/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * $Id$ * * Copyright (C) 2005 Stepan Moskovchenko * * 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY * KIND, either express or implied. * ****************************************************************************/ #include "plugin.h" #include "guspat.h" #include "midiutil.h" extern struct plugin_api * rb; /* This came from one of the Gravis documents */ const uint32_t gustable[]= { 8175, 8661, 9177, 9722, 10300, 10913, 11562, 12249, 12978, 13750, 14567, 15433, 16351, 17323, 18354, 19445, 20601, 21826, 23124, 24499, 25956, 27500, 29135, 30867, 32703, 34647, 36708, 38890, 41203, 43653, 46249, 48999, 51913, 54999, 58270, 61735, 65406, 69295, 73416, 77781, 82406, 87306, 92498, 97998, 103826, 109999, 116540, 123470, 130812, 138591, 146832, 155563, 164813, 174614, 184997, 195997, 207652, 219999, 233081, 246941, 261625, 277182, 293664, 311126, 329627, 349228, 369994, 391995, 415304, 440000, 466163, 493883, 523251, 554365, 587329, 622254, 659255, 698456, 739989, 783991, 830609, 880000, 932328, 987767, 1046503, 1108731, 1174660, 1244509, 1318511, 1396914, 1479979, 1567983, 1661220, 1760002, 1864657, 1975536, 2093007, 2217464, 2349321, 2489019, 2637024, 2793830, 2959960, 3135968, 3322443, 3520006, 3729316, 3951073, 4186073, 4434930, 4698645, 4978041, 5274051, 5587663, 5919922, 6271939, 6644889, 7040015, 7458636, 7902150 }; unsigned int readWord(int file) { return (readChar(file)<<0) | (readChar(file)<<8); // | (readChar(file)<<8) | (readChar(file)<<0); } unsigned int readDWord(int file) { return (readChar(file)<<0) | (readChar(file)<<8) | (readChar(file)<<16) | (readChar(file)<<24); } int curr_waveform; struct GWaveform waveforms[256] IBSS_ATTR; struct GWaveform * loadWaveform(int file) { struct GWaveform * wav = &waveforms[curr_waveform++]; rb->memset(wav, 0, sizeof(struct GWaveform)); wav->name=readData(file, 7); /* printf("\nWAVE NAME = [%s]", wav->name); */ wav->fractions=readChar(file); wav->wavSize=readDWord(file); wav->startLoop=readDWord(file); wav->endLoop=readDWord(file); wav->sampRate=readWord(file); wav->lowFreq=readDWord(file); wav->highFreq=readDWord(file); wav->rootFreq=readDWord(file); wav->tune=readWord(file); wav->balance=readChar(file); wav->envRate=readData(file, 6); wav->envOffset=readData(file, 6); wav->tremSweep=readChar(file); wav->tremRate=readChar(file); wav->tremDepth=readChar(file); wav->vibSweep=readChar(file); wav->vibRate=readChar(file); wav->vibDepth=readChar(file); wav->mode=readChar(file); wav->scaleFreq=readWord(file); wav->scaleFactor=readWord(file); /* printf("\nScaleFreq = %d ScaleFactor = %d RootFreq = %d", wav->scaleFreq, wav->scaleFactor, wav->rootFreq); */ wav->res=readData(file, 36); wav->data=readData(file, wav->wavSize); wav->numSamples = wav->wavSize / 2; wav->startLoop = wav->startLoop >> 1; wav->endLoop = wav->endLoop >> 1; unsigned int a=0; /* half baked 8 bit conversion UNFINISHED*/ /* if(wav->mode & 1 == 0) //Whoops, 8 bit { wav->numSamples = wav->wavSize; //Allocate a block for the rest of it //It should end up right after the previous one. wav->wavSize = wav->wavSize * 2; void * foo = allocate(wav->wavSize); for(a=0; a<1000; a++) printf("\n!!!!!!!!!!!!!!!!!!!!!!!!!!!"); for(a=wav->wavSize-1; a>0; a-=2) { } // int b1=wf->data[s]+((wf->mode & 2) << 6); // return b1<<8; } */ #ifdef ROCKBOX_BIG_ENDIAN /* Byte-swap if necessary. Gus files are little endian */ for(a=0; anumSamples; a++) { ((unsigned short *) wav->data)[a] = letoh16(((unsigned short *) wav->data)[a]); } #endif /* Convert unsigned to signed by subtracting 32768 */ if(wav->mode & 2) { for(a=0; anumSamples; a++) ((short *) wav->data)[a] = ((unsigned short *) wav->data)[a] - 32768; } return wav; } int selectWaveform(struct GPatch * pat, int midiNote) { /* We divide by 100 here because everyone's freq formula is slightly different */ unsigned int tabFreq = gustable[midiNote]/100; /* Comparison */ unsigned int a=0; for(a=0; anumWaveforms; a++) { if(pat->waveforms[a]->lowFreq/100 <= tabFreq && pat->waveforms[a]->highFreq/100 >= tabFreq) { return a; } } return 0; } struct GPatch * gusload(char * filename) { struct GPatch * gp = (struct GPatch *)malloc(sizeof(struct GPatch)); rb->memset(gp, 0, sizeof(struct GPatch)); int file = rb->open(filename, O_RDONLY); if(file == -1) { char message[50]; rb->snprintf(message, 50, "Error opening %s", filename); rb->splash(HZ*2, message); return NULL; } gp->header=readData(file, 12); gp->gravisid=readData(file, 10); gp->desc=readData(file, 60); gp->inst=readChar(file); gp->voc=readChar(file); gp->chan=readChar(file); gp->numWaveforms=readWord(file); gp->vol=readWord(file); gp->datSize=readDWord(file); gp->res=readData(file, 36); gp->instrID=readWord(file); gp->instrName=readData(file,16); gp->instrSize=readDWord(file); gp->layers=readChar(file); gp->instrRes=readData(file,40); gp->layerDup=readChar(file); gp->layerID=readChar(file); gp->layerSize=readDWord(file); gp->numWaves=readChar(file); gp->layerRes=readData(file,40); /* printf("\nFILE: %s", filename); */ /* printf("\nlayerSamples=%d", gp->numWaves); */ int a=0; for(a=0; anumWaves; a++) gp->waveforms[a] = loadWaveform(file); /* printf("\nPrecomputing note table"); */ for(a=0; a<128; a++) { gp->noteTable[a] = selectWaveform(gp, a); } rb->close(file); return gp; }