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 PERM_RWP AV_PERM_WRITE | AV_PERM_PRESERVE | AV_PERM_REUSE
  35
  36 #define CHECK(j)\
  37     {   int score = FFABS(cur[mrefs-1+(j)] - cur[prefs-1-(j)])\
  38                   + FFABS(cur[mrefs  +(j)] - cur[prefs  -(j)])\
  39                   + FFABS(cur[mrefs+1+(j)] - cur[prefs+1-(j)]);\
  40         if (score < spatial_score) {\
  41             spatial_score= score;\
  42             spatial_pred= (cur[mrefs  +(j)] + cur[prefs  -(j)])>>1;\
  43
  44 #define FILTER \
  45     for (x = 0;  x < w; x++) { \
  46         int c = cur[mrefs]; \
  47         int d = (prev2[0] + next2[0])>>1; \
  48         int e = cur[prefs]; \
  49         int temporal_diff0 = FFABS(prev2[0] - next2[0]); \
  50         int temporal_diff1 =(FFABS(prev[mrefs] - c) + FFABS(prev[prefs] - e) )>>1; \
  51         int temporal_diff2 =(FFABS(next[mrefs] - c) + FFABS(next[prefs] - e) )>>1; \
  52         int diff = FFMAX3(temporal_diff0 >> 1, temporal_diff1, temporal_diff2); \
  53         int spatial_pred = (c+e) >> 1; \
  54         int spatial_score = FFABS(cur[mrefs - 1] - cur[prefs - 1]) + FFABS(c-e) \
  55                           + FFABS(cur[mrefs + 1] - cur[prefs + 1]) - 1; \
  56  \
  57         CHECK(-1) CHECK(-2) }} }} \
  58         CHECK( 1) CHECK( 2) }} }} \
  59  \
  60         if (mode < 2) { \
  61             int b = (prev2[2 * mrefs] + next2[2 * mrefs])>>1; \
  62             int f = (prev2[2 * prefs] + next2[2 * prefs])>>1; \
  63             int max = FFMAX3(d - e, d - c, FFMIN(b - c, f - e)); \
  64             int min = FFMIN3(d - e, d - c, FFMAX(b - c, f - e)); \
  65  \
  66             diff = FFMAX3(diff, min, -max); \
  67         } \
  68  \
  69         if (spatial_pred > d + diff) \
  70            spatial_pred = d + diff; \
  71         else if (spatial_pred < d - diff) \
  72            spatial_pred = d - diff; \
  73  \
  74         dst[0] = spatial_pred; \
  75  \
  76         dst++; \
  77         cur++; \
  78         prev++; \
  79         next++; \
  80         prev2++; \
  81         next2++; \
  82     }
  83
  84 static void filter_line_c(uint8_t *dst,
  85                           uint8_t *prev, uint8_t *cur, uint8_t *next,
  86                           int w, int prefs, int mrefs, int parity, int mode)
  87 {
  88     int x;
  89     uint8_t *prev2 = parity ? prev : cur ;
  90     uint8_t *next2 = parity ? cur  : next;
  91
  92     FILTER
  93 }
  94
  95 static void filter_line_c_16bit(uint16_t *dst,
  96                                 uint16_t *prev, uint16_t *cur, uint16_t *next,
  97                                 int w, int prefs, int mrefs, int parity,
  98                                 int mode)
  99 {
 100     int x;
 101     uint16_t *prev2 = parity ? prev : cur ;
 102     uint16_t *next2 = parity ? cur  : next;
 103     mrefs /= 2;
 104     prefs /= 2;
 105
 106     FILTER
 107 }
 108
 109 static void filter(AVFilterContext *ctx, AVFilterBufferRef *dstpic,
 110                    int parity, int tff)
 111 {
 112     YADIFContext *yadif = ctx->priv;
 113     int y, i;
 114
 115     for (i = 0; i < yadif->csp->nb_components; i++) {
 116         int w = dstpic->video->w;
 117         int h = dstpic->video->h;
 118         int refs = yadif->cur->linesize[i];
 119         int df = (yadif->csp->comp[i].depth_minus1 + 8) / 8;
 120
 121         if (i == 1 || i == 2) {
 122         /* Why is this not part of the per-plane description thing? */
 123             w >>= yadif->csp->log2_chroma_w;
 124             h >>= yadif->csp->log2_chroma_h;
 125         }
 126
 127         for (y = 0; y < h; y++) {
 128             if ((y ^ parity) & 1) {
 129                 uint8_t *prev = &yadif->prev->data[i][y * refs];
 130                 uint8_t *cur  = &yadif->cur ->data[i][y * refs];
 131                 uint8_t *next = &yadif->next->data[i][y * refs];
 132                 uint8_t *dst  = &dstpic->data[i][y * dstpic->linesize[i]];
 133                 int     mode  = y == 1 || y + 2 == h ? 2 : yadif->mode;
 134                 yadif->filter_line(dst, prev, cur, next, w,
 135                                    y + 1 < h ? refs : -refs,
 136                                    y ? -refs : refs,
 137                                    parity ^ tff, mode);
 138             } else {
 139                 memcpy(&dstpic->data[i][y * dstpic->linesize[i]],
 140                        &yadif->cur->data[i][y * refs], w * df);
 141             }
 142         }
 143     }
 144
 145     emms_c();
 146 }
 147
 148 static AVFilterBufferRef *get_video_buffer(AVFilterLink *link, int perms,
 149                                            int w, int h)
 150 {
 151     AVFilterBufferRef *picref;
 152     int width  = FFALIGN(w, 32);
 153     int height = FFALIGN(h + 2, 32);
 154     int i;
 155
 156     picref = ff_default_get_video_buffer(link, perms, width, height);
 157
 158     picref->video->w = w;
 159     picref->video->h = h;
 160
 161     for (i = 0; i < 3; i++)
 162         picref->data[i] += picref->linesize[i];
 163
 164     return picref;
 165 }
 166
 167 static int return_frame(AVFilterContext *ctx, int is_second)
 168 {
 169     YADIFContext *yadif = ctx->priv;
 170     AVFilterLink *link  = ctx->outputs[0];
 171     int tff, ret;
 172
 173     if (yadif->parity == -1) {
 174         tff = yadif->cur->video->interlaced ?
 175               yadif->cur->video->top_field_first : 1;
 176     } else {
 177         tff = yadif->parity ^ 1;
 178     }
 179
 180     if (is_second) {
 181         yadif->out = ff_get_video_buffer(link, PERM_RWP, link->w, link->h);
 182         if (!yadif->out)
 183             return AVERROR(ENOMEM);
 184
 185         avfilter_copy_buffer_ref_props(yadif->out, yadif->cur);
 186         yadif->out->video->interlaced = 0;
 187     }
 188
 189     if (!yadif->csp)
 190         yadif->csp = av_pix_fmt_desc_get(link->format);
 191     if (yadif->csp->comp[0].depth_minus1 / 8 == 1)
 192         yadif->filter_line = filter_line_c_16bit;
 193
 194     filter(ctx, yadif->out, tff ^ !is_second, tff);
 195
 196     if (is_second) {
 197         int64_t cur_pts  = yadif->cur->pts;
 198         int64_t next_pts = yadif->next->pts;
 199
 200         if (next_pts != AV_NOPTS_VALUE && cur_pts != AV_NOPTS_VALUE) {
 201             yadif->out->pts = cur_pts + next_pts;
 202         } else {
 203             yadif->out->pts = AV_NOPTS_VALUE;
 204         }
 205     }
 206     ret = ff_filter_frame(ctx->outputs[0], yadif->out);
 207
 208     yadif->frame_pending = (yadif->mode&1) && !is_second;
 209     return ret;
 210 }
 211
 212 static int filter_frame(AVFilterLink *link, AVFilterBufferRef *picref)
 213 {
 214     AVFilterContext *ctx = link->dst;
 215     YADIFContext *yadif = ctx->priv;
 216
 217     if (yadif->frame_pending)
 218         return_frame(ctx, 1);
 219
 220     if (yadif->prev)
 221         avfilter_unref_buffer(yadif->prev);
 222     yadif->prev = yadif->cur;
 223     yadif->cur  = yadif->next;
 224     yadif->next = picref;
 225
 226     if (!yadif->cur)
 227         return 0;
 228
 229     if (yadif->auto_enable && !yadif->cur->video->interlaced) {
 230         yadif->out  = avfilter_ref_buffer(yadif->cur, AV_PERM_READ);
 231         if (!yadif->out)
 232             return AVERROR(ENOMEM);
 233
 234         avfilter_unref_bufferp(&yadif->prev);
 235         if (yadif->out->pts != AV_NOPTS_VALUE)
 236             yadif->out->pts *= 2;
 237         return ff_filter_frame(ctx->outputs[0], yadif->out);
 238     }
 239
 240     if (!yadif->prev &&
 241         !(yadif->prev = avfilter_ref_buffer(yadif->cur, AV_PERM_READ)))
 242         return AVERROR(ENOMEM);
 243
 244     yadif->out = ff_get_video_buffer(ctx->outputs[0], PERM_RWP,
 245                                      link->w, link->h);
 246     if (!yadif->out)
 247         return AVERROR(ENOMEM);
 248
 249     avfilter_copy_buffer_ref_props(yadif->out, yadif->cur);
 250     yadif->out->video->interlaced = 0;
 251
 252     if (yadif->out->pts != AV_NOPTS_VALUE)
 253         yadif->out->pts *= 2;
 254
 255     return return_frame(ctx, 0);
 256 }
 257
 258 static int request_frame(AVFilterLink *link)
 259 {
 260     AVFilterContext *ctx = link->src;
 261     YADIFContext *yadif = ctx->priv;
 262
 263     if (yadif->frame_pending) {
 264         return_frame(ctx, 1);
 265         return 0;
 266     }
 267
 268     do {
 269         int ret;
 270
 271         if (yadif->eof)
 272             return AVERROR_EOF;
 273
 274         ret  = ff_request_frame(link->src->inputs[0]);
 275
 276         if (ret == AVERROR_EOF && yadif->next) {
 277             AVFilterBufferRef *next =
 278                 avfilter_ref_buffer(yadif->next, AV_PERM_READ);
 279
 280             if (!next)
 281                 return AVERROR(ENOMEM);
 282
 283             next->pts = yadif->next->pts * 2 - yadif->cur->pts;
 284
 285             filter_frame(link->src->inputs[0], next);
 286             yadif->eof = 1;
 287         } else if (ret < 0) {
 288             return ret;
 289         }
 290     } while (!yadif->cur);
 291
 292     return 0;
 293 }
 294
 295 static int poll_frame(AVFilterLink *link)
 296 {
 297     YADIFContext *yadif = link->src->priv;
 298     int ret, val;
 299
 300     if (yadif->frame_pending)
 301         return 1;
 302
 303     val = ff_poll_frame(link->src->inputs[0]);
 304     if (val <= 0)
 305         return val;
 306
 307     //FIXME change API to not requre this red tape
 308     if (val == 1 && !yadif->next) {
 309         if ((ret = ff_request_frame(link->src->inputs[0])) < 0)
 310             return ret;
 311         val = ff_poll_frame(link->src->inputs[0]);
 312         if (val <= 0)
 313             return val;
 314     }
 315     assert(yadif->next || !val);
 316
 317     if (yadif->auto_enable && yadif->next && !yadif->next->video->interlaced)
 318         return val;
 319
 320     return val * ((yadif->mode&1)+1);
 321 }
 322
 323 static av_cold void uninit(AVFilterContext *ctx)
 324 {
 325     YADIFContext *yadif = ctx->priv;
 326
 327     if (yadif->prev) avfilter_unref_bufferp(&yadif->prev);
 328     if (yadif->cur ) avfilter_unref_bufferp(&yadif->cur );
 329     if (yadif->next) avfilter_unref_bufferp(&yadif->next);
 330 }
 331
 332 static int query_formats(AVFilterContext *ctx)
 333 {
 334     static const enum AVPixelFormat pix_fmts[] = {
 335         AV_PIX_FMT_YUV420P,
 336         AV_PIX_FMT_YUV422P,
 337         AV_PIX_FMT_YUV444P,
 338         AV_PIX_FMT_YUV410P,
 339         AV_PIX_FMT_YUV411P,
 340         AV_PIX_FMT_GRAY8,
 341         AV_PIX_FMT_YUVJ420P,
 342         AV_PIX_FMT_YUVJ422P,
 343         AV_PIX_FMT_YUVJ444P,
 344         AV_NE( AV_PIX_FMT_GRAY16BE, AV_PIX_FMT_GRAY16LE ),
 345         AV_PIX_FMT_YUV440P,
 346         AV_PIX_FMT_YUVJ440P,
 347         AV_NE( AV_PIX_FMT_YUV420P10BE, AV_PIX_FMT_YUV420P10LE ),
 348         AV_NE( AV_PIX_FMT_YUV422P10BE, AV_PIX_FMT_YUV422P10LE ),
 349         AV_NE( AV_PIX_FMT_YUV444P10BE, AV_PIX_FMT_YUV444P10LE ),
 350         AV_NE( AV_PIX_FMT_YUV420P16BE, AV_PIX_FMT_YUV420P16LE ),
 351         AV_NE( AV_PIX_FMT_YUV422P16BE, AV_PIX_FMT_YUV422P16LE ),
 352         AV_NE( AV_PIX_FMT_YUV444P16BE, AV_PIX_FMT_YUV444P16LE ),
 353         AV_PIX_FMT_YUVA420P,
 354         AV_PIX_FMT_NONE
 355     };
 356
 357     ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
 358
 359     return 0;
 360 }
 361
 362 static av_cold int init(AVFilterContext *ctx, const char *args)
 363 {
 364     YADIFContext *yadif = ctx->priv;
 365
 366     yadif->mode = 0;
 367     yadif->parity = -1;
 368     yadif->auto_enable = 0;
 369     yadif->csp = NULL;
 370
 371     if (args)
 372         sscanf(args, "%d:%d:%d",
 373                &yadif->mode, &yadif->parity, &yadif->auto_enable);
 374
 375     yadif->filter_line = filter_line_c;
 376
 377     if (ARCH_X86)
 378         ff_yadif_init_x86(yadif);
 379
 380     av_log(ctx, AV_LOG_VERBOSE, "mode:%d parity:%d auto_enable:%d\n",
 381            yadif->mode, yadif->parity, yadif->auto_enable);
 382
 383     return 0;
 384 }
 385
 386 static int config_props(AVFilterLink *link)
 387 {
 388     link->time_base.num = link->src->inputs[0]->time_base.num;
 389     link->time_base.den = link->src->inputs[0]->time_base.den * 2;
 390     link->w             = link->src->inputs[0]->w;
 391     link->h             = link->src->inputs[0]->h;
 392
 393     return 0;
 394 }
 395
 396 static const AVFilterPad avfilter_vf_yadif_inputs[] = {
 397     {
 398         .name             = "default",
 399         .type             = AVMEDIA_TYPE_VIDEO,
 400         .get_video_buffer = get_video_buffer,
 401         .filter_frame     = filter_frame,
 402     },
 403     { NULL }
 404 };
 405
 406 static const AVFilterPad avfilter_vf_yadif_outputs[] = {
 407     {
 408         .name          = "default",
 409         .type          = AVMEDIA_TYPE_VIDEO,
 410         .poll_frame    = poll_frame,
 411         .request_frame = request_frame,
 412         .config_props  = config_props,
 413     },
 414     { NULL }
 415 };
 416
 417 AVFilter avfilter_vf_yadif = {
 418     .name          = "yadif",
 419     .description   = NULL_IF_CONFIG_SMALL("Deinterlace the input image"),
 420
 421     .priv_size     = sizeof(YADIFContext),
 422     .init          = init,
 423     .uninit        = uninit,
 424     .query_formats = query_formats,
 425
 426     .inputs    = avfilter_vf_yadif_inputs,
 427
 428     .outputs   = avfilter_vf_yadif_outputs,
 429 };