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/* gnu_javax_sound_midi_alsa_AlsaMidiDeviceProvider.c

   Copyright (C) 2005 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 <config.h>

#include <gnu_javax_sound_midi_alsa_AlsaMidiDeviceProvider.h>

#include <alsa/asoundlib.h>

static snd_seq_t *seq;

JNIEXPORT void JNICALL

Java_gnu_javax_sound_midi_alsa_AlsaMidiDeviceProvider_init_1

(JNIEnv *env __attribute__((unused)), jobject this __attribute__((unused)))

{

  int rc = snd_seq_open (&seq, "default", SND_SEQ_OPEN_DUPLEX, SND_SEQ_NONBLOCK);

  if (rc < 0)

    abort ();

  snd_seq_set_client_name(seq, "gnu.javax.sound.midi.alsa");

}

/**

 * Return a CLAZZ[] filled with ports matching TYPE.

 */

static jobjectArray

getPortDeviceInfo (JNIEnv *env, unsigned type, const char *clazz)

{

  jobjectArray rarray;

  snd_seq_client_info_t *cinfo;

  snd_seq_port_info_t *pinfo;

  int client;

  int count = 0;

  jclass icls;

  jmethodID mid;

  snd_seq_client_info_alloca(&cinfo);

  snd_seq_port_info_alloca(&pinfo);

  /* First, count the number of input devices.  */

  snd_seq_client_info_set_client (cinfo, -1);

  while (snd_seq_query_next_client (seq, cinfo) >= 0)

    {

      client = snd_seq_client_info_get_client (cinfo);

      if (client == 0)

        continue;

      snd_seq_port_info_set_client (pinfo, client);

      snd_seq_port_info_set_port (pinfo, -1);

      while (snd_seq_query_next_port (seq, pinfo) >= 0)

        {

          if ((snd_seq_port_info_get_capability (pinfo) & type) != type)

            continue;

          count++;

        }

    }

  icls = (*env)->FindClass(env, clazz);

  mid = (*env)->GetMethodID(env, icls, "<init>",

                            "(Ljava/lang/String;Ljava/lang/String;JJ)V");

  rarray = (jobjectArray) (*env)->NewObjectArray(env, count, icls, NULL);

  /* Now, populate our array.  */

  count = 0;

  snd_seq_client_info_set_client (cinfo, -1);

  while (snd_seq_query_next_client (seq, cinfo) >= 0)

    {

      const char *client_name;

      client = snd_seq_client_info_get_client (cinfo);

      if (client == 0)

        continue;

      snd_seq_port_info_set_client (pinfo, client);

      snd_seq_port_info_set_port (pinfo, -1);

      client_name = snd_seq_client_info_get_name (cinfo);

      while (snd_seq_query_next_port (seq, pinfo) >= 0)

        {

          const char *port_name;

          if ((snd_seq_port_info_get_capability (pinfo) & type) != type)

            continue;

          port_name = snd_seq_port_info_get_name (pinfo);

          (*env)->SetObjectArrayElement(env, rarray, count,

                                        (*env)->NewObject (env, icls, mid,

                                                           (*env)->NewStringUTF (env, client_name),

                                                           (*env)->NewStringUTF (env, port_name),

                                                           (jlong) snd_seq_port_info_get_client(pinfo),

                                                           (jlong) snd_seq_port_info_get_port(pinfo)));

          count++;

        }

    }

  return rarray;

}

JNIEXPORT jobjectArray JNICALL

Java_gnu_javax_sound_midi_alsa_AlsaMidiDeviceProvider_getInputDeviceInfo_1

  (JNIEnv *env, jobject this __attribute__((unused)))

{

  return getPortDeviceInfo (env,

                            (SND_SEQ_PORT_CAP_READ | SND_SEQ_PORT_CAP_SUBS_READ),

                            "gnu/javax/sound/midi/alsa/AlsaMidiDeviceProvider$AlsaInputPortInfo");

}

JNIEXPORT jobjectArray JNICALL

Java_gnu_javax_sound_midi_alsa_AlsaMidiDeviceProvider_getOutputDeviceInfo_1

  (JNIEnv *env, jobject this __attribute__((unused)))

{

  return getPortDeviceInfo (env,

                            (SND_SEQ_PORT_CAP_WRITE | SND_SEQ_PORT_CAP_SUBS_WRITE),

                            "gnu/javax/sound/midi/alsa/AlsaMidiDeviceProvider$AlsaOutputPortInfo");

}