mirror of
https://git.videolan.org/git/ffmpeg.git
synced 2024-08-27 20:01:50 +02:00
116 lines
3.4 KiB
C
116 lines
3.4 KiB
C
/*
|
|
* Copyright (c) 2012 Stefano Sabatini
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* set field order
|
|
*/
|
|
|
|
#include "libavutil/opt.h"
|
|
#include "avfilter.h"
|
|
#include "internal.h"
|
|
#include "video.h"
|
|
|
|
enum SetFieldMode {
|
|
MODE_AUTO = -1,
|
|
MODE_BFF,
|
|
MODE_TFF,
|
|
MODE_PROG,
|
|
};
|
|
|
|
typedef struct {
|
|
const AVClass *class;
|
|
enum SetFieldMode mode;
|
|
} SetFieldContext;
|
|
|
|
#define OFFSET(x) offsetof(SetFieldContext, x)
|
|
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
|
|
|
|
static const AVOption setfield_options[] = {
|
|
{"mode", "select interlace mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=MODE_AUTO}, -1, MODE_PROG, FLAGS, "mode"},
|
|
{"auto", "keep the same input field", 0, AV_OPT_TYPE_CONST, {.i64=MODE_AUTO}, INT_MIN, INT_MAX, FLAGS, "mode"},
|
|
{"bff", "mark as bottom-field-first", 0, AV_OPT_TYPE_CONST, {.i64=MODE_BFF}, INT_MIN, INT_MAX, FLAGS, "mode"},
|
|
{"tff", "mark as top-field-first", 0, AV_OPT_TYPE_CONST, {.i64=MODE_TFF}, INT_MIN, INT_MAX, FLAGS, "mode"},
|
|
{"prog", "mark as progressive", 0, AV_OPT_TYPE_CONST, {.i64=MODE_PROG}, INT_MIN, INT_MAX, FLAGS, "mode"},
|
|
{NULL}
|
|
};
|
|
|
|
AVFILTER_DEFINE_CLASS(setfield);
|
|
|
|
static av_cold int init(AVFilterContext *ctx, const char *args)
|
|
{
|
|
SetFieldContext *setfield = ctx->priv;
|
|
static const char *shorthand[] = { "mode", NULL };
|
|
|
|
setfield->class = &setfield_class;
|
|
av_opt_set_defaults(setfield);
|
|
|
|
return av_opt_set_from_string(setfield, args, shorthand, "=", ":");
|
|
}
|
|
|
|
static av_cold void uninit(AVFilterContext *ctx)
|
|
{
|
|
SetFieldContext *setfield = ctx->priv;
|
|
av_opt_free(setfield);
|
|
}
|
|
|
|
static int filter_frame(AVFilterLink *inlink, AVFilterBufferRef *picref)
|
|
{
|
|
SetFieldContext *setfield = inlink->dst->priv;
|
|
|
|
if (setfield->mode == MODE_PROG) {
|
|
picref->video->interlaced = 0;
|
|
} else if (setfield->mode != MODE_AUTO) {
|
|
picref->video->interlaced = 1;
|
|
picref->video->top_field_first = setfield->mode;
|
|
}
|
|
return ff_filter_frame(inlink->dst->outputs[0], picref);
|
|
}
|
|
|
|
static const AVFilterPad setfield_inputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.get_video_buffer = ff_null_get_video_buffer,
|
|
.filter_frame = filter_frame,
|
|
},
|
|
{ NULL }
|
|
};
|
|
|
|
static const AVFilterPad setfield_outputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
},
|
|
{ NULL }
|
|
};
|
|
|
|
AVFilter avfilter_vf_setfield = {
|
|
.name = "setfield",
|
|
.description = NULL_IF_CONFIG_SMALL("Force field for the output video frame."),
|
|
.init = init,
|
|
.uninit = uninit,
|
|
|
|
.priv_size = sizeof(SetFieldContext),
|
|
.inputs = setfield_inputs,
|
|
.outputs = setfield_outputs,
|
|
.priv_class = &setfield_class,
|
|
};
|