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DS development > want to stream audio within game

#169503 - iainprice - Sat Jul 18, 2009 6:43 pm

Hi,

I want to stream audio, either wav or mp3 within a game. I know there are some out there but they are very complicated and not easy to integrate into a game, they all seem to be stand alone.

Any ideas?

#169509 - hacker013 - Sun Jul 19, 2009 8:02 pm

The wave streamer from discostew ?
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#169564 - iainprice - Thu Jul 23, 2009 9:04 pm

Great bit of code.... have put it in game and it's working, I ma just converting it to work with efs

but... it messes up my sound effects, how can I play samples over the main music?

#169565 - Lazy1 - Thu Jul 23, 2009 9:50 pm

I had that problem, if you are using maxmod you must lock some channels first if you plan on using libnds's sound playback functions.
http://www.maxmod.org/ref/functions/mmLockChannels.html

[Edit]
Though there is probably a better solution than that, maybe someone with a bit more experience can help you out.

#169566 - SteveH - Fri Jul 24, 2009 12:39 am

Search this forum (the entire forum) for MS-ADPCM streamer or IMA-ADPCM streamer - there's some source code that will stream wav files from your card with little overhead - I'm looking at the MS-ADPCM at the moment, and it uses about 8 - 16 scanlines to stream the wav file.

#169573 - iainprice - Fri Jul 24, 2009 3:04 pm

locking doesn't seem to make any difference at the moment.....

#169804 - hacker013 - Tue Aug 04, 2009 1:19 pm

SteveH wrote:
Search this forum (the entire forum) for MS-ADPCM streamer or IMA-ADPCM streamer - there's some source code that will stream wav files from your card with little overhead - I'm looking at the MS-ADPCM at the moment, and it uses about 8 - 16 scanlines to stream the wav file.


he is already using that >.> the streamer from discostew but maybe his code can be alternated so for every next wave it will lock diffrent channels O_o
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Let the nds be with you.

#170458 - iainprice - Sun Sep 27, 2009 3:16 pm

I am still having no joy with streaming sound and sound effects....

I use the adpcm streamer and build in a raw but the sound effect just makes a click and nothing else.....

[code]/***********************************************************
* ima-adpcm demo by Discostew
* player and decoder template by mukunda
***********************************************************/

#include <nds.h>
#include <maxmod9.h>
#include <fat.h>
#include "directory.h"
#include "ima_adpcm.h"
#include "rifle_raw.h"

IMA_Adpcm_Player player;
bool player_loop = false;

char in_play[] = "|/-\\";
int in_play_delay = 4;

bool dir_filetype = true;

int Execute_Directory_File( char *filename )
{
return player.play( filename, player_loop, false );
}

/******************************************************
* main
*
* Program Entry Point
******************************************************/
int main(void) {
consoleDemoInit();
BG_PALETTE_SUB[0] = 13<<10;

if( !fatInitDefault() ) {
iprintf( "FAT is required.\n" );
while(1) swiWaitForVBlank();
}

mm_ds_system sys;
sys.mod_count = 0;
sys.samp_count = 0;
sys.mem_bank = 0;
sys.fifo_channel = FIFO_MAXMOD;
mmInit( &sys );

LLG_Directory directory( "wav", Execute_Directory_File );

SetYtrigger( 0 );
irqEnable( IRQ_VCOUNT );

int background_sine = 0;
int cur_in_play = 0;
int cur_in_play_delay = 0;
keysSetRepeat( 20, 3 );
swiWaitForVBlank();
while(1)
{
scanKeys();
int keysd = keysDown();
int keysr = keysDownRepeat();
if( keysd & KEY_A ) {
directory.execute();
}

if( keysd & KEY_B ) {
player.stop();
}

if( keysd & KEY_X ) {
if( player.ispaused() )
player.resume();
else
player.pause();
}

if( keysd & KEY_Y ) {
player_loop = !player_loop;
}

if( keysr & KEY_UP ) {
directory.select_prior();
}

if( keysr & KEY_LEFT ) {
//my bit to play sound effect
soundPlaySample(rifle_raw, SoundFormat_8Bit, rifle_raw_size, 11025, 127, 64, false, 0);
}

if( keysr & KEY_DOWN ) {
directory.select_next();
}

if( keysHeld() & KEY_L ) {
player.setvolume( player.getvolume() - 1 );
}
if( keysHeld() & KEY_R ) {
player.setvolume( player.getvolume() + 1 );
}
if( keysd & KEY_START ) {
directory.parent_dir();
}

if( keysd & KEY_SELECT ) {
dir_filetype = !dir_filetype;
if( dir_filetype )
directory.set_filter( "wav" );
else
directory.set_filter( "" );
}

iprintf( "\x1b[23;0H%d ", player.getvolume() );
iprintf( "\x1b[23;6H%s", ( dir_filetype ? "WAV files" : "All files" ));
iprintf( "\x1b[23;21H%s", ( player_loop ? " Loop " : "One shot" ));
if( player.isactive() ) {
iprintf( "\x1b[11;31H%c", ( player.ispaused() ? '-' : in_play[ cur_in_play ]));
cur_in_play_delay++;
if( cur_in_play_delay >= in_play_delay )
{
cur_in_play_delay = 0;
cur_in_play++;
if( cur_in_play >= 4 )
cur_in_play = 0;
}
}
else
{
iprintf( "\x1b[11;31H " );
cur_in_play_delay = 0;
}

// wait until display line 0
swiIntrWait( 0, IRQ_VCOUNT );

// update stream
player.update();

// set backdrop to blueness (some lines were drawn with red to show cpu usage)
BG_PALETTE_SUB[0] = (12+(sinLerp(background_sine & 65535)>>9))<<10;
background_sine += 200;

swiWaitForVBlank();

// set backdrop to RED
BG_PALETTE_SUB[0] = 0x1f;

}

return 0;
}[/code]