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lavfi: check links properties after configuring them.

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For now, check the image size.
Inspired by a patch from Paul B Mahol.

Invalid sizes would be detected later by allocation failures,
detecting problems earlier is cleaner.
This commit is contained in:
Nicolas George 2017-11-01 21:15:00 +01:00
parent 5ab41a25ba
commit 345e7072ab
1 changed files with 24 additions and 0 deletions
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24
libavfilter/avfiltergraph.c
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@ -28,6 +28,7 @@
#include "libavutil/avstring.h"
#include "libavutil/bprint.h"
#include "libavutil/channel_layout.h"
#include "libavutil/imgutils.h"
#include "libavutil/internal.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
@ -263,6 +264,27 @@ static int graph_config_links(AVFilterGraph *graph, AVClass *log_ctx)
return 0;
}
static int graph_check_links(AVFilterGraph *graph, AVClass *log_ctx)
{
AVFilterContext *f;
AVFilterLink *l;
unsigned i, j;
int ret;
for (i = 0; i < graph->nb_filters; i++) {
f = graph->filters[i];
for (j = 0; j < f->nb_outputs; j++) {
l = f->outputs[j];
if (l->type == AVMEDIA_TYPE_VIDEO) {
ret = av_image_check_size2(l->w, l->h, INT64_MAX, l->format, 0, f);
if (ret < 0)
return ret;
}
}
}
return 0;
}
AVFilterContext *avfilter_graph_get_filter(AVFilterGraph *graph, const char *name)
{
int i;
@ -1256,6 +1278,8 @@ int avfilter_graph_config(AVFilterGraph *graphctx, void *log_ctx)
return ret;
if ((ret = graph_config_links(graphctx, log_ctx)))
return ret;
if ((ret = graph_check_links(graphctx, log_ctx)))
return ret;
if ((ret = graph_config_pointers(graphctx, log_ctx)))
return ret;