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lavfi/avfilter: export AVFilter initialization state 

This will allow the AVOption code to detect setting non-runtime options
after the filter has been initialized.
This commit is contained in:
Anton Khirnov 2024-09-28 16:19:06 +02:00
parent 0548ab2e42
commit 262e6f8430
3 changed files with 9 additions and 7 deletions
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8
libavfilter/avfilter.c
View File

@ -159,7 +159,8 @@ int avfilter_link(AVFilterContext *src, unsigned srcpad,
src->outputs[srcpad] || dst->inputs[dstpad])
return AVERROR(EINVAL);
if (!fffilterctx(src)->initialized || !fffilterctx(dst)->initialized) {
if (!(fffilterctx(src)->state_flags & AV_CLASS_STATE_INITIALIZED) ||
!(fffilterctx(dst)->state_flags & AV_CLASS_STATE_INITIALIZED)) {
av_log(src, AV_LOG_ERROR, "Filters must be initialized before linking.\n");
return AVERROR(EINVAL);
}
@ -676,6 +677,7 @@ static const AVClass avfilter_class = {
.child_next = filter_child_next,
.child_class_iterate = filter_child_class_iterate,
.option = avfilter_options,
.state_flags_offset = offsetof(FFFilterContext, state_flags),
};
static int default_execute(AVFilterContext *ctx, avfilter_action_func *func, void *arg,
@ -909,7 +911,7 @@ int avfilter_init_dict(AVFilterContext *ctx, AVDictionary **options)
FFFilterContext *ctxi = fffilterctx(ctx);
int ret = 0;
if (ctxi->initialized) {
if (ctxi->state_flags & AV_CLASS_STATE_INITIALIZED) {
av_log(ctx, AV_LOG_ERROR, "Filter already initialized\n");
return AVERROR(EINVAL);
}
@ -940,7 +942,7 @@ int avfilter_init_dict(AVFilterContext *ctx, AVDictionary **options)
return ret;
}
ctxi->initialized = 1;
ctxi->state_flags |= AV_CLASS_STATE_INITIALIZED;
return 0;
}

5
libavfilter/avfilter_internal.h
View File

@ -100,9 +100,8 @@ typedef struct FFFilterContext {
avfilter_execute_func *execute;
// 1 when avfilter_init_*() was successfully called on this filter
// 0 otherwise
int initialized;
// AV_CLASS_STATE_FLAG_*
unsigned state_flags;
} FFFilterContext;
static inline FFFilterContext *fffilterctx(AVFilterContext *ctx)

3
libavfilter/graphparser.c
View File

@ -627,7 +627,8 @@ int avfilter_graph_segment_init(AVFilterGraphSegment *seg, int flags)
if (p->filter_name)
return fail_creation_pending(seg, p->filter_name, __func__);
if (!p->filter || fffilterctx(p->filter)->initialized)
if (!p->filter ||
(fffilterctx(p->filter)->state_flags & AV_CLASS_STATE_INITIALIZED))
continue;
ret = avfilter_init_dict(p->filter, NULL);