ref: 9435ca2b06a5108b9314e700967ad4cb97ca791f
dir: /src/ft2_module_loader.c/
// for finding memory leaks in debug mode with Visual Studio
#if defined _DEBUG && defined _MSC_VER
#include <crtdbg.h>
#endif
#include <stdio.h>
#include <stdint.h>
#include <stdbool.h>
#ifndef _WIN32
#include <unistd.h>
#endif
#include "ft2_header.h"
#include "ft2_scopes.h"
#include "ft2_trim.h"
#include "ft2_inst_ed.h"
#include "ft2_sample_ed.h"
#include "ft2_wav_renderer.h"
#include "ft2_pattern_ed.h"
#include "ft2_gui.h"
#include "ft2_diskop.h"
#include "ft2_sample_loader.h"
#include "ft2_mouse.h"
#include "ft2_midi.h"
#include "ft2_events.h"
#include "ft2_video.h"
#include "ft2_structs.h"
#include "ft2_sysreqs.h"
bool loadDIGI(FILE *f, uint32_t filesize);
bool loadMOD(FILE *f, uint32_t filesize);
bool loadS3M(FILE *f, uint32_t filesize);
bool loadSTK(FILE *f, uint32_t filesize);
bool loadSTM(FILE *f, uint32_t filesize);
bool loadXM(FILE *f, uint32_t filesize);
enum
{
FORMAT_UNKNOWN = 0,
FORMAT_POSSIBLY_STK = 1,
FORMAT_XM = 2,
FORMAT_MOD = 3,
FORMAT_S3M = 4,
FORMAT_STM = 5,
FORMAT_DIGI = 6
};
// file extensions accepted by Disk Op. in module mode
char *supportedModExtensions[] =
{
"xm", "ft", "nst", "stk", "mod", "s3m", "stm", "fst", "digi",
"END_OF_LIST" // do NOT move, remove or edit this line!
};
// globals for module loaders
volatile bool tmpLinearPeriodsFlag;
int16_t pattLensTmp[MAX_PATTERNS];
tonTyp *pattTmp[MAX_PATTERNS];
instrTyp *instrTmp[1+256];
songTyp songTmp;
// --------------------------
static volatile bool musicIsLoading, moduleLoaded, moduleFailedToLoad;
static SDL_Thread *thread;
static uint8_t oldPlayMode;
static void setupLoadedModule(void);
static void freeTmpModule(void);
// Crude module detection routine. These aren't always accurate detections!
static int8_t detectModule(FILE *f)
{
uint8_t D[256], I[4];
fseek(f, 0, SEEK_END);
uint32_t fileLength = (uint32_t)ftell(f);
rewind(f);
memset(D, 0, sizeof (D));
fread(D, 1, sizeof (D), f);
fseek(f, 1080, SEEK_SET); // MOD ID
I[0] = I[1] = I[2] = I[3] = 0;
fread(I, 1, 4, f);
rewind(f);
// DIGI Booster (non-Pro)
if (!memcmp("DIGI Booster module", &D[0x00], 19+1) && D[0x19] >= 1 && D[0x19] <= 8)
return FORMAT_DIGI;
// Scream Tracker 3 S3M (and compatible trackers)
if (!memcmp("SCRM", &D[0x2C], 4) && D[0x1D] == 16) // XXX: byte=16 in all cases?
return FORMAT_S3M;
// Scream Tracker 2 STM
if ((!memcmp("!Scream!", &D[0x14], 8) || !memcmp("BMOD2STM", &D[0x14], 8) ||
!memcmp("WUZAMOD!", &D[0x14], 8) || !memcmp("SWavePro", &D[0x14], 8)) && D[0x1D] == 2) // XXX: byte=2 for "WUZAMOD!"/"SWavePro" ?
{
return FORMAT_STM;
}
// Generic multi-channel MOD (1..9 channels)
if (isdigit(I[0]) && I[0] != '0' && I[1] == 'C' && I[2] == 'H' && I[3] == 'N') // xCHN
return FORMAT_MOD;
// Digital Tracker (Atari Falcon)
if (I[0] == 'F' && I[1] == 'A' && I[2] == '0' && I[3] >= '4' && I[3] <= '8') // FA0x (x=4..8)
return FORMAT_MOD;
// Generic multi-channel MOD (10..99 channels)
if (isdigit(I[0]) && isdigit(I[1]) && I[0] != '0' && I[2] == 'C' && I[3] == 'H') // xxCH
return FORMAT_MOD;
// Generic multi-channel MOD (10..99 channels)
if (isdigit(I[0]) && isdigit(I[1]) && I[0] != '0' && I[2] == 'C' && I[3] == 'N') // xxCN (same as xxCH)
return FORMAT_MOD;
// ProTracker and generic MOD formats
if (!memcmp("M.K.", I, 4) || !memcmp("M!K!", I, 4) || !memcmp("NSMS", I, 4) ||
!memcmp("LARD", I, 4) || !memcmp("PATT", I, 4) || !memcmp("FLT4", I, 4) ||
!memcmp("FLT8", I, 4) || !memcmp("EXO4", I, 4) || !memcmp("EXO8", I, 4) ||
!memcmp("N.T.", I, 4) || !memcmp("M&K!", I, 4) || !memcmp("FEST", I, 4) ||
!memcmp("CD61", I, 4) || !memcmp("CD81", I, 4) || !memcmp("OKTA", I, 4) ||
!memcmp("OCTA", I, 4))
{
return FORMAT_MOD;
}
/* Check if the file is a .it module (Impulse Tracker, not supported).
** Some people may attempt to load .IT files in the FT2 clone, so
** reject them here instead of accidentally loading them as .STK
*/
if (!memcmp("IMPM", D, 4) && D[0x16] == 0)
return FORMAT_UNKNOWN;
/* Fasttracker II XM and compatible trackers.
** Note: This test can falsely be true for STK modules (and non-supported files) where the
** first 17 bytes start with "Extended Module: ". This is unlikely to happen.
*/
if (!memcmp("Extended Module: ", &D[0x00], 17))
return FORMAT_XM;
/* Lastly, we assume that the file is either a 15-sample STK or an unsupported file.
** Let's assume it's an STK and do some sanity checks. If they fail, we have an
** unsupported file.
*/
// minimum and maximum (?) possible size for a supported STK
if (fileLength < 1624 || fileLength > 984634)
return FORMAT_UNKNOWN;
// test STK numOrders+BPM for illegal values
fseek(f, 470, SEEK_SET);
D[0] = D[1] = 0;
fread(D, 1, 2, f);
rewind(f);
if (D[0] >= 0 && D[0] <= 128 && D[1] <= 220)
return FORMAT_POSSIBLY_STK;
return FORMAT_UNKNOWN;
}
static bool doLoadMusic(bool externalThreadFlag)
{
// setup message box functions
loaderMsgBox = externalThreadFlag ? myLoaderMsgBoxThreadSafe : myLoaderMsgBox;
loaderSysReq = externalThreadFlag ? okBoxThreadSafe : okBox;
if (editor.tmpFilenameU == NULL)
{
loaderMsgBox("Generic memory fault during loading!");
goto loadError;
}
FILE *f = UNICHAR_FOPEN(editor.tmpFilenameU, "rb");
if (f == NULL)
{
loaderMsgBox("General I/O error during loading! Is the file in use? Does it exist?");
goto loadError;
}
int8_t format = detectModule(f);
fseek(f, 0, SEEK_END);
uint32_t filesize = ftell(f);
rewind(f);
switch (format)
{
case FORMAT_XM: moduleLoaded = loadXM(f, filesize); break;
case FORMAT_S3M: moduleLoaded = loadS3M(f, filesize); break;
case FORMAT_STM: moduleLoaded = loadSTM(f, filesize); break;
case FORMAT_MOD: moduleLoaded = loadMOD(f, filesize); break;
case FORMAT_POSSIBLY_STK: moduleLoaded = loadSTK(f, filesize); break;
case FORMAT_DIGI: moduleLoaded = loadDIGI(f, filesize); break;
default:
loaderMsgBox("This file is not a supported module!");
break;
}
fclose(f);
if (!moduleLoaded)
goto loadError;
moduleLoaded = true;
return true;
loadError:
freeTmpModule();
moduleFailedToLoad = true;
return false;
}
static void clearTmpModule(void)
{
memset(pattTmp, 0, sizeof (pattTmp));
memset(instrTmp, 0, sizeof (instrTmp));
memset(&songTmp, 0, sizeof (songTmp));
for (uint32_t i = 0; i < MAX_PATTERNS; i++)
pattLensTmp[i] = 64;
}
static int32_t SDLCALL loadMusicThread(void *ptr)
{
return doLoadMusic(true);
(void)ptr;
}
void loadMusic(UNICHAR *filenameU)
{
if (musicIsLoading || filenameU == NULL)
return;
mouseAnimOn();
musicIsLoading = true;
moduleLoaded = false;
moduleFailedToLoad = false;
clearTmpModule(); // clear stuff from last loading session (very important)
UNICHAR_STRCPY(editor.tmpFilenameU, filenameU);
thread = SDL_CreateThread(loadMusicThread, NULL, NULL);
if (thread == NULL)
{
editor.loadMusicEvent = EVENT_NONE;
okBox(0, "System message", "Couldn't create thread!");
musicIsLoading = false;
return;
}
SDL_DetachThread(thread);
}
bool loadMusicUnthreaded(UNICHAR *filenameU, bool autoPlay)
{
if (filenameU == NULL)
return false;
clearTmpModule(); // clear stuff from last loading session (very important)
UNICHAR_STRCPY(editor.tmpFilenameU, filenameU);
editor.loadMusicEvent = EVENT_NONE;
doLoadMusic(false);
if (moduleLoaded)
{
setupLoadedModule();
if (autoPlay)
startPlaying(PLAYMODE_SONG, 0);
return true;
}
return false;
}
bool allocateTmpPatt(int32_t nr, uint16_t rows)
{
pattTmp[nr] = (tonTyp *)calloc((MAX_PATT_LEN * TRACK_WIDTH) + 16, 1);
if (pattTmp[nr] == NULL)
return false;
pattLensTmp[nr] = rows;
return true;
}
bool allocateTmpInstr(int16_t nr)
{
if (instrTmp[nr] != NULL)
return false; // already allocated
instrTyp *p = (instrTyp *)calloc(1, sizeof (instrTyp));
if (p == NULL)
return false;
sampleTyp *s = p->samp;
for (int32_t i = 0; i < MAX_SMP_PER_INST; i++, s++)
{
s->pan = 128;
s->vol = 64;
}
instrTmp[nr] = p;
return true;
}
static void freeTmpModule(void) // called on module load error
{
// free all patterns
for (int32_t i = 0; i < MAX_PATTERNS; i++)
{
if (pattTmp[i] != NULL)
{
free(pattTmp[i]);
pattTmp[i] = NULL;
}
}
// free all instruments and samples
for (int32_t i = 1; i <= 256; i++) // if >128 instruments, we fake-load up to 128 extra (and discard them later)
{
if (instrTmp[i] == NULL)
continue;
sampleTyp *s = instrTmp[i]->samp;
for (int32_t j = 0; j < MAX_SMP_PER_INST; j++, s++)
{
if (s->origPek != NULL)
free(s->origPek);
}
free(instrTmp[i]);
instrTmp[i] = NULL;
}
}
bool tmpPatternEmpty(uint16_t nr)
{
if (pattTmp[nr] == NULL)
return true;
uint8_t *scanPtr = (uint8_t *)pattTmp[nr];
const uint32_t scanLen = pattLensTmp[nr] * TRACK_WIDTH;
for (uint32_t i = 0; i < scanLen; i++)
{
if (scanPtr[i] != 0)
return false;
}
return true;
}
void clearUnusedChannels(tonTyp *p, int16_t pattLen, int32_t antChn)
{
if (p == NULL || antChn >= MAX_VOICES)
return;
const int32_t width = sizeof (tonTyp) * (MAX_VOICES - antChn);
tonTyp *ptr = &p[antChn];
for (int32_t i = 0; i < pattLen; i++, ptr += MAX_VOICES)
memset(ptr, 0, width);
}
// called from input/video thread after the module was done loading
static void setupLoadedModule(void)
{
lockMixerCallback();
freeAllInstr();
freeAllPatterns();
oldPlayMode = playMode;
playMode = PLAYMODE_IDLE;
songPlaying = false;
#ifdef HAS_MIDI
midi.currMIDIVibDepth = 0;
midi.currMIDIPitch = 0;
#endif
memset(editor.keyOnTab, 0, sizeof (editor.keyOnTab));
// copy over new pattern pointers and lengths
for (int32_t i = 0; i < MAX_PATTERNS; i++)
{
patt[i] = pattTmp[i];
pattLens[i] = pattLensTmp[i];
}
// copy over song struct
memcpy(&song, &songTmp, sizeof (songTyp));
fixSongName();
// copy over new instruments (includes sample pointers)
for (int16_t i = 1; i <= MAX_INST; i++)
{
instr[i] = instrTmp[i];
fixInstrAndSampleNames(i);
if (instr[i] != NULL)
{
for (int32_t j = 0; j < MAX_SMP_PER_INST; j++)
{
sampleTyp *s = &instr[i]->samp[j];
checkSampleRepeat(s);
if (s->pek != NULL)
fixSample(s); // prepare sample for branchless linear interpolation
}
}
}
// we are the owners of the allocated memory ptrs set by the loader thread now
// support non-even channel numbers
if (song.antChn & 1)
{
song.antChn++;
if (song.antChn > MAX_VOICES)
song.antChn = MAX_VOICES;
}
if (song.len == 0)
song.len = 1;
if (song.repS >= song.len)
song.repS = 0;
song.globVol = 64;
setScrollBarEnd(SB_POS_ED, (song.len - 1) + 5);
setScrollBarPos(SB_POS_ED, 0, false);
resetChannels();
setPos(0, 0, true);
P_SetSpeed(song.speed);
editor.tmpPattern = editor.editPattern; // set kludge variable
editor.speed = song.speed;
editor.tempo = song.tempo;
editor.timer = song.timer;
editor.globalVol = song.globVol;
setFrqTab(tmpLinearPeriodsFlag);
unlockMixerCallback();
editor.currVolEnvPoint = 0;
editor.currPanEnvPoint = 0;
refreshScopes();
exitTextEditing();
updateTextBoxPointers();
resetChannelOffset();
updateChanNums();
resetWavRenderer();
clearPattMark();
resetTrimSizes();
resetPlaybackTime();
diskOpSetFilename(DISKOP_ITEM_MODULE, editor.tmpFilenameU);
// redraw top part of screen
if (ui.extended)
{
togglePatternEditorExtended(); // exit
togglePatternEditorExtended(); // re-enter (force redrawing)
}
else
{
// redraw top screen
hideTopScreen();
showTopScreen(true);
}
updateSampleEditorSample();
showBottomScreen(); // redraw bottom screen (also redraws pattern editor)
if (ui.instEditorShown)
drawPiano(NULL); // redraw piano now (since if playing = wait for next tick update)
removeSongModifiedFlag();
moduleFailedToLoad = false;
moduleLoaded = false;
editor.loadMusicEvent = EVENT_NONE;
}
bool handleModuleLoadFromArg(int argc, char **argv)
{
UNICHAR tmpPathU[PATH_MAX+2];
// this is crude, we always expect only one parameter, and that it is the module.
if (argc != 2 || argv[1] == NULL || argv[1][0] == '\0')
return false;
#ifdef __APPLE__
if (argc == 2 && !strncmp(argv[1], "-psn_", 5))
return false; // OS X < 10.9 passes a -psn_x_xxxxx parameter on double-click launch
#endif
const uint32_t filenameLen = (const uint32_t)strlen(argv[1]);
UNICHAR *filenameU = (UNICHAR *)calloc(filenameLen+1, sizeof (UNICHAR));
if (filenameU == NULL)
{
okBox(0, "System message", "Not enough memory!");
return false;
}
#ifdef _WIN32
MultiByteToWideChar(CP_UTF8, 0, argv[1], -1, filenameU, filenameLen);
#else
strcpy(filenameU, argv[1]);
#endif
// store old path
UNICHAR_GETCWD(tmpPathU, PATH_MAX);
// set path to where the main executable is
UNICHAR_CHDIR(editor.binaryPathU);
const int32_t filesize = getFileSize(filenameU);
if (filesize == -1 || filesize >= 512L*1024*1024) // 1) >=2GB 2) >=512MB
{
okBox(0, "System message", "Error: The module is too big to be loaded!");
free(filenameU);
UNICHAR_CHDIR(tmpPathU); // set old path back
return false;
}
bool result = loadMusicUnthreaded(filenameU, true);
free(filenameU);
UNICHAR_CHDIR(tmpPathU); // set old path back
return result;
}
static bool fileIsModule(UNICHAR *pathU)
{
FILE *f = UNICHAR_FOPEN(pathU, "rb");
if (f == NULL)
return false;
int8_t modFormat = detectModule(f);
fclose(f);
/* If the module was not identified (possibly STK type),
** check the file extension and handle it as a module only
** if it starts with "mod."/"stk." or ends with ".mod"/".stk" (case insensitive).
*/
if (modFormat == FORMAT_POSSIBLY_STK)
{
char *path = unicharToCp437(pathU, false);
if (path == NULL)
return false;
int32_t pathLen = (int32_t)strlen(path);
// get filename from path
int32_t i = pathLen;
while (i--)
{
if (path[i] == DIR_DELIMITER)
break;
}
char *filename = path;
if (i > 0)
filename += i + 1;
int32_t filenameLen = (int32_t)strlen(filename);
// --------------------------
if (filenameLen > 5)
{
if (!_strnicmp("mod.", filename, 4) || !_strnicmp("stk.", filename, 4))
{
free(path);
return true;
}
if (!_strnicmp(".mod", &filename[filenameLen-4], 4) || !_strnicmp(".stk", &filename[filenameLen-4], 4))
{
free(path);
return true;
}
}
free(path);
return false;
}
return (modFormat != FORMAT_UNKNOWN);
}
void loadDroppedFile(char *fullPathUTF8, bool songModifiedCheck)
{
if (ui.sysReqShown || fullPathUTF8 == NULL)
return;
const int32_t fullPathLen = (const int32_t)strlen(fullPathUTF8);
if (fullPathLen == 0)
return;
UNICHAR *fullPathU = (UNICHAR *)calloc(fullPathLen + 2, sizeof (UNICHAR));
if (fullPathU == NULL)
{
okBox(0, "System message", "Not enough memory!");
return;
}
#ifdef _WIN32
MultiByteToWideChar(CP_UTF8, 0, fullPathUTF8, -1, fullPathU, fullPathLen);
#else
strcpy(fullPathU, fullPathUTF8);
#endif
const int32_t filesize = getFileSize(fullPathU);
if (filesize == -1) // >2GB
{
okBox(0, "System message", "The file is too big and can't be loaded (over 2GB).");
free(fullPathU);
return;
}
if (filesize >= 128L*1024*1024) // 128MB
{
if (okBox(2, "System request", "Are you sure you want to load such a big file?") != 1)
{
free(fullPathU);
return;
}
}
// pass UTF8 to these tests so that we can test file ending in ASCII/ANSI
if (fileIsInstr(fullPathU))
{
loadInstr(fullPathU);
}
else if (fileIsModule(fullPathU))
{
SDL_RestoreWindow(video.window);
if (songModifiedCheck && song.isModified)
{
// de-minimize window and set focus so that the user sees the message box
SDL_RestoreWindow(video.window);
SDL_RaiseWindow(video.window);
if (!askUnsavedChanges(ASK_TYPE_LOAD_SONG))
{
free(fullPathU);
return;
}
}
editor.loadMusicEvent = EVENT_LOADMUSIC_DRAGNDROP;
loadMusic(fullPathU);
}
else
{
loadSample(fullPathU, editor.curSmp, false);
}
free(fullPathU);
}
static void handleOldPlayMode(void)
{
playMode = oldPlayMode;
if (oldPlayMode != PLAYMODE_IDLE && oldPlayMode != PLAYMODE_EDIT)
startPlaying(oldPlayMode, 0);
songPlaying = (playMode >= PLAYMODE_SONG);
}
// called from input/video thread after module load thread was finished
void handleLoadMusicEvents(void)
{
if (!moduleLoaded && !moduleFailedToLoad)
return; // no event to handle
if (moduleFailedToLoad)
{
// module failed to load from loading thread
musicIsLoading = false;
moduleFailedToLoad = false;
moduleLoaded = false;
editor.loadMusicEvent = EVENT_NONE;
setMouseBusy(false);
return;
}
if (moduleLoaded)
{
// module was successfully loaded from loading thread
switch (editor.loadMusicEvent)
{
// module dragged and dropped *OR* user double clicked a file associated with FT2 clone
case EVENT_LOADMUSIC_DRAGNDROP:
{
setupLoadedModule();
if (editor.autoPlayOnDrop)
startPlaying(PLAYMODE_SONG, 0);
else
handleOldPlayMode();
}
break;
// filename passed as an exe argument *OR* user double clicked a file associated with FT2 clone
case EVENT_LOADMUSIC_ARGV:
{
setupLoadedModule();
startPlaying(PLAYMODE_SONG, 0);
}
break;
// module filename pressed in Disk Op.
case EVENT_LOADMUSIC_DISKOP:
{
setupLoadedModule();
handleOldPlayMode();
}
break;
default: break;
}
moduleLoaded = false;
editor.loadMusicEvent = EVENT_NONE;
musicIsLoading = false;
mouseAnimOff();
}
}