需要一个类似这个函数的函数！！！
int DSound_Load_WAV(char *filename, int control_flags)
{
// this function loads a .wav file, sets up the directsound
// buffer and loads the data into memory, the function returns
// the id number of the sound
HMMIO hwav; // handle to wave file
MMCKINFO parent, // parent chunk
child; // child chunk
WAVEFORMATEX wfmtx; // wave format structure
int sound_id = -1, // id of sound to be loaded
index; // looping variable
UCHAR *snd_buffer, // temporary sound buffer to hold voc data
*audio_ptr_1=NULL, // data ptr to first write buffer
*audio_ptr_2=NULL; // data ptr to second write buffer
DWORD audio_length_1=0, // length of first write buffer
audio_length_2=0; // length of second write buffer
// step one: are there any open id's ?
for (index=0; index < MAX_SOUNDS; index++)
{
// make sure this sound is unused
if (sound_fx[index].state==SOUND_NULL)
{
sound_id = index;
break;
} // end if
} // end for index
// did we get a free id?
if (sound_id==-1)
return(-1);
// set up chunk info structure
parent.ckid = (FOURCC)0;
parent.cksize = 0;
parent.fccType = (FOURCC)0;
parent.dwDataOffset = 0;
parent.dwFlags = 0;
// copy data
child = parent;
// open the WAV file
if ((hwav = mmioOpen(filename, NULL, MMIO_READ | MMIO_ALLOCBUF))==NULL)
return(-1);
// descend into the RIFF
parent.fccType = mmioFOURCC('W', 'A', 'V', 'E');
if (mmioDescend(hwav, &parent, NULL, MMIO_FINDRIFF))
{
// close the file
mmioClose(hwav, 0);
// return error, no wave section
return(-1);
} // end if
// descend to the WAVEfmt
child.ckid = mmioFOURCC('f', 'm', 't', ' ');
if (mmioDescend(hwav, &child, &parent, 0))
{
// close the file
mmioClose(hwav, 0);
// return error, no format section
return(-1);
} // end if
// now read the wave format information from file
if (mmioRead(hwav, (char *)&wfmtx, sizeof(wfmtx)) != sizeof(wfmtx))
{
// close file
mmioClose(hwav, 0);
// return error, no wave format data
return(-1);
} // end if
// make sure that the data format is PCM
if (wfmtx.wFormatTag != WAVE_FORMAT_PCM)
{
// close the file
mmioClose(hwav, 0);
// return error, not the right data format
return(-1);
} // end if
// now ascend up one level, so we can access data chunk
if (mmioAscend(hwav, &child, 0))
{
// close file
mmioClose(hwav, 0);
// return error, couldn't ascend
return(-1);
} // end if
// descend to the data chunk
child.ckid = mmioFOURCC('d', 'a', 't', 'a');
if (mmioDescend(hwav, &child, &parent, MMIO_FINDCHUNK))
{
// close file
mmioClose(hwav, 0);
// return error, no data
return(-1);
} // end if
// finally!!!! now all we have to do is read the data in and
// set up the directsound buffer
// allocate the memory to load sound data
snd_buffer = (UCHAR *)malloc(child.cksize);
// read the wave data
mmioRead(hwav, (char *)snd_buffer, child.cksize);
// close the file
mmioClose(hwav, 0);
// set rate and size in data structure
sound_fx[sound_id].rate = wfmtx.nSamplesPerSec;
sound_fx[sound_id].size = child.cksize;
sound_fx[sound_id].state = SOUND_LOADED;
// set up the format data structure
memset(&pcmwf, 0, sizeof(WAVEFORMATEX));
pcmwf.wFormatTag = WAVE_FORMAT_PCM; // pulse code modulation
pcmwf.nChannels = 1; // mono
pcmwf.nSamplesPerSec = 11025; // always this rate
pcmwf.nBlockAlign = 1;
pcmwf.nAvgBytesPerSec = pcmwf.nSamplesPerSec * pcmwf.nBlockAlign;
pcmwf.wBitsPerSample = 8;
pcmwf.cbSize = 0;
// prepare to create sounds buffer
dsbd.dwSize = sizeof(DSBUFFERDESC);
dsbd.dwFlags = control_flags | DSBCAPS_STATIC | DSBCAPS_LOCSOFTWARE;
dsbd.dwBufferBytes = child.cksize;
dsbd.lpwfxFormat = &pcmwf;
// create the sound buffer
if (FAILED(lpds->CreateSoundBuffer(&dsbd,&sound_fx[sound_id].dsbuffer,NULL)))
{
// release memory
free(snd_buffer);
// return error
return(-1);
} // end if
// copy data into sound buffer
if (FAILED(sound_fx[sound_id].dsbuffer->Lock(0,
child.cksize,
(void **) &audio_ptr_1,
&audio_length_1,
(void **)&audio_ptr_2,
&audio_length_2,
DSBLOCK_FROMWRITECURSOR)))
return(0);
// copy first section of circular buffer
memcpy(audio_ptr_1, snd_buffer, audio_length_1);
// copy last section of circular buffer
memcpy(audio_ptr_2, (snd_buffer+audio_length_1),audio_length_2);
// unlock the buffer
if (FAILED(sound_fx[sound_id].dsbuffer->Unlock(audio_ptr_1,
audio_length_1,
audio_ptr_2,
audio_length_2)))
return(0);
// release the temp buffer
free(snd_buffer);
// return id
return(sound_id);
} // end DSound_Load_WAV
