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umidi20.c
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umidi20.c
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/*-
* Copyright (c) 2006-2022 Hans Petter Selasky. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/uio.h>
#include <sys/file.h>
#include <sys/time.h>
#include <stdio.h>
#include <time.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#ifdef __APPLE__
#include <mach/mach_time.h>
#include <sched.h>
static mach_timebase_info_data_t umidi20_timebase_info;
#endif
#include "umidi20.h"
#ifdef HAVE_DEBUG
#define DPRINTF(fmt, ...) \
printf("%s:%d: " fmt, __FUNCTION__, __LINE__,## __VA_ARGS__)
#else
#define DPRINTF(fmt, ...) do { } while (0)
#endif
#define PTHREAD_NULL ((pthread_t)-1L)
#define STRLCPY(a,b,c) do { \
strncpy(a,b,c); ((char *)(a))[(c)-1] = 0; \
} while (0)
/* prototypes */
static void *umidi20_watchdog_alloc(void *arg);
static void *umidi20_watchdog_play_rec(void *arg);
static void umidi20_watchdog_record_sub(struct umidi20_device *dev, struct umidi20_device *play_dev, uint32_t position);
static void umidi20_watchdog_play_sub(struct umidi20_device *dev, uint32_t position);
static void *umidi20_watchdog_files(void *arg);
static void umidi20_stop_thread(pthread_t *p_td, pthread_mutex_t *mtx);
static void *umidi20_watchdog_song(void *arg);
static void umidi20_exec_timer(uint32_t pos);
/* structures */
struct umidi20_root_device root_dev;
struct umidi20_timer_entry {
TAILQ_ENTRY(umidi20_timer_entry) entry;
umidi20_timer_callback_t *fn;
void *arg;
uint32_t ms_interval;
uint32_t timeout_pos;
uint8_t pending;
};
/* functions */
uint32_t
umidi20_get_curr_position(void)
{
uint32_t position;
pthread_mutex_lock(&root_dev.mutex);
position = root_dev.curr_position;
pthread_mutex_unlock(&root_dev.mutex);
return (position);
}
void
umidi20_set_record_event_callback(uint8_t device_no, umidi20_event_callback_t *func, void *arg)
{
if (device_no >= UMIDI20_N_DEVICES)
return;
root_dev.rec[device_no].event_callback_func = func;
root_dev.rec[device_no].event_callback_arg = arg;
}
void
umidi20_set_play_event_callback(uint8_t device_no, umidi20_event_callback_t *func, void *arg)
{
if (device_no >= UMIDI20_N_DEVICES)
return;
root_dev.play[device_no].event_callback_func = func;
root_dev.play[device_no].event_callback_arg = arg;
}
void
umidi20_init(void)
{
uint32_t x;
umidi20_mutex_init(&root_dev.mutex);
pthread_cond_init(&root_dev.cond, NULL);
#ifdef __APPLE__
mach_timebase_info(&umidi20_timebase_info);
#endif
umidi20_gettime(&(root_dev.curr_time));
root_dev.start_time = root_dev.curr_time;
root_dev.curr_position = 0;
TAILQ_INIT(&root_dev.timers);
for (x = 0; x < UMIDI20_N_DEVICES; x++) {
root_dev.rec[x].pipe = NULL;
root_dev.rec[x].device_no = x;
root_dev.rec[x].update = 1;
snprintf(root_dev.rec[x].fname,
sizeof(root_dev.rec[x].fname),
"/dev/umidi0.%x", x);
root_dev.play[x].pipe = NULL;
root_dev.play[x].device_no = x;
root_dev.play[x].update = 1;
snprintf(root_dev.play[x].fname,
sizeof(root_dev.play[x].fname),
"/dev/umidi0.%x", x);
}
if (pthread_create(&(root_dev.thread_alloc), NULL,
&umidi20_watchdog_alloc, NULL)) {
root_dev.thread_alloc = PTHREAD_NULL;
}
if (pthread_create(&(root_dev.thread_play_rec), NULL,
&umidi20_watchdog_play_rec, NULL)) {
root_dev.thread_play_rec = PTHREAD_NULL;
}
if (pthread_create(&(root_dev.thread_files), NULL,
&umidi20_watchdog_files, NULL)) {
root_dev.thread_files = PTHREAD_NULL;
}
}
void
umidi20_uninit(void)
{
pthread_mutex_lock(&root_dev.mutex);
umidi20_stop_thread(&(root_dev.thread_alloc),
&root_dev.mutex);
umidi20_stop_thread(&(root_dev.thread_play_rec),
&root_dev.mutex);
pthread_mutex_unlock(&root_dev.mutex);
}
static void
umidi20_stop_thread(pthread_t *p_td, pthread_mutex_t *p_mtx)
{
pthread_t td;
uint8_t recurse = 0;
pthread_mutex_assert(p_mtx, MA_OWNED);
td = *p_td;
*p_td = PTHREAD_NULL;
if (td != PTHREAD_NULL) {
while (pthread_mutex_unlock(p_mtx) == 0)
recurse++;
#ifdef _WIN32
pthread_kill(td, SIGINT);
#else
pthread_kill(td, SIGURG);
#endif
pthread_join(td, NULL);
while (recurse--)
pthread_mutex_lock(p_mtx);
}
}
static void *
umidi20_watchdog_alloc(void *arg)
{
struct umidi20_event *event;
pthread_mutex_lock(&root_dev.mutex);
while (root_dev.thread_alloc != PTHREAD_NULL) {
while (UMIDI20_IF_QLEN(&(root_dev.free_queue)) < UMIDI20_BUF_EVENTS) {
pthread_mutex_unlock(&root_dev.mutex);
event = umidi20_event_alloc(NULL, 0);
pthread_mutex_lock(&root_dev.mutex);
if (event) {
UMIDI20_IF_ENQUEUE_LAST(&(root_dev.free_queue), event);
} else {
break;
}
}
pthread_mutex_unlock(&root_dev.mutex);
usleep(100000);
pthread_mutex_lock(&root_dev.mutex);
}
pthread_mutex_unlock(&root_dev.mutex);
return NULL;
}
static void *
umidi20_watchdog_play_rec(void *arg)
{
struct timespec ts = {0, 0};
uint32_t position;
uint32_t x;
pthread_mutex_lock(&root_dev.mutex);
while (root_dev.thread_play_rec != PTHREAD_NULL) {
umidi20_gettime(&ts);
root_dev.curr_time = ts;
position = umidi20_difftime
(&(root_dev.curr_time), &(root_dev.start_time));
root_dev.curr_position = position;
for (x = 0; x < UMIDI20_N_DEVICES; x++) {
umidi20_watchdog_record_sub(&(root_dev.rec[x]), &(root_dev.play[x]),
position);
}
umidi20_exec_timer(position);
for (x = 0; x < UMIDI20_N_DEVICES; x++) {
umidi20_watchdog_play_sub(&(root_dev.play[x]), position);
}
pthread_mutex_unlock(&root_dev.mutex);
usleep(1000);
pthread_mutex_lock(&root_dev.mutex);
}
pthread_mutex_unlock(&root_dev.mutex);
return NULL;
}
static void
umidi20_exec_timer(uint32_t pos)
{
struct umidi20_timer_entry *entry;
int32_t delta;
restart:
TAILQ_FOREACH(entry, &root_dev.timers, entry) {
delta = entry->timeout_pos - pos;
if ((delta < 0) || ((uint32_t)delta > entry->ms_interval)) {
/* check if next timeout is valid, else reset */
if (delta < -1000 || (uint32_t)delta > entry->ms_interval) {
/* reset */
entry->timeout_pos = pos;
} else if (delta < 0) {
/* try to stay sync */
while (delta < 0) {
/* try to stay sync */
entry->timeout_pos += entry->ms_interval;
delta += entry->ms_interval;
}
entry->timeout_pos -= entry->ms_interval;
}
entry->pending = 1;
pthread_mutex_unlock(&root_dev.mutex);
(entry->fn) (entry->arg);
pthread_mutex_lock(&root_dev.mutex);
entry->pending = 0;
pthread_cond_broadcast(&root_dev.cond);
/* allow callback to update the interval */
entry->timeout_pos += entry->ms_interval;
goto restart;
}
}
}
void
umidi20_update_timer(umidi20_timer_callback_t *fn, void *arg, uint32_t ms_interval, uint8_t do_sync)
{
struct umidi20_timer_entry *entry;
/* check for invalid interval */
if (ms_interval == 0)
return;
/* check for too big interval */
if (ms_interval > 65535)
ms_interval = 65535;
pthread_mutex_lock(&root_dev.mutex);
TAILQ_FOREACH(entry, &root_dev.timers, entry) {
if ((entry->fn == fn) && (entry->arg == arg)) {
break;
}
}
if (entry != NULL) {
entry->ms_interval = ms_interval;
if (do_sync)
entry->timeout_pos = root_dev.curr_position;
}
pthread_mutex_unlock(&root_dev.mutex);
}
void
umidi20_set_timer(umidi20_timer_callback_t *fn, void *arg, uint32_t ms_interval)
{
struct umidi20_timer_entry *entry;
struct umidi20_timer_entry *new_entry;
if (ms_interval == 0) {
umidi20_unset_timer(fn, arg);
return;
}
if (ms_interval > 65535)
ms_interval = 65535;
new_entry = malloc(sizeof(*new_entry));
if (new_entry == NULL)
return;
pthread_mutex_lock(&root_dev.mutex);
TAILQ_FOREACH(entry, &root_dev.timers, entry) {
if ((entry->fn == fn) && (entry->arg == arg)) {
break;
}
}
if (entry != NULL) {
/* first timeout ASAP */
entry->ms_interval = ms_interval;
entry->timeout_pos = root_dev.curr_position;
pthread_mutex_unlock(&root_dev.mutex);
free(new_entry);
return;
}
new_entry->fn = fn;
new_entry->arg = arg;
new_entry->ms_interval = ms_interval;
new_entry->timeout_pos = root_dev.curr_position + ms_interval;
new_entry->pending = 0;
TAILQ_INSERT_TAIL(&root_dev.timers, new_entry, entry);
pthread_mutex_unlock(&root_dev.mutex);
}
void
umidi20_unset_timer(umidi20_timer_callback_t *fn, void *arg)
{
struct umidi20_timer_entry *entry;
pthread_mutex_lock(&root_dev.mutex);
TAILQ_FOREACH(entry, &root_dev.timers, entry) {
if ((entry->fn == fn) && (entry->arg == arg)) {
TAILQ_REMOVE(&root_dev.timers, entry, entry);
while (entry->pending != 0)
pthread_cond_wait(&root_dev.cond, &root_dev.mutex);
pthread_mutex_unlock(&root_dev.mutex);
free(entry);
return;
}
}
pthread_mutex_unlock(&root_dev.mutex);
}
static void
umidi20_watchdog_record_sub(struct umidi20_device *dev,
struct umidi20_device *play_dev,
uint32_t curr_position)
{
struct umidi20_event *event;
ssize_t len;
uint8_t cmd[16];
uint8_t drop;
uint8_t x;
curr_position -= dev->start_position;
if (curr_position >= dev->end_offset) {
/* time overflow */
if (dev->enabled_usr) {
DPRINTF("time overflow\n");
dev->enabled_usr = 0;
}
}
/* record */
if (dev->pipe == NULL)
return;
/*
* Read data regularly so that the buffer-size is kept
* low, even if not recording. A length of zero
* usually means end of file.
*/
if ((len = umidi20_pipe_read_data(dev->pipe, cmd, sizeof(cmd))) <= 0) {
if (len < 0)
dev->update = 1;
return;
}
if (dev->enabled_usr == 0)
return;
for (x = 0; x != (uint8_t)len; x++) {
event = umidi20_convert_to_event(&(dev->conv), cmd[x], 1);
if (event == NULL)
continue;
DPRINTF("pos = %d\n", curr_position);
event->device_no = dev->device_no;
event->position = curr_position;
drop = 0;
if (dev->event_callback_func != NULL) {
pthread_mutex_unlock(&root_dev.mutex);
(dev->event_callback_func) (dev->device_no,
dev->event_callback_arg, event, &drop);
pthread_mutex_lock(&root_dev.mutex);
}
if (drop) {
umidi20_event_free(event);
} else {
umidi20_event_queue_insert
(&(dev->queue), event, UMIDI20_CACHE_INPUT);
}
}
}
static void
umidi20_watchdog_play_sub(struct umidi20_device *dev,
uint32_t curr_position)
{
struct umidi20_event *event;
struct umidi20_event *event_root;
uint32_t delta_position;
ssize_t err;
uint8_t len;
uint8_t drop;
/* playback */
curr_position -= dev->start_position;
if (curr_position >= dev->end_offset) {
/* time overflow */
if (dev->enabled_usr) {
DPRINTF("time overflow\n");
dev->enabled_usr = 0;
}
return;
}
while (1) {
UMIDI20_IF_POLL_HEAD(&(dev->queue), event_root);
event = event_root;
if (event == NULL) {
break;
}
delta_position = (event->position - curr_position);
if (delta_position >= 0x80000000) {
drop = 0;
if (dev->event_callback_func != NULL) {
pthread_mutex_unlock(&root_dev.mutex);
(dev->event_callback_func) (dev->device_no,
dev->event_callback_arg, event, &drop);
pthread_mutex_lock(&root_dev.mutex);
}
if ((dev->pipe != NULL) &&
(dev->enabled_usr) &&
(event->cmd[1] != 0xFF) &&
(!drop)) {
/* only write non-meta/reset commands */
do {
len = umidi20_command_to_len[event->cmd[0] & 0xF];
if (umidi20_event_is_key_start(event))
dev->any_key_start = 1;
/* try to write data */
err = umidi20_pipe_write_data(dev->pipe, event->cmd + 1, len);
if (err < 0) {
/* try to re-open the device */
dev->update = 1;
break;
} else if (err != len) {
/*
* we are done - the queue
* is full
*/
break;
}
} while ((event = event->p_next));
}
UMIDI20_IF_REMOVE(&(dev->queue), event_root);
umidi20_event_free(event_root);
} else {
break;
}
}
}
static void *
umidi20_watchdog_files(void *arg)
{
struct umidi20_device *dev;
struct umidi20_pipe **pipe;
uint32_t x;
pthread_mutex_lock(&root_dev.mutex);
while (root_dev.thread_files != PTHREAD_NULL) {
for (x = 0; x < UMIDI20_N_DEVICES; x++) {
dev = &root_dev.play[x];
if (dev->update) {
pipe = dev->pipe;
dev->pipe = NULL;
if (pipe != NULL) {
switch (dev->enabled_cfg_last) {
case UMIDI20_ENABLED_CFG_DEV:
umidi20_cdev_tx_close(x);
break;
case UMIDI20_ENABLED_CFG_JACK:
umidi20_jack_tx_close(x);
break;
case UMIDI20_ENABLED_CFG_COREMIDI:
umidi20_coremidi_tx_close(x);
break;
case UMIDI20_ENABLED_CFG_ANDROID:
umidi20_android_tx_close(x);
break;
case UMIDI20_ENABLED_CFG_ALSA:
umidi20_alsa_tx_close(x);
break;
default:
break;
}
}
switch (dev->enabled_cfg) {
case UMIDI20_ENABLED_CFG_DEV:
pipe = umidi20_cdev_tx_open(x, dev->fname);
break;
case UMIDI20_ENABLED_CFG_JACK:
pipe = umidi20_jack_tx_open(x, dev->fname);
break;
case UMIDI20_ENABLED_CFG_COREMIDI:
pipe = umidi20_coremidi_tx_open(x, dev->fname);
break;
case UMIDI20_ENABLED_CFG_ANDROID:
pipe = umidi20_android_tx_open(x, dev->fname);
break;
case UMIDI20_ENABLED_CFG_ALSA:
pipe = umidi20_alsa_tx_open(x, dev->fname);
break;
default:
pipe = NULL;
break;
}
if (pipe != NULL) {
dev->enabled_cfg_last = dev->enabled_cfg;
dev->update = 0;
dev->pipe = pipe;
} else {
dev->enabled_cfg_last = UMIDI20_DISABLE_CFG;
}
}
dev = &root_dev.rec[x];
if (dev->update) {
pipe = dev->pipe;
dev->pipe = NULL;
if (pipe != NULL) {
switch (dev->enabled_cfg_last) {
case UMIDI20_ENABLED_CFG_DEV:
umidi20_cdev_rx_close(x);
break;
case UMIDI20_ENABLED_CFG_JACK:
umidi20_jack_rx_close(x);
break;
case UMIDI20_ENABLED_CFG_COREMIDI:
umidi20_coremidi_rx_close(x);
break;
case UMIDI20_ENABLED_CFG_ANDROID:
umidi20_android_rx_close(x);
break;
case UMIDI20_ENABLED_CFG_ALSA:
umidi20_alsa_rx_close(x);
break;
default:
break;
}
}
switch (dev->enabled_cfg) {
case UMIDI20_ENABLED_CFG_DEV:
pipe = umidi20_cdev_rx_open(x, dev->fname);
break;
case UMIDI20_ENABLED_CFG_JACK:
pipe = umidi20_jack_rx_open(x, dev->fname);
break;
case UMIDI20_ENABLED_CFG_COREMIDI:
pipe = umidi20_coremidi_rx_open(x, dev->fname);
break;
case UMIDI20_ENABLED_CFG_ANDROID:
pipe = umidi20_android_rx_open(x, dev->fname);
break;
case UMIDI20_ENABLED_CFG_ALSA:
pipe = umidi20_alsa_rx_open(x, dev->fname);
break;
default:
pipe = NULL;
break;
}
if (pipe != NULL) {
dev->enabled_cfg_last = dev->enabled_cfg;
dev->update = 0;
dev->pipe = pipe;
} else {
dev->enabled_cfg_last = UMIDI20_DISABLE_CFG;
}
}
}
pthread_mutex_unlock(&root_dev.mutex);
usleep(100000);
pthread_mutex_lock(&root_dev.mutex);
}
pthread_mutex_unlock(&root_dev.mutex);
return NULL;
}
/*
* flag: 0 - default
* 1 - use cache
*/
struct umidi20_event *
umidi20_event_alloc(struct umidi20_event ***ppp_next, uint8_t flag)
{
struct umidi20_event *event = NULL;
if (flag == 1) {
pthread_mutex_lock(&root_dev.mutex);
UMIDI20_IF_DEQUEUE(&(root_dev.free_queue), event);
pthread_mutex_unlock(&root_dev.mutex);
}
if (event == NULL) {
event = malloc(sizeof(*event));
}
if (event) {
memset(event, 0, sizeof(*event));
if (ppp_next) {
**ppp_next = event;
*ppp_next = &(event->p_next);
}
}
return event;
}
void
umidi20_event_free(struct umidi20_event *event)
{
struct umidi20_event *p_next;
while (event) {
p_next = event->p_next;
free(event);
event = p_next;
}
}
struct umidi20_event *
umidi20_event_copy(struct umidi20_event *event, uint8_t flag)
{
struct umidi20_event *p_curr;
struct umidi20_event *p_next = NULL;
struct umidi20_event **pp_next = &p_next;
while (event) {
p_curr = umidi20_event_alloc(&pp_next, flag);
if (p_curr == NULL) {
goto fail;
}
/* copy data */
p_curr->position = event->position;
p_curr->revision = event->revision;
p_curr->tick = event->tick;
p_curr->device_no = event->device_no;
memcpy(p_curr->cmd, event->cmd, UMIDI20_COMMAND_LEN);
/* get next event */
event = event->p_next;
}
return p_next;
fail:
umidi20_event_free(p_next);
return NULL;
}
struct umidi20_event *
umidi20_event_from_data(const uint8_t *data_ptr,
uint32_t data_len, uint8_t flag)
{
struct umidi20_event *p_curr = NULL;
struct umidi20_event *p_next = NULL;
struct umidi20_event **pp_next = &p_next;
uint8_t i;
uint8_t cont = 0;
static const uint8_t p0 = 0;
static const uint8_t s0 = 0;
if (data_len == 0) {
goto fail;
}
p_curr = umidi20_event_alloc(&pp_next, flag);
if (p_curr == NULL) {
goto fail;
}
i = 1;
while (1) {
if (data_len == 0) {
p_curr->cmd[0] = (p0 | s0 | (i - 1));
break;
}
if (i == 8) {
p_curr->cmd[0] = (cont ?
(p0 | s0 | 0x8) :
(p0 | s0 | 0x0));
i = 1;
cont = 1;
p_curr = umidi20_event_alloc(&pp_next, flag);
if (p_curr == NULL) {
goto fail;
}
}
p_curr->cmd[i] = *data_ptr;
i++;
data_ptr++;
data_len--;
}
return p_next;
fail:
umidi20_event_free(p_next);
return NULL;
}
uint8_t *
umidi20_event_pointer(struct umidi20_event *event, uint32_t offset)
{
while (1) {
uint32_t len = umidi20_event_get_length_first(event);
if (offset >= len) {
offset -= len;
event = event->p_next;
} else {
return (&event->cmd[1 + offset]);
}
}
}
uint32_t
umidi20_event_get_what(struct umidi20_event *event)
{
if (event == NULL)
return 0;
switch (event->cmd[1] >> 4) {
case 0x8:
case 0x9:
return (UMIDI20_WHAT_CHANNEL |
UMIDI20_WHAT_KEY |
UMIDI20_WHAT_VELOCITY);
case 0xA:
return (UMIDI20_WHAT_CHANNEL |
UMIDI20_WHAT_KEY |
UMIDI20_WHAT_KEY_PRESSURE);
case 0xB:
return (UMIDI20_WHAT_CHANNEL |
UMIDI20_WHAT_CONTROL_VALUE |
UMIDI20_WHAT_CONTROL_ADDRESS);
case 0xC:
return (UMIDI20_WHAT_CHANNEL |
UMIDI20_WHAT_PROGRAM_VALUE);
case 0xD:
return (UMIDI20_WHAT_CHANNEL |
UMIDI20_WHAT_CHANNEL_PRESSURE);
case 0xE:
return (UMIDI20_WHAT_CHANNEL |
UMIDI20_WHAT_PITCH_BEND);
case 0xF:
switch (event->cmd[1]) {
case 0xF8:
return (UMIDI20_WHAT_BEAT_EVENT);
case 0xF1:
case 0xF2:
case 0xF3:
case 0xFA:
case 0xFB:
case 0xFC:
return (UMIDI20_WHAT_SONG_EVENT);
case 0xF0: /* SYSEX */
if (umidi20_event_get_length(event) >= 11 &&
umidi20_event_pointer(event, 1)[0] == 0x0A &&
umidi20_event_pointer(event, 2)[0] == 0x55 &&
(umidi20_event_pointer(event, 3)[0] & 0xF0) == 0x00) {
return (UMIDI20_WHAT_CHANNEL |
UMIDI20_WHAT_KEY |
UMIDI20_WHAT_VELOCITY |
UMIDI20_WHAT_EXTENDED_KEY);
}
break;
default:
break;
}
break;
default:
break;
}
return 0;
}
uint8_t
umidi20_event_is_meta(struct umidi20_event *event)
{
return ((umidi20_event_get_length_first(event) > 1) &&
(event->cmd[1] == 0xFF));
}
uint8_t
umidi20_event_is_pitch_bend(struct umidi20_event *event)
{
if (event == NULL)
return 0;
return ((event->cmd[1] & 0xF0) == 0xE0);
}
uint8_t
umidi20_event_is_key_start(struct umidi20_event *event)
{
uint32_t what = umidi20_event_get_what(event);
if (what & UMIDI20_WHAT_KEY) {
if ((event->cmd[1] & 0xF0) == 0x80)
return (0);
if (what & UMIDI20_WHAT_VELOCITY) {
if (umidi20_event_get_velocity(event) != 0)
return (1);
}
}
return (0);
}
uint8_t
umidi20_event_is_key_end(struct umidi20_event *event)
{
uint32_t what = umidi20_event_get_what(event);
if (what & UMIDI20_WHAT_KEY) {
if ((event->cmd[1] & 0xF0) == 0x80)
return (1);
if (what & UMIDI20_WHAT_VELOCITY) {
if (umidi20_event_get_velocity(event) == 0)
return (1);
}
}
return (0);
}
uint8_t
umidi20_event_is_tempo(struct umidi20_event *event)
{
if (event == NULL)
return 0;
return ((event->cmd[1] == 0xFF) &&
(event->cmd[2] == 0x51));
}
uint8_t
umidi20_event_is_voice(struct umidi20_event *event)
{
if (event == NULL)
return 0;
return ((event->cmd[1] >= 0x80) &&
(event->cmd[1] <= 0xEF));
}
uint8_t
umidi20_event_is_sysex(struct umidi20_event *event)
{
if (event == NULL)
return 0;
return (event->cmd[1] == 0xF0);
}
uint8_t
umidi20_event_get_channel(struct umidi20_event *event)
{
uint32_t what = umidi20_event_get_what(event);
if (what & UMIDI20_WHAT_EXTENDED_KEY)
return (umidi20_event_pointer(event, 3)[0] & 0x0F);
else if (what & UMIDI20_WHAT_CHANNEL)
return (event->cmd[1] & 0x0F);
else
return (0);
}
void
umidi20_event_set_channel(struct umidi20_event *event, uint8_t c)
{
uint32_t what = umidi20_event_get_what(event);
if (what & UMIDI20_WHAT_EXTENDED_KEY) {
umidi20_event_pointer(event, 3)[0] &= 0xF0;
umidi20_event_pointer(event, 3)[0] |= (c & 0x0F);
} else if (what & UMIDI20_WHAT_CHANNEL) {
event->cmd[1] &= 0xF0;
event->cmd[1] |= (c & 0x0F);
}
}
uint8_t
umidi20_event_get_key(struct umidi20_event *event)
{