Pointer to a null-terminated string of the comment tag to look
cannam@86: for. Tags are compared case-insensitively.
cannam@86:
count
cannam@86:
The index of the comment string to retrieve. A value of 0 indicates
cannam@86: the first comment whose tag matches tag. Use
cannam@86: vorbis_comment_query_count
cannam@86: to determine the number of matching comments.
cannam@86:
cannam@86:
cannam@86:
cannam@86:
Return Values
cannam@86:
cannam@86:
A pointer to the comment string. The underlying buffer is owned by
cannam@86: the vorbis_comment structure.
cannam@86:
NULL on a nonexistent tag or if count is greater than or
cannam@86: equal to the number of matching comments.