diff options
Diffstat (limited to 'libs/ardour/lv2_plugin.cc')
| -rw-r--r-- | libs/ardour/lv2_plugin.cc | 24 |
1 files changed, 19 insertions, 5 deletions
diff --git a/libs/ardour/lv2_plugin.cc b/libs/ardour/lv2_plugin.cc index bfa593aea3..219271a7e1 100644 --- a/libs/ardour/lv2_plugin.cc +++ b/libs/ardour/lv2_plugin.cc @@ -1137,8 +1137,20 @@ LV2Plugin::write_from_ui(uint32_t index, const uint8_t* body) { if (!_from_ui) { - _from_ui = new RingBuffer<uint8_t>( - _session.engine().raw_buffer_size(DataType::MIDI) * NBUFS); + size_t rbs = _session.engine().raw_buffer_size(DataType::MIDI) * NBUFS; + /* buffer data communication from plugin UI to plugin instance. + * this buffer needs to potentially hold + * (port's minimumSize) * (audio-periods) / (UI-periods) + * bytes. + * + * e.g 48kSPS / 128fpp -> audio-periods = 375 Hz + * ui-periods = 25 Hz (SuperRapidScreenUpdate) + * default minimumSize = 32K (see LV2Plugin::allocate_atom_event_buffers() + * -> 15 * 32K + * it is safe to overflow (but the plugin state may be inconsistent). + */ + rbs = max((size_t) 32768 * 6, rbs); + _from_ui = new RingBuffer<uint8_t>(rbs); } if (!write_to(_from_ui, index, protocol, size, body)) { @@ -1165,8 +1177,10 @@ void LV2Plugin::enable_ui_emmission() { if (!_to_ui) { - _to_ui = new RingBuffer<uint8_t>( - _session.engine().raw_buffer_size(DataType::MIDI) * NBUFS); + /* see note in LV2Plugin::write_from_ui() */ + size_t rbs = _session.engine().raw_buffer_size(DataType::MIDI) * NBUFS; + rbs = max((size_t) 32768 * 8, rbs); + _to_ui = new RingBuffer<uint8_t>(rbs); } } @@ -1901,7 +1915,7 @@ LV2Plugin::Impl::designated_input (const char* uri, void** bufptrs[], void** buf return port; } -static bool lv2_filter (const string& str, void *arg) +static bool lv2_filter (const string& str, void * /* arg*/) { /* Not a dotfile, has a prefix before a period, suffix is "lv2" */ |