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Connect LV2 Atom ports for latency compute run

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This fixes an issue with LV2 plugin that unconditionally
initialize LV2 Atom ports even if they are not connected.
eg. JUCE7 produces LV2s at the time of writing.
This commit is contained in:
Robin Gareus 2022-07-24 17:38:53 +02:00
parent 5f5f4599f2
commit 191dbf7c34
Signed by: rgareus
GPG Key ID: A090BCE02CF57F04
1 changed files with 29 additions and 17 deletions
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46
libs/ardour/lv2_plugin.cc
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@ -3283,43 +3283,55 @@ LV2Plugin::latency_compute_run()
return;
}
// Run the plugin so that it can set its latency parameter
/* Run the plugin so that it can set its latency parameter
* Note: since Ardour 5, plugins can dynamically change latency
* so this call is not required anymore, but doing
* an intial silent-run is likely a good idea regardless.
*/
bool was_activated = _was_activated;
activate();
uint32_t port_index = 0;
uint32_t in_index = 0;
uint32_t out_index = 0;
// this is done in the main thread. non realtime.
const samplecnt_t bufsize = _engine.samples_per_cycle();
float* buffer = (float*) malloc(_engine.samples_per_cycle() * sizeof(float));
std::vector<LV2_Evbuf*> ev_buffers;
memset(buffer, 0, sizeof(float) * bufsize);
// FIXME: Ensure plugins can handle in-place processing
port_index = 0;
while (port_index < parameter_count()) {
if (parameter_is_audio(port_index)) {
if (parameter_is_input(port_index)) {
lilv_instance_connect_port(_impl->instance, port_index, buffer);
in_index++;
} else if (parameter_is_output(port_index)) {
lilv_instance_connect_port(_impl->instance, port_index, buffer);
out_index++;
for (uint32_t port_index = 0; port_index < parameter_count (); ++port_index) {
PortFlags flags = _port_flags[port_index];
if (flags & PORT_AUDIO) {
lilv_instance_connect_port(_impl->instance, port_index, buffer);
} else if (flags & PORT_SEQUENCE) {
int buf_size = 8192;
#if 1 /* honor the min port-size here */
const LilvPort* port = lilv_plugin_get_port_by_index(_impl->plugin, port_index);
LilvNodes* min_size_v = lilv_port_get_value(_impl->plugin, port, _world.rsz_minimumSize);
LilvNode* min_size = min_size_v ? lilv_nodes_get_first(min_size_v) : NULL;
if (min_size && lilv_node_is_int(min_size)) {
buf_size = std::max (buf_size, lilv_node_as_int (min_size));
}
lilv_nodes_free(min_size_v);
#endif
ev_buffers.push_back (lv2_evbuf_new (buf_size, _uri_map.urids.atom_Chunk, _uri_map.urids.atom_Sequence));
void* buf = lv2_evbuf_get_buffer (ev_buffers.back ());
lilv_instance_connect_port(_impl->instance, port_index, buf);
}
port_index++;
}
run(bufsize, true);
run (bufsize, true); // XXX prefer run (0, true)
deactivate();
if (was_activated) {
activate();
}
while (!ev_buffers.empty ()) {
lv2_evbuf_free (ev_buffers.back ());
ev_buffers.pop_back ();
}
free(buffer);
}