2 * Copyright (C) 2006-2010 Michael Niedermayer <michaelni@gmx.at>
3 * 2010 James Darnley <james.darnley@gmail.com>
5 * This file is part of Libav.
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.
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.
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.
22 #include "libavutil/cpu.h"
23 #include "libavutil/common.h"
24 #include "libavutil/pixdesc.h"
34 * 0: send 1 frame for each frame
35 * 1: send 1 frame for each field
36 * 2: like 0 but skips spatial interlacing check
37 * 3: like 1 but skips spatial interlacing check
43 * 1: bottom field first
51 * 0: deinterlace all frames
52 * 1: only deinterlace frames marked as interlaced
56 AVFilterBufferRef *cur;
57 AVFilterBufferRef *next;
58 AVFilterBufferRef *prev;
59 AVFilterBufferRef *out;
60 void (*filter_line)(uint8_t *dst,
61 uint8_t *prev, uint8_t *cur, uint8_t *next,
62 int w, int prefs, int mrefs, int parity, int mode);
64 const AVPixFmtDescriptor *csp;
69 { int score = FFABS(cur[mrefs-1+(j)] - cur[prefs-1-(j)])\
70 + FFABS(cur[mrefs +(j)] - cur[prefs -(j)])\
71 + FFABS(cur[mrefs+1+(j)] - cur[prefs+1-(j)]);\
72 if (score < spatial_score) {\
73 spatial_score= score;\
74 spatial_pred= (cur[mrefs +(j)] + cur[prefs -(j)])>>1;\
77 for (x = 0; x < w; x++) { \
79 int d = (prev2[0] + next2[0])>>1; \
81 int temporal_diff0 = FFABS(prev2[0] - next2[0]); \
82 int temporal_diff1 =(FFABS(prev[mrefs] - c) + FFABS(prev[prefs] - e) )>>1; \
83 int temporal_diff2 =(FFABS(next[mrefs] - c) + FFABS(next[prefs] - e) )>>1; \
84 int diff = FFMAX3(temporal_diff0>>1, temporal_diff1, temporal_diff2); \
85 int spatial_pred = (c+e)>>1; \
86 int spatial_score = FFABS(cur[mrefs-1] - cur[prefs-1]) + FFABS(c-e) \
87 + FFABS(cur[mrefs+1] - cur[prefs+1]) - 1; \
89 CHECK(-1) CHECK(-2) }} }} \
90 CHECK( 1) CHECK( 2) }} }} \
93 int b = (prev2[2*mrefs] + next2[2*mrefs])>>1; \
94 int f = (prev2[2*prefs] + next2[2*prefs])>>1; \
95 int max = FFMAX3(d-e, d-c, FFMIN(b-c, f-e)); \
96 int min = FFMIN3(d-e, d-c, FFMAX(b-c, f-e)); \
98 diff = FFMAX3(diff, min, -max); \
101 if (spatial_pred > d + diff) \
102 spatial_pred = d + diff; \
103 else if (spatial_pred < d - diff) \
104 spatial_pred = d - diff; \
106 dst[0] = spatial_pred; \
116 static void filter_line_c(uint8_t *dst,
117 uint8_t *prev, uint8_t *cur, uint8_t *next,
118 int w, int prefs, int mrefs, int parity, int mode)
121 uint8_t *prev2 = parity ? prev : cur ;
122 uint8_t *next2 = parity ? cur : next;
127 static void filter_line_c_16bit(uint16_t *dst,
128 uint16_t *prev, uint16_t *cur, uint16_t *next,
129 int w, int prefs, int mrefs, int parity, int mode)
132 uint16_t *prev2 = parity ? prev : cur ;
133 uint16_t *next2 = parity ? cur : next;
140 static void filter(AVFilterContext *ctx, AVFilterBufferRef *dstpic,
143 YADIFContext *yadif = ctx->priv;
146 for (i = 0; i < yadif->csp->nb_components; i++) {
147 int w = dstpic->video->w;
148 int h = dstpic->video->h;
149 int refs = yadif->cur->linesize[i];
150 int df = (yadif->csp->comp[i].depth_minus1 + 8) / 8;
152 if (i == 1 || i == 2) {
153 /* Why is this not part of the per-plane description thing? */
154 w >>= yadif->csp->log2_chroma_w;
155 h >>= yadif->csp->log2_chroma_h;
158 for (y = 0; y < h; y++) {
159 if ((y ^ parity) & 1) {
160 uint8_t *prev = &yadif->prev->data[i][y*refs];
161 uint8_t *cur = &yadif->cur ->data[i][y*refs];
162 uint8_t *next = &yadif->next->data[i][y*refs];
163 uint8_t *dst = &dstpic->data[i][y*dstpic->linesize[i]];
164 int mode = y==1 || y+2==h ? 2 : yadif->mode;
165 yadif->filter_line(dst, prev, cur, next, w, y+1<h ? refs : -refs, y ? -refs : refs, parity ^ tff, mode);
167 memcpy(&dstpic->data[i][y*dstpic->linesize[i]],
168 &yadif->cur->data[i][y*refs], w*df);
173 __asm__ volatile("emms \n\t" : : : "memory");
177 static AVFilterBufferRef *get_video_buffer(AVFilterLink *link, int perms, int w, int h)
179 AVFilterBufferRef *picref;
180 int width = FFALIGN(w, 32);
181 int height= FFALIGN(h+2, 32);
184 picref = ff_default_get_video_buffer(link, perms, width, height);
186 picref->video->w = w;
187 picref->video->h = h;
189 for (i = 0; i < 3; i++)
190 picref->data[i] += picref->linesize[i];
195 static void return_frame(AVFilterContext *ctx, int is_second)
197 YADIFContext *yadif = ctx->priv;
198 AVFilterLink *link= ctx->outputs[0];
201 if (yadif->parity == -1) {
202 tff = yadif->cur->video->interlaced ?
203 yadif->cur->video->top_field_first : 1;
205 tff = yadif->parity^1;
209 yadif->out = avfilter_get_video_buffer(link, AV_PERM_WRITE | AV_PERM_PRESERVE |
210 AV_PERM_REUSE, link->w, link->h);
211 avfilter_copy_buffer_ref_props(yadif->out, yadif->cur);
212 yadif->out->video->interlaced = 0;
216 yadif->csp = &av_pix_fmt_descriptors[link->format];
217 if (yadif->csp->comp[0].depth_minus1 / 8 == 1)
218 yadif->filter_line = filter_line_c_16bit;
220 filter(ctx, yadif->out, tff ^ !is_second, tff);
223 int64_t cur_pts = yadif->cur->pts;
224 int64_t next_pts = yadif->next->pts;
226 if (next_pts != AV_NOPTS_VALUE && cur_pts != AV_NOPTS_VALUE) {
227 yadif->out->pts = cur_pts + next_pts;
229 yadif->out->pts = AV_NOPTS_VALUE;
231 avfilter_start_frame(ctx->outputs[0], yadif->out);
233 avfilter_draw_slice(ctx->outputs[0], 0, link->h, 1);
234 avfilter_end_frame(ctx->outputs[0]);
236 yadif->frame_pending = (yadif->mode&1) && !is_second;
239 static void start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
241 AVFilterContext *ctx = link->dst;
242 YADIFContext *yadif = ctx->priv;
244 if (yadif->frame_pending)
245 return_frame(ctx, 1);
248 avfilter_unref_buffer(yadif->prev);
249 yadif->prev = yadif->cur;
250 yadif->cur = yadif->next;
251 yadif->next = picref;
256 if (yadif->auto_enable && !yadif->cur->video->interlaced) {
257 yadif->out = avfilter_ref_buffer(yadif->cur, AV_PERM_READ);
258 avfilter_unref_buffer(yadif->prev);
260 if (yadif->out->pts != AV_NOPTS_VALUE)
261 yadif->out->pts *= 2;
262 avfilter_start_frame(ctx->outputs[0], yadif->out);
267 yadif->prev = avfilter_ref_buffer(yadif->cur, AV_PERM_READ);
269 yadif->out = avfilter_get_video_buffer(ctx->outputs[0], AV_PERM_WRITE | AV_PERM_PRESERVE |
270 AV_PERM_REUSE, link->w, link->h);
272 avfilter_copy_buffer_ref_props(yadif->out, yadif->cur);
273 yadif->out->video->interlaced = 0;
274 if (yadif->out->pts != AV_NOPTS_VALUE)
275 yadif->out->pts *= 2;
276 avfilter_start_frame(ctx->outputs[0], yadif->out);
279 static void end_frame(AVFilterLink *link)
281 AVFilterContext *ctx = link->dst;
282 YADIFContext *yadif = ctx->priv;
287 if (yadif->auto_enable && !yadif->cur->video->interlaced) {
288 avfilter_draw_slice(ctx->outputs[0], 0, link->h, 1);
289 avfilter_end_frame(ctx->outputs[0]);
293 return_frame(ctx, 0);
296 static int request_frame(AVFilterLink *link)
298 AVFilterContext *ctx = link->src;
299 YADIFContext *yadif = ctx->priv;
301 if (yadif->frame_pending) {
302 return_frame(ctx, 1);
312 ret = avfilter_request_frame(link->src->inputs[0]);
314 if (ret == AVERROR_EOF && yadif->next) {
315 AVFilterBufferRef *next = avfilter_ref_buffer(yadif->next, AV_PERM_READ);
316 next->pts = yadif->next->pts * 2 - yadif->cur->pts;
318 start_frame(link->src->inputs[0], next);
319 end_frame(link->src->inputs[0]);
321 } else if (ret < 0) {
324 } while (!yadif->cur);
329 static int poll_frame(AVFilterLink *link)
331 YADIFContext *yadif = link->src->priv;
334 if (yadif->frame_pending)
337 val = avfilter_poll_frame(link->src->inputs[0]);
341 if (val==1 && !yadif->next) { //FIXME change API to not requre this red tape
342 if ((ret = avfilter_request_frame(link->src->inputs[0])) < 0)
344 val = avfilter_poll_frame(link->src->inputs[0]);
348 assert(yadif->next || !val);
350 if (yadif->auto_enable && yadif->next && !yadif->next->video->interlaced)
353 return val * ((yadif->mode&1)+1);
356 static av_cold void uninit(AVFilterContext *ctx)
358 YADIFContext *yadif = ctx->priv;
360 if (yadif->prev) avfilter_unref_buffer(yadif->prev);
361 if (yadif->cur ) avfilter_unref_buffer(yadif->cur );
362 if (yadif->next) avfilter_unref_buffer(yadif->next);
365 static int query_formats(AVFilterContext *ctx)
367 static const enum PixelFormat pix_fmts[] = {
377 AV_NE( PIX_FMT_GRAY16BE, PIX_FMT_GRAY16LE ),
380 AV_NE( PIX_FMT_YUV420P10BE, PIX_FMT_YUV420P10LE ),
381 AV_NE( PIX_FMT_YUV422P10BE, PIX_FMT_YUV422P10LE ),
382 AV_NE( PIX_FMT_YUV444P10BE, PIX_FMT_YUV444P10LE ),
383 AV_NE( PIX_FMT_YUV420P16BE, PIX_FMT_YUV420P16LE ),
384 AV_NE( PIX_FMT_YUV422P16BE, PIX_FMT_YUV422P16LE ),
385 AV_NE( PIX_FMT_YUV444P16BE, PIX_FMT_YUV444P16LE ),
390 avfilter_set_common_formats(ctx, avfilter_make_format_list(pix_fmts));
395 static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
397 YADIFContext *yadif = ctx->priv;
398 int cpu_flags = av_get_cpu_flags();
402 yadif->auto_enable = 0;
405 if (args) sscanf(args, "%d:%d:%d", &yadif->mode, &yadif->parity, &yadif->auto_enable);
407 yadif->filter_line = filter_line_c;
408 if (HAVE_SSSE3 && cpu_flags & AV_CPU_FLAG_SSSE3)
409 yadif->filter_line = ff_yadif_filter_line_ssse3;
410 else if (HAVE_SSE && cpu_flags & AV_CPU_FLAG_SSE2)
411 yadif->filter_line = ff_yadif_filter_line_sse2;
412 else if (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX)
413 yadif->filter_line = ff_yadif_filter_line_mmx;
415 av_log(ctx, AV_LOG_INFO, "mode:%d parity:%d auto_enable:%d\n", yadif->mode, yadif->parity, yadif->auto_enable);
420 static void null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir) { }
422 static int config_props(AVFilterLink *link)
424 link->time_base.num = link->src->inputs[0]->time_base.num;
425 link->time_base.den = link->src->inputs[0]->time_base.den * 2;
426 link->w = link->src->inputs[0]->w;
427 link->h = link->src->inputs[0]->h;
432 AVFilter avfilter_vf_yadif = {
434 .description = NULL_IF_CONFIG_SMALL("Deinterlace the input image"),
436 .priv_size = sizeof(YADIFContext),
439 .query_formats = query_formats,
441 .inputs = (AVFilterPad[]) {{ .name = "default",
442 .type = AVMEDIA_TYPE_VIDEO,
443 .start_frame = start_frame,
444 .get_video_buffer = get_video_buffer,
445 .draw_slice = null_draw_slice,
446 .end_frame = end_frame, },
449 .outputs = (AVFilterPad[]) {{ .name = "default",
450 .type = AVMEDIA_TYPE_VIDEO,
451 .poll_frame = poll_frame,
452 .request_frame = request_frame,
453 .config_props = config_props, },