test_music.c
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/*************************************************************
test_music.c : Nintendo 64 Music Tools Library Sample
(c) Copyright 1998, Software Creations (Holdings) Ltd.
Version 3.11
FXCHANGE demo music related file. This demo illustrates how
to change the audio library FX type.
**************************************************************/
/* include system header files */
#ifndef F3DEX_GBI
#define F3DEX_GBI
#endif
#include <ultra64.h>
#include <libmus.h>
/* include current header file */
#include "test_rom.h"
/* internal function prototypes */
static void DmaRomToRam(void *rom, void *ram, int len);
/*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
[GLOBAL FUNCTION]
InitMusicDriver()
[Explantion]
Download ROM files and initialise the music player.
[Return value]
NONE
*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*/
/* 'makerom' generated labels */
extern char _wbankSegmentRomStart[];
extern char _pbankSegmentRomStart[];
extern char _pbankSegmentRomEnd[];
extern char _tune1SegmentRomStart[];
extern char _tune1SegmentRomEnd[];
/* ROM addresses */
#define WBANK_START _wbankSegmentRomStart
#define PBANK_START _pbankSegmentRomStart
#define PBANK_END _pbankSegmentRomEnd
#define MUSIC1_START _tune1SegmentRomStart
#define MUSIC1_END _tune1SegmentRomEnd
/* permanent RAM buffers */
#define AUDIO_HEAP_SIZE 300000
#define PBANK_SIZE 50000
#define TUNE_SIZE 10000
unsigned char audio_memory [AUDIO_HEAP_SIZE];
unsigned char pointer_buf [PBANK_SIZE];
/* make sure tune is 32bit aligned */
unsigned int tune_buf1 [TUNE_SIZE/sizeof(int)];
void InitMusicDriver(void)
{
musConfig init;
/* download sample .ptr and song .bin file to RAM */
DmaRomToRam(PBANK_START, pointer_buf, PBANK_END-PBANK_START);
DmaRomToRam(MUSIC1_START, tune_buf1, MUSIC1_END-MUSIC1_START);
/* setup configuration structure */
init.control_flag = 0;
init.channels = 28; /* lots of channels! */
init.sched = ≻
init.thread_priority = 12;
init.heap = audio_memory;
init.heap_length = AUDIO_HEAP_SIZE;
init.fifo_length = 64;
init.ptr = pointer_buf;
init.wbk = WBANK_START;
init.default_fxbank = NULL;
init.syn_output_rate = 44100;
init.syn_updates = 256;
init.syn_rsp_cmds = 4096;
init.syn_retraceCount= 1;
init.syn_num_dma_bufs= 36;
init.syn_dma_buf_size= 0x800;
MusInitialize(&init);
}
/*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
[INTERNAL FUNCTION]
DmaRomToRam(rom, ram, len)
[Parameters]
rom address of ROM source
ram address of RAM destination
len number of bytes to transfer
[Explantion]
Download an area of ROM to RAM. Note this function limits the size of any DMA
generated to 16k so as to cause clashes with audio DMAs.
[Return value]
NONE
*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*/
/* avoid DMA clashes */
#define DMA_LEN 16384
static void DmaRomToRam(void *rom, void *ram, int len)
{
OSIoMesg io_mesg;
OSMesg dummyMesg;
int length;
u32 src;
unsigned char *dest;
src = (u32)rom;
dest = ram;
while (len)
{
if (len>DMA_LEN)
length = DMA_LEN;
else
length = len;
osInvalDCache(dest, length);
osPiStartDma(&io_mesg, OS_MESG_PRI_NORMAL, OS_READ, src, dest, length, &dma_queue);
osRecvMesg(&dma_queue, &dummyMesg, OS_MESG_BLOCK);
src+=length;
dest+=length;
len-=length;
}
}
/* end of file */