LCOV - code coverage report
Current view: top level - libavfilter - vf_setfield.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 7 8 87.5 %
Date: 2017-12-18 06:23:41 Functions: 1 1 100.0 %

          Line data    Source code
       1             : /*
       2             :  * Copyright (c) 2012 Stefano Sabatini
       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             : /**
      22             :  * @file
      23             :  * set field order
      24             :  */
      25             : 
      26             : #include "libavutil/opt.h"
      27             : #include "avfilter.h"
      28             : #include "internal.h"
      29             : #include "video.h"
      30             : 
      31             : enum SetFieldMode {
      32             :     MODE_AUTO = -1,
      33             :     MODE_BFF,
      34             :     MODE_TFF,
      35             :     MODE_PROG,
      36             : };
      37             : 
      38             : typedef struct SetFieldContext {
      39             :     const AVClass *class;
      40             :     int mode;                   ///< SetFieldMode
      41             : } SetFieldContext;
      42             : 
      43             : #define OFFSET(x) offsetof(SetFieldContext, x)
      44             : #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
      45             : 
      46             : static const AVOption setfield_options[] = {
      47             :     {"mode", "select interlace mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=MODE_AUTO}, -1, MODE_PROG, FLAGS, "mode"},
      48             :     {"auto", "keep the same input field",  0, AV_OPT_TYPE_CONST, {.i64=MODE_AUTO}, INT_MIN, INT_MAX, FLAGS, "mode"},
      49             :     {"bff",  "mark as bottom-field-first", 0, AV_OPT_TYPE_CONST, {.i64=MODE_BFF},  INT_MIN, INT_MAX, FLAGS, "mode"},
      50             :     {"tff",  "mark as top-field-first",    0, AV_OPT_TYPE_CONST, {.i64=MODE_TFF},  INT_MIN, INT_MAX, FLAGS, "mode"},
      51             :     {"prog", "mark as progressive",        0, AV_OPT_TYPE_CONST, {.i64=MODE_PROG}, INT_MIN, INT_MAX, FLAGS, "mode"},
      52             :     {NULL}
      53             : };
      54             : 
      55             : AVFILTER_DEFINE_CLASS(setfield);
      56             : 
      57         108 : static int filter_frame(AVFilterLink *inlink, AVFrame *picref)
      58             : {
      59         108 :     SetFieldContext *setfield = inlink->dst->priv;
      60             : 
      61         108 :     if (setfield->mode == MODE_PROG) {
      62           0 :         picref->interlaced_frame = 0;
      63         108 :     } else if (setfield->mode != MODE_AUTO) {
      64         108 :         picref->interlaced_frame = 1;
      65         108 :         picref->top_field_first = setfield->mode;
      66             :     }
      67         108 :     return ff_filter_frame(inlink->dst->outputs[0], picref);
      68             : }
      69             : 
      70             : static const AVFilterPad setfield_inputs[] = {
      71             :     {
      72             :         .name         = "default",
      73             :         .type         = AVMEDIA_TYPE_VIDEO,
      74             :         .filter_frame = filter_frame,
      75             :     },
      76             :     { NULL }
      77             : };
      78             : 
      79             : static const AVFilterPad setfield_outputs[] = {
      80             :     {
      81             :         .name = "default",
      82             :         .type = AVMEDIA_TYPE_VIDEO,
      83             :     },
      84             :     { NULL }
      85             : };
      86             : 
      87             : AVFilter ff_vf_setfield = {
      88             :     .name        = "setfield",
      89             :     .description = NULL_IF_CONFIG_SMALL("Force field for the output video frame."),
      90             :     .priv_size   = sizeof(SetFieldContext),
      91             :     .priv_class  = &setfield_class,
      92             :     .inputs      = setfield_inputs,
      93             :     .outputs     = setfield_outputs,
      94             : };

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