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Better implementation of LV2 plugin<=>UI communication.

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This might use a bit more memory than it could, but it works reliably for me
loading a large Ingen patch inside Ardour as an LV2 plugin, which I'm pretty
sure is by far the most high volume such communication out there.


git-svn-id: svn://localhost/ardour2/branches/3.0@13519 d708f5d6-7413-0410-9779-e7cbd77b26cf
This commit is contained in:
David Robillard 2012-11-18 01:30:53 +00:00
parent d7d47052e8
commit b3d63cc99b
2 changed files with 29 additions and 14 deletions
Download patch file Download diff file Expand all files Collapse all files

6
libs/ardour/ardour/lv2_plugin.h
View file

@ -122,7 +122,7 @@ class LV2Plugin : public ARDOUR::Plugin, public ARDOUR::Workee
bool has_editor () const;
bool has_message_output () const;
void write_from_ui(uint32_t index,
bool write_from_ui(uint32_t index,
uint32_t protocol,
uint32_t size,
const uint8_t* body);
@ -211,12 +211,12 @@ class LV2Plugin : public ARDOUR::Plugin, public ARDOUR::Workee
uint32_t size;
};
void write_to_ui(uint32_t index,
bool write_to_ui(uint32_t index,
uint32_t protocol,
uint32_t size,
const uint8_t* body);
void write_to(RingBuffer<uint8_t>* dest,
bool write_to(RingBuffer<uint8_t>* dest,
uint32_t index,
uint32_t protocol,
uint32_t size,

37
libs/ardour/lv2_plugin.cc
View file

@ -72,6 +72,12 @@
#include <suil/suil.h>
#endif
/** The number of MIDI buffers that will fit in a UI/worker comm buffer.
This needs to be roughly the number of cycles the UI will get around to
actually processing the traffic. Lower values are flakier but save memory.
*/
static const size_t NBUFS = 4;
using namespace std;
using namespace ARDOUR;
using namespace PBD;
@ -341,7 +347,8 @@ LV2Plugin::init(const void* c_plugin, framecnt_t rate)
if (lilv_plugin_has_feature(plugin, worker_schedule)) {
LV2_Worker_Schedule* schedule = (LV2_Worker_Schedule*)malloc(
sizeof(LV2_Worker_Schedule));
_worker = new Worker(this, 4096);
size_t buf_size = _session.engine().raw_buffer_size(DataType::MIDI) * NBUFS;
_worker = new Worker(this, buf_size);
schedule->handle = this;
schedule->schedule_work = work_schedule;
_work_schedule_feature.data = schedule;
@ -1083,7 +1090,7 @@ LV2Plugin::has_message_output() const
return false;
}
void
bool
LV2Plugin::write_to(RingBuffer<uint8_t>* dest,
uint32_t index,
uint32_t protocol,
@ -1099,38 +1106,46 @@ LV2Plugin::write_to(RingBuffer<uint8_t>* dest,
msg->size = size;
memcpy(msg + 1, body, size);
if (dest->write(buf, buf_size) != buf_size) {
error << "Error writing to UI=>Plugin RingBuffer" << endmsg;
}
return (dest->write(buf, buf_size) == buf_size);
}
void
bool
LV2Plugin::write_from_ui(uint32_t index,
uint32_t protocol,
uint32_t size,
const uint8_t* body)
{
if (!_from_ui) {
_from_ui = new RingBuffer<uint8_t>(4096);
_from_ui = new RingBuffer<uint8_t>(
_session.engine().raw_buffer_size(DataType::MIDI) * NBUFS);
}
write_to(_from_ui, index, protocol, size, body);
if (!write_to(_from_ui, index, protocol, size, body)) {
error << "Error writing from UI to plugin" << endmsg;
return false;
}
return true;
}
void
bool
LV2Plugin::write_to_ui(uint32_t index,
uint32_t protocol,
uint32_t size,
const uint8_t* body)
{
write_to(_to_ui, index, protocol, size, body);
if (!write_to(_to_ui, index, protocol, size, body)) {
error << "Error writing from plugin to UI" << endmsg;
return false;
}
return true;
}
void
LV2Plugin::enable_ui_emmission()
{
if (!_to_ui) {
_to_ui = new RingBuffer<uint8_t>(4096);
_to_ui = new RingBuffer<uint8_t>(
_session.engine().raw_buffer_size(DataType::MIDI) * NBUFS);
}
}