2013-04-09 17:35:23 +02:00
|
|
|
/*
|
|
|
|
* 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"
|
2019-05-16 12:31:57 +02:00
|
|
|
#include "filters.h"
|
2013-04-09 17:35:23 +02:00
|
|
|
#include "internal.h"
|
|
|
|
|
2017-05-12 20:00:49 +02:00
|
|
|
typedef struct SeparateFieldsContext {
|
2013-04-09 17:35:23 +02:00
|
|
|
int nb_planes;
|
2013-10-12 16:55:42 +02:00
|
|
|
AVFrame *second;
|
2013-04-09 17:35:23 +02:00
|
|
|
} SeparateFieldsContext;
|
|
|
|
|
|
|
|
static int config_props_output(AVFilterLink *outlink)
|
|
|
|
{
|
|
|
|
AVFilterContext *ctx = outlink->src;
|
2015-08-30 17:46:08 +02:00
|
|
|
SeparateFieldsContext *s = ctx->priv;
|
2013-04-09 17:35:23 +02:00
|
|
|
AVFilterLink *inlink = ctx->inputs[0];
|
|
|
|
|
2015-08-30 17:46:08 +02:00
|
|
|
s->nb_planes = av_pix_fmt_count_planes(inlink->format);
|
2013-04-09 17:35:23 +02:00
|
|
|
|
|
|
|
if (inlink->h & 1) {
|
|
|
|
av_log(ctx, AV_LOG_ERROR, "height must be even\n");
|
|
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
}
|
|
|
|
|
2013-04-10 02:38:07 +02:00
|
|
|
outlink->time_base.num = inlink->time_base.num;
|
|
|
|
outlink->time_base.den = inlink->time_base.den * 2;
|
2013-04-09 17:35:23 +02:00
|
|
|
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;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2013-10-12 16:55:42 +02:00
|
|
|
static void extract_field(AVFrame *frame, int nb_planes, int type)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = 0; i < nb_planes; i++) {
|
|
|
|
if (type)
|
|
|
|
frame->data[i] = frame->data[i] + frame->linesize[i];
|
|
|
|
frame->linesize[i] *= 2;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2013-04-09 17:35:23 +02:00
|
|
|
static int filter_frame(AVFilterLink *inlink, AVFrame *inpicref)
|
|
|
|
{
|
|
|
|
AVFilterContext *ctx = inlink->dst;
|
2015-08-30 17:46:08 +02:00
|
|
|
SeparateFieldsContext *s = ctx->priv;
|
2013-04-09 17:35:23 +02:00
|
|
|
AVFilterLink *outlink = ctx->outputs[0];
|
2013-10-12 16:55:42 +02:00
|
|
|
int ret;
|
2013-04-09 17:35:23 +02:00
|
|
|
|
|
|
|
inpicref->height = outlink->h;
|
|
|
|
inpicref->interlaced_frame = 0;
|
|
|
|
|
2015-08-30 17:46:08 +02:00
|
|
|
if (!s->second) {
|
2013-10-12 16:55:42 +02:00
|
|
|
goto clone;
|
|
|
|
} else {
|
2015-08-30 17:46:08 +02:00
|
|
|
AVFrame *second = s->second;
|
2013-04-09 17:35:23 +02:00
|
|
|
|
2015-08-30 17:46:08 +02:00
|
|
|
extract_field(second, s->nb_planes, second->top_field_first);
|
2013-10-12 16:55:42 +02:00
|
|
|
|
|
|
|
if (second->pts != AV_NOPTS_VALUE &&
|
|
|
|
inpicref->pts != AV_NOPTS_VALUE)
|
|
|
|
second->pts += inpicref->pts;
|
2013-04-09 17:35:23 +02:00
|
|
|
else
|
2013-10-12 16:55:42 +02:00
|
|
|
second->pts = AV_NOPTS_VALUE;
|
|
|
|
|
|
|
|
ret = ff_filter_frame(outlink, second);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
clone:
|
2015-08-30 17:46:08 +02:00
|
|
|
s->second = av_frame_clone(inpicref);
|
|
|
|
if (!s->second)
|
2013-10-12 16:55:42 +02:00
|
|
|
return AVERROR(ENOMEM);
|
2013-04-09 17:35:23 +02:00
|
|
|
}
|
|
|
|
|
2015-08-30 17:46:08 +02:00
|
|
|
extract_field(inpicref, s->nb_planes, !inpicref->top_field_first);
|
2013-10-12 16:55:42 +02:00
|
|
|
|
|
|
|
if (inpicref->pts != AV_NOPTS_VALUE)
|
|
|
|
inpicref->pts *= 2;
|
|
|
|
|
|
|
|
return ff_filter_frame(outlink, inpicref);
|
|
|
|
}
|
|
|
|
|
2019-05-16 12:31:57 +02:00
|
|
|
static int flush_frame(AVFilterLink *outlink, int64_t pts, int64_t *out_pts)
|
2013-10-12 16:55:42 +02:00
|
|
|
{
|
|
|
|
AVFilterContext *ctx = outlink->src;
|
2015-08-30 17:46:08 +02:00
|
|
|
SeparateFieldsContext *s = ctx->priv;
|
2019-05-16 12:31:57 +02:00
|
|
|
int ret = 0;
|
2013-10-12 16:55:42 +02:00
|
|
|
|
2019-05-16 12:31:57 +02:00
|
|
|
if (s->second) {
|
|
|
|
*out_pts = s->second->pts += pts;
|
2015-08-30 17:46:08 +02:00
|
|
|
extract_field(s->second, s->nb_planes, s->second->top_field_first);
|
|
|
|
ret = ff_filter_frame(outlink, s->second);
|
2019-05-16 12:31:57 +02:00
|
|
|
s->second = NULL;
|
2013-08-21 22:02:25 +02:00
|
|
|
}
|
2013-04-15 17:42:04 +02:00
|
|
|
|
2013-10-12 16:55:42 +02:00
|
|
|
return ret;
|
2013-04-09 17:35:23 +02:00
|
|
|
}
|
|
|
|
|
2019-05-16 12:31:57 +02:00
|
|
|
static int activate(AVFilterContext *ctx)
|
|
|
|
{
|
|
|
|
AVFilterLink *inlink = ctx->inputs[0];
|
|
|
|
AVFilterLink *outlink = ctx->outputs[0];
|
|
|
|
AVFrame *in;
|
|
|
|
int64_t pts;
|
|
|
|
int ret, status;
|
|
|
|
|
|
|
|
FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
|
|
|
|
|
|
|
|
ret = ff_inlink_consume_frame(inlink, &in);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
if (ret > 0)
|
|
|
|
return filter_frame(inlink, in);
|
|
|
|
|
|
|
|
if (ff_inlink_acknowledge_status(inlink, &status, &pts)) {
|
|
|
|
if (status == AVERROR_EOF) {
|
|
|
|
int64_t out_pts = pts;
|
|
|
|
|
|
|
|
ret = flush_frame(outlink, pts, &out_pts);
|
|
|
|
ff_outlink_set_status(outlink, status, out_pts);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
FF_FILTER_FORWARD_WANTED(outlink, inlink);
|
|
|
|
|
|
|
|
return FFERROR_NOT_READY;
|
|
|
|
}
|
|
|
|
|
2017-08-08 18:45:32 +02:00
|
|
|
static av_cold void uninit(AVFilterContext *ctx)
|
|
|
|
{
|
|
|
|
SeparateFieldsContext *s = ctx->priv;
|
|
|
|
|
|
|
|
av_frame_free(&s->second);
|
|
|
|
}
|
|
|
|
|
2013-04-09 17:35:23 +02:00
|
|
|
static const AVFilterPad separatefields_inputs[] = {
|
|
|
|
{
|
2013-09-07 14:13:50 +02:00
|
|
|
.name = "default",
|
|
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
2013-04-09 17:35:23 +02:00
|
|
|
},
|
|
|
|
{ NULL }
|
|
|
|
};
|
|
|
|
|
|
|
|
static const AVFilterPad separatefields_outputs[] = {
|
|
|
|
{
|
2013-10-12 16:55:42 +02:00
|
|
|
.name = "default",
|
|
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
|
|
.config_props = config_props_output,
|
2013-04-09 17:35:23 +02:00
|
|
|
},
|
|
|
|
{ NULL }
|
|
|
|
};
|
|
|
|
|
2013-10-29 11:50:56 +01:00
|
|
|
AVFilter ff_vf_separatefields = {
|
2013-09-07 14:13:50 +02:00
|
|
|
.name = "separatefields",
|
|
|
|
.description = NULL_IF_CONFIG_SMALL("Split input video frames into fields."),
|
|
|
|
.priv_size = sizeof(SeparateFieldsContext),
|
2019-05-16 12:31:57 +02:00
|
|
|
.activate = activate,
|
2017-08-08 18:45:32 +02:00
|
|
|
.uninit = uninit,
|
2013-09-07 14:13:50 +02:00
|
|
|
.inputs = separatefields_inputs,
|
|
|
|
.outputs = separatefields_outputs,
|
2013-04-09 17:35:23 +02:00
|
|
|
};
|