/* * 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 "filters.h"#include "formats.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++) {        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);        if (!pad.name)            return AVERROR(ENOMEM);         if ((ret = ff_insert_outpad(ctx, i, &pad)) < 0) {            av_freep(&pad.name);            return ret;        }    }     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 (ff_outlink_get_status(ctx->outputs[i]))            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 | 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 }}; #define split_options optionsAVFILTER_DEFINE_CLASS(split); #define asplit_options optionsAVFILTER_DEFINE_CLASS(asplit); static const AVFilterPad avfilter_vf_split_inputs[] = {    {        .name         = "default",        .type         = AVMEDIA_TYPE_VIDEO,        .filter_frame = filter_frame,    },    { NULL }}; 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,    .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,        .filter_frame = filter_frame,    },    { NULL }}; AVFilter ff_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,};