[FFmpeg-devel] [PATCH] avfilter: add mcompensate filter
Paul B Mahol
onemda at gmail.com
Sun Nov 18 00:54:05 EET 2018
Signed-off-by: Paul B Mahol <onemda at gmail.com>
---
Works only after mestimate or when motion vectors are exported.
---
libavfilter/Makefile | 1 +
libavfilter/allfilters.c | 1 +
libavfilter/vf_mcompensate.c | 173 +++++++++++++++++++++++++++++++++++
3 files changed, 175 insertions(+)
create mode 100644 libavfilter/vf_mcompensate.c
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index 6058fb97bc..8a3fc541d2 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -278,6 +278,7 @@ OBJS-$(CONFIG_LUTYUV_FILTER) += vf_lut.o
OBJS-$(CONFIG_MASKEDCLAMP_FILTER) += vf_maskedclamp.o framesync.o
OBJS-$(CONFIG_MASKEDMERGE_FILTER) += vf_maskedmerge.o framesync.o
OBJS-$(CONFIG_MCDEINT_FILTER) += vf_mcdeint.o
+OBJS-$(CONFIG_MCOMPENSATE_FILTER) += vf_mcompensate.o
OBJS-$(CONFIG_MERGEPLANES_FILTER) += vf_mergeplanes.o framesync.o
OBJS-$(CONFIG_MESTIMATE_FILTER) += vf_mestimate.o motion_estimation.o
OBJS-$(CONFIG_METADATA_FILTER) += f_metadata.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index 8dfa572fde..35afafb364 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -264,6 +264,7 @@ extern AVFilter ff_vf_lutyuv;
extern AVFilter ff_vf_maskedclamp;
extern AVFilter ff_vf_maskedmerge;
extern AVFilter ff_vf_mcdeint;
+extern AVFilter ff_vf_mcompensate;
extern AVFilter ff_vf_mergeplanes;
extern AVFilter ff_vf_mestimate;
extern AVFilter ff_vf_metadata;
diff --git a/libavfilter/vf_mcompensate.c b/libavfilter/vf_mcompensate.c
new file mode 100644
index 0000000000..3fc2ca3947
--- /dev/null
+++ b/libavfilter/vf_mcompensate.c
@@ -0,0 +1,173 @@
+/*
+ * 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 MCContext {
+ const AVClass *class;
+ int direction;
+
+ int width[4], height[4];
+ int hsub, vsub;
+ int nb_planes;
+ int depth;
+} MCContext;
+
+#define OFFSET(x) offsetof(MCContext, 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 mcompensate_options[] = {
+ { "dir", "set compensate direction", OFFSET(direction), AV_OPT_TYPE_INT, {.i64=0}, -1, 1, FLAGS, "dir" },
+ { "forward", 0, 0, AV_OPT_TYPE_CONST, {.i64= 1}, .unit = "dir" },
+ { "backward", 0, 0, AV_OPT_TYPE_CONST, {.i64=-1}, .unit = "dir" },
+ { NULL }
+};
+
+AVFILTER_DEFINE_CLASS(mcompensate);
+
+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)
+{
+ AVFilterContext *ctx = inlink->dst;
+ MCContext *s = ctx->priv;
+ const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
+
+ s->nb_planes = av_pix_fmt_count_planes(inlink->format);
+
+ s->hsub = desc->log2_chroma_w;
+ s->vsub = desc->log2_chroma_h;
+ s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, s->vsub);
+ s->height[0] = s->height[3] = inlink->h;
+ s->width[1] = s->width[2] = AV_CEIL_RSHIFT(inlink->w, s->hsub);
+ s->width[0] = s->width[3] = inlink->w;
+
+ s->depth = desc->comp[0].depth;
+
+ return 0;
+}
+
+static int filter_frame(AVFilterLink *inlink, AVFrame *in)
+{
+ AVFilterContext *ctx = inlink->dst;
+ AVFilterLink *outlink = ctx->outputs[0];
+ MCContext *s = ctx->priv;
+ AVFrameSideData *sd;
+ AVFrame *out = ff_get_video_buffer(outlink, in->width, in->height);
+
+ if (!out) {
+ av_frame_free(&in);
+ return AVERROR(ENOMEM);
+ }
+ av_frame_copy_props(out, in);
+ av_frame_copy(out, in);
+ sd = av_frame_get_side_data(in, AV_FRAME_DATA_MOTION_VECTORS);
+ if (sd) {
+ const AVMotionVector *mvs = (const AVMotionVector *)sd->data;
+
+ for (int i = 0; i < sd->size / sizeof(*mvs); i++) {
+ const AVMotionVector *mv = &mvs[i];
+ const int direction = mv->source;
+ int w = mv->w, h = mv->h;
+ int sy, sx, dy, dx;
+
+ if (mv->src_y == mv->dst_y && mv->src_x == mv->dst_x)
+ continue;
+
+ sy = av_clip(mv->src_y, 0, inlink->h - h - 1);
+ sx = av_clip(mv->src_x, 0, inlink->w - w - 1);
+ dy = av_clip(mv->dst_y, 0, inlink->h - h - 1);
+ dx = av_clip(mv->dst_x, 0, inlink->w - w - 1);
+
+ if (direction == s->direction) {
+ for (int p = 0; p < s->nb_planes; p++) {
+ const int vsub = p ? s->vsub : 0;
+ const int hsub = p ? s->hsub : 0;
+ const uint8_t *src = in->data[p];
+ uint8_t *dst = out->data[p];
+
+ av_image_copy_plane(dst + (dy >> vsub) * out->linesize[p] + (dx >> hsub),
+ out->linesize[p],
+ src + (sy >> vsub) * in->linesize[p] + (sx >> hsub),
+ in->linesize[p],
+ w >> hsub, h >> vsub);
+ }
+ }
+ }
+ }
+ av_frame_free(&in);
+ return ff_filter_frame(outlink, out);
+}
+
+static const AVFilterPad inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .filter_frame = filter_frame,
+ .config_props = config_input,
+ },
+ { NULL }
+};
+
+static const AVFilterPad outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ },
+ { NULL }
+};
+
+AVFilter ff_vf_mcompensate = {
+ .name = "mcompensate",
+ .description = NULL_IF_CONFIG_SMALL("Motion compensate frames."),
+ .priv_size = sizeof(MCContext),
+ .priv_class = &mcompensate_class,
+ .query_formats = query_formats,
+ .inputs = inputs,
+ .outputs = outputs,
+};
--
2.17.1
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