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avio: add a function for iterating though protocol names.

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This commit is contained in:
Anton Khirnov 2011-04-04 08:18:54 +02:00
parent c234d40bd9
commit f8270bbf8c
2 changed files with 23 additions and 0 deletions
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10
libavformat/avio.c
View File

@ -57,6 +57,16 @@ URLProtocol *av_protocol_next(URLProtocol *p)
else return first_protocol;
}
const char *avio_enum_protocols(void **opaque, int output)
{
URLProtocol **p = opaque;
*p = *p ? (*p)->next : first_protocol;
if (!*p) return NULL;
if ((output && (*p)->url_write) || (!output && (*p)->url_read))
return (*p)->name;
return avio_enum_protocols(opaque, output);
}
int ffurl_register_protocol(URLProtocol *protocol, int size)
{
URLProtocol **p;

13
libavformat/avio.h
View File

@ -600,4 +600,17 @@ int avio_close_dyn_buf(AVIOContext *s, uint8_t **pbuffer);
int udp_get_file_handle(URLContext *h);
#endif
/**
* Iterate through names of available protocols.
*
* @param opaque A private pointer representing current protocol.
* It must be a pointer to NULL on first iteration and will
* be updated by successive calls to avio_enum_protocols.
* @param output If set to 1, iterate over output protocols,
* otherwise over input protocols.
*
* @return A static string containing the name of current protocol or NULL
*/
const char *avio_enum_protocols(void **opaque, int output);
#endif /* AVFORMAT_AVIO_H */