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ptfformat.cc
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/*
* libptformat - a library to read ProTools sessions
*
* Copyright (C) 2015 Damien Zammit
* Copyright (C) 2015 Robin Gareus
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser 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 <stdio.h>
#include <stdlib.h>
#include <string>
#include <string.h>
#include <assert.h>
#include <glib/gstdio.h>
#include "ptfformat.h"
#if 0
#define verbose_printf(...) printf(__VA_ARGS__)
#else
#define verbose_printf(...)
#endif
using namespace std;
static bool wavidx_compare(PTFFormat::wav_t& w1, PTFFormat::wav_t& w2) {
return w1.index < w2.index;
}
static bool wavname_compare(PTFFormat::wav_t& w1, PTFFormat::wav_t& w2) {
return (strcasecmp(w1.filename.c_str(), w2.filename.c_str()) < 0);
}
static bool regidx_compare(PTFFormat::region_t& r1, PTFFormat::region_t& r2) {
return r1.index < r2.index;
}
static bool regname_compare(PTFFormat::region_t& r1, PTFFormat::region_t& r2) {
return (strcasecmp(r1.name.c_str(), r2.name.c_str()) < 0);
}
static void
hexdump(uint8_t *data, int len)
{
int i,j,end,step=16;
for (i = 0; i < len; i += step) {
printf("0x%02X: ", i);
end = i + step;
if (end > len) end = len;
for (j = i; j < end; j++) {
printf("0x%02X ", data[j]);
}
for (j = i; j < end; j++) {
if (data[j] < 128 && data[j] > 32)
printf("%c", data[j]);
else
printf(".");
}
printf("\n");
}
}
PTFFormat::PTFFormat() : version(0), product(NULL) {
}
PTFFormat::~PTFFormat() {
if (ptfunxored) {
free(ptfunxored);
}
}
int64_t
PTFFormat::foundat(unsigned char *haystack, uint64_t n, const char *needle) {
int64_t found = 0;
uint64_t i, j, needle_n;
needle_n = strlen(needle);
for (i = 0; i < n; i++) {
found = i;
for (j = 0; j < needle_n; j++) {
if (haystack[i+j] != needle[j]) {
found = -1;
break;
}
}
if (found > 0)
return found;
}
return -1;
}
bool
PTFFormat::jumpto(uint32_t *currpos, unsigned char *buf, const uint32_t maxoffset, const unsigned char *needle, const uint32_t needlelen) {
uint64_t i;
uint64_t k = *currpos;
while (k + needlelen < maxoffset) {
bool foundall = true;
for (i = 0; i < needlelen; i++) {
if (buf[k+i] != needle[i]) {
foundall = false;
break;
}
}
if (foundall) {
*currpos = k;
return true;
}
k++;
}
return false;
}
bool
PTFFormat::jumpback(uint32_t *currpos, unsigned char *buf, const uint32_t maxoffset, const unsigned char *needle, const uint32_t needlelen) {
uint64_t i;
uint64_t k = *currpos;
while (k > 0 && k + needlelen < maxoffset) {
bool foundall = true;
for (i = 0; i < needlelen; i++) {
if (buf[k+i] != needle[i]) {
foundall = false;
break;
}
}
if (foundall) {
*currpos = k;
return true;
}
k--;
}
return false;
}
bool
PTFFormat::foundin(std::string haystack, std::string needle) {
size_t found = haystack.find(needle);
if (found != std::string::npos) {
return true;
} else {
return false;
}
}
/* Return values: 0 success
-1 could not decrypt pt session
*/
int
PTFFormat::unxor(std::string path) {
FILE *fp;
unsigned char xxor[256];
unsigned char ct;
uint64_t i;
uint8_t xor_type;
uint8_t xor_value;
uint8_t xor_delta;
uint16_t xor_len;
if (! (fp = g_fopen(path.c_str(), "rb"))) {
return -1;
}
fseek(fp, 0, SEEK_END);
len = ftell(fp);
if (len < 0x14) {
fclose(fp);
return -1;
}
if (! (ptfunxored = (unsigned char*) malloc(len * sizeof(unsigned char)))) {
/* Silently fail -- out of memory*/
fclose(fp);
ptfunxored = 0;
return -1;
}
/* The first 20 bytes are always unencrypted */
fseek(fp, 0x00, SEEK_SET);
i = fread(ptfunxored, 1, 0x14, fp);
if (i < 0x14) {
fclose(fp);
return -1;
}
xor_type = ptfunxored[0x12];
xor_value = ptfunxored[0x13];
xor_len = 256;
// xor_type 0x01 = ProTools 5, 6, 7, 8 and 9
// xor_type 0x05 = ProTools 10, 11, 12
switch(xor_type) {
case 0x01:
xor_delta = gen_xor_delta(xor_value, 53, false);
break;
case 0x05:
xor_delta = gen_xor_delta(xor_value, 11, true);
break;
default:
fclose(fp);
return -1;
}
/* Generate the xor_key */
for (i=0; i < xor_len; i++)
xxor[i] = (i * xor_delta) & 0xff;
/* hexdump(xxor, xor_len); */
/* Read file and decrypt rest of file */
i = 0x14;
fseek(fp, i, SEEK_SET);
while (fread(&ct, 1, 1, fp) != 0) {
uint8_t xor_index = (xor_type == 0x01) ? i & 0xff : (i >> 12) & 0xff;
ptfunxored[i++] = ct ^ xxor[xor_index];
}
fclose(fp);
return 0;
}
/* Return values: 0 success
-1 could not parse pt session
*/
int
PTFFormat::load(std::string path, int64_t targetsr) {
if (unxor(path))
return -1;
if (parse_version())
return -1;
if (version < 5 || version > 12)
return -1;
targetrate = targetsr;
if (parse())
return -1;
return 0;
}
bool
PTFFormat::parse_version() {
uint32_t seg_len,str_len;
uint8_t *data = ptfunxored + 0x14;
uintptr_t data_end = ((uintptr_t)ptfunxored) + 0x100;
uint8_t seg_type;
bool success = false;
while( ((uintptr_t)data < data_end) && (success == false) ) {
if (data[0] != 0x5a) {
success = false;
break;
}
seg_type = data[1];
/* Skip segment header */
data += 3;
if (data[0] == 0 && data[1] == 0) {
/* LE */
seg_len = data[0] << 24 | data[1] << 16 | data[2] << 8 | data[3];
} else {
/* BE */
seg_len = data[3] << 24 | data[2] << 16 | data[1] << 8 | data[0];
}
/* Skip seg_len */
data += 4;
if (!(seg_type == 0x04 || seg_type == 0x03) || data[0] != 0x03) {
/* Go to next segment */
data += seg_len;
continue;
}
/* Skip 0x03 0x00 0x00 */
data += 3;
seg_len -= 3;
str_len = (*(uint8_t *)data);
if (! (product = (uint8_t *)malloc((str_len+1) * sizeof(uint8_t)))) {
success = false;
break;
}
/* Skip str_len */
data += 4;
seg_len -= 4;
memcpy(product, data, str_len);
product[str_len] = 0;
data += str_len;
seg_len -= str_len;
/* Skip 0x03 0x00 0x00 0x00 */
data += 4;
seg_len -= 4;
version = data[0];
if (version == 0) {
version = data[3];
}
data += seg_len;
success = true;
}
/* If the above does not work, try other heuristics */
if ((uintptr_t)data >= data_end - seg_len) {
version = ptfunxored[0x40];
if (version == 0) {
version = ptfunxored[0x3d];
}
if (version == 0) {
version = ptfunxored[0x3a] + 2;
}
if (version != 0) {
success = true;
}
}
return (!success);
}
uint8_t
PTFFormat::gen_xor_delta(uint8_t xor_value, uint8_t mul, bool negative) {
uint16_t i;
for (i = 0; i < 256; i++) {
if (((i * mul) & 0xff) == xor_value) {
return (negative) ? i * (-1) : i;
}
}
// Should not occur
return 0;
}
int
PTFFormat::parse(void) {
if (version == 5) {
parse5header();
setrates();
if (sessionrate < 44100 || sessionrate > 192000)
return -1;
parseaudio5();
parserest5();
parsemidi();
} else if (version == 7) {
parse7header();
setrates();
if (sessionrate < 44100 || sessionrate > 192000)
return -1;
parseaudio();
parserest89();
parsemidi();
} else if (version == 8) {
parse8header();
setrates();
if (sessionrate < 44100 || sessionrate > 192000)
return -1;
parseaudio();
parserest89();
parsemidi();
} else if (version == 9) {
parse9header();
setrates();
if (sessionrate < 44100 || sessionrate > 192000)
return -1;
parseaudio();
parserest89();
parsemidi();
} else if (version == 10 || version == 11 || version == 12) {
parse10header();
setrates();
if (sessionrate < 44100 || sessionrate > 192000)
return -1;
parseaudio();
parserest12();
parsemidi12();
} else {
// Should not occur
return -1;
}
return 0;
}
void
PTFFormat::setrates(void) {
ratefactor = 1.f;
if (sessionrate != 0) {
ratefactor = (float)targetrate / sessionrate;
}
}
void
PTFFormat::parse5header(void) {
uint32_t k;
// Find session sample rate
k = 0x100;
jumpto(&k, ptfunxored, len, (const unsigned char *)"\x5a\x00\x02", 3);
sessionrate = 0;
sessionrate |= ptfunxored[k+12] << 16;
sessionrate |= ptfunxored[k+13] << 8;
sessionrate |= ptfunxored[k+14];
}
void
PTFFormat::parse7header(void) {
uint32_t k;
// Find session sample rate
k = 0x100;
jumpto(&k, ptfunxored, len, (const unsigned char *)"\x5a\x00\x05", 3);
sessionrate = 0;
sessionrate |= ptfunxored[k+12] << 16;
sessionrate |= ptfunxored[k+13] << 8;
sessionrate |= ptfunxored[k+14];
}
void
PTFFormat::parse8header(void) {
uint32_t k;
// Find session sample rate
k = 0;
jumpto(&k, ptfunxored, len, (const unsigned char *)"\x5a\x05", 2);
sessionrate = 0;
sessionrate |= ptfunxored[k+11];
sessionrate |= ptfunxored[k+12] << 8;
sessionrate |= ptfunxored[k+13] << 16;
}
void
PTFFormat::parse9header(void) {
uint32_t k;
// Find session sample rate
k = 0x100;
jumpto(&k, ptfunxored, len, (const unsigned char *)"\x5a\x06", 2);
sessionrate = 0;
sessionrate |= ptfunxored[k+11];
sessionrate |= ptfunxored[k+12] << 8;
sessionrate |= ptfunxored[k+13] << 16;
}
void
PTFFormat::parse10header(void) {
uint32_t k;
// Find session sample rate
k = 0x100;
jumpto(&k, ptfunxored, len, (const unsigned char *)"\x5a\x09", 2);
sessionrate = 0;
sessionrate |= ptfunxored[k+11];
sessionrate |= ptfunxored[k+12] << 8;
sessionrate |= ptfunxored[k+13] << 16;
}
void
PTFFormat::parserest5(void) {
uint32_t i, j, k;
uint64_t regionspertrack, lengthofname;
uint64_t startbytes, lengthbytes, offsetbytes;
uint16_t tracknumber = 0;
uint16_t findex;
uint16_t rindex;
k = 0;
for (i = 0; i < 5; i++) {
jumpto(&k, ptfunxored, len, (const unsigned char *)"\x5a\x00\x03", 3);
k++;
}
k--;
for (i = 0; i < 2; i++) {
jumpback(&k, ptfunxored, len, (const unsigned char *)"\x5a\x00\x01", 3);
if (k)
k--;
}
k++;
rindex = 0;
while (k < len) {
if ( (ptfunxored[k ] == 0xff) &&
(ptfunxored[k+1] == 0xff)) {
break;
}
jumpto(&k, ptfunxored, len, (const unsigned char *)"\x5a\x00\x01", 3);
lengthofname = ptfunxored[k+12];
if (ptfunxored[k+13] == 0x5a) {
k++;
break;
}
char name[256] = {0};
for (j = 0; j < lengthofname; j++) {
name[j] = ptfunxored[k+13+j];
}
name[j] = '\0';
regionspertrack = ptfunxored[k+13+j+3];
for (i = 0; i < regionspertrack; i++) {
jumpto(&k, ptfunxored, len, (const unsigned char *)"\x5a\x00\x03", 3);
j = k+16;
startbytes = (ptfunxored[j+3] & 0xf0) >> 4;
lengthbytes = (ptfunxored[j+2] & 0xf0) >> 4;
offsetbytes = (ptfunxored[j+1] & 0xf0) >> 4;
//somethingbytes = (ptfunxored[j+1] & 0xf);
findex = ptfunxored[k+14];
j--;
uint32_t start = 0;
switch (startbytes) {
case 4:
start |= (uint32_t)(ptfunxored[j+8] << 24);
case 3:
start |= (uint32_t)(ptfunxored[j+7] << 16);
case 2:
start |= (uint32_t)(ptfunxored[j+6] << 8);
case 1:
start |= (uint32_t)(ptfunxored[j+5]);
default:
break;
}
j+=startbytes;
uint32_t length = 0;
switch (lengthbytes) {
case 4:
length |= (uint32_t)(ptfunxored[j+8] << 24);
case 3:
length |= (uint32_t)(ptfunxored[j+7] << 16);
case 2:
length |= (uint32_t)(ptfunxored[j+6] << 8);
case 1:
length |= (uint32_t)(ptfunxored[j+5]);
default:
break;
}
j+=lengthbytes;
uint32_t sampleoffset = 0;
switch (offsetbytes) {
case 4:
sampleoffset |= (uint32_t)(ptfunxored[j+8] << 24);
case 3:
sampleoffset |= (uint32_t)(ptfunxored[j+7] << 16);
case 2:
sampleoffset |= (uint32_t)(ptfunxored[j+6] << 8);
case 1:
sampleoffset |= (uint32_t)(ptfunxored[j+5]);
default:
break;
}
j+=offsetbytes;
//printf("name=`%s` start=%04x length=%04x offset=%04x findex=%d\n", name,start,length,sampleoffset,findex);
std::string filename = string(name);
wav_t f = {
filename,
findex,
(int64_t)(start*ratefactor),
(int64_t)(length*ratefactor),
};
vector<wav_t>::iterator begin = audiofiles.begin();
vector<wav_t>::iterator finish = audiofiles.end();
vector<wav_t>::iterator found;
// Add file to lists
if ((found = std::find(begin, finish, f)) != finish) {
f.filename = (*found).filename;
std::vector<midi_ev_t> m;
region_t r = {
name,
rindex,
(int64_t)(start*ratefactor),
(int64_t)(sampleoffset*ratefactor),
(int64_t)(length*ratefactor),
*found,
m
};
regions.push_back(r);
vector<track_t>::iterator ti;
vector<track_t>::iterator bt = tracks.begin();
vector<track_t>::iterator et = tracks.end();
track_t tr = { name, 0, 0, r };
if ((ti = std::find(bt, et, tr)) != et) {
tracknumber = (*ti).index;
} else {
tracknumber = tracks.size() + 1;
}
track_t t = {
name,
(uint16_t)tracknumber,
uint8_t(0),
r
};
tracks.push_back(t);
} else {
std::vector<midi_ev_t> m;
region_t r = {
name,
rindex,
(int64_t)(start*ratefactor),
(int64_t)(sampleoffset*ratefactor),
(int64_t)(length*ratefactor),
f,
m,
};
regions.push_back(r);
vector<track_t>::iterator ti;
vector<track_t>::iterator bt = tracks.begin();
vector<track_t>::iterator et = tracks.end();
track_t tr = { name, 0, 0, r };
if ((ti = std::find(bt, et, tr)) != et) {
tracknumber = (*ti).index;
} else {
tracknumber = tracks.size() + 1;
}
track_t t = {
name,
(uint16_t)tracknumber,
uint8_t(0),
r
};
tracks.push_back(t);
}
rindex++;
k++;
}
k++;
}
}
void
PTFFormat::resort(std::vector<wav_t>& ws) {
int j = 0;
std::sort(ws.begin(), ws.end());
for (std::vector<wav_t>::iterator i = ws.begin(); i != ws.end(); ++i) {
(*i).index = j;
j++;
}
}
void
PTFFormat::resort(std::vector<region_t>& rs) {
int j = 0;
//std::sort(rs.begin(), rs.end());
for (std::vector<region_t>::iterator i = rs.begin(); i != rs.end(); ++i) {
(*i).index = j;
j++;
}
}
void
PTFFormat::filter(std::vector<region_t>& rs) {
for (std::vector<region_t>::iterator i = rs.begin(); i != rs.end(); ++i) {
if (i->length == 0)
rs.erase(i);
}
}
void
PTFFormat::parseaudio5(void) {
uint32_t i,k,l;
uint64_t lengthofname, wavnumber;
// Find end of wav file list
k = 0;
jumpto(&k, ptfunxored, len, (const unsigned char *)"\x5f\x50\x35", 3);
k++;
jumpto(&k, ptfunxored, len, (const unsigned char *)"\x5f\x50\x35", 3);
// Find actual wav names
uint16_t numberofwavs = ptfunxored[k-23];
char wavname[256];
i = k;
jumpto(&i, ptfunxored, len, (const unsigned char *)"Files", 5);
wavnumber = 0;
i+=16;
char ext[5];
while (i < len && numberofwavs > 0) {
i++;
if ( (ptfunxored[i ] == 0x5a) &&
(ptfunxored[i+1] == 0x00) &&
(ptfunxored[i+2] == 0x05)) {
break;
}
lengthofname = ptfunxored[i];
i++;
l = 0;
while (l < lengthofname) {
wavname[l] = ptfunxored[i+l];
l++;
}
i+=lengthofname;
ext[0] = ptfunxored[i++];
ext[1] = ptfunxored[i++];
ext[2] = ptfunxored[i++];
ext[3] = ptfunxored[i++];
ext[4] = '\0';
wavname[l] = 0;
if (foundin(wavname, ".L") || foundin(wavname, ".R")) {
extension = string("");
} else if (foundin(wavname, ".wav") || foundin(ext, "WAVE")) {
extension = string(".wav");
} else if (foundin(wavname, ".aif") || foundin(ext, "AIFF")) {
extension = string(".aif");
} else {
extension = string("");
}
std::string wave = string(wavname);
wav_t f = { wave, (uint16_t)(wavnumber++), 0, 0 };
if (foundin(wave, string(".grp"))) {
continue;
}
actualwavs.push_back(f);
audiofiles.push_back(f);
//printf("done\n");
numberofwavs--;
i += 7;
}
resort(actualwavs);
resort(audiofiles);
}
struct mchunk {
mchunk (uint64_t zt, uint64_t ml, std::vector<PTFFormat::midi_ev_t> const& c)
: zero (zt)
, maxlen (ml)
, chunk (c)
{}
uint64_t zero;
uint64_t maxlen;
std::vector<PTFFormat::midi_ev_t> chunk;
};
void
PTFFormat::parsemidi(void) {
uint32_t i, k;
uint64_t tr, n_midi_events, zero_ticks;
uint64_t midi_pos, midi_len, max_pos, region_pos;
uint8_t midi_velocity, midi_note;
uint16_t ridx;
uint16_t nmiditracks, regionnumber = 0;
uint32_t nregions, mr;
std::vector<mchunk> midichunks;
midi_ev_t m;
// Find MdNLB
k = 0;
// Parse all midi chunks, not 1:1 mapping to regions yet
while (k + 35 < len) {
max_pos = 0;
std::vector<midi_ev_t> midi;
if (!jumpto(&k, ptfunxored, len, (const unsigned char *)"MdNLB", 5)) {
break;
}
k += 11;
n_midi_events = ptfunxored[k] | ptfunxored[k+1] << 8 |
ptfunxored[k+2] << 16 | ptfunxored[k+3] << 24;
k += 4;
zero_ticks = (uint64_t)ptfunxored[k] |
(uint64_t)ptfunxored[k+1] << 8 |
(uint64_t)ptfunxored[k+2] << 16 |
(uint64_t)ptfunxored[k+3] << 24 |
(uint64_t)ptfunxored[k+4] << 32;
for (i = 0; i < n_midi_events && k < len; i++, k += 35) {
midi_pos = (uint64_t)ptfunxored[k] |
(uint64_t)ptfunxored[k+1] << 8 |
(uint64_t)ptfunxored[k+2] << 16 |
(uint64_t)ptfunxored[k+3] << 24 |
(uint64_t)ptfunxored[k+4] << 32;
midi_pos -= zero_ticks;
midi_note = ptfunxored[k+8];
midi_len = (uint64_t)ptfunxored[k+9] |
(uint64_t)ptfunxored[k+10] << 8 |
(uint64_t)ptfunxored[k+11] << 16 |
(uint64_t)ptfunxored[k+12] << 24 |
(uint64_t)ptfunxored[k+13] << 32;
midi_velocity = ptfunxored[k+17];
if (midi_pos + midi_len > max_pos) {
max_pos = midi_pos + midi_len;
}
m.pos = midi_pos;
m.length = midi_len;
m.note = midi_note;
m.velocity = midi_velocity;
#if 1
// stop gap measure to prevent crashes in ardour,
// remove when decryption is fully solved for .ptx
if ((m.velocity & 0x80) || (m.note & 0x80) ||
(m.pos & 0xff00000000LL) || (m.length & 0xff00000000LL)) {
continue;
}
#endif
midi.push_back(m);
}
midichunks.push_back(mchunk (zero_ticks, max_pos, midi));
}
// Map midi chunks to regions
while (k < len) {
char midiregionname[256];
uint8_t namelen;
if (!jumpto(&k, ptfunxored, len, (const unsigned char *)"MdTEL", 5)) {
break;
}
k += 41;
nregions = 0;
nregions |= ptfunxored[k];
nregions |= ptfunxored[k+1] << 8;
for (mr = 0; mr < nregions; mr++) {
if (!jumpto(&k, ptfunxored, len, (const unsigned char *)"\x5a\x0c", 2)) {
break;
}
k += 9;
namelen = ptfunxored[k];
for (i = 0; i < namelen; i++) {
midiregionname[i] = ptfunxored[k+4+i];
}
midiregionname[namelen] = '\0';
k += 4 + namelen;
k += 5;
/*
region_pos = (uint64_t)ptfunxored[k] |
(uint64_t)ptfunxored[k+1] << 8 |
(uint64_t)ptfunxored[k+2] << 16 |
(uint64_t)ptfunxored[k+3] << 24 |
(uint64_t)ptfunxored[k+4] << 32;
*/
if (!jumpto(&k, ptfunxored, len, (const unsigned char *)"\xfe\xff\xff\xff", 4)) {
break;
}
k += 40;
ridx = ptfunxored[k];
ridx |= ptfunxored[k+1] << 8;
struct mchunk mc = *(midichunks.begin()+ridx);
wav_t w = { std::string(""), 0, 0, 0 };
region_t r = {
midiregionname,
regionnumber++,
//(int64_t)mc.zero,
(int64_t)0xe8d4a51000ULL,
(int64_t)(0),
//(int64_t)(max_pos*sessionrate*60/(960000*120)),
(int64_t)mc.maxlen,
w,
mc.chunk,
};
midiregions.push_back(r);
}
}
// Put midi regions on midi tracks
if (!jumpto(&k, ptfunxored, len, (const unsigned char *)"\x5a\x03", 2)) {
return;
}
k -= 4;
nmiditracks = 0;
nmiditracks |= ptfunxored[k];
nmiditracks |= ptfunxored[k+1] << 8;
k += 4;
for (tr = 0; tr < nmiditracks; tr++) {
char miditrackname[256];
uint8_t namelen;
if (!jumpto(&k, ptfunxored, len, (const unsigned char *)"\x5a\x03", 2)) {
return;
}
namelen = ptfunxored[k+9];
for (i = 0; i < namelen; i++) {
miditrackname[i] = ptfunxored[k+13+i];
}
miditrackname[namelen] = '\0';
k += 13 + namelen;
nregions = 0;
nregions |= ptfunxored[k];
nregions |= ptfunxored[k+1] << 8;
for (i = 0; (i < nregions) && (k < len); i++) {
k += 24;
ridx = 0;
ridx |= ptfunxored[k];
ridx |= ptfunxored[k+1] << 8;
k += 5;
region_pos = (uint64_t)ptfunxored[k] |
(uint64_t)ptfunxored[k+1] << 8 |
(uint64_t)ptfunxored[k+2] << 16 |
(uint64_t)ptfunxored[k+3] << 24 |
(uint64_t)ptfunxored[k+4] << 32;
k += 20;
track_t mtr;
mtr.name = string(miditrackname);
mtr.index = tr;
mtr.playlist = 0;
// Find the midi region with index 'ridx'
std::vector<region_t>::iterator begin = midiregions.begin();
std::vector<region_t>::iterator finish = midiregions.end();
std::vector<region_t>::iterator mregion;
wav_t w = { std::string(""), 0, 0, 0 };
std::vector<midi_ev_t> m;
region_t r = { std::string(""), ridx, 0, 0, 0, w, m};
if ((mregion = std::find(begin, finish, r)) != finish) {
mtr.reg = *mregion;
mtr.reg.startpos = labs(region_pos - mtr.reg.startpos);
miditracks.push_back(mtr);
}
}
}
}
void
PTFFormat::parsemidi12(void) {
uint32_t i, k;
uint64_t tr, n_midi_events, zero_ticks;
uint64_t midi_pos, midi_len, max_pos, region_pos;
uint8_t midi_velocity, midi_note;
uint16_t ridx;
uint16_t nmiditracks, regionnumber = 0;
uint32_t nregions, mr;
std::vector<mchunk> midichunks;
midi_ev_t m;
k = 0;
// Parse all midi chunks, not 1:1 mapping to regions yet
while (k + 35 < len) {
max_pos = 0;
std::vector<midi_ev_t> midi;
// Find MdNLB
if (!jumpto(&k, ptfunxored, len, (const unsigned char *)"MdNLB", 5)) {
break;
}
k += 11;
n_midi_events = ptfunxored[k] | ptfunxored[k+1] << 8 |
ptfunxored[k+2] << 16 | ptfunxored[k+3] << 24;
k += 4;
zero_ticks = (uint64_t)ptfunxored[k] |
(uint64_t)ptfunxored[k+1] << 8 |
(uint64_t)ptfunxored[k+2] << 16 |
(uint64_t)ptfunxored[k+3] << 24 |
(uint64_t)ptfunxored[k+4] << 32;
for (i = 0; i < n_midi_events && k < len; i++, k += 35) {
midi_pos = (uint64_t)ptfunxored[k] |
(uint64_t)ptfunxored[k+1] << 8 |
(uint64_t)ptfunxored[k+2] << 16 |
(uint64_t)ptfunxored[k+3] << 24 |