LCOV - code coverage report
Current view: top level - libavfilter - vf_shuffleframes.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 49 57 86.0 %
Date: 2017-12-14 01:15:32 Functions: 3 3 100.0 %

          Line data    Source code
       1             : /*
       2             :  * Copyright (c) 2015 Paul B Mahol
       3             :  *
       4             :  * This file is part of FFmpeg.
       5             :  *
       6             :  * FFmpeg is free software; you can redistribute it and/or
       7             :  * modify it under the terms of the GNU Lesser General Public
       8             :  * License as published by the Free Software Foundation; either
       9             :  * version 2.1 of the License, or (at your option) any later version.
      10             :  *
      11             :  * FFmpeg 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 GNU
      14             :  * Lesser General Public License for more details.
      15             :  *
      16             :  * You should have received a copy of the GNU Lesser General Public
      17             :  * License along with FFmpeg; if not, write to the Free Software
      18             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      19             :  */
      20             : 
      21             : #include "libavutil/avassert.h"
      22             : #include "libavutil/avstring.h"
      23             : #include "libavutil/common.h"
      24             : #include "libavutil/internal.h"
      25             : #include "libavutil/opt.h"
      26             : 
      27             : #include "avfilter.h"
      28             : #include "internal.h"
      29             : #include "video.h"
      30             : 
      31             : typedef struct ShuffleFramesContext {
      32             :     const AVClass *class;
      33             :     char *mapping;
      34             :     AVFrame **frames;
      35             :     int *map;
      36             :     int64_t *pts;
      37             :     int in_frames;
      38             :     int nb_frames;
      39             : } ShuffleFramesContext;
      40             : 
      41           1 : static av_cold int init(AVFilterContext *ctx)
      42             : {
      43           1 :     ShuffleFramesContext *s = ctx->priv;
      44           1 :     char *mapping, *saveptr = NULL, *p;
      45             :     int n, nb_items;
      46             : 
      47           1 :     nb_items = 1;
      48           6 :     for (p = s->mapping; *p; p++) {
      49           5 :         if (*p == '|' || *p == ' ')
      50           2 :             nb_items++;
      51             :     }
      52             : 
      53           1 :     s->frames = av_calloc(nb_items, sizeof(*s->frames));
      54           1 :     s->map    = av_calloc(nb_items, sizeof(*s->map));
      55           1 :     s->pts    = av_calloc(nb_items, sizeof(*s->pts));
      56           1 :     if (!s->map || !s->frames || !s->pts) {
      57           0 :         return AVERROR(ENOMEM);
      58             :     }
      59             : 
      60           1 :     mapping = av_strdup(s->mapping);
      61           1 :     if (!mapping)
      62           0 :         return AVERROR(ENOMEM);
      63             : 
      64           4 :     for (n = 0; n < nb_items; n++) {
      65           3 :         char *map = av_strtok(n == 0 ? mapping : NULL, " |", &saveptr);
      66           3 :         if (!map || sscanf(map, "%d", &s->map[n]) != 1) {
      67           0 :             av_free(mapping);
      68           0 :             return AVERROR(EINVAL);
      69             :         }
      70             : 
      71           3 :         if (s->map[n] < -1 || s->map[n] >= nb_items) {
      72           0 :             av_log(ctx, AV_LOG_ERROR, "Index out of range.\n");
      73           0 :             av_free(mapping);
      74           0 :             return AVERROR(EINVAL);
      75             :         }
      76             :     }
      77             : 
      78           1 :     s->nb_frames = nb_items;
      79           1 :     av_free(mapping);
      80           1 :     return 0;
      81             : }
      82             : 
      83          50 : static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
      84             : {
      85          50 :     AVFilterContext    *ctx = inlink->dst;
      86          50 :     ShuffleFramesContext *s = ctx->priv;
      87          50 :     int ret = 0;
      88             : 
      89          50 :     if (s->in_frames < s->nb_frames) {
      90          50 :         s->frames[s->in_frames] = frame;
      91          50 :         s->pts[s->in_frames] = frame->pts;
      92          50 :         s->in_frames++;
      93             :     }
      94             : 
      95          50 :     if (s->in_frames == s->nb_frames) {
      96             :         int n, x;
      97             : 
      98          64 :         for (n = 0; n < s->nb_frames; n++) {
      99             :             AVFrame *out;
     100             : 
     101          48 :             x = s->map[n];
     102          48 :             if (x >= 0) {
     103          48 :                 out = av_frame_clone(s->frames[x]);
     104          48 :                 if (!out)
     105           0 :                     return AVERROR(ENOMEM);
     106          48 :                 out->pts = s->pts[n];
     107          48 :                 ret = ff_filter_frame(ctx->outputs[0], out);
     108             :             }
     109          48 :             s->in_frames--;
     110             :         }
     111             : 
     112          64 :         for (n = 0; n < s->nb_frames; n++)
     113          48 :             av_frame_free(&s->frames[n]);
     114             :     }
     115             : 
     116          50 :     return ret;
     117             : }
     118             : 
     119           1 : static av_cold void uninit(AVFilterContext *ctx)
     120             : {
     121           1 :     ShuffleFramesContext *s = ctx->priv;
     122             : 
     123           4 :     while (s->in_frames > 0) {
     124           2 :         s->in_frames--;
     125           2 :         av_frame_free(&s->frames[s->in_frames]);
     126             :     }
     127             : 
     128           1 :     av_freep(&s->frames);
     129           1 :     av_freep(&s->map);
     130           1 :     av_freep(&s->pts);
     131           1 : }
     132             : 
     133             : #define OFFSET(x) offsetof(ShuffleFramesContext, x)
     134             : #define FLAGS (AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_VIDEO_PARAM)
     135             : static const AVOption shuffleframes_options[] = {
     136             :     { "mapping", "set destination indexes of input frames",  OFFSET(mapping), AV_OPT_TYPE_STRING, {.str="0"}, 0, 0, FLAGS },
     137             :     { NULL },
     138             : };
     139             : 
     140             : AVFILTER_DEFINE_CLASS(shuffleframes);
     141             : 
     142             : static const AVFilterPad shuffleframes_inputs[] = {
     143             :     {
     144             :         .name         = "default",
     145             :         .type         = AVMEDIA_TYPE_VIDEO,
     146             :         .filter_frame = filter_frame,
     147             :     },
     148             :     { NULL },
     149             : };
     150             : 
     151             : static const AVFilterPad shuffleframes_outputs[] = {
     152             :     {
     153             :         .name = "default",
     154             :         .type = AVMEDIA_TYPE_VIDEO,
     155             :     },
     156             :     { NULL },
     157             : };
     158             : 
     159             : AVFilter ff_vf_shuffleframes = {
     160             :     .name          = "shuffleframes",
     161             :     .description   = NULL_IF_CONFIG_SMALL("Shuffle video frames."),
     162             :     .priv_size     = sizeof(ShuffleFramesContext),
     163             :     .priv_class    = &shuffleframes_class,
     164             :     .init          = init,
     165             :     .uninit        = uninit,
     166             :     .inputs        = shuffleframes_inputs,
     167             :     .outputs       = shuffleframes_outputs,
     168             :     .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
     169             : };

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