aboutsummaryrefslogtreecommitdiffstats
path: root/libavfilter/vf_bwdif.c
blob: 6b737bba3213f39144302a4c0825d229697e0c42 (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
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
/*
 * BobWeaver Deinterlacing Filter
 * Copyright (C) 2016 Thomas Mundt <loudmax@yahoo.de>
 *
 * Based on YADIF (Yet Another Deinterlacing Filter)
 * Copyright (C) 2006-2011 Michael Niedermayer <michaelni@gmx.at>
 *               2010      James Darnley <james.darnley@gmail.com>
 *
 * With use of Weston 3 Field Deinterlacing Filter algorithm
 * Copyright (C) 2012 British Broadcasting Corporation, All Rights Reserved
 * Author of de-interlace algorithm: Jim Easterbrook for BBC R&D
 * Based on the process described by Martin Weston for BBC R&D
 *
 * 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/common.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "libavutil/imgutils.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
#include "bwdif.h"

/*
 * Filter coefficients coef_lf and coef_hf taken from BBC PH-2071 (Weston 3 Field Deinterlacer).
 * Used when there is spatial and temporal interpolation.
 * Filter coefficients coef_sp are used when there is spatial interpolation only.
 * Adjusted for matching visual sharpness impression of spatial and temporal interpolation.
 */
static const uint16_t coef_lf[2] = { 4309, 213 };
static const uint16_t coef_hf[3] = { 5570, 3801, 1016 };
static const uint16_t coef_sp[2] = { 5077, 981 };

typedef struct ThreadData {
    AVFrame *frame;
    int plane;
    int w, h;
    int parity;
    int tff;
} ThreadData;

#define FILTER_INTRA() \
    for (x = 0; x < w; x++) { \
        interpol = (coef_sp[0] * (cur[mrefs] + cur[prefs]) - coef_sp[1] * (cur[mrefs3] + cur[prefs3])) >> 13; \
        dst[0] = av_clip(interpol, 0, clip_max); \
 \
        dst++; \
        cur++; \
    }

#define FILTER1() \
    for (x = 0; x < w; x++) { \
        int c = cur[mrefs]; \
        int d = (prev2[0] + next2[0]) >> 1; \
        int e = cur[prefs]; \
        int temporal_diff0 = FFABS(prev2[0] - next2[0]); \
        int temporal_diff1 =(FFABS(prev[mrefs] - c) + FFABS(prev[prefs] - e)) >> 1; \
        int temporal_diff2 =(FFABS(next[mrefs] - c) + FFABS(next[prefs] - e)) >> 1; \
        int diff = FFMAX3(temporal_diff0 >> 1, temporal_diff1, temporal_diff2); \
 \
        if (!diff) { \
            dst[0] = d; \
        } else {

#define SPAT_CHECK() \
            int b = ((prev2[mrefs2] + next2[mrefs2]) >> 1) - c; \
            int f = ((prev2[prefs2] + next2[prefs2]) >> 1) - e; \
            int dc = d - c; \
            int de = d - e; \
            int max = FFMAX3(de, dc, FFMIN(b, f)); \
            int min = FFMIN3(de, dc, FFMAX(b, f)); \
            diff = FFMAX3(diff, min, -max);

#define FILTER_LINE() \
            SPAT_CHECK() \
            if (FFABS(c - e) > temporal_diff0) { \
                interpol = (((coef_hf[0] * (prev2[0] + next2[0]) \
                    - coef_hf[1] * (prev2[mrefs2] + next2[mrefs2] + prev2[prefs2] + next2[prefs2]) \
                    + coef_hf[2] * (prev2[mrefs4] + next2[mrefs4] + prev2[prefs4] + next2[prefs4])) >> 2) \
                    + coef_lf[0] * (c + e) - coef_lf[1] * (cur[mrefs3] + cur[prefs3])) >> 13; \
            } else { \
                interpol = (coef_sp[0] * (c + e) - coef_sp[1] * (cur[mrefs3] + cur[prefs3])) >> 13; \
            }

#define FILTER_EDGE() \
            if (spat) { \
                SPAT_CHECK() \
            } \
            interpol = (c + e) >> 1;

#define FILTER2() \
            if (interpol > d + diff) \
                interpol = d + diff; \
            else if (interpol < d - diff) \
                interpol = d - diff; \
 \
            dst[0] = av_clip(interpol, 0, clip_max); \
        } \
 \
        dst++; \
        cur++; \
        prev++; \
        next++; \
        prev2++; \
        next2++; \
    }

static void filter_intra(void *dst1, void *cur1, int w, int prefs, int mrefs,
                         int prefs3, int mrefs3, int parity, int clip_max)
{
    uint8_t *dst = dst1;
    uint8_t *cur = cur1;
    int interpol, x;

    FILTER_INTRA()
}

static void filter_line_c(void *dst1, void *prev1, void *cur1, void *next1,
                          int w, int prefs, int mrefs, int prefs2, int mrefs2,
                          int prefs3, int mrefs3, int prefs4, int mrefs4,
                          int parity, int clip_max)
{
    uint8_t *dst   = dst1;
    uint8_t *prev  = prev1;
    uint8_t *cur   = cur1;
    uint8_t *next  = next1;
    uint8_t *prev2 = parity ? prev : cur ;
    uint8_t *next2 = parity ? cur  : next;
    int interpol, x;

    FILTER1()
    FILTER_LINE()
    FILTER2()
}

static void filter_edge(void *dst1, void *prev1, void *cur1, void *next1,
                        int w, int prefs, int mrefs, int prefs2, int mrefs2,
                        int parity, int clip_max, int spat)
{
    uint8_t *dst   = dst1;
    uint8_t *prev  = prev1;
    uint8_t *cur   = cur1;
    uint8_t *next  = next1;
    uint8_t *prev2 = parity ? prev : cur ;
    uint8_t *next2 = parity ? cur  : next;
    int interpol, x;

    FILTER1()
    FILTER_EDGE()
    FILTER2()
}

static void filter_intra_16bit(void *dst1, void *cur1, int w, int prefs, int mrefs,
                               int prefs3, int mrefs3, int parity, int clip_max)
{
    uint16_t *dst = dst1;
    uint16_t *cur = cur1;
    int interpol, x;

    FILTER_INTRA()
}

static void filter_line_c_16bit(void *dst1, void *prev1, void *cur1, void *next1,
                                int w, int prefs, int mrefs, int prefs2, int mrefs2,
                                int prefs3, int mrefs3, int prefs4, int mrefs4,
                                int parity, int clip_max)
{
    uint16_t *dst   = dst1;
    uint16_t *prev  = prev1;
    uint16_t *cur   = cur1;
    uint16_t *next  = next1;
    uint16_t *prev2 = parity ? prev : cur ;
    uint16_t *next2 = parity ? cur  : next;
    int interpol, x;

    FILTER1()
    FILTER_LINE()
    FILTER2()
}

static void filter_edge_16bit(void *dst1, void *prev1, void *cur1, void *next1,
                              int w, int prefs, int mrefs, int prefs2, int mrefs2,
                              int parity, int clip_max, int spat)
{
    uint16_t *dst   = dst1;
    uint16_t *prev  = prev1;
    uint16_t *cur   = cur1;
    uint16_t *next  = next1;
    uint16_t *prev2 = parity ? prev : cur ;
    uint16_t *next2 = parity ? cur  : next;
    int interpol, x;

    FILTER1()
    FILTER_EDGE()
    FILTER2()
}

static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
    BWDIFContext *s = ctx->priv;
    YADIFContext *yadif = &s->yadif;
    ThreadData *td  = arg;
    int linesize = yadif->cur->linesize[td->plane];
    int clip_max = (1 << (yadif->csp->comp[td->plane].depth)) - 1;
    int df = (yadif->csp->comp[td->plane].depth + 7) / 8;
    int refs = linesize / df;
    int slice_start = (td->h *  jobnr   ) / nb_jobs;
    int slice_end   = (td->h * (jobnr+1)) / nb_jobs;
    int y;

    for (y = slice_start; y < slice_end; y++) {
        if ((y ^ td->parity) & 1) {
            uint8_t *prev = &yadif->prev->data[td->plane][y * linesize];
            uint8_t *cur  = &yadif->cur ->data[td->plane][y * linesize];
            uint8_t *next = &yadif->next->data[td->plane][y * linesize];
            uint8_t *dst  = &td->frame->data[td->plane][y * td->frame->linesize[td->plane]];
            if (yadif->current_field == YADIF_FIELD_END) {
                s->filter_intra(dst, cur, td->w, (y + df) < td->h ? refs : -refs,
                                y > (df - 1) ? -refs : refs,
                                (y + 3*df) < td->h ? 3 * refs : -refs,
                                y > (3*df - 1) ? -3 * refs : refs,
                                td->parity ^ td->tff, clip_max);
            } else if ((y < 4) || ((y + 5) > td->h)) {
                s->filter_edge(dst, prev, cur, next, td->w,
                               (y + df) < td->h ? refs : -refs,
                               y > (df - 1) ? -refs : refs,
                               refs << 1, -(refs << 1),
                               td->parity ^ td->tff, clip_max,
                               (y < 2) || ((y + 3) > td->h) ? 0 : 1);
            } else {
                s->filter_line(dst, prev, cur, next, td->w,
                               refs, -refs, refs << 1, -(refs << 1),
                               3 * refs, -3 * refs, refs << 2, -(refs << 2),
                               td->parity ^ td->tff, clip_max);
            }
        } else {
            memcpy(&td->frame->data[td->plane][y * td->frame->linesize[td->plane]],
                   &yadif->cur->data[td->plane][y * linesize], td->w * df);
        }
    }
    return 0;
}

static void filter(AVFilterContext *ctx, AVFrame *dstpic,
                   int parity, int tff)
{
    BWDIFContext *bwdif = ctx->priv;
    YADIFContext *yadif = &bwdif->yadif;
    ThreadData td = { .frame = dstpic, .parity = parity, .tff = tff };
    int i;

    for (i = 0; i < yadif->csp->nb_components; i++) {
        int w = dstpic->width;
        int h = dstpic->height;

        if (i == 1 || i == 2) {
            w = AV_CEIL_RSHIFT(w, yadif->csp->log2_chroma_w);
            h = AV_CEIL_RSHIFT(h, yadif->csp->log2_chroma_h);
        }

        td.w     = w;
        td.h     = h;
        td.plane = i;

        ff_filter_execute(ctx, filter_slice, &td, NULL,
                          FFMIN(h, ff_filter_get_nb_threads(ctx)));
    }
    if (yadif->current_field == YADIF_FIELD_END) {
        yadif->current_field = YADIF_FIELD_NORMAL;
    }

    emms_c();
}

static av_cold void uninit(AVFilterContext *ctx)
{
    BWDIFContext *bwdif = ctx->priv;
    YADIFContext *yadif = &bwdif->yadif;

    av_frame_free(&yadif->prev);
    av_frame_free(&yadif->cur );
    av_frame_free(&yadif->next);
}

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_YUVJ411P, AV_PIX_FMT_YUVJ420P,
        AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P,
        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_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
        AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
        AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
        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_GBRAP16,
        AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY16,
        AV_PIX_FMT_NONE
    };

    return ff_set_common_formats_from_list(ctx, pix_fmts);
}

static int config_props(AVFilterLink *link)
{
    AVFilterContext *ctx = link->src;
    BWDIFContext *s = link->src->priv;
    YADIFContext *yadif = &s->yadif;

    link->time_base = av_mul_q(ctx->inputs[0]->time_base, (AVRational){1, 2});
    link->w         = link->src->inputs[0]->w;
    link->h         = link->src->inputs[0]->h;

    if(yadif->mode&1)
        link->frame_rate = av_mul_q(link->src->inputs[0]->frame_rate, (AVRational){2,1});

    if (link->w < 3 || link->h < 4) {
        av_log(ctx, AV_LOG_ERROR, "Video of less than 3 columns or 4 lines is not supported\n");
        return AVERROR(EINVAL);
    }

    yadif->csp = av_pix_fmt_desc_get(link->format);
    yadif->filter = filter;
    if (yadif->csp->comp[0].depth > 8) {
        s->filter_intra = filter_intra_16bit;
        s->filter_line  = filter_line_c_16bit;
        s->filter_edge  = filter_edge_16bit;
    } else {
        s->filter_intra = filter_intra;
        s->filter_line  = filter_line_c;
        s->filter_edge  = filter_edge;
    }

    if (ARCH_X86)
        ff_bwdif_init_x86(s);

    return 0;
}


#define OFFSET(x) offsetof(YADIFContext, 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}, INT_MIN, INT_MAX, FLAGS, unit }

static const AVOption bwdif_options[] = {
    { "mode",   "specify the interlacing mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=YADIF_MODE_SEND_FIELD}, 0, 1, FLAGS, "mode"},
    CONST("send_frame", "send one frame for each frame", YADIF_MODE_SEND_FRAME, "mode"),
    CONST("send_field", "send one frame for each field", YADIF_MODE_SEND_FIELD, "mode"),

    { "parity", "specify the assumed picture field parity", OFFSET(parity), AV_OPT_TYPE_INT, {.i64=YADIF_PARITY_AUTO}, -1, 1, FLAGS, "parity" },
    CONST("tff",  "assume top field first",    YADIF_PARITY_TFF,  "parity"),
    CONST("bff",  "assume bottom field first", YADIF_PARITY_BFF,  "parity"),
    CONST("auto", "auto detect parity",        YADIF_PARITY_AUTO, "parity"),

    { "deint", "specify which frames to deinterlace", OFFSET(deint), AV_OPT_TYPE_INT, {.i64=YADIF_DEINT_ALL}, 0, 1, FLAGS, "deint" },
    CONST("all",        "deinterlace all frames",                       YADIF_DEINT_ALL,        "deint"),
    CONST("interlaced", "only deinterlace frames marked as interlaced", YADIF_DEINT_INTERLACED, "deint"),

    { NULL }
};

AVFILTER_DEFINE_CLASS(bwdif);

static const AVFilterPad avfilter_vf_bwdif_inputs[] = {
    {
        .name          = "default",
        .type          = AVMEDIA_TYPE_VIDEO,
        .filter_frame  = ff_yadif_filter_frame,
    },
    { NULL }
};

static const AVFilterPad avfilter_vf_bwdif_outputs[] = {
    {
        .name          = "default",
        .type          = AVMEDIA_TYPE_VIDEO,
        .request_frame = ff_yadif_request_frame,
        .config_props  = config_props,
    },
    { NULL }
};

const AVFilter ff_vf_bwdif = {
    .name          = "bwdif",
    .description   = NULL_IF_CONFIG_SMALL("Deinterlace the input image."),
    .priv_size     = sizeof(BWDIFContext),
    .priv_class    = &bwdif_class,
    .uninit        = uninit,
    .query_formats = query_formats,
    .inputs        = avfilter_vf_bwdif_inputs,
    .outputs       = avfilter_vf_bwdif_outputs,
    .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS,
};