02feeb213cef30bb9e5a8f05878da7d43249805d
[libav.git] / libavfilter / vf_yadif.c
1 /*
2 * Copyright (C) 2006-2010 Michael Niedermayer <michaelni@gmx.at>
3 * 2010 James Darnley <james.darnley@gmail.com>
4 *
5 * This file is part of Libav.
6 *
7 * Libav is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * Libav 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
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License along
18 * with Libav; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
20 */
21
22 #include "libavutil/cpu.h"
23 #include "libavutil/common.h"
24 #include "libavutil/pixdesc.h"
25 #include "avfilter.h"
26 #include "formats.h"
27 #include "internal.h"
28 #include "video.h"
29 #include "yadif.h"
30
31 #undef NDEBUG
32 #include <assert.h>
33
34 #define CHECK(j)\
35 { int score = FFABS(cur[mrefs-1+(j)] - cur[prefs-1-(j)])\
36 + FFABS(cur[mrefs +(j)] - cur[prefs -(j)])\
37 + FFABS(cur[mrefs+1+(j)] - cur[prefs+1-(j)]);\
38 if (score < spatial_score) {\
39 spatial_score= score;\
40 spatial_pred= (cur[mrefs +(j)] + cur[prefs -(j)])>>1;\
41
42 #define FILTER \
43 for (x = 0; x < w; x++) { \
44 int c = cur[mrefs]; \
45 int d = (prev2[0] + next2[0])>>1; \
46 int e = cur[prefs]; \
47 int temporal_diff0 = FFABS(prev2[0] - next2[0]); \
48 int temporal_diff1 =(FFABS(prev[mrefs] - c) + FFABS(prev[prefs] - e) )>>1; \
49 int temporal_diff2 =(FFABS(next[mrefs] - c) + FFABS(next[prefs] - e) )>>1; \
50 int diff = FFMAX3(temporal_diff0>>1, temporal_diff1, temporal_diff2); \
51 int spatial_pred = (c+e)>>1; \
52 int spatial_score = FFABS(cur[mrefs-1] - cur[prefs-1]) + FFABS(c-e) \
53 + FFABS(cur[mrefs+1] - cur[prefs+1]) - 1; \
54 \
55 CHECK(-1) CHECK(-2) }} }} \
56 CHECK( 1) CHECK( 2) }} }} \
57 \
58 if (mode < 2) { \
59 int b = (prev2[2*mrefs] + next2[2*mrefs])>>1; \
60 int f = (prev2[2*prefs] + next2[2*prefs])>>1; \
61 int max = FFMAX3(d-e, d-c, FFMIN(b-c, f-e)); \
62 int min = FFMIN3(d-e, d-c, FFMAX(b-c, f-e)); \
63 \
64 diff = FFMAX3(diff, min, -max); \
65 } \
66 \
67 if (spatial_pred > d + diff) \
68 spatial_pred = d + diff; \
69 else if (spatial_pred < d - diff) \
70 spatial_pred = d - diff; \
71 \
72 dst[0] = spatial_pred; \
73 \
74 dst++; \
75 cur++; \
76 prev++; \
77 next++; \
78 prev2++; \
79 next2++; \
80 }
81
82 static void filter_line_c(uint8_t *dst,
83 uint8_t *prev, uint8_t *cur, uint8_t *next,
84 int w, int prefs, int mrefs, int parity, int mode)
85 {
86 int x;
87 uint8_t *prev2 = parity ? prev : cur ;
88 uint8_t *next2 = parity ? cur : next;
89
90 FILTER
91 }
92
93 static void filter_line_c_16bit(uint16_t *dst,
94 uint16_t *prev, uint16_t *cur, uint16_t *next,
95 int w, int prefs, int mrefs, int parity, int mode)
96 {
97 int x;
98 uint16_t *prev2 = parity ? prev : cur ;
99 uint16_t *next2 = parity ? cur : next;
100 mrefs /= 2;
101 prefs /= 2;
102
103 FILTER
104 }
105
106 static void filter(AVFilterContext *ctx, AVFilterBufferRef *dstpic,
107 int parity, int tff)
108 {
109 YADIFContext *yadif = ctx->priv;
110 int y, i;
111
112 for (i = 0; i < yadif->csp->nb_components; i++) {
113 int w = dstpic->video->w;
114 int h = dstpic->video->h;
115 int refs = yadif->cur->linesize[i];
116 int df = (yadif->csp->comp[i].depth_minus1 + 8) / 8;
117
118 if (i == 1 || i == 2) {
119 /* Why is this not part of the per-plane description thing? */
120 w >>= yadif->csp->log2_chroma_w;
121 h >>= yadif->csp->log2_chroma_h;
122 }
123
124 for (y = 0; y < h; y++) {
125 if ((y ^ parity) & 1) {
126 uint8_t *prev = &yadif->prev->data[i][y*refs];
127 uint8_t *cur = &yadif->cur ->data[i][y*refs];
128 uint8_t *next = &yadif->next->data[i][y*refs];
129 uint8_t *dst = &dstpic->data[i][y*dstpic->linesize[i]];
130 int mode = y==1 || y+2==h ? 2 : yadif->mode;
131 yadif->filter_line(dst, prev, cur, next, w, y+1<h ? refs : -refs, y ? -refs : refs, parity ^ tff, mode);
132 } else {
133 memcpy(&dstpic->data[i][y*dstpic->linesize[i]],
134 &yadif->cur->data[i][y*refs], w*df);
135 }
136 }
137 }
138
139 emms_c();
140 }
141
142 static AVFilterBufferRef *get_video_buffer(AVFilterLink *link, int perms, int w, int h)
143 {
144 AVFilterBufferRef *picref;
145 int width = FFALIGN(w, 32);
146 int height= FFALIGN(h+2, 32);
147 int i;
148
149 picref = ff_default_get_video_buffer(link, perms, width, height);
150
151 picref->video->w = w;
152 picref->video->h = h;
153
154 for (i = 0; i < 3; i++)
155 picref->data[i] += picref->linesize[i];
156
157 return picref;
158 }
159
160 static void return_frame(AVFilterContext *ctx, int is_second)
161 {
162 YADIFContext *yadif = ctx->priv;
163 AVFilterLink *link= ctx->outputs[0];
164 int tff;
165
166 if (yadif->parity == -1) {
167 tff = yadif->cur->video->interlaced ?
168 yadif->cur->video->top_field_first : 1;
169 } else {
170 tff = yadif->parity^1;
171 }
172
173 if (is_second) {
174 yadif->out = ff_get_video_buffer(link, AV_PERM_WRITE | AV_PERM_PRESERVE |
175 AV_PERM_REUSE, link->w, link->h);
176 avfilter_copy_buffer_ref_props(yadif->out, yadif->cur);
177 yadif->out->video->interlaced = 0;
178 }
179
180 if (!yadif->csp)
181 yadif->csp = &av_pix_fmt_descriptors[link->format];
182 if (yadif->csp->comp[0].depth_minus1 / 8 == 1)
183 yadif->filter_line = filter_line_c_16bit;
184
185 filter(ctx, yadif->out, tff ^ !is_second, tff);
186
187 if (is_second) {
188 int64_t cur_pts = yadif->cur->pts;
189 int64_t next_pts = yadif->next->pts;
190
191 if (next_pts != AV_NOPTS_VALUE && cur_pts != AV_NOPTS_VALUE) {
192 yadif->out->pts = cur_pts + next_pts;
193 } else {
194 yadif->out->pts = AV_NOPTS_VALUE;
195 }
196 ff_start_frame(ctx->outputs[0], yadif->out);
197 }
198 ff_draw_slice(ctx->outputs[0], 0, link->h, 1);
199 ff_end_frame(ctx->outputs[0]);
200
201 yadif->frame_pending = (yadif->mode&1) && !is_second;
202 }
203
204 static void start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
205 {
206 AVFilterContext *ctx = link->dst;
207 YADIFContext *yadif = ctx->priv;
208
209 if (yadif->frame_pending)
210 return_frame(ctx, 1);
211
212 if (yadif->prev)
213 avfilter_unref_buffer(yadif->prev);
214 yadif->prev = yadif->cur;
215 yadif->cur = yadif->next;
216 yadif->next = picref;
217
218 if (!yadif->cur)
219 return;
220
221 if (yadif->auto_enable && !yadif->cur->video->interlaced) {
222 yadif->out = avfilter_ref_buffer(yadif->cur, AV_PERM_READ);
223 avfilter_unref_buffer(yadif->prev);
224 yadif->prev = NULL;
225 if (yadif->out->pts != AV_NOPTS_VALUE)
226 yadif->out->pts *= 2;
227 ff_start_frame(ctx->outputs[0], yadif->out);
228 return;
229 }
230
231 if (!yadif->prev)
232 yadif->prev = avfilter_ref_buffer(yadif->cur, AV_PERM_READ);
233
234 yadif->out = ff_get_video_buffer(ctx->outputs[0], AV_PERM_WRITE | AV_PERM_PRESERVE |
235 AV_PERM_REUSE, link->w, link->h);
236
237 avfilter_copy_buffer_ref_props(yadif->out, yadif->cur);
238 yadif->out->video->interlaced = 0;
239 if (yadif->out->pts != AV_NOPTS_VALUE)
240 yadif->out->pts *= 2;
241 ff_start_frame(ctx->outputs[0], yadif->out);
242 }
243
244 static void end_frame(AVFilterLink *link)
245 {
246 AVFilterContext *ctx = link->dst;
247 YADIFContext *yadif = ctx->priv;
248
249 if (!yadif->out)
250 return;
251
252 if (yadif->auto_enable && !yadif->cur->video->interlaced) {
253 ff_draw_slice(ctx->outputs[0], 0, link->h, 1);
254 ff_end_frame(ctx->outputs[0]);
255 return;
256 }
257
258 return_frame(ctx, 0);
259 }
260
261 static int request_frame(AVFilterLink *link)
262 {
263 AVFilterContext *ctx = link->src;
264 YADIFContext *yadif = ctx->priv;
265
266 if (yadif->frame_pending) {
267 return_frame(ctx, 1);
268 return 0;
269 }
270
271 do {
272 int ret;
273
274 if (yadif->eof)
275 return AVERROR_EOF;
276
277 ret = ff_request_frame(link->src->inputs[0]);
278
279 if (ret == AVERROR_EOF && yadif->next) {
280 AVFilterBufferRef *next = avfilter_ref_buffer(yadif->next, AV_PERM_READ);
281 next->pts = yadif->next->pts * 2 - yadif->cur->pts;
282
283 start_frame(link->src->inputs[0], next);
284 end_frame(link->src->inputs[0]);
285 yadif->eof = 1;
286 } else if (ret < 0) {
287 return ret;
288 }
289 } while (!yadif->cur);
290
291 return 0;
292 }
293
294 static int poll_frame(AVFilterLink *link)
295 {
296 YADIFContext *yadif = link->src->priv;
297 int ret, val;
298
299 if (yadif->frame_pending)
300 return 1;
301
302 val = ff_poll_frame(link->src->inputs[0]);
303 if (val <= 0)
304 return val;
305
306 if (val==1 && !yadif->next) { //FIXME change API to not requre this red tape
307 if ((ret = ff_request_frame(link->src->inputs[0])) < 0)
308 return ret;
309 val = ff_poll_frame(link->src->inputs[0]);
310 if (val <= 0)
311 return val;
312 }
313 assert(yadif->next || !val);
314
315 if (yadif->auto_enable && yadif->next && !yadif->next->video->interlaced)
316 return val;
317
318 return val * ((yadif->mode&1)+1);
319 }
320
321 static av_cold void uninit(AVFilterContext *ctx)
322 {
323 YADIFContext *yadif = ctx->priv;
324
325 if (yadif->prev) avfilter_unref_buffer(yadif->prev);
326 if (yadif->cur ) avfilter_unref_buffer(yadif->cur );
327 if (yadif->next) avfilter_unref_buffer(yadif->next);
328 }
329
330 static int query_formats(AVFilterContext *ctx)
331 {
332 static const enum PixelFormat pix_fmts[] = {
333 PIX_FMT_YUV420P,
334 PIX_FMT_YUV422P,
335 PIX_FMT_YUV444P,
336 PIX_FMT_YUV410P,
337 PIX_FMT_YUV411P,
338 PIX_FMT_GRAY8,
339 PIX_FMT_YUVJ420P,
340 PIX_FMT_YUVJ422P,
341 PIX_FMT_YUVJ444P,
342 AV_NE( PIX_FMT_GRAY16BE, PIX_FMT_GRAY16LE ),
343 PIX_FMT_YUV440P,
344 PIX_FMT_YUVJ440P,
345 AV_NE( PIX_FMT_YUV420P10BE, PIX_FMT_YUV420P10LE ),
346 AV_NE( PIX_FMT_YUV422P10BE, PIX_FMT_YUV422P10LE ),
347 AV_NE( PIX_FMT_YUV444P10BE, PIX_FMT_YUV444P10LE ),
348 AV_NE( PIX_FMT_YUV420P16BE, PIX_FMT_YUV420P16LE ),
349 AV_NE( PIX_FMT_YUV422P16BE, PIX_FMT_YUV422P16LE ),
350 AV_NE( PIX_FMT_YUV444P16BE, PIX_FMT_YUV444P16LE ),
351 PIX_FMT_YUVA420P,
352 PIX_FMT_NONE
353 };
354
355 ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
356
357 return 0;
358 }
359
360 static av_cold int init(AVFilterContext *ctx, const char *args)
361 {
362 YADIFContext *yadif = ctx->priv;
363
364 yadif->mode = 0;
365 yadif->parity = -1;
366 yadif->auto_enable = 0;
367 yadif->csp = NULL;
368
369 if (args) sscanf(args, "%d:%d:%d", &yadif->mode, &yadif->parity, &yadif->auto_enable);
370
371 yadif->filter_line = filter_line_c;
372
373 if (HAVE_MMX)
374 ff_yadif_init_x86(yadif);
375
376 av_log(ctx, AV_LOG_VERBOSE, "mode:%d parity:%d auto_enable:%d\n", yadif->mode, yadif->parity, yadif->auto_enable);
377
378 return 0;
379 }
380
381 static void null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir) { }
382
383 static int config_props(AVFilterLink *link)
384 {
385 link->time_base.num = link->src->inputs[0]->time_base.num;
386 link->time_base.den = link->src->inputs[0]->time_base.den * 2;
387 link->w = link->src->inputs[0]->w;
388 link->h = link->src->inputs[0]->h;
389
390 return 0;
391 }
392
393 AVFilter avfilter_vf_yadif = {
394 .name = "yadif",
395 .description = NULL_IF_CONFIG_SMALL("Deinterlace the input image"),
396
397 .priv_size = sizeof(YADIFContext),
398 .init = init,
399 .uninit = uninit,
400 .query_formats = query_formats,
401
402 .inputs = (const AVFilterPad[]) {{ .name = "default",
403 .type = AVMEDIA_TYPE_VIDEO,
404 .start_frame = start_frame,
405 .get_video_buffer = get_video_buffer,
406 .draw_slice = null_draw_slice,
407 .end_frame = end_frame, },
408 { .name = NULL}},
409
410 .outputs = (const AVFilterPad[]) {{ .name = "default",
411 .type = AVMEDIA_TYPE_VIDEO,
412 .poll_frame = poll_frame,
413 .request_frame = request_frame,
414 .config_props = config_props, },
415 { .name = NULL}},
416 };