/*
- 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
*/
#include <cassert>
-#include <ardour/audio_port.h>
-#include <ardour/jack_audio_port.h>
-#include <ardour/audioengine.h>
-#include <ardour/data_type.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 flgs, bool external, nframes_t capacity)
- : Port (name, flgs)
- , BaseAudioPort (name, flgs)
- , PortFacade (name, flgs)
-{
- if (!external || receives_input()) {
+nframes_t AudioPort::_port_offset = 0;
- /* internal-only and input ports need their own buffers.
- external output ports use the external port buffer.
- */
+AudioPort::AudioPort (const std::string& name, Flags flags)
+ : Port (name, DataType::AUDIO, flags)
+ , _buffer (new AudioBuffer (0))
+{
+ assert (name.find_first_of (':') == string::npos);
+}
- _buffer = new AudioBuffer (capacity);
- _own_buffer = true;
- }
+AudioPort::~AudioPort ()
+{
+ delete _buffer;
+}
- if (!external) {
+void
+AudioPort::cycle_start (nframes_t nframes)
+{
+ /* caller must hold process lock */
- _ext_port = 0;
+ /* get_buffer() must only be run on outputs here in cycle_start().
- } 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.
- */
+ Inputs must be done in the correct processing order, which
+ requires interleaving with route processing. that will
+ happen when Port::get_buffer() is called.
+ */
- _ext_port = new JackAudioPort (name, flgs, 0);
+ if (sends_output()) {
- if (sends_output()) {
- _buffer = &dynamic_cast<JackAudioPort*>(_ext_port)->get_audio_buffer();
- }
+ /* 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.
+ */
- Port::set_name (_ext_port->name());
+ _buffer->set_data ((Sample *) jack_port_get_buffer (_jack_port, nframes), nframes);
+ _buffer->prepare ();
}
-
- reset ();
}
-AudioPort::~AudioPort()
+void
+AudioPort::cycle_end (nframes_t nframes)
{
- if (_ext_port) {
- delete _ext_port;
- _ext_port = 0;
+ if (sends_output() && !_buffer->written()) {
+ _buffer->silence (nframes);
}
}
void
-AudioPort::reset()
+AudioPort::cycle_split ()
{
- BaseAudioPort::reset();
-
- if (_ext_port) {
- _ext_port->reset ();
- }
}
-
-void
-AudioPort::cycle_start (nframes_t nframes, nframes_t offset)
+AudioBuffer&
+AudioPort::get_audio_buffer (nframes_t nframes, nframes_t offset)
{
/* caller must hold process lock */
- if (_ext_port) {
- _ext_port->cycle_start (nframes, offset);
- }
+ 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.
- 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 {
-
- // 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);
+ 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;
}
-void
-AudioPort::cycle_end (nframes_t nframes, nframes_t offset)
+size_t
+AudioPort::raw_buffer_size (nframes_t nframes) const
{
+ return nframes * sizeof (Sample);
}
+