| /* |
| * 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/opt.h" |
| |
| #include "avfilter.h" |
| #include "audio.h" |
| #include "filters.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, nb_eofs = 0; |
| int64_t pts; |
| |
| for (int i = 0; i < ctx->nb_outputs; i++) |
| nb_eofs += ff_outlink_get_status(ctx->outputs[i]) == AVERROR_EOF; |
| |
| if (nb_eofs == ctx->nb_outputs) { |
| ff_inlink_set_status(inlink, AVERROR_EOF); |
| return 0; |
| } |
| |
| 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); |
| |
| 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(ff_video_default_filterpad), |
| .outputs = NULL, |
| .flags = AVFILTER_FLAG_DYNAMIC_OUTPUTS | AVFILTER_FLAG_METADATA_ONLY, |
| }; |
| |
| 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(ff_audio_default_filterpad), |
| .outputs = NULL, |
| .flags = AVFILTER_FLAG_DYNAMIC_OUTPUTS | AVFILTER_FLAG_METADATA_ONLY, |
| }; |