how about that ... a monitor/main section .. GUI is still unfinished .. several small...

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

diff --git a/libs/ardour/audio_port.cc b/libs/ardour/audio_port.cc
index 558ae72a97810dd8a809610fde64c323e27493da..a75f7d7a09163058b624bcaf6788763b687331ac 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
@@ -17,17 +17,16 @@
 */
 
 #include <cassert>
-#include <ardour/audio_port.h>
-#include <ardour/audioengine.h>
-#include <ardour/data_type.h>
-#include <ardour/audio_buffer.h>
+#include "ardour/audio_port.h"
+#include "ardour/audioengine.h"
+#include "ardour/data_type.h"
+#include "ardour/audio_buffer.h"
 
 using namespace ARDOUR;
 using namespace std;
 
 AudioPort::AudioPort (const std::string& name, Flags flags)
        : Port (name, DataType::AUDIO, flags)
-       , _buffer_data_set (false)
        , _buffer (new AudioBuffer (0))
 {
        assert (name.find_first_of (':') == string::npos);
@@ -39,47 +38,68 @@ AudioPort::~AudioPort ()
 }
 
 void
-AudioPort::cycle_start (nframes_t nframes, nframes_t offset)
+AudioPort::cycle_start (nframes_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 
+          Inputs must be done in the correct processing order, which
+          requires interleaving with route processing. that will
           happen when Port::get_buffer() is called.
        */
 
-       if (sends_output() && !_buffer_data_set) {
-               
-               _buffer->set_data ((Sample *) jack_port_get_buffer (_jack_port, nframes) + offset, nframes);
-               _buffer_data_set = true;
-               
+       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 ();
        }
+}
 
-       if (receives_input()) {
-               _buffer_data_set = false;
-       } else {
-               _buffer->silence (nframes, offset);
+void
+AudioPort::cycle_end (nframes_t nframes)
+{
+       if (sends_output() && !_buffer->written()) {
+               _buffer->silence (nframes);
        }
 }
 
-AudioBuffer &
+void
+AudioPort::cycle_split ()
+{
+}
+
+AudioBuffer&
 AudioPort::get_audio_buffer (nframes_t nframes, nframes_t offset)
 {
        /* caller must hold process lock */
 
-       if (receives_input () && !_buffer_data_set) {
+       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.
+
+                  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()
+        */
 
-               _buffer->set_data ((Sample *) jack_port_get_buffer (_jack_port, nframes) + offset, nframes);
-               
-       } 
-       
        return *_buffer;
 }
 
-void
-AudioPort::cycle_end (nframes_t nframes, nframes_t offset)
+size_t
+AudioPort::raw_buffer_size(nframes_t nframes) const
 {
-       _buffer_data_set = false;
+       return nframes * sizeof(float);
 }
+