/* * 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/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++) {        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;    int64_t pts;     for (int i = 0; i < ctx->nb_outputs; i++) {        FF_FILTER_FORWARD_STATUS_BACK_ALL(ctx->outputs[i], ctx);    }     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); static const AVFilterPad avfilter_vf_split_inputs[] = {    {        .name         = "default",        .type         = AVMEDIA_TYPE_VIDEO,    },}; 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(avfilter_vf_split_inputs),    .outputs     = NULL,    .flags       = AVFILTER_FLAG_DYNAMIC_OUTPUTS | AVFILTER_FLAG_METADATA_ONLY,}; static const AVFilterPad avfilter_af_asplit_inputs[] = {    {        .name         = "default",        .type         = AVMEDIA_TYPE_AUDIO,    },}; 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(avfilter_af_asplit_inputs),    .outputs     = NULL,    .flags       = AVFILTER_FLAG_DYNAMIC_OUTPUTS | AVFILTER_FLAG_METADATA_ONLY,};