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/*
* Copyright (c) 2007 Bobby Bingham
*
* 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
* audio and video splitter
*/
#include <stdio.h>
#include "libavutil/attributes.h"
#include "libavutil/avstring.h"
#include "libavutil/internal.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "audio.h"
#include "filters.h"
#include "internal.h"
#include "video.h"
typedef struct SplitContext {
const AVClass *class;
int nb_outputs;
} SplitContext;
static av_cold int split_init(AVFilterContext *ctx)
{
SplitContext *s = ctx->priv;
int i, ret;
for (i = 0; i < s->nb_outputs; i++) {
AVFilterPad pad = { 0 };
pad.type = ctx->filter->inputs[0].type;
pad.name = av_asprintf("output%d", i);
if (!pad.name)
return AVERROR(ENOMEM);
if ((ret = ff_append_outpad_free_name(ctx, &pad)) < 0)
return ret;
}
return 0;
}
static int activate(AVFilterContext *ctx)
{
AVFilterLink *inlink = ctx->inputs[0];
AVFrame *in;
int status, ret, nb_eofs = 0;
int64_t pts;
for (int i = 0; i < ctx->nb_outputs; i++)
nb_eofs += ff_outlink_get_status(ctx->outputs[i]) == AVERROR_EOF;
if (nb_eofs == ctx->nb_outputs) {
ff_inlink_set_status(inlink, AVERROR_EOF);
return 0;
}
ret = ff_inlink_consume_frame(inlink, &in);
if (ret < 0)
return ret;
if (ret > 0) {
for (int i = 0; i < ctx->nb_outputs; i++) {
AVFrame *buf_out;
if (ff_outlink_get_status(ctx->outputs[i]))
continue;
buf_out = av_frame_clone(in);
if (!buf_out) {
ret = AVERROR(ENOMEM);
break;
}
ret = ff_filter_frame(ctx->outputs[i], buf_out);
if (ret < 0)
break;
}
av_frame_free(&in);
if (ret < 0)
return ret;
}
if (ff_inlink_acknowledge_status(inlink, &status, &pts)) {
for (int i = 0; i < ctx->nb_outputs; i++) {
if (ff_outlink_get_status(ctx->outputs[i]))
continue;
ff_outlink_set_status(ctx->outputs[i], status, pts);
}
return 0;
}
for (int i = 0; i < ctx->nb_outputs; i++) {
if (ff_outlink_get_status(ctx->outputs[i]))
continue;
if (ff_outlink_frame_wanted(ctx->outputs[i])) {
ff_inlink_request_frame(inlink);
return 0;
}
}
return FFERROR_NOT_READY;
}
#define OFFSET(x) offsetof(SplitContext, x)
#define FLAGS (AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM)
static const AVOption options[] = {
{ "outputs", "set number of outputs", OFFSET(nb_outputs), AV_OPT_TYPE_INT, { .i64 = 2 }, 1, INT_MAX, FLAGS },
{ NULL }
};
AVFILTER_DEFINE_CLASS_EXT(split, "(a)split", options);
const AVFilter ff_vf_split = {
.name = "split",
.description = NULL_IF_CONFIG_SMALL("Pass on the input to N video outputs."),
.priv_size = sizeof(SplitContext),
.priv_class = &split_class,
.init = split_init,
.activate = activate,
FILTER_INPUTS(ff_video_default_filterpad),
.outputs = NULL,
.flags = AVFILTER_FLAG_DYNAMIC_OUTPUTS | AVFILTER_FLAG_METADATA_ONLY,
};
const AVFilter ff_af_asplit = {
.name = "asplit",
.description = NULL_IF_CONFIG_SMALL("Pass on the audio input to N audio outputs."),
.priv_class = &split_class,
.priv_size = sizeof(SplitContext),
.init = split_init,
.activate = activate,
FILTER_INPUTS(ff_audio_default_filterpad),
.outputs = NULL,
.flags = AVFILTER_FLAG_DYNAMIC_OUTPUTS | AVFILTER_FLAG_METADATA_ONLY,
};
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