DirectAudio Problems | GameDev.net

Hi, I''m coding an audio system using DirectMusic 8. I want a list of channels and a list of samples. Each sample can be played into any channel (each new sample stops the previous sample). Then I want to be able to stop a channel without affect other channels (where the same sample could being in play) So I decided to use a list of IDirectMusicPerformance8 as channels and a list of IDirectMusicSegment8 as sample.

  

/**
 * the single channel
 */
typedef struct tagChannel 
{
    IDirectMusicPerformance8 *perf;  
    IDirectMusicAudioPath8   *path;  
    IDirectSoundBuffer8      *buff;  
} Channel;

/**
 * list of channels
 */
static Channel *channels;
/**
 * list of samples
 */
static IDirectMusicSegment8 **samples;

Then I create my two list and I''inizialize every single channel in a for loop using the following function

  
static int initChannel(Channel *c)
{
    //creo l''oggetto performance

    if(FAILED(CoCreateInstance(&CLSID_DirectMusicPerformance, 
    NULL,
    CLSCTX_INPROC, 
    &IID_IDirectMusicPerformance8, 
    (void **)&c->perf)))
        return 0;

    if(FAILED(c->perf->lpVtbl->InitAudio(c->perf,
    NULL, //IDirectMusic

    NULL, //IDirectSound

    NULL,
    DMUS_APATH_DYNAMIC_STEREO,
    64,
    DMUS_AUDIOF_ALL,
    NULL)))
        return 0;
    
    //adesso creo l''audio path su cui suonare

    if(FAILED(c->perf->lpVtbl->CreateStandardAudioPath(
    c->perf,
    DMUS_APATH_DYNAMIC_STEREO,
    64,
    TRUE,
    &c->path)))
        return 0;

    //adesso recupero il SoundBuffer per gli effetti

    if(FAILED(c->path->lpVtbl->GetObjectInPath(c->path, 
    DMUS_PCHANNEL_ALL, DMUS_PATH_BUFFER, 0, &GUID_NULL, 0, 
    &IID_IDirectSoundBuffer8, (void **)&c->buff)))
        return 0;
    
    return 1;
}

Then when I load a sample (using IDirectMusicLoader8) into IDirectMusicSegment8 I download it in every channel. The problem is that only the first channel created play (I use a log file and no error is thrown when I play Segment in other channels, but there isn''t sound) Could someone help me, please?! Sorry for my English but I''m Italian gnolo

Topic Locked