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| author | David Robillard <d@drobilla.net> | 2013-02-18 03:05:55 +0000 |
|---|---|---|
| committer | David Robillard <d@drobilla.net> | 2013-02-18 03:05:55 +0000 |
| commit | f78962ae66a6e09bf372839665a150786fca8100 (patch) | |
| tree | e37a41ab136e10263a951d3ae901f50aeb7a3942 /plugins/eg03-metro.lv2/metro.c | |
| parent | e5ffd577fced7c2d55b0298af8eb6a4581de82a6 (diff) | |
| download | lv2-f78962ae66a6e09bf372839665a150786fca8100.tar.xz | |
Clean up sampler exampler for book format.
Diffstat (limited to 'plugins/eg03-metro.lv2/metro.c')
| -rw-r--r-- | plugins/eg03-metro.lv2/metro.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/plugins/eg03-metro.lv2/metro.c b/plugins/eg03-metro.lv2/metro.c index 925c1e7..51125af 100644 --- a/plugins/eg03-metro.lv2/metro.c +++ b/plugins/eg03-metro.lv2/metro.c @@ -119,6 +119,10 @@ connect_port(LV2_Handle instance, } } +/** + The activate() method resets the state completely, so the wave offset is + zero and the envelope is off. +*/ static void activate(LV2_Handle instance) { @@ -129,6 +133,12 @@ activate(LV2_Handle instance) self->state = STATE_OFF; } +/** + This plugin does a bit more work in instantiate() than the previous + examples. The tempo updates from the host contain several URIs, so those + are mapped, and the sine wave to be played needs to be generated based on + the current sample rate. +*/ static LV2_Handle instantiate(const LV2_Descriptor* descriptor, double rate, @@ -191,6 +201,10 @@ cleanup(LV2_Handle instance) free(instance); } +/** + Play back audio for the range [begin..end) relative to this cycle. This is + called by run() in-between events to output audio up until the current time. +*/ static void play(Metro* self, uint32_t begin, uint32_t end) { @@ -237,6 +251,10 @@ play(Metro* self, uint32_t begin, uint32_t end) } } +/** + Update the current position based on a host message. This is called by + run() when a time:Position is received. +*/ static void update_position(Metro* self, const LV2_Atom_Object* obj) { |