mirror of
https://github.com/FFmpeg/FFmpeg.git
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84 lines
2.5 KiB
C
84 lines
2.5 KiB
C
/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "dualinput.h"
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#include "libavutil/timestamp.h"
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static int process_frame(FFFrameSync *fs)
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{
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AVFilterContext *ctx = fs->parent;
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FFDualInputContext *s = fs->opaque;
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AVFrame *mainpic = NULL, *secondpic = NULL;
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int ret = 0;
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if ((ret = ff_framesync_get_frame(&s->fs, 0, &mainpic, 1)) < 0 ||
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(ret = ff_framesync_get_frame(&s->fs, 1, &secondpic, 0)) < 0) {
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av_frame_free(&mainpic);
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return ret;
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}
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av_assert0(mainpic);
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mainpic->pts = av_rescale_q(mainpic->pts, s->fs.time_base, ctx->outputs[0]->time_base);
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if (secondpic && !ctx->is_disabled)
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mainpic = s->process(ctx, mainpic, secondpic);
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ret = ff_filter_frame(ctx->outputs[0], mainpic);
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av_assert1(ret != AVERROR(EAGAIN));
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return ret;
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}
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int ff_dualinput_init(AVFilterContext *ctx, FFDualInputContext *s)
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{
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FFFrameSyncIn *in = s->fs.in;
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ff_framesync_init(&s->fs, ctx, 2);
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s->fs.opaque = s;
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s->fs.on_event = process_frame;
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in[0].time_base = ctx->inputs[0]->time_base;
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in[1].time_base = ctx->inputs[1]->time_base;
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in[0].sync = 2;
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in[0].before = EXT_STOP;
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in[0].after = EXT_INFINITY;
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in[1].sync = 1;
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in[1].before = EXT_NULL;
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in[1].after = EXT_INFINITY;
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if (s->shortest)
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in[1].after = EXT_STOP;
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if (!s->repeatlast) {
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in[0].after = EXT_STOP;
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in[1].sync = 0;
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}
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return ff_framesync_configure(&s->fs);
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}
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int ff_dualinput_filter_frame(FFDualInputContext *s,
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AVFilterLink *inlink, AVFrame *in)
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{
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return ff_framesync_filter_frame(&s->fs, inlink, in);
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}
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int ff_dualinput_request_frame(FFDualInputContext *s, AVFilterLink *outlink)
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{
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return ff_framesync_request_frame(&s->fs, outlink);
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}
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void ff_dualinput_uninit(FFDualInputContext *s)
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{
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ff_framesync_uninit(&s->fs);
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}
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