130 lines
3.2 KiB
C
130 lines
3.2 KiB
C
/* -*- Mode: C ; c-basic-offset: 2 -*- */
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/*
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* ALSA SEQ < - > JACK MIDI bridge
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*
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* Copyright (c) 2006,2007 Dmitry S. Baikov <c0ff@konstruktiv.org>
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* Copyright (c) 2007,2008,2009 Nedko Arnaudov <nedko@arnaudov.name>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef STRUCTS_H__FD2CC895_411F_4ADE_9200_50FE395EDB72__INCLUDED
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#define STRUCTS_H__FD2CC895_411F_4ADE_9200_50FE395EDB72__INCLUDED
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#include <semaphore.h>
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#include <jack/midiport.h>
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#define JACK_INVALID_PORT NULL
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#define MAX_PORTS 2048
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#define MAX_EVENT_SIZE 1024
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#define PORT_HASH_BITS 4
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#define PORT_HASH_SIZE (1 << PORT_HASH_BITS)
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typedef struct a2j_port * a2j_port_hash_t[PORT_HASH_SIZE];
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struct a2j;
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struct a2j_port
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{
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struct a2j_port * next; /* hash - jack */
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struct list_head siblings; /* list - main loop */
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struct a2j * a2j_ptr;
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bool is_dead;
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snd_seq_addr_t remote;
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jack_port_t * jack_port;
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jack_ringbuffer_t * inbound_events; // alsa_midi_event_t + data
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int64_t last_out_time;
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void * jack_buf;
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char name[0];
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};
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struct a2j_stream
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{
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snd_midi_event_t *codec;
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jack_ringbuffer_t *new_ports;
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a2j_port_hash_t port_hash;
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struct list_head list;
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};
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struct a2j
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{
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jack_client_t * jack_client;
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snd_seq_t *seq;
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pthread_t alsa_input_thread;
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pthread_t alsa_output_thread;
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int client_id;
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int port_id;
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int queue;
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jack_ringbuffer_t *port_add; // snd_seq_addr_t
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jack_ringbuffer_t *port_del; // struct a2j_port*
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jack_ringbuffer_t * outbound_events; // struct a2j_delivery_event
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jack_nframes_t cycle_start;
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sem_t io_semaphore;
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struct a2j_stream stream[2];
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};
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#define NSEC_PER_SEC ((int64_t)1000*1000*1000)
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struct a2j_process_info
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{
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int dir;
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jack_nframes_t nframes;
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jack_nframes_t period_start;
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jack_nframes_t sample_rate;
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jack_nframes_t cur_frames;
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int64_t alsa_time;
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};
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struct a2j_alsa_midi_event
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{
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int64_t time;
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int size;
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};
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#define MAX_JACKMIDI_EV_SIZE 16
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struct a2j_delivery_event
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{
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struct list_head siblings;
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/* a jack MIDI event, plus the port its destined for: everything
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the ALSA output thread needs to deliver the event. time is
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part of the jack_event.
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*/
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jack_midi_event_t jack_event;
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jack_nframes_t time; /* realtime, not offset time */
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struct a2j_port* port;
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char midistring[MAX_JACKMIDI_EV_SIZE];
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};
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/* Beside enum use, these are indeces for (struct a2j).stream array */
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#define A2J_PORT_CAPTURE 0 // ALSA playback port -> JACK capture port
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#define A2J_PORT_PLAYBACK 1 // JACK playback port -> ALSA capture port
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extern struct a2j * g_a2j;
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extern size_t g_max_jack_port_name_size;
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#endif /* #ifndef STRUCTS_H__FD2CC895_411F_4ADE_9200_50FE395EDB72__INCLUDED */
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