185 lines
6.8 KiB
C
185 lines
6.8 KiB
C
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// XA track playback example
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// base on `psyq/addons/scee/CD/XAPLAYER`
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// Refs : http://psx.arthus.net/code/XA/XATUT.pdf
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// http://psx.arthus.net/code/XA/xatut.zip
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// http://psx.arthus.net/code/XA/XA%20ADPCM%20documentation.txt
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// based on Lameguy64's tutorial : http://lameguy64.net/svn/pstutorials/chapter1/1-display.html
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#include <sys/types.h>
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#include <stdio.h>
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#include <libgte.h>
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#include <libetc.h>
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#include <libgpu.h>
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// CD library
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#include <libcd.h>
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// SPU library
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#include <libspu.h>
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#define VMODE 0 // Video Mode : 0 : NTSC, 1: PAL
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#define SCREENXRES 320 // Screen width
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#define SCREENYRES 240 + (VMODE << 4) // Screen height : If VMODE is 0 = 240, if VMODE is 1 = 256
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#define CENTERX SCREENXRES/2 // Center of screen on x
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#define CENTERY SCREENYRES/2 // Center of screen on y
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#define MARGINX 0 // margins for text display
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#define MARGINY 32
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#define FONTSIZE 8 * 7 // Text Field Height
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DISPENV disp[2]; // Double buffered DISPENV and DRAWENV
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DRAWENV draw[2];
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short db = 0; // index of which buffer is used, values 0, 1
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// SPU attributes
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SpuCommonAttr spuSettings;
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#define CD_SECTOR_SIZE 2048
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// XA
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// Sector offset for XA data 4: simple speed, 8: double speed
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#define XA_SECTOR_OFFSET 4
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// Number of XA files
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#define XA_TRACKS 1
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// Number of populated XA streams/channels in each XA file
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#define INDEXES_IN_XA 1
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#define TOTAL_TRACKS (XA_TRACKS*INDEXES_IN_XA)
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typedef struct {
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int start;
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int end;
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} XA_TRACK;
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// Declare an array of XA_TRACK
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XA_TRACK XATrack[XA_TRACKS];
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// Name of file to load
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static char * loadXA = "\\INTER4.XA;1";
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CdlFILE XAPos = {0};
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// Start and end position of XA data, in sectors
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static int StartPos, EndPos;
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// Current pos in file
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static int CurPos = -1;
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// Playback status : 0 not playing, 1 playing
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static int gPlaying = 0;
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// Current XA channel
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static char channel = 0;
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void init(void)
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{
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ResetGraph(0); // Initialize drawing engine with a complete reset (0)
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SetDefDispEnv(&disp[0], 0, 0 , SCREENXRES, SCREENYRES); // Set display area for both &disp[0] and &disp[1]
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SetDefDispEnv(&disp[1], 0, SCREENYRES, SCREENXRES, SCREENYRES); // &disp[0] is on top of &disp[1]
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SetDefDrawEnv(&draw[0], 0, SCREENYRES, SCREENXRES, SCREENYRES); // Set draw for both &draw[0] and &draw[1]
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SetDefDrawEnv(&draw[1], 0, 0 , SCREENXRES, SCREENYRES); // &draw[0] is below &draw[1]
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// Set video mode
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if (VMODE){ SetVideoMode(MODE_PAL);}
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SetDispMask(1); // Display on screen
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setRGB0(&draw[0], 50, 50, 50); // set color for first draw area
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setRGB0(&draw[1], 50, 50, 50); // set color for second draw area
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draw[0].isbg = 1; // set mask for draw areas. 1 means repainting the area with the RGB color each frame
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draw[1].isbg = 1;
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PutDispEnv(&disp[db]); // set the disp and draw environnments
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PutDrawEnv(&draw[db]);
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FntLoad(960, 0); // Load font to vram at 960,0(+128)
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FntOpen(MARGINX, SCREENYRES - MARGINY - FONTSIZE, SCREENXRES - MARGINX * 2, FONTSIZE, 0, 280 ); // FntOpen(x, y, width, height, black_bg, max. nbr. chars
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}
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void display(void)
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{
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DrawSync(0); // Wait for all drawing to terminate
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VSync(0); // Wait for the next vertical blank
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PutDispEnv(&disp[db]); // set alternate disp and draw environnments
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PutDrawEnv(&draw[db]);
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db = !db; // flip db value (0 or 1)
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}
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int main(void)
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{
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// Init display
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init();
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// SPU setup
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// Init Spu
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SpuInit();
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// Set master & CD volume to max
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spuSettings.mask = (SPU_COMMON_MVOLL | SPU_COMMON_MVOLR | SPU_COMMON_CDVOLL | SPU_COMMON_CDVOLR | SPU_COMMON_CDMIX);
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spuSettings.mvol.left = 0x6000;
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spuSettings.mvol.right = 0x6000;
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spuSettings.cd.volume.left = 0x6000;
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spuSettings.cd.volume.right = 0x6000;
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// Enable CD input ON
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spuSettings.cd.mix = SPU_ON;
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// Apply settings
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SpuSetCommonAttr(&spuSettings);
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// Set transfer mode
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SpuSetTransferMode(SPU_TRANSFER_BY_DMA);
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// Init CD system
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CdInit();
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// Optional : Set CD Attenuation volume
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//
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// CdlATV cd_vol;
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// cd_vol.val0 = cd_vol.val1 = cd_vol.val2 = cd_vol.val3 = 0x40;
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// CdMix(&cd_vol);
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//
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// Load XA file from cd
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// Find XA file pos
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CdSearchFile( &XAPos, loadXA);
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XATrack[0].start = CdPosToInt(&XAPos.pos);
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XATrack[0].end = XATrack[0].start + (XAPos.size/CD_SECTOR_SIZE) - 1;
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StartPos = XATrack[0].start;
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EndPos = XATrack[0].end;
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// XA setup
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u_char param[4];
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// ORing the parameters we need to set ; drive speed, ADPCM play, Subheader filter, sector size
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param[0] = CdlModeSpeed|CdlModeRT|CdlModeSF|CdlModeSize1;
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// Issue primitive command to CD-ROM system (Blocking-type)
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// Set the parameters above
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CdControlB(CdlSetmode, param, 0);
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// Pause at current pos
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CdControlF(CdlPause,0);
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// Set filter
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// This specifies the file and channel number to actually read data from.
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CdlFILTER filter;
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// Use file 1, channel 0
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filter.file = 1;
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filter.chan = channel;
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// Set filter
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CdControlF(CdlSetfilter, (u_char *)&filter);
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// Position of file on CD
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CdlLOC loc;
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// Set CurPos to StartPos
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CurPos = StartPos;
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while (1) // infinite loop
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{
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// Begin XA file playback
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if (gPlaying == 0 && CurPos == StartPos){
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// Convert sector number to CD position in min/second/frame and set CdlLOC accordingly.
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CdIntToPos(StartPos, &loc);
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// Send CDROM read command
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CdControlF(CdlReadS, (u_char *)&loc);
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// Set playing flag
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gPlaying = 1;
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}
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// When endPos is reached, set playing flag to 0
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if ((CurPos += XA_SECTOR_OFFSET) >= EndPos){
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gPlaying = 0;
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}
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// If XA file end is reached, stop playback
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if ( gPlaying == 0 && CurPos >= EndPos ){
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// Stop XA playback
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// Stop CD playback
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CdControlF(CdlStop,0);
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// Optional
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// Reset parameters
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// param[0] = CdlModeSpeed;
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// Set CD mode
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// CdControlB(CdlSetmode, param, 0);
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// Switch to next channel and start play back
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channel = !channel;
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filter.chan = channel;
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// Set filter
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CdControlF(CdlSetfilter, (u_char *)&filter);
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CurPos = StartPos;
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}
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FntPrint("Hello XA ! %d\n", VSync(-1));
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FntPrint("Start, End Pos: %d %d\n", StartPos, EndPos);
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FntPrint("Current Pos: %d\n", CurPos );
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FntPrint("Playback status: %d\n", gPlaying );
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FntFlush(-1); // Draw printe stream
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display(); // Execute display()
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}
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return 0;
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}
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