2 * Copyright (c) 2007 Bobby Bingham
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 * audio and video splitter
28 #include "libavutil/attributes.h"
29 #include "libavutil/internal.h"
30 #include "libavutil/mem.h"
31 #include "libavutil/opt.h"
38 typedef struct SplitContext {
43 static av_cold int split_init(AVFilterContext *ctx)
45 SplitContext *s = ctx->priv;
48 for (i = 0; i < s->nb_outputs; i++) {
50 AVFilterPad pad = { 0 };
52 snprintf(name, sizeof(name), "output%d", i);
53 pad.type = ctx->filter->inputs[0].type;
54 pad.name = av_strdup(name);
56 return AVERROR(ENOMEM);
58 ff_insert_outpad(ctx, i, &pad);
64 static av_cold void split_uninit(AVFilterContext *ctx)
68 for (i = 0; i < ctx->nb_outputs; i++)
69 av_freep(&ctx->output_pads[i].name);
72 static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
74 AVFilterContext *ctx = inlink->dst;
75 int i, ret = AVERROR_EOF;
77 for (i = 0; i < ctx->nb_outputs; i++) {
80 if (ctx->outputs[i]->closed)
82 buf_out = av_frame_clone(frame);
84 ret = AVERROR(ENOMEM);
88 ret = ff_filter_frame(ctx->outputs[i], buf_out);
92 av_frame_free(&frame);
96 #define OFFSET(x) offsetof(SplitContext, x)
97 #define FLAGS AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_VIDEO_PARAM
98 static const AVOption options[] = {
99 { "outputs", "set number of outputs", OFFSET(nb_outputs), AV_OPT_TYPE_INT, { .i64 = 2 }, 1, INT_MAX, FLAGS },
103 #define split_options options
104 AVFILTER_DEFINE_CLASS(split);
106 #define asplit_options options
107 AVFILTER_DEFINE_CLASS(asplit);
109 static const AVFilterPad avfilter_vf_split_inputs[] = {
112 .type = AVMEDIA_TYPE_VIDEO,
113 .filter_frame = filter_frame,
118 AVFilter ff_vf_split = {
120 .description = NULL_IF_CONFIG_SMALL("Pass on the input to N video outputs."),
121 .priv_size = sizeof(SplitContext),
122 .priv_class = &split_class,
124 .uninit = split_uninit,
125 .inputs = avfilter_vf_split_inputs,
127 .flags = AVFILTER_FLAG_DYNAMIC_OUTPUTS,
130 static const AVFilterPad avfilter_af_asplit_inputs[] = {
133 .type = AVMEDIA_TYPE_AUDIO,
134 .filter_frame = filter_frame,
139 AVFilter ff_af_asplit = {
141 .description = NULL_IF_CONFIG_SMALL("Pass on the audio input to N audio outputs."),
142 .priv_size = sizeof(SplitContext),
143 .priv_class = &asplit_class,
145 .uninit = split_uninit,
146 .inputs = avfilter_af_asplit_inputs,
148 .flags = AVFILTER_FLAG_DYNAMIC_OUTPUTS,