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| author | Max Kellermann <max@duempel.org> | 2012-08-15 21:32:34 +0200 |
|---|---|---|
| committer | Max Kellermann <max@duempel.org> | 2012-08-15 23:02:27 +0200 |
| commit | a6ac0f89656b9ef374703d24bbb27316a705eadc (patch) | |
| tree | 3706b1b8474ae06890595a8e20c8be011f6a162b /src/DatabasePlugin.hxx | |
| parent | 4e1eb03287c1af889372ed4c63220a88d2032f78 (diff) | |
| download | mpd-a6ac0f89656b9ef374703d24bbb27316a705eadc.tar.gz mpd-a6ac0f89656b9ef374703d24bbb27316a705eadc.tar.xz mpd-a6ac0f89656b9ef374703d24bbb27316a705eadc.zip | |
DatabasePlugin: add method VisitUniqueTags()
Optimize the ProxyDatabase by invoking "list" on the peer, instead of
visiting all songs.
Diffstat (limited to '')
| -rw-r--r-- | src/DatabasePlugin.hxx | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/src/DatabasePlugin.hxx b/src/DatabasePlugin.hxx index 31b2a1024..a6168b628 100644 --- a/src/DatabasePlugin.hxx +++ b/src/DatabasePlugin.hxx @@ -29,6 +29,10 @@ #include "DatabaseVisitor.hxx" #include "gcc.h" +extern "C" { +#include "tag.h" +} + struct config_param; struct DatabaseSelection; struct db_visitor; @@ -82,6 +86,14 @@ public: GError **error_r) const { return Visit(selection, VisitDirectory(), visit_song, error_r); } + + /** + * Visit all unique tag values. + */ + virtual bool VisitUniqueTags(const DatabaseSelection &selection, + enum tag_type tag_type, + VisitString visit_string, + GError **error_r) const = 0; }; struct DatabasePlugin { |