From b2ec4edef798af1112ed7c3aadc3a2c91f7d3665 Mon Sep 17 00:00:00 2001 From: Paul B Mahol Date: Mon, 20 Sep 2021 13:47:45 +0200 Subject: [PATCH] avfilter: add morpho filter --- Changelog | 1 + doc/filters.texi | 39 ++ libavfilter/Makefile | 1 + libavfilter/allfilters.c | 1 + libavfilter/version.h | 2 +- libavfilter/vf_morpho.c | 939 +++++++++++++++++++++++++++++++++++++++ 6 files changed, 982 insertions(+), 1 deletion(-) create mode 100644 libavfilter/vf_morpho.c diff --git a/Changelog b/Changelog index d0b1a9724e..78662416a4 100644 --- a/Changelog +++ b/Changelog @@ -20,6 +20,7 @@ version : - MSN Siren decoder - scharr video filter - apsyclip audio filter +- morpho video filter version 4.4: diff --git a/doc/filters.texi b/doc/filters.texi index 0b7e21f7f8..568c2995bc 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -10257,6 +10257,7 @@ A number representing position of the first frame with respect to the telecine pattern. This is to be used if the stream is cut. The default value is @code{0}. @end table +@anchor{dilation} @section dilation Apply dilation effect to the video. @@ -11577,6 +11578,7 @@ value. @end table +@anchor{erosion} @section erosion Apply erosion effect to the video. @@ -15352,6 +15354,43 @@ Default value is 0. This filter supports the all above options as @ref{commands}. +@section morpho + +This filter allows to apply main morphological grayscale transforms, +erode and dilate with arbitrary structures set in second input stream. + +Unlike naive implementation and much slower performance in @ref{erosion} +and @ref{dilation} filters, when speed is critical @code{morpho} filter +should be used instead. + +A description of accepted options follows, + +@table @option +@item mode +Set morphological transform to apply, can be: + +@table @samp +@item erode +@item dilate +@item open +@item close +@end table +Default is @code{erode}. + +@item planes +Set planes to filter, by default all planes except alpha are filtered. + +@item structure +Set which structure video frames will be processed from second input stream, +can be @var{first} or @var{all}. Default is @var{all}. +@end table + +The @code{morpho} filter also supports the @ref{framesync} options. + +@subsection Commands + +This filter supports same @ref{commands} as options. + @section mpdecimate Drop frames that do not differ greatly from the previous frame in diff --git a/libavfilter/Makefile b/libavfilter/Makefile index f059f3fef8..fa2d18e45f 100644 --- a/libavfilter/Makefile +++ b/libavfilter/Makefile @@ -344,6 +344,7 @@ OBJS-$(CONFIG_MIDEQUALIZER_FILTER) += vf_midequalizer.o framesync.o OBJS-$(CONFIG_MINTERPOLATE_FILTER) += vf_minterpolate.o motion_estimation.o OBJS-$(CONFIG_MIX_FILTER) += vf_mix.o framesync.o OBJS-$(CONFIG_MONOCHROME_FILTER) += vf_monochrome.o +OBJS-$(CONFIG_MORPHO_FILTER) += vf_morpho.o OBJS-$(CONFIG_MPDECIMATE_FILTER) += vf_mpdecimate.o OBJS-$(CONFIG_NEGATE_FILTER) += vf_lut.o OBJS-$(CONFIG_NLMEANS_FILTER) += vf_nlmeans.o diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c index ddd6404228..338561a446 100644 --- a/libavfilter/allfilters.c +++ b/libavfilter/allfilters.c @@ -329,6 +329,7 @@ extern const AVFilter ff_vf_midequalizer; extern const AVFilter ff_vf_minterpolate; extern const AVFilter ff_vf_mix; extern const AVFilter ff_vf_monochrome; +extern const AVFilter ff_vf_morpho; extern const AVFilter ff_vf_mpdecimate; extern const AVFilter ff_vf_msad; extern const AVFilter ff_vf_negate; diff --git a/libavfilter/version.h b/libavfilter/version.h index 24b59acde6..ab5eb14634 100644 --- a/libavfilter/version.h +++ b/libavfilter/version.h @@ -30,7 +30,7 @@ #include "libavutil/version.h" #define LIBAVFILTER_VERSION_MAJOR 8 -#define LIBAVFILTER_VERSION_MINOR 9 +#define LIBAVFILTER_VERSION_MINOR 10 #define LIBAVFILTER_VERSION_MICRO 100 diff --git a/libavfilter/vf_morpho.c b/libavfilter/vf_morpho.c new file mode 100644 index 0000000000..fd181ddaa5 --- /dev/null +++ b/libavfilter/vf_morpho.c @@ -0,0 +1,939 @@ +/* + * Copyright (c) 2016 ReneBrals + * Copyright (c) 2021 Paul B Mahol + * + * This file is part of FFmpeg. + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include "libavutil/avassert.h" +#include "libavutil/imgutils.h" +#include "libavutil/intreadwrite.h" +#include "libavutil/opt.h" +#include "libavutil/pixdesc.h" +#include "avfilter.h" +#include "formats.h" +#include "framesync.h" +#include "internal.h" +#include "video.h" + +enum MorphModes { + ERODE, + DILATE, + OPEN, + CLOSE, + NB_MODES +}; + +typedef struct IPlane { + uint8_t **img; + int w, h; + int range; + int depth; + int type_size; + + void (*max)(uint8_t *c, const uint8_t *a, const uint8_t *b, int x); + void (*min)(uint8_t *c, const uint8_t *a, const uint8_t *b, int x); + void (*max_in_place)(uint8_t *a, const uint8_t *b, int x); + void (*min_in_place)(uint8_t *a, const uint8_t *b, int x); +} IPlane; + +typedef struct LUT { + uint8_t ***arr; + int min_r; + int max_r; + int I; + int X; + int pre_pad_x; + int type_size; +} LUT; + +typedef struct chord { + int x; + int y; + int l; + int i; +} chord; + +typedef struct chord_set { + chord *C; + int size; + int cap; + + int *R; + int Lnum; + + int minX; + int maxX; + int minY; + int maxY; + unsigned nb_elements; +} chord_set; + +typedef struct MorphoContext { + const AVClass *class; + FFFrameSync fs; + + chord_set SE[4]; + IPlane SEimg[4]; + IPlane g[4], f[4], h[4]; + LUT Ty[2][4]; + + int mode; + int planes; + int structures; + + int planewidth[4]; + int planeheight[4]; + int splanewidth[4]; + int splaneheight[4]; + int depth; + int type_size; + int nb_planes; + + int got_structure[4]; + + AVFrame *temp; + + int64_t *plane_f, *plane_g; +} MorphoContext; + +#define OFFSET(x) offsetof(MorphoContext, x) +#define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_RUNTIME_PARAM + +static const AVOption morpho_options[] = { + { "mode", "set morphological transform", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=0}, 0, NB_MODES-1, FLAGS, "mode" }, + { "erode", NULL, 0, AV_OPT_TYPE_CONST, {.i64=ERODE}, 0, 0, FLAGS, "mode" }, + { "dilate", NULL, 0, AV_OPT_TYPE_CONST, {.i64=DILATE}, 0, 0, FLAGS, "mode" }, + { "open", NULL, 0, AV_OPT_TYPE_CONST, {.i64=OPEN}, 0, 0, FLAGS, "mode" }, + { "close", NULL, 0, AV_OPT_TYPE_CONST, {.i64=CLOSE}, 0, 0, FLAGS, "mode" }, + { "planes", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=7}, 0, 15, FLAGS }, + { "structure", "when to process structures", OFFSET(structures), AV_OPT_TYPE_INT, {.i64=1}, 0, 1, FLAGS, "str" }, + { "first", "process only first structure, ignore rest", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "str" }, + { "all", "process all structure", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "str" }, + { NULL } +}; + +FRAMESYNC_DEFINE_CLASS(morpho, MorphoContext, fs); + +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_GBRP, AV_PIX_FMT_GBRAP, AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, + AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9, AV_PIX_FMT_GBRP9, + AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9, + 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_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10, + AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12, + AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16, + AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16, + AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16, + 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_from_list(ctx, pix_fmts); +} + +static void min_fun(uint8_t *c, const uint8_t *a, const uint8_t *b, int x) +{ + for (int i = 0; i < x; i++) + c[i] = FFMIN(b[i], a[i]); +} + +static void mininplace_fun(uint8_t *a, const uint8_t *b, int x) +{ + for (int i = 0; i < x; i++) + a[i] = FFMIN(a[i], b[i]); +} + +static void max_fun(uint8_t *c, const uint8_t *a, const uint8_t *b, int x) +{ + for (int i = 0; i < x; i++) + c[i] = FFMAX(a[i], b[i]); +} + +static void maxinplace_fun(uint8_t *a, const uint8_t *b, int x) +{ + for (int i = 0; i < x; i++) + a[i] = FFMAX(a[i], b[i]); +} + +static void min16_fun(uint8_t *cc, const uint8_t *aa, const uint8_t *bb, int x) +{ + const uint16_t *a = (const uint16_t *)aa; + const uint16_t *b = (const uint16_t *)bb; + uint16_t *c = (uint16_t *)cc; + + for (int i = 0; i < x; i++) + c[i] = FFMIN(b[i], a[i]); +} + +static void mininplace16_fun(uint8_t *aa, const uint8_t *bb, int x) +{ + uint16_t *a = (uint16_t *)aa; + const uint16_t *b = (const uint16_t *)bb; + + for (int i = 0; i < x; i++) + a[i] = FFMIN(a[i], b[i]); +} + +static void max16_fun(uint8_t *cc, const uint8_t *aa, const uint8_t *bb, int x) +{ + const uint16_t *a = (const uint16_t *)aa; + const uint16_t *b = (const uint16_t *)bb; + uint16_t *c = (uint16_t *)cc; + + for (int i = 0; i < x; i++) + c[i] = FFMAX(a[i], b[i]); +} + +static void maxinplace16_fun(uint8_t *aa, const uint8_t *bb, int x) +{ + uint16_t *a = (uint16_t *)aa; + const uint16_t *b = (const uint16_t *)bb; + + for (int i = 0; i < x; i++) + a[i] = FFMAX(a[i], b[i]); +} + +static int alloc_lut(LUT *Ty, chord_set *SE, int type_size, int mode) +{ + const int size = Ty->max_r + 1 - Ty->min_r; + int pre_pad_x = 0; + + if (SE->minX < 0) + pre_pad_x = 0 - SE->minX; + Ty->pre_pad_x = pre_pad_x; + Ty->type_size = type_size; + + Ty->arr = av_calloc(size, sizeof(*Ty->arr)); + if (!Ty->arr) + return AVERROR(ENOMEM); + for (int r = 0; r < Ty->max_r - Ty->min_r + 1; r++) { + Ty->arr[r] = av_calloc(Ty->I, sizeof(uint8_t *)); + if (!Ty->arr[r]) + return AVERROR(ENOMEM); + for (int i = 0; i < Ty->I; i++) { + Ty->arr[r][i] = av_calloc(Ty->X + pre_pad_x, type_size); + if (!Ty->arr[r][i]) + return AVERROR(ENOMEM); + if (mode == ERODE) + memset(Ty->arr[r][i], UINT8_MAX, pre_pad_x * type_size); + /* Shifting the X index such that negative indices correspond to + * the pre-padding. + */ + Ty->arr[r][i] = &(Ty->arr[r][i][pre_pad_x * type_size]); + } + } + + Ty->arr = &(Ty->arr[0 - Ty->min_r]); + + return 0; +} + +static void free_lut(LUT *table) +{ + uint8_t ***rp; + + if (!table->arr) + return; + + // The R index was shifted, create a pointer to the original array + rp = &(table->arr[table->min_r]); + + for (int r = table->min_r; r <= table->max_r; r++) { + for (int i = 0; i < table->I; i++) { + // The X index was also shifted, for padding purposes. + av_free(table->arr[r][i] - table->pre_pad_x * table->type_size); + } + av_freep(&table->arr[r]); + } + av_freep(&rp); +} + +static void circular_swap(LUT *Ty) +{ + /* + * Swap the pointers to r-indices in a circle. This is useful because + * Ty(r,i,x) = Ty-1(r+1,i,x) for r < ymax. + */ + if (Ty->max_r - Ty->min_r > 0) { + uint8_t **Ty0 = Ty->arr[Ty->min_r]; + + for (int r = Ty->min_r; r < Ty->max_r; r++) + Ty->arr[r] = Ty->arr[r + 1]; + + Ty->arr[Ty->max_r] = Ty0; + } +} + +static void compute_min_row(IPlane *f, LUT *Ty, chord_set *SE, int r, int y) +{ + if (y + r >= 0 && y + r < f->h) { + memcpy(Ty->arr[r][0], f->img[y + r], Ty->X * Ty->type_size); + } else { + memset(Ty->arr[r][0], UINT8_MAX, Ty->X * Ty->type_size); + } + + for (int i = 1; i < SE->Lnum; i++) { + int d = SE->R[i] - SE->R[i - 1]; + + f->min(Ty->arr[r][i] - Ty->pre_pad_x * f->type_size, + Ty->arr[r][i - 1] - Ty->pre_pad_x * f->type_size, + Ty->arr[r][i - 1] + (d - Ty->pre_pad_x) * f->type_size, + Ty->X + Ty->pre_pad_x - d); + memcpy(Ty->arr[r][i] + (Ty->X - d) * f->type_size, + Ty->arr[r][i - 1] + (Ty->X - d) * f->type_size, + d * f->type_size); + } +} + +static void update_min_lut(IPlane *f, LUT *Ty, chord_set *SE, int y, int tid, int num) +{ + for (int i = 0; i < num; i++) + circular_swap(Ty); + + compute_min_row(f, Ty, SE, Ty->max_r - tid, y); +} + +static int compute_min_lut(LUT *Ty, IPlane *f, chord_set *SE, int y, int num) +{ + if (Ty->I != SE->Lnum || + Ty->X != f->w || + Ty->min_r != SE->minY || + Ty->max_r != SE->maxY + num - 1) { + int ret; + + free_lut(Ty); + + Ty->I = SE->Lnum; + Ty->X = f->w; + Ty->min_r = SE->minY; + Ty->max_r = SE->maxY + num - 1; + ret = alloc_lut(Ty, SE, f->type_size, ERODE); + if (ret < 0) + return ret; + } + + for (int r = Ty->min_r; r <= Ty->max_r; r++) + compute_min_row(f, Ty, SE, r, y); + + return 0; +} + +static void compute_max_row(IPlane *f, LUT *Ty, chord_set *SE, int r, int y) +{ + if (y + r >= 0 && y + r < f->h) { + memcpy(Ty->arr[r][0], f->img[y + r], Ty->X * Ty->type_size); + } else { + memset(Ty->arr[r][0], 0, Ty->X * Ty->type_size); + } + + for (int i = 1; i < SE->Lnum; i++) { + int d = SE->R[i] - SE->R[i - 1]; + + f->max(Ty->arr[r][i] - Ty->pre_pad_x * f->type_size, + Ty->arr[r][i - 1] - Ty->pre_pad_x * f->type_size, + Ty->arr[r][i - 1] + (d - Ty->pre_pad_x) * f->type_size, + Ty->X + Ty->pre_pad_x - d); + memcpy(Ty->arr[r][i] + (Ty->X - d) * f->type_size, + Ty->arr[r][i - 1] + (Ty->X - d) * f->type_size, + d * f->type_size); + } +} + +static void update_max_lut(IPlane *f, LUT *Ty, chord_set *SE, int y, int tid, int num) +{ + for (int i = 0; i < num; i++) + circular_swap(Ty); + + compute_max_row(f, Ty, SE, Ty->max_r - tid, y); +} + +static int compute_max_lut(LUT *Ty, IPlane *f, chord_set *SE, int y, int num) +{ + if (Ty->I != SE->Lnum || + Ty->X != f->w || + Ty->min_r != SE->minY || + Ty->max_r != SE->maxY + num - 1) { + int ret; + + free_lut(Ty); + + Ty->I = SE->Lnum; + Ty->X = f->w; + Ty->min_r = SE->minY; + Ty->max_r = SE->maxY + num - 1; + ret = alloc_lut(Ty, SE, f->type_size, DILATE); + if (ret < 0) + return ret; + } + + for (int r = Ty->min_r; r <= Ty->max_r; r++) + compute_max_row(f, Ty, SE, r, y); + + return 0; +} + +static void line_dilate(IPlane *g, LUT *Ty, chord_set *SE, int y, int tid) +{ + memset(g->img[y], 0, g->w * g->type_size); + + for (int c = 0; c < SE->size; c++) { + g->max_in_place(g->img[y], + Ty->arr[SE->C[c].y + tid][SE->C[c].i] + SE->C[c].x * Ty->type_size, + av_clip(g->w - SE->C[c].x, 0, g->w)); + } +} + +static void line_erode(IPlane *g, LUT *Ty, chord_set *SE, int y, int tid) +{ + memset(g->img[y], UINT8_MAX, g->w * g->type_size); + + for (int c = 0; c < SE->size; c++) { + g->min_in_place(g->img[y], + Ty->arr[SE->C[c].y + tid][SE->C[c].i] + SE->C[c].x * Ty->type_size, + av_clip(g->w - SE->C[c].x, 0, g->w)); + } +} + +static int dilate(IPlane *g, IPlane *f, chord_set *SE, LUT *Ty) +{ + int ret = compute_max_lut(Ty, f, SE, 0, 1); + if (ret < 0) + return ret; + + line_dilate(g, Ty, SE, 0, 0); + for (int y = 1; y < f->h; y++) { + update_max_lut(f, Ty, SE, y, 0, 1); + line_dilate(g, Ty, SE, y, 0); + } + + return 0; +} + +static int erode(IPlane *g, IPlane *f, chord_set *SE, LUT *Ty) +{ + int ret = compute_min_lut(Ty, f, SE, 0, 1); + if (ret < 0) + return ret; + + line_erode(g, Ty, SE, 0, 0); + for (int y = 1; y < f->h; y++) { + update_min_lut(f, Ty, SE, y, 0, 1); + line_erode(g, Ty, SE, y, 0); + } + + return 0; +} + +static int insert_chord_set(chord_set *chords, chord c) +{ + // Checking if chord fits in dynamic array, resize if not. + if (chords->size == chords->cap) { + chords->C = av_realloc_f(chords->C, chords->cap * 2, sizeof(chord)); + if (!chords->C) + return AVERROR(ENOMEM); + chords->cap *= 2; + } + + // Add the chord to the dynamic array. + chords->C[chords->size].x = c.x; + chords->C[chords->size].y = c.y; + chords->C[chords->size++].l = c.l; + + // Update minimum/maximum x/y offsets of the chord set. + chords->minX = FFMIN(chords->minX, c.x); + chords->maxX = FFMAX(chords->maxX, c.x); + + chords->minY = FFMIN(chords->minY, c.y); + chords->maxY = FFMAX(chords->maxY, c.y); + + return 0; +} + +static void free_chord_set(chord_set *SE) +{ + av_freep(&SE->C); + SE->size = 0; + SE->cap = 0; + + av_freep(&SE->R); + SE->Lnum = 0; +} + +static int init_chordset(chord_set *chords) +{ + chords->nb_elements = 0; + chords->size = 0; + chords->C = av_calloc(1, sizeof(chord)); + if (!chords->C) + return AVERROR(ENOMEM); + + chords->cap = 1; + chords->minX = INT16_MAX; + chords->maxX = INT16_MIN; + chords->minY = INT16_MAX; + chords->maxY = INT16_MIN; + + return 0; +} + +static int comp_chord_length(const void *p, const void *q) +{ + chord a, b; + a = *((chord *)p); + b = *((chord *)q); + + return (a.l > b.l) - (a.l < b.l); +} + +static int comp_chord(const void *p, const void *q) +{ + chord a, b; + a = *((chord *)p); + b = *((chord *)q); + + return (a.y > b.y) - (a.y < b.y); +} + +static int build_chord_set(IPlane *SE, chord_set *chords) +{ + const int mid = 1 << (SE->depth - 1); + int chord_length_index; + int chord_start, val, ret; + int centerX, centerY; + int r_cap = 1; + chord c; + + ret = init_chordset(chords); + if (ret < 0) + return ret; + /* + * In erosion/dilation, the center of the IPlane has S.E. offset (0,0). + * Otherwise, the resulting IPlane would be shifted to the top-left. + */ + centerX = (SE->w - 1) / 2; + centerY = (SE->h - 1) / 2; + + /* + * Computing the set of chords C. + */ + for (int y = 0; y < SE->h; y++) { + int x; + + chord_start = -1; + for (x = 0; x < SE->w; x++) { + if (SE->type_size == 1) { + chords->nb_elements += (SE->img[y][x] >= mid); + //A chord is a run of non-zero pixels. + if (SE->img[y][x] >= mid && chord_start == -1) { + // Chord starts. + chord_start = x; + } else if (SE->img[y][x] < mid && chord_start != -1) { + // Chord ends before end of line. + c.x = chord_start - centerX; + c.y = y - centerY; + c.l = x - chord_start; + ret = insert_chord_set(chords, c); + if (ret < 0) + return AVERROR(ENOMEM); + chord_start = -1; + } + } else { + chords->nb_elements += (AV_RN16(&SE->img[y][x * 2]) >= mid); + //A chord is a run of non-zero pixels. + if (AV_RN16(&SE->img[y][x * 2]) >= mid && chord_start == -1) { + // Chord starts. + chord_start = x; + } else if (AV_RN16(&SE->img[y][x * 2]) < mid && chord_start != -1) { + // Chord ends before end of line. + c.x = chord_start - centerX; + c.y = y - centerY; + c.l = x - chord_start; + ret = insert_chord_set(chords, c); + if (ret < 0) + return AVERROR(ENOMEM); + chord_start = -1; + } + } + } + if (chord_start != -1) { + // Chord ends at end of line. + c.x = chord_start - centerX; + c.y = y - centerY; + c.l = x - chord_start; + ret = insert_chord_set(chords, c); + if (ret < 0) + return AVERROR(ENOMEM); + } + } + + /* + * Computing the array of chord lengths R(i). + * This is needed because the lookup table will contain a row for each + * length index i. + */ + qsort(chords->C, chords->size, sizeof(chord), comp_chord_length); + chords->R = av_calloc(1, sizeof(*chords->R)); + if (!chords->R) + return AVERROR(ENOMEM); + chords->Lnum = 0; + val = 0; + r_cap = 1; + + if (chords->size > 0) { + val = 1; + if (chords->Lnum >= r_cap) { + chords->R = av_realloc_f(chords->R, r_cap * 2, sizeof(*chords->R)); + if (!chords->R) + return AVERROR(ENOMEM); + r_cap *= 2; + } + chords->R[chords->Lnum++] = 1; + val = 1; + } + + for (int i = 0; i < chords->size; i++) { + if (val != chords->C[i].l) { + while (2 * val < chords->C[i].l && val != 0) { + if (chords->Lnum >= r_cap) { + chords->R = av_realloc_f(chords->R, r_cap * 2, sizeof(*chords->R)); + if (!chords->R) + return AVERROR(ENOMEM); + r_cap *= 2; + } + + chords->R[chords->Lnum++] = 2 * val; + val *= 2; + } + val = chords->C[i].l; + + if (chords->Lnum >= r_cap) { + chords->R = av_realloc_f(chords->R, r_cap * 2, sizeof(*chords->R)); + if (!chords->R) + return AVERROR(ENOMEM); + r_cap *= 2; + } + chords->R[chords->Lnum++] = val; + } + } + + /* + * Setting the length indices of chords. + * These are needed so that the algorithm can, for each chord, + * access the lookup table at the correct length in constant time. + */ + chord_length_index = 0; + for (int i = 0; i < chords->size; i++) { + while (chords->R[chord_length_index] < chords->C[i].l) + chord_length_index++; + chords->C[i].i = chord_length_index; + } + + /* + * Chords are sorted on Y. This way, when a row of the lookup table or IPlane + * is cached, the next chord offset has a better chance of being on the + * same cache line. + */ + qsort(chords->C, chords->size, sizeof(chord), comp_chord); + + return 0; +} + +static void free_iplane(IPlane *imp) +{ + av_freep(&imp->img); +} + +static int read_iplane(IPlane *imp, const uint8_t *dst, int dst_linesize, + int w, int h, int R, int type_size, int depth) +{ + if (!imp->img) + imp->img = av_calloc(h, sizeof(*imp->img)); + if (!imp->img) + return AVERROR(ENOMEM); + + imp->w = w; + imp->h = h; + imp->range = R; + imp->depth = depth; + imp->type_size = type_size; + imp->max = type_size == 1 ? max_fun : max16_fun; + imp->min = type_size == 1 ? min_fun : min16_fun; + imp->max_in_place = type_size == 1 ? maxinplace_fun : maxinplace16_fun; + imp->min_in_place = type_size == 1 ? mininplace_fun : mininplace16_fun; + + for (int y = 0; y < h; y++) + imp->img[y] = (uint8_t *)dst + y * dst_linesize; + + return 0; +} + +static int config_input(AVFilterLink *inlink) +{ + const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); + MorphoContext *s = inlink->dst->priv; + + s->depth = desc->comp[0].depth; + s->type_size = (s->depth + 7) / 8; + s->nb_planes = desc->nb_components; + s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w); + s->planewidth[0] = s->planewidth[3] = inlink->w; + s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h); + s->planeheight[0] = s->planeheight[3] = inlink->h; + + return 0; +} + +static int config_input_structure(AVFilterLink *inlink) +{ + const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); + AVFilterContext *ctx = inlink->dst; + MorphoContext *s = inlink->dst->priv; + + av_assert0(ctx->inputs[0]->format == ctx->inputs[1]->format); + + s->splanewidth[1] = s->splanewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w); + s->splanewidth[0] = s->splanewidth[3] = inlink->w; + s->splaneheight[1] = s->splaneheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h); + s->splaneheight[0] = s->splaneheight[3] = inlink->h; + + return 0; +} + +static int activate(AVFilterContext *ctx) +{ + MorphoContext *s = ctx->priv; + return ff_framesync_activate(&s->fs); +} + +static int do_morpho(FFFrameSync *fs) +{ + AVFilterContext *ctx = fs->parent; + AVFilterLink *outlink = ctx->outputs[0]; + MorphoContext *s = ctx->priv; + AVFrame *in = NULL, *structurepic = NULL; + AVFrame *out; + int ret; + + ret = ff_framesync_dualinput_get(fs, &in, &structurepic); + if (ret < 0) + return ret; + if (!structurepic) + return ff_filter_frame(outlink, in); + + out = ff_get_video_buffer(outlink, outlink->w, outlink->h); + if (!out) { + av_frame_free(&in); + return AVERROR(ENOMEM); + } + av_frame_copy_props(out, in); + + for (int p = 0; p < s->nb_planes; p++) { + const uint8_t *src = in->data[p]; + int src_linesize = in->linesize[p]; + const uint8_t *ssrc = structurepic->data[p]; + const int ssrc_linesize = structurepic->linesize[p]; + uint8_t *dst = out->data[p]; + int dst_linesize = out->linesize[p]; + const int swidth = s->splanewidth[p]; + const int sheight = s->splaneheight[p]; + const int width = s->planewidth[p]; + const int height = s->planeheight[p]; + const int depth = s->depth; + int type_size = s->type_size; + + if (!(s->planes & (1 << p))) { +copy: + av_image_copy_plane(out->data[p] + 0 * out->linesize[p], + out->linesize[p], + in->data[p] + 0 * in->linesize[p], + in->linesize[p], + width * ((s->depth + 7) / 8), + height); + continue; + } + + if (!s->got_structure[p] || s->structures) { + free_chord_set(&s->SE[p]); + + ret = read_iplane(&s->SEimg[p], ssrc, ssrc_linesize, swidth, sheight, 1, type_size, depth); + if (ret < 0) + goto fail; + ret = build_chord_set(&s->SEimg[p], &s->SE[p]); + if (ret < 0) + goto fail; + s->got_structure[p] = 1; + } + + if (s->SE[p].minX == INT16_MAX || + s->SE[p].minY == INT16_MAX || + s->SE[p].maxX == INT16_MIN || + s->SE[p].maxY == INT16_MIN) + goto copy; + + ret = read_iplane(&s->f[p], src, src_linesize, width, height, 1, type_size, depth); + if (ret < 0) + goto fail; + + ret = read_iplane(&s->g[p], dst, dst_linesize, s->f[p].w, s->f[p].h, s->f[p].range, type_size, depth); + if (ret < 0) + goto fail; + + switch (s->mode) { + case ERODE: + ret = erode(&s->g[p], &s->f[p], &s->SE[p], &s->Ty[0][p]); + break; + case DILATE: + ret = dilate(&s->g[p], &s->f[p], &s->SE[p], &s->Ty[0][p]); + break; + case OPEN: + ret = read_iplane(&s->h[p], s->temp->data[p], s->temp->linesize[p], width, height, 1, type_size, depth); + if (ret < 0) + break; + ret = erode(&s->h[p], &s->f[p], &s->SE[p], &s->Ty[0][p]); + if (ret < 0) + break; + ret = dilate(&s->g[p], &s->h[p], &s->SE[p], &s->Ty[1][p]); + break; + case CLOSE: + ret = read_iplane(&s->h[p], s->temp->data[p], s->temp->linesize[p], width, height, 1, type_size, depth); + if (ret < 0) + break; + ret = dilate(&s->h[p], &s->f[p], &s->SE[p], &s->Ty[0][p]); + if (ret < 0) + break; + ret = erode(&s->g[p], &s->h[p], &s->SE[p], &s->Ty[1][p]); + break; + default: + av_assert0(0); + } + + if (ret < 0) + goto fail; + } + + av_frame_free(&in); + out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base); + return ff_filter_frame(outlink, out); +fail: + av_frame_free(&in); + return ret; +} + +static int config_output(AVFilterLink *outlink) +{ + AVFilterContext *ctx = outlink->src; + MorphoContext *s = ctx->priv; + AVFilterLink *mainlink = ctx->inputs[0]; + int ret; + + s->fs.on_event = do_morpho; + ret = ff_framesync_init_dualinput(&s->fs, ctx); + if (ret < 0) + return ret; + outlink->w = mainlink->w; + outlink->h = mainlink->h; + outlink->time_base = mainlink->time_base; + outlink->sample_aspect_ratio = mainlink->sample_aspect_ratio; + outlink->frame_rate = mainlink->frame_rate; + + if ((ret = ff_framesync_configure(&s->fs)) < 0) + return ret; + outlink->time_base = s->fs.time_base; + + s->temp = ff_get_video_buffer(outlink, outlink->w, outlink->h); + if (!s->temp) + return AVERROR(ENOMEM); + + s->plane_f = av_calloc(outlink->w * outlink->h, sizeof(*s->plane_f)); + s->plane_g = av_calloc(outlink->w * outlink->h, sizeof(*s->plane_g)); + if (!s->plane_f || !s->plane_g) + return AVERROR(ENOMEM); + + return 0; +} + +static av_cold void uninit(AVFilterContext *ctx) +{ + MorphoContext *s = ctx->priv; + + for (int p = 0; p < 4; p++) { + free_iplane(&s->SEimg[p]); + free_iplane(&s->f[p]); + free_iplane(&s->g[p]); + free_iplane(&s->h[p]); + free_chord_set(&s->SE[p]); + free_lut(&s->Ty[0][p]); + free_lut(&s->Ty[1][p]); + } + + ff_framesync_uninit(&s->fs); + + av_frame_free(&s->temp); + av_freep(&s->plane_f); + av_freep(&s->plane_g); +} + +static const AVFilterPad morpho_inputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + .config_props = config_input, + }, + { + .name = "structure", + .type = AVMEDIA_TYPE_VIDEO, + .config_props = config_input_structure, + }, +}; + +static const AVFilterPad morpho_outputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + .config_props = config_output, + }, +}; + +const AVFilter ff_vf_morpho = { + .name = "morpho", + .description = NULL_IF_CONFIG_SMALL("Apply Morphological filter."), + .preinit = morpho_framesync_preinit, + .priv_size = sizeof(MorphoContext), + .priv_class = &morpho_class, + .activate = activate, + .uninit = uninit, + .query_formats = query_formats, + FILTER_INPUTS(morpho_inputs), + FILTER_OUTPUTS(morpho_outputs), + .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, + .process_command = ff_filter_process_command, +};