Add option to limit automatable control parmaters

[ardour.git] / libs / ardour / audio_port.cc

diff --git a/libs/ardour/audio_port.cc b/libs/ardour/audio_port.cc
index 2fecbf9392c1f5b9600da044f0678c9315164d0d..1a6c30dcf25b5e6b07c66a27257603d59ad1d76c 100644 (file)
--- a/libs/ardour/audio_port.cc
+++ b/libs/ardour/audio_port.cc
@@ -18,6 +18,7 @@
 
 #include <cassert>
 
+#include "pbd/malign.h"
 #include "pbd/stacktrace.h"
 
 #include "ardour/audio_buffer.h"
@@ -29,6 +30,7 @@
 using namespace ARDOUR;
 using namespace std;
 
+#define ENGINE AudioEngine::instance()
 #define port_engine AudioEngine::instance()->port_engine()
 
 AudioPort::AudioPort (const std::string& name, PortFlags flags)
@@ -36,10 +38,14 @@ AudioPort::AudioPort (const std::string& name, PortFlags flags)
        , _buffer (new AudioBuffer (0))
 {
        assert (name.find_first_of (':') == string::npos);
+       cache_aligned_malloc ((void**) &_data, sizeof (Sample) * 8192);
+       _src.setup (_resampler_quality);
+       _src.set_rrfilt (10);
 }
 
 AudioPort::~AudioPort ()
 {
+       cache_aligned_free (_data);
        delete _buffer;
 }
 
@@ -47,22 +53,63 @@ void
 AudioPort::cycle_start (pframes_t nframes)
 {
        /* caller must hold process lock */
-
-        Port::cycle_start (nframes);
+       Port::cycle_start (nframes);
 
        if (sends_output()) {
                _buffer->prepare ();
+       } else if (!externally_connected ()) {
+               /* ardour internal port, just silence input, don't resample */
+               // TODO reset resampler only once
+               _src.reset ();
+               memset (_data, 0, _cycle_nframes * sizeof (float));
+       } else {
+               _src.inp_data  = (float*)port_engine.get_buffer (_port_handle, nframes);
+               _src.inp_count = nframes;
+               _src.out_count = _cycle_nframes;
+               _src.set_rratio (_cycle_nframes / (double)nframes);
+               _src.out_data  = _data;
+               _src.process ();
+               while (_src.out_count > 0) {
+                       *_src.out_data =  _src.out_data[-1];
+                       ++_src.out_data;
+                       --_src.out_count;
+               }
        }
 }
 
 void
 AudioPort::cycle_end (pframes_t nframes)
 {
-        if (sends_output() && !_buffer->written()) {
+       if (sends_output() && !_buffer->written() && _port_handle) {
+               if (!_buffer->data (0)) {
+                       get_audio_buffer (nframes);
+               }
                if (_buffer->capacity() >= nframes) {
                        _buffer->silence (nframes);
                }
        }
+
+       if (sends_output() && _port_handle) {
+
+               if (!externally_connected ()) {
+                       /* ardour internal port, data goes nowhere, skip resampling */
+                       // TODO reset resampler only once
+                       _src.reset ();
+                       return;
+               }
+
+               _src.inp_count = _cycle_nframes;
+               _src.out_count = nframes;
+               _src.set_rratio (nframes / (double)_cycle_nframes);
+               _src.inp_data  = _data;
+               _src.out_data  = (float*)port_engine.get_buffer (_port_handle, nframes);
+               _src.process ();
+               while (_src.out_count > 0) {
+                       *_src.out_data =  _src.out_data[-1];
+                       ++_src.out_data;
+                       --_src.out_count;
+               }
+       }
 }
 
 void
@@ -74,18 +121,26 @@ AudioBuffer&
 AudioPort::get_audio_buffer (pframes_t nframes)
 {
        /* caller must hold process lock */
-       _buffer->set_data ((Sample *) port_engine.get_buffer (_port_handle, _cycle_nframes) +
-                          _global_port_buffer_offset + _port_buffer_offset, nframes);
+       assert (_port_handle);
+
+       Sample* addr;
+
+       if (!externally_connected ()) {
+               addr = (Sample *) port_engine.get_buffer (_port_handle, nframes);
+       } else {
+               /* _data was read and resampled as necessary in ::cycle_start */
+               addr = &_data[_global_port_buffer_offset];
+       }
+
+       _buffer->set_data (addr, nframes);
+
        return *_buffer;
 }
 
-Sample* 
+Sample*
 AudioPort::engine_get_whole_audio_buffer ()
 {
        /* caller must hold process lock */
-       return (Sample *) port_engine.get_buffer (_port_handle, _cycle_nframes);
+       assert (_port_handle);
+       return (Sample *) port_engine.get_buffer (_port_handle, ENGINE->samples_per_cycle());
 }
-
-
-
-