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rework VST processing/buffering (no more alloca).

Browse source 
TODO: check Bufferset/VSTBuffer, eventually remove 
the VST_IN_PLACE ifdef’s
This commit is contained in:
Robin Gareus 2015-08-05 23:24:52 +02:00
parent 35a9c631c1
commit 8a08d99058
2 changed files with 41 additions and 4 deletions
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4
libs/ardour/ardour/vst_plugin.h
View file

@ -97,6 +97,10 @@ protected:
AEffect* _plugin;
MidiBuffer* _midi_out_buf;
#ifndef VST_IN_PLACE
float ** _audio_out_buf;
uint32_t _audio_out_buf_cnt;
#endif
};
}

41
libs/ardour/vst_plugin.cc
View file

@ -35,6 +35,10 @@
#include "i18n.h"
#ifndef VST_IN_PLACE
#define MAX_VST_BUFFERSIZE 8192
#endif
using namespace std;
using namespace PBD;
using namespace ARDOUR;
@ -44,13 +48,22 @@ VSTPlugin::VSTPlugin (AudioEngine& engine, Session& session, VSTHandle* handle)
, _handle (handle)
, _state (0)
, _plugin (0)
#ifndef VST_IN_PLACE
, _audio_out_buf (0)
, _audio_out_buf_cnt (0)
#endif
{
}
VSTPlugin::~VSTPlugin ()
{
#ifndef VST_IN_PLACE
for (uint32_t i = 0; i < _audio_out_buf_cnt; ++i) {
free (_audio_out_buf[i]);
}
free (_audio_out_buf);
#endif
}
void
@ -63,6 +76,23 @@ VSTPlugin::set_plugin (AEffect* e)
_plugin->dispatcher (_plugin, effSetSampleRate, 0, 0, NULL, (float) _session.frame_rate());
_plugin->dispatcher (_plugin, effSetBlockSize, 0, _session.get_block_size(), NULL, 0.0f);
#ifndef VST_IN_PLACE
if (_audio_out_buf_cnt != _plugin->numOutputs) {
for (uint32_t i = 0; i < _audio_out_buf_cnt; ++i) {
free (_audio_out_buf[i]);
}
free (_audio_out_buf);
_audio_out_buf_cnt = _plugin->numOutputs;
_audio_out_buf = (float**) malloc (_audio_out_buf_cnt * sizeof(float*));
/* think. Should this be part of the BufferSet ?
* in which case it would be dynamically sized, but then again
* every BufferSet would have N[?] extra VST audio buffers.
*/
for (uint32_t i = 0; i < _audio_out_buf_cnt; ++i) {
_audio_out_buf[i] = (float*) malloc (MAX_VST_BUFFERSIZE * sizeof(float));
}
}
#endif
}
void
@ -563,6 +593,11 @@ VSTPlugin::connect_and_run (BufferSet& bufs,
: silent_bufs.get_audio(0).data(offset);
}
#ifndef VST_IN_PLACE
assert (nframes <= MAX_VST_BUFFERSIZE);
assert (_plugin->numOutputs <= _audio_out_buf_cnt);
#endif
uint32_t out_index = 0;
for (i = 0; i < (int32_t) _plugin->numOutputs; ++i) {
uint32_t index;
@ -576,9 +611,7 @@ VSTPlugin::connect_and_run (BufferSet& bufs,
if (!valid) {
outs[i] = scratch_bufs.get_audio(0).data(offset);
} else {
// TODO if this fixes various VST issues,
// maintain a dedicated buffer, the stack may not be large enough
outs[i] = (float*)alloca (nframes * sizeof(float));
outs[i] = _audio_out_buf[i];
}
#endif
}