aboutsummaryrefslogtreecommitdiffstats
path: root/libavfilter/vf_yaepblur.c
blob: d691a4f89bd71581a66a509811fc3ad97b219e48 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
/*
 * Copyright (C) 2019 Leo Zhang <leozhang@qiyi.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
 */

/**
 * @file
 * yaep(yet another edge preserving) blur filter
 *
 * This implementation is based on an algorithm described in
 * "J. S. Lee, Digital image enhancement and noise filtering by use of local statistics, IEEE Trans. Pattern
 * Anal. Mach. Intell. PAMI-2, 1980."
 */

#include "libavutil/opt.h"
#include "libavutil/imgutils.h"
#include "avfilter.h"
#include "internal.h"

typedef struct YAEPContext {
    const AVClass *class;

    int planes;
    int radius;
    int sigma;

    int nb_planes;
    int planewidth[4];
    int planeheight[4];
    int depth;

    uint64_t *sat;        ///< summed area table
    uint64_t *square_sat; ///< square summed area table
    int sat_linesize;

    int (*pre_calculate_row)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
    int (*filter_slice     )(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
} YAEPContext;

static av_cold void uninit(AVFilterContext *ctx)
{
    YAEPContext *s = ctx->priv;
    av_freep(&s->sat);
    av_freep(&s->square_sat);
}

    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_YUVA422P12, AV_PIX_FMT_YUVA444P12,
        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
    };

typedef struct ThreadData {
    int width;
    int height;
    int src_linesize;
    int dst_linesize;
    uint8_t *src;
    uint8_t *dst;
} ThreadData;

#define PRE_CALCULATE_ROW(type, name)                                    \
static int pre_calculate_row_##name(AVFilterContext *ctx, void *arg,     \
                                   int jobnr, int nb_jobs)               \
{                                                                        \
    ThreadData *td = arg;                                                \
    YAEPContext *s = ctx->priv;                                          \
                                                                         \
    const int width        = td->width;                                  \
    const int height       = td->height;                                 \
    const int linesize     = td->src_linesize / sizeof(type);            \
    const int sat_linesize = s->sat_linesize;                            \
                                                                         \
    const int starty = height * jobnr     / nb_jobs;                     \
    const int endy   = height * (jobnr+1) / nb_jobs;                     \
                                                                         \
    uint64_t *sat        = s->sat + (starty + 1) * sat_linesize;         \
    uint64_t *square_sat = s->square_sat + (starty + 1) * sat_linesize;  \
    const type *src      = (const type *)td->src + starty * linesize;    \
                                                                         \
    int x, y;                                                            \
                                                                         \
    for (y = starty; y < endy; y++) {                                    \
        for (x = 0; x < width; x++) {                                    \
            sat[x+1]        = sat[x] + src[x];                           \
            square_sat[x+1] = square_sat[x] + (uint64_t)src[x] * src[x]; \
        }                                                                \
        sat               += sat_linesize;                               \
        square_sat        += sat_linesize;                               \
        src               += linesize;                                   \
    }                                                                    \
                                                                         \
    return 0;                                                            \
}

PRE_CALCULATE_ROW(uint8_t,  byte)
PRE_CALCULATE_ROW(uint16_t, word)

static int pre_calculate_col(AVFilterContext *ctx, void *arg,
                             int jobnr, int nb_jobs)
{
    ThreadData *td = arg;
    YAEPContext *s = ctx->priv;

    const int width        = td->width;
    const int height       = td->height;
    const int sat_linesize = s->sat_linesize;

    const int startx = width * jobnr       / nb_jobs;
    const int endx   = width * (jobnr + 1) / nb_jobs;

    uint64_t *sat, *square_sat;
    int x, y;

    for (x = startx; x < endx; x++) {
        sat = s->sat + x + 1;
        square_sat = s->square_sat + x + 1;
        for (y = 0; y < height; y++) {
            *(sat+sat_linesize)        += *sat;
            *(square_sat+sat_linesize) += *square_sat;
            sat         += sat_linesize;
            square_sat  += sat_linesize;
        }
    }

    return 0;
}

#define FILTER_SLICE(type, name)                                                                          \
static int filter_slice_##name(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)                   \
{                                                                                                         \
    ThreadData *td = arg;                                                                                 \
    YAEPContext *s = ctx->priv;                                                                           \
                                                                                                          \
    const int width = td->width;                                                                          \
    const int height = td->height;                                                                        \
    const int src_linesize = td->src_linesize / sizeof(type);                                             \
    const int dst_linesize = td->dst_linesize / sizeof(type);                                             \
    const int sat_linesize = s->sat_linesize;                                                             \
    const int sigma = s->sigma;                                                                           \
    const int radius = s->radius;                                                                         \
                                                                                                          \
    uint64_t *sat = s->sat;                                                                               \
    uint64_t *square_sat = s->square_sat;                                                                 \
    const type *src = (const type *)td->src;                                                              \
    type *dst = (type *)td->dst;                                                                          \
                                                                                                          \
    const int starty = height * jobnr       / nb_jobs;                                                    \
    const int endy   = height * (jobnr + 1) / nb_jobs;                                                    \
                                                                                                          \
    int x, y;                                                                                             \
    int lower_x, higher_x;                                                                                \
    int lower_y, higher_y;                                                                                \
    int dist_y, count;                                                                                    \
    uint64_t sum, square_sum, mean, var;                                                                  \
                                                                                                          \
    for (y = starty; y < endy; y++) {                                                                     \
        lower_y  = y - radius     < 0      ? 0      : y - radius;                                         \
        higher_y = y + radius + 1 > height ? height : y + radius + 1;                                     \
        dist_y = higher_y - lower_y;                                                                      \
        for (x = 0; x < width; x++) {                                                                     \
            lower_x  = x - radius     < 0     ? 0     : x - radius;                                       \
            higher_x = x + radius + 1 > width ? width : x + radius + 1;                                   \
            count = dist_y * (higher_x - lower_x);                                                        \
            sum = sat[higher_y * sat_linesize + higher_x]                                                 \
                - sat[higher_y * sat_linesize + lower_x]                                                  \
                - sat[lower_y  * sat_linesize + higher_x]                                                 \
                + sat[lower_y  * sat_linesize + lower_x];                                                 \
            square_sum = square_sat[higher_y * sat_linesize + higher_x]                                   \
                       - square_sat[higher_y * sat_linesize + lower_x]                                    \
                       - square_sat[lower_y  * sat_linesize + higher_x]                                   \
                       + square_sat[lower_y  * sat_linesize + lower_x];                                   \
            mean = sum / count;                                                                           \
            var = (square_sum - sum * sum / count) / count;                                               \
            dst[y * dst_linesize + x] = (sigma * mean + var * src[y * src_linesize + x]) / (sigma + var); \
        }                                                                                                 \
    }                                                                                                     \
    return 0;                                                                                             \
}

FILTER_SLICE(uint8_t,  byte)
FILTER_SLICE(uint16_t, word)

static int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
    AVFilterContext *ctx = inlink->dst;
    YAEPContext *s = ctx->priv;
    AVFilterLink *outlink = ctx->outputs[0];
    AVFrame *out;
    int plane;
    const int nb_threads = ff_filter_get_nb_threads(ctx);
    ThreadData td;

    if (av_frame_is_writable(in)) {
        out = in;
    } else {
        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 (plane = 0; plane < s->nb_planes; plane++) {
        if (!s->radius || !(s->planes & (1<<plane))) {
            if (out != in) {
                av_image_copy_plane(out->data[plane], out->linesize[plane],
                                    in->data[plane], in->linesize[plane],
                                    s->planewidth[plane] * ((s->depth + 7) / 8),
                                    s->planeheight[plane]);
            }
            continue;
        }

        td.width        = s->planewidth[plane];
        td.height       = s->planeheight[plane];
        td.src          = in->data[plane];
        td.src_linesize = in->linesize[plane];
        ff_filter_execute(ctx, s->pre_calculate_row, &td, NULL,
                          FFMIN(td.height, nb_threads));
        ff_filter_execute(ctx, pre_calculate_col, &td, NULL,
                          FFMIN(td.width,  nb_threads));

        td.dst          = out->data[plane];
        td.dst_linesize = out->linesize[plane];
        ff_filter_execute(ctx, s->filter_slice, &td, NULL,
                          FFMIN(td.height, nb_threads));
    }

    if (out != in)
        av_frame_free(&in);

    return ff_filter_frame(outlink, out);
}

static int config_input(AVFilterLink *inlink)
{
    YAEPContext *s = inlink->dst->priv;
    const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);

    s->depth = desc->comp[0].depth;
    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;
    s->nb_planes = av_pix_fmt_count_planes(inlink->format);

    s->radius = FFMIN(s->radius, AV_CEIL_RSHIFT(FFMIN(inlink->w, inlink->h), 1));

    if (s->depth <= 8) {
        s->pre_calculate_row = pre_calculate_row_byte;
        s->filter_slice      = filter_slice_byte;
    } else {
        s->pre_calculate_row = pre_calculate_row_word;
        s->filter_slice      = filter_slice_word;
    }

    // padding one row on the top, and padding one col on the left, that is why + 1 below
    s->sat_linesize = inlink->w + 1;
    s->sat = av_calloc(inlink->h + 1, s->sat_linesize * sizeof(*s->sat));
    if (!s->sat)
        return AVERROR(ENOMEM);

    s->square_sat = av_calloc(inlink->h + 1, s->sat_linesize * sizeof(*s->square_sat));
    if (!s->square_sat)
        return AVERROR(ENOMEM);

    return 0;
}

static const AVFilterPad yaep_inputs[] = {
    {
        .name = "default",
        .type = AVMEDIA_TYPE_VIDEO,
        .config_props = config_input,
        .filter_frame = filter_frame,
    },
};

static const AVFilterPad yaep_outputs[] = {
    {
        .name = "default",
        .type = AVMEDIA_TYPE_VIDEO,
    },
};

#define OFFSET(x) offsetof(YAEPContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM

static const AVOption yaepblur_options[] = {
    { "radius", "set window radius",    OFFSET(radius), AV_OPT_TYPE_INT, {.i64=3},   0, INT_MAX, .flags=FLAGS },
    { "r"     , "set window radius",    OFFSET(radius), AV_OPT_TYPE_INT, {.i64=3},   0, INT_MAX, .flags=FLAGS },
    { "planes", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=1},   0,     0xF, .flags=FLAGS },
    { "p",      "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=1},   0,     0xF, .flags=FLAGS },
    { "sigma",  "set blur strength",    OFFSET(sigma),  AV_OPT_TYPE_INT, {.i64=128}, 1, INT_MAX, .flags=FLAGS },
    { "s",      "set blur strength",    OFFSET(sigma),  AV_OPT_TYPE_INT, {.i64=128}, 1, INT_MAX, .flags=FLAGS },
    { NULL }
};

AVFILTER_DEFINE_CLASS(yaepblur);

const AVFilter ff_vf_yaepblur = {
    .name            = "yaepblur",
    .description     = NULL_IF_CONFIG_SMALL("Yet another edge preserving blur filter."),
    .priv_size       = sizeof(YAEPContext),
    .priv_class      = &yaepblur_class,
    .uninit          = uninit,
    FILTER_INPUTS(yaep_inputs),
    FILTER_OUTPUTS(yaep_outputs),
    FILTER_PIXFMTS_ARRAY(pix_fmts),
    .flags           = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
    .process_command = ff_filter_process_command,
};