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 aa8b363134627123d028b8deea7aa152357a0bba..1a6c30dcf25b5e6b07c66a27257603d59ad1d76c 100644 (file)
--- a/libs/ardour/audio_port.cc
+++ b/libs/ardour/audio_port.cc
@@ -1,5 +1,5 @@
 /*
-    Copyright (C) 2006 Paul Davis 
+    Copyright (C) 2006 Paul Davis
 
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
@@ -17,42 +17,130 @@
 */
 
 #include <cassert>
-#include <ardour/audio_port.h>
-#include <ardour/data_type.h>
+
+#include "pbd/malign.h"
+#include "pbd/stacktrace.h"
+
+#include "ardour/audio_buffer.h"
+#include "ardour/audioengine.h"
+#include "ardour/audio_port.h"
+#include "ardour/data_type.h"
+#include "ardour/port_engine.h"
 
 using namespace ARDOUR;
 using namespace std;
 
-nframes_t AudioPort::_short_over_length = 2;
-nframes_t AudioPort::_long_over_length = 10;
+#define ENGINE AudioEngine::instance()
+#define port_engine AudioEngine::instance()->port_engine()
 
-AudioPort::AudioPort()
-       : _buffer (0)
+AudioPort::AudioPort (const std::string& name, PortFlags flags)
+       : Port (name, DataType::AUDIO, flags)
+       , _buffer (new AudioBuffer (0))
 {
-       _type = DataType::AUDIO;
-       reset();
+       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(nframes_t nframes)
-       : _buffer (nframes)
+AudioPort::~AudioPort ()
 {
-       _type = DataType::AUDIO;
-       reset();
+       cache_aligned_free (_data);
+       delete _buffer;
 }
 
 void
-AudioPort::reset()
+AudioPort::cycle_start (pframes_t nframes)
 {
-       Port::reset();
-       if (_flags & IsOutput) {
-               if (_buffer.capacity() > 0) {
-                       _buffer.clear();
+       /* caller must hold process lock */
+       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;
                }
-               assert(_buffer.silent());
        }
-       
-       _metering = 0;
-       reset_meters ();
 }
 
+void
+AudioPort::cycle_end (pframes_t nframes)
+{
+       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
+AudioPort::cycle_split ()
+{
+}
+
+AudioBuffer&
+AudioPort::get_audio_buffer (pframes_t nframes)
+{
+       /* caller must hold process lock */
+       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*
+AudioPort::engine_get_whole_audio_buffer ()
+{
+       /* caller must hold process lock */
+       assert (_port_handle);
+       return (Sample *) port_engine.get_buffer (_port_handle, ENGINE->samples_per_cycle());
+}