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doddsound.cpp
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doddsound.cpp
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/*
* Do Or Die© PeRpLeXeD Productions
*
* Programmed By: Matt Reiferson
*
* Module: doddsound.cpp
* Description: DirectSound utility functions
*
*/
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <mmsystem.h>
#include <stdlib.h>
#include <malloc.h>
#include <stdio.h>
#include <io.h>
#include <fcntl.h>
#include <dsound.h>
#include "doddsound.h"
// directsound stuff
LPDIRECTSOUND lpDS; // directsound interface pointer
LPDIRECTSOUNDBUFFER lpDSBPrimary; // the primary mixing buffer
DSBUFFERDESC dsbd; // directsound description
DSCAPS dscaps; // directsound caps
HRESULT dsresult; // general directsound result
DSBCAPS dsbcaps; // directsound buffer caps
pcm_sound sound_fx[MAX_SOUNDS]; // the array of secondary sound buffers
WAVEFORMATEX pcmwf; // generic waveformat structure
int Load_VOC(char *filename)
{
int sound_id = -1, // id of sound to be loaded
index, // looping variable
data_offset, // offset to data part of file
playback_rate, // playback rate as encoded in file
data_length; // length of data
ULONG bytesread = 0, // actual number of bytes read during file read
filelength; // length of file
int file_handle; // general file handle
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;
}
}
// did we get a free id?
if (sound_id == -1) {
return(-1);
}
// step two: load the voc file off disk
if ((file_handle = _open(filename, _O_BINARY | _O_RDONLY)) == -1) {
return(0);
}
// get size of file so we can allocate temporary read buffer
filelength = _filelength(file_handle);
// allocate a large enough temporary buffer
snd_buffer = (UCHAR *)malloc(filelength);
// now read in the data
bytesread = _read(file_handle, snd_buffer, filelength);
// access all values and decode VOC encoding for data fields
data_offset = snd_buffer[20];
playback_rate = (-1000000 / (snd_buffer[data_offset + 4] - 256));
data_length = ((*(int *)(snd_buffer + data_offset)) >> 8);
// set rate and size in data structure
sound_fx[sound_id].rate = playback_rate;
sound_fx[sound_id].size = data_length;
sound_fx[sound_id].state = SOUND_LOADED;
// close the file
_close(file_handle);
// step three: create the sound buffer and copy voc data into buffer
// 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 = DSBCAPS_STATIC | DSBCAPS_LOCSOFTWARE;
dsbd.dwBufferBytes = data_length - NVB_SIZE;
dsbd.lpwfxFormat = &pcmwf;
// create the sound buffer
if (lpDS->CreateSoundBuffer(&dsbd, &sound_fx[sound_id].dsbuffer, NULL) != DS_OK) {
// release memory
free(snd_buffer);
// return error
return(-1);
}
// copy data into sound buffer
if (sound_fx[sound_id].dsbuffer->Lock(0,
data_length - NVB_SIZE,
(void **) &audio_ptr_1,
&audio_length_1,
(void **)&audio_ptr_2,
&audio_length_2,
DSBLOCK_FROMWRITECURSOR) != DS_OK) {
return(0);
}
// copy first section of circular buffer
memcpy(audio_ptr_1, snd_buffer + data_offset + NVB_SIZE, audio_length_1);
// copy last section of circular buffer
memcpy(audio_ptr_2, (snd_buffer + data_offset + NVB_SIZE + audio_length_1), audio_length_2);
// unlock the buffer
if (sound_fx[sound_id].dsbuffer->Unlock(audio_ptr_1,
audio_length_1,
audio_ptr_2,
audio_length_2) != DS_OK) {
return(0);
}
// release the temp buffer
free(snd_buffer);
// return id
return(sound_id);
}
int Load_WAV(char *filename, int control_flags)
{
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;
}
}
// 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);
}
// 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);
}
// 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);
}
// 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);
}
// 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);
}
// 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);
}
// 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 (lpDS->CreateSoundBuffer(&dsbd, &sound_fx[sound_id].dsbuffer, NULL) != DS_OK) {
// release memory
free(snd_buffer);
// return error
return(-1);
}
// copy data into sound buffer
if (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) != DS_OK) {
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 (sound_fx[sound_id].dsbuffer->Unlock(audio_ptr_1,
audio_length_1,
audio_ptr_2,
audio_length_2) != DS_OK) {
return(0);
}
// release the temp buffer
free(snd_buffer);
// return id
return(sound_id);
}
int Replicate_Sound(int source_id)
{
if (source_id != -1) {
// duplicate the sound buffer
// first hunt for an open id
for (int id = 0; id < MAX_SOUNDS; id++) {
// is this sound open?
if (sound_fx[id].state == SOUND_NULL) {
// first make an identical copy
sound_fx[id] = sound_fx[source_id];
// now actually replicate the directsound buffer
if (lpDS->DuplicateSoundBuffer(sound_fx[source_id].dsbuffer, &sound_fx[id].dsbuffer) != DS_OK) {
// reset sound to NULL
sound_fx[id].dsbuffer = NULL;
sound_fx[id].state = SOUND_NULL;
// return error
return(-1);
}
// now fix up id
sound_fx[id].id = id;
// return replicated sound
return(id);
}
}
} else {
return(-1);
}
// else failure
return(-1);
}
int DSInit(HWND hwnd)
{
static int first_time = 1; // used to track the first time the function is entered
int index;
// test for very first time
if (first_time) {
// clear everything out
memset(sound_fx, 0, sizeof(pcm_sound) * MAX_SOUNDS);
// reset first time
first_time = 0;
// create a directsound object
if (DirectSoundCreate(NULL, &lpDS, NULL) != DS_OK) {
return(0);
}
// set cooperation level
if (lpDS->SetCooperativeLevel(hwnd, DSSCL_NORMAL) != DS_OK) {
return(0);
}
}
// initialize the sound fx array
for (index = 0; index < MAX_SOUNDS; index++) {
// test if this sound has been loaded
if (sound_fx[index].dsbuffer) {
// stop the sound
sound_fx[index].dsbuffer->Stop();
// release the buffer
sound_fx[index].dsbuffer->Release();
}
// clear the record out
memset(&sound_fx[index], 0, sizeof(pcm_sound));
// now set up the fields
sound_fx[index].state = SOUND_NULL;
sound_fx[index].id = index;
}
// return sucess
return(1);
}
int DSShutdown(void)
{
// first turn all sounds off
Stop_All_Sounds();
// now release all sound buffers
for (int index = 0; index < MAX_SOUNDS; index++)
if (sound_fx[index].dsbuffer) {
sound_fx[index].dsbuffer->Release();
}
// now release the directsound interface itself
lpDS->Release();
lpDS = NULL;
// return success
return(1);
}
int Play_Sound(int id, int flags, int volume, int rate, int pan)
{
if (sound_fx[id].dsbuffer) {
// reset position to start
if (sound_fx[id].dsbuffer->SetCurrentPosition(0) != DS_OK) {
return(0);
}
// play sound
if (sound_fx[id].dsbuffer->Play(0, 0, flags) != DS_OK) {
return(0);
}
}
// return success
return(1);
}
int Set_Sound_Volume(int id, int vol)
{
if (sound_fx[id].dsbuffer->SetVolume(DSVOLUME_TO_DB(vol)) != DS_OK) {
return(0);
}
// return success
return(1);
}
int Set_Sound_Freq(int id, int freq)
{
if (sound_fx[id].dsbuffer->SetFrequency(freq) != DS_OK) {
return(0);
}
// return success
return(1);
}
int Set_Sound_Pan(int id, int pan)
{
if (sound_fx[id].dsbuffer->SetPan(pan) != DS_OK) {
return(0);
}
// return success
return(1);
}
int Stop_Sound(int id)
{
if (sound_fx[id].dsbuffer) {
sound_fx[id].dsbuffer->Stop();
sound_fx[id].dsbuffer->SetCurrentPosition(0);
}
// return success
return(1);
}
int Delete_All_Sounds(void)
{
for (int index = 0; index < MAX_SOUNDS; index++) {
Delete_Sound(index);
}
// return success always
return(1);
}
int Delete_Sound(int id)
{
// first stop it
if (!Stop_Sound(id)) {
return(0);
}
// now delete it
if (sound_fx[id].dsbuffer) {
// release the com object
sound_fx[id].dsbuffer->Release();
sound_fx[id].dsbuffer = NULL;
}
// return success
return(1);
}
int Stop_All_Sounds(void)
{
for (int index = 0; index < MAX_SOUNDS; index++) {
Stop_Sound(index);
}
// return success
return(1);
}
int Status_Sound(int id)
{
ULONG status;
if (sound_fx[id].dsbuffer) {
// get the status
sound_fx[id].dsbuffer->GetStatus(&status);
// return the status
return(status);
} else { // total failure
return(-1);
}
}