oal upd
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329
src/audio/oal/aldlist.cpp
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329
src/audio/oal/aldlist.cpp
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/*
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* Copyright (c) 2006, Creative Labs Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification, are permitted provided
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* that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice, this list of conditions and
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* the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright notice, this list of conditions
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* and the following disclaimer in the documentation and/or other materials provided with the distribution.
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* * Neither the name of Creative Labs Inc. nor the names of its contributors may be used to endorse or
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* promote products derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "aldlist.h"
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#ifdef AUDIO_OAL
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/*
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* Init call
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*/
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ALDeviceList::ALDeviceList()
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{
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ALDEVICEINFO ALDeviceInfo;
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char *devices;
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int index;
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const char *defaultDeviceName;
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const char *actualDeviceName;
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// DeviceInfo vector stores, for each enumerated device, it's device name, selection status, spec version #, and extension support
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vDeviceInfo.empty();
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vDeviceInfo.reserve(10);
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defaultDeviceIndex = 0;
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if (alcIsExtensionPresent(NULL, "ALC_ENUMERATION_EXT")) {
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devices = (char *)alcGetString(NULL, ALC_DEVICE_SPECIFIER);
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defaultDeviceName = (char *)alcGetString(NULL, ALC_DEFAULT_DEVICE_SPECIFIER);
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index = 0;
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// go through device list (each device terminated with a single NULL, list terminated with double NULL)
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while (*devices != NULL) {
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if (strcmp(defaultDeviceName, devices) == 0) {
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defaultDeviceIndex = index;
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}
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ALCdevice *device = alcOpenDevice(devices);
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if (device) {
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ALCcontext *context = alcCreateContext(device, NULL);
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if (context) {
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alcMakeContextCurrent(context);
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// if new actual device name isn't already in the list, then add it...
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actualDeviceName = alcGetString(device, ALC_DEVICE_SPECIFIER);
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bool bNewName = true;
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for (int i = 0; i < GetNumDevices(); i++) {
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if (strcmp(GetDeviceName(i), actualDeviceName) == 0) {
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bNewName = false;
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}
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}
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if ((bNewName) && (actualDeviceName != NULL) && (strlen(actualDeviceName) > 0)) {
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memset(&ALDeviceInfo, 0, sizeof(ALDEVICEINFO));
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ALDeviceInfo.bSelected = true;
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ALDeviceInfo.strDeviceName = std::string(actualDeviceName, strlen(actualDeviceName));
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alcGetIntegerv(device, ALC_MAJOR_VERSION, sizeof(int), &ALDeviceInfo.iMajorVersion);
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alcGetIntegerv(device, ALC_MINOR_VERSION, sizeof(int), &ALDeviceInfo.iMinorVersion);
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ALDeviceInfo.pvstrExtensions = new std::vector<std::string>;
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// Check for ALC Extensions
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if (alcIsExtensionPresent(device, "ALC_EXT_CAPTURE") == AL_TRUE)
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ALDeviceInfo.pvstrExtensions->push_back("ALC_EXT_CAPTURE");
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if (alcIsExtensionPresent(device, "ALC_EXT_EFX") == AL_TRUE)
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ALDeviceInfo.pvstrExtensions->push_back("ALC_EXT_EFX");
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// Check for AL Extensions
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if (alIsExtensionPresent("AL_EXT_OFFSET") == AL_TRUE)
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ALDeviceInfo.pvstrExtensions->push_back("AL_EXT_OFFSET");
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if (alIsExtensionPresent("AL_EXT_LINEAR_DISTANCE") == AL_TRUE)
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ALDeviceInfo.pvstrExtensions->push_back("AL_EXT_LINEAR_DISTANCE");
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if (alIsExtensionPresent("AL_EXT_EXPONENT_DISTANCE") == AL_TRUE)
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ALDeviceInfo.pvstrExtensions->push_back("AL_EXT_EXPONENT_DISTANCE");
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if (alIsExtensionPresent("EAX2.0") == AL_TRUE)
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ALDeviceInfo.pvstrExtensions->push_back("EAX2.0");
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if (alIsExtensionPresent("EAX3.0") == AL_TRUE)
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ALDeviceInfo.pvstrExtensions->push_back("EAX3.0");
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if (alIsExtensionPresent("EAX4.0") == AL_TRUE)
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ALDeviceInfo.pvstrExtensions->push_back("EAX4.0");
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if (alIsExtensionPresent("EAX5.0") == AL_TRUE)
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ALDeviceInfo.pvstrExtensions->push_back("EAX5.0");
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if (alIsExtensionPresent("EAX-RAM") == AL_TRUE)
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ALDeviceInfo.pvstrExtensions->push_back("EAX-RAM");
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// Get Source Count
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ALDeviceInfo.uiSourceCount = GetMaxNumSources();
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vDeviceInfo.push_back(ALDeviceInfo);
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}
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alcMakeContextCurrent(NULL);
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alcDestroyContext(context);
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}
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alcCloseDevice(device);
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}
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devices += strlen(devices) + 1;
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index += 1;
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}
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}
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ResetFilters();
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}
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/*
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* Exit call
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*/
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ALDeviceList::~ALDeviceList()
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{
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for (unsigned int i = 0; i < vDeviceInfo.size(); i++) {
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if (vDeviceInfo[i].pvstrExtensions) {
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vDeviceInfo[i].pvstrExtensions->empty();
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delete vDeviceInfo[i].pvstrExtensions;
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}
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}
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vDeviceInfo.empty();
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}
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/*
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* Returns the number of devices in the complete device list
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*/
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int ALDeviceList::GetNumDevices()
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{
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return (int)vDeviceInfo.size();
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}
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/*
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* Returns the device name at an index in the complete device list
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*/
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char * ALDeviceList::GetDeviceName(int index)
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{
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if (index < GetNumDevices())
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return (char *)vDeviceInfo[index].strDeviceName.c_str();
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else
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return NULL;
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}
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/*
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* Returns the major and minor version numbers for a device at a specified index in the complete list
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*/
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void ALDeviceList::GetDeviceVersion(int index, int *major, int *minor)
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{
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if (index < GetNumDevices()) {
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if (major)
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*major = vDeviceInfo[index].iMajorVersion;
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if (minor)
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*minor = vDeviceInfo[index].iMinorVersion;
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}
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return;
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}
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/*
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* Returns the maximum number of Sources that can be generate on the given device
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*/
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unsigned int ALDeviceList::GetMaxNumSources(int index)
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{
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if (index < GetNumDevices())
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return vDeviceInfo[index].uiSourceCount;
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else
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return 0;
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}
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/*
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* Checks if the extension is supported on the given device
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*/
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bool ALDeviceList::IsExtensionSupported(int index, char *szExtName)
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{
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bool bReturn = false;
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if (index < GetNumDevices()) {
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for (unsigned int i = 0; i < vDeviceInfo[index].pvstrExtensions->size(); i++) {
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if (!_stricmp(vDeviceInfo[index].pvstrExtensions->at(i).c_str(), szExtName)) {
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bReturn = true;
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break;
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}
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}
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}
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return bReturn;
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}
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/*
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* returns the index of the default device in the complete device list
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*/
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int ALDeviceList::GetDefaultDevice()
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{
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return defaultDeviceIndex;
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}
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/*
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* Deselects devices which don't have the specified minimum version
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*/
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void ALDeviceList::FilterDevicesMinVer(int major, int minor)
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{
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int dMajor, dMinor;
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for (unsigned int i = 0; i < vDeviceInfo.size(); i++) {
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GetDeviceVersion(i, &dMajor, &dMinor);
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if ((dMajor < major) || ((dMajor == major) && (dMinor < minor))) {
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vDeviceInfo[i].bSelected = false;
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}
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}
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}
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/*
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* Deselects devices which don't have the specified maximum version
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*/
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void ALDeviceList::FilterDevicesMaxVer(int major, int minor)
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{
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int dMajor, dMinor;
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for (unsigned int i = 0; i < vDeviceInfo.size(); i++) {
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GetDeviceVersion(i, &dMajor, &dMinor);
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if ((dMajor > major) || ((dMajor == major) && (dMinor > minor))) {
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vDeviceInfo[i].bSelected = false;
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}
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}
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}
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/*
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* Deselects device which don't support the given extension name
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*/
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void ALDeviceList::FilterDevicesExtension(char *szExtName)
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{
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bool bFound;
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for (unsigned int i = 0; i < vDeviceInfo.size(); i++) {
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bFound = false;
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for (unsigned int j = 0; j < vDeviceInfo[i].pvstrExtensions->size(); j++) {
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if (!_stricmp(vDeviceInfo[i].pvstrExtensions->at(j).c_str(), szExtName)) {
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bFound = true;
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break;
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}
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}
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if (!bFound)
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vDeviceInfo[i].bSelected = false;
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}
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}
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/*
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* Resets all filtering, such that all devices are in the list
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*/
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void ALDeviceList::ResetFilters()
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{
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for (int i = 0; i < GetNumDevices(); i++) {
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vDeviceInfo[i].bSelected = true;
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}
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filterIndex = 0;
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}
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/*
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* Gets index of first filtered device
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*/
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int ALDeviceList::GetFirstFilteredDevice()
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{
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int i;
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for (i = 0; i < GetNumDevices(); i++) {
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if (vDeviceInfo[i].bSelected == true) {
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break;
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}
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}
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filterIndex = i + 1;
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return i;
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}
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/*
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* Gets index of next filtered device
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*/
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int ALDeviceList::GetNextFilteredDevice()
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{
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int i;
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for (i = filterIndex; i < GetNumDevices(); i++) {
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if (vDeviceInfo[i].bSelected == true) {
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break;
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}
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}
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filterIndex = i + 1;
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return i;
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}
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/*
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* Internal function to detemine max number of Sources that can be generated
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*/
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unsigned int ALDeviceList::GetMaxNumSources()
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{
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ALuint uiSources[256];
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unsigned int iSourceCount = 0;
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// Clear AL Error Code
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alGetError();
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// Generate up to 256 Sources, checking for any errors
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for (iSourceCount = 0; iSourceCount < 256; iSourceCount++)
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{
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alGenSources(1, &uiSources[iSourceCount]);
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if (alGetError() != AL_NO_ERROR)
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break;
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}
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// Release the Sources
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alDeleteSources(iSourceCount, uiSources);
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if (alGetError() != AL_NO_ERROR)
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{
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for (unsigned int i = 0; i < 256; i++)
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{
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alDeleteSources(1, &uiSources[i]);
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}
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}
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return iSourceCount;
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}
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#endif
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