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questzdoom/Projects/Android/jni/SupportLibs/fluidsynth/fluid_midi.c
Simon 4680b56dff Added SupportLibs
2021-04-20 21:09:02 +01:00

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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
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
* 02111-1307, USA
*/
#include "fluid_midi.h"
#include "fluid_sys.h"
#include "fluid_synth.h"
#include "fluid_settings.h"
/* all outgoing user messages are stored in a global text buffer */
#define MIDI_MESSAGE_LENGTH 1024
char midi_message_buffer[MIDI_MESSAGE_LENGTH];
/* Taken from Nagano Daisuke's USB-MIDI driver */
static int remains_f0f6[] = {
0, /** 0xF0 **/
2, /** 0XF1 **/
3, /** 0XF2 **/
2, /** 0XF3 **/
2, /** 0XF4 (Undefined by MIDI Spec, and subject to change) **/
2, /** 0XF5 (Undefined by MIDI Spec, and subject to change) **/
1 /** 0XF6 **/
};
static int remains_80e0[] = {
3, /** 0x8X Note Off **/
3, /** 0x9X Note On **/
3, /** 0xAX Poly-key pressure **/
3, /** 0xBX Control Change **/
2, /** 0xCX Program Change **/
2, /** 0xDX Channel pressure **/
3 /** 0xEX PitchBend Change **/
};
/***************************************************************
*
* MIDIFILE
*/
/**
* Open a MIDI file and return a new MIDI file handle.
* @internal
* @param filename Path of file to open.
* @return New MIDI file handle or NULL on error.
*/
fluid_midi_file* new_fluid_midi_file(char* filename)
{
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->fp = FLUID_FOPEN(filename, "rb");
if (mf->fp == NULL) {
FLUID_LOG(FLUID_ERR, "Couldn't open the MIDI file");
FLUID_FREE(mf);
return NULL;
}
if (fluid_midi_file_read_mthd(mf) != FLUID_OK) {
FLUID_FREE(mf);
return NULL;
}
return mf;
}
/**
* 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;
}
if (mf->fp != NULL) {
FLUID_FCLOSE(mf->fp);
}
FLUID_FREE(mf);
return;
}
/*
* Get the next byte in a MIDI file.
*/
int fluid_midi_file_getc(fluid_midi_file* mf)
{
unsigned char c;
int n;
if (mf->c >= 0) {
c = mf->c;
mf->c = -1;
} else {
n = FLUID_FREAD(&c, 1, 1, mf->fp);
mf->trackpos++;
}
return (int) c;
}
/*
* fluid_midi_file_push
*/
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 = FLUID_FREAD(buf, 1, len, mf->fp);
mf->trackpos += num;
#if DEBUG
if (num != len) {
FLUID_LOG(FLUID_DBG, "Coulnd't 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 err = FLUID_FSEEK(mf->fp, skip, SEEK_CUR);
if (err) {
FLUID_LOG(FLUID_ERR, "Failed to seek position in file");
return FLUID_FAILED;
}
return FLUID_OK;
}
/*
* 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, currupt 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) {
return FLUID_FAILED;
}
}
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 (feof(mf->fp)) {
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, sf, mi;
fluid_midi_event_t* evt;
int channel = 0;
int param1 = 0;
int param2 = 0;
/* 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 */
if (status & 0x80) {
mf->running_status = status;
if ((status == MIDI_SYSEX) || (status == MIDI_EOX)) { /* system exclusif */
/*
* Sysex messages are not handled yet
*/
/* read the length of the message */
if (fluid_midi_file_read_varlen(mf) != FLUID_OK) {
return FLUID_FAILED;
}
if (mf->varlen) {
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 of the message */
if (fluid_midi_file_read(mf, metadata, mf->varlen) != FLUID_OK) {
if (dyn_buf) {
FLUID_FREE(dyn_buf);
}
return FLUID_FAILED;
}
if (dyn_buf) {
FLUID_LOG(FLUID_DBG, "%s: %d: free metadata", __FILE__, __LINE__);
FLUID_FREE(dyn_buf);
}
}
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;
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;
}
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;
return evt;
}
/**
* Delete MIDI event structure.
* @param evt MIDI event structure
* @return Always returns 0
*/
int delete_fluid_midi_event(fluid_midi_event_t* evt)
{
fluid_midi_event_t *temp;
while (evt)
{
temp = evt->next;
FLUID_FREE(evt);
evt = temp;
}
return FLUID_OK;
}
/**
* Get the event type field of a MIDI event structure.
* DOCME - Event type enum appears to be internal (fluid_midi.h)
* @param evt MIDI event structure
* @return Event type field
*/
int fluid_midi_event_get_type(fluid_midi_event_t* evt)
{
return evt->type;
}
/**
* Set the event type field of a MIDI event structure.
* DOCME - Event type enum appears to be internal (fluid_midi.h)
* @param evt MIDI event structure
* @param type Event type field
* @return Always returns 0
*/
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 0
*/
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 0
*/
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 0
*/
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 0
*/
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 0
*/
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 0
*/
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 (DOCME units?)
*/
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 (DOCME units?)
* @return Always returns 0
*/
int fluid_midi_event_set_pitch(fluid_midi_event_t* evt, int val)
{
evt->param1 = val;
return FLUID_OK;
}
/*
* fluid_midi_event_get_param1
*/
/* int fluid_midi_event_get_param1(fluid_midi_event_t* evt) */
/* { */
/* return evt->param1; */
/* } */
/*
* fluid_midi_event_set_param1
*/
/* int fluid_midi_event_set_param1(fluid_midi_event_t* evt, int v) */
/* { */
/* evt->param1 = v; */
/* return FLUID_OK; */
/* } */
/*
* fluid_midi_event_get_param2
*/
/* int fluid_midi_event_get_param2(fluid_midi_event_t* evt) */
/* { */
/* return evt->param2; */
/* } */
/*
* fluid_midi_event_set_param2
*/
/* int fluid_midi_event_set_param2(fluid_midi_event_t* evt, int v) */
/* { */
/* evt->param2 = v; */
/* 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;
}
/*
* fluid_track_count_events
*/
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;
}
/*
* 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;
status = fluid_midi_send_event(synth, player, 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 = 0;
player->ntracks = 0;
for (i = 0; i < MAX_NUMBER_OF_TRACKS; i++) {
player->track[i] = NULL;
}
player->synth = synth;
player->timer = NULL;
player->playlist = NULL;
player->current_file = NULL;
player->division = 0;
player->send_program_change = 1;
player->miditempo = 480000;
player->deltatime = 4.0;
return player;
}
/**
* Delete a MIDI player instance.
* @param player MIDI player instance
* @return Always returns 0
*/
int delete_fluid_player(fluid_player_t* player)
{
if (player == NULL) {
return FLUID_OK;
}
fluid_player_stop(player);
fluid_player_reset(player);
FLUID_FREE(player);
return FLUID_OK;
}
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 = 0;
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;
}
}
int fluid_player_add(fluid_player_t* player, char* midifile)
{
char *s = FLUID_STRDUP(midifile);
player->playlist = fluid_list_append(player->playlist, s);
return 0;
}
/*
* fluid_player_load
*/
int fluid_player_load(fluid_player_t* player, char *filename)
{
fluid_midi_file* midifile;
midifile = new_fluid_midi_file(filename);
if (midifile == NULL) {
return FLUID_FAILED;
}
player->division = fluid_midi_file_get_division(midifile);
/*FLUID_LOG(FLUID_DBG, "quarter note division=%d\n", player->division); */
if (fluid_midi_file_load_tracks(midifile, player) != FLUID_OK){
return FLUID_FAILED;
}
delete_fluid_midi_file(midifile);
return FLUID_OK;
}
/*
* fluid_player_callback
*/
int fluid_player_callback(void* data, unsigned int msec)
{
int i;
int status = FLUID_PLAYER_DONE;
fluid_player_t* player;
fluid_synth_t* synth;
player = (fluid_player_t*) data;
synth = player->synth;
/* Load the next file if necessary */
while (player->current_file == NULL) {
if (player->playlist == NULL) {
return 0;
}
fluid_player_reset(player);
player->current_file = fluid_list_get(player->playlist);
player->playlist = fluid_list_next(player->playlist);
FLUID_LOG(FLUID_DBG, "%s: %d: Loading midifile %s", __FILE__, __LINE__, player->current_file);
if (fluid_player_load(player, player->current_file) == FLUID_OK) {
player->begin_msec = msec;
player->start_msec = msec;
player->start_ticks = 0;
player->cur_ticks = 0;
for (i = 0; i < player->ntracks; i++) {
if (player->track[i] != NULL) {
fluid_track_reset(player->track[i]);
}
}
} else {
player->current_file = NULL;
}
}
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) {
/* */
}
}
}
player->status = status;
if (player->status == FLUID_PLAYER_DONE) {
FLUID_LOG(FLUID_DBG, "%s: %d: Duration=%.3f sec",
__FILE__, __LINE__, (msec - player->begin_msec) / 1000.0);
player->current_file = NULL;
}
return 1;
}
/**
* Activates play mode for a MIDI player if not already playing.
* @param player MIDI player instance
* @return 0 on success, -1 on failure
*/
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;
player->timer = new_fluid_timer((int) player->deltatime, fluid_player_callback,
(void*) player, 1, 0);
if (player->timer == NULL) {
return FLUID_FAILED;
}
return FLUID_OK;
}
/**
* Stops a MIDI player.
* @param player MIDI player instance
* @return Always returns 0
*/
int fluid_player_stop(fluid_player_t* player)
{
if (player->timer != NULL) {
delete_fluid_timer(player->timer);
}
player->status = FLUID_PLAYER_DONE;
player->timer = NULL;
return FLUID_OK;
}
/* FIXME - Looping seems to not actually be implemented? */
/**
* Enable looping of a MIDI player (DOCME - Does this actually work?)
* @param player MIDI player instance
* @param loop Value for looping (DOCME - What would this value be, boolean/time index?)
* @return Always returns 0
*/
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 (DOCME - Units?)
* @return Always returns 0
*
*/
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 0
*/
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 0 on success, -1 otherwise
*
*/
int fluid_player_join(fluid_player_t* player)
{
return player->timer? fluid_timer_join(player->timer) : 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;
}
/*
* fluid_midi_parser_parse
*
* Purpose:
* The MIDI byte stream is fed into the parser, one byte at a time.
* As soon as the parser has recognized an event, it will return it.
* Otherwise it returns NULL.
*/
fluid_midi_event_t* fluid_midi_parser_parse(fluid_midi_parser_t* parser, unsigned char c)
{
/*********************************************************************/
/* 'Process' system real-time messages */
/*********************************************************************/
/* There are not too many real-time messages that are of interest here.
* They can occur anywhere, even in the middle of a noteon message!
* Real-time range: 0xF8 .. 0xFF
* Note: Real-time does not affect (running) status.
*/
if (c >= 0xF8){
if (c == MIDI_SYSTEM_RESET){
parser->event.type = c;
parser->status = 0; /* clear the status */
return &parser->event;
};
return NULL;
};
/*********************************************************************/
/* 'Process' system common messages (again, just skip them) */
/*********************************************************************/
/* There are no system common messages that are of interest here.
* System common range: 0xF0 .. 0xF7
*/
if (c > 0xF0){
/* MIDI specs say: To ignore a non-real-time message, just discard all data up to
* the next status byte.
* And our parser will ignore data that is received without a valid status.
* Note: system common cancels running status. */
parser->status = 0;
return NULL;
};
/*********************************************************************/
/* Process voice category messages: */
/*********************************************************************/
/* Now that we have handled realtime and system common messages, only
* voice messages are left.
* Only a status byte has bit # 7 set.
* So no matter the status of the parser (in case we have lost sync),
* as soon as a byte >= 0x80 comes in, we are dealing with a status byte
* and start a new event.
*/
if (c & 0x80){
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;
/* of which we have read 0 at this time. */
parser->nr_bytes = 0;
return NULL;
};
/*********************************************************************/
/* Process data */
/*********************************************************************/
/* If we made it this far, then the received char belongs to the data
* of the last event. */
if (parser->status == 0){
/* We are not interested in the event currently received.
* Discard the data. */
return NULL;
};
/* Store the first couple of bytes */
if (parser->nr_bytes < FLUID_MIDI_PARSER_MAX_PAR){
parser->p[parser->nr_bytes]=c;
};
parser->nr_bytes++;
/* Do we still need more data to get this event complete? */
if (parser->nr_bytes < parser->nr_bytes_total){
return NULL;
};
/*********************************************************************/
/* Send the event */
/*********************************************************************/
/* The event is ready-to-go.
* About 'running status':
* The MIDI protocol has a built-in compression mechanism. If several similar events are sent
* in-a-row, for example note-ons, then the event type is only sent once. For this case,
* the last event type (status) is remembered.
* We simply keep the status as it is, just reset
* the parameter counter. If another status byte comes in, it will overwrite the status. */
parser->event.type = parser->status;
parser->event.channel = parser->channel;
parser->nr_bytes = 0; /* Related to running status! */
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->p[0]; /* For example key number */
parser->event.param2 = parser->p[1]; /* For example velocity */
break;
case PITCH_BEND:
/* Pitch-bend is transmitted with 14-bit precision. */
parser->event.param1 = ((parser->p[1] << 7) | parser->p[0]); /* Note: '|' does here the same as '+' (no common bits), but might be faster */
break;
default:
/* Unlikely */
return NULL;
};
return &parser->event;
};
/* Purpose:
* Returns the length of the MIDI message starting with c.
* Taken from Nagano Daisuke's USB-MIDI driver */
int fluid_midi_event_length(unsigned char event){
if ( event < 0xf0 ) {
return remains_80e0[((event-0x80)>>4)&0x0f];
} else if ( event < 0xf7 ) {
return remains_f0f6[event-0xf0];
} else {
return 1;
}
}
/************************************************************************
* fluid_midi_send_event
*
* This is a utility function that doesn't really belong to any class
* or structure. It is called by fluid_midi_track and fluid_midi_device.
*/
int fluid_midi_send_event(fluid_synth_t* synth, fluid_player_t* player, fluid_midi_event_t* event)
{
switch (event->type) {
case NOTE_ON:
if (fluid_synth_noteon(synth, event->channel, event->param1, event->param2) != FLUID_OK) {
return FLUID_FAILED;
}
break;
case NOTE_OFF:
if (fluid_synth_noteoff(synth, event->channel, event->param1) != FLUID_OK) {
return FLUID_FAILED;
}
break;
case CONTROL_CHANGE:
if (fluid_synth_cc(synth, event->channel, event->param1, event->param2) != FLUID_OK) {
return FLUID_FAILED;
}
break;
case MIDI_SET_TEMPO:
if (player != NULL) {
if (fluid_player_set_midi_tempo(player, event->param1) != FLUID_OK) {
return FLUID_FAILED;
}
}
break;
case PROGRAM_CHANGE:
if (fluid_synth_program_change(synth, event->channel, event->param1) != FLUID_OK) {
return FLUID_FAILED;
}
break;
case PITCH_BEND:
if (fluid_synth_pitch_bend(synth, event->channel, event->param1) != FLUID_OK) {
return FLUID_FAILED;
}
break;
default:
break;
}
return FLUID_OK;
}
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