1268 lines
34 KiB
C
1268 lines
34 KiB
C
/**
|
|
* OpenAL cross platform audio library
|
|
* Copyright (C) 1999-2007 by authors.
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Library General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Library General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Library General Public
|
|
* License along with this library; if not, write to the
|
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
* Boston, MA 02111-1307, USA.
|
|
* Or go to http://www.gnu.org/copyleft/lgpl.html
|
|
*/
|
|
|
|
#define _CRT_SECURE_NO_DEPRECATE // get rid of sprintf security warnings on VS2005
|
|
|
|
#include "config.h"
|
|
|
|
#include <math.h>
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <memory.h>
|
|
#include "alMain.h"
|
|
#include "alSource.h"
|
|
#include "AL/al.h"
|
|
#include "AL/alc.h"
|
|
#include "alThunk.h"
|
|
#include "alSource.h"
|
|
#include "alExtension.h"
|
|
#include "bs2b.h"
|
|
|
|
///////////////////////////////////////////////////////
|
|
// DEBUG INFORMATION
|
|
|
|
char _alDebug[256];
|
|
|
|
///////////////////////////////////////////////////////
|
|
|
|
|
|
#define EmptyFuncs { NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL }
|
|
struct {
|
|
const char *name;
|
|
void (*Init)(BackendFuncs*);
|
|
BackendFuncs Funcs;
|
|
} BackendList[] = {
|
|
#ifdef HAVE_ALSA
|
|
{ "alsa", alc_alsa_init, EmptyFuncs },
|
|
#endif
|
|
#ifdef HAVE_OSS
|
|
{ "oss", alc_oss_init, EmptyFuncs },
|
|
#endif
|
|
#ifdef HAVE_DSOUND
|
|
{ "dsound", alcDSoundInit, EmptyFuncs },
|
|
#endif
|
|
#ifdef HAVE_WINMM
|
|
{ "winmm", alcWinMMInit, EmptyFuncs },
|
|
#endif
|
|
|
|
{ "wave", alc_wave_init, EmptyFuncs },
|
|
|
|
{ NULL, NULL, EmptyFuncs }
|
|
};
|
|
#undef EmptyFuncs
|
|
|
|
///////////////////////////////////////////////////////
|
|
|
|
#define ALC_EFX_MAJOR_VERSION 0x20001
|
|
#define ALC_EFX_MINOR_VERSION 0x20002
|
|
#define ALC_MAX_AUXILIARY_SENDS 0x20003
|
|
|
|
///////////////////////////////////////////////////////
|
|
// STRING and EXTENSIONS
|
|
|
|
typedef struct ALCextension_struct
|
|
{
|
|
ALCchar *extName;
|
|
ALvoid *address;
|
|
} ALCextension;
|
|
|
|
typedef struct ALCfunction_struct
|
|
{
|
|
ALCchar *funcName;
|
|
ALvoid *address;
|
|
} ALCfunction;
|
|
|
|
static ALCextension alcExtensions[] = {
|
|
{ "ALC_ENUMERATE_ALL_EXT", (ALvoid *) NULL },
|
|
{ "ALC_ENUMERATION_EXT", (ALvoid *) NULL },
|
|
{ "ALC_EXT_CAPTURE", (ALvoid *) NULL },
|
|
{ "ALC_EXT_EFX", (ALvoid *) NULL },
|
|
{ NULL, (ALvoid *) NULL }
|
|
};
|
|
|
|
static ALCfunction alcFunctions[] = {
|
|
{ "alcCreateContext", (ALvoid *) alcCreateContext },
|
|
{ "alcMakeContextCurrent", (ALvoid *) alcMakeContextCurrent },
|
|
{ "alcProcessContext", (ALvoid *) alcProcessContext },
|
|
{ "alcSuspendContext", (ALvoid *) alcSuspendContext },
|
|
{ "alcDestroyContext", (ALvoid *) alcDestroyContext },
|
|
{ "alcGetCurrentContext", (ALvoid *) alcGetCurrentContext },
|
|
{ "alcGetContextsDevice", (ALvoid *) alcGetContextsDevice },
|
|
{ "alcOpenDevice", (ALvoid *) alcOpenDevice },
|
|
{ "alcCloseDevice", (ALvoid *) alcCloseDevice },
|
|
{ "alcGetError", (ALvoid *) alcGetError },
|
|
{ "alcIsExtensionPresent", (ALvoid *) alcIsExtensionPresent },
|
|
{ "alcGetProcAddress", (ALvoid *) alcGetProcAddress },
|
|
{ "alcGetEnumValue", (ALvoid *) alcGetEnumValue },
|
|
{ "alcGetString", (ALvoid *) alcGetString },
|
|
{ "alcGetIntegerv", (ALvoid *) alcGetIntegerv },
|
|
{ "alcCaptureOpenDevice", (ALvoid *) alcCaptureOpenDevice },
|
|
{ "alcCaptureCloseDevice", (ALvoid *) alcCaptureCloseDevice },
|
|
{ "alcCaptureStart", (ALvoid *) alcCaptureStart },
|
|
{ "alcCaptureStop", (ALvoid *) alcCaptureStop },
|
|
{ "alcCaptureSamples", (ALvoid *) alcCaptureSamples },
|
|
{ NULL, (ALvoid *) NULL }
|
|
};
|
|
|
|
static ALenums enumeration[]={
|
|
// Types
|
|
{ (ALchar *)"ALC_INVALID", ALC_INVALID },
|
|
{ (ALchar *)"ALC_FALSE", ALC_FALSE },
|
|
{ (ALchar *)"ALC_TRUE", ALC_TRUE },
|
|
|
|
// ALC Properties
|
|
{ (ALchar *)"ALC_MAJOR_VERSION", ALC_MAJOR_VERSION },
|
|
{ (ALchar *)"ALC_MINOR_VERSION", ALC_MINOR_VERSION },
|
|
{ (ALchar *)"ALC_ATTRIBUTES_SIZE", ALC_ATTRIBUTES_SIZE },
|
|
{ (ALchar *)"ALC_ALL_ATTRIBUTES", ALC_ALL_ATTRIBUTES },
|
|
{ (ALchar *)"ALC_DEFAULT_DEVICE_SPECIFIER", ALC_DEFAULT_DEVICE_SPECIFIER },
|
|
{ (ALchar *)"ALC_DEVICE_SPECIFIER", ALC_DEVICE_SPECIFIER },
|
|
{ (ALchar *)"ALC_ALL_DEVICES_SPECIFIER", ALC_ALL_DEVICES_SPECIFIER },
|
|
{ (ALchar *)"ALC_DEFAULT_ALL_DEVICES_SPECIFIER", ALC_DEFAULT_ALL_DEVICES_SPECIFIER },
|
|
{ (ALchar *)"ALC_EXTENSIONS", ALC_EXTENSIONS },
|
|
{ (ALchar *)"ALC_FREQUENCY", ALC_FREQUENCY },
|
|
{ (ALchar *)"ALC_REFRESH", ALC_REFRESH },
|
|
{ (ALchar *)"ALC_SYNC", ALC_SYNC },
|
|
{ (ALchar *)"ALC_MONO_SOURCES", ALC_MONO_SOURCES },
|
|
{ (ALchar *)"ALC_STEREO_SOURCES", ALC_STEREO_SOURCES },
|
|
{ (ALchar *)"ALC_CAPTURE_DEVICE_SPECIFIER", ALC_CAPTURE_DEVICE_SPECIFIER },
|
|
{ (ALchar *)"ALC_CAPTURE_DEFAULT_DEVICE_SPECIFIER", ALC_CAPTURE_DEFAULT_DEVICE_SPECIFIER},
|
|
{ (ALchar *)"ALC_CAPTURE_SAMPLES", ALC_CAPTURE_SAMPLES },
|
|
|
|
// EFX Properties
|
|
{ (ALchar *)"ALC_EFX_MAJOR_VERSION", ALC_EFX_MAJOR_VERSION },
|
|
{ (ALchar *)"ALC_EFX_MINOR_VERSION", ALC_EFX_MINOR_VERSION },
|
|
{ (ALchar *)"ALC_MAX_AUXILIARY_SENDS", ALC_MAX_AUXILIARY_SENDS },
|
|
|
|
// ALC Error Message
|
|
{ (ALchar *)"ALC_NO_ERROR", ALC_NO_ERROR },
|
|
{ (ALchar *)"ALC_INVALID_DEVICE", ALC_INVALID_DEVICE },
|
|
{ (ALchar *)"ALC_INVALID_CONTEXT", ALC_INVALID_CONTEXT },
|
|
{ (ALchar *)"ALC_INVALID_ENUM", ALC_INVALID_ENUM },
|
|
{ (ALchar *)"ALC_INVALID_VALUE", ALC_INVALID_VALUE },
|
|
{ (ALchar *)"ALC_OUT_OF_MEMORY", ALC_OUT_OF_MEMORY },
|
|
{ (ALchar *)NULL, (ALenum)0 }
|
|
};
|
|
// Error strings
|
|
static const ALCchar alcNoError[] = "No Error";
|
|
static const ALCchar alcErrInvalidDevice[] = "Invalid Device";
|
|
static const ALCchar alcErrInvalidContext[] = "Invalid Context";
|
|
static const ALCchar alcErrInvalidEnum[] = "Invalid Enum";
|
|
static const ALCchar alcErrInvalidValue[] = "Invalid Value";
|
|
static const ALCchar alcErrOutOfMemory[] = "Out of Memory";
|
|
|
|
// Context strings
|
|
static ALCchar alcDeviceList[2048];
|
|
static ALCchar alcAllDeviceList[2048];
|
|
static ALCchar alcCaptureDeviceList[2048];
|
|
// Default is always the first in the list
|
|
static ALCchar *alcDefaultDeviceSpecifier = alcDeviceList;
|
|
static ALCchar *alcDefaultAllDeviceSpecifier = alcAllDeviceList;
|
|
static ALCchar *alcCaptureDefaultDeviceSpecifier = alcCaptureDeviceList;
|
|
|
|
|
|
static ALCchar alcExtensionList[] = "ALC_ENUMERATE_ALL_EXT ALC_ENUMERATION_EXT ALC_EXT_CAPTURE ALC_EXT_EFX";
|
|
static ALCint alcMajorVersion = 1;
|
|
static ALCint alcMinorVersion = 1;
|
|
|
|
static ALCint alcEFXMajorVersion = 1;
|
|
static ALCint alcEFXMinorVersion = 0;
|
|
|
|
///////////////////////////////////////////////////////
|
|
|
|
|
|
///////////////////////////////////////////////////////
|
|
// Global Variables
|
|
|
|
static ALCdevice *g_pDeviceList = NULL;
|
|
static ALCuint g_ulDeviceCount = 0;
|
|
|
|
// Context List
|
|
static ALCcontext *g_pContextList = NULL;
|
|
static ALCuint g_ulContextCount = 0;
|
|
|
|
// Context Error
|
|
static ALCenum g_eLastContextError = ALC_NO_ERROR;
|
|
|
|
///////////////////////////////////////////////////////
|
|
|
|
|
|
///////////////////////////////////////////////////////
|
|
// ALC Related helper functions
|
|
|
|
static void InitAL(void)
|
|
{
|
|
static int done = 0;
|
|
if(!done)
|
|
{
|
|
int i;
|
|
const char *devs;
|
|
|
|
InitializeCriticalSection(&_alMutex);
|
|
ALTHUNK_INIT();
|
|
ReadALConfig();
|
|
|
|
devs = GetConfigValue(NULL, "drivers", "");
|
|
if(devs[0])
|
|
{
|
|
int n;
|
|
size_t len;
|
|
const char *next = devs;
|
|
|
|
i = 0;
|
|
|
|
do {
|
|
devs = next;
|
|
next = strchr(devs, ',');
|
|
|
|
if(!devs[0] || devs[0] == ',')
|
|
continue;
|
|
|
|
len = (next ? ((size_t)(next-devs)) : strlen(devs));
|
|
for(n = i;BackendList[n].Init;n++)
|
|
{
|
|
if(len == strlen(BackendList[n].name) &&
|
|
strncmp(BackendList[n].name, devs, len) == 0)
|
|
{
|
|
const char *name = BackendList[i].name;
|
|
void (*Init)(BackendFuncs*) = BackendList[i].Init;
|
|
|
|
BackendList[i].name = BackendList[n].name;
|
|
BackendList[i].Init = BackendList[n].Init;
|
|
|
|
BackendList[n].name = name;
|
|
BackendList[n].Init = Init;
|
|
|
|
i++;
|
|
}
|
|
}
|
|
} while(next++);
|
|
|
|
BackendList[i].name = NULL;
|
|
BackendList[i].Init = NULL;
|
|
}
|
|
|
|
for(i = 0;BackendList[i].Init;i++)
|
|
BackendList[i].Init(&BackendList[i].Funcs);
|
|
done = 1;
|
|
}
|
|
}
|
|
|
|
ALCchar *AppendDeviceList(char *name)
|
|
{
|
|
static int pos;
|
|
ALCchar *ret = alcDeviceList+pos;
|
|
pos += snprintf(alcDeviceList+pos, sizeof(alcDeviceList)-pos, "%s", name) + 1;
|
|
return ret;
|
|
}
|
|
|
|
ALCchar *AppendAllDeviceList(char *name)
|
|
{
|
|
static int pos;
|
|
ALCchar *ret = alcAllDeviceList+pos;
|
|
pos += snprintf(alcAllDeviceList+pos, sizeof(alcAllDeviceList)-pos, "%s", name) + 1;
|
|
return ret;
|
|
}
|
|
|
|
ALCchar *AppendCaptureDeviceList(char *name)
|
|
{
|
|
static int pos;
|
|
ALCchar *ret = alcCaptureDeviceList+pos;
|
|
pos += snprintf(alcCaptureDeviceList+pos, sizeof(alcCaptureDeviceList)-pos, "%s", name) + 1;
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
IsContext
|
|
|
|
Check pContext is a valid Context pointer
|
|
*/
|
|
static ALCboolean IsContext(ALCcontext *pContext)
|
|
{
|
|
ALCcontext *pTempContext;
|
|
|
|
pTempContext = g_pContextList;
|
|
while (pTempContext && pTempContext != pContext)
|
|
pTempContext = pTempContext->next;
|
|
|
|
return (pTempContext ? ALC_TRUE : ALC_FALSE);
|
|
}
|
|
|
|
|
|
/*
|
|
SetALCError
|
|
|
|
Store latest ALC Error
|
|
*/
|
|
ALCvoid SetALCError(ALenum errorCode)
|
|
{
|
|
g_eLastContextError = errorCode;
|
|
}
|
|
|
|
|
|
/*
|
|
SuspendContext
|
|
|
|
Thread-safe entry
|
|
*/
|
|
ALCvoid SuspendContext(ALCcontext *pContext)
|
|
{
|
|
(void)pContext;
|
|
EnterCriticalSection(&_alMutex);
|
|
}
|
|
|
|
|
|
/*
|
|
ProcessContext
|
|
|
|
Thread-safe exit
|
|
*/
|
|
ALCvoid ProcessContext(ALCcontext *pContext)
|
|
{
|
|
(void)pContext;
|
|
LeaveCriticalSection(&_alMutex);
|
|
}
|
|
|
|
|
|
/*
|
|
InitContext
|
|
|
|
Initialize Context variables
|
|
*/
|
|
static ALvoid InitContext(ALCcontext *pContext)
|
|
{
|
|
int level;
|
|
|
|
//Initialise listener
|
|
pContext->Listener.Gain = 1.0f;
|
|
pContext->Listener.MetersPerUnit = 1.0f;
|
|
pContext->Listener.Position[0] = 0.0f;
|
|
pContext->Listener.Position[1] = 0.0f;
|
|
pContext->Listener.Position[2] = 0.0f;
|
|
pContext->Listener.Velocity[0] = 0.0f;
|
|
pContext->Listener.Velocity[1] = 0.0f;
|
|
pContext->Listener.Velocity[2] = 0.0f;
|
|
pContext->Listener.Forward[0] = 0.0f;
|
|
pContext->Listener.Forward[1] = 0.0f;
|
|
pContext->Listener.Forward[2] = -1.0f;
|
|
pContext->Listener.Up[0] = 0.0f;
|
|
pContext->Listener.Up[1] = 1.0f;
|
|
pContext->Listener.Up[2] = 0.0f;
|
|
|
|
//Validate pContext
|
|
pContext->LastError = AL_NO_ERROR;
|
|
pContext->InUse = AL_FALSE;
|
|
|
|
//Set output format
|
|
pContext->Frequency = pContext->Device->Frequency;
|
|
|
|
//Set globals
|
|
pContext->DistanceModel = AL_INVERSE_DISTANCE_CLAMPED;
|
|
pContext->DopplerFactor = 1.0f;
|
|
pContext->DopplerVelocity = 1.0f;
|
|
pContext->flSpeedOfSound = SPEEDOFSOUNDMETRESPERSEC;
|
|
|
|
pContext->lNumStereoSources = 1;
|
|
pContext->lNumMonoSources = pContext->Device->MaxNoOfSources - pContext->lNumStereoSources;
|
|
|
|
strcpy(pContext->ExtensionList, "AL_EXT_EXPONENT_DISTANCE AL_EXT_FLOAT32 AL_EXT_IMA4 AL_EXT_LINEAR_DISTANCE AL_EXT_MCFORMATS AL_EXT_OFFSET AL_LOKI_quadriphonic");
|
|
|
|
level = GetConfigValueInt(NULL, "cf_level", 0);
|
|
if(level > 0 && level <= 6)
|
|
{
|
|
pContext->bs2b = calloc(1, sizeof(*pContext->bs2b));
|
|
bs2b_set_srate(pContext->bs2b, pContext->Frequency);
|
|
bs2b_set_level(pContext->bs2b, level);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
ExitContext
|
|
|
|
Clean up Context, destroy any remaining Sources
|
|
*/
|
|
static ALCvoid ExitContext(ALCcontext *pContext)
|
|
{
|
|
unsigned int i;
|
|
ALsource *ALSource;
|
|
ALsource *ALTempSource;
|
|
|
|
#ifdef _DEBUG
|
|
if (pContext->SourceCount>0)
|
|
AL_PRINT("alcDestroyContext() %d Source(s) NOT deleted\n", pContext->SourceCount);
|
|
#endif
|
|
|
|
// Free all the Sources still remaining
|
|
ALSource = pContext->Source;
|
|
for (i = 0; i < pContext->SourceCount; i++)
|
|
{
|
|
ALTempSource = ALSource->next;
|
|
ALTHUNK_REMOVEENTRY(ALSource->source);
|
|
memset(ALSource, 0, sizeof(ALsource));
|
|
free(ALSource);
|
|
ALSource = ALTempSource;
|
|
}
|
|
|
|
//Invalidate context
|
|
pContext->LastError = AL_NO_ERROR;
|
|
pContext->InUse = AL_FALSE;
|
|
|
|
free(pContext->bs2b);
|
|
pContext->bs2b = NULL;
|
|
}
|
|
|
|
///////////////////////////////////////////////////////
|
|
|
|
|
|
///////////////////////////////////////////////////////
|
|
// ALC Functions calls
|
|
|
|
|
|
// This should probably move to another c file but for now ...
|
|
ALCAPI ALCdevice* ALCAPIENTRY alcCaptureOpenDevice(const ALCchar *deviceName, ALCuint frequency, ALCenum format, ALCsizei SampleSize)
|
|
{
|
|
ALCboolean DeviceFound = ALC_FALSE;
|
|
ALCdevice *pDevice = NULL;
|
|
ALCint i;
|
|
|
|
InitAL();
|
|
|
|
if(deviceName && !deviceName[0])
|
|
deviceName = NULL;
|
|
|
|
pDevice = malloc(sizeof(ALCdevice));
|
|
if (pDevice)
|
|
{
|
|
if (SampleSize > 0)
|
|
{
|
|
//Initialise device structure
|
|
memset(pDevice, 0, sizeof(ALCdevice));
|
|
|
|
//Validate device
|
|
pDevice->InUse = AL_TRUE;
|
|
pDevice->IsCaptureDevice = AL_TRUE;
|
|
|
|
pDevice->Frequency = frequency;
|
|
pDevice->Format = format;
|
|
pDevice->Channels = aluChannelsFromFormat(format);
|
|
pDevice->FrameSize = aluBytesFromFormat(format) *
|
|
pDevice->Channels;
|
|
|
|
for(i = 0;BackendList[i].Init;i++)
|
|
{
|
|
pDevice->Funcs = &BackendList[i].Funcs;
|
|
if(ALCdevice_OpenCapture(pDevice, deviceName, frequency, format, SampleSize))
|
|
{
|
|
SuspendContext(NULL);
|
|
pDevice->next = g_pDeviceList;
|
|
g_pDeviceList = pDevice;
|
|
g_ulDeviceCount++;
|
|
ProcessContext(NULL);
|
|
|
|
DeviceFound = ALC_TRUE;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
SetALCError(ALC_INVALID_VALUE);
|
|
|
|
if(!DeviceFound)
|
|
{
|
|
free(pDevice);
|
|
pDevice = NULL;
|
|
}
|
|
}
|
|
else
|
|
SetALCError(ALC_OUT_OF_MEMORY);
|
|
|
|
return pDevice;
|
|
}
|
|
|
|
ALCAPI ALCboolean ALCAPIENTRY alcCaptureCloseDevice(ALCdevice *pDevice)
|
|
{
|
|
ALCboolean bReturn = ALC_FALSE;
|
|
ALCdevice **list;
|
|
|
|
if ((pDevice)&&(pDevice->IsCaptureDevice))
|
|
{
|
|
SuspendContext(NULL);
|
|
|
|
list = &g_pDeviceList;
|
|
while(*list != pDevice)
|
|
list = &(*list)->next;
|
|
|
|
*list = (*list)->next;
|
|
g_ulDeviceCount--;
|
|
|
|
ProcessContext(NULL);
|
|
|
|
ALCdevice_CloseCapture(pDevice);
|
|
free(pDevice);
|
|
|
|
bReturn = ALC_TRUE;
|
|
}
|
|
else
|
|
SetALCError(ALC_INVALID_DEVICE);
|
|
|
|
return bReturn;
|
|
}
|
|
|
|
ALCAPI void ALCAPIENTRY alcCaptureStart(ALCdevice *pDevice)
|
|
{
|
|
if ((pDevice)&&(pDevice->IsCaptureDevice))
|
|
ALCdevice_StartCapture(pDevice);
|
|
else
|
|
SetALCError(ALC_INVALID_DEVICE);
|
|
}
|
|
|
|
ALCAPI void ALCAPIENTRY alcCaptureStop(ALCdevice *pDevice)
|
|
{
|
|
if ((pDevice)&&(pDevice->IsCaptureDevice))
|
|
ALCdevice_StopCapture(pDevice);
|
|
else
|
|
SetALCError(ALC_INVALID_DEVICE);
|
|
}
|
|
|
|
ALCAPI void ALCAPIENTRY alcCaptureSamples(ALCdevice *pDevice, ALCvoid *pBuffer, ALCsizei lSamples)
|
|
{
|
|
if ((pDevice) && (pDevice->IsCaptureDevice))
|
|
ALCdevice_CaptureSamples(pDevice, pBuffer, lSamples);
|
|
else
|
|
SetALCError(ALC_INVALID_DEVICE);
|
|
}
|
|
|
|
/*
|
|
alcGetError
|
|
|
|
Return last ALC generated error code
|
|
*/
|
|
ALCAPI ALCenum ALCAPIENTRY alcGetError(ALCdevice *device)
|
|
{
|
|
ALCenum errorCode;
|
|
|
|
(void)device;
|
|
|
|
errorCode = g_eLastContextError;
|
|
g_eLastContextError = ALC_NO_ERROR;
|
|
return errorCode;
|
|
}
|
|
|
|
|
|
/*
|
|
alcSuspendContext
|
|
|
|
Not functional
|
|
*/
|
|
ALCAPI ALCvoid ALCAPIENTRY alcSuspendContext(ALCcontext *pContext)
|
|
{
|
|
// Not a lot happens here !
|
|
(void)pContext;
|
|
}
|
|
|
|
|
|
/*
|
|
alcProcessContext
|
|
|
|
Not functional
|
|
*/
|
|
ALCAPI ALCvoid ALCAPIENTRY alcProcessContext(ALCcontext *pContext)
|
|
{
|
|
// Not a lot happens here !
|
|
(void)pContext;
|
|
}
|
|
|
|
|
|
/*
|
|
alcGetString
|
|
|
|
Returns information about the Device, and error strings
|
|
*/
|
|
ALCAPI const ALCchar* ALCAPIENTRY alcGetString(ALCdevice *pDevice,ALCenum param)
|
|
{
|
|
const ALCchar *value = NULL;
|
|
|
|
InitAL();
|
|
|
|
switch (param)
|
|
{
|
|
case ALC_NO_ERROR:
|
|
value = alcNoError;
|
|
break;
|
|
|
|
case ALC_INVALID_ENUM:
|
|
value = alcErrInvalidEnum;
|
|
break;
|
|
|
|
case ALC_INVALID_VALUE:
|
|
value = alcErrInvalidValue;
|
|
break;
|
|
|
|
case ALC_INVALID_DEVICE:
|
|
value = alcErrInvalidDevice;
|
|
break;
|
|
|
|
case ALC_INVALID_CONTEXT:
|
|
value = alcErrInvalidContext;
|
|
break;
|
|
|
|
case ALC_OUT_OF_MEMORY:
|
|
value = alcErrOutOfMemory;
|
|
break;
|
|
|
|
case ALC_DEFAULT_DEVICE_SPECIFIER:
|
|
value = alcDefaultDeviceSpecifier;
|
|
break;
|
|
|
|
case ALC_DEVICE_SPECIFIER:
|
|
if (pDevice)
|
|
value = pDevice->szDeviceName;
|
|
else
|
|
value = alcDeviceList;
|
|
break;
|
|
|
|
case ALC_ALL_DEVICES_SPECIFIER:
|
|
value = alcAllDeviceList;
|
|
break;
|
|
|
|
case ALC_DEFAULT_ALL_DEVICES_SPECIFIER:
|
|
value = alcDefaultAllDeviceSpecifier;
|
|
break;
|
|
|
|
case ALC_CAPTURE_DEVICE_SPECIFIER:
|
|
if (pDevice)
|
|
value = pDevice->szDeviceName;
|
|
else
|
|
value = alcCaptureDeviceList;
|
|
break;
|
|
|
|
case ALC_CAPTURE_DEFAULT_DEVICE_SPECIFIER:
|
|
value = alcCaptureDefaultDeviceSpecifier;
|
|
break;
|
|
|
|
case ALC_EXTENSIONS:
|
|
value = alcExtensionList;
|
|
break;
|
|
|
|
default:
|
|
SetALCError(ALC_INVALID_ENUM);
|
|
break;
|
|
}
|
|
|
|
return value;
|
|
}
|
|
|
|
|
|
/*
|
|
alcGetIntegerv
|
|
|
|
Returns information about the Device and the version of Open AL
|
|
*/
|
|
ALCAPI ALCvoid ALCAPIENTRY alcGetIntegerv(ALCdevice *device,ALCenum param,ALsizei size,ALCint *data)
|
|
{
|
|
InitAL();
|
|
|
|
if ((device)&&(device->IsCaptureDevice))
|
|
{
|
|
SuspendContext(NULL);
|
|
|
|
// Capture device
|
|
switch (param)
|
|
{
|
|
case ALC_CAPTURE_SAMPLES:
|
|
if ((size) && (data))
|
|
*data = ALCdevice_AvailableSamples(device);
|
|
else
|
|
SetALCError(ALC_INVALID_VALUE);
|
|
break;
|
|
|
|
default:
|
|
SetALCError(ALC_INVALID_ENUM);
|
|
break;
|
|
}
|
|
|
|
ProcessContext(NULL);
|
|
}
|
|
else
|
|
{
|
|
if(data)
|
|
{
|
|
// Playback Device
|
|
switch (param)
|
|
{
|
|
case ALC_MAJOR_VERSION:
|
|
if(!size)
|
|
SetALCError(ALC_INVALID_VALUE);
|
|
else
|
|
*data = alcMajorVersion;
|
|
break;
|
|
|
|
case ALC_MINOR_VERSION:
|
|
if(!size)
|
|
SetALCError(ALC_INVALID_VALUE);
|
|
else
|
|
*data = alcMinorVersion;
|
|
break;
|
|
|
|
case ALC_EFX_MAJOR_VERSION:
|
|
if(!size)
|
|
SetALCError(ALC_INVALID_VALUE);
|
|
else
|
|
*data = alcEFXMajorVersion;
|
|
break;
|
|
|
|
case ALC_EFX_MINOR_VERSION:
|
|
if(!size)
|
|
SetALCError(ALC_INVALID_VALUE);
|
|
else
|
|
*data = alcEFXMinorVersion;
|
|
break;
|
|
|
|
case ALC_MAX_AUXILIARY_SENDS:
|
|
if(!size)
|
|
SetALCError(ALC_INVALID_VALUE);
|
|
else
|
|
*data = MAX_SENDS;
|
|
break;
|
|
|
|
case ALC_ATTRIBUTES_SIZE:
|
|
if(!device)
|
|
SetALCError(ALC_INVALID_DEVICE);
|
|
else if(!size)
|
|
SetALCError(ALC_INVALID_VALUE);
|
|
else
|
|
*data = 12;
|
|
break;
|
|
|
|
case ALC_ALL_ATTRIBUTES:
|
|
if(!device)
|
|
SetALCError(ALC_INVALID_DEVICE);
|
|
else if (size < 7)
|
|
SetALCError(ALC_INVALID_VALUE);
|
|
else
|
|
{
|
|
int i = 0;
|
|
|
|
data[i++] = ALC_FREQUENCY;
|
|
data[i++] = device->Frequency;
|
|
|
|
data[i++] = ALC_REFRESH;
|
|
data[i++] = device->Frequency / device->UpdateFreq;
|
|
|
|
data[i++] = ALC_SYNC;
|
|
data[i++] = ALC_FALSE;
|
|
|
|
SuspendContext(NULL);
|
|
if(device->Context && size >= 12)
|
|
{
|
|
data[i++] = ALC_MONO_SOURCES;
|
|
data[i++] = device->Context->lNumMonoSources;
|
|
|
|
data[i++] = ALC_STEREO_SOURCES;
|
|
data[i++] = device->Context->lNumStereoSources;
|
|
|
|
data[i++] = ALC_MAX_AUXILIARY_SENDS;
|
|
data[i++] = MAX_SENDS;
|
|
}
|
|
ProcessContext(NULL);
|
|
|
|
data[i++] = 0;
|
|
}
|
|
break;
|
|
|
|
case ALC_FREQUENCY:
|
|
if(!device)
|
|
SetALCError(ALC_INVALID_DEVICE);
|
|
else if(!size)
|
|
SetALCError(ALC_INVALID_VALUE);
|
|
else
|
|
*data = device->Frequency;
|
|
break;
|
|
|
|
case ALC_REFRESH:
|
|
if(!device)
|
|
SetALCError(ALC_INVALID_DEVICE);
|
|
else if(!size)
|
|
SetALCError(ALC_INVALID_VALUE);
|
|
else
|
|
*data = device->Frequency / device->UpdateFreq;
|
|
break;
|
|
|
|
case ALC_SYNC:
|
|
if(!device)
|
|
SetALCError(ALC_INVALID_DEVICE);
|
|
else if(!size)
|
|
SetALCError(ALC_INVALID_VALUE);
|
|
else
|
|
*data = ALC_FALSE;
|
|
break;
|
|
|
|
case ALC_MONO_SOURCES:
|
|
if(!device || !device->Context)
|
|
SetALCError(ALC_INVALID_DEVICE);
|
|
else if (size != 1)
|
|
SetALCError(ALC_INVALID_VALUE);
|
|
else
|
|
*data = device->Context->lNumMonoSources;
|
|
break;
|
|
|
|
case ALC_STEREO_SOURCES:
|
|
if(!device || !device->Context)
|
|
SetALCError(ALC_INVALID_DEVICE);
|
|
else if (size != 1)
|
|
SetALCError(ALC_INVALID_VALUE);
|
|
else
|
|
*data = device->Context->lNumStereoSources;
|
|
break;
|
|
|
|
default:
|
|
SetALCError(ALC_INVALID_ENUM);
|
|
break;
|
|
}
|
|
}
|
|
else if(size)
|
|
SetALCError(ALC_INVALID_VALUE);
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
|
|
/*
|
|
alcIsExtensionPresent
|
|
|
|
Determines if there is support for a particular extension
|
|
*/
|
|
ALCAPI ALCboolean ALCAPIENTRY alcIsExtensionPresent(ALCdevice *device, const ALCchar *extName)
|
|
{
|
|
ALCboolean bResult = ALC_FALSE;
|
|
ALsizei i = 0;
|
|
|
|
(void)device;
|
|
|
|
if (extName)
|
|
{
|
|
while(alcExtensions[i].extName &&
|
|
strcasecmp(alcExtensions[i].extName,extName) != 0)
|
|
i++;
|
|
|
|
if (alcExtensions[i].extName)
|
|
bResult = ALC_TRUE;
|
|
}
|
|
else
|
|
SetALCError(ALC_INVALID_VALUE);
|
|
|
|
return bResult;
|
|
}
|
|
|
|
|
|
/*
|
|
alcGetProcAddress
|
|
|
|
Retrieves the function address for a particular extension function
|
|
*/
|
|
ALCAPI ALCvoid * ALCAPIENTRY alcGetProcAddress(ALCdevice *device, const ALCchar *funcName)
|
|
{
|
|
ALCvoid *pFunction = NULL;
|
|
ALsizei i = 0;
|
|
|
|
(void)device;
|
|
|
|
if (funcName)
|
|
{
|
|
while(alcFunctions[i].funcName &&
|
|
strcmp(alcFunctions[i].funcName,funcName) != 0)
|
|
i++;
|
|
pFunction = alcFunctions[i].address;
|
|
}
|
|
else
|
|
SetALCError(ALC_INVALID_VALUE);
|
|
|
|
return pFunction;
|
|
}
|
|
|
|
|
|
/*
|
|
alcGetEnumValue
|
|
|
|
Get the value for a particular ALC Enumerated Value
|
|
*/
|
|
ALCAPI ALCenum ALCAPIENTRY alcGetEnumValue(ALCdevice *device, const ALCchar *enumName)
|
|
{
|
|
ALsizei i = 0;
|
|
ALCenum val;
|
|
|
|
(void)device;
|
|
|
|
while ((enumeration[i].enumName)&&(strcmp(enumeration[i].enumName,enumName)))
|
|
i++;
|
|
val = enumeration[i].value;
|
|
|
|
if(!enumeration[i].enumName)
|
|
SetALCError(ALC_INVALID_VALUE);
|
|
|
|
return val;
|
|
}
|
|
|
|
|
|
/*
|
|
alcCreateContext
|
|
|
|
Create and attach a Context to a particular Device.
|
|
*/
|
|
ALCAPI ALCcontext* ALCAPIENTRY alcCreateContext(ALCdevice *device, const ALCint *attrList)
|
|
{
|
|
ALCcontext *ALContext = NULL;
|
|
ALuint ulAttributeIndex, ulRequestedStereoSources;
|
|
|
|
if ((device)&&(!device->IsCaptureDevice))
|
|
{
|
|
// Reset Context Last Error code
|
|
g_eLastContextError = ALC_NO_ERROR;
|
|
|
|
// Current implementation only allows one Context per Device
|
|
if(!device->Context)
|
|
{
|
|
ALContext = calloc(1, sizeof(ALCcontext));
|
|
if(!ALContext)
|
|
{
|
|
SetALCError(ALC_OUT_OF_MEMORY);
|
|
return NULL;
|
|
}
|
|
|
|
ALContext->Device = device;
|
|
InitContext(ALContext);
|
|
|
|
device->Context = ALContext;
|
|
|
|
SuspendContext(NULL);
|
|
|
|
ALContext->next = g_pContextList;
|
|
g_pContextList = ALContext;
|
|
g_ulContextCount++;
|
|
|
|
ProcessContext(NULL);
|
|
|
|
// Check for Voice Count attributes
|
|
if (attrList)
|
|
{
|
|
ulAttributeIndex = 0;
|
|
while ((ulAttributeIndex < 10) && (attrList[ulAttributeIndex]))
|
|
{
|
|
if (attrList[ulAttributeIndex] == ALC_STEREO_SOURCES)
|
|
{
|
|
ulRequestedStereoSources = attrList[ulAttributeIndex + 1];
|
|
|
|
if (ulRequestedStereoSources > ALContext->Device->MaxNoOfSources)
|
|
ulRequestedStereoSources = ALContext->Device->MaxNoOfSources;
|
|
|
|
ALContext->lNumStereoSources = ulRequestedStereoSources;
|
|
ALContext->lNumMonoSources = ALContext->Device->MaxNoOfSources - ALContext->lNumStereoSources;
|
|
break;
|
|
}
|
|
|
|
ulAttributeIndex += 2;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
SetALCError(ALC_INVALID_VALUE);
|
|
ALContext = NULL;
|
|
}
|
|
}
|
|
else
|
|
SetALCError(ALC_INVALID_DEVICE);
|
|
|
|
return ALContext;
|
|
}
|
|
|
|
|
|
/*
|
|
alcDestroyContext
|
|
|
|
Remove a Context
|
|
*/
|
|
ALCAPI ALCvoid ALCAPIENTRY alcDestroyContext(ALCcontext *context)
|
|
{
|
|
ALCcontext **list;
|
|
|
|
// Lock context list
|
|
SuspendContext(NULL);
|
|
|
|
if (IsContext(context))
|
|
{
|
|
// Lock context
|
|
SuspendContext(context);
|
|
|
|
ReleaseALSources(context);
|
|
ReleaseALAuxiliaryEffectSlots(context);
|
|
|
|
context->Device->Context = NULL;
|
|
|
|
list = &g_pContextList;
|
|
while(*list != context)
|
|
list = &(*list)->next;
|
|
|
|
*list = (*list)->next;
|
|
g_ulContextCount--;
|
|
|
|
// Unlock context
|
|
ProcessContext(context);
|
|
|
|
ExitContext(context);
|
|
|
|
// Free memory (MUST do this after ProcessContext)
|
|
memset(context, 0, sizeof(ALCcontext));
|
|
free(context);
|
|
}
|
|
else
|
|
SetALCError(ALC_INVALID_CONTEXT);
|
|
|
|
ProcessContext(NULL);
|
|
}
|
|
|
|
|
|
/*
|
|
alcGetCurrentContext
|
|
|
|
Returns the currently active Context
|
|
*/
|
|
ALCAPI ALCcontext * ALCAPIENTRY alcGetCurrentContext(ALCvoid)
|
|
{
|
|
ALCcontext *pContext = NULL;
|
|
|
|
SuspendContext(NULL);
|
|
|
|
pContext = g_pContextList;
|
|
while ((pContext) && (!pContext->InUse))
|
|
pContext = pContext->next;
|
|
|
|
ProcessContext(NULL);
|
|
|
|
return pContext;
|
|
}
|
|
|
|
|
|
/*
|
|
alcGetContextsDevice
|
|
|
|
Returns the Device that a particular Context is attached to
|
|
*/
|
|
ALCAPI ALCdevice* ALCAPIENTRY alcGetContextsDevice(ALCcontext *pContext)
|
|
{
|
|
ALCdevice *pDevice = NULL;
|
|
|
|
SuspendContext(NULL);
|
|
if (IsContext(pContext))
|
|
pDevice = pContext->Device;
|
|
else
|
|
SetALCError(ALC_INVALID_CONTEXT);
|
|
ProcessContext(NULL);
|
|
|
|
return pDevice;
|
|
}
|
|
|
|
|
|
/*
|
|
alcMakeContextCurrent
|
|
|
|
Makes the given Context the active Context
|
|
*/
|
|
ALCAPI ALCboolean ALCAPIENTRY alcMakeContextCurrent(ALCcontext *context)
|
|
{
|
|
ALCcontext *ALContext;
|
|
ALboolean bReturn = AL_TRUE;
|
|
|
|
SuspendContext(NULL);
|
|
|
|
// context must be a valid Context or NULL
|
|
if ((IsContext(context)) || (context == NULL))
|
|
{
|
|
if ((ALContext=alcGetCurrentContext()))
|
|
{
|
|
SuspendContext(ALContext);
|
|
ALContext->InUse=AL_FALSE;
|
|
ProcessContext(ALContext);
|
|
}
|
|
|
|
if ((ALContext=context) && (ALContext->Device))
|
|
{
|
|
SuspendContext(ALContext);
|
|
ALContext->InUse=AL_TRUE;
|
|
ProcessContext(ALContext);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
SetALCError(ALC_INVALID_CONTEXT);
|
|
bReturn = AL_FALSE;
|
|
}
|
|
|
|
ProcessContext(NULL);
|
|
|
|
return bReturn;
|
|
}
|
|
|
|
|
|
/*
|
|
alcOpenDevice
|
|
|
|
Open the Device specified.
|
|
*/
|
|
ALCAPI ALCdevice* ALCAPIENTRY alcOpenDevice(const ALCchar *deviceName)
|
|
{
|
|
ALboolean bDeviceFound = AL_FALSE;
|
|
ALCdevice *device;
|
|
ALint i;
|
|
|
|
InitAL();
|
|
|
|
if(deviceName && !deviceName[0])
|
|
deviceName = NULL;
|
|
|
|
device = malloc(sizeof(ALCdevice));
|
|
if (device)
|
|
{
|
|
const char *fmt;
|
|
|
|
//Initialise device structure
|
|
memset(device, 0, sizeof(ALCdevice));
|
|
|
|
//Validate device
|
|
device->InUse = AL_TRUE;
|
|
device->IsCaptureDevice = AL_FALSE;
|
|
|
|
//Set output format
|
|
device->Frequency = GetConfigValueInt(NULL, "frequency", SWMIXER_OUTPUT_RATE);
|
|
if((ALint)device->Frequency <= 0)
|
|
device->Frequency = SWMIXER_OUTPUT_RATE;
|
|
|
|
fmt = GetConfigValue(NULL, "format", "AL_FORMAT_STEREO16");
|
|
if(fmt[0])
|
|
device->Format = alGetEnumValue(fmt);
|
|
|
|
device->Channels = aluChannelsFromFormat(device->Format);
|
|
if(!device->Channels)
|
|
{
|
|
device->Format = AL_FORMAT_STEREO16;
|
|
device->Channels = 2;
|
|
device->FrameSize = 4;
|
|
}
|
|
else
|
|
device->FrameSize = aluBytesFromFormat(device->Format) *
|
|
device->Channels;
|
|
|
|
device->UpdateFreq = GetConfigValueInt(NULL, "refresh", 0);
|
|
if((ALint)device->UpdateFreq <= 0)
|
|
device->UpdateFreq = 8192 * device->Frequency / 22050;
|
|
|
|
// Find a playback device to open
|
|
for(i = 0;BackendList[i].Init;i++)
|
|
{
|
|
device->Funcs = &BackendList[i].Funcs;
|
|
if(ALCdevice_OpenPlayback(device, deviceName))
|
|
{
|
|
SuspendContext(NULL);
|
|
device->next = g_pDeviceList;
|
|
g_pDeviceList = device;
|
|
g_ulDeviceCount++;
|
|
ProcessContext(NULL);
|
|
|
|
bDeviceFound = AL_TRUE;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!bDeviceFound)
|
|
{
|
|
// No suitable output device found
|
|
free(device);
|
|
device = NULL;
|
|
}
|
|
}
|
|
|
|
return device;
|
|
}
|
|
|
|
|
|
/*
|
|
alcCloseDevice
|
|
|
|
Close the specified Device
|
|
*/
|
|
ALCAPI ALCboolean ALCAPIENTRY alcCloseDevice(ALCdevice *pDevice)
|
|
{
|
|
ALCboolean bReturn = ALC_FALSE;
|
|
ALCdevice **list;
|
|
|
|
if ((pDevice)&&(!pDevice->IsCaptureDevice))
|
|
{
|
|
SuspendContext(NULL);
|
|
|
|
list = &g_pDeviceList;
|
|
while(*list != pDevice)
|
|
list = &(*list)->next;
|
|
|
|
*list = (*list)->next;
|
|
g_ulDeviceCount--;
|
|
|
|
ProcessContext(NULL);
|
|
|
|
if(pDevice->Context)
|
|
alcDestroyContext(pDevice->Context);
|
|
ALCdevice_ClosePlayback(pDevice);
|
|
|
|
//Release device structure
|
|
memset(pDevice, 0, sizeof(ALCdevice));
|
|
free(pDevice);
|
|
|
|
bReturn = ALC_TRUE;
|
|
}
|
|
else
|
|
SetALCError(ALC_INVALID_DEVICE);
|
|
|
|
return bReturn;
|
|
}
|
|
|
|
|
|
ALCvoid ReleaseALC(ALCvoid)
|
|
{
|
|
ALCdevice *Dev;
|
|
|
|
#ifdef _DEBUG
|
|
if(g_ulContextCount > 0)
|
|
AL_PRINT("exit() %u device(s) and %u context(s) NOT deleted\n", g_ulDeviceCount, g_ulContextCount);
|
|
#endif
|
|
|
|
while(g_pDeviceList)
|
|
{
|
|
Dev = g_pDeviceList;
|
|
g_pDeviceList = g_pDeviceList->next;
|
|
if(Dev->IsCaptureDevice)
|
|
alcCaptureCloseDevice(Dev);
|
|
else
|
|
alcCloseDevice(Dev);
|
|
}
|
|
}
|
|
|
|
///////////////////////////////////////////////////////
|