mirror of
https://github.com/xenia-project/FFmpeg.git
synced 2024-11-25 04:30:02 +00:00
112 lines
3.3 KiB
C
112 lines
3.3 KiB
C
/*
|
|
* Copyright (c) 2013 Paul B Mahol
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
#include "libavutil/pixdesc.h"
|
|
#include "avfilter.h"
|
|
#include "internal.h"
|
|
|
|
typedef struct {
|
|
int nb_planes;
|
|
double ts_unit;
|
|
} SeparateFieldsContext;
|
|
|
|
static int config_props_output(AVFilterLink *outlink)
|
|
{
|
|
AVFilterContext *ctx = outlink->src;
|
|
SeparateFieldsContext *sf = ctx->priv;
|
|
AVFilterLink *inlink = ctx->inputs[0];
|
|
|
|
sf->nb_planes = av_pix_fmt_count_planes(inlink->format);;
|
|
|
|
if (inlink->h & 1) {
|
|
av_log(ctx, AV_LOG_ERROR, "height must be even\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
outlink->time_base.num = inlink->time_base.num;
|
|
outlink->time_base.den = inlink->time_base.den * 2;
|
|
outlink->frame_rate.num = inlink->frame_rate.num * 2;
|
|
outlink->frame_rate.den = inlink->frame_rate.den;
|
|
outlink->w = inlink->w;
|
|
outlink->h = inlink->h / 2;
|
|
sf->ts_unit = av_q2d(av_inv_q(av_mul_q(outlink->frame_rate, outlink->time_base)));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int filter_frame(AVFilterLink *inlink, AVFrame *inpicref)
|
|
{
|
|
AVFilterContext *ctx = inlink->dst;
|
|
SeparateFieldsContext *sf = ctx->priv;
|
|
AVFilterLink *outlink = ctx->outputs[0];
|
|
AVFrame *second;
|
|
int i, ret;
|
|
|
|
inpicref->height = outlink->h;
|
|
inpicref->interlaced_frame = 0;
|
|
|
|
second = av_frame_clone(inpicref);
|
|
if (!second)
|
|
return AVERROR(ENOMEM);
|
|
|
|
for (i = 0; i < sf->nb_planes; i++) {
|
|
if (!inpicref->top_field_first)
|
|
inpicref->data[i] = inpicref->data[i] + inpicref->linesize[i];
|
|
else
|
|
second->data[i] = second->data[i] + second->linesize[i];
|
|
inpicref->linesize[i] *= 2;
|
|
second->linesize[i] *= 2;
|
|
}
|
|
|
|
inpicref->pts = outlink->frame_count * sf->ts_unit;
|
|
ret = ff_filter_frame(outlink, inpicref);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
second->pts = outlink->frame_count * sf->ts_unit;
|
|
return ff_filter_frame(outlink, second);
|
|
}
|
|
|
|
static const AVFilterPad separatefields_inputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.filter_frame = filter_frame,
|
|
},
|
|
{ NULL }
|
|
};
|
|
|
|
static const AVFilterPad separatefields_outputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.config_props = config_props_output,
|
|
},
|
|
{ NULL }
|
|
};
|
|
|
|
AVFilter avfilter_vf_separatefields = {
|
|
.name = "separatefields",
|
|
.description = NULL_IF_CONFIG_SMALL("Split input video frames into fields."),
|
|
.priv_size = sizeof(SeparateFieldsContext),
|
|
.inputs = separatefields_inputs,
|
|
.outputs = separatefields_outputs,
|
|
};
|