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Add AV_HASH_MAX_SIZE.

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Makes it easier to use static allocation for the result buffer.

Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>
This commit is contained in:
Reimar Döffinger 2013-05-14 22:15:45 +02:00
parent dccaad3bcd
commit 4c2b3f4738
1 changed files with 12 additions and 0 deletions
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12
libavutil/hash.h
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@ -48,6 +48,18 @@ const char *av_hash_names(int i);
*/
const char *av_hash_get_name(const struct AVHashContext *ctx);
/**
* Maximum value that av_hash_get_size will currently return.
*
* You can use this if you absolutely want or need to use static allocation
* and are fine with not supporting hashes newly added to libavutil without
* recompilation.
* Note that you still need to check against av_hash_get_size, adding new hashes
* with larger sizes will not be considered an ABI change and should not cause
* your code to overflow a buffer.
*/
#define AV_HASH_MAX_SIZE 32
/**
* Get the size of the resulting hash value in bytes.
*