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ardour/libs/fluidsynth/src/fluid_midi.c

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/* FluidSynth - A Software Synthesizer
*
* Copyright (C) 2003 Peter Hanappe and others.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public License
* as published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA
*/
#include "fluid_midi.h"
#include "fluid_sys.h"
#include "fluid_synth.h"
#include "fluid_settings.h"
static int fluid_midi_event_length(unsigned char event);
/* Read the entire contents of a file into memory, allocating enough memory
* for the file, and returning the length and the buffer.
* Note: This rewinds the file to the start before reading.
* Returns NULL if there was an error reading or allocating memory.
*/
static char* fluid_file_read_full(fluid_file fp, size_t* length);
#define READ_FULL_INITIAL_BUFLEN 1024
/***************************************************************
*
* MIDIFILE
*/
/**
* Return a new MIDI file handle for parsing an already-loaded MIDI file.
* @internal
* @param buffer Pointer to full contents of MIDI file (borrows the pointer).
* The caller must not free buffer until after the fluid_midi_file is deleted.
* @param length Size of the buffer in bytes.
* @return New MIDI file handle or NULL on error.
*/
fluid_midi_file *
new_fluid_midi_file(const char* buffer, size_t length)
{
fluid_midi_file *mf;
mf = FLUID_NEW(fluid_midi_file);
if (mf == NULL) {
FLUID_LOG(FLUID_ERR, "Out of memory");
return NULL;
}
FLUID_MEMSET(mf, 0, sizeof(fluid_midi_file));
mf->c = -1;
mf->running_status = -1;
mf->buffer = buffer;
mf->buf_len = length;
mf->buf_pos = 0;
mf->eof = FALSE;
if (fluid_midi_file_read_mthd(mf) != FLUID_OK) {
FLUID_FREE(mf);
return NULL;
}
return mf;
}
static char*
fluid_file_read_full(fluid_file fp, size_t* length)
{
size_t buflen;
char* buffer;
size_t n;
/* Work out the length of the file in advance */
if (FLUID_FSEEK(fp, 0, SEEK_END) != 0)
{
FLUID_LOG(FLUID_ERR, "File load: Could not seek within file");
return NULL;
}
buflen = ftell(fp);
if (FLUID_FSEEK(fp, 0, SEEK_SET) != 0)
{
FLUID_LOG(FLUID_ERR, "File load: Could not seek within file");
return NULL;
}
FLUID_LOG(FLUID_DBG, "File load: Allocating %d bytes", buflen);
buffer = FLUID_MALLOC(buflen);
if (buffer == NULL) {
FLUID_LOG(FLUID_PANIC, "Out of memory");
return NULL;
}
n = FLUID_FREAD(buffer, 1, buflen, fp);
if (n != buflen) {
FLUID_LOG(FLUID_ERR, "Only read %d bytes; expected %d", n,
buflen);
FLUID_FREE(buffer);
return NULL;
};
*length = n;
return buffer;
}
/**
* Delete a MIDI file handle.
* @internal
* @param mf MIDI file handle to close and free.
*/
void
delete_fluid_midi_file (fluid_midi_file *mf)
{
if (mf == NULL) {
return;
}
FLUID_FREE(mf);
return;
}
/*
* Gets the next byte in a MIDI file, taking into account previous running status.
*
* returns FLUID_FAILED if EOF or read error
*/
int
fluid_midi_file_getc (fluid_midi_file *mf)
{
unsigned char c;
if (mf->c >= 0) {
c = mf->c;
mf->c = -1;
} else {
if (mf->buf_pos >= mf->buf_len) {
mf->eof = TRUE;
return FLUID_FAILED;
}
c = mf->buffer[mf->buf_pos++];
mf->trackpos++;
}
return (int) c;
}
/*
* Saves a byte to be returned the next time fluid_midi_file_getc() is called,
* when it is necessary according to running status.
*/
int
fluid_midi_file_push(fluid_midi_file *mf, int c)
{
mf->c = c;
return FLUID_OK;
}
/*
* fluid_midi_file_read
*/
int
fluid_midi_file_read(fluid_midi_file *mf, void *buf, int len)
{
int num = len < mf->buf_len - mf->buf_pos
? len : mf->buf_len - mf->buf_pos;
if (num != len) {
mf->eof = TRUE;
}
if (num < 0) {
num = 0;
}
/* Note: Read bytes, even if there aren't enough, but only increment
* trackpos if successful (emulates old behaviour of fluid_midi_file_read)
*/
FLUID_MEMCPY(buf, mf->buffer+mf->buf_pos, num);
mf->buf_pos += num;
if (num == len)
mf->trackpos += num;
#if DEBUG
else
FLUID_LOG(FLUID_DBG, "Could not read the requested number of bytes");
#endif
return (num != len) ? FLUID_FAILED : FLUID_OK;
}
/*
* fluid_midi_file_skip
*/
int
fluid_midi_file_skip (fluid_midi_file *mf, int skip)
{
int new_pos = mf->buf_pos + skip;
/* Mimic the behaviour of fseek: Error to seek past the start of file, but
* OK to seek past end (this just puts it into the EOF state). */
if (new_pos < 0) {
FLUID_LOG(FLUID_ERR, "Failed to seek position in file");
return FLUID_FAILED;
}
/* Clear the EOF flag, even if moved past the end of the file (this is
* consistent with the behaviour of fseek). */
mf->eof = FALSE;
mf->buf_pos = new_pos;
return FLUID_OK;
}
/*
* fluid_midi_file_eof
*/
int fluid_midi_file_eof(fluid_midi_file* mf)
{
/* Note: This does not simply test whether the file read pointer is past
* the end of the file. It mimics the behaviour of feof by actually
* testing the stateful EOF condition, which is set to TRUE if getc or
* fread have attempted to read past the end (but not if they have
* precisely reached the end), but reset to FALSE upon a successful seek.
*/
return mf->eof;
}
/*
* fluid_midi_file_read_mthd
*/
int
fluid_midi_file_read_mthd(fluid_midi_file *mf)
{
char mthd[15];
if (fluid_midi_file_read(mf, mthd, 14) != FLUID_OK) {
return FLUID_FAILED;
}
if ((FLUID_STRNCMP(mthd, "MThd", 4) != 0) || (mthd[7] != 6)
|| (mthd[9] > 2)) {
FLUID_LOG(FLUID_ERR,
"Doesn't look like a MIDI file: invalid MThd header");
return FLUID_FAILED;
}
mf->type = mthd[9];
mf->ntracks = (unsigned) mthd[11];
mf->ntracks += (unsigned int) (mthd[10]) << 16;
if ((mthd[12]) < 0) {
mf->uses_smpte = 1;
mf->smpte_fps = -mthd[12];
mf->smpte_res = (unsigned) mthd[13];
FLUID_LOG(FLUID_ERR, "File uses SMPTE timing -- Not implemented yet");
return FLUID_FAILED;
} else {
mf->uses_smpte = 0;
mf->division = (mthd[12] << 8) | (mthd[13] & 0xff);
FLUID_LOG(FLUID_DBG, "Division=%d", mf->division);
}
return FLUID_OK;
}
/*
* fluid_midi_file_load_tracks
*/
int
fluid_midi_file_load_tracks(fluid_midi_file *mf, fluid_player_t *player)
{
int i;
for (i = 0; i < mf->ntracks; i++) {
if (fluid_midi_file_read_track(mf, player, i) != FLUID_OK) {
return FLUID_FAILED;
}
}
return FLUID_OK;
}
/*
* fluid_isasciistring
*/
int
fluid_isasciistring(char *s)
{
int i;
int len = (int) FLUID_STRLEN(s);
for (i = 0; i < len; i++) {
if (!fluid_isascii(s[i])) {
return 0;
}
}
return 1;
}
/*
* fluid_getlength
*/
long
fluid_getlength(unsigned char *s)
{
long i = 0;
i = s[3] | (s[2] << 8) | (s[1] << 16) | (s[0] << 24);
return i;
}
/*
* fluid_midi_file_read_tracklen
*/
int
fluid_midi_file_read_tracklen(fluid_midi_file *mf)
{
unsigned char length[5];
if (fluid_midi_file_read(mf, length, 4) != FLUID_OK) {
return FLUID_FAILED;
}
mf->tracklen = fluid_getlength(length);
mf->trackpos = 0;
mf->eot = 0;
return FLUID_OK;
}
/*
* fluid_midi_file_eot
*/
int
fluid_midi_file_eot(fluid_midi_file *mf)
{
#if DEBUG
if (mf->trackpos > mf->tracklen) {
printf("track overrun: %d > %d\n", mf->trackpos, mf->tracklen);
}
#endif
return mf->eot || (mf->trackpos >= mf->tracklen);
}
/*
* fluid_midi_file_read_track
*/
int
fluid_midi_file_read_track(fluid_midi_file *mf, fluid_player_t *player, int num)
{
fluid_track_t *track;
unsigned char id[5], length[5];
int found_track = 0;
int skip;
if (fluid_midi_file_read(mf, id, 4) != FLUID_OK) {
return FLUID_FAILED;
}
id[4] = '\0';
mf->dtime = 0;
while (!found_track) {
if (fluid_isasciistring((char *) id) == 0) {
FLUID_LOG(FLUID_ERR,
"An non-ascii track header found, corrupt file");
return FLUID_FAILED;
} else if (strcmp((char *) id, "MTrk") == 0) {
found_track = 1;
if (fluid_midi_file_read_tracklen(mf) != FLUID_OK) {
return FLUID_FAILED;
}
track = new_fluid_track(num);
if (track == NULL) {
FLUID_LOG(FLUID_ERR, "Out of memory");
return FLUID_FAILED;
}
while (!fluid_midi_file_eot(mf)) {
if (fluid_midi_file_read_event(mf, track) != FLUID_OK) {
delete_fluid_track(track);
return FLUID_FAILED;
}
}
/* Skip remaining track data, if any */
if (mf->trackpos < mf->tracklen)
fluid_midi_file_skip(mf, mf->tracklen - mf->trackpos);
fluid_player_add_track(player, track);
} else {
found_track = 0;
if (fluid_midi_file_read(mf, length, 4) != FLUID_OK) {
return FLUID_FAILED;
}
skip = fluid_getlength(length);
/* fseek(mf->fp, skip, SEEK_CUR); */
if (fluid_midi_file_skip(mf, skip) != FLUID_OK) {
return FLUID_FAILED;
}
}
}
if (fluid_midi_file_eof(mf)) {
FLUID_LOG(FLUID_ERR, "Unexpected end of file");
return FLUID_FAILED;
}
return FLUID_OK;
}
/*
* fluid_midi_file_read_varlen
*/
int
fluid_midi_file_read_varlen(fluid_midi_file *mf)
{
int i;
int c;
mf->varlen = 0;
for (i = 0;; i++) {
if (i == 4) {
FLUID_LOG(FLUID_ERR, "Invalid variable length number");
return FLUID_FAILED;
}
c = fluid_midi_file_getc(mf);
if (c < 0) {
FLUID_LOG(FLUID_ERR, "Unexpected end of file");
return FLUID_FAILED;
}
if (c & 0x80) {
mf->varlen |= (int) (c & 0x7F);
mf->varlen <<= 7;
} else {
mf->varlen += c;
break;
}
}
return FLUID_OK;
}
/*
* fluid_midi_file_read_event
*/
int
fluid_midi_file_read_event(fluid_midi_file *mf, fluid_track_t *track)
{
int status;
int type;
int tempo;
unsigned char *metadata = NULL;
unsigned char *dyn_buf = NULL;
unsigned char static_buf[256];
int nominator, denominator, clocks, notes;
fluid_midi_event_t *evt;
int channel = 0;
int param1 = 0;
int param2 = 0;
int size;
/* read the delta-time of the event */
if (fluid_midi_file_read_varlen(mf) != FLUID_OK) {
return FLUID_FAILED;
}
mf->dtime += mf->varlen;
/* read the status byte */
status = fluid_midi_file_getc(mf);
if (status < 0) {
FLUID_LOG(FLUID_ERR, "Unexpected end of file");
return FLUID_FAILED;
}
/* not a valid status byte: use the running status instead */
if ((status & 0x80) == 0) {
if ((mf->running_status & 0x80) == 0) {
FLUID_LOG(FLUID_ERR, "Undefined status and invalid running status");
return FLUID_FAILED;
}
fluid_midi_file_push(mf, status);
status = mf->running_status;
}
/* check what message we have */
mf->running_status = status;
if ((status == MIDI_SYSEX)) { /* system exclusif */
/* read the length of the message */
if (fluid_midi_file_read_varlen(mf) != FLUID_OK) {
return FLUID_FAILED;
}
if (mf->varlen) {
FLUID_LOG(FLUID_DBG, "%s: %d: alloc metadata, len = %d", __FILE__,
__LINE__, mf->varlen);
metadata = FLUID_MALLOC(mf->varlen + 1);
if (metadata == NULL) {
FLUID_LOG(FLUID_PANIC, "Out of memory");
return FLUID_FAILED;
}
/* read the data of the message */
if (fluid_midi_file_read(mf, metadata, mf->varlen) != FLUID_OK) {
FLUID_FREE (metadata);
return FLUID_FAILED;
}
evt = new_fluid_midi_event();
if (evt == NULL) {
FLUID_LOG(FLUID_ERR, "Out of memory");
FLUID_FREE (metadata);
return FLUID_FAILED;
}
evt->dtime = mf->dtime;
size = mf->varlen;
if (metadata[mf->varlen - 1] == MIDI_EOX)
size--;
/* Add SYSEX event and indicate that its dynamically allocated and should be freed with event */
fluid_midi_event_set_sysex(evt, metadata, size, TRUE);
fluid_track_add_event(track, evt);
mf->dtime = 0;
}
return FLUID_OK;
} else if (status == MIDI_META_EVENT) { /* meta events */
int result = FLUID_OK;
/* get the type of the meta message */
type = fluid_midi_file_getc(mf);
if (type < 0) {
FLUID_LOG(FLUID_ERR, "Unexpected end of file");
return FLUID_FAILED;
}
/* get the length of the data part */
if (fluid_midi_file_read_varlen(mf) != FLUID_OK) {
return FLUID_FAILED;
}
if (mf->varlen < 255) {
metadata = &static_buf[0];
} else {
FLUID_LOG(FLUID_DBG, "%s: %d: alloc metadata, len = %d", __FILE__,
__LINE__, mf->varlen);
dyn_buf = FLUID_MALLOC(mf->varlen + 1);
if (dyn_buf == NULL) {
FLUID_LOG(FLUID_PANIC, "Out of memory");
return FLUID_FAILED;
}
metadata = dyn_buf;
}
/* read the data */
if (mf->varlen) {
if (fluid_midi_file_read(mf, metadata, mf->varlen) != FLUID_OK) {
if (dyn_buf) {
FLUID_FREE(dyn_buf);
}
return FLUID_FAILED;
}
}
/* handle meta data */
switch (type) {
case MIDI_COPYRIGHT:
metadata[mf->varlen] = 0;
break;
case MIDI_TRACK_NAME:
metadata[mf->varlen] = 0;
fluid_track_set_name(track, (char *) metadata);
break;
case MIDI_INST_NAME:
metadata[mf->varlen] = 0;
break;
case MIDI_LYRIC:
break;
case MIDI_MARKER:
break;
case MIDI_CUE_POINT:
break; /* don't care much for text events */
case MIDI_EOT:
if (mf->varlen != 0) {
FLUID_LOG(FLUID_ERR, "Invalid length for EndOfTrack event");
result = FLUID_FAILED;
break;
}
mf->eot = 1;
evt = new_fluid_midi_event();
if (evt == NULL) {
FLUID_LOG(FLUID_ERR, "Out of memory");
result = FLUID_FAILED;
break;
}
evt->dtime = mf->dtime;
evt->type = MIDI_EOT;
fluid_track_add_event(track, evt);
mf->dtime = 0;
break;
case MIDI_SET_TEMPO:
if (mf->varlen != 3) {
FLUID_LOG(FLUID_ERR,
"Invalid length for SetTempo meta event");
result = FLUID_FAILED;
break;
}
tempo = (metadata[0] << 16) + (metadata[1] << 8) + metadata[2];
evt = new_fluid_midi_event();
if (evt == NULL) {
FLUID_LOG(FLUID_ERR, "Out of memory");
result = FLUID_FAILED;
break;
}
evt->dtime = mf->dtime;
evt->type = MIDI_SET_TEMPO;
evt->channel = 0;
evt->param1 = tempo;
evt->param2 = 0;
fluid_track_add_event(track, evt);
mf->dtime = 0;
break;
case MIDI_SMPTE_OFFSET:
if (mf->varlen != 5) {
FLUID_LOG(FLUID_ERR,
"Invalid length for SMPTE Offset meta event");
result = FLUID_FAILED;
break;
}
break; /* we don't use smtp */
case MIDI_TIME_SIGNATURE:
if (mf->varlen != 4) {
FLUID_LOG(FLUID_ERR,
"Invalid length for TimeSignature meta event");
result = FLUID_FAILED;
break;
}
nominator = metadata[0];
denominator = pow(2.0, (double) metadata[1]);
clocks = metadata[2];
notes = metadata[3];
FLUID_LOG(FLUID_DBG,
"signature=%d/%d, metronome=%d, 32nd-notes=%d",
nominator, denominator, clocks, notes);
break;
case MIDI_KEY_SIGNATURE:
if (mf->varlen != 2) {
FLUID_LOG(FLUID_ERR,
"Invalid length for KeySignature meta event");
result = FLUID_FAILED;
break;
}
/* We don't care about key signatures anyway */
/* sf = metadata[0];
mi = metadata[1]; */
break;
case MIDI_SEQUENCER_EVENT:
break;
default:
break;
}
if (dyn_buf) {
FLUID_LOG(FLUID_DBG, "%s: %d: free metadata", __FILE__, __LINE__);
FLUID_FREE(dyn_buf);
}
return result;
} else { /* channel messages */
type = status & 0xf0;
channel = status & 0x0f;
/* all channel message have at least 1 byte of associated data */
if ((param1 = fluid_midi_file_getc(mf)) < 0) {
FLUID_LOG(FLUID_ERR, "Unexpected end of file");
return FLUID_FAILED;
}
switch (type) {
case NOTE_ON:
if ((param2 = fluid_midi_file_getc(mf)) < 0) {
FLUID_LOG(FLUID_ERR, "Unexpected end of file");
return FLUID_FAILED;
}
break;
case NOTE_OFF:
if ((param2 = fluid_midi_file_getc(mf)) < 0) {
FLUID_LOG(FLUID_ERR, "Unexpected end of file");
return FLUID_FAILED;
}
break;
case KEY_PRESSURE:
if ((param2 = fluid_midi_file_getc(mf)) < 0) {
FLUID_LOG(FLUID_ERR, "Unexpected end of file");
return FLUID_FAILED;
}
break;
case CONTROL_CHANGE:
if ((param2 = fluid_midi_file_getc(mf)) < 0) {
FLUID_LOG(FLUID_ERR, "Unexpected end of file");
return FLUID_FAILED;
}
break;
case PROGRAM_CHANGE:
break;
case CHANNEL_PRESSURE:
break;
case PITCH_BEND:
if ((param2 = fluid_midi_file_getc(mf)) < 0) {
FLUID_LOG(FLUID_ERR, "Unexpected end of file");
return FLUID_FAILED;
}
param1 = ((param2 & 0x7f) << 7) | (param1 & 0x7f);
param2 = 0;
break;
default:
/* Can't possibly happen !? */
FLUID_LOG(FLUID_ERR, "Unrecognized MIDI event");
return FLUID_FAILED;
}
evt = new_fluid_midi_event();
if (evt == NULL) {
FLUID_LOG(FLUID_ERR, "Out of memory");
return FLUID_FAILED;
}
evt->dtime = mf->dtime;
evt->type = type;
evt->channel = channel;
evt->param1 = param1;
evt->param2 = param2;
fluid_track_add_event(track, evt);
mf->dtime = 0;
}
return FLUID_OK;
}
/*
* fluid_midi_file_get_division
*/
int
fluid_midi_file_get_division(fluid_midi_file *midifile)
{
return midifile->division;
}
/******************************************************
*
* fluid_track_t
*/
/**
* Create a MIDI event structure.
* @return New MIDI event structure or NULL when out of memory.
*/
fluid_midi_event_t *
new_fluid_midi_event ()
{
fluid_midi_event_t* evt;
evt = FLUID_NEW(fluid_midi_event_t);
if (evt == NULL) {
FLUID_LOG(FLUID_ERR, "Out of memory");
return NULL;
}
evt->dtime = 0;
evt->type = 0;
evt->channel = 0;
evt->param1 = 0;
evt->param2 = 0;
evt->next = NULL;
evt->paramptr = NULL;
return evt;
}
/**
* Delete MIDI event structure.
* @param evt MIDI event structure
* @return Always returns #FLUID_OK
*/
int
delete_fluid_midi_event(fluid_midi_event_t *evt)
{
fluid_midi_event_t *temp;
while (evt) {
temp = evt->next;
/* Dynamic SYSEX event? - free (param2 indicates if dynamic) */
if (evt->type == MIDI_SYSEX && evt->paramptr && evt->param2)
FLUID_FREE (evt->paramptr);
FLUID_FREE(evt);
evt = temp;
}
return FLUID_OK;
}
/**
* Get the event type field of a MIDI event structure.
* @param evt MIDI event structure
* @return Event type field (MIDI status byte without channel)
*/
int
fluid_midi_event_get_type(fluid_midi_event_t *evt)
{
return evt->type;
}
/**
* Set the event type field of a MIDI event structure.
* @param evt MIDI event structure
* @param type Event type field (MIDI status byte without channel)
* @return Always returns #FLUID_OK
*/
int
fluid_midi_event_set_type(fluid_midi_event_t *evt, int type)
{
evt->type = type;
return FLUID_OK;
}
/**
* Get the channel field of a MIDI event structure.
* @param evt MIDI event structure
* @return Channel field
*/
int
fluid_midi_event_get_channel(fluid_midi_event_t *evt)
{
return evt->channel;
}
/**
* Set the channel field of a MIDI event structure.
* @param evt MIDI event structure
* @param chan MIDI channel field
* @return Always returns #FLUID_OK
*/
int
fluid_midi_event_set_channel(fluid_midi_event_t *evt, int chan)
{
evt->channel = chan;
return FLUID_OK;
}
/**
* Get the key field of a MIDI event structure.
* @param evt MIDI event structure
* @return MIDI note number (0-127)
*/
int
fluid_midi_event_get_key(fluid_midi_event_t *evt)
{
return evt->param1;
}
/**
* Set the key field of a MIDI event structure.
* @param evt MIDI event structure
* @param v MIDI note number (0-127)
* @return Always returns #FLUID_OK
*/
int
fluid_midi_event_set_key(fluid_midi_event_t *evt, int v)
{
evt->param1 = v;
return FLUID_OK;
}
/**
* Get the velocity field of a MIDI event structure.
* @param evt MIDI event structure
* @return MIDI velocity number (0-127)
*/
int
fluid_midi_event_get_velocity(fluid_midi_event_t *evt)
{
return evt->param2;
}
/**
* Set the velocity field of a MIDI event structure.
* @param evt MIDI event structure
* @param v MIDI velocity value
* @return Always returns #FLUID_OK
*/
int
fluid_midi_event_set_velocity(fluid_midi_event_t *evt, int v)
{
evt->param2 = v;
return FLUID_OK;
}
/**
* Get the control number of a MIDI event structure.
* @param evt MIDI event structure
* @return MIDI control number
*/
int
fluid_midi_event_get_control(fluid_midi_event_t *evt)
{
return evt->param1;
}
/**
* Set the control field of a MIDI event structure.
* @param evt MIDI event structure
* @param v MIDI control number
* @return Always returns #FLUID_OK
*/
int
fluid_midi_event_set_control(fluid_midi_event_t *evt, int v)
{
evt->param1 = v;
return FLUID_OK;
}
/**
* Get the value field from a MIDI event structure.
* @param evt MIDI event structure
* @return Value field
*/
int
fluid_midi_event_get_value(fluid_midi_event_t *evt)
{
return evt->param2;
}
/**
* Set the value field of a MIDI event structure.
* @param evt MIDI event structure
* @param v Value to assign
* @return Always returns #FLUID_OK
*/
int
fluid_midi_event_set_value(fluid_midi_event_t *evt, int v)
{
evt->param2 = v;
return FLUID_OK;
}
/**
* Get the program field of a MIDI event structure.
* @param evt MIDI event structure
* @return MIDI program number (0-127)
*/
int
fluid_midi_event_get_program(fluid_midi_event_t *evt)
{
return evt->param1;
}
/**
* Set the program field of a MIDI event structure.
* @param evt MIDI event structure
* @param val MIDI program number (0-127)
* @return Always returns #FLUID_OK
*/
int
fluid_midi_event_set_program(fluid_midi_event_t *evt, int val)
{
evt->param1 = val;
return FLUID_OK;
}
/**
* Get the pitch field of a MIDI event structure.
* @param evt MIDI event structure
* @return Pitch value (14 bit value, 0-16383, 8192 is center)
*/
int
fluid_midi_event_get_pitch(fluid_midi_event_t *evt)
{
return evt->param1;
}
/**
* Set the pitch field of a MIDI event structure.
* @param evt MIDI event structure
* @param val Pitch value (14 bit value, 0-16383, 8192 is center)
* @return Always returns FLUID_OK
*/
int
fluid_midi_event_set_pitch(fluid_midi_event_t *evt, int val)
{
evt->param1 = val;
return FLUID_OK;
}
/**
* Assign sysex data to a MIDI event structure.
* @param evt MIDI event structure
* @param data Pointer to SYSEX data
* @param size Size of SYSEX data
* @param dynamic TRUE if the SYSEX data has been dynamically allocated and
* should be freed when the event is freed (only applies if event gets destroyed
* with delete_fluid_midi_event())
* @return Always returns #FLUID_OK
*
* NOTE: Unlike the other event assignment functions, this one sets evt->type.
*/
int
fluid_midi_event_set_sysex(fluid_midi_event_t *evt, void *data, int size, int dynamic)
{
evt->type = MIDI_SYSEX;
evt->paramptr = data;
evt->param1 = size;
evt->param2 = dynamic;
return FLUID_OK;
}
/******************************************************
*
* fluid_track_t
*/
/*
* new_fluid_track
*/
fluid_track_t *
new_fluid_track(int num)
{
fluid_track_t *track;
track = FLUID_NEW(fluid_track_t);
if (track == NULL) {
return NULL;
}
track->name = NULL;
track->num = num;
track->first = NULL;
track->cur = NULL;
track->last = NULL;
track->ticks = 0;
return track;
}
/*
* delete_fluid_track
*/
int
delete_fluid_track(fluid_track_t *track)
{
if (track->name != NULL) {
FLUID_FREE(track->name);
}
if (track->first != NULL) {
delete_fluid_midi_event(track->first);
}
FLUID_FREE(track);
return FLUID_OK;
}
/*
* fluid_track_set_name
*/
int
fluid_track_set_name(fluid_track_t *track, char *name)
{
int len;
if (track->name != NULL) {
FLUID_FREE(track->name);
}
if (name == NULL) {
track->name = NULL;
return FLUID_OK;
}
len = FLUID_STRLEN(name);
track->name = FLUID_MALLOC(len + 1);
if (track->name == NULL) {
FLUID_LOG(FLUID_ERR, "Out of memory");
return FLUID_FAILED;
}
FLUID_STRCPY(track->name, name);
return FLUID_OK;
}
/*
* fluid_track_get_name
*/
char *
fluid_track_get_name(fluid_track_t *track)
{
return track->name;
}
/*
* fluid_track_get_duration
*/
int
fluid_track_get_duration(fluid_track_t *track)
{
int time = 0;
fluid_midi_event_t *evt = track->first;
while (evt != NULL) {
time += evt->dtime;
evt = evt->next;
}
return time;
}
#if 0
/*
* fluid_track_count_events
*/
static int
fluid_track_count_events(fluid_track_t *track, int *on, int *off)
{
fluid_midi_event_t *evt = track->first;
while (evt != NULL) {
if (evt->type == NOTE_ON) {
(*on)++;
} else if (evt->type == NOTE_OFF) {
(*off)++;
}
evt = evt->next;
}
return FLUID_OK;
}
#endif
/*
* fluid_track_add_event
*/
int
fluid_track_add_event(fluid_track_t *track, fluid_midi_event_t *evt)
{
evt->next = NULL;
if (track->first == NULL) {
track->first = evt;
track->cur = evt;
track->last = evt;
} else {
track->last->next = evt;
track->last = evt;
}
return FLUID_OK;
}
/*
* fluid_track_first_event
*/
fluid_midi_event_t *
fluid_track_first_event(fluid_track_t *track)
{
track->cur = track->first;
return track->cur;
}
/*
* fluid_track_next_event
*/
fluid_midi_event_t *
fluid_track_next_event(fluid_track_t *track)
{
if (track->cur != NULL) {
track->cur = track->cur->next;
}
return track->cur;
}
/*
* fluid_track_reset
*/
int
fluid_track_reset(fluid_track_t *track)
{
track->ticks = 0;
track->cur = track->first;
return FLUID_OK;
}
/*
* fluid_track_send_events
*/
int
fluid_track_send_events(fluid_track_t *track,
fluid_synth_t *synth,
fluid_player_t *player,
unsigned int ticks)
{
int status = FLUID_OK;
fluid_midi_event_t *event;
while (1) {
event = track->cur;
if (event == NULL) {
return status;
}
/* printf("track=%02d\tticks=%05u\ttrack=%05u\tdtime=%05u\tnext=%05u\n", */
/* track->num, */
/* ticks, */
/* track->ticks, */
/* event->dtime, */
/* track->ticks + event->dtime); */
if (track->ticks + event->dtime > ticks) {
return status;
}
track->ticks += event->dtime;
if (!player || event->type == MIDI_EOT) {
}
else if (event->type == MIDI_SET_TEMPO) {
fluid_player_set_midi_tempo(player, event->param1);
}
else {
if (player->playback_callback)
player->playback_callback(player->playback_userdata, event);
}
fluid_track_next_event(track);
}
return status;
}
/******************************************************
*
* fluid_player
*/
/**
* Create a new MIDI player.
* @param synth Fluid synthesizer instance to create player for
* @return New MIDI player instance or NULL on error (out of memory)
*/
fluid_player_t *
new_fluid_player(fluid_synth_t *synth)
{
int i;
fluid_player_t *player;
player = FLUID_NEW(fluid_player_t);
if (player == NULL) {
FLUID_LOG(FLUID_ERR, "Out of memory");
return NULL;
}
player->status = FLUID_PLAYER_READY;
player->loop = 1;
player->ntracks = 0;
for (i = 0; i < MAX_NUMBER_OF_TRACKS; i++) {
player->track[i] = NULL;
}
player->synth = synth;
player->system_timer = NULL;
player->sample_timer = NULL;
player->playlist = NULL;
player->currentfile = NULL;
player->division = 0;
player->send_program_change = 1;
player->miditempo = 480000;
player->deltatime = 4.0;
player->cur_msec = 0;
player->cur_ticks = 0;
fluid_player_set_playback_callback(player, fluid_synth_handle_midi_event, synth);
player->use_system_timer = fluid_settings_str_equal(synth->settings,
"player.timing-source", "system");
fluid_settings_getint(synth->settings, "player.reset-synth", &i);
player->reset_synth_between_songs = i;
return player;
}
/**
* Delete a MIDI player instance.
* @param player MIDI player instance
* @return Always returns #FLUID_OK
*/
int
delete_fluid_player(fluid_player_t *player)
{
fluid_list_t *q;
fluid_playlist_item* pi;
if (player == NULL) {
return FLUID_OK;
}
fluid_player_stop(player);
fluid_player_reset(player);
while (player->playlist != NULL) {
q = player->playlist->next;
pi = (fluid_playlist_item*) player->playlist->data;
FLUID_FREE(pi->filename);
FLUID_FREE(pi->buffer);
FLUID_FREE(pi);
delete1_fluid_list(player->playlist);
player->playlist = q;
}
FLUID_FREE(player);
return FLUID_OK;
}
/**
* Registers settings related to the MIDI player
*/
void
fluid_player_settings(fluid_settings_t *settings)
{
/* player.timing-source can be either "system" (use system timer)
or "sample" (use timer based on number of written samples) */
fluid_settings_register_str(settings, "player.timing-source", "sample", 0,
NULL, NULL);
fluid_settings_add_option(settings, "player.timing-source", "sample");
fluid_settings_add_option(settings, "player.timing-source", "system");
/* Selects whether the player should reset the synth between songs, or not. */
fluid_settings_register_int(settings, "player.reset-synth", 1, 0, 1,
FLUID_HINT_TOGGLED, NULL, NULL);
}
int
fluid_player_reset(fluid_player_t *player)
{
int i;
for (i = 0; i < MAX_NUMBER_OF_TRACKS; i++) {
if (player->track[i] != NULL) {
delete_fluid_track(player->track[i]);
player->track[i] = NULL;
}
}
/* player->current_file = NULL; */
/* player->status = FLUID_PLAYER_READY; */
/* player->loop = 1; */
player->ntracks = 0;
player->division = 0;
player->send_program_change = 1;
player->miditempo = 480000;
player->deltatime = 4.0;
return 0;
}
/*
* fluid_player_add_track
*/
int
fluid_player_add_track(fluid_player_t *player, fluid_track_t *track)
{
if (player->ntracks < MAX_NUMBER_OF_TRACKS) {
player->track[player->ntracks++] = track;
return FLUID_OK;
} else {
return FLUID_FAILED;
}
}
/*
* fluid_player_count_tracks
*/
int
fluid_player_count_tracks(fluid_player_t *player)
{
return player->ntracks;
}
/*
* fluid_player_get_track
*/
fluid_track_t *
fluid_player_get_track(fluid_player_t *player, int i)
{
if ((i >= 0) && (i < MAX_NUMBER_OF_TRACKS)) {
return player->track[i];
} else {
return NULL;
}
}
/**
* Change the MIDI callback function. This is usually set to
* fluid_synth_handle_midi_event, but can optionally be changed
* to a user-defined function instead, for intercepting all MIDI
* messages sent to the synth. You can also use a midi router as
* the callback function to modify the MIDI messages before sending
* them to the synth.
* @param player MIDI player instance
* @param handler Pointer to callback function
* @param handler_data Parameter sent to the callback function
* @returns FLUID_OK
* @since 1.1.4
*/
int
fluid_player_set_playback_callback(fluid_player_t* player,
handle_midi_event_func_t handler, void* handler_data)
{
player->playback_callback = handler;
player->playback_userdata = handler_data;
return FLUID_OK;
}
/**
* Add a MIDI file to a player queue.
* @param player MIDI player instance
* @param midifile File name of the MIDI file to add
* @return #FLUID_OK or #FLUID_FAILED
*/
int
fluid_player_add(fluid_player_t *player, const char *midifile)
{
fluid_playlist_item *pi = FLUID_MALLOC(sizeof(fluid_playlist_item));
char* f = FLUID_STRDUP(midifile);
if (!pi || !f) {
FLUID_FREE(pi);
FLUID_FREE(f);
FLUID_LOG(FLUID_PANIC, "Out of memory");
return FLUID_FAILED;
}
pi->filename = f;
pi->buffer = NULL;
pi->buffer_len = 0;
player->playlist = fluid_list_append(player->playlist, pi);
return FLUID_OK;
}
/**
* Add a MIDI file to a player queue, from a buffer in memory.
* @param player MIDI player instance
* @param buffer Pointer to memory containing the bytes of a complete MIDI
* file. The data is copied, so the caller may free or modify it immediately
* without affecting the playlist.
* @param len Length of the buffer, in bytes.
* @return #FLUID_OK or #FLUID_FAILED
*/
int
fluid_player_add_mem(fluid_player_t* player, const void *buffer, size_t len)
{
/* Take a copy of the buffer, so the caller can free immediately. */
fluid_playlist_item *pi = FLUID_MALLOC(sizeof(fluid_playlist_item));
void *buf_copy = FLUID_MALLOC(len);
if (!pi || !buf_copy) {
FLUID_FREE(pi);
FLUID_FREE(buf_copy);
FLUID_LOG(FLUID_PANIC, "Out of memory");
return FLUID_FAILED;
}
FLUID_MEMCPY(buf_copy, buffer, len);
pi->filename = NULL;
pi->buffer = buf_copy;
pi->buffer_len = len;
player->playlist = fluid_list_append(player->playlist, pi);
return FLUID_OK;
}
/*
* fluid_player_load
*/
int
fluid_player_load(fluid_player_t *player, fluid_playlist_item *item)
{
fluid_midi_file *midifile;
char* buffer;
size_t buffer_length;
int buffer_owned;
if (item->filename != NULL)
{
fluid_file fp;
/* This file is specified by filename; load the file from disk */
FLUID_LOG(FLUID_DBG, "%s: %d: Loading midifile %s", __FILE__, __LINE__,
item->filename);
/* Read the entire contents of the file into the buffer */
fp = FLUID_FOPEN(item->filename, "rb");
if (fp == NULL) {
FLUID_LOG(FLUID_ERR, "Couldn't open the MIDI file");
return FLUID_FAILED;
}
buffer = fluid_file_read_full(fp, &buffer_length);
if (buffer == NULL)
{
FLUID_FCLOSE(fp);
return FLUID_FAILED;
}
buffer_owned = 1;
FLUID_FCLOSE(fp);
}
else
{
/* This file is specified by a pre-loaded buffer; load from memory */
FLUID_LOG(FLUID_DBG, "%s: %d: Loading midifile from memory (%p)",
__FILE__, __LINE__, item->buffer);
buffer = (char *) item->buffer;
buffer_length = item->buffer_len;
/* Do not free the buffer (it is owned by the playlist) */
buffer_owned = 0;
}
midifile = new_fluid_midi_file(buffer, buffer_length);
if (midifile == NULL) {
if (buffer_owned) {
FLUID_FREE(buffer);
}
return FLUID_FAILED;
}
player->division = fluid_midi_file_get_division(midifile);
fluid_player_set_midi_tempo(player, player->miditempo); // Update deltatime
/*FLUID_LOG(FLUID_DBG, "quarter note division=%d\n", player->division); */
if (fluid_midi_file_load_tracks(midifile, player) != FLUID_OK) {
if (buffer_owned) {
FLUID_FREE(buffer);
}
delete_fluid_midi_file(midifile);
return FLUID_FAILED;
}
delete_fluid_midi_file(midifile);
if (buffer_owned) {
FLUID_FREE(buffer);
}
return FLUID_OK;
}
static void
fluid_player_advancefile(fluid_player_t *player)
{
if (player->playlist == NULL) {
return; /* No files to play */
}
if (player->currentfile != NULL) {
player->currentfile = fluid_list_next(player->currentfile);
}
if (player->currentfile == NULL) {
if (player->loop == 0) {
return; /* We're done playing */
}
if (player->loop > 0) {
player->loop--;
}
player->currentfile = player->playlist;
}
}
static void
fluid_player_playlist_load(fluid_player_t *player, unsigned int msec)
{
fluid_playlist_item* current_playitem;
int i;
do {
fluid_player_advancefile(player);
if (player->currentfile == NULL) {
/* Failed to find next song, probably since we're finished */
player->status = FLUID_PLAYER_DONE;
return;
}
fluid_player_reset(player);
current_playitem = (fluid_playlist_item *) player->currentfile->data;
} while (fluid_player_load(player, current_playitem) != FLUID_OK);
/* Successfully loaded midi file */
player->begin_msec = msec;
player->start_msec = msec;
player->start_ticks = 0;
player->cur_ticks = 0;
if (player->reset_synth_between_songs) {
fluid_synth_system_reset(player->synth);
}
for (i = 0; i < player->ntracks; i++) {
if (player->track[i] != NULL) {
fluid_track_reset(player->track[i]);
}
}
}
/*
* fluid_player_callback
*/
int
fluid_player_callback(void *data, unsigned int msec)
{
int i;
int loadnextfile;
int status = FLUID_PLAYER_DONE;
fluid_player_t *player;
fluid_synth_t *synth;
player = (fluid_player_t *) data;
synth = player->synth;
loadnextfile = player->currentfile == NULL ? 1 : 0;
do {
if (loadnextfile) {
loadnextfile = 0;
fluid_player_playlist_load(player, msec);
if (player->currentfile == NULL) {
return 0;
}
}
player->cur_msec = msec;
player->cur_ticks = (player->start_ticks
+ (int) ((double) (player->cur_msec - player->start_msec)
/ player->deltatime));
for (i = 0; i < player->ntracks; i++) {
if (!fluid_track_eot(player->track[i])) {
status = FLUID_PLAYER_PLAYING;
if (fluid_track_send_events(player->track[i], synth, player,
player->cur_ticks) != FLUID_OK) {
/* */
}
}
}
if (status == FLUID_PLAYER_DONE) {
FLUID_LOG(FLUID_DBG, "%s: %d: Duration=%.3f sec", __FILE__,
__LINE__, (msec - player->begin_msec) / 1000.0);
loadnextfile = 1;
}
} while (loadnextfile);
player->status = status;
return 1;
}
/**
* Activates play mode for a MIDI player if not already playing.
* @param player MIDI player instance
* @return #FLUID_OK on success, #FLUID_FAILED otherwise
*/
int
fluid_player_play(fluid_player_t *player)
{
if (player->status == FLUID_PLAYER_PLAYING) {
return FLUID_OK;
}
if (player->playlist == NULL) {
return FLUID_OK;
}
player->status = FLUID_PLAYER_PLAYING;
if (player->use_system_timer) {
player->system_timer = new_fluid_timer((int) player->deltatime,
fluid_player_callback, (void *) player, TRUE, FALSE, TRUE);
if (player->system_timer == NULL) {
return FLUID_FAILED;
}
} else {
player->sample_timer = new_fluid_sample_timer(player->synth,
fluid_player_callback, (void *) player);
if (player->sample_timer == NULL) {
return FLUID_FAILED;
}
}
return FLUID_OK;
}
/**
* Stops a MIDI player.
* @param player MIDI player instance
* @return Always returns #FLUID_OK
*/
int
fluid_player_stop(fluid_player_t *player)
{
if (player->system_timer != NULL) {
delete_fluid_timer(player->system_timer);
}
if (player->sample_timer != NULL) {
delete_fluid_sample_timer(player->synth, player->sample_timer);
}
player->status = FLUID_PLAYER_DONE;
player->sample_timer = NULL;
player->system_timer = NULL;
return FLUID_OK;
}
/**
* Get MIDI player status.
* @param player MIDI player instance
* @return Player status (#fluid_player_status)
* @since 1.1.0
*/
int
fluid_player_get_status(fluid_player_t *player)
{
return player->status;
}
/**
* Enable looping of a MIDI player
* @param player MIDI player instance
* @param loop Times left to loop the playlist. -1 means loop infinitely.
* @return Always returns #FLUID_OK
* @since 1.1.0
*
* For example, if you want to loop the playlist twice, set loop to 2
* and call this function before you start the player.
*/
int fluid_player_set_loop(fluid_player_t *player, int loop)
{
player->loop = loop;
return FLUID_OK;
}
/**
* Set the tempo of a MIDI player.
* @param player MIDI player instance
* @param tempo Tempo to set playback speed to (in microseconds per quarter note, as per MIDI file spec)
* @return Always returns #FLUID_OK
*/
int fluid_player_set_midi_tempo(fluid_player_t *player, int tempo)
{
player->miditempo = tempo;
player->deltatime = (double) tempo / player->division / 1000.0; /* in milliseconds */
player->start_msec = player->cur_msec;
player->start_ticks = player->cur_ticks;
FLUID_LOG(FLUID_DBG,
"tempo=%d, tick time=%f msec, cur time=%d msec, cur tick=%d",
tempo, player->deltatime, player->cur_msec, player->cur_ticks);
return FLUID_OK;
}
/**
* Set the tempo of a MIDI player in beats per minute.
* @param player MIDI player instance
* @param bpm Tempo in beats per minute
* @return Always returns #FLUID_OK
*/
int
fluid_player_set_bpm(fluid_player_t *player, int bpm)
{
return fluid_player_set_midi_tempo(player, (int) ((double) 60 * 1e6 / bpm));
}
/**
* Wait for a MIDI player to terminate (when done playing).
* @param player MIDI player instance
* @return #FLUID_OK on success, #FLUID_FAILED otherwise
*/
int
fluid_player_join(fluid_player_t *player)
{
if (player->system_timer) {
return fluid_timer_join(player->system_timer);
} else if (player->sample_timer) {
/* Busy-wait loop, since there's no thread to wait for... */
while (player->status != FLUID_PLAYER_DONE) {
#if defined(WIN32)
Sleep(10);
#else
usleep(10000);
#endif
}
}
return FLUID_OK;
}
/************************************************************************
* MIDI PARSER
*
*/
/*
* new_fluid_midi_parser
*/
fluid_midi_parser_t *
new_fluid_midi_parser ()
{
fluid_midi_parser_t *parser;
parser = FLUID_NEW(fluid_midi_parser_t);
if (parser == NULL) {
FLUID_LOG(FLUID_ERR, "Out of memory");
return NULL;
}
parser->status = 0; /* As long as the status is 0, the parser won't do anything -> no need to initialize all the fields. */
return parser;
}
/*
* delete_fluid_midi_parser
*/
int
delete_fluid_midi_parser(fluid_midi_parser_t *parser)
{
FLUID_FREE(parser);
return FLUID_OK;
}
/**
* Parse a MIDI stream one character at a time.
* @param parser Parser instance
* @param c Next character in MIDI stream
* @return A parsed MIDI event or NULL if none. Event is internal and should
* not be modified or freed and is only valid until next call to this function.
*/
fluid_midi_event_t *
fluid_midi_parser_parse(fluid_midi_parser_t *parser, unsigned char c)
{
fluid_midi_event_t *event;
/* Real-time messages (0xF8-0xFF) can occur anywhere, even in the middle
* of another message. */
if (c >= 0xF8) {
if (c == MIDI_SYSTEM_RESET) {
parser->event.type = c;
parser->status = 0; /* clear the status */
return &parser->event;
}
return NULL;
}
/* Status byte? - If previous message not yet complete, it is discarded (re-sync). */
if (c & 0x80) {
/* Any status byte terminates SYSEX messages (not just 0xF7) */
if (parser->status == MIDI_SYSEX && parser->nr_bytes > 0) {
event = &parser->event;
fluid_midi_event_set_sysex(event, parser->data, parser->nr_bytes,
FALSE);
} else
event = NULL;
if (c < 0xF0) /* Voice category message? */
{
parser->channel = c & 0x0F;
parser->status = c & 0xF0;
/* The event consumes x bytes of data... (subtract 1 for the status byte) */
parser->nr_bytes_total = fluid_midi_event_length(parser->status)
- 1;
parser->nr_bytes = 0; /* 0 bytes read so far */
} else if (c == MIDI_SYSEX) {
parser->status = MIDI_SYSEX;
parser->nr_bytes = 0;
} else
parser->status = 0; /* Discard other system messages (0xF1-0xF7) */
return event; /* Return SYSEX event or NULL */
}
/* Data/parameter byte */
/* Discard data bytes for events we don't care about */
if (parser->status == 0)
return NULL;
/* Max data size exceeded? (SYSEX messages only really) */
if (parser->nr_bytes == FLUID_MIDI_PARSER_MAX_DATA_SIZE) {
parser->status = 0; /* Discard the rest of the message */
return NULL;
}
/* Store next byte */
parser->data[parser->nr_bytes++] = c;
/* Do we still need more data to get this event complete? */
if (parser->nr_bytes < parser->nr_bytes_total)
return NULL;
/* Event is complete, return it.
* Running status byte MIDI feature is also handled here. */
parser->event.type = parser->status;
parser->event.channel = parser->channel;
parser->nr_bytes = 0; /* Reset data size, in case there are additional running status messages */
switch (parser->status) {
case NOTE_OFF:
case NOTE_ON:
case KEY_PRESSURE:
case CONTROL_CHANGE:
case PROGRAM_CHANGE:
case CHANNEL_PRESSURE:
parser->event.param1 = parser->data[0]; /* For example key number */
parser->event.param2 = parser->data[1]; /* For example velocity */
break;
case PITCH_BEND:
/* Pitch-bend is transmitted with 14-bit precision. */
parser->event.param1 = (parser->data[1] << 7) | parser->data[0];
break;
default: /* Unlikely */
return NULL;
}
return &parser->event;
}
/* Purpose:
* Returns the length of a MIDI message. */
static int
fluid_midi_event_length(unsigned char event)
{
switch (event & 0xF0) {
case NOTE_OFF:
case NOTE_ON:
case KEY_PRESSURE:
case CONTROL_CHANGE:
case PITCH_BEND:
return 3;
case PROGRAM_CHANGE:
case CHANNEL_PRESSURE:
return 2;
}
switch (event) {
case MIDI_TIME_CODE:
case MIDI_SONG_SELECT:
case 0xF4:
case 0xF5:
return 2;
case MIDI_TUNE_REQUEST:
return 1;
case MIDI_SONG_POSITION:
return 3;
}
return 1;
}
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