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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/internal.h"
#include "libavutil/mem.h"
#include "avfilter.h"
#include "audio.h"
#include "internal.h"
#include "video.h"
static int split_init(AVFilterContext *ctx, const char *args)
{
int i, nb_outputs = 2;
if (args) {
nb_outputs = strtol(args, NULL, 0);
if (nb_outputs <= 0) {
av_log(ctx, AV_LOG_ERROR, "Invalid number of outputs specified: %d.\n",
nb_outputs);
return AVERROR(EINVAL);
}
}
for (i = 0; i < nb_outputs; i++) {
char name[32];
AVFilterPad pad = { 0 };
snprintf(name, sizeof(name), "output%d", i);
pad.type = ctx->filter->inputs[0].type;
pad.name = av_strdup(name);
pad.rej_perms = AV_PERM_WRITE;
ff_insert_outpad(ctx, i, &pad);
}
return 0;
}
static void split_uninit(AVFilterContext *ctx)
{
int i;
for (i = 0; i < ctx->nb_outputs; i++)
av_freep(&ctx->output_pads[i].name);
}
static int start_frame(AVFilterLink *inlink, AVFilterBufferRef *picref)
{
AVFilterContext *ctx = inlink->dst;
int i, ret = AVERROR_EOF;
for (i = 0; i < ctx->nb_outputs; i++) {
AVFilterBufferRef *buf_out;
if (ctx->outputs[i]->closed)
continue;
buf_out = avfilter_ref_buffer(picref, ~AV_PERM_WRITE);
if (!buf_out)
return AVERROR(ENOMEM);
ret = ff_start_frame(ctx->outputs[i], buf_out);
if (ret < 0)
break;
}
return ret;
}
static int draw_slice(AVFilterLink *inlink, int y, int h, int slice_dir)
{
AVFilterContext *ctx = inlink->dst;
int i, ret = AVERROR_EOF;
for (i = 0; i < ctx->nb_outputs; i++) {
if (ctx->outputs[i]->closed)
continue;
ret = ff_draw_slice(ctx->outputs[i], y, h, slice_dir);
if (ret < 0)
break;
}
return ret;
}
static int end_frame(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->dst;
int i, ret = AVERROR_EOF;
for (i = 0; i < ctx->nb_outputs; i++) {
if (ctx->outputs[i]->closed)
continue;
ret = ff_end_frame(ctx->outputs[i]);
if (ret < 0)
break;
}
return ret;
}
AVFilter avfilter_vf_split = {
.name = "split",
.description = NULL_IF_CONFIG_SMALL("Pass on the input video to N outputs."),
.init = split_init,
.uninit = split_uninit,
.inputs = (const AVFilterPad[]) {{ .name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.get_video_buffer= ff_null_get_video_buffer,
.start_frame = start_frame,
.draw_slice = draw_slice,
.end_frame = end_frame, },
{ .name = NULL}},
.outputs = NULL,
};
static int filter_samples(AVFilterLink *inlink, AVFilterBufferRef *samplesref)
{
AVFilterContext *ctx = inlink->dst;
int i, ret = 0;
for (i = 0; i < ctx->nb_outputs; i++) {
AVFilterBufferRef *buf_out = avfilter_ref_buffer(samplesref,
~AV_PERM_WRITE);
if (!buf_out) {
ret = AVERROR(ENOMEM);
break;
}
ret = ff_filter_samples(inlink->dst->outputs[i], buf_out);
if (ret < 0)
break;
}
avfilter_unref_buffer(samplesref);
return ret;
}
AVFilter avfilter_af_asplit = {
.name = "asplit",
.description = NULL_IF_CONFIG_SMALL("Pass on the audio input to N audio outputs."),
.init = split_init,
.uninit = split_uninit,
.inputs = (const AVFilterPad[]) {{ .name = "default",
.type = AVMEDIA_TYPE_AUDIO,
.get_audio_buffer = ff_null_get_audio_buffer,
.filter_samples = filter_samples },
{ .name = NULL }},
.outputs = NULL,
};
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