yading@10: /*
yading@10:  * Copyright (c) 2007 Bobby Bingham
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: /**
yading@10:  * @file
yading@10:  * audio and video splitter
yading@10:  */
yading@10: 
yading@10: #include <stdio.h>
yading@10: 
yading@10: #include "libavutil/internal.h"
yading@10: #include "libavutil/mem.h"
yading@10: #include "libavutil/opt.h"
yading@10: 
yading@10: #include "avfilter.h"
yading@10: #include "audio.h"
yading@10: #include "internal.h"
yading@10: #include "video.h"
yading@10: 
yading@10: typedef struct SplitContext {
yading@10:     const AVClass *class;
yading@10:     int nb_outputs;
yading@10: } SplitContext;
yading@10: 
yading@10: static int split_init(AVFilterContext *ctx)
yading@10: {
yading@10:     SplitContext *s = ctx->priv;
yading@10:     int i;
yading@10: 
yading@10:     for (i = 0; i < s->nb_outputs; i++) {
yading@10:         char name[32];
yading@10:         AVFilterPad pad = { 0 };
yading@10: 
yading@10:         snprintf(name, sizeof(name), "output%d", i);
yading@10:         pad.type = ctx->filter->inputs[0].type;
yading@10:         pad.name = av_strdup(name);
yading@10: 
yading@10:         ff_insert_outpad(ctx, i, &pad);
yading@10:     }
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static void split_uninit(AVFilterContext *ctx)
yading@10: {
yading@10:     int i;
yading@10: 
yading@10:     for (i = 0; i < ctx->nb_outputs; i++)
yading@10:         av_freep(&ctx->output_pads[i].name);
yading@10: }
yading@10: 
yading@10: static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
yading@10: {
yading@10:     AVFilterContext *ctx = inlink->dst;
yading@10:     int i, ret = AVERROR_EOF;
yading@10: 
yading@10:     for (i = 0; i < ctx->nb_outputs; i++) {
yading@10:         AVFrame *buf_out;
yading@10: 
yading@10:         if (ctx->outputs[i]->closed)
yading@10:             continue;
yading@10:         buf_out = av_frame_clone(frame);
yading@10:         if (!buf_out) {
yading@10:             ret = AVERROR(ENOMEM);
yading@10:             break;
yading@10:         }
yading@10: 
yading@10:         ret = ff_filter_frame(ctx->outputs[i], buf_out);
yading@10:         if (ret < 0)
yading@10:             break;
yading@10:     }
yading@10:     av_frame_free(&frame);
yading@10:     return ret;
yading@10: }
yading@10: 
yading@10: #define OFFSET(x) offsetof(SplitContext, x)
yading@10: #define FLAGS AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_VIDEO_PARAM
yading@10: static const AVOption options[] = {
yading@10:     { "outputs", "set number of outputs", OFFSET(nb_outputs), AV_OPT_TYPE_INT, { .i64 = 2 }, 1, INT_MAX, FLAGS },
yading@10:     { NULL },
yading@10: };
yading@10: 
yading@10: #define split_options options
yading@10: AVFILTER_DEFINE_CLASS(split);
yading@10: 
yading@10: #define asplit_options options
yading@10: AVFILTER_DEFINE_CLASS(asplit);
yading@10: 
yading@10: static const AVFilterPad avfilter_vf_split_inputs[] = {
yading@10:     {
yading@10:         .name             = "default",
yading@10:         .type             = AVMEDIA_TYPE_VIDEO,
yading@10:         .get_video_buffer = ff_null_get_video_buffer,
yading@10:         .filter_frame     = filter_frame,
yading@10:     },
yading@10:     { NULL }
yading@10: };
yading@10: 
yading@10: AVFilter avfilter_vf_split = {
yading@10:     .name      = "split",
yading@10:     .description = NULL_IF_CONFIG_SMALL("Pass on the input video to N outputs."),
yading@10: 
yading@10:     .priv_size  = sizeof(SplitContext),
yading@10:     .priv_class = &split_class,
yading@10: 
yading@10:     .init   = split_init,
yading@10:     .uninit = split_uninit,
yading@10: 
yading@10:     .inputs    = avfilter_vf_split_inputs,
yading@10:     .outputs   = NULL,
yading@10: 
yading@10:     .flags     = AVFILTER_FLAG_DYNAMIC_OUTPUTS,
yading@10: };
yading@10: 
yading@10: static const AVFilterPad avfilter_af_asplit_inputs[] = {
yading@10:     {
yading@10:         .name             = "default",
yading@10:         .type             = AVMEDIA_TYPE_AUDIO,
yading@10:         .get_audio_buffer = ff_null_get_audio_buffer,
yading@10:         .filter_frame     = filter_frame,
yading@10:     },
yading@10:     { NULL }
yading@10: };
yading@10: 
yading@10: AVFilter avfilter_af_asplit = {
yading@10:     .name        = "asplit",
yading@10:     .description = NULL_IF_CONFIG_SMALL("Pass on the audio input to N audio outputs."),
yading@10: 
yading@10:     .priv_size  = sizeof(SplitContext),
yading@10:     .priv_class = &asplit_class,
yading@10: 
yading@10:     .init   = split_init,
yading@10:     .uninit = split_uninit,
yading@10: 
yading@10:     .inputs  = avfilter_af_asplit_inputs,
yading@10:     .outputs = NULL,
yading@10: 
yading@10:     .flags   = AVFILTER_FLAG_DYNAMIC_OUTPUTS,
yading@10: };