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Imported Debian version 2.4.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavfilter / vf_fieldmatch.c
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2ba45a60
DM		 1/*
2 * Copyright (c) 2012 Fredrik Mellbin
3 * Copyright (c) 2013 Clément Bœsch
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22/**
23 * @file
24 * Fieldmatching filter, ported from VFM filter (VapouSsynth) by Clément.
25 * Fredrik Mellbin is the author of the VIVTC/VFM filter, which is itself a
26 * light clone of the TIVTC/TFM (AviSynth) filter written by Kevin Stone
27 * (tritical), the original author.
28 *
29 * @see http://bengal.missouri.edu/~kes25c/
30 * @see http://www.vapoursynth.com/about/
31 */
32
33#include <inttypes.h>
34
35#include "libavutil/avassert.h"
36#include "libavutil/imgutils.h"
37#include "libavutil/opt.h"
38#include "libavutil/timestamp.h"
39#include "avfilter.h"
40#include "internal.h"
41
42#define INPUT_MAIN 0
43#define INPUT_CLEANSRC 1
44
45enum fieldmatch_parity {
46 FM_PARITY_AUTO = -1,
47 FM_PARITY_BOTTOM = 0,
48 FM_PARITY_TOP = 1,
49};
50
51enum matching_mode {
52 MODE_PC,
53 MODE_PC_N,
54 MODE_PC_U,
55 MODE_PC_N_UB,
56 MODE_PCN,
57 MODE_PCN_UB,
58 NB_MODE
59};
60
61enum comb_matching_mode {
62 COMBMATCH_NONE,
63 COMBMATCH_SC,
64 COMBMATCH_FULL,
65 NB_COMBMATCH
66};
67
68enum comb_dbg {
69 COMBDBG_NONE,
70 COMBDBG_PCN,
71 COMBDBG_PCNUB,
72 NB_COMBDBG
73};
74
75typedef struct {
76 const AVClass *class;
77
78 AVFrame *prv, *src, *nxt; ///< main sliding window of 3 frames
79 AVFrame *prv2, *src2, *nxt2; ///< sliding window of the optional second stream
80 int got_frame[2]; ///< frame request flag for each input stream
81 int hsub, vsub; ///< chroma subsampling values
82 uint32_t eof; ///< bitmask for end of stream
83 int64_t lastscdiff;
84 int64_t lastn;
85
86 /* options */
87 int order;
88 int ppsrc;
89 enum matching_mode mode;
90 int field;
91 int mchroma;
92 int y0, y1;
93 int64_t scthresh;
94 double scthresh_flt;
95 enum comb_matching_mode combmatch;
96 int combdbg;
97 int cthresh;
98 int chroma;
99 int blockx, blocky;
100 int combpel;
101
102 /* misc buffers */
103 uint8_t *map_data[4];
104 int map_linesize[4];
105 uint8_t *cmask_data[4];
106 int cmask_linesize[4];
107 int *c_array;
108 int tpitchy, tpitchuv;
109 uint8_t *tbuffer;
110} FieldMatchContext;
111
112#define OFFSET(x) offsetof(FieldMatchContext, x)
113#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
114
115static const AVOption fieldmatch_options[] = {
116 { "order", "specify the assumed field order", OFFSET(order), AV_OPT_TYPE_INT, {.i64=FM_PARITY_AUTO}, -1, 1, FLAGS, "order" },
117 { "auto", "auto detect parity", 0, AV_OPT_TYPE_CONST, {.i64=FM_PARITY_AUTO}, INT_MIN, INT_MAX, FLAGS, "order" },
118 { "bff", "assume bottom field first", 0, AV_OPT_TYPE_CONST, {.i64=FM_PARITY_BOTTOM}, INT_MIN, INT_MAX, FLAGS, "order" },
119 { "tff", "assume top field first", 0, AV_OPT_TYPE_CONST, {.i64=FM_PARITY_TOP}, INT_MIN, INT_MAX, FLAGS, "order" },
120 { "mode", "set the matching mode or strategy to use", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=MODE_PC_N}, MODE_PC, NB_MODE-1, FLAGS, "mode" },
121 { "pc", "2-way match (p/c)", 0, AV_OPT_TYPE_CONST, {.i64=MODE_PC}, INT_MIN, INT_MAX, FLAGS, "mode" },
122 { "pc_n", "2-way match + 3rd match on combed (p/c + u)", 0, AV_OPT_TYPE_CONST, {.i64=MODE_PC_N}, INT_MIN, INT_MAX, FLAGS, "mode" },
123 { "pc_u", "2-way match + 3rd match (same order) on combed (p/c + u)", 0, AV_OPT_TYPE_CONST, {.i64=MODE_PC_U}, INT_MIN, INT_MAX, FLAGS, "mode" },
124 { "pc_n_ub", "2-way match + 3rd match on combed + 4th/5th matches if still combed (p/c + u + u/b)", 0, AV_OPT_TYPE_CONST, {.i64=MODE_PC_N_UB}, INT_MIN, INT_MAX, FLAGS, "mode" },
125 { "pcn", "3-way match (p/c/n)", 0, AV_OPT_TYPE_CONST, {.i64=MODE_PCN}, INT_MIN, INT_MAX, FLAGS, "mode" },
126 { "pcn_ub", "3-way match + 4th/5th matches on combed (p/c/n + u/b)", 0, AV_OPT_TYPE_CONST, {.i64=MODE_PCN_UB}, INT_MIN, INT_MAX, FLAGS, "mode" },
127 { "ppsrc", "mark main input as a pre-processed input and activate clean source input stream", OFFSET(ppsrc), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS },
128 { "field", "set the field to match from", OFFSET(field), AV_OPT_TYPE_INT, {.i64=FM_PARITY_AUTO}, -1, 1, FLAGS, "field" },
129 { "auto", "automatic (same value as 'order')", 0, AV_OPT_TYPE_CONST, {.i64=FM_PARITY_AUTO}, INT_MIN, INT_MAX, FLAGS, "field" },
130 { "bottom", "bottom field", 0, AV_OPT_TYPE_CONST, {.i64=FM_PARITY_BOTTOM}, INT_MIN, INT_MAX, FLAGS, "field" },
131 { "top", "top field", 0, AV_OPT_TYPE_CONST, {.i64=FM_PARITY_TOP}, INT_MIN, INT_MAX, FLAGS, "field" },
132 { "mchroma", "set whether or not chroma is included during the match comparisons", OFFSET(mchroma), AV_OPT_TYPE_INT, {.i64=1}, 0, 1, FLAGS },
133 { "y0", "define an exclusion band which excludes the lines between y0 and y1 from the field matching decision", OFFSET(y0), AV_OPT_TYPE_INT, {.i64=0}, 0, INT_MAX, FLAGS },
134 { "y1", "define an exclusion band which excludes the lines between y0 and y1 from the field matching decision", OFFSET(y1), AV_OPT_TYPE_INT, {.i64=0}, 0, INT_MAX, FLAGS },
135 { "scthresh", "set scene change detection threshold", OFFSET(scthresh_flt), AV_OPT_TYPE_DOUBLE, {.dbl=12}, 0, 100, FLAGS },
136 { "combmatch", "set combmatching mode", OFFSET(combmatch), AV_OPT_TYPE_INT, {.i64=COMBMATCH_SC}, COMBMATCH_NONE, NB_COMBMATCH-1, FLAGS, "combmatching" },
137 { "none", "disable combmatching", 0, AV_OPT_TYPE_CONST, {.i64=COMBMATCH_NONE}, INT_MIN, INT_MAX, FLAGS, "combmatching" },
138 { "sc", "enable combmatching only on scene change", 0, AV_OPT_TYPE_CONST, {.i64=COMBMATCH_SC}, INT_MIN, INT_MAX, FLAGS, "combmatching" },
139 { "full", "enable combmatching all the time", 0, AV_OPT_TYPE_CONST, {.i64=COMBMATCH_FULL}, INT_MIN, INT_MAX, FLAGS, "combmatching" },
140 { "combdbg", "enable comb debug", OFFSET(combdbg), AV_OPT_TYPE_INT, {.i64=COMBDBG_NONE}, COMBDBG_NONE, NB_COMBDBG-1, FLAGS, "dbglvl" },
141 { "none", "no forced calculation", 0, AV_OPT_TYPE_CONST, {.i64=COMBDBG_NONE}, INT_MIN, INT_MAX, FLAGS, "dbglvl" },
142 { "pcn", "calculate p/c/n", 0, AV_OPT_TYPE_CONST, {.i64=COMBDBG_PCN}, INT_MIN, INT_MAX, FLAGS, "dbglvl" },
143 { "pcnub", "calculate p/c/n/u/b", 0, AV_OPT_TYPE_CONST, {.i64=COMBDBG_PCNUB}, INT_MIN, INT_MAX, FLAGS, "dbglvl" },
144 { "cthresh", "set the area combing threshold used for combed frame detection", OFFSET(cthresh), AV_OPT_TYPE_INT, {.i64= 9}, -1, 0xff, FLAGS },
145 { "chroma", "set whether or not chroma is considered in the combed frame decision", OFFSET(chroma), AV_OPT_TYPE_INT, {.i64= 0}, 0, 1, FLAGS },
146 { "blockx", "set the x-axis size of the window used during combed frame detection", OFFSET(blockx), AV_OPT_TYPE_INT, {.i64=16}, 4, 1<<9, FLAGS },
147 { "blocky", "set the y-axis size of the window used during combed frame detection", OFFSET(blocky), AV_OPT_TYPE_INT, {.i64=16}, 4, 1<<9, FLAGS },
148 { "combpel", "set the number of combed pixels inside any of the blocky by blockx size blocks on the frame for the frame to be detected as combed", OFFSET(combpel), AV_OPT_TYPE_INT, {.i64=80}, 0, INT_MAX, FLAGS },
149 { NULL }
150};
151
152AVFILTER_DEFINE_CLASS(fieldmatch);
153
154static int get_width(const FieldMatchContext *fm, const AVFrame *f, int plane)
155{
156 return plane ? FF_CEIL_RSHIFT(f->width, fm->hsub) : f->width;
157}
158
159static int get_height(const FieldMatchContext *fm, const AVFrame *f, int plane)
160{
161 return plane ? FF_CEIL_RSHIFT(f->height, fm->vsub) : f->height;
162}
163
164static int64_t luma_abs_diff(const AVFrame *f1, const AVFrame *f2)
165{
166 int x, y;
167 const uint8_t *srcp1 = f1->data[0];
168 const uint8_t *srcp2 = f2->data[0];
169 const int src1_linesize = f1->linesize[0];
170 const int src2_linesize = f2->linesize[0];
171 const int width = f1->width;
172 const int height = f1->height;
173 int64_t acc = 0;
174
175 for (y = 0; y < height; y++) {
176 for (x = 0; x < width; x++)
177 acc += abs(srcp1[x] - srcp2[x]);
178 srcp1 += src1_linesize;
179 srcp2 += src2_linesize;
180 }
181 return acc;
182}
183
184static void fill_buf(uint8_t *data, int w, int h, int linesize, uint8_t v)
185{
186 int y;
187
188 for (y = 0; y < h; y++) {
189 memset(data, v, w);
190 data += linesize;
191 }
192}
193
194static int calc_combed_score(const FieldMatchContext *fm, const AVFrame *src)
195{
196 int x, y, plane, max_v = 0;
197 const int cthresh = fm->cthresh;
198 const int cthresh6 = cthresh * 6;
199
200 for (plane = 0; plane < (fm->chroma ? 3 : 1); plane++) {
201 const uint8_t *srcp = src->data[plane];
202 const int src_linesize = src->linesize[plane];
203 const int width = get_width (fm, src, plane);
204 const int height = get_height(fm, src, plane);
205 uint8_t *cmkp = fm->cmask_data[plane];
206 const int cmk_linesize = fm->cmask_linesize[plane];
207
208 if (cthresh < 0) {
209 fill_buf(cmkp, width, height, cmk_linesize, 0xff);
210 continue;
211 }
212 fill_buf(cmkp, width, height, cmk_linesize, 0);
213
214 /* [1 -3 4 -3 1] vertical filter */
215#define FILTER(xm2, xm1, xp1, xp2) \
216 abs( 4 * srcp[x] \
217 -3 * (srcp[x + (xm1)*src_linesize] + srcp[x + (xp1)*src_linesize]) \
218 + (srcp[x + (xm2)*src_linesize] + srcp[x + (xp2)*src_linesize])) > cthresh6
219
220 /* first line */
221 for (x = 0; x < width; x++) {
222 const int s1 = abs(srcp[x] - srcp[x + src_linesize]);
223 if (s1 > cthresh && FILTER(2, 1, 1, 2))
224 cmkp[x] = 0xff;
225 }
226 srcp += src_linesize;
227 cmkp += cmk_linesize;
228
229 /* second line */
230 for (x = 0; x < width; x++) {
231 const int s1 = abs(srcp[x] - srcp[x - src_linesize]);
232 const int s2 = abs(srcp[x] - srcp[x + src_linesize]);
233 if (s1 > cthresh && s2 > cthresh && FILTER(2, -1, 1, 2))
234 cmkp[x] = 0xff;
235 }
236 srcp += src_linesize;
237 cmkp += cmk_linesize;
238
239 /* all lines minus first two and last two */
240 for (y = 2; y < height-2; y++) {
241 for (x = 0; x < width; x++) {
242 const int s1 = abs(srcp[x] - srcp[x - src_linesize]);
243 const int s2 = abs(srcp[x] - srcp[x + src_linesize]);
244 if (s1 > cthresh && s2 > cthresh && FILTER(-2, -1, 1, 2))
245 cmkp[x] = 0xff;
246 }
247 srcp += src_linesize;
248 cmkp += cmk_linesize;
249 }
250
251 /* before-last line */
252 for (x = 0; x < width; x++) {
253 const int s1 = abs(srcp[x] - srcp[x - src_linesize]);
254 const int s2 = abs(srcp[x] - srcp[x + src_linesize]);
255 if (s1 > cthresh && s2 > cthresh && FILTER(-2, -1, 1, -2))
256 cmkp[x] = 0xff;
257 }
258 srcp += src_linesize;
259 cmkp += cmk_linesize;
260
261 /* last line */
262 for (x = 0; x < width; x++) {
263 const int s1 = abs(srcp[x] - srcp[x - src_linesize]);
264 if (s1 > cthresh && FILTER(-2, -1, -1, -2))
265 cmkp[x] = 0xff;
266 }
267 }
268
269 if (fm->chroma) {
270 uint8_t *cmkp = fm->cmask_data[0];
271 uint8_t *cmkpU = fm->cmask_data[1];
272 uint8_t *cmkpV = fm->cmask_data[2];
273 const int width = FF_CEIL_RSHIFT(src->width, fm->hsub);
274 const int height = FF_CEIL_RSHIFT(src->height, fm->vsub);
275 const int cmk_linesize = fm->cmask_linesize[0] << 1;
276 const int cmk_linesizeUV = fm->cmask_linesize[2];
277 uint8_t *cmkpp = cmkp - (cmk_linesize>>1);
278 uint8_t *cmkpn = cmkp + (cmk_linesize>>1);
279 uint8_t *cmkpnn = cmkp + cmk_linesize;
280 for (y = 1; y < height - 1; y++) {
281 cmkpp += cmk_linesize;
282 cmkp += cmk_linesize;
283 cmkpn += cmk_linesize;
284 cmkpnn += cmk_linesize;
285 cmkpV += cmk_linesizeUV;
286 cmkpU += cmk_linesizeUV;
287 for (x = 1; x < width - 1; x++) {
288#define HAS_FF_AROUND(p, lz) (p[x-1 - lz] == 0xff || p[x - lz] == 0xff || p[x+1 - lz] == 0xff || \
289 p[x-1 ] == 0xff || p[x+1 ] == 0xff || \
290 p[x-1 + lz] == 0xff || p[x + lz] == 0xff || p[x+1 + lz] == 0xff)
291 if ((cmkpV[x] == 0xff && HAS_FF_AROUND(cmkpV, cmk_linesizeUV)) ||
292 (cmkpU[x] == 0xff && HAS_FF_AROUND(cmkpU, cmk_linesizeUV))) {
293 ((uint16_t*)cmkp)[x] = 0xffff;
294 ((uint16_t*)cmkpn)[x] = 0xffff;
295 if (y&1) ((uint16_t*)cmkpp)[x] = 0xffff;
296 else ((uint16_t*)cmkpnn)[x] = 0xffff;
297 }
298 }
299 }
300 }
301
302 {
303 const int blockx = fm->blockx;
304 const int blocky = fm->blocky;
305 const int xhalf = blockx/2;
306 const int yhalf = blocky/2;
307 const int cmk_linesize = fm->cmask_linesize[0];
308 const uint8_t *cmkp = fm->cmask_data[0] + cmk_linesize;
309 const int width = src->width;
310 const int height = src->height;
311 const int xblocks = ((width+xhalf)/blockx) + 1;
312 const int xblocks4 = xblocks<<2;
313 const int yblocks = ((height+yhalf)/blocky) + 1;
314 int *c_array = fm->c_array;
315 const int arraysize = (xblocks*yblocks)<<2;
316 int heighta = (height/(blocky/2))*(blocky/2);
317 const int widtha = (width /(blockx/2))*(blockx/2);
318 if (heighta == height)
319 heighta = height - yhalf;
320 memset(c_array, 0, arraysize * sizeof(*c_array));
321
322#define C_ARRAY_ADD(v) do { \
323 const int box1 = (x / blockx) * 4; \
324 const int box2 = ((x + xhalf) / blockx) * 4; \
325 c_array[temp1 + box1 ] += v; \
326 c_array[temp1 + box2 + 1] += v; \
327 c_array[temp2 + box1 + 2] += v; \
328 c_array[temp2 + box2 + 3] += v; \
329} while (0)
330
331#define VERTICAL_HALF(y_start, y_end) do { \
332 for (y = y_start; y < y_end; y++) { \
333 const int temp1 = (y / blocky) * xblocks4; \
334 const int temp2 = ((y + yhalf) / blocky) * xblocks4; \
335 for (x = 0; x < width; x++) \
336 if (cmkp[x - cmk_linesize] == 0xff && \
337 cmkp[x ] == 0xff && \
338 cmkp[x + cmk_linesize] == 0xff) \
339 C_ARRAY_ADD(1); \
340 cmkp += cmk_linesize; \
341 } \
342} while (0)
343
344 VERTICAL_HALF(1, yhalf);
345
346 for (y = yhalf; y < heighta; y += yhalf) {
347 const int temp1 = (y / blocky) * xblocks4;
348 const int temp2 = ((y + yhalf) / blocky) * xblocks4;
349
350 for (x = 0; x < widtha; x += xhalf) {
351 const uint8_t *cmkp_tmp = cmkp + x;
352 int u, v, sum = 0;
353 for (u = 0; u < yhalf; u++) {
354 for (v = 0; v < xhalf; v++)
355 if (cmkp_tmp[v - cmk_linesize] == 0xff &&
356 cmkp_tmp[v ] == 0xff &&
357 cmkp_tmp[v + cmk_linesize] == 0xff)
358 sum++;
359 cmkp_tmp += cmk_linesize;
360 }
361 if (sum)
362 C_ARRAY_ADD(sum);
363 }
364
365 for (x = widtha; x < width; x++) {
366 const uint8_t *cmkp_tmp = cmkp + x;
367 int u, sum = 0;
368 for (u = 0; u < yhalf; u++) {
369 if (cmkp_tmp[-cmk_linesize] == 0xff &&
370 cmkp_tmp[ 0] == 0xff &&
371 cmkp_tmp[ cmk_linesize] == 0xff)
372 sum++;
373 cmkp_tmp += cmk_linesize;
374 }
375 if (sum)
376 C_ARRAY_ADD(sum);
377 }
378
379 cmkp += cmk_linesize * yhalf;
380 }
381
382 VERTICAL_HALF(heighta, height - 1);
383
384 for (x = 0; x < arraysize; x++)
385 if (c_array[x] > max_v)
386 max_v = c_array[x];
387 }
388 return max_v;
389}
390
391// the secret is that tbuffer is an interlaced, offset subset of all the lines
392static void build_abs_diff_mask(const uint8_t *prvp, int prv_linesize,
393 const uint8_t *nxtp, int nxt_linesize,
394 uint8_t *tbuffer, int tbuf_linesize,
395 int width, int height)
396{
397 int y, x;
398
399 prvp -= prv_linesize;
400 nxtp -= nxt_linesize;
401 for (y = 0; y < height; y++) {
402 for (x = 0; x < width; x++)
403 tbuffer[x] = FFABS(prvp[x] - nxtp[x]);
404 prvp += prv_linesize;
405 nxtp += nxt_linesize;
406 tbuffer += tbuf_linesize;
407 }
408}
409
410/**
411 * Build a map over which pixels differ a lot/a little
412 */
413static void build_diff_map(FieldMatchContext *fm,
414 const uint8_t *prvp, int prv_linesize,
415 const uint8_t *nxtp, int nxt_linesize,
416 uint8_t *dstp, int dst_linesize, int height,
417 int width, int plane)
418{
419 int x, y, u, diff, count;
420 int tpitch = plane ? fm->tpitchuv : fm->tpitchy;
421 const uint8_t *dp = fm->tbuffer + tpitch;
422
423 build_abs_diff_mask(prvp, prv_linesize, nxtp, nxt_linesize,
424 fm->tbuffer, tpitch, width, height>>1);
425
426 for (y = 2; y < height - 2; y += 2) {
427 for (x = 1; x < width - 1; x++) {
428 diff = dp[x];
429 if (diff > 3) {
430 for (count = 0, u = x-1; u < x+2 && count < 2; u++) {
431 count += dp[u-tpitch] > 3;
432 count += dp[u ] > 3;
433 count += dp[u+tpitch] > 3;
434 }
435 if (count > 1) {
436 dstp[x] = 1;
437 if (diff > 19) {
438 int upper = 0, lower = 0;
439 for (count = 0, u = x-1; u < x+2 && count < 6; u++) {
440 if (dp[u-tpitch] > 19) { count++; upper = 1; }
441 if (dp[u ] > 19) count++;
442 if (dp[u+tpitch] > 19) { count++; lower = 1; }
443 }
444 if (count > 3) {
445 if (upper && lower) {
446 dstp[x] |= 1<<1;
447 } else {
448 int upper2 = 0, lower2 = 0;
449 for (u = FFMAX(x-4,0); u < FFMIN(x+5,width); u++) {
450 if (y != 2 && dp[u-2*tpitch] > 19) upper2 = 1;
451 if ( dp[u- tpitch] > 19) upper = 1;
452 if ( dp[u+ tpitch] > 19) lower = 1;
453 if (y != height-4 && dp[u+2*tpitch] > 19) lower2 = 1;
454 }
455 if ((upper && (lower || upper2)) ||
456 (lower && (upper || lower2)))
457 dstp[x] |= 1<<1;
458 else if (count > 5)
459 dstp[x] |= 1<<2;
460 }
461 }
462 }
463 }
464 }
465 }
466 dp += tpitch;
467 dstp += dst_linesize;
468 }
469}
470
471enum { mP, mC, mN, mB, mU };
472
473static int get_field_base(int match, int field)
474{
475 return match < 3 ? 2 - field : 1 + field;
476}
477
478static AVFrame *select_frame(FieldMatchContext *fm, int match)
479{
480 if (match == mP || match == mB) return fm->prv;
481 else if (match == mN || match == mU) return fm->nxt;
482 else /* match == mC */ return fm->src;
483}
484
485static int compare_fields(FieldMatchContext *fm, int match1, int match2, int field)
486{
487 int plane, ret;
488 uint64_t accumPc = 0, accumPm = 0, accumPml = 0;
489 uint64_t accumNc = 0, accumNm = 0, accumNml = 0;
490 int norm1, norm2, mtn1, mtn2;
491 float c1, c2, mr;
492 const AVFrame *src = fm->src;
493
494 for (plane = 0; plane < (fm->mchroma ? 3 : 1); plane++) {
495 int x, y, temp1, temp2, fbase;
496 const AVFrame *prev, *next;
497 uint8_t *mapp = fm->map_data[plane];
498 int map_linesize = fm->map_linesize[plane];
499 const uint8_t *srcp = src->data[plane];
500 const int src_linesize = src->linesize[plane];
501 const int srcf_linesize = src_linesize << 1;
502 int prv_linesize, nxt_linesize;
503 int prvf_linesize, nxtf_linesize;
504 const int width = get_width (fm, src, plane);
505 const int height = get_height(fm, src, plane);
506 const int y0a = fm->y0 >> (plane != 0);
507 const int y1a = fm->y1 >> (plane != 0);
508 const int startx = (plane == 0 ? 8 : 4);
509 const int stopx = width - startx;
510 const uint8_t *srcpf, *srcf, *srcnf;
511 const uint8_t *prvpf, *prvnf, *nxtpf, *nxtnf;
512
513 fill_buf(mapp, width, height, map_linesize, 0);
514
515 /* match1 */
516 fbase = get_field_base(match1, field);
517 srcf = srcp + (fbase + 1) * src_linesize;
518 srcpf = srcf - srcf_linesize;
519 srcnf = srcf + srcf_linesize;
520 mapp = mapp + fbase * map_linesize;
521 prev = select_frame(fm, match1);
522 prv_linesize = prev->linesize[plane];
523 prvf_linesize = prv_linesize << 1;
524 prvpf = prev->data[plane] + fbase * prv_linesize; // previous frame, previous field
525 prvnf = prvpf + prvf_linesize; // previous frame, next field
526
527 /* match2 */
528 fbase = get_field_base(match2, field);
529 next = select_frame(fm, match2);
530 nxt_linesize = next->linesize[plane];
531 nxtf_linesize = nxt_linesize << 1;
532 nxtpf = next->data[plane] + fbase * nxt_linesize; // next frame, previous field
533 nxtnf = nxtpf + nxtf_linesize; // next frame, next field
534
535 map_linesize <<= 1;
536 if ((match1 >= 3 && field == 1) || (match1 < 3 && field != 1))
537 build_diff_map(fm, prvpf, prvf_linesize, nxtpf, nxtf_linesize,
538 mapp, map_linesize, height, width, plane);
539 else
540 build_diff_map(fm, prvnf, prvf_linesize, nxtnf, nxtf_linesize,
541 mapp + map_linesize, map_linesize, height, width, plane);
542
543 for (y = 2; y < height - 2; y += 2) {
544 if (y0a == y1a || y < y0a || y > y1a) {
545 for (x = startx; x < stopx; x++) {
546 if (mapp[x] > 0 || mapp[x + map_linesize] > 0) {
547 temp1 = srcpf[x] + (srcf[x] << 2) + srcnf[x]; // [1 4 1]
548
549 temp2 = abs(3 * (prvpf[x] + prvnf[x]) - temp1);
550 if (temp2 > 23 && ((mapp[x]&1) || (mapp[x + map_linesize]&1)))
551 accumPc += temp2;
552 if (temp2 > 42) {
553 if ((mapp[x]&2) || (mapp[x + map_linesize]&2))
554 accumPm += temp2;
555 if ((mapp[x]&4) || (mapp[x + map_linesize]&4))
556 accumPml += temp2;
557 }
558
559 temp2 = abs(3 * (nxtpf[x] + nxtnf[x]) - temp1);
560 if (temp2 > 23 && ((mapp[x]&1) || (mapp[x + map_linesize]&1)))
561 accumNc += temp2;
562 if (temp2 > 42) {
563 if ((mapp[x]&2) || (mapp[x + map_linesize]&2))
564 accumNm += temp2;
565 if ((mapp[x]&4) || (mapp[x + map_linesize]&4))
566 accumNml += temp2;
567 }
568 }
569 }
570 }
571 prvpf += prvf_linesize;
572 prvnf += prvf_linesize;
573 srcpf += srcf_linesize;
574 srcf += srcf_linesize;
575 srcnf += srcf_linesize;
576 nxtpf += nxtf_linesize;
577 nxtnf += nxtf_linesize;
578 mapp += map_linesize;
579 }
580 }
581
582 if (accumPm < 500 && accumNm < 500 && (accumPml >= 500 || accumNml >= 500) &&
583 FFMAX(accumPml,accumNml) > 3*FFMIN(accumPml,accumNml)) {
584 accumPm = accumPml;
585 accumNm = accumNml;
586 }
587
588 norm1 = (int)((accumPc / 6.0f) + 0.5f);
589 norm2 = (int)((accumNc / 6.0f) + 0.5f);
590 mtn1 = (int)((accumPm / 6.0f) + 0.5f);
591 mtn2 = (int)((accumNm / 6.0f) + 0.5f);
592 c1 = ((float)FFMAX(norm1,norm2)) / ((float)FFMAX(FFMIN(norm1,norm2),1));
593 c2 = ((float)FFMAX(mtn1, mtn2)) / ((float)FFMAX(FFMIN(mtn1, mtn2), 1));
594 mr = ((float)FFMAX(mtn1, mtn2)) / ((float)FFMAX(FFMAX(norm1,norm2),1));
595 if (((mtn1 >= 500 || mtn2 >= 500) && (mtn1*2 < mtn2*1 || mtn2*2 < mtn1*1)) ||
596 ((mtn1 >= 1000 || mtn2 >= 1000) && (mtn1*3 < mtn2*2 || mtn2*3 < mtn1*2)) ||
597 ((mtn1 >= 2000 || mtn2 >= 2000) && (mtn1*5 < mtn2*4 || mtn2*5 < mtn1*4)) ||
598 ((mtn1 >= 4000 || mtn2 >= 4000) && c2 > c1))
599 ret = mtn1 > mtn2 ? match2 : match1;
600 else if (mr > 0.005 && FFMAX(mtn1, mtn2) > 150 && (mtn1*2 < mtn2*1 || mtn2*2 < mtn1*1))
601 ret = mtn1 > mtn2 ? match2 : match1;
602 else
603 ret = norm1 > norm2 ? match2 : match1;
604 return ret;
605}
606
607static void copy_fields(const FieldMatchContext *fm, AVFrame *dst,
608 const AVFrame *src, int field)
609{
610 int plane;
611 for (plane = 0; plane < 4 && src->data[plane] && src->linesize[plane]; plane++)
612 av_image_copy_plane(dst->data[plane] + field*dst->linesize[plane], dst->linesize[plane] << 1,
613 src->data[plane] + field*src->linesize[plane], src->linesize[plane] << 1,
614 get_width(fm, src, plane), get_height(fm, src, plane) / 2);
615}
616
617static AVFrame *create_weave_frame(AVFilterContext *ctx, int match, int field,
618 const AVFrame *prv, AVFrame *src, const AVFrame *nxt)
619{
620 AVFrame *dst;
621 FieldMatchContext *fm = ctx->priv;
622
623 if (match == mC) {
624 dst = av_frame_clone(src);
625 } else {
626 AVFilterLink *outlink = ctx->outputs[0];
627
628 dst = ff_get_video_buffer(outlink, outlink->w, outlink->h);
629 if (!dst)
630 return NULL;
631 av_frame_copy_props(dst, src);
632
633 switch (match) {
634 case mP: copy_fields(fm, dst, src, 1-field); copy_fields(fm, dst, prv, field); break;
635 case mN: copy_fields(fm, dst, src, 1-field); copy_fields(fm, dst, nxt, field); break;
636 case mB: copy_fields(fm, dst, src, field); copy_fields(fm, dst, prv, 1-field); break;
637 case mU: copy_fields(fm, dst, src, field); copy_fields(fm, dst, nxt, 1-field); break;
638 default: av_assert0(0);
639 }
640 }
641 return dst;
642}
643
644static int checkmm(AVFilterContext *ctx, int *combs, int m1, int m2,
645 AVFrame **gen_frames, int field)
646{
647 const FieldMatchContext *fm = ctx->priv;
648
649#define LOAD_COMB(mid) do { \
650 if (combs[mid] < 0) { \
651 if (!gen_frames[mid]) \
652 gen_frames[mid] = create_weave_frame(ctx, mid, field, \
653 fm->prv, fm->src, fm->nxt); \
654 combs[mid] = calc_combed_score(fm, gen_frames[mid]); \
655 } \
656} while (0)
657
658 LOAD_COMB(m1);
659 LOAD_COMB(m2);
660
661 if ((combs[m2] * 3 < combs[m1] || (combs[m2] * 2 < combs[m1] && combs[m1] > fm->combpel)) &&
662 abs(combs[m2] - combs[m1]) >= 30 && combs[m2] < fm->combpel)
663 return m2;
664 else
665 return m1;
666}
667
668static const int fxo0m[] = { mP, mC, mN, mB, mU };
669static const int fxo1m[] = { mN, mC, mP, mU, mB };
670
671static int filter_frame(AVFilterLink *inlink, AVFrame *in)
672{
673 AVFilterContext *ctx = inlink->dst;
674 AVFilterLink *outlink = ctx->outputs[0];
675 FieldMatchContext *fm = ctx->priv;
676 int combs[] = { -1, -1, -1, -1, -1 };
677 int order, field, i, match, sc = 0;
678 const int *fxo;
679 AVFrame *gen_frames[] = { NULL, NULL, NULL, NULL, NULL };
680 AVFrame *dst;
681
682 /* update frames queue(s) */
683#define SLIDING_FRAME_WINDOW(prv, src, nxt) do { \
684 if (prv != src) /* 2nd loop exception (1st has prv==src and we don't want to loose src) */ \
685 av_frame_free(&prv); \
686 prv = src; \
687 src = nxt; \
688 if (in) \
689 nxt = in; \
690 if (!prv) \
691 prv = src; \
692 if (!prv) /* received only one frame at that point */ \
693 return 0; \
694 av_assert0(prv && src && nxt); \
695} while (0)
696 if (FF_INLINK_IDX(inlink) == INPUT_MAIN) {
697 SLIDING_FRAME_WINDOW(fm->prv, fm->src, fm->nxt);
698 fm->got_frame[INPUT_MAIN] = 1;
699 } else {
700 SLIDING_FRAME_WINDOW(fm->prv2, fm->src2, fm->nxt2);
701 fm->got_frame[INPUT_CLEANSRC] = 1;
702 }
703 if (!fm->got_frame[INPUT_MAIN] || (fm->ppsrc && !fm->got_frame[INPUT_CLEANSRC]))
704 return 0;
705 fm->got_frame[INPUT_MAIN] = fm->got_frame[INPUT_CLEANSRC] = 0;
706 in = fm->src;
707
708 /* parity */
709 order = fm->order != FM_PARITY_AUTO ? fm->order : (in->interlaced_frame ? in->top_field_first : 1);
710 field = fm->field != FM_PARITY_AUTO ? fm->field : order;
711 av_assert0(order == 0 || order == 1 || field == 0 || field == 1);
712 fxo = field ^ order ? fxo1m : fxo0m;
713
714 /* debug mode: we generate all the fields combinations and their associated
715 * combed score. XXX: inject as frame metadata? */
716 if (fm->combdbg) {
717 for (i = 0; i < FF_ARRAY_ELEMS(combs); i++) {
718 if (i > mN && fm->combdbg == COMBDBG_PCN)
719 break;
720 gen_frames[i] = create_weave_frame(ctx, i, field, fm->prv, fm->src, fm->nxt);
721 if (!gen_frames[i])
722 return AVERROR(ENOMEM);
723 combs[i] = calc_combed_score(fm, gen_frames[i]);
724 }
725 av_log(ctx, AV_LOG_INFO, "COMBS: %3d %3d %3d %3d %3d\n",
726 combs[0], combs[1], combs[2], combs[3], combs[4]);
727 } else {
728 gen_frames[mC] = av_frame_clone(fm->src);
729 if (!gen_frames[mC])
730 return AVERROR(ENOMEM);
731 }
732
733 /* p/c selection and optional 3-way p/c/n matches */
734 match = compare_fields(fm, fxo[mC], fxo[mP], field);
735 if (fm->mode == MODE_PCN || fm->mode == MODE_PCN_UB)
736 match = compare_fields(fm, match, fxo[mN], field);
737
738 /* scene change check */
739 if (fm->combmatch == COMBMATCH_SC) {
740 if (fm->lastn == outlink->frame_count - 1) {
741 if (fm->lastscdiff > fm->scthresh)
742 sc = 1;
743 } else if (luma_abs_diff(fm->prv, fm->src) > fm->scthresh) {
744 sc = 1;
745 }
746
747 if (!sc) {
748 fm->lastn = outlink->frame_count;
749 fm->lastscdiff = luma_abs_diff(fm->src, fm->nxt);
750 sc = fm->lastscdiff > fm->scthresh;
751 }
752 }
753
754 if (fm->combmatch == COMBMATCH_FULL || (fm->combmatch == COMBMATCH_SC && sc)) {
755 switch (fm->mode) {
756 /* 2-way p/c matches */
757 case MODE_PC:
758 match = checkmm(ctx, combs, match, match == fxo[mP] ? fxo[mC] : fxo[mP], gen_frames, field);
759 break;
760 case MODE_PC_N:
761 match = checkmm(ctx, combs, match, fxo[mN], gen_frames, field);
762 break;
763 case MODE_PC_U:
764 match = checkmm(ctx, combs, match, fxo[mU], gen_frames, field);
765 break;
766 case MODE_PC_N_UB:
767 match = checkmm(ctx, combs, match, fxo[mN], gen_frames, field);
768 match = checkmm(ctx, combs, match, fxo[mU], gen_frames, field);
769 match = checkmm(ctx, combs, match, fxo[mB], gen_frames, field);
770 break;
771 /* 3-way p/c/n matches */
772 case MODE_PCN:
773 match = checkmm(ctx, combs, match, match == fxo[mP] ? fxo[mC] : fxo[mP], gen_frames, field);
774 break;
775 case MODE_PCN_UB:
776 match = checkmm(ctx, combs, match, fxo[mU], gen_frames, field);
777 match = checkmm(ctx, combs, match, fxo[mB], gen_frames, field);
778 break;
779 default:
780 av_assert0(0);
781 }
782 }
783
784 /* get output frame and drop the others */
785 if (fm->ppsrc) {
786 /* field matching was based on a filtered/post-processed input, we now
787 * pick the untouched fields from the clean source */
788 dst = create_weave_frame(ctx, match, field, fm->prv2, fm->src2, fm->nxt2);
789 } else {
790 if (!gen_frames[match]) { // XXX: is that possible?
791 dst = create_weave_frame(ctx, match, field, fm->prv, fm->src, fm->nxt);
792 } else {
793 dst = gen_frames[match];
794 gen_frames[match] = NULL;
795 }
796 }
797 if (!dst)
798 return AVERROR(ENOMEM);
799 for (i = 0; i < FF_ARRAY_ELEMS(gen_frames); i++)
800 av_frame_free(&gen_frames[i]);
801
802 /* mark the frame we are unable to match properly as interlaced so a proper
803 * de-interlacer can take the relay */
804 dst->interlaced_frame = combs[match] >= fm->combpel;
805 if (dst->interlaced_frame) {
806 av_log(ctx, AV_LOG_WARNING, "Frame #%"PRId64" at %s is still interlaced\n",
807 outlink->frame_count, av_ts2timestr(in->pts, &inlink->time_base));
808 dst->top_field_first = field;
809 }
810
811 av_log(ctx, AV_LOG_DEBUG, "SC:%d | COMBS: %3d %3d %3d %3d %3d (combpel=%d)"
812 " match=%d combed=%s\n", sc, combs[0], combs[1], combs[2], combs[3], combs[4],
813 fm->combpel, match, dst->interlaced_frame ? "YES" : "NO");
814
815 return ff_filter_frame(outlink, dst);
816}
817
818static int request_inlink(AVFilterContext *ctx, int lid)
819{
820 int ret = 0;
821 FieldMatchContext *fm = ctx->priv;
822
823 if (!fm->got_frame[lid]) {
824 AVFilterLink *inlink = ctx->inputs[lid];
825 ret = ff_request_frame(inlink);
826 if (ret == AVERROR_EOF) { // flushing
827 fm->eof |= 1 << lid;
828 ret = filter_frame(inlink, NULL);
829 }
830 }
831 return ret;
832}
833
834static int request_frame(AVFilterLink *outlink)
835{
836 int ret;
837 AVFilterContext *ctx = outlink->src;
838 FieldMatchContext *fm = ctx->priv;
839 const uint32_t eof_mask = 1<<INPUT_MAIN | fm->ppsrc<<INPUT_CLEANSRC;
840
841 if ((fm->eof & eof_mask) == eof_mask) // flush done?
842 return AVERROR_EOF;
843 if ((ret = request_inlink(ctx, INPUT_MAIN)) < 0)
844 return ret;
845 if (fm->ppsrc && (ret = request_inlink(ctx, INPUT_CLEANSRC)) < 0)
846 return ret;
847 return 0;
848}
849
850static int query_formats(AVFilterContext *ctx)
851{
852 // TODO: second input source can support >8bit depth
853 static const enum AVPixelFormat pix_fmts[] = {
854 AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P,
855 AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
856 AV_PIX_FMT_NONE
857 };
858 ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
859 return 0;
860}
861
862static int config_input(AVFilterLink *inlink)
863{
864 int ret;
865 AVFilterContext *ctx = inlink->dst;
866 FieldMatchContext *fm = ctx->priv;
867 const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink->format);
868 const int w = inlink->w;
869 const int h = inlink->h;
870
871 fm->scthresh = (int64_t)((w * h * 255.0 * fm->scthresh_flt) / 100.0);
872
873 if ((ret = av_image_alloc(fm->map_data, fm->map_linesize, w, h, inlink->format, 32)) < 0 ||
874 (ret = av_image_alloc(fm->cmask_data, fm->cmask_linesize, w, h, inlink->format, 32)) < 0)
875 return ret;
876
877 fm->hsub = pix_desc->log2_chroma_w;
878 fm->vsub = pix_desc->log2_chroma_h;
879
880 fm->tpitchy = FFALIGN(w, 16);
881 fm->tpitchuv = FFALIGN(w >> 1, 16);
882
883 fm->tbuffer = av_malloc(h/2 * fm->tpitchy);
884 fm->c_array = av_malloc((((w + fm->blockx/2)/fm->blockx)+1) *
885 (((h + fm->blocky/2)/fm->blocky)+1) *
886 4 * sizeof(*fm->c_array));
887 if (!fm->tbuffer || !fm->c_array)
888 return AVERROR(ENOMEM);
889
890 return 0;
891}
892
893static av_cold int fieldmatch_init(AVFilterContext *ctx)
894{
895 const FieldMatchContext *fm = ctx->priv;
896 AVFilterPad pad = {
897 .name = av_strdup("main"),
898 .type = AVMEDIA_TYPE_VIDEO,
899 .filter_frame = filter_frame,
900 .config_props = config_input,
901 };
902
903 if (!pad.name)
904 return AVERROR(ENOMEM);
905 ff_insert_inpad(ctx, INPUT_MAIN, &pad);
906
907 if (fm->ppsrc) {
908 pad.name = av_strdup("clean_src");
909 pad.config_props = NULL;
910 if (!pad.name)
911 return AVERROR(ENOMEM);
912 ff_insert_inpad(ctx, INPUT_CLEANSRC, &pad);
913 }
914
915 if ((fm->blockx & (fm->blockx - 1)) ||
916 (fm->blocky & (fm->blocky - 1))) {
917 av_log(ctx, AV_LOG_ERROR, "blockx and blocky settings must be power of two\n");
918 return AVERROR(EINVAL);
919 }
920
921 if (fm->combpel > fm->blockx * fm->blocky) {
922 av_log(ctx, AV_LOG_ERROR, "Combed pixel should not be larger than blockx x blocky\n");
923 return AVERROR(EINVAL);
924 }
925
926 return 0;
927}
928
929static av_cold void fieldmatch_uninit(AVFilterContext *ctx)
930{
931 int i;
932 FieldMatchContext *fm = ctx->priv;
933
934 if (fm->prv != fm->src)
935 av_frame_free(&fm->prv);
936 if (fm->nxt != fm->src)
937 av_frame_free(&fm->nxt);
938 av_frame_free(&fm->src);
939 av_freep(&fm->map_data[0]);
940 av_freep(&fm->cmask_data[0]);
941 av_freep(&fm->tbuffer);
942 av_freep(&fm->c_array);
943 for (i = 0; i < ctx->nb_inputs; i++)
944 av_freep(&ctx->input_pads[i].name);
945}
946
947static int config_output(AVFilterLink *outlink)
948{
949 AVFilterContext *ctx = outlink->src;
950 const FieldMatchContext *fm = ctx->priv;
951 const AVFilterLink *inlink =
952 ctx->inputs[fm->ppsrc ? INPUT_CLEANSRC : INPUT_MAIN];
953
954 outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP;
955 outlink->time_base = inlink->time_base;
956 outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
957 outlink->frame_rate = inlink->frame_rate;
958 outlink->w = inlink->w;
959 outlink->h = inlink->h;
960 return 0;
961}
962
963static const AVFilterPad fieldmatch_outputs[] = {
964 {
965 .name = "default",
966 .type = AVMEDIA_TYPE_VIDEO,
967 .request_frame = request_frame,
968 .config_props = config_output,
969 },
970 { NULL }
971};
972
973AVFilter ff_vf_fieldmatch = {
974 .name = "fieldmatch",
975 .description = NULL_IF_CONFIG_SMALL("Field matching for inverse telecine."),
976 .query_formats = query_formats,
977 .priv_size = sizeof(FieldMatchContext),
978 .init = fieldmatch_init,
979 .uninit = fieldmatch_uninit,
980 .inputs = NULL,
981 .outputs = fieldmatch_outputs,
982 .priv_class = &fieldmatch_class,
983 .flags = AVFILTER_FLAG_DYNAMIC_INPUTS,
984};
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