723 lines
25 KiB
C
723 lines
25 KiB
C
/*
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* filter graphs
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* Copyright (c) 2008 Vitor Sessak
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* Copyright (c) 2007 Bobby Bingham
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <string.h>
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#include "libavutil/avassert.h"
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#include "libavutil/avstring.h"
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#include "libavutil/channel_layout.h"
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#include "libavutil/common.h"
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#include "libavutil/log.h"
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#include "avfilter.h"
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#include "avfiltergraph.h"
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#include "formats.h"
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#include "internal.h"
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static const AVClass filtergraph_class = {
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.class_name = "AVFilterGraph",
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.item_name = av_default_item_name,
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.version = LIBAVUTIL_VERSION_INT,
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};
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AVFilterGraph *avfilter_graph_alloc(void)
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{
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AVFilterGraph *ret = av_mallocz(sizeof(*ret));
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if (!ret)
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return NULL;
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ret->av_class = &filtergraph_class;
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return ret;
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}
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void avfilter_graph_free(AVFilterGraph **graph)
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{
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if (!*graph)
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return;
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for (; (*graph)->nb_filters > 0; (*graph)->nb_filters--)
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avfilter_free((*graph)->filters[(*graph)->nb_filters - 1]);
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av_freep(&(*graph)->scale_sws_opts);
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av_freep(&(*graph)->resample_lavr_opts);
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av_freep(&(*graph)->filters);
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av_freep(graph);
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}
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int avfilter_graph_add_filter(AVFilterGraph *graph, AVFilterContext *filter)
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{
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AVFilterContext **filters = av_realloc(graph->filters,
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sizeof(*filters) * (graph->nb_filters + 1));
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if (!filters)
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return AVERROR(ENOMEM);
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graph->filters = filters;
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graph->filters[graph->nb_filters++] = filter;
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#if FF_API_FOO_COUNT
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graph->filter_count = graph->nb_filters;
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#endif
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return 0;
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}
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int avfilter_graph_create_filter(AVFilterContext **filt_ctx, AVFilter *filt,
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const char *name, const char *args, void *opaque,
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AVFilterGraph *graph_ctx)
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{
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int ret;
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if ((ret = avfilter_open(filt_ctx, filt, name)) < 0)
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goto fail;
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if ((ret = avfilter_init_filter(*filt_ctx, args, opaque)) < 0)
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goto fail;
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if ((ret = avfilter_graph_add_filter(graph_ctx, *filt_ctx)) < 0)
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goto fail;
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return 0;
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fail:
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if (*filt_ctx)
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avfilter_free(*filt_ctx);
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*filt_ctx = NULL;
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return ret;
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}
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/**
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* Check for the validity of graph.
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*
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* A graph is considered valid if all its input and output pads are
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* connected.
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*
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* @return 0 in case of success, a negative value otherwise
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*/
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static int graph_check_validity(AVFilterGraph *graph, AVClass *log_ctx)
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{
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AVFilterContext *filt;
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int i, j;
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for (i = 0; i < graph->nb_filters; i++) {
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filt = graph->filters[i];
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for (j = 0; j < filt->nb_inputs; j++) {
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if (!filt->inputs[j] || !filt->inputs[j]->src) {
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av_log(log_ctx, AV_LOG_ERROR,
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"Input pad \"%s\" for the filter \"%s\" of type \"%s\" not connected to any source\n",
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filt->input_pads[j].name, filt->name, filt->filter->name);
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return AVERROR(EINVAL);
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}
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}
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for (j = 0; j < filt->nb_outputs; j++) {
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if (!filt->outputs[j] || !filt->outputs[j]->dst) {
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av_log(log_ctx, AV_LOG_ERROR,
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"Output pad \"%s\" for the filter \"%s\" of type \"%s\" not connected to any destination\n",
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filt->output_pads[j].name, filt->name, filt->filter->name);
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return AVERROR(EINVAL);
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}
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}
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}
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return 0;
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}
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/**
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* Configure all the links of graphctx.
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*
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* @return 0 in case of success, a negative value otherwise
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*/
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static int graph_config_links(AVFilterGraph *graph, AVClass *log_ctx)
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{
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AVFilterContext *filt;
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int i, ret;
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for (i = 0; i < graph->nb_filters; i++) {
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filt = graph->filters[i];
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if (!filt->nb_outputs) {
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if ((ret = avfilter_config_links(filt)))
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return ret;
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}
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}
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return 0;
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}
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AVFilterContext *avfilter_graph_get_filter(AVFilterGraph *graph, char *name)
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{
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int i;
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for (i = 0; i < graph->nb_filters; i++)
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if (graph->filters[i]->name && !strcmp(name, graph->filters[i]->name))
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return graph->filters[i];
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return NULL;
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}
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static int query_formats(AVFilterGraph *graph, AVClass *log_ctx)
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{
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int i, j, ret;
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int scaler_count = 0, resampler_count = 0;
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/* ask all the sub-filters for their supported media formats */
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for (i = 0; i < graph->nb_filters; i++) {
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if (graph->filters[i]->filter->query_formats)
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graph->filters[i]->filter->query_formats(graph->filters[i]);
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else
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ff_default_query_formats(graph->filters[i]);
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}
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/* go through and merge as many format lists as possible */
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for (i = 0; i < graph->nb_filters; i++) {
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AVFilterContext *filter = graph->filters[i];
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for (j = 0; j < filter->nb_inputs; j++) {
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AVFilterLink *link = filter->inputs[j];
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int convert_needed = 0;
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if (!link)
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continue;
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if (link->in_formats != link->out_formats &&
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!ff_merge_formats(link->in_formats,
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link->out_formats))
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convert_needed = 1;
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if (link->type == AVMEDIA_TYPE_AUDIO) {
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if (link->in_channel_layouts != link->out_channel_layouts &&
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!ff_merge_channel_layouts(link->in_channel_layouts,
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link->out_channel_layouts))
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convert_needed = 1;
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if (link->in_samplerates != link->out_samplerates &&
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!ff_merge_samplerates(link->in_samplerates,
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link->out_samplerates))
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convert_needed = 1;
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}
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if (convert_needed) {
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AVFilterContext *convert;
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AVFilter *filter;
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AVFilterLink *inlink, *outlink;
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char scale_args[256];
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char inst_name[30];
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/* couldn't merge format lists. auto-insert conversion filter */
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switch (link->type) {
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case AVMEDIA_TYPE_VIDEO:
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if (!(filter = avfilter_get_by_name("scale"))) {
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av_log(log_ctx, AV_LOG_ERROR, "'scale' filter "
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"not present, cannot convert pixel formats.\n");
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return AVERROR(EINVAL);
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}
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snprintf(inst_name, sizeof(inst_name), "auto-inserted scaler %d",
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scaler_count++);
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av_strlcpy(scale_args, "0:0", sizeof(scale_args));
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if (graph->scale_sws_opts) {
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av_strlcat(scale_args, ":", sizeof(scale_args));
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av_strlcat(scale_args, graph->scale_sws_opts, sizeof(scale_args));
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}
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if ((ret = avfilter_graph_create_filter(&convert, filter,
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inst_name, scale_args, NULL,
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graph)) < 0)
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return ret;
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break;
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case AVMEDIA_TYPE_AUDIO:
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if (!(filter = avfilter_get_by_name("resample"))) {
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av_log(log_ctx, AV_LOG_ERROR, "'resample' filter "
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"not present, cannot convert audio formats.\n");
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return AVERROR(EINVAL);
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}
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snprintf(inst_name, sizeof(inst_name), "auto-inserted resampler %d",
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resampler_count++);
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scale_args[0] = '\0';
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if (graph->resample_lavr_opts)
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snprintf(scale_args, sizeof(scale_args), "%s",
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graph->resample_lavr_opts);
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if ((ret = avfilter_graph_create_filter(&convert, filter,
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inst_name, scale_args,
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NULL, graph)) < 0)
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return ret;
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break;
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default:
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return AVERROR(EINVAL);
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}
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if ((ret = avfilter_insert_filter(link, convert, 0, 0)) < 0)
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return ret;
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convert->filter->query_formats(convert);
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inlink = convert->inputs[0];
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outlink = convert->outputs[0];
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if (!ff_merge_formats( inlink->in_formats, inlink->out_formats) ||
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!ff_merge_formats(outlink->in_formats, outlink->out_formats))
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ret |= AVERROR(ENOSYS);
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if (inlink->type == AVMEDIA_TYPE_AUDIO &&
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(!ff_merge_samplerates(inlink->in_samplerates,
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inlink->out_samplerates) ||
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!ff_merge_channel_layouts(inlink->in_channel_layouts,
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inlink->out_channel_layouts)))
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ret |= AVERROR(ENOSYS);
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if (outlink->type == AVMEDIA_TYPE_AUDIO &&
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(!ff_merge_samplerates(outlink->in_samplerates,
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outlink->out_samplerates) ||
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!ff_merge_channel_layouts(outlink->in_channel_layouts,
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outlink->out_channel_layouts)))
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ret |= AVERROR(ENOSYS);
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if (ret < 0) {
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av_log(log_ctx, AV_LOG_ERROR,
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"Impossible to convert between the formats supported by the filter "
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"'%s' and the filter '%s'\n", link->src->name, link->dst->name);
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return ret;
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}
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}
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}
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}
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return 0;
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}
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static int pick_format(AVFilterLink *link)
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{
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if (!link || !link->in_formats)
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return 0;
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link->in_formats->format_count = 1;
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link->format = link->in_formats->formats[0];
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if (link->type == AVMEDIA_TYPE_AUDIO) {
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if (!link->in_samplerates->format_count) {
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av_log(link->src, AV_LOG_ERROR, "Cannot select sample rate for"
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" the link between filters %s and %s.\n", link->src->name,
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link->dst->name);
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return AVERROR(EINVAL);
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}
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link->in_samplerates->format_count = 1;
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link->sample_rate = link->in_samplerates->formats[0];
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if (!link->in_channel_layouts->nb_channel_layouts) {
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av_log(link->src, AV_LOG_ERROR, "Cannot select channel layout for"
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"the link between filters %s and %s.\n", link->src->name,
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link->dst->name);
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return AVERROR(EINVAL);
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}
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link->in_channel_layouts->nb_channel_layouts = 1;
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link->channel_layout = link->in_channel_layouts->channel_layouts[0];
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}
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ff_formats_unref(&link->in_formats);
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ff_formats_unref(&link->out_formats);
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ff_formats_unref(&link->in_samplerates);
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ff_formats_unref(&link->out_samplerates);
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ff_channel_layouts_unref(&link->in_channel_layouts);
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ff_channel_layouts_unref(&link->out_channel_layouts);
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return 0;
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}
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#define REDUCE_FORMATS(fmt_type, list_type, list, var, nb, add_format) \
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do { \
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for (i = 0; i < filter->nb_inputs; i++) { \
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AVFilterLink *link = filter->inputs[i]; \
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fmt_type fmt; \
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\
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if (!link->out_ ## list || link->out_ ## list->nb != 1) \
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continue; \
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fmt = link->out_ ## list->var[0]; \
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\
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for (j = 0; j < filter->nb_outputs; j++) { \
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AVFilterLink *out_link = filter->outputs[j]; \
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list_type *fmts; \
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\
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if (link->type != out_link->type || \
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out_link->in_ ## list->nb == 1) \
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continue; \
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fmts = out_link->in_ ## list; \
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\
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if (!out_link->in_ ## list->nb) { \
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add_format(&out_link->in_ ##list, fmt); \
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break; \
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} \
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\
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for (k = 0; k < out_link->in_ ## list->nb; k++) \
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if (fmts->var[k] == fmt) { \
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fmts->var[0] = fmt; \
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fmts->nb = 1; \
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ret = 1; \
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break; \
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} \
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} \
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} \
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} while (0)
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static int reduce_formats_on_filter(AVFilterContext *filter)
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{
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int i, j, k, ret = 0;
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REDUCE_FORMATS(int, AVFilterFormats, formats, formats,
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format_count, ff_add_format);
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REDUCE_FORMATS(int, AVFilterFormats, samplerates, formats,
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format_count, ff_add_format);
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REDUCE_FORMATS(uint64_t, AVFilterChannelLayouts, channel_layouts,
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channel_layouts, nb_channel_layouts, ff_add_channel_layout);
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return ret;
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}
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static void reduce_formats(AVFilterGraph *graph)
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{
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int i, reduced;
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do {
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reduced = 0;
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for (i = 0; i < graph->nb_filters; i++)
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reduced |= reduce_formats_on_filter(graph->filters[i]);
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} while (reduced);
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}
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static void swap_samplerates_on_filter(AVFilterContext *filter)
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{
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AVFilterLink *link = NULL;
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int sample_rate;
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int i, j;
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for (i = 0; i < filter->nb_inputs; i++) {
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link = filter->inputs[i];
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if (link->type == AVMEDIA_TYPE_AUDIO &&
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link->out_samplerates->format_count == 1)
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break;
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}
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if (i == filter->nb_inputs)
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return;
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sample_rate = link->out_samplerates->formats[0];
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for (i = 0; i < filter->nb_outputs; i++) {
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AVFilterLink *outlink = filter->outputs[i];
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int best_idx, best_diff = INT_MAX;
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if (outlink->type != AVMEDIA_TYPE_AUDIO ||
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outlink->in_samplerates->format_count < 2)
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continue;
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for (j = 0; j < outlink->in_samplerates->format_count; j++) {
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int diff = abs(sample_rate - outlink->in_samplerates->formats[j]);
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if (diff < best_diff) {
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best_diff = diff;
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best_idx = j;
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}
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}
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FFSWAP(int, outlink->in_samplerates->formats[0],
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outlink->in_samplerates->formats[best_idx]);
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}
|
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}
|
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|
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static void swap_samplerates(AVFilterGraph *graph)
|
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{
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int i;
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|
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for (i = 0; i < graph->nb_filters; i++)
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swap_samplerates_on_filter(graph->filters[i]);
|
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}
|
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|
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#define CH_CENTER_PAIR (AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER)
|
|
#define CH_FRONT_PAIR (AV_CH_FRONT_LEFT | AV_CH_FRONT_RIGHT)
|
|
#define CH_STEREO_PAIR (AV_CH_STEREO_LEFT | AV_CH_STEREO_RIGHT)
|
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#define CH_WIDE_PAIR (AV_CH_WIDE_LEFT | AV_CH_WIDE_RIGHT)
|
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#define CH_SIDE_PAIR (AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT)
|
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#define CH_DIRECT_PAIR (AV_CH_SURROUND_DIRECT_LEFT | AV_CH_SURROUND_DIRECT_RIGHT)
|
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#define CH_BACK_PAIR (AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT)
|
|
|
|
/* allowable substitutions for channel pairs when comparing layouts,
|
|
* ordered by priority for both values */
|
|
static const uint64_t ch_subst[][2] = {
|
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{ CH_FRONT_PAIR, CH_CENTER_PAIR },
|
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{ CH_FRONT_PAIR, CH_WIDE_PAIR },
|
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{ CH_FRONT_PAIR, AV_CH_FRONT_CENTER },
|
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{ CH_CENTER_PAIR, CH_FRONT_PAIR },
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{ CH_CENTER_PAIR, CH_WIDE_PAIR },
|
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{ CH_CENTER_PAIR, AV_CH_FRONT_CENTER },
|
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{ CH_WIDE_PAIR, CH_FRONT_PAIR },
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{ CH_WIDE_PAIR, CH_CENTER_PAIR },
|
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{ CH_WIDE_PAIR, AV_CH_FRONT_CENTER },
|
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{ AV_CH_FRONT_CENTER, CH_FRONT_PAIR },
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{ AV_CH_FRONT_CENTER, CH_CENTER_PAIR },
|
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{ AV_CH_FRONT_CENTER, CH_WIDE_PAIR },
|
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{ CH_SIDE_PAIR, CH_DIRECT_PAIR },
|
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{ CH_SIDE_PAIR, CH_BACK_PAIR },
|
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{ CH_SIDE_PAIR, AV_CH_BACK_CENTER },
|
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{ CH_BACK_PAIR, CH_DIRECT_PAIR },
|
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{ CH_BACK_PAIR, CH_SIDE_PAIR },
|
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{ CH_BACK_PAIR, AV_CH_BACK_CENTER },
|
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{ AV_CH_BACK_CENTER, CH_BACK_PAIR },
|
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{ AV_CH_BACK_CENTER, CH_DIRECT_PAIR },
|
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{ AV_CH_BACK_CENTER, CH_SIDE_PAIR },
|
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};
|
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|
|
static void swap_channel_layouts_on_filter(AVFilterContext *filter)
|
|
{
|
|
AVFilterLink *link = NULL;
|
|
int i, j, k;
|
|
|
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for (i = 0; i < filter->nb_inputs; i++) {
|
|
link = filter->inputs[i];
|
|
|
|
if (link->type == AVMEDIA_TYPE_AUDIO &&
|
|
link->out_channel_layouts->nb_channel_layouts == 1)
|
|
break;
|
|
}
|
|
if (i == filter->nb_inputs)
|
|
return;
|
|
|
|
for (i = 0; i < filter->nb_outputs; i++) {
|
|
AVFilterLink *outlink = filter->outputs[i];
|
|
int best_idx = -1, best_score = INT_MIN, best_count_diff = INT_MAX;
|
|
|
|
if (outlink->type != AVMEDIA_TYPE_AUDIO ||
|
|
outlink->in_channel_layouts->nb_channel_layouts < 2)
|
|
continue;
|
|
|
|
for (j = 0; j < outlink->in_channel_layouts->nb_channel_layouts; j++) {
|
|
uint64_t in_chlayout = link->out_channel_layouts->channel_layouts[0];
|
|
uint64_t out_chlayout = outlink->in_channel_layouts->channel_layouts[j];
|
|
int in_channels = av_get_channel_layout_nb_channels(in_chlayout);
|
|
int out_channels = av_get_channel_layout_nb_channels(out_chlayout);
|
|
int count_diff = out_channels - in_channels;
|
|
int matched_channels, extra_channels;
|
|
int score = 0;
|
|
|
|
/* channel substitution */
|
|
for (k = 0; k < FF_ARRAY_ELEMS(ch_subst); k++) {
|
|
uint64_t cmp0 = ch_subst[k][0];
|
|
uint64_t cmp1 = ch_subst[k][1];
|
|
if (( in_chlayout & cmp0) && (!(out_chlayout & cmp0)) &&
|
|
(out_chlayout & cmp1) && (!( in_chlayout & cmp1))) {
|
|
in_chlayout &= ~cmp0;
|
|
out_chlayout &= ~cmp1;
|
|
/* add score for channel match, minus a deduction for
|
|
having to do the substitution */
|
|
score += 10 * av_get_channel_layout_nb_channels(cmp1) - 2;
|
|
}
|
|
}
|
|
|
|
/* no penalty for LFE channel mismatch */
|
|
if ( (in_chlayout & AV_CH_LOW_FREQUENCY) &&
|
|
(out_chlayout & AV_CH_LOW_FREQUENCY))
|
|
score += 10;
|
|
in_chlayout &= ~AV_CH_LOW_FREQUENCY;
|
|
out_chlayout &= ~AV_CH_LOW_FREQUENCY;
|
|
|
|
matched_channels = av_get_channel_layout_nb_channels(in_chlayout &
|
|
out_chlayout);
|
|
extra_channels = av_get_channel_layout_nb_channels(out_chlayout &
|
|
(~in_chlayout));
|
|
score += 10 * matched_channels - 5 * extra_channels;
|
|
|
|
if (score > best_score ||
|
|
(count_diff < best_count_diff && score == best_score)) {
|
|
best_score = score;
|
|
best_idx = j;
|
|
best_count_diff = count_diff;
|
|
}
|
|
}
|
|
av_assert0(best_idx >= 0);
|
|
FFSWAP(uint64_t, outlink->in_channel_layouts->channel_layouts[0],
|
|
outlink->in_channel_layouts->channel_layouts[best_idx]);
|
|
}
|
|
|
|
}
|
|
|
|
static void swap_channel_layouts(AVFilterGraph *graph)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < graph->nb_filters; i++)
|
|
swap_channel_layouts_on_filter(graph->filters[i]);
|
|
}
|
|
|
|
static void swap_sample_fmts_on_filter(AVFilterContext *filter)
|
|
{
|
|
AVFilterLink *link = NULL;
|
|
int format, bps;
|
|
int i, j;
|
|
|
|
for (i = 0; i < filter->nb_inputs; i++) {
|
|
link = filter->inputs[i];
|
|
|
|
if (link->type == AVMEDIA_TYPE_AUDIO &&
|
|
link->out_formats->format_count == 1)
|
|
break;
|
|
}
|
|
if (i == filter->nb_inputs)
|
|
return;
|
|
|
|
format = link->out_formats->formats[0];
|
|
bps = av_get_bytes_per_sample(format);
|
|
|
|
for (i = 0; i < filter->nb_outputs; i++) {
|
|
AVFilterLink *outlink = filter->outputs[i];
|
|
int best_idx = -1, best_score = INT_MIN;
|
|
|
|
if (outlink->type != AVMEDIA_TYPE_AUDIO ||
|
|
outlink->in_formats->format_count < 2)
|
|
continue;
|
|
|
|
for (j = 0; j < outlink->in_formats->format_count; j++) {
|
|
int out_format = outlink->in_formats->formats[j];
|
|
int out_bps = av_get_bytes_per_sample(out_format);
|
|
int score;
|
|
|
|
if (av_get_packed_sample_fmt(out_format) == format ||
|
|
av_get_planar_sample_fmt(out_format) == format) {
|
|
best_idx = j;
|
|
break;
|
|
}
|
|
|
|
/* for s32 and float prefer double to prevent loss of information */
|
|
if (bps == 4 && out_bps == 8) {
|
|
best_idx = j;
|
|
break;
|
|
}
|
|
|
|
/* prefer closest higher or equal bps */
|
|
score = -abs(out_bps - bps);
|
|
if (out_bps >= bps)
|
|
score += INT_MAX/2;
|
|
|
|
if (score > best_score) {
|
|
best_score = score;
|
|
best_idx = j;
|
|
}
|
|
}
|
|
av_assert0(best_idx >= 0);
|
|
FFSWAP(int, outlink->in_formats->formats[0],
|
|
outlink->in_formats->formats[best_idx]);
|
|
}
|
|
}
|
|
|
|
static void swap_sample_fmts(AVFilterGraph *graph)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < graph->nb_filters; i++)
|
|
swap_sample_fmts_on_filter(graph->filters[i]);
|
|
|
|
}
|
|
|
|
static int pick_formats(AVFilterGraph *graph)
|
|
{
|
|
int i, j, ret;
|
|
|
|
for (i = 0; i < graph->nb_filters; i++) {
|
|
AVFilterContext *filter = graph->filters[i];
|
|
|
|
for (j = 0; j < filter->nb_inputs; j++)
|
|
if ((ret = pick_format(filter->inputs[j])) < 0)
|
|
return ret;
|
|
for (j = 0; j < filter->nb_outputs; j++)
|
|
if ((ret = pick_format(filter->outputs[j])) < 0)
|
|
return ret;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Configure the formats of all the links in the graph.
|
|
*/
|
|
static int graph_config_formats(AVFilterGraph *graph, AVClass *log_ctx)
|
|
{
|
|
int ret;
|
|
|
|
/* find supported formats from sub-filters, and merge along links */
|
|
if ((ret = query_formats(graph, log_ctx)) < 0)
|
|
return ret;
|
|
|
|
/* Once everything is merged, it's possible that we'll still have
|
|
* multiple valid media format choices. We try to minimize the amount
|
|
* of format conversion inside filters */
|
|
reduce_formats(graph);
|
|
|
|
/* for audio filters, ensure the best format, sample rate and channel layout
|
|
* is selected */
|
|
swap_sample_fmts(graph);
|
|
swap_samplerates(graph);
|
|
swap_channel_layouts(graph);
|
|
|
|
if ((ret = pick_formats(graph)) < 0)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int graph_insert_fifos(AVFilterGraph *graph, AVClass *log_ctx)
|
|
{
|
|
AVFilterContext *f;
|
|
int i, j, ret;
|
|
int fifo_count = 0;
|
|
|
|
for (i = 0; i < graph->nb_filters; i++) {
|
|
f = graph->filters[i];
|
|
|
|
for (j = 0; j < f->nb_inputs; j++) {
|
|
AVFilterLink *link = f->inputs[j];
|
|
AVFilterContext *fifo_ctx;
|
|
AVFilter *fifo;
|
|
char name[32];
|
|
|
|
if (!link->dstpad->needs_fifo)
|
|
continue;
|
|
|
|
fifo = f->inputs[j]->type == AVMEDIA_TYPE_VIDEO ?
|
|
avfilter_get_by_name("fifo") :
|
|
avfilter_get_by_name("afifo");
|
|
|
|
snprintf(name, sizeof(name), "auto-inserted fifo %d", fifo_count++);
|
|
|
|
ret = avfilter_graph_create_filter(&fifo_ctx, fifo, name, NULL,
|
|
NULL, graph);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = avfilter_insert_filter(link, fifo_ctx, 0, 0);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int avfilter_graph_config(AVFilterGraph *graphctx, void *log_ctx)
|
|
{
|
|
int ret;
|
|
|
|
if ((ret = graph_check_validity(graphctx, log_ctx)))
|
|
return ret;
|
|
if ((ret = graph_insert_fifos(graphctx, log_ctx)) < 0)
|
|
return ret;
|
|
if ((ret = graph_config_formats(graphctx, log_ctx)))
|
|
return ret;
|
|
if ((ret = graph_config_links(graphctx, log_ctx)))
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|