[FFmpeg-devel] [PATCH] avfilter: add maskfun filter
Paul B Mahol
onemda at gmail.com
Mon Nov 19 15:46:08 EET 2018
Signed-off-by: Paul B Mahol <onemda at gmail.com>
---
doc/filters.texi | 27 ++++
libavfilter/Makefile | 1 +
libavfilter/allfilters.c | 1 +
libavfilter/vf_maskfun.c | 279 +++++++++++++++++++++++++++++++++++++++
4 files changed, 308 insertions(+)
create mode 100644 libavfilter/vf_maskfun.c
diff --git a/doc/filters.texi b/doc/filters.texi
index a697d3db14..0cbd2ac69c 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -11808,6 +11808,33 @@ copied from first stream.
By default value 0xf, all planes will be processed.
@end table
+ at section maskfun
+Create mask from input video.
+
+For example it is useful to create motion masks after @code{tblend} filter.
+
+This filter accepts the following options:
+
+ at table @option
+ at item low
+Set low threshold. Any pixel component lower or exact than this value will be set to 0.
+
+ at item high
+Set high threshold. Any pixel component higher than this value will be set to max value
+allowed for current pixel format.
+
+ at item planes
+Set planes to filter, by default all available planes are filtered.
+
+ at item fill
+Fill all frame pixels with this value.
+
+ at item sum
+Set max average pixel value for frame. If sum of all pixel components is higher that this
+average, output frame will be completely filled with value set by @var{fill} option.
+Typically useful for scene changes when used in combination with @code{tblend} filter.
+ at end table
+
@section mcdeint
Apply motion-compensation deinterlacing.
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index 6058fb97bc..fe2f42e360 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -277,6 +277,7 @@ OBJS-$(CONFIG_LUTRGB_FILTER) += vf_lut.o
OBJS-$(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-$(CONFIG_MASKFUN_FILTER) += vf_maskfun.o
OBJS-$(CONFIG_MCDEINT_FILTER) += vf_mcdeint.o
OBJS-$(CONFIG_MERGEPLANES_FILTER) += vf_mergeplanes.o framesync.o
OBJS-$(CONFIG_MESTIMATE_FILTER) += vf_mestimate.o motion_estimation.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index 8dfa572fde..7cd2f187fe 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -263,6 +263,7 @@ extern AVFilter ff_vf_lutrgb;
extern AVFilter ff_vf_lutyuv;
extern AVFilter ff_vf_maskedclamp;
extern AVFilter ff_vf_maskedmerge;
+extern AVFilter ff_vf_maskfun;
extern AVFilter ff_vf_mcdeint;
extern AVFilter ff_vf_mergeplanes;
extern AVFilter ff_vf_mestimate;
diff --git a/libavfilter/vf_maskfun.c b/libavfilter/vf_maskfun.c
new file mode 100644
index 0000000000..a8c6466d22
--- /dev/null
+++ b/libavfilter/vf_maskfun.c
@@ -0,0 +1,279 @@
+/*
+ * Copyright (c) 2018 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/imgutils.h"
+#include "libavutil/pixdesc.h"
+#include "libavutil/opt.h"
+#include "avfilter.h"
+#include "formats.h"
+#include "internal.h"
+#include "video.h"
+
+typedef struct MaskFunContext {
+ const AVClass *class;
+
+ int low, high;
+ int planes;
+ int fill;
+ int sum;
+
+ int linesize[4];
+ int width[4], height[4];
+ int nb_planes;
+ int depth;
+ int max;
+ uint64_t max_sum;
+
+ AVFrame *empty;
+ int (*getsum)(AVFilterContext *ctx, AVFrame *out);
+ int (*maskfun)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
+} MaskFunContext;
+
+#define OFFSET(x) offsetof(MaskFunContext, x)
+#define VF AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
+
+static const AVOption maskfun_options[] = {
+ { "low", "set low threshold", OFFSET(low), AV_OPT_TYPE_INT, {.i64=10}, 0, UINT16_MAX, VF },
+ { "high", "set high threshold", OFFSET(high), AV_OPT_TYPE_INT, {.i64=10}, 0, UINT16_MAX, VF },
+ { "planes", "set planes", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=0xF}, 0, 0xF, VF },
+ { "fill", "set fill value", OFFSET(fill), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, VF },
+ { "sum", "set sum value", OFFSET(sum), AV_OPT_TYPE_INT, {.i64=10}, 0, UINT16_MAX, VF },
+ { NULL }
+};
+
+AVFILTER_DEFINE_CLASS(maskfun);
+
+static int query_formats(AVFilterContext *ctx)
+{
+ static const enum AVPixelFormat pix_fmts[] = {
+ AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P,
+ AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
+ AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUV420P,
+ AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
+ AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
+ AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
+ AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
+ AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
+ AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
+ AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
+ AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
+ AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
+ AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
+ AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
+ AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
+ AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
+ AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16,
+ AV_PIX_FMT_NONE
+ };
+
+ return ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
+}
+
+static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
+{
+ AVFilterContext *ctx = inlink->dst;
+ MaskFunContext *s = ctx->priv;
+ AVFilterLink *outlink = ctx->outputs[0];
+
+ if (s->getsum(ctx, frame)) {
+ AVFrame *out = av_frame_clone(s->empty);
+
+ if (!out) {
+ av_frame_free(&frame);
+ return AVERROR(ENOMEM);
+ }
+ out->pts = frame->pts;
+ av_frame_free(&frame);
+
+ return ff_filter_frame(outlink, out);
+ }
+
+ ctx->internal->execute(ctx, s->maskfun, frame, NULL,
+ FFMIN(s->height[1], ff_filter_get_nb_threads(ctx)));
+
+ return ff_filter_frame(outlink, frame);
+}
+
+#define GETSUM(name, type, div) \
+static int getsum##name(AVFilterContext *ctx, AVFrame *out) \
+{ \
+ MaskFunContext *s = ctx->priv; \
+ uint64_t sum = 0; \
+ int p; \
+ \
+ for (p = 0; p < s->nb_planes; p++) { \
+ const int linesize = out->linesize[p] / div; \
+ const int w = s->width[p]; \
+ const int h = s->height[p]; \
+ type *dst = (type *)out->data[p]; \
+ \
+ if (!((1 << p) & s->planes)) \
+ continue; \
+ \
+ for (int y = 0; y < h; y++) { \
+ for (int x = 0; x < w; x++) \
+ sum += dst[x]; \
+ if (sum >= s->max_sum) \
+ return 1; \
+ dst += linesize; \
+ } \
+ } \
+ \
+ return 0; \
+}
+
+GETSUM(8, uint8_t, 1)
+GETSUM(16, uint16_t, 2)
+
+#define MASKFUN(name, type, div) \
+static int maskfun##name(AVFilterContext *ctx, void *arg, \
+ int jobnr, int nb_jobs) \
+{ \
+ MaskFunContext *s = ctx->priv; \
+ AVFrame *out = arg; \
+ const int low = s->low; \
+ const int high = s->high; \
+ const int max = s->max; \
+ int p; \
+ \
+ for (p = 0; p < s->nb_planes; p++) { \
+ const int linesize = out->linesize[p] / div; \
+ const int w = s->width[p]; \
+ const int h = s->height[p]; \
+ const int slice_start = (h * jobnr) / nb_jobs; \
+ const int slice_end = (h * (jobnr+1)) / nb_jobs; \
+ type *dst = (type *)out->data[p] + slice_start * linesize; \
+ \
+ if (!((1 << p) & s->planes)) \
+ continue; \
+ \
+ for (int y = slice_start; y < slice_end; y++) { \
+ for (int x = 0; x < w; x++) { \
+ if (dst[x] <= low) \
+ dst[x] = 0; \
+ else if (dst[x] > high) \
+ dst[x] = max; \
+ } \
+ \
+ dst += linesize; \
+ } \
+ } \
+ \
+ return 0; \
+}
+
+MASKFUN(8, uint8_t, 1)
+MASKFUN(16, uint16_t, 2)
+
+static int config_input(AVFilterLink *inlink)
+{
+ AVFilterContext *ctx = inlink->dst;
+ MaskFunContext *s = ctx->priv;
+ const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
+ int vsub, hsub, ret;
+
+ s->nb_planes = av_pix_fmt_count_planes(inlink->format);
+
+ if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
+ return ret;
+
+ hsub = desc->log2_chroma_w;
+ vsub = desc->log2_chroma_h;
+ s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, vsub);
+ s->height[0] = s->height[3] = inlink->h;
+ s->width[1] = s->width[2] = AV_CEIL_RSHIFT(inlink->w, hsub);
+ s->width[0] = s->width[3] = inlink->w;
+
+ s->depth = desc->comp[0].depth;
+ s->max = (1 << s->depth) - 1;
+ s->fill = FFMIN(s->fill, s->max);
+
+ if (s->depth == 8) {
+ s->maskfun = maskfun8;
+ s->getsum = getsum8;
+ } else {
+ s->maskfun = maskfun16;
+ s->getsum = getsum16;
+ }
+
+ s->empty = ff_get_video_buffer(inlink, inlink->w, inlink->h);
+ if (!s->empty)
+ return AVERROR(ENOMEM);
+
+ if (s->depth == 8) {
+ for (int p = 0; p < s->nb_planes; p++) {
+ uint8_t *dst = s->empty->data[p];
+
+ for (int y = 0; y < s->height[p]; y++) {
+ memset(dst, s->fill, s->width[p]);
+ dst += s->empty->linesize[p];
+ }
+ }
+ } else {
+ for (int p = 0; p < s->nb_planes; p++) {
+ uint16_t *dst = (uint16_t *)s->empty->data[p];
+
+ for (int y = 0; y < s->height[p]; y++) {
+ for (int x = 0; x < s->width[p]; x++)
+ dst[x] = s->fill;
+ dst += s->empty->linesize[p] / 2;
+ }
+ }
+ }
+
+ s->max_sum = 0;
+ for (int p = 0; p < s->nb_planes; p++) {
+ if (!((1 << p) & s->planes))
+ continue;
+ s->max_sum += (uint64_t)s->sum * s->width[p] * s->height[p];
+ }
+
+ return 0;
+}
+
+static const AVFilterPad maskfun_inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .filter_frame = filter_frame,
+ .config_props = config_input,
+ .needs_writable = 1,
+ },
+ { NULL }
+};
+
+static const AVFilterPad maskfun_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ },
+ { NULL }
+};
+
+AVFilter ff_vf_maskfun = {
+ .name = "maskfun",
+ .description = NULL_IF_CONFIG_SMALL("Create Mask."),
+ .priv_size = sizeof(MaskFunContext),
+ .query_formats = query_formats,
+ .inputs = maskfun_inputs,
+ .outputs = maskfun_outputs,
+ .priv_class = &maskfun_class,
+ .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
+};
--
2.17.1
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