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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2005 Stepan Moskovchenko
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* 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; a<wav->numSamples; 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; a<wav->numSamples; 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; a<pat->numWaveforms; 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; a<gp->numWaves; 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;
}
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