs[2][0], preds[0].mvs[3][0]);
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me_ctx->pred_y = mid_pred(preds[0].mvs[1][1], preds[0].mvs[2][1], preds[0].mvs[3][1]);
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} else if (preds[0].nb == 3) {
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me_ctx->pred_x = mid_pred(0, preds[0].mvs[1][0], preds[0].mvs[2][0]);
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me_ctx->pred_y = mid_pred(0, preds[0].mvs[1][1], preds[0].mvs[2][1]);
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} else if (preds[0].nb == 2) {
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me_ctx->pred_x = preds[0].mvs[1][0];
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me_ctx->pred_y = preds[0].mvs[1][1];
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} else {
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me_ctx->pred_x = 0;
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me_ctx->pred_y = 0;
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}
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//collocated mb in prev frame
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ADD_PRED(preds[0], s->mv_table[1][mb_i][dir][0], s->mv_table[1][mb_i][dir][1]);
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//accelerator motion vector of collocated block in prev frame
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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]),
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s->mv_table[1][mb_i][dir][1] + (s->mv_table[1][mb_i][dir][1] - s->mv_table[2][mb_i][dir][1]));
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//left mb in prev frame
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if (mb_x > 0)
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ADD_PRED(preds[1], s->mv_table[1][mb_i - 1][dir][0], s->mv_table[1][mb_i - 1][dir][1]);
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//top mb in prev frame
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if (mb_y > 0)
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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]);
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//right mb in prev frame
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if (mb_x + 1 < s->b_width)
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ADD_PRED(preds[1], s->mv_table[1][mb_i + 1][dir][0], s->mv_table[1][mb_i + 1][dir][1]);
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//bottom mb in prev frame
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if (mb_y + 1 < s->b_height)
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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]);
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ff_me_search_epzs(me_ctx, x_mb, y_mb, mv);
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s->mv_table[0][mb_i][dir][0] = mv[0] - x_mb;
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s->mv_table[0][mb_i][dir][1] = mv[1] - y_mb;
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add_mv_data(((AVMotionVector *) sd->data) + mv_count++, s->mb_size, x_mb, y_mb, mv[0], mv[1], dir);
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}
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}
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}
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return ff_filter_frame(ctx->outputs[0], out);
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}
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static av_cold void uninit(AVFilterContext *ctx)
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{
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MEContext *s = ctx->priv;
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int i;
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av_frame_free(&s->prev);
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av_frame_free(&s->cur);
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av_frame_free(&s->next);
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for (i = 0; i < 3; i++)
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av_freep(&s->mv_table[i]);
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}
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static const AVFilterPad mestimate_inputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.filter_frame = filter_frame,
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.config_props = config_input,
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},
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{ NULL }
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};
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static const AVFilterPad mestimate_outputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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},
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{ NULL }
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};
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AVFilter ff_vf_mestimate = {
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.name = "mestimate",
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.description = NULL_IF_CONFIG_SMALL("Generate motion vectors."),
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.priv_size = sizeof(MEContext),
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.priv_class = &mestimate_class,
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.uninit = uninit,
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.query_formats = query_formats,
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.inputs = mestimate_inputs,
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.outputs = mestimate_outputs,
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};
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