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/*
* 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 "dualinput.h"
#include "libavutil/timestamp.h"
static int process_frame(FFFrameSync *fs)
{
AVFilterContext *ctx = fs->parent;
FFDualInputContext *s = fs->opaque;
AVFrame *mainpic = NULL, *secondpic = NULL;
int ret = 0;
if ((ret = ff_framesync_get_frame(&s->fs, 0, &mainpic, 1)) < 0 ||
(ret = ff_framesync_get_frame(&s->fs, 1, &secondpic, 0)) < 0) {
av_frame_free(&mainpic);
return ret;
}
av_assert0(mainpic);
mainpic->pts = av_rescale_q(mainpic->pts, s->fs.time_base, ctx->outputs[0]->time_base);
if (secondpic && !ctx->is_disabled)
mainpic = s->process(ctx, mainpic, secondpic);
ret = ff_filter_frame(ctx->outputs[0], mainpic);
av_assert1(ret != AVERROR(EAGAIN));
return ret;
}
int ff_dualinput_init(AVFilterContext *ctx, FFDualInputContext *s)
{
FFFrameSyncIn *in;
int ret;
if ((ret = ff_framesync_init(&s->fs, ctx, 2)) < 0)
return ret;
in = s->fs.in;
s->fs.opaque = s;
s->fs.on_event = process_frame;
in[0].time_base = ctx->inputs[0]->time_base;
in[1].time_base = ctx->inputs[1]->time_base;
in[0].sync = 2;
in[0].before = EXT_STOP;
in[0].after = EXT_INFINITY;
in[1].sync = 1;
in[1].before = EXT_NULL;
in[1].after = EXT_INFINITY;
if (s->shortest)
in[0].after = in[1].after = EXT_STOP;
if (!s->repeatlast) {
in[1].after = EXT_NULL;
in[1].sync = 0;
}
return ff_framesync_configure(&s->fs);
}
int ff_dualinput_filter_frame(FFDualInputContext *s,
AVFilterLink *inlink, AVFrame *in)
{
return ff_framesync_filter_frame(&s->fs, inlink, in);
}
int ff_dualinput_request_frame(FFDualInputContext *s, AVFilterLink *outlink)
{
return ff_framesync_request_frame(&s->fs, outlink);
}
void ff_dualinput_uninit(FFDualInputContext *s)
{
ff_framesync_uninit(&s->fs);
}
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