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"
36 * 0: send 1 frame for each frame
37 * 1: send 1 frame for each field
38 * 2: like 0 but skips spatial interlacing check
39 * 3: like 1 but skips spatial interlacing check
45 * 1: bottom field first
53 * 0: deinterlace all frames
54 * 1: only deinterlace frames marked as interlaced
58 AVFilterBufferRef *cur;
59 AVFilterBufferRef *next;
60 AVFilterBufferRef *prev;
61 AVFilterBufferRef *out;
62 void (*filter_line)(uint8_t *dst,
63 uint8_t *prev, uint8_t *cur, uint8_t *next,
64 int w, int prefs, int mrefs, int parity, int mode);
66 const AVPixFmtDescriptor *csp;
71 { int score = FFABS(cur[mrefs-1+(j)] - cur[prefs-1-(j)])\
72 + FFABS(cur[mrefs +(j)] - cur[prefs -(j)])\
73 + FFABS(cur[mrefs+1+(j)] - cur[prefs+1-(j)]);\
74 if (score < spatial_score) {\
75 spatial_score= score;\
76 spatial_pred= (cur[mrefs +(j)] + cur[prefs -(j)])>>1;\
79 for (x = 0; x < w; x++) { \
81 int d = (prev2[0] + next2[0])>>1; \
83 int temporal_diff0 = FFABS(prev2[0] - next2[0]); \
84 int temporal_diff1 =(FFABS(prev[mrefs] - c) + FFABS(prev[prefs] - e) )>>1; \
85 int temporal_diff2 =(FFABS(next[mrefs] - c) + FFABS(next[prefs] - e) )>>1; \
86 int diff = FFMAX3(temporal_diff0>>1, temporal_diff1, temporal_diff2); \
87 int spatial_pred = (c+e)>>1; \
88 int spatial_score = FFABS(cur[mrefs-1] - cur[prefs-1]) + FFABS(c-e) \
89 + FFABS(cur[mrefs+1] - cur[prefs+1]) - 1; \
91 CHECK(-1) CHECK(-2) }} }} \
92 CHECK( 1) CHECK( 2) }} }} \
95 int b = (prev2[2*mrefs] + next2[2*mrefs])>>1; \
96 int f = (prev2[2*prefs] + next2[2*prefs])>>1; \
97 int max = FFMAX3(d-e, d-c, FFMIN(b-c, f-e)); \
98 int min = FFMIN3(d-e, d-c, FFMAX(b-c, f-e)); \
100 diff = FFMAX3(diff, min, -max); \
103 if (spatial_pred > d + diff) \
104 spatial_pred = d + diff; \
105 else if (spatial_pred < d - diff) \
106 spatial_pred = d - diff; \
108 dst[0] = spatial_pred; \
118 static void filter_line_c(uint8_t *dst,
119 uint8_t *prev, uint8_t *cur, uint8_t *next,
120 int w, int prefs, int mrefs, int parity, int mode)
123 uint8_t *prev2 = parity ? prev : cur ;
124 uint8_t *next2 = parity ? cur : next;
129 static void filter_line_c_16bit(uint16_t *dst,
130 uint16_t *prev, uint16_t *cur, uint16_t *next,
131 int w, int prefs, int mrefs, int parity, int mode)
134 uint16_t *prev2 = parity ? prev : cur ;
135 uint16_t *next2 = parity ? cur : next;
142 static void filter(AVFilterContext *ctx, AVFilterBufferRef *dstpic,
145 YADIFContext *yadif = ctx->priv;
148 for (i = 0; i < yadif->csp->nb_components; i++) {
149 int w = dstpic->video->w;
150 int h = dstpic->video->h;
151 int refs = yadif->cur->linesize[i];
152 int df = (yadif->csp->comp[i].depth_minus1 + 8) / 8;
154 if (i == 1 || i == 2) {
155 /* Why is this not part of the per-plane description thing? */
156 w >>= yadif->csp->log2_chroma_w;
157 h >>= yadif->csp->log2_chroma_h;
160 for (y = 0; y < h; y++) {
161 if ((y ^ parity) & 1) {
162 uint8_t *prev = &yadif->prev->data[i][y*refs];
163 uint8_t *cur = &yadif->cur ->data[i][y*refs];
164 uint8_t *next = &yadif->next->data[i][y*refs];
165 uint8_t *dst = &dstpic->data[i][y*dstpic->linesize[i]];
166 int mode = y==1 || y+2==h ? 2 : yadif->mode;
167 yadif->filter_line(dst, prev, cur, next, w, y+1<h ? refs : -refs, y ? -refs : refs, parity ^ tff, mode);
169 memcpy(&dstpic->data[i][y*dstpic->linesize[i]],
170 &yadif->cur->data[i][y*refs], w*df);
175 __asm__ volatile("emms \n\t" : : : "memory");
179 static AVFilterBufferRef *get_video_buffer(AVFilterLink *link, int perms, int w, int h)
181 AVFilterBufferRef *picref;
182 int width = FFALIGN(w, 32);
183 int height= FFALIGN(h+2, 32);
186 picref = ff_default_get_video_buffer(link, perms, width, height);
188 picref->video->w = w;
189 picref->video->h = h;
191 for (i = 0; i < 3; i++)
192 picref->data[i] += picref->linesize[i];
197 static void return_frame(AVFilterContext *ctx, int is_second)
199 YADIFContext *yadif = ctx->priv;
200 AVFilterLink *link= ctx->outputs[0];
203 if (yadif->parity == -1) {
204 tff = yadif->cur->video->interlaced ?
205 yadif->cur->video->top_field_first : 1;
207 tff = yadif->parity^1;
211 yadif->out = avfilter_get_video_buffer(link, AV_PERM_WRITE | AV_PERM_PRESERVE |
212 AV_PERM_REUSE, link->w, link->h);
213 avfilter_copy_buffer_ref_props(yadif->out, yadif->cur);
214 yadif->out->video->interlaced = 0;
218 yadif->csp = &av_pix_fmt_descriptors[link->format];
219 if (yadif->csp->comp[0].depth_minus1 / 8 == 1)
220 yadif->filter_line = filter_line_c_16bit;
222 filter(ctx, yadif->out, tff ^ !is_second, tff);
225 int64_t cur_pts = yadif->cur->pts;
226 int64_t next_pts = yadif->next->pts;
228 if (next_pts != AV_NOPTS_VALUE && cur_pts != AV_NOPTS_VALUE) {
229 yadif->out->pts = cur_pts + next_pts;
231 yadif->out->pts = AV_NOPTS_VALUE;
233 ff_start_frame(ctx->outputs[0], yadif->out);
235 ff_draw_slice(ctx->outputs[0], 0, link->h, 1);
236 ff_end_frame(ctx->outputs[0]);
238 yadif->frame_pending = (yadif->mode&1) && !is_second;
241 static void start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
243 AVFilterContext *ctx = link->dst;
244 YADIFContext *yadif = ctx->priv;
246 if (yadif->frame_pending)
247 return_frame(ctx, 1);
250 avfilter_unref_buffer(yadif->prev);
251 yadif->prev = yadif->cur;
252 yadif->cur = yadif->next;
253 yadif->next = picref;
258 if (yadif->auto_enable && !yadif->cur->video->interlaced) {
259 yadif->out = avfilter_ref_buffer(yadif->cur, AV_PERM_READ);
260 avfilter_unref_buffer(yadif->prev);
262 if (yadif->out->pts != AV_NOPTS_VALUE)
263 yadif->out->pts *= 2;
264 ff_start_frame(ctx->outputs[0], yadif->out);
269 yadif->prev = avfilter_ref_buffer(yadif->cur, AV_PERM_READ);
271 yadif->out = avfilter_get_video_buffer(ctx->outputs[0], AV_PERM_WRITE | AV_PERM_PRESERVE |
272 AV_PERM_REUSE, link->w, link->h);
274 avfilter_copy_buffer_ref_props(yadif->out, yadif->cur);
275 yadif->out->video->interlaced = 0;
276 if (yadif->out->pts != AV_NOPTS_VALUE)
277 yadif->out->pts *= 2;
278 ff_start_frame(ctx->outputs[0], yadif->out);
281 static void end_frame(AVFilterLink *link)
283 AVFilterContext *ctx = link->dst;
284 YADIFContext *yadif = ctx->priv;
289 if (yadif->auto_enable && !yadif->cur->video->interlaced) {
290 ff_draw_slice(ctx->outputs[0], 0, link->h, 1);
291 ff_end_frame(ctx->outputs[0]);
295 return_frame(ctx, 0);
298 static int request_frame(AVFilterLink *link)
300 AVFilterContext *ctx = link->src;
301 YADIFContext *yadif = ctx->priv;
303 if (yadif->frame_pending) {
304 return_frame(ctx, 1);
314 ret = ff_request_frame(link->src->inputs[0]);
316 if (ret == AVERROR_EOF && yadif->next) {
317 AVFilterBufferRef *next = avfilter_ref_buffer(yadif->next, AV_PERM_READ);
318 next->pts = yadif->next->pts * 2 - yadif->cur->pts;
320 start_frame(link->src->inputs[0], next);
321 end_frame(link->src->inputs[0]);
323 } else if (ret < 0) {
326 } while (!yadif->cur);
331 static int poll_frame(AVFilterLink *link)
333 YADIFContext *yadif = link->src->priv;
336 if (yadif->frame_pending)
339 val = ff_poll_frame(link->src->inputs[0]);
343 if (val==1 && !yadif->next) { //FIXME change API to not requre this red tape
344 if ((ret = ff_request_frame(link->src->inputs[0])) < 0)
346 val = ff_poll_frame(link->src->inputs[0]);
350 assert(yadif->next || !val);
352 if (yadif->auto_enable && yadif->next && !yadif->next->video->interlaced)
355 return val * ((yadif->mode&1)+1);
358 static av_cold void uninit(AVFilterContext *ctx)
360 YADIFContext *yadif = ctx->priv;
362 if (yadif->prev) avfilter_unref_buffer(yadif->prev);
363 if (yadif->cur ) avfilter_unref_buffer(yadif->cur );
364 if (yadif->next) avfilter_unref_buffer(yadif->next);
367 static int query_formats(AVFilterContext *ctx)
369 static const enum PixelFormat pix_fmts[] = {
379 AV_NE( PIX_FMT_GRAY16BE, PIX_FMT_GRAY16LE ),
382 AV_NE( PIX_FMT_YUV420P10BE, PIX_FMT_YUV420P10LE ),
383 AV_NE( PIX_FMT_YUV422P10BE, PIX_FMT_YUV422P10LE ),
384 AV_NE( PIX_FMT_YUV444P10BE, PIX_FMT_YUV444P10LE ),
385 AV_NE( PIX_FMT_YUV420P16BE, PIX_FMT_YUV420P16LE ),
386 AV_NE( PIX_FMT_YUV422P16BE, PIX_FMT_YUV422P16LE ),
387 AV_NE( PIX_FMT_YUV444P16BE, PIX_FMT_YUV444P16LE ),
392 ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
397 static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
399 YADIFContext *yadif = ctx->priv;
400 int cpu_flags = av_get_cpu_flags();
404 yadif->auto_enable = 0;
407 if (args) sscanf(args, "%d:%d:%d", &yadif->mode, &yadif->parity, &yadif->auto_enable);
409 yadif->filter_line = filter_line_c;
410 if (HAVE_SSSE3 && cpu_flags & AV_CPU_FLAG_SSSE3)
411 yadif->filter_line = ff_yadif_filter_line_ssse3;
412 else if (HAVE_SSE && cpu_flags & AV_CPU_FLAG_SSE2)
413 yadif->filter_line = ff_yadif_filter_line_sse2;
414 else if (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX)
415 yadif->filter_line = ff_yadif_filter_line_mmx;
417 av_log(ctx, AV_LOG_INFO, "mode:%d parity:%d auto_enable:%d\n", yadif->mode, yadif->parity, yadif->auto_enable);
422 static void null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir) { }
424 static int config_props(AVFilterLink *link)
426 link->time_base.num = link->src->inputs[0]->time_base.num;
427 link->time_base.den = link->src->inputs[0]->time_base.den * 2;
428 link->w = link->src->inputs[0]->w;
429 link->h = link->src->inputs[0]->h;
434 AVFilter avfilter_vf_yadif = {
436 .description = NULL_IF_CONFIG_SMALL("Deinterlace the input image"),
438 .priv_size = sizeof(YADIFContext),
441 .query_formats = query_formats,
443 .inputs = (AVFilterPad[]) {{ .name = "default",
444 .type = AVMEDIA_TYPE_VIDEO,
445 .start_frame = start_frame,
446 .get_video_buffer = get_video_buffer,
447 .draw_slice = null_draw_slice,
448 .end_frame = end_frame, },
451 .outputs = (AVFilterPad[]) {{ .name = "default",
452 .type = AVMEDIA_TYPE_VIDEO,
453 .poll_frame = poll_frame,
454 .request_frame = request_frame,
455 .config_props = config_props, },