libavfilter/yadif_common.c

   1 /*
   2  * Copyright (C) 2006-2011 Michael Niedermayer <michaelni@gmx.at>
   3  *               2010      James Darnley <james.darnley@gmail.com>
   4
   5  * This file is part of FFmpeg.
   6  *
   7  * FFmpeg is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * FFmpeg 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 GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with FFmpeg; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 #include "libavutil/avassert.h"
  23 #include "libavutil/imgutils.h"
  24 #include "filters.h"
  25 #include "video.h"
  26 #include "yadif.h"
  27
  28 static int return_frame(AVFilterContext *ctx, int is_second)
  29 {
  30     YADIFContext *yadif = ctx->priv;
  31     AVFilterLink *link  = ctx->outputs[0];
  32     int tff, ret;
  33
  34     if (yadif->parity == -1) {
  35         tff = (yadif->cur->flags & AV_FRAME_FLAG_INTERLACED) ?
  36               !!(yadif->cur->flags & AV_FRAME_FLAG_TOP_FIELD_FIRST) : 1;
  37     } else {
  38         tff = yadif->parity ^ 1;
  39     }
  40
  41     if (is_second) {
  42         yadif->out = ff_get_video_buffer(link, link->w, link->h);
  43         if (!yadif->out)
  44             return AVERROR(ENOMEM);
  45
  46         av_frame_copy_props(yadif->out, yadif->cur);
  47 #if FF_API_INTERLACED_FRAME
  48 FF_DISABLE_DEPRECATION_WARNINGS
  49         yadif->out->interlaced_frame = 0;
  50 FF_ENABLE_DEPRECATION_WARNINGS
  51 #endif
  52         yadif->out->flags &= ~AV_FRAME_FLAG_INTERLACED;
  53         if (yadif->current_field == YADIF_FIELD_BACK_END)
  54             yadif->current_field = YADIF_FIELD_END;
  55     }
  56
  57     yadif->filter(ctx, yadif->out, tff ^ !is_second, tff);
  58
  59     if (is_second) {
  60         int64_t cur_pts  = yadif->cur->pts;
  61         int64_t next_pts = yadif->next->pts;
  62
  63         if (next_pts != AV_NOPTS_VALUE && cur_pts != AV_NOPTS_VALUE) {
  64             yadif->out->pts = cur_pts + next_pts;
  65             if (yadif->pts_multiplier == 1) {
  66                 yadif->out->pts >>= 1;
  67                 yadif->out->duration >>= 1;
  68             }
  69         } else {
  70             yadif->out->pts = AV_NOPTS_VALUE;
  71         }
  72     }
  73
  74     ff_ccfifo_inject(&yadif->cc_fifo, yadif->out);
  75     ret = ff_filter_frame(ctx->outputs[0], yadif->out);
  76
  77     yadif->frame_pending = (yadif->mode&1) && !is_second;
  78     return ret;
  79 }
  80
  81 static int checkstride(YADIFContext *yadif, const AVFrame *a, const AVFrame *b)
  82 {
  83     int i;
  84     for (i = 0; i < yadif->csp->nb_components; i++)
  85         if (a->linesize[i] != b->linesize[i])
  86             return 1;
  87     return 0;
  88 }
  89
  90 static void fixstride(AVFilterLink *link, AVFrame *f)
  91 {
  92     AVFrame *dst = ff_default_get_video_buffer(link, f->width, f->height);
  93     if(!dst)
  94         return;
  95     av_frame_copy_props(dst, f);
  96     av_image_copy2(dst->data, dst->linesize,
  97                    f->data, f->linesize,
  98                    dst->format, dst->width, dst->height);
  99     av_frame_unref(f);
 100     av_frame_move_ref(f, dst);
 101     av_frame_free(&dst);
 102 }
 103
 104 int ff_yadif_filter_frame(AVFilterLink *link, AVFrame *frame)
 105 {
 106     AVFilterContext *ctx = link->dst;
 107     YADIFContext *yadif = ctx->priv;
 108
 109     av_assert0(frame);
 110
 111     ff_ccfifo_extract(&yadif->cc_fifo, frame);
 112
 113     if (yadif->frame_pending)
 114         return_frame(ctx, 1);
 115
 116     if (yadif->prev)
 117         av_frame_free(&yadif->prev);
 118     yadif->prev = yadif->cur;
 119     yadif->cur  = yadif->next;
 120     yadif->next = frame;
 121
 122     if (!yadif->cur) {
 123         yadif->cur = av_frame_clone(yadif->next);
 124         if (!yadif->cur)
 125             return AVERROR(ENOMEM);
 126         yadif->current_field = YADIF_FIELD_END;
 127     }
 128
 129     if (checkstride(yadif, yadif->next, yadif->cur)) {
 130         av_log(ctx, AV_LOG_VERBOSE, "Reallocating frame due to differing stride\n");
 131         fixstride(link, yadif->next);
 132     }
 133     if (checkstride(yadif, yadif->next, yadif->cur))
 134         fixstride(link, yadif->cur);
 135     if (yadif->prev && checkstride(yadif, yadif->next, yadif->prev))
 136         fixstride(link, yadif->prev);
 137     if (checkstride(yadif, yadif->next, yadif->cur) || (yadif->prev && checkstride(yadif, yadif->next, yadif->prev))) {
 138         av_log(ctx, AV_LOG_ERROR, "Failed to reallocate frame\n");
 139         return -1;
 140     }
 141
 142     if (!yadif->prev)
 143         return 0;
 144
 145     if ((yadif->deint && !(yadif->cur->flags & AV_FRAME_FLAG_INTERLACED)) ||
 146         ctx->is_disabled ||
 147         (yadif->deint && !(yadif->prev->flags & AV_FRAME_FLAG_INTERLACED) && yadif->prev->repeat_pict) ||
 148         (yadif->deint && !(yadif->next->flags & AV_FRAME_FLAG_INTERLACED) && yadif->next->repeat_pict)
 149     ) {
 150         yadif->out  = av_frame_clone(yadif->cur);
 151         if (!yadif->out)
 152             return AVERROR(ENOMEM);
 153
 154         ff_ccfifo_inject(&yadif->cc_fifo, yadif->out);
 155         av_frame_free(&yadif->prev);
 156         if (yadif->out->pts != AV_NOPTS_VALUE)
 157             yadif->out->pts *= yadif->pts_multiplier;
 158         yadif->out->duration *= yadif->pts_multiplier;
 159         return ff_filter_frame(ctx->outputs[0], yadif->out);
 160     }
 161
 162     yadif->out = ff_get_video_buffer(ctx->outputs[0], link->w, link->h);
 163     if (!yadif->out)
 164         return AVERROR(ENOMEM);
 165
 166     av_frame_copy_props(yadif->out, yadif->cur);
 167 #if FF_API_INTERLACED_FRAME
 168 FF_DISABLE_DEPRECATION_WARNINGS
 169     yadif->out->interlaced_frame = 0;
 170 FF_ENABLE_DEPRECATION_WARNINGS
 171 #endif
 172     yadif->out->flags &= ~AV_FRAME_FLAG_INTERLACED;
 173
 174     if (yadif->out->pts != AV_NOPTS_VALUE)
 175         yadif->out->pts *= yadif->pts_multiplier;
 176     if (!(yadif->mode & 1))
 177         yadif->out->duration *= yadif->pts_multiplier;
 178     else if (yadif->pts_multiplier == 1)
 179         yadif->out->duration >>= 1;
 180
 181     return return_frame(ctx, 0);
 182 }
 183
 184 int ff_yadif_request_frame(AVFilterLink *link)
 185 {
 186     AVFilterContext *ctx = link->src;
 187     YADIFContext *yadif = ctx->priv;
 188     int ret;
 189
 190     if (yadif->frame_pending) {
 191         return_frame(ctx, 1);
 192         return 0;
 193     }
 194
 195     if (yadif->eof)
 196         return AVERROR_EOF;
 197
 198     ret  = ff_request_frame(ctx->inputs[0]);
 199
 200     if (ret == AVERROR_EOF && yadif->cur) {
 201         AVFrame *next = av_frame_clone(yadif->next);
 202
 203         if (!next)
 204             return AVERROR(ENOMEM);
 205
 206         yadif->current_field = YADIF_FIELD_BACK_END;
 207         next->pts = yadif->next->pts * 2 - yadif->cur->pts;
 208
 209         ff_yadif_filter_frame(ctx->inputs[0], next);
 210         yadif->eof = 1;
 211     } else if (ret < 0) {
 212         return ret;
 213     }
 214
 215     return 0;
 216 }
 217
 218 int ff_yadif_config_output_common(AVFilterLink *outlink)
 219 {
 220     AVFilterContext *ctx = outlink->src;
 221     FilterLink *il = ff_filter_link(ctx->inputs[0]);
 222     FilterLink *ol = ff_filter_link(outlink);
 223     YADIFContext *yadif = ctx->priv;
 224     AVRational tb = ctx->inputs[0]->time_base;
 225     int ret;
 226
 227     if (av_reduce(&outlink->time_base.num, &outlink->time_base.den, tb.num, tb.den * 2LL, INT_MAX)) {
 228         yadif->pts_multiplier = 2;
 229     } else {
 230         av_log(ctx, AV_LOG_WARNING, "Cannot use exact output timebase\n");
 231         outlink->time_base = tb;
 232         yadif->pts_multiplier = 1;
 233     }
 234
 235     outlink->w             = ctx->inputs[0]->w;
 236     outlink->h             = ctx->inputs[0]->h;
 237
 238     if (outlink->w < 3 || outlink->h < 3) {
 239         av_log(ctx, AV_LOG_ERROR, "Video of less than 3 columns or lines is not supported\n");
 240         return AVERROR(EINVAL);
 241     }
 242
 243     if(yadif->mode & 1)
 244         ol->frame_rate = av_mul_q(il->frame_rate,
 245                                     (AVRational){2, 1});
 246     else
 247         ol->frame_rate = il->frame_rate;
 248
 249     ret = ff_ccfifo_init(&yadif->cc_fifo, ol->frame_rate, ctx);
 250     if (ret < 0) {
 251         av_log(ctx, AV_LOG_ERROR, "Failure to setup CC FIFO queue\n");
 252         return ret;
 253     }
 254
 255     return 0;
 256 }
 257
 258 void ff_yadif_uninit(AVFilterContext *ctx)
 259 {
 260     YADIFContext *yadif = ctx->priv;
 261
 262     av_frame_free(&yadif->prev);
 263     av_frame_free(&yadif->cur );
 264     av_frame_free(&yadif->next);
 265     ff_ccfifo_uninit(&yadif->cc_fifo);
 266 }
 267
 268 #define OFFSET(x) offsetof(YADIFContext, x)
 269 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
 270
 271 #define CONST(name, help, val, u) { name, help, 0, AV_OPT_TYPE_CONST, {.i64=val}, INT_MIN, INT_MAX, FLAGS, .unit = u }
 272
 273 const AVOption ff_yadif_options[] = {
 274     { "mode",   "specify the interlacing mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=YADIF_MODE_SEND_FRAME}, 0, 3, FLAGS, .unit = "mode"},
 275     CONST("send_frame",           "send one frame for each frame",                                     YADIF_MODE_SEND_FRAME,           "mode"),
 276     CONST("send_field",           "send one frame for each field",                                     YADIF_MODE_SEND_FIELD,           "mode"),
 277     CONST("send_frame_nospatial", "send one frame for each frame, but skip spatial interlacing check", YADIF_MODE_SEND_FRAME_NOSPATIAL, "mode"),
 278     CONST("send_field_nospatial", "send one frame for each field, but skip spatial interlacing check", YADIF_MODE_SEND_FIELD_NOSPATIAL, "mode"),
 279
 280     { "parity", "specify the assumed picture field parity", OFFSET(parity), AV_OPT_TYPE_INT, {.i64=YADIF_PARITY_AUTO}, -1, 1, FLAGS, .unit = "parity" },
 281     CONST("tff",  "assume top field first",    YADIF_PARITY_TFF,  "parity"),
 282     CONST("bff",  "assume bottom field first", YADIF_PARITY_BFF,  "parity"),
 283     CONST("auto", "auto detect parity",        YADIF_PARITY_AUTO, "parity"),
 284
 285     { "deint", "specify which frames to deinterlace", OFFSET(deint), AV_OPT_TYPE_INT, {.i64=YADIF_DEINT_ALL}, 0, 1, FLAGS, .unit = "deint" },
 286     CONST("all",        "deinterlace all frames",                       YADIF_DEINT_ALL,         "deint"),
 287     CONST("interlaced", "only deinterlace frames marked as interlaced", YADIF_DEINT_INTERLACED,  "deint"),
 288
 289     { NULL }
 290 };