2 * Copyright (C) 2006-2010 Michael Niedermayer <michaelni@gmx.at>
4 * This file is part of Libav.
6 * Libav is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * Libav is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License along
17 * with Libav; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
21 #include "libavutil/cpu.h"
22 #include "libavutil/common.h"
23 #include "libavutil/pixdesc.h"
32 * 0: send 1 frame for each frame
33 * 1: send 1 frame for each field
34 * 2: like 0 but skips spatial interlacing check
35 * 3: like 1 but skips spatial interlacing check
40 * 0: bottom field first
48 AVFilterBufferRef *cur;
49 AVFilterBufferRef *next;
50 AVFilterBufferRef *prev;
51 AVFilterBufferRef *out;
52 void (*filter_line)(uint8_t *dst,
53 uint8_t *prev, uint8_t *cur, uint8_t *next,
54 int w, int prefs, int mrefs, int parity, int mode);
56 const AVPixFmtDescriptor *csp;
59 static void filter_line_c(uint8_t *dst,
60 uint8_t *prev, uint8_t *cur, uint8_t *next,
61 int w, int prefs, int mrefs, int parity, int mode)
64 uint8_t *prev2 = parity ? prev : cur ;
65 uint8_t *next2 = parity ? cur : next;
66 for (x = 0; x < w; x++) {
68 int d = (prev2[0] + next2[0])>>1;
70 int temporal_diff0 = FFABS(prev2[0] - next2[0]);
71 int temporal_diff1 =(FFABS(prev[mrefs] - c) + FFABS(prev[prefs] - e) )>>1;
72 int temporal_diff2 =(FFABS(next[mrefs] - c) + FFABS(next[prefs] - e) )>>1;
73 int diff = FFMAX3(temporal_diff0>>1, temporal_diff1, temporal_diff2);
74 int spatial_pred = (c+e)>>1;
75 int spatial_score = FFABS(cur[mrefs-1] - cur[prefs-1]) + FFABS(c-e)
76 + FFABS(cur[mrefs+1] - cur[prefs+1]) - 1;
79 { int score = FFABS(cur[mrefs-1+(j)] - cur[prefs-1-(j)])\
80 + FFABS(cur[mrefs +(j)] - cur[prefs -(j)])\
81 + FFABS(cur[mrefs+1+(j)] - cur[prefs+1-(j)]);\
82 if (score < spatial_score) {\
83 spatial_score= score;\
84 spatial_pred= (cur[mrefs +(j)] + cur[prefs -(j)])>>1;\
86 CHECK(-1) CHECK(-2) }} }}
87 CHECK( 1) CHECK( 2) }} }}
90 int b = (prev2[2*mrefs] + next2[2*mrefs])>>1;
91 int f = (prev2[2*prefs] + next2[2*prefs])>>1;
95 int max = FFMAX3(d-e, d-c, FFMIN3(FFMAX(b-c,f-e),FFMAX(b-c,b-a),FFMAX(f-g,f-e)) );
96 int min = FFMIN3(d-e, d-c, FFMAX3(FFMIN(b-c,f-e),FFMIN(b-c,b-a),FFMIN(f-g,f-e)) );
98 int max = FFMAX3(d-e, d-c, FFMIN(b-c, f-e));
99 int min = FFMIN3(d-e, d-c, FFMAX(b-c, f-e));
102 diff = FFMAX3(diff, min, -max);
105 if (spatial_pred > d + diff)
106 spatial_pred = d + diff;
107 else if (spatial_pred < d - diff)
108 spatial_pred = d - diff;
110 dst[0] = spatial_pred;
121 static void filter(AVFilterContext *ctx, AVFilterBufferRef *dstpic,
124 YADIFContext *yadif = ctx->priv;
127 for (i = 0; i < yadif->csp->nb_components; i++) {
128 int w = dstpic->video->w;
129 int h = dstpic->video->h;
130 int refs = yadif->cur->linesize[i];
133 /* Why is this not part of the per-plane description thing? */
134 w >>= yadif->csp->log2_chroma_w;
135 h >>= yadif->csp->log2_chroma_h;
138 for (y = 0; y < h; y++) {
139 if ((y ^ parity) & 1) {
140 uint8_t *prev = &yadif->prev->data[i][y*refs];
141 uint8_t *cur = &yadif->cur ->data[i][y*refs];
142 uint8_t *next = &yadif->next->data[i][y*refs];
143 uint8_t *dst = &dstpic->data[i][y*dstpic->linesize[i]];
144 int mode = y==1 || y+2==h ? 2 : yadif->mode;
145 yadif->filter_line(dst, prev, cur, next, w, y+1<h ? refs : -refs, y ? -refs : refs, parity ^ tff, mode);
147 memcpy(&dstpic->data[i][y*dstpic->linesize[i]],
148 &yadif->cur->data[i][y*refs], w);
153 __asm__ volatile("emms \n\t" : : : "memory");
157 static AVFilterBufferRef *get_video_buffer(AVFilterLink *link, int perms, int w, int h)
159 AVFilterBufferRef *picref;
160 int width = FFALIGN(w, 32);
161 int height= FFALIGN(h+2, 32);
164 picref = avfilter_default_get_video_buffer(link, perms, width, height);
166 picref->video->w = w;
167 picref->video->h = h;
169 for (i = 0; i < 3; i++)
170 picref->data[i] += picref->linesize[i];
175 static void return_frame(AVFilterContext *ctx, int is_second)
177 YADIFContext *yadif = ctx->priv;
178 AVFilterLink *link= ctx->outputs[0];
181 if (yadif->parity == -1) {
182 tff = yadif->cur->video->interlaced ?
183 yadif->cur->video->top_field_first : 1;
185 tff = yadif->parity^1;
189 yadif->out = avfilter_get_video_buffer(link, AV_PERM_WRITE | AV_PERM_PRESERVE |
190 AV_PERM_REUSE, link->w, link->h);
193 yadif->csp = &av_pix_fmt_descriptors[link->format];
195 filter(ctx, yadif->out, tff ^ !is_second, tff);
198 if (yadif->next->pts != AV_NOPTS_VALUE &&
199 yadif->cur->pts != AV_NOPTS_VALUE) {
201 (yadif->next->pts&yadif->cur->pts) +
202 ((yadif->next->pts^yadif->cur->pts)>>1);
204 yadif->out->pts = AV_NOPTS_VALUE;
206 avfilter_start_frame(ctx->outputs[0], yadif->out);
208 avfilter_draw_slice(ctx->outputs[0], 0, link->h, 1);
209 avfilter_end_frame(ctx->outputs[0]);
211 yadif->frame_pending = (yadif->mode&1) && !is_second;
214 static void start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
216 AVFilterContext *ctx = link->dst;
217 YADIFContext *yadif = ctx->priv;
219 if (yadif->frame_pending)
220 return_frame(ctx, 1);
223 avfilter_unref_buffer(yadif->prev);
224 yadif->prev = yadif->cur;
225 yadif->cur = yadif->next;
226 yadif->next = picref;
232 yadif->prev = avfilter_ref_buffer(yadif->cur, AV_PERM_READ);
234 yadif->out = avfilter_get_video_buffer(ctx->outputs[0], AV_PERM_WRITE | AV_PERM_PRESERVE |
235 AV_PERM_REUSE, link->w, link->h);
237 avfilter_copy_buffer_ref_props(yadif->out, yadif->cur);
238 yadif->out->video->interlaced = 0;
239 avfilter_start_frame(ctx->outputs[0], yadif->out);
242 static void end_frame(AVFilterLink *link)
244 AVFilterContext *ctx = link->dst;
245 YADIFContext *yadif = ctx->priv;
250 return_frame(ctx, 0);
253 static int request_frame(AVFilterLink *link)
255 AVFilterContext *ctx = link->src;
256 YADIFContext *yadif = ctx->priv;
258 if (yadif->frame_pending) {
259 return_frame(ctx, 1);
266 if ((ret = avfilter_request_frame(link->src->inputs[0])))
268 } while (!yadif->cur);
273 static int poll_frame(AVFilterLink *link)
275 YADIFContext *yadif = link->src->priv;
278 if (yadif->frame_pending)
281 val = avfilter_poll_frame(link->src->inputs[0]);
283 if (val==1 && !yadif->next) { //FIXME change API to not requre this red tape
284 if ((ret = avfilter_request_frame(link->src->inputs[0])) < 0)
286 val = avfilter_poll_frame(link->src->inputs[0]);
288 assert(yadif->next || !val);
290 return val * ((yadif->mode&1)+1);
293 static av_cold void uninit(AVFilterContext *ctx)
295 YADIFContext *yadif = ctx->priv;
297 if (yadif->prev) avfilter_unref_buffer(yadif->prev);
298 if (yadif->cur ) avfilter_unref_buffer(yadif->cur );
299 if (yadif->next) avfilter_unref_buffer(yadif->next);
302 static int query_formats(AVFilterContext *ctx)
304 static const enum PixelFormat pix_fmts[] = {
319 avfilter_set_common_formats(ctx, avfilter_make_format_list(pix_fmts));
324 static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
326 YADIFContext *yadif = ctx->priv;
327 av_unused int cpu_flags = av_get_cpu_flags();
333 if (args) sscanf(args, "%d:%d", &yadif->mode, &yadif->parity);
335 yadif->filter_line = filter_line_c;
336 if (HAVE_SSSE3 && cpu_flags & AV_CPU_FLAG_SSSE3)
337 yadif->filter_line = ff_yadif_filter_line_ssse3;
338 else if (HAVE_SSE && cpu_flags & AV_CPU_FLAG_SSE2)
339 yadif->filter_line = ff_yadif_filter_line_sse2;
340 else if (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX)
341 yadif->filter_line = ff_yadif_filter_line_mmx;
343 av_log(ctx, AV_LOG_INFO, "mode:%d parity:%d\n", yadif->mode, yadif->parity);
348 static void null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir) { }
350 AVFilter avfilter_vf_yadif = {
352 .description = NULL_IF_CONFIG_SMALL("Deinterlace the input image"),
354 .priv_size = sizeof(YADIFContext),
357 .query_formats = query_formats,
359 .inputs = (AVFilterPad[]) {{ .name = "default",
360 .type = AVMEDIA_TYPE_VIDEO,
361 .start_frame = start_frame,
362 .get_video_buffer = get_video_buffer,
363 .draw_slice = null_draw_slice,
364 .end_frame = end_frame, },
367 .outputs = (AVFilterPad[]) {{ .name = "default",
368 .type = AVMEDIA_TYPE_VIDEO,
369 .poll_frame = poll_frame,
370 .request_frame = request_frame, },