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/* dssi_data.h - DSSI data

   Copyright (C) 2005, 2006 Free Software Foundation, Inc.

This file is part of GNU Classpath.

GNU Classpath is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation; either version 2, or (at your option)

any later version.

GNU Classpath 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

General Public License for more details.

You should have received a copy of the GNU General Public License

along with GNU Classpath; see the file COPYING.  If not, write to the

Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

02110-1301 USA.

Linking this library statically or dynamically with other modules is

making a combined work based on this library.  Thus, the terms and

conditions of the GNU General Public License cover the whole

combination.

As a special exception, the copyright holders of this library give you

permission to link this library with independent modules to produce an

executable, regardless of the license terms of these independent

modules, and to copy and distribute the resulting executable under

terms of your choice, provided that you also meet, for each linked

independent module, the terms and conditions of the license of that

module.  An independent module is a module which is not derived from

or based on this library.  If you modify this library, you may extend

this exception to your version of the library, but you are not

obligated to do so.  If you do not wish to do so, delete this

exception statement from your version. */

#include <stdlib.h>

#include <dlfcn.h>

#include <sys/time.h>

#include <jni.h>

#include <dssi.h>

#include <jack/jack.h>

#include <alsa/asoundlib.h>

#include <alsa/seq.h>

#include <stdio.h>

#include "../classpath/jcl.h"

/* Specify the size of the circular buffer.  It only needs to be big

   enough to hold the events that happen between jack callbacks (~

   1/40th of a second).  */

#define EVENT_BUFFER_SIZE 1024

/* Every DSSI Synthesizer has one of these associated with it.  The

   Java class sees it as a "long" handle.  */

typedef struct

{

  /* This is a handle to the dlopen'ed .so file containing the DSSI

     synthesizer.  */

  void *dlhandle;

  /* The function to call to get the DSS_Descriptor.  */

  DSSI_Descriptor_Function fn;

  /* The descriptor for this synthesizer.  See the dssi.h system

     header.  */

  const DSSI_Descriptor *desc;

  /* We currently open a jack client connection for every

     synthesizer.  */

  jack_client_t *jack_client;

  /* We currently only handle stereo jack connections.  Output from

     mono synthesizers is sent to both left and right ports.  */

  jack_port_t *jack_left_output_port;

  jack_port_t *jack_right_output_port;

  /* We use a circular buffer to hold MIDI events before processing

     them in the jack audio processing callback function.  */

  snd_seq_event_t midiEventBuffer[EVENT_BUFFER_SIZE];

  int midiEventReadIndex;

  int midiEventWriteIndex;

  /* This is a handle the synthesizers underlying LADSPA structure.

     See the ladspa.h system header for details.  */

  LADSPA_Handle plugin_handle;

  /* These are buffers we pass to the DSSI Synthesizer for

     filling.  */

  float *left_buffer;

  float *right_buffer;

  /* The number of input controls for this synth.  */

  unsigned control_count;

  /* An array of control values, control_count in length.  */

  LADSPA_Data *control_values;

  /* A mapping of MIDI controllers to control values.  There are a

     maximum of 128 MIDI controllers.  */

  unsigned control_value_map[128];

  /* A mapping of MIDI controllers to LADSPA ports.  There are a

     maximum of 128 MIDI controllers.  */

  unsigned control_port_map[128];

  /* The sample rate.  */

  jack_nframes_t sample_rate;

} dssi_data;