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lavf/protocols: avoid discarding const in avio_enum_protocols() 

Instead of storing the protocol pointer in the opaque iteration state,
store just the index of the next protocol, similarly to how
ff_urlcontext_child_class_iterate() works.
This commit is contained in:
Anton Khirnov 2021-11-25 15:40:16 +01:00
parent c0e46ad9a9
commit 6ebaccf327
1 changed files with 9 additions and 9 deletions
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18
libavformat/protocols.c
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@ -93,17 +93,17 @@ const AVClass *ff_urlcontext_child_class_iterate(void **iter)
const char *avio_enum_protocols(void **opaque, int output)
{
const URLProtocol **p = *opaque;
uintptr_t i;
p = p ? p + 1 : url_protocols;
*opaque = p;
if (!*p) {
*opaque = NULL;
return NULL;
for (i = (uintptr_t)*opaque; url_protocols[i]; i++) {
const URLProtocol *p = url_protocols[i];
if ((output && p->url_write) || (!output && p->url_read)) {
*opaque = (void*)(uintptr_t)(i + 1);
return p->name;
}
}
if ((output && (*p)->url_write) || (!output && (*p)->url_read))
return (*p)->name;
return avio_enum_protocols(opaque, output);
*opaque = NULL;
return NULL;
}
const AVClass *avio_protocol_get_class(const char *name)