Logo Search packages:      
Sourcecode: blender version File versions  Download package

AUD_JackDevice.cpp

/*
 * $Id$
 *
 * ***** BEGIN LGPL LICENSE BLOCK *****
 *
 * Copyright 2009 Jörg Hermann Müller
 *
 * This file is part of AudaSpace.
 *
 * AudaSpace is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * AudaSpace is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with AudaSpace.  If not, see <http://www.gnu.org/licenses/>.
 *
 * ***** END LGPL LICENSE BLOCK *****
 */

#include "AUD_FloatMixer.h"
#include "AUD_JackDevice.h"
#include "AUD_IReader.h"
#include "AUD_Buffer.h"

#include <stdio.h>
#include <stdlib.h>

// AUD_XXX this is not realtime suitable!
00035 int AUD_JackDevice::jack_mix(jack_nframes_t length, void *data)
{
      AUD_JackDevice* device = (AUD_JackDevice*)data;
      unsigned int samplesize = AUD_SAMPLE_SIZE(device->m_specs);
      if(device->m_buffer->getSize() < samplesize * length)
            device->m_buffer->resize(samplesize * length);
      device->mix(device->m_buffer->getBuffer(), length);

      float* in = (float*) device->m_buffer->getBuffer();
      float* out;
      int count = device->m_specs.channels;

      for(unsigned int i = 0; i < count; i++)
      {
            out = (float*)jack_port_get_buffer(device->m_ports[i], length);
            for(unsigned int j = 0; j < length; j++)
                  out[j] = in[j * count + i];
      }

      return 0;
}

00057 void AUD_JackDevice::jack_shutdown(void *data)
{
      AUD_JackDevice* device = (AUD_JackDevice*)data;
      device->m_valid = false;
}

00063 AUD_JackDevice::AUD_JackDevice(AUD_Specs specs)
{
      if(specs.channels == AUD_CHANNELS_INVALID)
            specs.channels = AUD_CHANNELS_STEREO;

      // jack uses floats
      m_specs = specs;
      m_specs.format = AUD_FORMAT_FLOAT32;

      jack_options_t options = JackNullOption;
      jack_status_t status;

      // open client
      m_client = jack_client_open("Blender", options, &status);
      if(m_client == NULL)
            AUD_THROW(AUD_ERROR_JACK);

      m_buffer = new AUD_Buffer(); AUD_NEW("buffer");

      // set callbacks
      jack_set_process_callback(m_client, AUD_JackDevice::jack_mix, this);
      jack_on_shutdown(m_client, AUD_JackDevice::jack_shutdown, this);

      // register our output channels which are called ports in jack
      m_ports = new jack_port_t*[m_specs.channels]; AUD_NEW("jack_port")

      try
      {
            char portname[64];
            for(int i = 0; i < m_specs.channels; i++)
            {
                  sprintf(portname, "out %d", i+1);
                  m_ports[i] = jack_port_register(m_client, portname,
                                                                  JACK_DEFAULT_AUDIO_TYPE,
                                                                  JackPortIsOutput, 0);
                  if(m_ports[i] == NULL)
                        AUD_THROW(AUD_ERROR_JACK);
            }

            m_specs.rate = (AUD_SampleRate)jack_get_sample_rate(m_client);

            // activate the client
            if(jack_activate(m_client))
                  AUD_THROW(AUD_ERROR_JACK);
      }
      catch(AUD_Exception)
      {
            jack_client_close(m_client);
            delete[] m_ports; AUD_DELETE("jack_port")
            delete m_buffer; AUD_DELETE("buffer");
            throw;
      }

      const char** ports = jack_get_ports(m_client, NULL, NULL,
                                                            JackPortIsPhysical | JackPortIsInput);
      if(ports != NULL)
      {
            for(int i = 0; i < m_specs.channels && ports[i]; i++)
                  jack_connect(m_client, jack_port_name(m_ports[i]), ports[i]);

            free(ports);
      }

      m_mixer = new AUD_FloatMixer(); AUD_NEW("mixer")
      m_mixer->setSpecs(m_specs);

      m_valid = true;

      create();
}

00134 AUD_JackDevice::~AUD_JackDevice()
{
      lock();
      if(m_valid)
            jack_client_close(m_client);
      delete[] m_ports; AUD_DELETE("jack_port")
      delete m_buffer; AUD_DELETE("buffer");
      unlock();

      destroy();
}

00146 void AUD_JackDevice::playing(bool playing)
{
      // Do nothing.
}

Generated by  Doxygen 1.6.0   Back to index