fix SConstruct so that it can build from a git checkout rather than an svn checkout

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

diff --git a/libs/ardour/audio_port.cc b/libs/ardour/audio_port.cc
index 99f2b7ecae17993e11674f568a0ca0484595c192..714be28f3409c4c0ce7fe4006fd7621bdb9598ba 100644 (file)
--- a/libs/ardour/audio_port.cc
+++ b/libs/ardour/audio_port.cc
@@ -18,52 +18,109 @@
 
 #include <cassert>
 #include <ardour/audio_port.h>
+#include <ardour/jack_audio_port.h>
+#include <ardour/audioengine.h>
 #include <ardour/data_type.h>
 
 using namespace ARDOUR;
 using namespace std;
 
-jack_nframes_t AudioPort::_short_over_length = 2;
-jack_nframes_t AudioPort::_long_over_length = 10;
+AudioPort::AudioPort (const std::string& name, Flags flags, bool external, nframes_t capacity)
+       : Port (name, flags)
+       , BaseAudioPort (name, flags)
+       , PortFacade (name, flags)
+{
+       if (!external || receives_input()) {
+
+               /* internal-only and input ports need their own buffers.
+                  external output ports use the external port buffer.
+               */
+
+               _buffer = new AudioBuffer (capacity);
+               _own_buffer = true;
+       }
+
+       if (!external) {
+
+               _ext_port = 0;
+               set_name (name);
+
+       } else {
+               
+               /* make the JackAudioPort create its own buffer. For input,
+                  we will copy from it during cycle_start(). For output,
+                  we will set up our buffer to point to its buffer, which
+                  will in turn be using the JACK port buffer for data.
+               */
+
+               _ext_port = new JackAudioPort (name, flags, 0);
+
+               if (sends_output()) {
+                       _buffer = &dynamic_cast<JackAudioPort*>(_ext_port)->get_audio_buffer();
+               } 
+
+               Port::set_name (_ext_port->name());
+       }
+
+       reset ();
+}
 
-AudioPort::AudioPort(jack_port_t* p)
-       : Port(p)
-       , _buffer(0)
+AudioPort::~AudioPort()
 {
-       DataType dt(_type);
-       assert(dt == DataType::AUDIO);
-       
-       reset();
+       if (_ext_port) {
+               delete _ext_port;
+               _ext_port = 0;
+       }
 }
 
 void
 AudioPort::reset()
 {
-       Port::reset();
-       if (_flags & JackPortIsOutput) {
-               if (_buffer.capacity() > 0) {
-                       _buffer.clear();
-               }
-               _silent = true;
+       BaseAudioPort::reset();
+
+       if (_ext_port) {
+               _ext_port->reset ();
        }
-       
-       _metering = 0;
-       reset_meters ();
 }
 
+
 void
-AudioPort::cycle_start (jack_nframes_t nframes)
+AudioPort::cycle_start (nframes_t nframes, nframes_t offset)
 {
-       if (_flags & JackPortIsOutput) {
-               // FIXME: do nothing, we can cache the value (but capacity needs to be set)
-               _buffer.set_data((Sample*)jack_port_get_buffer (_port, nframes), nframes);
+       /* caller must hold process lock */
+
+       if (_ext_port) {
+               _ext_port->cycle_start (nframes, offset);
+       }
+
+       if (_flags & IsInput) {
+
+               if (_ext_port) {
+                       _buffer->read_from (dynamic_cast<BaseAudioPort*>(_ext_port)->get_audio_buffer(), nframes, offset);
+
+                       if (!_connections.empty()) {
+                               (*_mixdown) (_connections, _buffer, nframes, offset, false);
+                       }
+
+               } else {
+               
+                       if (_connections.empty()) {
+                               _buffer->silence (nframes, offset);
+                       } else {
+                               (*_mixdown) (_connections, _buffer, nframes, offset, true);
+                       }
+               }
+
        } else {
-               _buffer.set_data((Sample*)jack_port_get_buffer (_port, nframes), nframes);
+               
+               // XXX if we could get the output stage to not purely mix into, but also
+               // to initially overwrite the buffer, we could avoid this silence step.
+               
+               _buffer->silence (nframes, offset);
        }
 }
 
 void
-AudioPort::cycle_end()
+AudioPort::cycle_end (nframes_t nframes, nframes_t offset)
 {
-       // whatever...
 }