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| -rw-r--r-- | core.lv2/ChangeLog | 1 | ||||
| -rw-r--r-- | core.lv2/lv2.h | 7 |
2 files changed, 8 insertions, 0 deletions
diff --git a/core.lv2/ChangeLog b/core.lv2/ChangeLog index 507a791..1a4e8a8 100644 --- a/core.lv2/ChangeLog +++ b/core.lv2/ChangeLog @@ -11,6 +11,7 @@ lv2core (UNRELEASED) unstable; urgency=low * More precisely define properties with OWL * Move project metadata to manifest * Add lv2:enumeration port property. + * Define run() pre-roll special case (sample_count == 0). -- David Robillard <d@drobilla.net> UNRELEASED diff --git a/core.lv2/lv2.h b/core.lv2/lv2.h index 7706ef1..189cbd3 100644 --- a/core.lv2/lv2.h +++ b/core.lv2/lv2.h @@ -198,6 +198,13 @@ typedef struct _LV2_Descriptor { things that the plugin MUST NOT do within the run() function (see lv2.ttl for details). + As a special case, when @a sample_count == 0, the plugin should update + any output ports that represent a single instant in time (e.g. control + ports, but not audio ports). This is particularly useful for latent + plugins, which should update their latency output port so hosts can + pre-roll plugins to compute latency. Plugins MUST NOT crash when + @a sample_count == 0. + @param instance Instance to be run. @param sample_count The block size (in samples) for which the plugin |