/*

  * 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/internal.h"
 #include "libavutil/mem.h"

 #include "libavutil/opt.h"
 

 #include "avfilter.h"

 #include "audio.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;

     for (i = 0; i < s->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);
 

         ff_insert_outpad(ctx, i, &pad);

     }
 
     return 0;
 }
 

 static av_cold void split_uninit(AVFilterContext *ctx)

 {
     int i;
 

     for (i = 0; i < ctx->nb_outputs; i++)

         av_freep(&ctx->output_pads[i].name);
 }
 

 static int filter_frame(AVFilterLink *inlink, AVFrame *frame)

 {

     AVFilterContext *ctx = inlink->dst;

     int i, ret = AVERROR_EOF;

     for (i = 0; i < ctx->nb_outputs; i++) {

         AVFrame *buf_out;

 
         if (ctx->outputs[i]->closed)
             continue;

         buf_out = av_frame_clone(frame);

         if (!buf_out) {
             ret = AVERROR(ENOMEM);

             break;

         }

         ret = ff_filter_frame(ctx->outputs[i], buf_out);

         if (ret < 0)
             break;
     }

     av_frame_free(&frame);

     return ret;

 }
 

 #define OFFSET(x) offsetof(SplitContext, x)
 #define FLAGS AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_VIDEO_PARAM
 static const AVOption options[] = {

     { "outputs", "set number of outputs", OFFSET(nb_outputs), AV_OPT_TYPE_INT, { .i64 = 2 }, 1, INT_MAX, FLAGS },

     { NULL },
 };
 

 #define split_options options
 AVFILTER_DEFINE_CLASS(split);

 #define asplit_options options
 AVFILTER_DEFINE_CLASS(asplit);

 static const AVFilterPad avfilter_vf_split_inputs[] = {
     {
         .name             = "default",
         .type             = AVMEDIA_TYPE_VIDEO,
         .get_video_buffer = ff_null_get_video_buffer,

         .filter_frame     = filter_frame,

     },
     { NULL }
 };
 

 AVFilter avfilter_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,
     .uninit = split_uninit,
 

     .inputs    = avfilter_vf_split_inputs,

     .outputs   = NULL,

 
     .flags     = AVFILTER_FLAG_DYNAMIC_OUTPUTS,

 };

 static const AVFilterPad avfilter_af_asplit_inputs[] = {
     {
         .name             = "default",
         .type             = AVMEDIA_TYPE_AUDIO,
         .get_audio_buffer = ff_null_get_audio_buffer,

         .filter_frame     = filter_frame,

     },
     { NULL }
 };
 

 AVFilter avfilter_af_asplit = {

     .name        = "asplit",

     .description = NULL_IF_CONFIG_SMALL("Pass on the audio input to N audio outputs."),
 

     .priv_size  = sizeof(SplitContext),
     .priv_class = &asplit_class,
 

     .init   = split_init,
     .uninit = split_uninit,
 

     .inputs  = avfilter_af_asplit_inputs,

     .outputs = NULL,

 
     .flags   = AVFILTER_FLAG_DYNAMIC_OUTPUTS,

 };