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nolibgs_hello_worlds
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nolibgs_hello_worlds/hello_multi_xa/hello_multi_xa.c

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// XA multi sample playback example
//
// Use an interleaved XA file to store multiple sound effects and use pre-calculated offset to play them back.
// Use up, down, left, right, triangle, cross, circle, square to play various samples.
// If this seems complicated, first study the simple XA playback example : https://github.com/ABelliqueux/nolibgs_hello_worlds/tree/main/hello_xa
//
// base on `psyq/addons/scee/CD/XAPLAYER`
// Refs : http://psx.arthus.net/code/XA/XATUT.pdf
// http://psx.arthus.net/code/XA/xatut.zip
// http://psx.arthus.net/code/XA/XA%20ADPCM%20documentation.txt
// Schnappy 2021
#include <sys/types.h>
#include <stdio.h>
#include <libgte.h>
#include <libetc.h>
#include <libgpu.h>
// CD library
#include <libcd.h>
// SPU library
#include <libspu.h>
#define VMODE 0 // Video Mode : 0 : NTSC, 1: PAL
#define SCREENXRES 320 // Screen width
#define SCREENYRES 240 + (VMODE << 4) // Screen height : If VMODE is 0 = 240, if VMODE is 1 = 256
#define CENTERX SCREENXRES/2 // Center of screen on x
#define CENTERY SCREENYRES/2 // Center of screen on y
#define MARGINX 0 // margins for text display
#define MARGINY 32
#define FONTSIZE 8 * 16 // Text Field Height
DISPENV disp[2]; // Double buffered DISPENV and DRAWENV
DRAWENV draw[2];
short db = 0; // index of which buffer is used, values 0, 1
// SPU attributes
SpuCommonAttr spuSettings;
#define CD_SECTOR_SIZE 2048
// XA
// Sector offset for XA data 4: simple speed, 8: double speed
#define XA_CHANNELS 8
#define XA_CDSPEED XA_CHANNELS >> 2
// Number of XA samples ( != # of XA files )
#define XA_TRACKS 8
typedef struct XAsound {
u_int id;
u_int size;
// We can find size in sector : size / 2336, start value begins at 23, end value is at start + offset ( (size / 2336)-1 * #channels )
// subsequent start value have an 8 bytes offset (n-1.end + 8)
u_char file, channel;
u_int start, end;
int cursor;
} XAsound;
typedef struct XAbank {
u_int index;
int offset;
XAsound samples[];
} XAbank;
XAbank soundBank = {
8,
0,
{
// channel 5
// id size file channel start end cursor
{ 0, 18688, 0, 5, 0, 56, -1 },
{ 1, 44384, 0, 5 , 144, 288, -1 },
// channel 6
{ 2, 32704, 0, 6 , 0, 104, -1 },
{ 3, 56064, 0, 6 , 196, 380, -1 },
{ 4, 53728, 0, 6 , 468, 644, -1 },
// channel 7
{ 5, 84096, 0, 7 , 0, 260, -1 },
{ 6, 16352, 0, 7 , 368, 440, -1 },
// channel 8
{ 7, 114464, 0, 8 , 0, 384, -1 }
}
};
// XA file to load
static char * loadXA = "\\INTER8.XA;1";
// File informations : pos, size, name
CdlFILE XAPos = {0};
// CD filter
CdlFILTER filter;
// File position in m/s/f
CdlLOC loc;
void init(void)
{
ResetGraph(0); // Initialize drawing engine with a complete reset (0)
SetDefDispEnv(&disp[0], 0, 0 , SCREENXRES, SCREENYRES); // Set display area for both &disp[0] and &disp[1]
SetDefDispEnv(&disp[1], 0, SCREENYRES, SCREENXRES, SCREENYRES); // &disp[0] is on top of &disp[1]
SetDefDrawEnv(&draw[0], 0, SCREENYRES, SCREENXRES, SCREENYRES); // Set draw for both &draw[0] and &draw[1]
SetDefDrawEnv(&draw[1], 0, 0 , SCREENXRES, SCREENYRES); // &draw[0] is below &draw[1]
// Set video mode
if (VMODE){ SetVideoMode(MODE_PAL);}
SetDispMask(1); // Display on screen
setRGB0(&draw[0], 50, 50, 50); // set color for first draw area
setRGB0(&draw[1], 50, 50, 50); // set color for second draw area
draw[0].isbg = 1; // set mask for draw areas. 1 means repainting the area with the RGB color each frame
draw[1].isbg = 1;
PutDispEnv(&disp[db]); // set the disp and draw environnments
PutDrawEnv(&draw[db]);
FntLoad(960, 0); // Load font to vram at 960,0(+128)
FntOpen(MARGINX, MARGINY, SCREENXRES - MARGINX * 2, FONTSIZE, 0, 512 ); // FntOpen(x, y, width, height, black_bg, max. nbr. chars
}
void display(void)
{
DrawSync(0); // Wait for all drawing to terminate
VSync(0); // Wait for the next vertical blank
PutDispEnv(&disp[db]); // set alternate disp and draw environnments
PutDrawEnv(&draw[db]);
db = !db; // flip db value (0 or 1)
}
void spuSetup(SpuCommonAttr * spuSettings)
{
// Init Spu
SpuInit();
// Set master & CD volume to max
spuSettings->mask = (SPU_COMMON_MVOLL | SPU_COMMON_MVOLR | SPU_COMMON_CDVOLL | SPU_COMMON_CDVOLR | SPU_COMMON_CDMIX);
spuSettings->mvol.left = 0x6000;
spuSettings->mvol.right = 0x6000;
spuSettings->cd.volume.left = 0x6000;
spuSettings->cd.volume.right = 0x6000;
// Enable CD input ON
spuSettings->cd.mix = SPU_ON;
// Apply settings
SpuSetCommonAttr(spuSettings);
// Set transfer mode
SpuSetTransferMode(SPU_TRANSFER_BY_DMA);
}
void XAsetup()
{
u_char param[4];
// ORing the parameters we need to set ; drive speed, ADPCM play, Subheader filter, sector size
// If using CdlModeSpeed(Double speed), you need to load an XA file that has 8 channels.
// In single speed, a 4 channels XA is to be used.
param[0] = CdlModeSpeed|CdlModeRT|CdlModeSF|CdlModeSize1;
// Issue primitive command to CD-ROM system (Blocking-type)
// Set the parameters above
CdControlB(CdlSetmode, param, 0);
// Pause at current pos
CdControlF(CdlPause,0);
}
int main(void)
{
// Init display
init();
// Set SPU
spuSetup(&spuSettings);
// Init CD system
CdInit();
// Pad
PadInit(0);
// Load XA file from cd
// Find XA file pos
CdSearchFile( &XAPos, loadXA);
// Set cd head to start of file
soundBank.offset = CdPosToInt(&XAPos.pos);
// Set cd XA playback parameters and pause cd
XAsetup();
// Pad variables to avoid multifire
int pad, oldpad;
// Keep track of XA Sample currently playing
int sample = -1;
while (1) // infinite loop
{
// if sample is set
if (sample != -1 ){
// Begin XA file playback...
// if sample's cursor is 0
if (soundBank.samples[sample].cursor == 0){
// Convert sector number to CD position in min/second/frame and set CdlLOC accordingly.
CdIntToPos( soundBank.samples[sample].start + soundBank.offset , &loc);
// Send CDROM read command
CdControlF(CdlReadS, (u_char *)&loc);
// Set playing flag
}
// if sample's cursor is close to sample's end position, stop playback
if ((soundBank.samples[sample].cursor += XA_CDSPEED) >= soundBank.samples[sample].end - soundBank.samples[sample].start ){
CdControlF(CdlStop,0);
soundBank.samples[sample].cursor = -1;
sample = -1;
}
}
// Pad
// Use up, down, left, right, triangle, cross, circle, square to play various samples
// Read pad values
pad = PadRead(0);
// Left
if (pad & PADLleft && !(oldpad & PADLleft)){
// Set sample ID for playback
sample = 7;
// Change file/channel in the filter struct
filter.chan = soundBank.samples[sample].channel;
filter.file = soundBank.samples[sample].file;
// Set filter
CdControlF(CdlSetfilter, (u_char *)&filter);
// Reset sample's cursor
soundBank.samples[sample].cursor = 0;
// Store pad value for release
oldpad = pad;
}
if (pad & PADLright && !(oldpad & PADLright)){
sample = 6;
filter.chan = soundBank.samples[sample].channel;
filter.file = soundBank.samples[sample].file;
// Set filter
CdControlF(CdlSetfilter, (u_char *)&filter);
soundBank.samples[sample].cursor = 0;
oldpad = pad;
}
if (pad & PADLup && !(oldpad & PADLup)){
sample = 5;
filter.chan = soundBank.samples[sample].channel;
filter.file = soundBank.samples[sample].file;
// Set filter
CdControlF(CdlSetfilter, (u_char *)&filter);
soundBank.samples[sample].cursor = 0;
oldpad = pad;
}
if (pad & PADLdown && !(oldpad & PADLdown)){
sample = 4;
filter.chan = soundBank.samples[sample].channel;
filter.file = soundBank.samples[sample].file;
// Set filter
CdControlF(CdlSetfilter, (u_char *)&filter);
soundBank.samples[sample].cursor = 0;
oldpad = pad;
}
if (pad & PADRleft && !(oldpad & PADRleft)){
sample = 3;
filter.chan = soundBank.samples[sample].channel;
filter.file = soundBank.samples[sample].file;
// Set filter
CdControlF(CdlSetfilter, (u_char *)&filter);
soundBank.samples[sample].cursor = 0;
oldpad = pad;
}
if (pad & PADRright && !(oldpad & PADRright)){
sample = 2;
filter.chan = soundBank.samples[sample].channel;
filter.file = soundBank.samples[sample].file;
// Set filter
CdControlF(CdlSetfilter, (u_char *)&filter);
soundBank.samples[sample].cursor = 0;
oldpad = pad;
}
if (pad & PADRup && !(oldpad & PADRup)){
sample = 1;
filter.chan = soundBank.samples[sample].channel;
filter.file = soundBank.samples[sample].file;
// Set filter
CdControlF(CdlSetfilter, (u_char *)&filter);
soundBank.samples[sample].cursor = 0;
oldpad = pad;
}
if (pad & PADRdown && !(oldpad & PADRdown)){
sample = 0;
filter.chan = soundBank.samples[sample].channel;
filter.file = soundBank.samples[sample].file;
// Set filter
CdControlF(CdlSetfilter, (u_char *)&filter);
soundBank.samples[sample].cursor = 0;
oldpad = pad;
}
// Reset oldpad
if (!(pad & PADRdown) ||
!(pad & PADRup) ||
!(pad & PADRleft) ||
!(pad & PADRright) ||
!(pad & PADLdown) ||
!(pad & PADLup) ||
!(pad & PADLleft) ||
!(pad & PADLright)
){oldpad = pad;}
FntPrint("Hello multi XA ! %d\n", VSync(-1));
FntPrint("Use the pad to play various samples.\n");
for (int i=0;i<soundBank.index;i++){
if (i == sample){
FntPrint(">");
}
FntPrint("%d: %d %d\n", i, soundBank.samples[i].start, soundBank.samples[i].end);
}
FntPrint("Cursor: %d\n", soundBank.samples[sample].cursor );
FntPrint("File offset: %d\n", soundBank.offset );
FntFlush(-1); // Draw print stream
display(); // Execute display()
}
return 0;
}
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