GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavfilter/vf_deblock.c Lines: 0 81 0.0 %
Date: 2020-10-23 17:01:47 Branches: 0 110 0.0 %

Line Branch Exec Source
1
/*
2
 * Copyright (c) 2018 Paul B Mahol
3
 *
4
 * This file is part of FFmpeg.
5
 *
6
 * FFmpeg is free software; you can redistribute it and/or
7
 * modify it under the terms of the GNU Lesser General Public
8
 * License as published by the Free Software Foundation; either
9
 * version 2.1 of the License, or (at your option) any later version.
10
 *
11
 * FFmpeg is distributed in the hope that it will be useful,
12
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14
 * Lesser General Public License for more details.
15
 *
16
 * You should have received a copy of the GNU Lesser General Public
17
 * License along with FFmpeg; if not, write to the Free Software
18
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19
 */
20
21
/*
22
 * Based on paper: A Simple and Efficient Deblocking Algorithm for Low Bit-Rate Video Coding.
23
 */
24
25
#include "libavutil/imgutils.h"
26
#include "libavutil/opt.h"
27
#include "libavutil/pixdesc.h"
28
29
#include "avfilter.h"
30
#include "formats.h"
31
#include "internal.h"
32
#include "video.h"
33
34
enum FilterType { WEAK, STRONG, NB_FILTER };
35
36
typedef struct DeblockContext {
37
    const AVClass *class;
38
    const AVPixFmtDescriptor *desc;
39
    int filter;
40
    int block;
41
    int planes;
42
    float alpha;
43
    float beta;
44
    float gamma;
45
    float delta;
46
47
    int ath;
48
    int bth;
49
    int gth;
50
    int dth;
51
    int max;
52
    int depth;
53
    int bpc;
54
    int nb_planes;
55
    int planewidth[4];
56
    int planeheight[4];
57
58
    void (*deblockh)(uint8_t *dst, ptrdiff_t dst_linesize, int block,
59
                     int ath, int bth, int gth, int dth, int max);
60
    void (*deblockv)(uint8_t *dst, ptrdiff_t dst_linesize, int block,
61
                     int ath, int bth, int gth, int dth, int max);
62
} DeblockContext;
63
64
static int query_formats(AVFilterContext *ctx)
65
{
66
    static const enum AVPixelFormat pixel_fmts[] = {
67
        AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P,
68
        AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
69
        AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUV420P,
70
        AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
71
        AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
72
        AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
73
        AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
74
        AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
75
        AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
76
        AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
77
        AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
78
        AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
79
        AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12,
80
        AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
81
        AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
82
        AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
83
        AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
84
        AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16,
85
        AV_PIX_FMT_NONE
86
    };
87
    AVFilterFormats *formats = ff_make_format_list(pixel_fmts);
88
    if (!formats)
89
        return AVERROR(ENOMEM);
90
    return ff_set_common_formats(ctx, formats);
91
}
92
93
#define WEAK_HFILTER(name, type, ldiv)                                              \
94
static void deblockh##name##_weak(uint8_t *dstp, ptrdiff_t dst_linesize, int block, \
95
                                  int ath, int bth, int gth, int dth, int max)      \
96
{                                                                                   \
97
    type *dst;                                                                      \
98
    int x;                                                                          \
99
                                                                                    \
100
    dst = (type *)dstp;                                                             \
101
    dst_linesize /= ldiv;                                                           \
102
                                                                                    \
103
    for (x = 0; x < block; x++) {                                                   \
104
        int delta = dst[x] - dst[x - dst_linesize];                                 \
105
        int A, B, C, D, a, b, c, d;                                                 \
106
                                                                                    \
107
        if (FFABS(delta) >= ath ||                                                  \
108
            FFABS(dst[x - 1 * dst_linesize] - dst[x - 2 * dst_linesize]) >= bth ||  \
109
            FFABS(dst[x + 0 * dst_linesize] - dst[x + 1 * dst_linesize]) >= gth)    \
110
            continue;                                                               \
111
                                                                                    \
112
        A = dst[x - 2 * dst_linesize];                                              \
113
        B = dst[x - 1 * dst_linesize];                                              \
114
        C = dst[x + 0 * dst_linesize];                                              \
115
        D = dst[x + 1 * dst_linesize];                                              \
116
                                                                                    \
117
        a = A + delta / 8;                                                          \
118
        b = B + delta / 2;                                                          \
119
        c = C - delta / 2;                                                          \
120
        d = D - delta / 8;                                                          \
121
                                                                                    \
122
        dst[x - 2 * dst_linesize] = av_clip(a, 0, max);                             \
123
        dst[x - 1 * dst_linesize] = av_clip(b, 0, max);                             \
124
        dst[x + 0 * dst_linesize] = av_clip(c, 0, max);                             \
125
        dst[x + 1 * dst_linesize] = av_clip(d, 0, max);                             \
126
    }                                                                               \
127
}
128
129
WEAK_HFILTER(8, uint8_t, 1)
130
WEAK_HFILTER(16, uint16_t, 2)
131
132
#define WEAK_VFILTER(name, type, ldiv)                                              \
133
static void deblockv##name##_weak(uint8_t *dstp, ptrdiff_t dst_linesize, int block, \
134
                                  int ath, int bth, int gth, int dth, int max)      \
135
{                                                                                   \
136
    type *dst;                                                                      \
137
    int y;                                                                          \
138
                                                                                    \
139
    dst = (type *)dstp;                                                             \
140
    dst_linesize /= ldiv;                                                           \
141
                                                                                    \
142
    for (y = 0; y < block; y++) {                                                   \
143
        int delta = dst[0] - dst[-1];                                               \
144
        int A, B, C, D, a, b, c, d;                                                 \
145
                                                                                    \
146
        if (FFABS(delta) >= ath ||                                                  \
147
            FFABS(dst[-1] - dst[-2]) >= bth ||                                      \
148
            FFABS(dst[0] - dst[1]) >= gth)                                          \
149
            continue;                                                               \
150
                                                                                    \
151
        A = dst[-2];                                                                \
152
        B = dst[-1];                                                                \
153
        C = dst[+0];                                                                \
154
        D = dst[+1];                                                                \
155
                                                                                    \
156
        a = A + delta / 8;                                                          \
157
        b = B + delta / 2;                                                          \
158
        c = C - delta / 2;                                                          \
159
        d = D - delta / 8;                                                          \
160
                                                                                    \
161
        dst[-2] = av_clip(a, 0, max);                                               \
162
        dst[-1] = av_clip(b, 0, max);                                               \
163
        dst[+0] = av_clip(c, 0, max);                                               \
164
        dst[+1] = av_clip(d, 0, max);                                               \
165
                                                                                    \
166
        dst += dst_linesize;                                                        \
167
    }                                                                               \
168
}
169
170
WEAK_VFILTER(8, uint8_t, 1)
171
WEAK_VFILTER(16, uint16_t, 2)
172
173
#define STRONG_HFILTER(name, type, ldiv)                                           \
174
static void deblockh##name##_strong(uint8_t *dstp, ptrdiff_t dst_linesize, int block,\
175
                                    int ath, int bth, int gth, int dth, int max)   \
176
{                                                                                  \
177
    type *dst;                                                                     \
178
    int x;                                                                         \
179
                                                                                   \
180
    dst = (type *)dstp;                                                            \
181
    dst_linesize /= ldiv;                                                          \
182
                                                                                   \
183
    for (x = 0; x < block; x++) {                                                  \
184
        int A, B, C, D, E, F, a, b, c, d, e, f;                                    \
185
        int delta = dst[x] - dst[x - dst_linesize];                                \
186
                                                                                   \
187
        if (FFABS(delta) >= ath ||                                                 \
188
            FFABS(dst[x - 1 * dst_linesize] - dst[x - 2 * dst_linesize]) >= bth || \
189
            FFABS(dst[x + 1 * dst_linesize] - dst[x + 2 * dst_linesize]) >= gth || \
190
            FFABS(dst[x + 0 * dst_linesize] - dst[x + 1 * dst_linesize]) >= dth)   \
191
            continue;                                                              \
192
                                                                                   \
193
        A = dst[x - 3 * dst_linesize];                                             \
194
        B = dst[x - 2 * dst_linesize];                                             \
195
        C = dst[x - 1 * dst_linesize];                                             \
196
        D = dst[x + 0 * dst_linesize];                                             \
197
        E = dst[x + 1 * dst_linesize];                                             \
198
        F = dst[x + 2 * dst_linesize];                                             \
199
                                                                                   \
200
        a = A + delta / 8;                                                         \
201
        b = B + delta / 4;                                                         \
202
        c = C + delta / 2;                                                         \
203
        d = D - delta / 2;                                                         \
204
        e = E - delta / 4;                                                         \
205
        f = F - delta / 8;                                                         \
206
                                                                                   \
207
        dst[x - 3 * dst_linesize] = av_clip(a, 0, max);                            \
208
        dst[x - 2 * dst_linesize] = av_clip(b, 0, max);                            \
209
        dst[x - 1 * dst_linesize] = av_clip(c, 0, max);                            \
210
        dst[x + 0 * dst_linesize] = av_clip(d, 0, max);                            \
211
        dst[x + 1 * dst_linesize] = av_clip(e, 0, max);                            \
212
        dst[x + 2 * dst_linesize] = av_clip(f, 0, max);                            \
213
    }                                                                              \
214
}
215
216
STRONG_HFILTER(8, uint8_t, 1)
217
STRONG_HFILTER(16, uint16_t, 2)
218
219
#define STRONG_VFILTER(name, type, ldiv)                                           \
220
static void deblockv##name##_strong(uint8_t *dstp, ptrdiff_t dst_linesize, int block,\
221
                                    int ath, int bth, int gth, int dth, int max)   \
222
{                                                                                  \
223
    type *dst;                                                                     \
224
    int y;                                                                         \
225
                                                                                   \
226
    dst = (type *)dstp;                                                            \
227
    dst_linesize /= ldiv;                                                          \
228
                                                                                   \
229
    for (y = 0; y < block; y++) {                                                  \
230
        int A, B, C, D, E, F, a, b, c, d, e, f;                                    \
231
        int delta = dst[0] - dst[-1];                                              \
232
                                                                                   \
233
        if (FFABS(delta) >= ath ||                                                 \
234
            FFABS(dst[-1] - dst[-2]) >= bth ||                                     \
235
            FFABS(dst[+1] - dst[+2]) >= gth ||                                     \
236
            FFABS(dst[+0] - dst[+1]) >= dth)                                       \
237
            continue;                                                              \
238
                                                                                   \
239
        A = dst[-3];                                                               \
240
        B = dst[-2];                                                               \
241
        C = dst[-1];                                                               \
242
        D = dst[+0];                                                               \
243
        E = dst[+1];                                                               \
244
        F = dst[+2];                                                               \
245
                                                                                   \
246
        a = A + delta / 8;                                                         \
247
        b = B + delta / 4;                                                         \
248
        c = C + delta / 2;                                                         \
249
        d = D - delta / 2;                                                         \
250
        e = E - delta / 4;                                                         \
251
        f = F - delta / 8;                                                         \
252
                                                                                   \
253
        dst[-3] = av_clip(a, 0, max);                                              \
254
        dst[-2] = av_clip(b, 0, max);                                              \
255
        dst[-1] = av_clip(c, 0, max);                                              \
256
        dst[+0] = av_clip(d, 0, max);                                              \
257
        dst[+1] = av_clip(e, 0, max);                                              \
258
        dst[+2] = av_clip(f, 0, max);                                              \
259
                                                                                   \
260
        dst += dst_linesize;                                                       \
261
    }                                                                              \
262
}
263
264
STRONG_VFILTER(8, uint8_t, 1)
265
STRONG_VFILTER(16, uint16_t, 2)
266
267
static int config_output(AVFilterLink *outlink)
268
{
269
    AVFilterContext *ctx = outlink->src;
270
    DeblockContext *s = ctx->priv;
271
    AVFilterLink *inlink = ctx->inputs[0];
272
273
    s->desc = av_pix_fmt_desc_get(outlink->format);
274
    if (!s->desc)
275
        return AVERROR_BUG;
276
    s->nb_planes = av_pix_fmt_count_planes(outlink->format);
277
    s->depth = s->desc->comp[0].depth;
278
    s->bpc = (s->depth + 7) / 8;
279
    s->max = (1 << s->depth) - 1;
280
    s->ath = s->alpha * s->max;
281
    s->bth = s->beta  * s->max;
282
    s->gth = s->gamma * s->max;
283
    s->dth = s->delta * s->max;
284
285
    if (s->depth <= 8 && s->filter == WEAK) {
286
        s->deblockh = deblockh8_weak;
287
        s->deblockv = deblockv8_weak;
288
    } else if (s->depth >= 8 && s->filter == WEAK) {
289
        s->deblockh = deblockh16_weak;
290
        s->deblockv = deblockv16_weak;
291
    }
292
    if (s->depth <= 8 && s->filter == STRONG) {
293
        s->deblockh = deblockh8_strong;
294
        s->deblockv = deblockv8_strong;
295
    } else if (s->depth >= 8 && s->filter == STRONG) {
296
        s->deblockh = deblockh16_strong;
297
        s->deblockv = deblockv16_strong;
298
    }
299
300
    s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, s->desc->log2_chroma_w);
301
    s->planewidth[0] = s->planewidth[3] = inlink->w;
302
303
    s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
304
    s->planeheight[0] = s->planeheight[3] = inlink->h;
305
306
    return 0;
307
}
308
309
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
310
{
311
    AVFilterContext *ctx = inlink->dst;
312
    AVFilterLink *outlink = ctx->outputs[0];
313
    DeblockContext *s = ctx->priv;
314
    const int block = s->block;
315
    AVFrame *out;
316
    int plane, x, y;
317
318
    if (av_frame_is_writable(in)) {
319
        out = in;
320
    } else {
321
        out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
322
        if (!out) {
323
            av_frame_free(&in);
324
            return AVERROR(ENOMEM);
325
        }
326
        av_frame_copy_props(out, in);
327
    }
328
329
    for (plane = 0; plane < s->nb_planes; plane++) {
330
        const int width = s->planewidth[plane];
331
        const int height = s->planeheight[plane];
332
        const uint8_t *src = (const uint8_t *)in->data[plane];
333
        uint8_t *dst = (uint8_t *)out->data[plane];
334
335
        if (in != out)
336
            av_image_copy_plane(dst, out->linesize[plane],
337
                                src, in->linesize[plane],
338
                                width * s->bpc, height);
339
340
        if (!((1 << plane) & s->planes))
341
            continue;
342
343
        for (x = block; x < width; x += block)
344
            s->deblockv(dst + x * s->bpc, out->linesize[plane],
345
                        FFMIN(block, height), s->ath, s->bth, s->gth, s->dth, s->max);
346
347
        for (y = block; y < height; y += block) {
348
            dst += out->linesize[plane] * block;
349
350
            s->deblockh(dst, out->linesize[plane],
351
                        FFMIN(block, width),
352
                        s->ath, s->bth, s->gth, s->dth, s->max);
353
354
            for (x = block; x < width; x += block) {
355
                s->deblockh(dst + x * s->bpc, out->linesize[plane],
356
                            FFMIN(block, width - x),
357
                            s->ath, s->bth, s->gth, s->dth, s->max);
358
                s->deblockv(dst + x * s->bpc, out->linesize[plane],
359
                            FFMIN(block, height - y),
360
                            s->ath, s->bth, s->gth, s->dth, s->max);
361
            }
362
        }
363
    }
364
365
    if (in != out)
366
        av_frame_free(&in);
367
    return ff_filter_frame(outlink, out);
368
}
369
370
#define OFFSET(x) offsetof(DeblockContext, x)
371
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
372
373
static const AVOption deblock_options[] = {
374
    { "filter",    "set type of filter",          OFFSET(filter),    AV_OPT_TYPE_INT,   {.i64=STRONG},0, 1,  FLAGS, "filter" },
375
    { "weak",      0,                             0,                 AV_OPT_TYPE_CONST, {.i64=WEAK},  0, 0,  FLAGS, "filter" },
376
    { "strong",    0,                             0,                 AV_OPT_TYPE_CONST, {.i64=STRONG},0, 0,  FLAGS, "filter" },
377
    { "block",     "set size of block",           OFFSET(block),     AV_OPT_TYPE_INT,   {.i64=8},    4, 512, FLAGS },
378
    { "alpha",     "set 1st detection threshold", OFFSET(alpha),     AV_OPT_TYPE_FLOAT, {.dbl=.098}, 0,  1,  FLAGS },
379
    { "beta",      "set 2nd detection threshold", OFFSET(beta),      AV_OPT_TYPE_FLOAT, {.dbl=.05},  0,  1,  FLAGS },
380
    { "gamma",     "set 3rd detection threshold", OFFSET(gamma),     AV_OPT_TYPE_FLOAT, {.dbl=.05},  0,  1,  FLAGS },
381
    { "delta",     "set 4th detection threshold", OFFSET(delta),     AV_OPT_TYPE_FLOAT, {.dbl=.05},  0,  1,  FLAGS },
382
    { "planes",    "set planes to filter",        OFFSET(planes),    AV_OPT_TYPE_INT,   {.i64=15},   0, 15,  FLAGS },
383
    { NULL },
384
};
385
386
static const AVFilterPad inputs[] = {
387
    {
388
        .name           = "default",
389
        .type           = AVMEDIA_TYPE_VIDEO,
390
        .filter_frame   = filter_frame,
391
    },
392
    { NULL }
393
};
394
395
static const AVFilterPad outputs[] = {
396
    {
397
        .name          = "default",
398
        .type          = AVMEDIA_TYPE_VIDEO,
399
        .config_props  = config_output,
400
    },
401
    { NULL }
402
};
403
404
AVFILTER_DEFINE_CLASS(deblock);
405
406
AVFilter ff_vf_deblock = {
407
    .name          = "deblock",
408
    .description   = NULL_IF_CONFIG_SMALL("Deblock video."),
409
    .priv_size     = sizeof(DeblockContext),
410
    .priv_class    = &deblock_class,
411
    .query_formats = query_formats,
412
    .inputs        = inputs,
413
    .outputs       = outputs,
414
    .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
415
};