/*
* filter graphs
- * copyright (c) 2008 Vitor Sessak
- * copyright (c) 2007 Bobby Bingham
+ * Copyright (c) 2008 Vitor Sessak
+ * Copyright (c) 2007 Bobby Bingham
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "avfilter.h"
#include "avfiltergraph.h"
+#include "internal.h"
-void avfilter_destroy_graph(AVFilterGraph *graph)
+AVFilterGraph *avfilter_graph_alloc(void)
{
- for(; graph->filter_count > 0; graph->filter_count --)
- avfilter_destroy(graph->filters[graph->filter_count - 1]);
- av_freep(&graph->filters);
+ return av_mallocz(sizeof(AVFilterGraph));
}
-void avfilter_graph_add_filter(AVFilterGraph *graph, AVFilterContext *filter)
+void avfilter_graph_free(AVFilterGraph **graph)
{
- graph->filters = av_realloc(graph->filters,
- sizeof(AVFilterContext*) * ++graph->filter_count);
- graph->filters[graph->filter_count - 1] = filter;
+ if (!*graph)
+ return;
+ for (; (*graph)->filter_count > 0; (*graph)->filter_count--)
+ avfilter_free((*graph)->filters[(*graph)->filter_count - 1]);
+ av_freep(&(*graph)->scale_sws_opts);
+ av_freep(&(*graph)->filters);
+ av_freep(graph);
+}
+
+int avfilter_graph_add_filter(AVFilterGraph *graph, AVFilterContext *filter)
+{
+ AVFilterContext **filters = av_realloc(graph->filters,
+ sizeof(AVFilterContext*) * (graph->filter_count+1));
+ if (!filters)
+ return AVERROR(ENOMEM);
+
+ graph->filters = filters;
+ graph->filters[graph->filter_count++] = filter;
+
+ return 0;
+}
+
+int avfilter_graph_create_filter(AVFilterContext **filt_ctx, AVFilter *filt,
+ const char *name, const char *args, void *opaque,
+ AVFilterGraph *graph_ctx)
+{
+ int ret;
+
+ if ((ret = avfilter_open(filt_ctx, filt, name)) < 0)
+ goto fail;
+ if ((ret = avfilter_init_filter(*filt_ctx, args, opaque)) < 0)
+ goto fail;
+ if ((ret = avfilter_graph_add_filter(graph_ctx, *filt_ctx)) < 0)
+ goto fail;
+ return 0;
+
+fail:
+ if (*filt_ctx)
+ avfilter_free(*filt_ctx);
+ *filt_ctx = NULL;
+ return ret;
+}
+
+int ff_avfilter_graph_check_validity(AVFilterGraph *graph, AVClass *log_ctx)
+{
+ AVFilterContext *filt;
+ int i, j;
+
+ for (i = 0; i < graph->filter_count; i++) {
+ filt = graph->filters[i];
+
+ for (j = 0; j < filt->input_count; j++) {
+ if (!filt->inputs[j] || !filt->inputs[j]->src) {
+ av_log(log_ctx, AV_LOG_ERROR,
+ "Input pad \"%s\" for the filter \"%s\" of type \"%s\" not connected to any source\n",
+ filt->input_pads[j].name, filt->name, filt->filter->name);
+ return AVERROR(EINVAL);
+ }
+ }
+
+ for (j = 0; j < filt->output_count; j++) {
+ if (!filt->outputs[j] || !filt->outputs[j]->dst) {
+ av_log(log_ctx, AV_LOG_ERROR,
+ "Output pad \"%s\" for the filter \"%s\" of type \"%s\" not connected to any destination\n",
+ filt->output_pads[j].name, filt->name, filt->filter->name);
+ return AVERROR(EINVAL);
+ }
+ }
+ }
+
+ return 0;
+}
+
+int ff_avfilter_graph_config_links(AVFilterGraph *graph, AVClass *log_ctx)
+{
+ AVFilterContext *filt;
+ int i, ret;
+
+ for (i=0; i < graph->filter_count; i++) {
+ filt = graph->filters[i];
+
+ if (!filt->output_count) {
+ if ((ret = avfilter_config_links(filt)))
+ return ret;
+ }
+ }
+
+ return 0;
}
AVFilterContext *avfilter_graph_get_filter(AVFilterGraph *graph, char *name)
{
int i;
- if(!name)
- return NULL;
-
- for(i = 0; i < graph->filter_count; i ++)
- if(graph->filters[i]->name && !strcmp(name, graph->filters[i]->name))
+ for (i = 0; i < graph->filter_count; i++)
+ if (graph->filters[i]->name && !strcmp(name, graph->filters[i]->name))
return graph->filters[i];
return NULL;
}
-static int query_formats(AVFilterGraph *graph)
+static int query_formats(AVFilterGraph *graph, AVClass *log_ctx)
{
- int i, j;
+ int i, j, ret;
+ int scaler_count = 0;
+ char inst_name[30];
- /* ask all the sub-filters for their supported colorspaces */
- for(i = 0; i < graph->filter_count; i ++) {
- if(graph->filters[i]->filter->query_formats)
+ /* ask all the sub-filters for their supported media formats */
+ for (i = 0; i < graph->filter_count; i++) {
+ if (graph->filters[i]->filter->query_formats)
graph->filters[i]->filter->query_formats(graph->filters[i]);
else
avfilter_default_query_formats(graph->filters[i]);
}
/* go through and merge as many format lists as possible */
- for(i = 0; i < graph->filter_count; i ++) {
+ for (i = 0; i < graph->filter_count; i++) {
AVFilterContext *filter = graph->filters[i];
- for(j = 0; j < filter->input_count; j ++) {
- AVFilterLink *link;
- if(!(link = filter->inputs[j]))
- continue;
- if(link->in_formats != link->out_formats) {
- if(!avfilter_merge_formats(link->in_formats,
- link->out_formats)) {
- /* couldn't merge format lists. auto-insert scale filter */
+ for (j = 0; j < filter->input_count; j++) {
+ AVFilterLink *link = filter->inputs[j];
+ if (link && link->in_formats != link->out_formats) {
+ if (!avfilter_merge_formats(link->in_formats,
+ link->out_formats)) {
AVFilterContext *scale;
+ char scale_args[256];
+ /* couldn't merge format lists. auto-insert scale filter */
+ snprintf(inst_name, sizeof(inst_name), "auto-inserted scaler %d",
+ scaler_count++);
+ snprintf(scale_args, sizeof(scale_args), "0:0:%s", graph->scale_sws_opts);
+ if ((ret = avfilter_graph_create_filter(&scale, avfilter_get_by_name("scale"),
+ inst_name, scale_args, NULL, graph)) < 0)
+ return ret;
+ if ((ret = avfilter_insert_filter(link, scale, 0, 0)) < 0)
+ return ret;
- if(!(scale =
- avfilter_open(avfilter_get_by_name("scale"), NULL)))
- return -1;
- if(scale->filter->init(scale, NULL, NULL) ||
- avfilter_insert_filter(link, scale, 0, 0)) {
- avfilter_destroy(scale);
- return -1;
- }
-
- avfilter_graph_add_filter(graph, scale);
scale->filter->query_formats(scale);
- if(!avfilter_merge_formats(scale-> inputs[0]->in_formats,
- scale-> inputs[0]->out_formats) ||
- !avfilter_merge_formats(scale->outputs[0]->in_formats,
- scale->outputs[0]->out_formats))
- return -1;
+ if (((link = scale-> inputs[0]) &&
+ !avfilter_merge_formats(link->in_formats, link->out_formats)) ||
+ ((link = scale->outputs[0]) &&
+ !avfilter_merge_formats(link->in_formats, link->out_formats))) {
+ av_log(log_ctx, AV_LOG_ERROR,
+ "Impossible to convert between the formats supported by the filter "
+ "'%s' and the filter '%s'\n", link->src->name, link->dst->name);
+ return AVERROR(EINVAL);
+ }
}
}
}
static void pick_format(AVFilterLink *link)
{
- if(!link || !link->in_formats)
+ if (!link || !link->in_formats)
return;
link->in_formats->format_count = 1;
{
int i, j;
- for(i = 0; i < graph->filter_count; i ++) {
+ for (i = 0; i < graph->filter_count; i++) {
AVFilterContext *filter = graph->filters[i];
- for(j = 0; j < filter->input_count; j ++)
+ for (j = 0; j < filter->input_count; j++)
pick_format(filter->inputs[j]);
- for(j = 0; j < filter->output_count; j ++)
+ for (j = 0; j < filter->output_count; j++)
pick_format(filter->outputs[j]);
}
}
-int avfilter_graph_config_formats(AVFilterGraph *graph)
+int ff_avfilter_graph_config_formats(AVFilterGraph *graph, AVClass *log_ctx)
{
+ int ret;
+
/* find supported formats from sub-filters, and merge along links */
- if(query_formats(graph))
- return -1;
+ if ((ret = query_formats(graph, log_ctx)) < 0)
+ return ret;
/* Once everything is merged, it's possible that we'll still have
- * multiple valid colorspace choices. We pick the first one. */
+ * multiple valid media format choices. We pick the first one. */
pick_formats(graph);
return 0;
}
+int avfilter_graph_config(AVFilterGraph *graphctx, void *log_ctx)
+{
+ int ret;
+
+ if ((ret = ff_avfilter_graph_check_validity(graphctx, log_ctx)))
+ return ret;
+ if ((ret = ff_avfilter_graph_config_formats(graphctx, log_ctx)))
+ return ret;
+ if ((ret = ff_avfilter_graph_config_links(graphctx, log_ctx)))
+ return ret;
+
+ return 0;
+}
projects / ffmpeg / blobdiff