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"
33 * 0: send 1 frame for each frame
34 * 1: send 1 frame for each field
35 * 2: like 0 but skips spatial interlacing check
36 * 3: like 1 but skips spatial interlacing check
41 * 0: bottom field first
49 AVFilterBufferRef *cur;
50 AVFilterBufferRef *next;
51 AVFilterBufferRef *prev;
52 AVFilterBufferRef *out;
53 void (*filter_line)(uint8_t *dst,
54 uint8_t *prev, uint8_t *cur, uint8_t *next,
55 int w, int prefs, int mrefs, int parity, int mode);
57 const AVPixFmtDescriptor *csp;
61 { int score = FFABS(cur[mrefs-1+(j)] - cur[prefs-1-(j)])\
62 + FFABS(cur[mrefs +(j)] - cur[prefs -(j)])\
63 + FFABS(cur[mrefs+1+(j)] - cur[prefs+1-(j)]);\
64 if (score < spatial_score) {\
65 spatial_score= score;\
66 spatial_pred= (cur[mrefs +(j)] + cur[prefs -(j)])>>1;\
69 for (x = 0; x < w; x++) { \
71 int d = (prev2[0] + next2[0])>>1; \
73 int temporal_diff0 = FFABS(prev2[0] - next2[0]); \
74 int temporal_diff1 =(FFABS(prev[mrefs] - c) + FFABS(prev[prefs] - e) )>>1; \
75 int temporal_diff2 =(FFABS(next[mrefs] - c) + FFABS(next[prefs] - e) )>>1; \
76 int diff = FFMAX3(temporal_diff0>>1, temporal_diff1, temporal_diff2); \
77 int spatial_pred = (c+e)>>1; \
78 int spatial_score = FFABS(cur[mrefs-1] - cur[prefs-1]) + FFABS(c-e) \
79 + FFABS(cur[mrefs+1] - cur[prefs+1]) - 1; \
81 CHECK(-1) CHECK(-2) }} }} \
82 CHECK( 1) CHECK( 2) }} }} \
85 int b = (prev2[2*mrefs] + next2[2*mrefs])>>1; \
86 int f = (prev2[2*prefs] + next2[2*prefs])>>1; \
87 int max = FFMAX3(d-e, d-c, FFMIN(b-c, f-e)); \
88 int min = FFMIN3(d-e, d-c, FFMAX(b-c, f-e)); \
90 diff = FFMAX3(diff, min, -max); \
93 if (spatial_pred > d + diff) \
94 spatial_pred = d + diff; \
95 else if (spatial_pred < d - diff) \
96 spatial_pred = d - diff; \
98 dst[0] = spatial_pred; \
108 static void filter_line_c(uint8_t *dst,
109 uint8_t *prev, uint8_t *cur, uint8_t *next,
110 int w, int prefs, int mrefs, int parity, int mode)
113 uint8_t *prev2 = parity ? prev : cur ;
114 uint8_t *next2 = parity ? cur : next;
119 static void filter_line_c_16bit(uint16_t *dst,
120 uint16_t *prev, uint16_t *cur, uint16_t *next,
121 int w, int prefs, int mrefs, int parity, int mode)
124 uint16_t *prev2 = parity ? prev : cur ;
125 uint16_t *next2 = parity ? cur : next;
132 static void filter(AVFilterContext *ctx, AVFilterBufferRef *dstpic,
135 YADIFContext *yadif = ctx->priv;
138 for (i = 0; i < yadif->csp->nb_components; i++) {
139 int w = dstpic->video->w;
140 int h = dstpic->video->h;
141 int refs = yadif->cur->linesize[i];
142 int df = (yadif->csp->comp[i].depth_minus1+1) / 8;
145 /* Why is this not part of the per-plane description thing? */
146 w >>= yadif->csp->log2_chroma_w;
147 h >>= yadif->csp->log2_chroma_h;
150 for (y = 0; y < h; y++) {
151 if ((y ^ parity) & 1) {
152 uint8_t *prev = &yadif->prev->data[i][y*refs];
153 uint8_t *cur = &yadif->cur ->data[i][y*refs];
154 uint8_t *next = &yadif->next->data[i][y*refs];
155 uint8_t *dst = &dstpic->data[i][y*dstpic->linesize[i]];
156 int mode = y==1 || y+2==h ? 2 : yadif->mode;
157 yadif->filter_line(dst, prev, cur, next, w, y+1<h ? refs : -refs, y ? -refs : refs, parity ^ tff, mode);
159 memcpy(&dstpic->data[i][y*dstpic->linesize[i]],
160 &yadif->cur->data[i][y*refs], w*df);
165 __asm__ volatile("emms \n\t" : : : "memory");
169 static AVFilterBufferRef *get_video_buffer(AVFilterLink *link, int perms, int w, int h)
171 AVFilterBufferRef *picref;
172 int width = FFALIGN(w, 32);
173 int height= FFALIGN(h+2, 32);
176 picref = avfilter_default_get_video_buffer(link, perms, width, height);
178 picref->video->w = w;
179 picref->video->h = h;
181 for (i = 0; i < 3; i++)
182 picref->data[i] += picref->linesize[i];
187 static void return_frame(AVFilterContext *ctx, int is_second)
189 YADIFContext *yadif = ctx->priv;
190 AVFilterLink *link= ctx->outputs[0];
193 if (yadif->parity == -1) {
194 tff = yadif->cur->video->interlaced ?
195 yadif->cur->video->top_field_first : 1;
197 tff = yadif->parity^1;
201 yadif->out = avfilter_get_video_buffer(link, AV_PERM_WRITE | AV_PERM_PRESERVE |
202 AV_PERM_REUSE, link->w, link->h);
205 yadif->csp = &av_pix_fmt_descriptors[link->format];
206 if (yadif->csp->comp[0].depth_minus1 == 15)
207 yadif->filter_line = filter_line_c_16bit;
209 filter(ctx, yadif->out, tff ^ !is_second, tff);
212 if (yadif->next->pts != AV_NOPTS_VALUE &&
213 yadif->cur->pts != AV_NOPTS_VALUE) {
215 (yadif->next->pts&yadif->cur->pts) +
216 ((yadif->next->pts^yadif->cur->pts)>>1);
218 yadif->out->pts = AV_NOPTS_VALUE;
220 avfilter_start_frame(ctx->outputs[0], yadif->out);
222 avfilter_draw_slice(ctx->outputs[0], 0, link->h, 1);
223 avfilter_end_frame(ctx->outputs[0]);
225 yadif->frame_pending = (yadif->mode&1) && !is_second;
228 static void start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
230 AVFilterContext *ctx = link->dst;
231 YADIFContext *yadif = ctx->priv;
233 if (yadif->frame_pending)
234 return_frame(ctx, 1);
237 avfilter_unref_buffer(yadif->prev);
238 yadif->prev = yadif->cur;
239 yadif->cur = yadif->next;
240 yadif->next = picref;
246 yadif->prev = avfilter_ref_buffer(yadif->cur, AV_PERM_READ);
248 yadif->out = avfilter_get_video_buffer(ctx->outputs[0], AV_PERM_WRITE | AV_PERM_PRESERVE |
249 AV_PERM_REUSE, link->w, link->h);
251 avfilter_copy_buffer_ref_props(yadif->out, yadif->cur);
252 yadif->out->video->interlaced = 0;
253 avfilter_start_frame(ctx->outputs[0], yadif->out);
256 static void end_frame(AVFilterLink *link)
258 AVFilterContext *ctx = link->dst;
259 YADIFContext *yadif = ctx->priv;
264 return_frame(ctx, 0);
267 static int request_frame(AVFilterLink *link)
269 AVFilterContext *ctx = link->src;
270 YADIFContext *yadif = ctx->priv;
272 if (yadif->frame_pending) {
273 return_frame(ctx, 1);
280 if ((ret = avfilter_request_frame(link->src->inputs[0])))
282 } while (!yadif->cur);
287 static int poll_frame(AVFilterLink *link)
289 YADIFContext *yadif = link->src->priv;
292 if (yadif->frame_pending)
295 val = avfilter_poll_frame(link->src->inputs[0]);
297 if (val==1 && !yadif->next) { //FIXME change API to not requre this red tape
298 if ((ret = avfilter_request_frame(link->src->inputs[0])) < 0)
300 val = avfilter_poll_frame(link->src->inputs[0]);
302 assert(yadif->next || !val);
304 return val * ((yadif->mode&1)+1);
307 static av_cold void uninit(AVFilterContext *ctx)
309 YADIFContext *yadif = ctx->priv;
311 if (yadif->prev) avfilter_unref_buffer(yadif->prev);
312 if (yadif->cur ) avfilter_unref_buffer(yadif->cur );
313 if (yadif->next) avfilter_unref_buffer(yadif->next);
316 static int query_formats(AVFilterContext *ctx)
318 static const enum PixelFormat pix_fmts[] = {
328 AV_NE( PIX_FMT_GRAY16BE, PIX_FMT_GRAY16LE ),
331 AV_NE( PIX_FMT_YUV420P16BE, PIX_FMT_YUV420P16LE ),
332 AV_NE( PIX_FMT_YUV422P16BE, PIX_FMT_YUV422P16LE ),
333 AV_NE( PIX_FMT_YUV444P16BE, PIX_FMT_YUV444P16LE ),
337 avfilter_set_common_formats(ctx, avfilter_make_format_list(pix_fmts));
342 static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
344 YADIFContext *yadif = ctx->priv;
345 av_unused int cpu_flags = av_get_cpu_flags();
351 if (args) sscanf(args, "%d:%d", &yadif->mode, &yadif->parity);
353 yadif->filter_line = filter_line_c;
354 if (HAVE_SSSE3 && cpu_flags & AV_CPU_FLAG_SSSE3)
355 yadif->filter_line = ff_yadif_filter_line_ssse3;
356 else if (HAVE_SSE && cpu_flags & AV_CPU_FLAG_SSE2)
357 yadif->filter_line = ff_yadif_filter_line_sse2;
358 else if (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX)
359 yadif->filter_line = ff_yadif_filter_line_mmx;
361 av_log(ctx, AV_LOG_INFO, "mode:%d parity:%d\n", yadif->mode, yadif->parity);
366 static void null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir) { }
368 AVFilter avfilter_vf_yadif = {
370 .description = NULL_IF_CONFIG_SMALL("Deinterlace the input image"),
372 .priv_size = sizeof(YADIFContext),
375 .query_formats = query_formats,
377 .inputs = (AVFilterPad[]) {{ .name = "default",
378 .type = AVMEDIA_TYPE_VIDEO,
379 .start_frame = start_frame,
380 .get_video_buffer = get_video_buffer,
381 .draw_slice = null_draw_slice,
382 .end_frame = end_frame, },
385 .outputs = (AVFilterPad[]) {{ .name = "default",
386 .type = AVMEDIA_TYPE_VIDEO,
387 .poll_frame = poll_frame,
388 .request_frame = request_frame, },