diff options
Diffstat (limited to 'libs/ardour/audio_port.cc')
-rw-r--r-- | libs/ardour/audio_port.cc | 105 |
1 files changed, 87 insertions, 18 deletions
diff --git a/libs/ardour/audio_port.cc b/libs/ardour/audio_port.cc index 13dad9b8e0..66d31c63fe 100644 --- a/libs/ardour/audio_port.cc +++ b/libs/ardour/audio_port.cc @@ -18,39 +18,108 @@ #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; -nframes_t AudioPort::_short_over_length = 2; -nframes_t AudioPort::_long_over_length = 10; - -AudioPort::AudioPort(Flags flags) - : Port (DataType::AUDIO, flags), _buffer (0) +AudioPort::AudioPort (const std::string& name, Flags flgs, bool external, nframes_t capacity) + : Port (name, flgs) + , BaseAudioPort (name, flgs) + , PortFacade (name, flgs) { - reset(); + 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; + + } 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, flgs, 0); + + if (sends_output()) { + _buffer = &dynamic_cast<JackAudioPort*>(_ext_port)->get_audio_buffer(); + } + + Port::set_name (_ext_port->name()); + } + + reset (); } -AudioPort::AudioPort(Flags flags, nframes_t nframes) - : Port (DataType::AUDIO, flags), _buffer (nframes) +AudioPort::~AudioPort() { - reset(); + if (_ext_port) { + delete _ext_port; + _ext_port = 0; + } } void AudioPort::reset() { - Port::reset(); - if (_flags & IsOutput) { - if (_buffer.capacity() > 0) { - _buffer.clear(); - } - assert(_buffer.silent()); + BaseAudioPort::reset(); + + if (_ext_port) { + _ext_port->reset (); } - - _metering = 0; - reset_meters (); } +void +AudioPort::cycle_start (nframes_t nframes, nframes_t offset) +{ + /* 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 { + + // 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 (nframes_t nframes, nframes_t offset) +{ +} |