1063 lines
37 KiB
C
1063 lines
37 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 FFmpeg.
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*
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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 <ctype.h>
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#include <string.h>
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#include "libavutil/audioconvert.h"
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#include "libavutil/avassert.h"
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#include "libavutil/pixdesc.h"
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#include "libavcodec/avcodec.h" // avcodec_find_best_pix_fmt_of_2()
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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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#include "libavutil/audioconvert.h"
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#include "libavutil/avassert.h"
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#include "libavutil/common.h"
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#include "libavutil/log.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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.category = AV_CLASS_CATEGORY_FILTER,
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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(AVFilterGraph));
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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)->filter_count > 0; (*graph)->filter_count--)
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avfilter_free((*graph)->filters[(*graph)->filter_count - 1]);
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av_freep(&(*graph)->sink_links);
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av_freep(&(*graph)->scale_sws_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(AVFilterContext*) * (graph->filter_count+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->filter_count++] = filter;
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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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void avfilter_graph_set_auto_convert(AVFilterGraph *graph, unsigned flags)
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{
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graph->disable_auto_convert = flags;
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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->filter_count; 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->filter_count; 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->filter_count; 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 filter_query_formats(AVFilterContext *ctx)
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{
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int ret;
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AVFilterFormats *formats;
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AVFilterChannelLayouts *chlayouts;
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AVFilterFormats *samplerates;
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enum AVMediaType type = ctx->inputs && ctx->inputs [0] ? ctx->inputs [0]->type :
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ctx->outputs && ctx->outputs[0] ? ctx->outputs[0]->type :
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AVMEDIA_TYPE_VIDEO;
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if ((ret = ctx->filter->query_formats(ctx)) < 0)
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return ret;
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formats = ff_all_formats(type);
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if (!formats)
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return AVERROR(ENOMEM);
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ff_set_common_formats(ctx, formats);
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if (type == AVMEDIA_TYPE_AUDIO) {
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samplerates = ff_all_samplerates();
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if (!samplerates)
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return AVERROR(ENOMEM);
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ff_set_common_samplerates(ctx, samplerates);
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chlayouts = ff_all_channel_layouts();
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if (!chlayouts)
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return AVERROR(ENOMEM);
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ff_set_common_channel_layouts(ctx, chlayouts);
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}
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return 0;
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}
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static int insert_conv_filter(AVFilterGraph *graph, AVFilterLink *link,
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const char *filt_name, const char *filt_args)
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{
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static int auto_count = 0, ret;
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char inst_name[32];
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AVFilterContext *filt_ctx;
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if (graph->disable_auto_convert) {
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av_log(NULL, AV_LOG_ERROR,
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"The filters '%s' and '%s' do not have a common format "
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"and automatic conversion is disabled.\n",
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link->src->name, link->dst->name);
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return AVERROR(EINVAL);
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}
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snprintf(inst_name, sizeof(inst_name), "auto-inserted %s %d",
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filt_name, auto_count++);
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if ((ret = avfilter_graph_create_filter(&filt_ctx,
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avfilter_get_by_name(filt_name),
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inst_name, filt_args, NULL, graph)) < 0)
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return ret;
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if ((ret = avfilter_insert_filter(link, filt_ctx, 0, 0)) < 0)
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return ret;
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filter_query_formats(filt_ctx);
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if ( ((link = filt_ctx-> inputs[0]) &&
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!ff_merge_formats(link->in_formats, link->out_formats)) ||
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((link = filt_ctx->outputs[0]) &&
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!ff_merge_formats(link->in_formats, link->out_formats))
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) {
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av_log(NULL, 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 AVERROR(EINVAL);
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}
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if (link->type == AVMEDIA_TYPE_AUDIO &&
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(((link = filt_ctx-> inputs[0]) &&
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!ff_merge_channel_layouts(link->in_channel_layouts, link->out_channel_layouts)) ||
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((link = filt_ctx->outputs[0]) &&
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!ff_merge_channel_layouts(link->in_channel_layouts, link->out_channel_layouts)))
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) {
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av_log(NULL, AV_LOG_ERROR,
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"Impossible to convert between the channel layouts 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 AVERROR(EINVAL);
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}
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return 0;
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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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char filt_args[128];
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AVFilterFormats *formats;
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AVFilterChannelLayouts *chlayouts;
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AVFilterFormats *samplerates;
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int scaler_count = 0, resampler_count = 0;
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for (j = 0; j < 2; j++) {
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/* ask all the sub-filters for their supported media formats */
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for (i = 0; i < graph->filter_count; i++) {
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/* Call query_formats on sources first.
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This is a temporary workaround for amerge,
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until format renegociation is implemented. */
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if (!graph->filters[i]->nb_inputs == j)
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continue;
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if (graph->filters[i]->filter->query_formats)
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ret = filter_query_formats(graph->filters[i]);
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else
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ret = ff_default_query_formats(graph->filters[i]);
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if (ret < 0)
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return ret;
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}
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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->filter_count; 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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#if 0
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if (!link) continue;
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if (!link->in_formats || !link->out_formats)
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return AVERROR(EINVAL);
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if (link->type == AVMEDIA_TYPE_VIDEO &&
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!ff_merge_formats(link->in_formats, link->out_formats)) {
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/* couldn't merge format lists, auto-insert scale filter */
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snprintf(filt_args, sizeof(filt_args), "0:0:%s",
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graph->scale_sws_opts);
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if (ret = insert_conv_filter(graph, link, "scale", filt_args))
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return ret;
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}
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else if (link->type == AVMEDIA_TYPE_AUDIO) {
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if (!link->in_channel_layouts || !link->out_channel_layouts)
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return AVERROR(EINVAL);
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/* Merge all three list before checking: that way, in all
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* three categories, aconvert will use a common format
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* whenever possible. */
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formats = ff_merge_formats(link->in_formats, link->out_formats);
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chlayouts = ff_merge_channel_layouts(link->in_channel_layouts , link->out_channel_layouts);
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samplerates = ff_merge_samplerates (link->in_samplerates, link->out_samplerates);
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if (!formats || !chlayouts || !samplerates)
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if (ret = insert_conv_filter(graph, link, "aresample", NULL))
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return ret;
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#else
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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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snprintf(scale_args, sizeof(scale_args), "0:0:%s", graph->scale_sws_opts);
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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("aresample"))) {
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av_log(log_ctx, AV_LOG_ERROR, "'aresample' 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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if ((ret = avfilter_graph_create_filter(&convert, filter,
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inst_name, NULL, 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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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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#endif
|
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}
|
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}
|
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}
|
|
|
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return 0;
|
|
}
|
|
|
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static int pick_format(AVFilterLink *link, AVFilterLink *ref)
|
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{
|
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if (!link || !link->in_formats)
|
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return 0;
|
|
|
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if (link->type == AVMEDIA_TYPE_VIDEO) {
|
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if(ref && ref->type == AVMEDIA_TYPE_VIDEO){
|
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int has_alpha= av_pix_fmt_desc_get(ref->format)->nb_components % 2 == 0;
|
|
enum AVPixelFormat best= AV_PIX_FMT_NONE;
|
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int i;
|
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for (i=0; i<link->in_formats->format_count; i++) {
|
|
enum AVPixelFormat p = link->in_formats->formats[i];
|
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best= avcodec_find_best_pix_fmt_of_2(best, p, ref->format, has_alpha, NULL);
|
|
}
|
|
av_log(link->src,AV_LOG_DEBUG, "picking %s out of %d ref:%s alpha:%d\n",
|
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av_get_pix_fmt_name(best), link->in_formats->format_count,
|
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av_get_pix_fmt_name(ref->format), has_alpha);
|
|
link->in_formats->formats[0] = best;
|
|
}
|
|
}
|
|
|
|
link->in_formats->format_count = 1;
|
|
link->format = link->in_formats->formats[0];
|
|
|
|
if (link->type == AVMEDIA_TYPE_AUDIO) {
|
|
if (!link->in_samplerates->format_count) {
|
|
av_log(link->src, AV_LOG_ERROR, "Cannot select sample rate for"
|
|
" the link between filters %s and %s.\n", link->src->name,
|
|
link->dst->name);
|
|
return AVERROR(EINVAL);
|
|
}
|
|
link->in_samplerates->format_count = 1;
|
|
link->sample_rate = link->in_samplerates->formats[0];
|
|
|
|
if (!link->in_channel_layouts->nb_channel_layouts) {
|
|
av_log(link->src, AV_LOG_ERROR, "Cannot select channel layout for"
|
|
"the link between filters %s and %s.\n", link->src->name,
|
|
link->dst->name);
|
|
return AVERROR(EINVAL);
|
|
}
|
|
link->in_channel_layouts->nb_channel_layouts = 1;
|
|
link->channel_layout = link->in_channel_layouts->channel_layouts[0];
|
|
}
|
|
|
|
ff_formats_unref(&link->in_formats);
|
|
ff_formats_unref(&link->out_formats);
|
|
ff_formats_unref(&link->in_samplerates);
|
|
ff_formats_unref(&link->out_samplerates);
|
|
ff_channel_layouts_unref(&link->in_channel_layouts);
|
|
ff_channel_layouts_unref(&link->out_channel_layouts);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define REDUCE_FORMATS(fmt_type, list_type, list, var, nb, add_format) \
|
|
do { \
|
|
for (i = 0; i < filter->nb_inputs; i++) { \
|
|
AVFilterLink *link = filter->inputs[i]; \
|
|
fmt_type fmt; \
|
|
\
|
|
if (!link->out_ ## list || link->out_ ## list->nb != 1) \
|
|
continue; \
|
|
fmt = link->out_ ## list->var[0]; \
|
|
\
|
|
for (j = 0; j < filter->nb_outputs; j++) { \
|
|
AVFilterLink *out_link = filter->outputs[j]; \
|
|
list_type *fmts; \
|
|
\
|
|
if (link->type != out_link->type || \
|
|
out_link->in_ ## list->nb == 1) \
|
|
continue; \
|
|
fmts = out_link->in_ ## list; \
|
|
\
|
|
if (!out_link->in_ ## list->nb) { \
|
|
add_format(&out_link->in_ ##list, fmt); \
|
|
break; \
|
|
} \
|
|
\
|
|
for (k = 0; k < out_link->in_ ## list->nb; k++) \
|
|
if (fmts->var[k] == fmt) { \
|
|
fmts->var[0] = fmt; \
|
|
fmts->nb = 1; \
|
|
ret = 1; \
|
|
break; \
|
|
} \
|
|
} \
|
|
} \
|
|
} while (0)
|
|
|
|
static int reduce_formats_on_filter(AVFilterContext *filter)
|
|
{
|
|
int i, j, k, ret = 0;
|
|
|
|
REDUCE_FORMATS(int, AVFilterFormats, formats, formats,
|
|
format_count, ff_add_format);
|
|
REDUCE_FORMATS(int, AVFilterFormats, samplerates, formats,
|
|
format_count, ff_add_format);
|
|
REDUCE_FORMATS(uint64_t, AVFilterChannelLayouts, channel_layouts,
|
|
channel_layouts, nb_channel_layouts, ff_add_channel_layout);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void reduce_formats(AVFilterGraph *graph)
|
|
{
|
|
int i, reduced;
|
|
|
|
do {
|
|
reduced = 0;
|
|
|
|
for (i = 0; i < graph->filter_count; i++)
|
|
reduced |= reduce_formats_on_filter(graph->filters[i]);
|
|
} while (reduced);
|
|
}
|
|
|
|
static void swap_samplerates_on_filter(AVFilterContext *filter)
|
|
{
|
|
AVFilterLink *link = NULL;
|
|
int sample_rate;
|
|
int i, j;
|
|
|
|
for (i = 0; i < filter->nb_inputs; i++) {
|
|
link = filter->inputs[i];
|
|
|
|
if (link->type == AVMEDIA_TYPE_AUDIO &&
|
|
link->out_samplerates->format_count == 1)
|
|
break;
|
|
}
|
|
if (i == filter->nb_inputs)
|
|
return;
|
|
|
|
sample_rate = link->out_samplerates->formats[0];
|
|
|
|
for (i = 0; i < filter->nb_outputs; i++) {
|
|
AVFilterLink *outlink = filter->outputs[i];
|
|
int best_idx, best_diff = INT_MAX;
|
|
|
|
if (outlink->type != AVMEDIA_TYPE_AUDIO ||
|
|
outlink->in_samplerates->format_count < 2)
|
|
continue;
|
|
|
|
for (j = 0; j < outlink->in_samplerates->format_count; j++) {
|
|
int diff = abs(sample_rate - outlink->in_samplerates->formats[j]);
|
|
|
|
if (diff < best_diff) {
|
|
best_diff = diff;
|
|
best_idx = j;
|
|
}
|
|
}
|
|
FFSWAP(int, outlink->in_samplerates->formats[0],
|
|
outlink->in_samplerates->formats[best_idx]);
|
|
}
|
|
}
|
|
|
|
static void swap_samplerates(AVFilterGraph *graph)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < graph->filter_count; i++)
|
|
swap_samplerates_on_filter(graph->filters[i]);
|
|
}
|
|
|
|
#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)
|
|
#define CH_WIDE_PAIR (AV_CH_WIDE_LEFT | AV_CH_WIDE_RIGHT)
|
|
#define CH_SIDE_PAIR (AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT)
|
|
#define CH_DIRECT_PAIR (AV_CH_SURROUND_DIRECT_LEFT | AV_CH_SURROUND_DIRECT_RIGHT)
|
|
#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] = {
|
|
{ CH_FRONT_PAIR, CH_CENTER_PAIR },
|
|
{ CH_FRONT_PAIR, CH_WIDE_PAIR },
|
|
{ CH_FRONT_PAIR, AV_CH_FRONT_CENTER },
|
|
{ CH_CENTER_PAIR, CH_FRONT_PAIR },
|
|
{ CH_CENTER_PAIR, CH_WIDE_PAIR },
|
|
{ CH_CENTER_PAIR, AV_CH_FRONT_CENTER },
|
|
{ CH_WIDE_PAIR, CH_FRONT_PAIR },
|
|
{ CH_WIDE_PAIR, CH_CENTER_PAIR },
|
|
{ CH_WIDE_PAIR, AV_CH_FRONT_CENTER },
|
|
{ AV_CH_FRONT_CENTER, CH_FRONT_PAIR },
|
|
{ AV_CH_FRONT_CENTER, CH_CENTER_PAIR },
|
|
{ AV_CH_FRONT_CENTER, CH_WIDE_PAIR },
|
|
{ CH_SIDE_PAIR, CH_DIRECT_PAIR },
|
|
{ CH_SIDE_PAIR, CH_BACK_PAIR },
|
|
{ CH_SIDE_PAIR, AV_CH_BACK_CENTER },
|
|
{ CH_BACK_PAIR, CH_DIRECT_PAIR },
|
|
{ CH_BACK_PAIR, CH_SIDE_PAIR },
|
|
{ CH_BACK_PAIR, AV_CH_BACK_CENTER },
|
|
{ AV_CH_BACK_CENTER, CH_BACK_PAIR },
|
|
{ AV_CH_BACK_CENTER, CH_DIRECT_PAIR },
|
|
{ AV_CH_BACK_CENTER, CH_SIDE_PAIR },
|
|
};
|
|
|
|
static void swap_channel_layouts_on_filter(AVFilterContext *filter)
|
|
{
|
|
AVFilterLink *link = NULL;
|
|
int i, j, k;
|
|
|
|
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->filter_count; 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->filter_count; i++)
|
|
swap_sample_fmts_on_filter(graph->filters[i]);
|
|
|
|
}
|
|
|
|
static int pick_formats(AVFilterGraph *graph)
|
|
{
|
|
int i, j, ret;
|
|
int change;
|
|
|
|
do{
|
|
change = 0;
|
|
for (i = 0; i < graph->filter_count; i++) {
|
|
AVFilterContext *filter = graph->filters[i];
|
|
if (filter->nb_inputs){
|
|
for (j = 0; j < filter->nb_inputs; j++){
|
|
if(filter->inputs[j]->in_formats && filter->inputs[j]->in_formats->format_count == 1) {
|
|
pick_format(filter->inputs[j], NULL);
|
|
change = 1;
|
|
}
|
|
}
|
|
}
|
|
if (filter->nb_outputs){
|
|
for (j = 0; j < filter->nb_outputs; j++){
|
|
if(filter->outputs[j]->in_formats && filter->outputs[j]->in_formats->format_count == 1) {
|
|
pick_format(filter->outputs[j], NULL);
|
|
change = 1;
|
|
}
|
|
}
|
|
}
|
|
if (filter->nb_inputs && filter->nb_outputs && filter->inputs[0]->format>=0) {
|
|
for (j = 0; j < filter->nb_outputs; j++) {
|
|
if(filter->outputs[j]->format<0) {
|
|
pick_format(filter->outputs[j], filter->inputs[0]);
|
|
change = 1;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}while(change);
|
|
|
|
for (i = 0; i < graph->filter_count; i++) {
|
|
AVFilterContext *filter = graph->filters[i];
|
|
|
|
for (j = 0; j < filter->nb_inputs; j++)
|
|
if ((ret = pick_format(filter->inputs[j], NULL)) < 0)
|
|
return ret;
|
|
for (j = 0; j < filter->nb_outputs; j++)
|
|
if ((ret = pick_format(filter->outputs[j], NULL)) < 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 ff_avfilter_graph_config_pointers(AVFilterGraph *graph,
|
|
AVClass *log_ctx)
|
|
{
|
|
unsigned i, j;
|
|
int sink_links_count = 0, n = 0;
|
|
AVFilterContext *f;
|
|
AVFilterLink **sinks;
|
|
|
|
for (i = 0; i < graph->filter_count; i++) {
|
|
f = graph->filters[i];
|
|
for (j = 0; j < f->nb_inputs; j++) {
|
|
f->inputs[j]->graph = graph;
|
|
f->inputs[j]->age_index = -1;
|
|
}
|
|
for (j = 0; j < f->nb_outputs; j++) {
|
|
f->outputs[j]->graph = graph;
|
|
f->outputs[j]->age_index= -1;
|
|
}
|
|
if (!f->nb_outputs) {
|
|
if (f->nb_inputs > INT_MAX - sink_links_count)
|
|
return AVERROR(EINVAL);
|
|
sink_links_count += f->nb_inputs;
|
|
}
|
|
}
|
|
sinks = av_calloc(sink_links_count, sizeof(*sinks));
|
|
if (!sinks)
|
|
return AVERROR(ENOMEM);
|
|
for (i = 0; i < graph->filter_count; i++) {
|
|
f = graph->filters[i];
|
|
if (!f->nb_outputs) {
|
|
for (j = 0; j < f->nb_inputs; j++) {
|
|
sinks[n] = f->inputs[j];
|
|
f->inputs[j]->age_index = n++;
|
|
}
|
|
}
|
|
}
|
|
av_assert0(n == sink_links_count);
|
|
graph->sink_links = sinks;
|
|
graph->sink_links_count = sink_links_count;
|
|
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->filter_count; 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;
|
|
if ((ret = ff_avfilter_graph_config_pointers(graphctx, log_ctx)))
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int avfilter_graph_send_command(AVFilterGraph *graph, const char *target, const char *cmd, const char *arg, char *res, int res_len, int flags)
|
|
{
|
|
int i, r = AVERROR(ENOSYS);
|
|
|
|
if(!graph)
|
|
return r;
|
|
|
|
if((flags & AVFILTER_CMD_FLAG_ONE) && !(flags & AVFILTER_CMD_FLAG_FAST)) {
|
|
r=avfilter_graph_send_command(graph, target, cmd, arg, res, res_len, flags | AVFILTER_CMD_FLAG_FAST);
|
|
if(r != AVERROR(ENOSYS))
|
|
return r;
|
|
}
|
|
|
|
if(res_len && res)
|
|
res[0]= 0;
|
|
|
|
for (i = 0; i < graph->filter_count; i++) {
|
|
AVFilterContext *filter = graph->filters[i];
|
|
if(!strcmp(target, "all") || (filter->name && !strcmp(target, filter->name)) || !strcmp(target, filter->filter->name)){
|
|
r = avfilter_process_command(filter, cmd, arg, res, res_len, flags);
|
|
if(r != AVERROR(ENOSYS)) {
|
|
if((flags & AVFILTER_CMD_FLAG_ONE) || r<0)
|
|
return r;
|
|
}
|
|
}
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
int avfilter_graph_queue_command(AVFilterGraph *graph, const char *target, const char *command, const char *arg, int flags, double ts)
|
|
{
|
|
int i;
|
|
|
|
if(!graph)
|
|
return 0;
|
|
|
|
for (i = 0; i < graph->filter_count; i++) {
|
|
AVFilterContext *filter = graph->filters[i];
|
|
if(filter && (!strcmp(target, "all") || !strcmp(target, filter->name) || !strcmp(target, filter->filter->name))){
|
|
AVFilterCommand **que = &filter->command_queue, *next;
|
|
while(*que && (*que)->time <= ts)
|
|
que = &(*que)->next;
|
|
next= *que;
|
|
*que= av_mallocz(sizeof(AVFilterCommand));
|
|
(*que)->command = av_strdup(command);
|
|
(*que)->arg = av_strdup(arg);
|
|
(*que)->time = ts;
|
|
(*que)->flags = flags;
|
|
(*que)->next = next;
|
|
if(flags & AVFILTER_CMD_FLAG_ONE)
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void heap_bubble_up(AVFilterGraph *graph,
|
|
AVFilterLink *link, int index)
|
|
{
|
|
AVFilterLink **links = graph->sink_links;
|
|
|
|
while (index) {
|
|
int parent = (index - 1) >> 1;
|
|
if (links[parent]->current_pts >= link->current_pts)
|
|
break;
|
|
links[index] = links[parent];
|
|
links[index]->age_index = index;
|
|
index = parent;
|
|
}
|
|
links[index] = link;
|
|
link->age_index = index;
|
|
}
|
|
|
|
static void heap_bubble_down(AVFilterGraph *graph,
|
|
AVFilterLink *link, int index)
|
|
{
|
|
AVFilterLink **links = graph->sink_links;
|
|
|
|
while (1) {
|
|
int child = 2 * index + 1;
|
|
if (child >= graph->sink_links_count)
|
|
break;
|
|
if (child + 1 < graph->sink_links_count &&
|
|
links[child + 1]->current_pts < links[child]->current_pts)
|
|
child++;
|
|
if (link->current_pts < links[child]->current_pts)
|
|
break;
|
|
links[index] = links[child];
|
|
links[index]->age_index = index;
|
|
index = child;
|
|
}
|
|
links[index] = link;
|
|
link->age_index = index;
|
|
}
|
|
|
|
void ff_avfilter_graph_update_heap(AVFilterGraph *graph, AVFilterLink *link)
|
|
{
|
|
heap_bubble_up (graph, link, link->age_index);
|
|
heap_bubble_down(graph, link, link->age_index);
|
|
}
|
|
|
|
|
|
int avfilter_graph_request_oldest(AVFilterGraph *graph)
|
|
{
|
|
while (graph->sink_links_count) {
|
|
AVFilterLink *oldest = graph->sink_links[0];
|
|
int r = ff_request_frame(oldest);
|
|
if (r != AVERROR_EOF)
|
|
return r;
|
|
av_log(oldest->dst, AV_LOG_DEBUG, "EOF on sink link %s:%s.\n",
|
|
oldest->dst ? oldest->dst->name : "unknown",
|
|
oldest->dstpad ? oldest->dstpad->name : "unknown");
|
|
/* EOF: remove the link from the heap */
|
|
if (oldest->age_index < --graph->sink_links_count)
|
|
heap_bubble_down(graph, graph->sink_links[graph->sink_links_count],
|
|
oldest->age_index);
|
|
oldest->age_index = -1;
|
|
}
|
|
return AVERROR_EOF;
|
|
}
|