structs.h

   1 /* -*- Mode: C ; c-basic-offset: 2 -*- */
   2 /*
   3  * ALSA SEQ < - > JACK MIDI bridge
   4  *
   5  * Copyright (c) 2006,2007 Dmitry S. Baikov <c0ff@konstruktiv.org>
   6  * Copyright (c) 2007,2008 Nedko Arnaudov <nedko@arnaudov.name>
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; version 2 of the License.
  11  *
  12  *  This program is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with this program; if not, write to the Free Software
  19  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  20  */
  21
  22 #ifndef STRUCTS_H__FD2CC895_411F_4ADE_9200_50FE395EDB72__INCLUDED
  23 #define STRUCTS_H__FD2CC895_411F_4ADE_9200_50FE395EDB72__INCLUDED
  24
  25 #define JACK_INVALID_PORT NULL
  26
  27 #define MAX_PORTS  64
  28 #define MAX_EVENT_SIZE 1024
  29
  30 #define PORT_HASH_BITS 4
  31 #define PORT_HASH_SIZE (1 << PORT_HASH_BITS)
  32
  33 typedef struct a2j_port * a2j_port_hash_t[PORT_HASH_SIZE];
  34
  35 struct a2j;
  36
  37 struct a2j_port
  38 {
  39   struct a2j_port * next;       /* hash - jack */
  40   struct list_head siblings;    /* list - main loop */
  41   struct a2j * a2j_ptr;
  42   bool is_dead;
  43   char name[64];
  44   snd_seq_addr_t remote;
  45   jack_port_t * jack_port;
  46
  47   jack_ringbuffer_t * early_events; // alsa_midi_event_t + data
  48   int64_t last_out_time;
  49
  50   void * jack_buf;
  51 };
  52
  53 struct a2j_stream
  54 {
  55   snd_midi_event_t *codec;
  56
  57   jack_ringbuffer_t *new_ports;
  58
  59   a2j_port_hash_t port_hash;
  60   struct list_head list;
  61 };
  62
  63 struct a2j
  64 {
  65   jack_client_t * jack_client;
  66
  67   snd_seq_t *seq;
  68   int client_id;
  69   int port_id;
  70   int queue;
  71
  72   jack_ringbuffer_t *port_add; // snd_seq_addr_t
  73   jack_ringbuffer_t *port_del; // struct a2j_port*
  74
  75   struct a2j_stream stream[2];
  76 };
  77
  78 #define NSEC_PER_SEC ((int64_t)1000*1000*1000)
  79
  80 struct a2j_process_info
  81 {
  82   int dir;
  83   jack_nframes_t nframes;
  84   jack_nframes_t period_start;
  85   jack_nframes_t sample_rate;
  86   jack_nframes_t cur_frames;
  87   int64_t alsa_time;
  88 };
  89
  90 struct a2j_alsa_midi_event
  91 {
  92   int64_t time;
  93   int size;
  94 };
  95
  96 /* Beside enum use, these are indeces for (struct a2j).stream array */
  97 #define A2J_PORT_CAPTURE   0 // ALSA playback port -> JACK capture port
  98 #define A2J_PORT_PLAYBACK  1 // JACK playback port -> ALSA capture port
  99
 100 extern struct a2j * g_a2j;
 101
 102 #endif /* #ifndef STRUCTS_H__FD2CC895_411F_4ADE_9200_50FE395EDB72__INCLUDED */