73192bc1a7
git-svn-id: svn://localhost/ardour2/branches/3.0@8166 d708f5d6-7413-0410-9779-e7cbd77b26cf
108 lines
2.8 KiB
C++
108 lines
2.8 KiB
C++
/*
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Copyright (C) 2006 Paul Davis
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <cassert>
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#include "ardour/audio_port.h"
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#include "ardour/audioengine.h"
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#include "ardour/data_type.h"
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#include "ardour/audio_buffer.h"
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using namespace ARDOUR;
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using namespace std;
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framecnt_t AudioPort::_port_offset = 0;
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AudioPort::AudioPort (const std::string& name, Flags flags)
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: Port (name, DataType::AUDIO, flags)
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, _buffer (new AudioBuffer (0))
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{
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assert (name.find_first_of (':') == string::npos);
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}
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AudioPort::~AudioPort ()
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{
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delete _buffer;
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}
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void
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AudioPort::cycle_start (pframes_t nframes)
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{
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/* caller must hold process lock */
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/* get_buffer() must only be run on outputs here in cycle_start().
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Inputs must be done in the correct processing order, which
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requires interleaving with route processing. that will
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happen when Port::get_buffer() is called.
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*/
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if (sends_output()) {
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/* Notice that cycle_start() is always run with the *entire* process cycle frame count,
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so we do not bother to apply _port_offset here - we always want the address of the
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entire JACK port buffer. We are not collecting data here - just noting the
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address where we will write data later in the process cycle.
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*/
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_buffer->set_data ((Sample *) jack_port_get_buffer (_jack_port, nframes), nframes);
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_buffer->prepare ();
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}
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}
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void
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AudioPort::cycle_end (pframes_t nframes)
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{
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if (sends_output() && !_buffer->written()) {
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_buffer->silence (nframes);
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}
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}
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void
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AudioPort::cycle_split ()
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{
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}
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AudioBuffer&
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AudioPort::get_audio_buffer (framecnt_t nframes, framecnt_t offset)
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{
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/* caller must hold process lock */
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if (receives_input ()) {
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/* Get a pointer to the audio data @ offset + _port_offset within the JACK port buffer and store
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it in our _buffer member.
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Note that offset is expected to be zero in almost all cases.
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*/
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_buffer->set_data ((Sample *) jack_port_get_buffer (_jack_port, nframes) + offset + _port_offset, nframes);
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}
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/* output ports set their _buffer data information during ::cycle_start()
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*/
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return *_buffer;
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}
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size_t
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AudioPort::raw_buffer_size (pframes_t nframes) const
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{
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return nframes * sizeof (Sample);
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}
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