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-rw-r--r--libavfilter/vf_mestimate.c377
1 files changed, 377 insertions, 0 deletions
diff --git a/libavfilter/vf_mestimate.c b/libavfilter/vf_mestimate.c
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+++ b/libavfilter/vf_mestimate.c
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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/avassert.h"
+#include "libavutil/common.h"
+#include "libavutil/imgutils.h"
+#include "libavutil/opt.h"
+#include "libavutil/pixdesc.h"
+#include "libavutil/motion_vector.h"
+#include "avfilter.h"
+#include "formats.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, unit) { name, help, 0, AV_OPT_TYPE_CONST, {.i64=val}, 0, 0, FLAGS, unit }
+
+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, "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 int query_formats(AVFilterContext *ctx)
+{
+ 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
+ };
+
+ AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
+ if (!fmts_list)
+ return AVERROR(ENOMEM);
+ return ff_set_common_formats(ctx, fmts_list);
+}
+
+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;
+
+ for (i = 0; i < 3; i++) {
+ s->mv_table[i] = av_mallocz_array(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,
+ },
+ { NULL }
+};
+
+static const AVFilterPad mestimate_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ },
+ { NULL }
+};
+
+AVFilter ff_vf_mestimate = {
+ .name = "mestimate",
+ .description = NULL_IF_CONFIG_SMALL("Generate motion vectors."),
+ .priv_size = sizeof(MEContext),
+ .priv_class = &mestimate_class,
+ .uninit = uninit,
+ .query_formats = query_formats,
+ .inputs = mestimate_inputs,
+ .outputs = mestimate_outputs,
+};
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-02 01:41:16 +0000