/*
* Copyright (c) 2006, Creative Labs Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted provided
* that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice, this list of conditions and
* the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice, this list of conditions
* and the following disclaimer in the documentation and/or other materials provided with the distribution.
* * Neither the name of Creative Labs Inc. nor the names of its contributors may be used to endorse or
* promote products derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "aldlist.h"
#ifdef AUDIO_OAL
/*
* Init call
*/
ALDeviceList::ALDeviceList()
{
char *devices;
int index;
const char *defaultDeviceName;
const char *actualDeviceName;
// DeviceInfo vector stores, for each enumerated device, it's device name, selection status, spec version #, and extension support
nNumOfDevices = 0;
defaultDeviceIndex = 0;
if (alcIsExtensionPresent(NULL, "ALC_ENUMERATION_EXT")) {
devices = (char *)alcGetString(NULL, ALC_ALL_DEVICES_SPECIFIER);
defaultDeviceName = (char *)alcGetString(NULL, ALC_DEFAULT_ALL_DEVICES_SPECIFIER);
index = 0;
// go through device list (each device terminated with a single NULL, list terminated with double NULL)
while (*devices != '\0') {
if (strcmp(defaultDeviceName, devices) == 0) {
defaultDeviceIndex = index;
}
ALCdevice *device = alcOpenDevice(devices);
if (device) {
ALCcontext *context = alcCreateContext(device, NULL);
if (context) {
alcMakeContextCurrent(context);
// if new actual device name isn't already in the list, then add it...
actualDeviceName = alcGetString(device, ALC_ALL_DEVICES_SPECIFIER);
if ((actualDeviceName != NULL) && (strlen(actualDeviceName) > 0)) {
ALDEVICEINFO &ALDeviceInfo = aDeviceInfo[nNumOfDevices++];
ALDeviceInfo.bSelected = true;
ALDeviceInfo.SetName(actualDeviceName);
alcGetIntegerv(device, ALC_MAJOR_VERSION, sizeof(int), &ALDeviceInfo.iMajorVersion);
alcGetIntegerv(device, ALC_MINOR_VERSION, sizeof(int), &ALDeviceInfo.iMinorVersion);
// Check for ALC Extensions
if (alcIsExtensionPresent(device, "ALC_EXT_CAPTURE") == AL_TRUE)
ALDeviceInfo.Extensions |= ADEXT_EXT_CAPTURE;
if (alcIsExtensionPresent(device, "ALC_EXT_EFX") == AL_TRUE)
ALDeviceInfo.Extensions |= ADEXT_EXT_EFX;
// Check for AL Extensions
if (alIsExtensionPresent("AL_EXT_OFFSET") == AL_TRUE)
ALDeviceInfo.Extensions |= ADEXT_EXT_OFFSET;
if (alIsExtensionPresent("AL_EXT_LINEAR_DISTANCE") == AL_TRUE)
ALDeviceInfo.Extensions |= ADEXT_EXT_LINEAR_DISTANCE;
if (alIsExtensionPresent("AL_EXT_EXPONENT_DISTANCE") == AL_TRUE)
ALDeviceInfo.Extensions |= ADEXT_EXT_EXPONENT_DISTANCE;
if (alIsExtensionPresent("EAX2.0") == AL_TRUE)
ALDeviceInfo.Extensions |= ADEXT_EAX2;
if (alIsExtensionPresent("EAX3.0") == AL_TRUE)
ALDeviceInfo.Extensions |= ADEXT_EAX3;
if (alIsExtensionPresent("EAX4.0") == AL_TRUE)
ALDeviceInfo.Extensions |= ADEXT_EAX4;
if (alIsExtensionPresent("EAX5.0") == AL_TRUE)
ALDeviceInfo.Extensions |= ADEXT_EAX5;
if (alIsExtensionPresent("EAX-RAM") == AL_TRUE)
ALDeviceInfo.Extensions |= ADEXT_EAX_RAM;
// Get Source Count
ALDeviceInfo.uiSourceCount = GetMaxNumSources();
}
alcMakeContextCurrent(NULL);
alcDestroyContext(context);
}
alcCloseDevice(device);
}
devices += strlen(devices) + 1;
index += 1;
}
}
ResetFilters();
}
/*
* Exit call
*/
ALDeviceList::~ALDeviceList()
{
}
/*
* Returns the number of devices in the complete device list
*/
unsigned int ALDeviceList::GetNumDevices()
{
return nNumOfDevices;
}
/*
* Returns the device name at an index in the complete device list
*/
const char * ALDeviceList::GetDeviceName(unsigned int index)
{
if (index < GetNumDevices())
return aDeviceInfo[index].strDeviceName;
else
return NULL;
}
/*
* Returns the major and minor version numbers for a device at a specified index in the complete list
*/
void ALDeviceList::GetDeviceVersion(unsigned int index, int *major, int *minor)
{
if (index < GetNumDevices()) {
if (major)
*major = aDeviceInfo[index].iMajorVersion;
if (minor)
*minor = aDeviceInfo[index].iMinorVersion;
}
return;
}
/*
* Returns the maximum number of Sources that can be generate on the given device
*/
unsigned int ALDeviceList::GetMaxNumSources(unsigned int index)
{
if (index < GetNumDevices())
return aDeviceInfo[index].uiSourceCount;
else
return 0;
}
/*
* Checks if the extension is supported on the given device
*/
bool ALDeviceList::IsExtensionSupported(int index, unsigned short ext)
{
return !!(aDeviceInfo[index].Extensions & ext);
}
/*
* returns the index of the default device in the complete device list
*/
int ALDeviceList::GetDefaultDevice()
{
return defaultDeviceIndex;
}
/*
* Deselects devices which don't have the specified minimum version
*/
void ALDeviceList::FilterDevicesMinVer(int major, int minor)
{
int dMajor, dMinor;
for (unsigned int i = 0; i < nNumOfDevices; i++) {
GetDeviceVersion(i, &dMajor, &dMinor);
if ((dMajor < major) || ((dMajor == major) && (dMinor < minor))) {
aDeviceInfo[i].bSelected = false;
}
}
}
/*
* Deselects devices which don't have the specified maximum version
*/
void ALDeviceList::FilterDevicesMaxVer(int major, int minor)
{
int dMajor, dMinor;
for (unsigned int i = 0; i < nNumOfDevices; i++) {
GetDeviceVersion(i, &dMajor, &dMinor);
if ((dMajor > major) || ((dMajor == major) && (dMinor > minor))) {
aDeviceInfo[i].bSelected = false;
}
}
}
/*
* Deselects device which don't support the given extension name
*/
void
ALDeviceList::FilterDevicesExtension(unsigned short ext)
{
for (unsigned int i = 0; i < nNumOfDevices; i++) {
if (!IsExtensionSupported(i, ext))
aDeviceInfo[i].bSelected = false;
}
}
/*
* Resets all filtering, such that all devices are in the list
*/
void ALDeviceList::ResetFilters()
{
for (unsigned int i = 0; i < GetNumDevices(); i++) {
aDeviceInfo[i].bSelected = true;
}
filterIndex = 0;
}
/*
* Gets index of first filtered device
*/
int ALDeviceList::GetFirstFilteredDevice()
{
unsigned int i;
for (i = 0; i < GetNumDevices(); i++) {
if (aDeviceInfo[i].bSelected == true) {
break;
}
}
filterIndex = i + 1;
return i;
}
/*
* Gets index of next filtered device
*/
int ALDeviceList::GetNextFilteredDevice()
{
unsigned int i;
for (i = filterIndex; i < GetNumDevices(); i++) {
if (aDeviceInfo[i].bSelected == true) {
break;
}
}
filterIndex = i + 1;
return i;
}
/*
* Internal function to detemine max number of Sources that can be generated
*/
unsigned int ALDeviceList::GetMaxNumSources()
{
ALuint uiSources[256];
unsigned int iSourceCount = 0;
// Clear AL Error Code
alGetError();
// Generate up to 256 Sources, checking for any errors
for (iSourceCount = 0; iSourceCount < 256; iSourceCount++)
{
alGenSources(1, &uiSources[iSourceCount]);
if (alGetError() != AL_NO_ERROR)
break;
}
// Release the Sources
alDeleteSources(iSourceCount, uiSources);
if (alGetError() != AL_NO_ERROR)
{
for (unsigned int i = 0; i < 256; i++)
{
alDeleteSources(1, &uiSources[i]);
}
}
return iSourceCount;
}
#endif
