fix crash when copy'ing latent plugins

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

diff --git a/libs/ardour/audio_port.cc b/libs/ardour/audio_port.cc
index c62d31a6d02d6da7860e554ffce669bd2be841c4..33e41c10ad49cc309615af9d4778e0d5d426b610 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
@@ -17,15 +17,21 @@
 */
 
 #include <cassert>
-#include "ardour/audio_port.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/audio_buffer.h"
+#include "ardour/port_engine.h"
 
 using namespace ARDOUR;
 using namespace std;
 
-AudioPort::AudioPort (const std::string& name, Flags flags)
+#define port_engine AudioEngine::instance()->port_engine()
+
+AudioPort::AudioPort (const std::string& name, PortFlags flags)
        : Port (name, DataType::AUDIO, flags)
        , _buffer (new AudioBuffer (0))
 {
@@ -38,35 +44,27 @@ AudioPort::~AudioPort ()
 }
 
 void
-AudioPort::cycle_start (nframes_t nframes)
+AudioPort::cycle_start (pframes_t nframes)
 {
        /* caller must hold process lock */
 
-       /* get_buffer() must only be run on outputs here in cycle_start().
-
-          Inputs must be done in the correct processing order, which 
-          requires interleaving with route processing. that will 
-          happen when Port::get_buffer() is called.
-       */
+        Port::cycle_start (nframes);
 
        if (sends_output()) {
-
-               /* Notice that cycle_start() is always run with the *entire* process cycle frame count,
-                  so we do not bother to apply _port_offset here - we always want the address of the
-                  entire JACK port buffer. We are not collecting data here - just noting the
-                  address where we will write data later in the process cycle.
-               */
-
-               _buffer->set_data ((Sample *) jack_port_get_buffer (_jack_port, nframes), nframes);
                _buffer->prepare ();
        }
 }
 
 void
-AudioPort::cycle_end (nframes_t nframes)
+AudioPort::cycle_end (pframes_t nframes)
 {
-       if (sends_output() && !_buffer->written()) {
-               _buffer->silence (nframes);
+        if (sends_output() && !_buffer->written()) {
+               if (!_buffer->data (0)) {
+                       get_audio_buffer (nframes);
+               }
+               if (_buffer->capacity() >= nframes) {
+                       _buffer->silence (nframes);
+               }
        }
 }
 
@@ -76,24 +74,21 @@ AudioPort::cycle_split ()
 }
 
 AudioBuffer&
-AudioPort::get_audio_buffer (nframes_t nframes, nframes_t offset)
+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);
+       return *_buffer;
+}
 
-       if (receives_input ()) {
-
-               /* Get a pointer to the audio data @ offset + _port_offset within the JACK port buffer and store
-                  it in our _buffer member.
+Sample*
+AudioPort::engine_get_whole_audio_buffer ()
+{
+       /* caller must hold process lock */
+       return (Sample *) port_engine.get_buffer (_port_handle, _cycle_nframes);
+}
 
-                  Note that offset is expected to be zero in almost all cases.
-               */
 
-               _buffer->set_data ((Sample *) jack_port_get_buffer (_jack_port, nframes) + offset + _port_offset, nframes);
-       } 
-       
-       /* output ports set their _buffer data information during ::cycle_start()
-        */
 
-       return *_buffer;
-}