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midiconv.cpp
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// midiconv: converts MIDI files to Enterprise midiplay format
// Copyright (C) 2017-2018 Istvan Varga <[email protected]>
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cstdarg>
#include <vector>
#include <exception>
#include <stdexcept>
#include "comprlib.cpp"
#include "compress2.cpp"
#include "daveplay.cpp"
struct MIDIEvent {
static bool optimizeNoteEvents;
// --------
unsigned long t;
unsigned char st;
unsigned char d1;
unsigned char d2;
// --------
inline void setTempo(unsigned int n)
{
d2 = (unsigned char) (n & 0xFF);
d1 = (unsigned char) ((n >> 8) & 0xFF);
st = (unsigned char) ((n >> 16) & 0x7F);
}
inline bool isTempo() const
{
return (!(st & 0x80));
}
inline unsigned int getTempo() const
{
return (((unsigned int) (st & 0x7F) << 16)
| ((unsigned int) d1 << 8) | (unsigned int) d2);
}
inline int eventPriority() const
{
switch (st & 0xF0) {
case 0xF0:
return 1;
case 0x80:
return 2;
case 0x90:
return (d2 == 0 ? 2 : 6);
case 0xC0:
return 3;
case 0xB0:
return 4;
case 0xE0:
return 5;
case 0xA0:
case 0xD0:
return 7;
}
return 0;
}
inline bool operator<(const MIDIEvent& r) const
{
if (t != r.t)
return (t < r.t);
int p1 = eventPriority();
int p2 = r.eventPriority();
if ((p1 & 3) == 2 && (p2 & 3) == 2) {
if (((st ^ r.st) & 0x0F) == 0 && d1 == r.d1)
return (this < &r);
if (p1 == p2 && !optimizeNoteEvents) {
if (p1 == 2)
return ((st & 0x0F) > (r.st & 0x0F));
return ((st & 0x0F) < (r.st & 0x0F));
}
}
return (p1 < p2);
}
};
bool MIDIEvent::optimizeNoteEvents = false;
static void errorMessage(const char *fmt, ...)
{
char msgBuf[1024];
std::va_list ap;
va_start(ap, fmt);
std::vsnprintf(msgBuf, 1024, fmt, ap);
va_end(ap);
msgBuf[1023] = '\0';
throw std::runtime_error(std::string(msgBuf));
}
// ----------------------------------------------------------------------------
class File {
protected:
std::FILE *f;
public:
File(const char *fileName, const char *mode);
virtual ~File();
size_t size();
void readBlock(std::vector< unsigned char >& buf, size_t nBytes);
void writeBlock(const std::vector< unsigned char >& buf);
};
File::File(const char *fileName, const char *mode)
{
if (!fileName || *fileName == '\0')
errorMessage("invalid file name");
if (!mode || *mode == '\0')
errorMessage("invalid file open mode");
f = std::fopen(fileName, mode);
if (!f)
errorMessage("error opening \"%s\"", fileName);
}
File::~File()
{
std::fclose(f);
}
size_t File::size()
{
long curPos = std::ftell(f);
long fileSize = -1L;
if (curPos < 0L)
errorMessage("error seeking file");
if (std::fseek(f, 0L, SEEK_END) >= 0)
fileSize = std::ftell(f);
if (std::fseek(f, curPos, SEEK_SET) < 0)
fileSize = -1L;
if (fileSize < 0L)
errorMessage("error seeking file");
return size_t(fileSize);
}
void File::readBlock(std::vector< unsigned char >& buf, size_t nBytes)
{
buf.resize(buf.size() + nBytes);
if (std::fread(&(buf.front()) + (buf.size() - nBytes),
sizeof(unsigned char), nBytes, f) != nBytes) {
errorMessage("error reading input file");
}
}
void File::writeBlock(const std::vector< unsigned char >& buf)
{
if (buf.size() < 1)
return;
if (std::fwrite(&(buf.front()), sizeof(unsigned char), buf.size(), f)
!= buf.size() || std::fflush(f) != 0) {
errorMessage("error writing output file");
}
}
// ----------------------------------------------------------------------------
class Envelopes {
public:
static const size_t env_buf_size = 8192;
protected:
struct EnvelopeState {
unsigned int vol_l;
int vol_l_inc;
unsigned char vol_l_mult;
unsigned int vol_r;
int vol_r_inc;
unsigned char vol_r_mult;
int pb;
int pb_inc;
unsigned char dist;
unsigned char d;
};
std::vector< unsigned short > midi_pgm_layer2;
std::vector< unsigned short > midi_drum_layer2;
std::vector< unsigned short > pgm_env_offsets;
std::vector< unsigned short > drum_env_offsets;
std::vector< unsigned char > envelope_data;
std::vector< bool > pgm_used;
std::vector< bool > drum_used;
std::vector< unsigned char > midiChnProgram;
std::vector< unsigned char > midiProgramMap;
std::vector< unsigned char > file_buf;
size_t file_buf_pos;
EnvelopeState envState;
// --------
void stripSpace();
char readChar();
int readNumber();
void updateEnvelope();
void parseVolumeL();
void parseVolumeR();
void parsePitchBend(bool isDrum);
void parseInstrLayer2(int n);
void compileEnvelopes();
public:
Envelopes(const char *fileName);
virtual ~Envelopes();
void midiEvent(unsigned char st, unsigned char d1, unsigned char d2);
void optimizeData(bool renumberPgm = false);
void saveData(std::vector< unsigned char >& outBuf) const;
inline unsigned char mapMIDIProgram(unsigned char pgm) const
{
return midiProgramMap[pgm & 0x7F];
}
};
void Envelopes::stripSpace()
{
if (file_buf.size() < 1)
errorMessage("empty envelope file");
unsigned char *s = &(file_buf.front());
unsigned char *t = s;
size_t fsize = file_buf.size();
bool commentFlag = false;
for ( ; fsize != 0; fsize--, s++) {
unsigned char c = *s;
if (commentFlag && c != '\r' && c != '\n' && c != '\0')
continue;
commentFlag = false;
if (c <= (unsigned char) ' ')
continue;
if (c == '#') {
commentFlag = true;
continue;
}
*(t++) = c;
}
file_buf.resize(size_t((t + 1) - &(file_buf.front())));
file_buf[file_buf.size() - 1] = '\0';
file_buf_pos = 0;
}
char Envelopes::readChar()
{
char c = char(file_buf[file_buf_pos]);
if ((c >= '0' && c <= '9') || c == '+' || c == '-')
return '0';
if (c && (file_buf_pos + 1) < file_buf.size())
file_buf_pos++;
return c;
}
int Envelopes::readNumber()
{
int n;
bool isNegative = false;
char c;
c = char(file_buf[file_buf_pos]);
if (c == '+' || c == '-') {
isNegative = (c == '-');
file_buf_pos++;
c = char(file_buf[file_buf_pos]);
}
if (!c)
errorMessage("unexpected end of envelope file");
if (c < '0' || c > '9')
errorMessage("invalid number format in envelope file");
n = c - '0';
while (true) {
file_buf_pos++;
c = char(file_buf[file_buf_pos]);
if (c < '0' || c > '9')
break;
if (n >= 214748364)
errorMessage("integer out of range in envelope file");
n = n * 10 + (c - '0');
}
if (isNegative)
n = -n;
return n;
}
void Envelopes::updateEnvelope()
{
if (envelope_data.size() > (env_buf_size - 4))
errorMessage("envelope buffer overflow");
envelope_data.push_back((unsigned char) (envState.vol_l >> 8));
envelope_data.push_back((unsigned char) (envState.vol_r >> 8));
unsigned int pb = (unsigned int) envState.pb & 0x00FFFFFF;
envelope_data.push_back((unsigned char) ((pb >> 8) & 0xFF));
envelope_data.push_back(envState.dist | (unsigned char) ((pb >> 16) & 0x0F));
envState.d--;
envState.vol_l = envState.vol_l & 0x3FFF;
if (envState.vol_l_mult)
envState.vol_l = (envState.vol_l * envState.vol_l_mult + 64) >> 7;
else
envState.vol_l = envState.vol_l + envState.vol_l_inc;
if (envState.vol_l & 0x8000)
envState.vol_l = 0;
else if (envState.vol_l >= 0x4000)
envState.vol_l = 0x3FFF;
envState.vol_r = envState.vol_r & 0x3FFF;
if (envState.vol_r_mult)
envState.vol_r = (envState.vol_r * envState.vol_r_mult + 64) >> 7;
else
envState.vol_r = envState.vol_r + envState.vol_r_inc;
if (envState.vol_r & 0x8000)
envState.vol_r = 0;
else if (envState.vol_r >= 0x4000)
envState.vol_r = 0x3FFF;
envState.pb = envState.pb + envState.pb_inc;
}
void Envelopes::parseVolumeL()
{
int n;
char c = readChar();
bool multFlag = (c == '*');
if (multFlag)
c = readChar();
if (c != '0')
errorMessage("syntax error in envelope segment");
n = readNumber();
if (n < (multFlag ? 1 : 0) || n >= (multFlag ? 256 : 64))
errorMessage("invalid left volume in envelope file");
if (multFlag) {
envState.vol_l_mult = (unsigned char) n;
}
else {
envState.vol_l_mult = 0;
if (!envState.d) {
envState.vol_l = (envState.vol_l & 0xC000)
| ((unsigned int) n << 8) | 0x0080;
}
else {
n = ((n << 8) | 0x0080) - int(envState.vol_l & 0x3FFF);
if (n < 0)
n = n - (envState.d >> 1);
else
n = n + (envState.d >> 1);
envState.vol_l_inc = n / envState.d;
}
}
}
void Envelopes::parseVolumeR()
{
int n;
char c = readChar();
bool multFlag = (c == '*');
if (multFlag)
c = readChar();
if (c != '0')
errorMessage("syntax error in envelope segment");
n = readNumber();
if (n < (multFlag ? 1 : 0) || n >= (multFlag ? 256 : 64))
errorMessage("invalid right volume in envelope file");
if (multFlag) {
envState.vol_r_mult = (unsigned char) n;
}
else {
envState.vol_r_mult = 0;
if (!envState.d) {
envState.vol_r = ((unsigned int) n << 8) | 0x0080;
}
else {
n = ((n << 8) | 0x0080) - int(envState.vol_r & 0x3FFF);
if (n < 0)
n = n - (envState.d >> 1);
else
n = n + (envState.d >> 1);
envState.vol_r_inc = n / envState.d;
}
}
}
void Envelopes::parsePitchBend(bool isDrum)
{
int pb, n;
if (readChar() != '0')
errorMessage("syntax error in envelope segment");
n = readNumber();
if (n < -2048 || n > 2047 || (isDrum && n != 0))
errorMessage("invalid pitch bend in envelope file");
pb = (n << 8) | 0x0080;
envState.pb_inc = 0;
if (!envState.d) {
envState.pb = pb;
}
else if (pb != envState.pb) {
pb = pb - envState.pb;
if (pb < 0)
pb = pb - (envState.d >> 1);
else
pb = pb + (envState.d >> 1);
envState.pb_inc = pb / envState.d;
}
}
void Envelopes::parseInstrLayer2(int n)
{
int c, p;
if (readChar() != '0')
errorMessage("syntax error in envelope file");
c = readNumber();
if (c < -15 || c > 15)
errorMessage("invalid channel offset in envelope file");
if (readChar() != ',' || readChar() != '0')
errorMessage("syntax error in envelope file");
p = readNumber();
if (p < -127 || p > 127)
errorMessage("invalid pitch offset in envelope file");
if (n < 0)
midi_drum_layer2[-n] = (unsigned short) (((p & 0x7F) << 8) | (c & 0x0F));
else
midi_pgm_layer2[n] = (unsigned short) (((p & 0x7F) << 8) | (c & 0x0F));
}
void Envelopes::compileEnvelopes()
{
std::vector< int > instrList;
int n;
char c;
stripSpace();
file_buf_pos = 0;
for (size_t i = 0; i < 128; i++) {
pgm_env_offsets[i] = 0x8000;
drum_env_offsets[i] = 0x8000;
midi_pgm_layer2[i] = 0xFFFF;
midi_drum_layer2[i] = 0xFFFF;
}
envelope_data.clear();
while ((c = readChar()) != '\0') {
unsigned char envFlags = 0x20; // 0x20 = no sustain, 0x10 = release
bool isDrum = false;
instrList.clear();
while (true) {
n = readNumber();
if (n < -127 || n > 127)
errorMessage("invalid program number in envelope file");
if (instrList.size() > 0 && (n < 0) != isDrum)
errorMessage("instrument type error in envelope file");
isDrum = (n < 0);
c = readChar();
instrList.push_back(n);
{
size_t envPos = envelope_data.size() >> 1;
if (n == 9)
envPos |= 0x4000;
while ((c | 0x20) == 'p' || (c | 0x20) == 'd') {
if ((c | 0x20) == 'p')
envPos ^= 0x4000;
else
envFlags = 0x30;
c = readChar();
}
if (!isDrum)
pgm_env_offsets[n] = (unsigned short) envPos;
else
drum_env_offsets[-n] = (unsigned short) envPos;
}
if (c == ':') {
parseInstrLayer2(n);
c = readChar();
}
if (c == '{')
break;
if (c != ',')
errorMessage("syntax error in envelope file");
}
envState.vol_l = 0x0080;
envState.vol_l_inc = 0;
envState.vol_l_mult = 0;
envState.vol_r = 0x0080;
envState.vol_r_inc = 0;
envState.vol_r_mult = 0;
envState.pb = 0x0080;
envState.pb_inc = 0;
envState.dist = 0x00;
envState.d = 0;
while (true) {
if (envState.d) {
updateEnvelope();
continue;
}
c = readChar();
if (c == '}')
break;
// duration
if (readChar() != '0')
errorMessage("syntax error in envelope segment");
n = readNumber();
if (n < 0 || n > 255)
errorMessage("invalid envelope segment duration");
envState.d = (unsigned char) n;
if (c != '0' && (unsigned char) n) {
switch (c | 0x20) {
case 'l': // begin loop
if (envFlags != 0x20)
errorMessage("invalid loop in envelope file");
envState.vol_l |= 0x4000;
envFlags = 0x00;
c = '0';
break;
case 'r': // end loop, release
if (envFlags == 0x10)
errorMessage("invalid loop in envelope file");
envState.vol_l |= (envFlags ? 0xC000 : 0x8000);
envFlags = 0x10;
c = '0';
break;
case 's': // hold single frame, release
if (envFlags != 0x20)
errorMessage("invalid loop in envelope file");
// flags are not set for compatibility
envState.vol_l |= 0xC000;
c = '0';
break;
}
}
if (c != '0' || readChar() != ',')
errorMessage("syntax error in envelope segment");
parseVolumeL();
if (readChar() != ',')
errorMessage("syntax error in envelope segment");
parseVolumeR();
if (readChar() != ',')
errorMessage("syntax error in envelope segment");
parsePitchBend(isDrum);
// distortion
if (readChar() != ',')
errorMessage("syntax error in envelope segment");
if (readChar() != '0')
errorMessage("syntax error in envelope segment");
n = readNumber();
if (n < 0 || n > 255 || (n & (isDrum ? 0x00 : 0x0F)) != 0)
errorMessage("invalid distortion in envelope file");
envState.dist = (unsigned char) n;
if (readChar() != ';')
errorMessage("syntax error in envelope segment");
}
if (envelope_data.size() > (env_buf_size - 2))
errorMessage("envelope buffer overflow");
envelope_data.push_back(0x80);
envelope_data.push_back(!envFlags ? 0x00 : 0xFF);
for (size_t i = 0; i < instrList.size(); i++) {
n = instrList[i];
if (n >= 0)
pgm_env_offsets[n] |= ((unsigned short) envFlags << 8);
else
drum_env_offsets[-n] |= ((unsigned short) envFlags << 8);
}
}
}
Envelopes::Envelopes(const char *fileName)
: midi_pgm_layer2(128, 0xFFFF),
midi_drum_layer2(128, 0xFFFF),
pgm_env_offsets(128, 0x8000),
drum_env_offsets(128, 0x8000),
pgm_used(128, false),
drum_used(128, false),
midiChnProgram(16, 0),
midiProgramMap(128, 0),
file_buf_pos(0)
{
for (size_t i = 0; i < midiProgramMap.size(); i++)
midiProgramMap[i] = (unsigned char) i;
bool isBinary = false;
{
File f(fileName, "rb");
f.readBlock(file_buf, f.size());
bool haveNUL = false;
bool haveCRLF = false;
bool have8080 = false;
bool haveFFFF = false;
for (size_t i = 0; i < file_buf.size(); i++) {
switch (file_buf[i]) {
case '\0':
haveNUL = true;
break;
case '\n':
case '\r':
haveCRLF = true;
break;
case 0x80:
if ((i + 1) < file_buf.size() && file_buf[i + 1] == 0x80)
have8080 = true;
break;
case 0xFF:
if ((i + 1) < file_buf.size() && file_buf[i + 1] == 0xFF)
haveFFFF = true;
break;
}
}
isBinary =
(!haveCRLF || (int(haveNUL) + int(have8080) + int(haveFFFF)) >= 2);
if (isBinary && !haveFFFF)
errorMessage("invalid binary envelope file format");
}
if (isBinary) {
if (file_buf.size() < (1024 + 6) ||
file_buf.size() > (1024 + env_buf_size) || (file_buf.size() & 1) != 0) {
errorMessage("invalid binary envelope file size");
}
if (!(file_buf[file_buf.size() - 2] & 0x80))
errorMessage("invalid binary envelope file format");
for (size_t i = 1024; i < file_buf.size(); i++)
envelope_data.push_back(file_buf[i]);
for (size_t i = 0; i < 128; i++) {
midi_pgm_layer2[i] = (unsigned short) file_buf[i << 1]
| ((unsigned short) file_buf[(i << 1) + 1] << 8);
midi_drum_layer2[i] = (unsigned short) file_buf[(i << 1) + 256]
| ((unsigned short) file_buf[(i << 1) + 257] << 8);
pgm_env_offsets[i] = (unsigned short) file_buf[(i << 1) + 512]
| ((unsigned short) file_buf[(i << 1) + 513] << 8);
drum_env_offsets[i] = (unsigned short) file_buf[(i << 1) + 768]
| ((unsigned short) file_buf[(i << 1) + 769] << 8);
if ((midi_pgm_layer2[i] & 0xFF) == 0xFF)
midi_pgm_layer2[i] = 0xFFFF;
else
midi_pgm_layer2[i] = midi_pgm_layer2[i] & 0x7F0F;
if ((midi_drum_layer2[i] & 0xFF) == 0xFF)
midi_drum_layer2[i] = 0xFFFF;
else
midi_drum_layer2[i] = midi_drum_layer2[i] & 0x7F0F;
if (pgm_env_offsets[i] & 0x8000)
pgm_env_offsets[i] = 0x8000;
if (drum_env_offsets[i] & 0x8000)
drum_env_offsets[i] = 0x8000;
if (((pgm_env_offsets[i] & 0x0FFF) << 1) >= envelope_data.size() ||
((drum_env_offsets[i] & 0x0FFF) << 1) >= envelope_data.size()) {
errorMessage("invalid envelope data offset in binary file");
}
}
}
else {
compileEnvelopes();
}
}
Envelopes::~Envelopes()
{
}
void Envelopes::midiEvent(unsigned char st, unsigned char d1, unsigned char d2)
{
d1 = d1 & 0x7F;
d2 = d2 & 0x7F;
if ((st & 0xF0) == 0xC0) { // program change
midiChnProgram[st & 0x0F] = d1;
}
else if ((st & 0xF0) == 0x90) { // note on
if (!d2)
return;
unsigned short l2 = 0xFFFF;
unsigned char c = st & 0x0F;
bool isDrum = (c == 9);
if (!isDrum) {
unsigned char pgm = midiChnProgram[c];
pgm_used[pgm] = true;
l2 = midi_pgm_layer2[pgm];
}
else {
drum_used[d1] = true;
l2 = midi_drum_layer2[d1];
}
if ((l2 & 0xFF) != 0xFF) {
c = (c + (unsigned char) (l2 & 0xFF)) & 0x0F;
d1 = (d1 + (unsigned char) (l2 >> 8)) & 0x7F;
isDrum = (c == 9);
if (!isDrum)
pgm_used[midiChnProgram[c]] = true;
else
drum_used[d1] = true;
}
}
}
void Envelopes::optimizeData(bool renumberPgm)
{
std::vector< unsigned short > pgm_l2_new(128, 0xFFFF);
std::vector< unsigned short > drum_l2_new(128, 0xFFFF);
std::vector< unsigned short > pgm_env_new(128, 0x8000);
std::vector< unsigned short > drum_env_new(128, 0x8000);
std::vector< unsigned char > env_data_new;
unsigned char pgm = 0;
for (size_t i = 0; i < 128; i++) {
if (!pgm_used[i])
continue;
if (!renumberPgm)
pgm = i;
midiProgramMap[i] = pgm;
pgm_l2_new[pgm] = midi_pgm_layer2[i];
if (pgm_env_offsets[i] & 0x8000) {
pgm_env_new[pgm] = 0x8000;
pgm++;
continue;
}
bool foundMatch = false;
for (size_t j = 0; j < i; j++) {
if (pgm_used[j] &&
!((pgm_env_offsets[i] ^ pgm_env_offsets[j]) & 0x8FFF)) {
pgm_env_new[pgm] = (pgm_env_offsets[i] & 0xF000)
| (pgm_env_new[midiProgramMap[j]] & 0x0FFF);
foundMatch = true;
break;
}
}
if (foundMatch) {
pgm++;
continue;
}
pgm_env_new[pgm] = (pgm_env_offsets[i] & 0xF000)
| (unsigned short) (env_data_new.size() >> 1);
for (size_t j = (pgm_env_offsets[i] & 0x0FFF) << 1;
(j + 2) <= envelope_data.size();
j = j + 4) {
unsigned char b0 = envelope_data[j];
unsigned char b1 = envelope_data[j + 1];
env_data_new.push_back(b0);
env_data_new.push_back(b1);
if (((b0 & 0x80) != 0 && b1 == 0xFF) ||
((pgm_env_offsets[i] & 0x3000) == 0 && b0 == 0x80 && b1 == 0x00)) {
break;
}
if ((j + 2) < envelope_data.size())
env_data_new.push_back(envelope_data[j + 2]);
if ((j + 3) < envelope_data.size())
env_data_new.push_back(envelope_data[j + 3]);
}
pgm++;
}
for (size_t i = 0; i < 128; i++) {
if (!drum_used[i])
continue;
drum_l2_new[i] = midi_drum_layer2[i];
if (drum_env_offsets[i] & 0x8000) {
drum_env_new[i] = 0x8000;
continue;
}
bool foundMatch = false;
for (size_t j = 0; j < i; j++) {
if (drum_used[j] &&
!((drum_env_offsets[i] ^ drum_env_offsets[j]) & 0x8FFF)) {
drum_env_new[i] = (drum_env_offsets[i] & 0xF000)
| (drum_env_new[j] & 0x0FFF);
foundMatch = true;
break;
}
}
if (foundMatch)
continue;
drum_env_new[i] = (drum_env_offsets[i] & 0xF000)
| (unsigned short) (env_data_new.size() >> 1);
for (size_t j = (drum_env_offsets[i] & 0x0FFF) << 1;
(j + 2) <= envelope_data.size();
j = j + 4) {
unsigned char b0 = envelope_data[j];
unsigned char b1 = envelope_data[j + 1];
env_data_new.push_back(b0);
env_data_new.push_back(b1);
if (((b0 & 0x80) != 0 && b1 == 0xFF) ||
((drum_env_offsets[i] & 0x3000) == 0 && b0 == 0x80 && b1 == 0x00)) {
break;
}
if ((j + 2) < envelope_data.size())
env_data_new.push_back(envelope_data[j + 2]);
if ((j + 3) < envelope_data.size())
env_data_new.push_back(envelope_data[j + 3]);
}
}
midi_pgm_layer2.clear();
midi_pgm_layer2.insert(midi_pgm_layer2.end(),
pgm_l2_new.begin(), pgm_l2_new.end());
midi_drum_layer2.clear();
midi_drum_layer2.insert(midi_drum_layer2.end(),
drum_l2_new.begin(), drum_l2_new.end());
pgm_env_offsets.clear();
pgm_env_offsets.insert(pgm_env_offsets.end(),
pgm_env_new.begin(), pgm_env_new.end());
drum_env_offsets.clear();
drum_env_offsets.insert(drum_env_offsets.end(),
drum_env_new.begin(), drum_env_new.end());
envelope_data.clear();
envelope_data.insert(envelope_data.end(),
env_data_new.begin(), env_data_new.end());
}
void Envelopes::saveData(std::vector< unsigned char >& outBuf) const
{
for (size_t i = 0; i < midi_pgm_layer2.size(); i++) {
outBuf.push_back((unsigned char) (midi_pgm_layer2[i] & 0xFF));
outBuf.push_back((unsigned char) (midi_pgm_layer2[i] >> 8));
}
for (size_t i = 0; i < midi_drum_layer2.size(); i++) {
outBuf.push_back((unsigned char) (midi_drum_layer2[i] & 0xFF));
outBuf.push_back((unsigned char) (midi_drum_layer2[i] >> 8));
}
for (size_t i = 0; i < pgm_env_offsets.size(); i++) {
outBuf.push_back((unsigned char) (pgm_env_offsets[i] & 0xFF));
outBuf.push_back((unsigned char) (pgm_env_offsets[i] >> 8));
}
for (size_t i = 0; i < drum_env_offsets.size(); i++) {
outBuf.push_back((unsigned char) (drum_env_offsets[i] & 0xFF));
outBuf.push_back((unsigned char) (drum_env_offsets[i] >> 8));
}
for (size_t i = 0; i < envelope_data.size(); i++)
outBuf.push_back(envelope_data[i]);
}
// ----------------------------------------------------------------------------
class MIDIFile {
protected:
std::vector< MIDIEvent > evtBuf;
std::vector< unsigned char > buf;
size_t bufPos;
size_t nTracks;
size_t trackBytesLeft;
int dTime;
bool noTempo;
// --------
inline unsigned char readByte()
{
if (bufPos >= buf.size())
errorMessage("unexpected end of MIDI file");
if (trackBytesLeft < 1)
errorMessage("unexpected end of track in MIDI file");
unsigned char c = buf[bufPos];
bufPos++;
trackBytesLeft--;
return c;
}
inline unsigned int readUInt16()
{
unsigned int n = readByte();
n = (n << 8) | readByte();
return n;
}
inline unsigned int readUInt24()
{
unsigned int n = readByte();
n = (n << 8) | readByte();
n = (n << 8) | readByte();
return n;
}
inline unsigned int readUInt32()
{
unsigned int n = readByte();
n = (n << 8) | readByte();
n = (n << 8) | readByte();
n = (n << 8) | readByte();
return n;
}
inline unsigned int readUIntVLen()
{
unsigned int n = readByte();
if (n & 0x80) {
unsigned char c = readByte();
n = ((n & 0x7F) << 7) | (c & 0x7F);
if (c & 0x80) {
c = readByte();
n = (n << 7) | (c & 0x7F);
if (c & 0x80) {
c = readByte();
if (c & 0x80)
errorMessage("invalid MIDI file data");
n = (n << 7) | (c & 0x7F);
}
}
}
return n;
}
void sortEvents();
double calculateTickTime(unsigned int usPerBeat, double irqFreq,
int quantizeTPQN) const;
public:
MIDIFile(const char *fileName);
virtual ~MIDIFile();
void getRawData(std::vector< unsigned char >& outBuf,
double irqFreq, const Envelopes *env,
int roundingBias = 64, int quantizeTPQN = 0) const;
void getAllData(std::vector< unsigned char >& outBuf,
const char *envFile, double irqFreq,
bool renumberPgm = false, int roundingBias = 64,
int quantizeTPQN = 0) const;
};
void MIDIFile::sortEvents()
{
bool doneFlag;
do {
doneFlag = true;
for (size_t i = 0; (i + 1) < evtBuf.size(); i++) {
if (evtBuf[i] < evtBuf[i + 1])
continue;
if (!(evtBuf[i + 1] < evtBuf[i])) {
if (evtBuf[i].st == evtBuf[i + 1].st ||
(i > 0 && evtBuf[i - 1].st == evtBuf[i].st) ||
((i + 2) < evtBuf.size() && evtBuf[i + 1].st == evtBuf[i + 2].st)) {
continue;
}
if (!((i > 0 && evtBuf[i - 1].st == evtBuf[i + 1].st) ||
((i + 2) < evtBuf.size() && evtBuf[i].st == evtBuf[i + 2].st))) {
continue;
}
if (evtBuf[i].isTempo())
continue;
}
MIDIEvent tmp = evtBuf[i];
evtBuf[i] = evtBuf[i + 1];
evtBuf[i + 1] = tmp;
doneFlag = false;
}
} while (!doneFlag);
}
MIDIFile::MIDIFile(const char *fileName)
: bufPos(14),
trackBytesLeft(0x7FFFFFFF),
noTempo(false)
{
buf.clear();
File f(fileName, "rb");
f.readBlock(buf, f.size());
if (buf.size() < 24)
errorMessage("invalid input file \"%s\"", fileName);
if (buf[0] != 'M' || buf[1] != 'T' || buf[2] != 'h' || buf[3] != 'd' ||
buf[4] != 0x00 || buf[5] != 0x00 || buf[6] != 0x00 || buf[7] != 0x06 ||
buf[8] != 0x00 || (buf[9] & 0xFE) != 0x00) {
errorMessage("invalid input file format, must be MIDI file type 0 or 1");
}
if (!buf[11])
errorMessage("invalid time code in MIDI file");
nTracks = (size_t(buf[10]) << 8) | buf[11];
if (!nTracks)
errorMessage("invalid number of tracks in MIDI file");
dTime = (int(buf[12] & 0x7F) << 8) | buf[13];
MIDIEvent e;
e.t = 0UL;
e.setTempo(500000U); // default to 120 BPM
if (buf[12] & 0x80) {
dTime = dTime & 0xFF;
noTempo = true;
double t = double(256 - int(buf[12]));
if (buf[12] == 0xE3)
t = 29.97;
e.setTempo((unsigned int) int(1000000.0 / t + 0.5));
}
evtBuf.push_back(e);
for (size_t t = 0; t < nTracks; t++) {
trackBytesLeft = 8;
if (readUInt32() != 0x4D54726BU) // "MTrk"
errorMessage("invalid MIDI file track header (track %d)", int(t));
trackBytesLeft = size_t(readUInt32());
unsigned long curTime = 0UL;
unsigned char savedStatus = 0x00;
bool endOfTrack = false;
do {
unsigned int dt = readUIntVLen();
curTime = curTime + dt;
e.t = curTime;
unsigned char st = readByte();
if (st == 0xFF) { // meta events
st = readByte();
size_t evtBytes = size_t(readUIntVLen());
switch (st) {
case 0x2F: // end of track
endOfTrack = true;
break;
case 0x51: // set tempo
if (evtBytes != 3)
errorMessage("invalid tempo event in MIDI file track %d", int(t));
e.setTempo(readUInt24());
evtBytes = evtBytes - 3;
if (!noTempo)
evtBuf.push_back(e);
break;
}
for ( ; evtBytes > 0; evtBytes--)
(void) readByte();
}
else if (st >= 0xF0) {
savedStatus = 0x00;
if (st == 0xF0 || st == 0xF7) {
size_t evtBytes = size_t(readUIntVLen());
for ( ; evtBytes > 0; evtBytes--)
(void) readByte();
}
else {
errorMessage("invalid event data in MIDI file track %d", int(t));
}
}