AuroraOpenALSoft/OpenAL32/alBuffer.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
 */

#include "config.h"

#include <stdlib.h>
#include <stdio.h>
#include <assert.h>
#include <limits.h>

#include "alMain.h"
#include "AL/al.h"
#include "AL/alc.h"
#include "alError.h"
#include "alBuffer.h"
#include "alThunk.h"


static ALenum LoadData(ALbuffer *ALBuf, ALuint freq, ALenum NewFormat, ALsizei frames, enum UserFmtChannels chans, enum UserFmtType type, const ALvoid *data, ALboolean storesrc);
static void ConvertData(ALvoid *dst, enum UserFmtType dstType, const ALvoid *src, enum UserFmtType srcType, ALsizei numchans, ALsizei len);
static ALboolean IsValidType(ALenum type);
static ALboolean IsValidChannels(ALenum channels);

#define LookupBuffer(m, k) ((ALbuffer*)LookupUIntMapKey(&(m), (k)))
#define RemoveBuffer(m, k) ((ALbuffer*)PopUIntMapValue(&(m), (k)))


/*
 * Global Variables
 */

/* IMA ADPCM Stepsize table */
static const long IMAStep_size[89] = {
       7,    8,    9,   10,   11,   12,   13,   14,   16,   17,   19,
      21,   23,   25,   28,   31,   34,   37,   41,   45,   50,   55,
      60,   66,   73,   80,   88,   97,  107,  118,  130,  143,  157,
     173,  190,  209,  230,  253,  279,  307,  337,  371,  408,  449,
     494,  544,  598,  658,  724,  796,  876,  963, 1060, 1166, 1282,
    1411, 1552, 1707, 1878, 2066, 2272, 2499, 2749, 3024, 3327, 3660,
    4026, 4428, 4871, 5358, 5894, 6484, 7132, 7845, 8630, 9493,10442,
   11487,12635,13899,15289,16818,18500,20350,22358,24633,27086,29794,
   32767
};

/* IMA4 ADPCM Codeword decode table */
static const long IMA4Codeword[16] = {
    1, 3, 5, 7, 9, 11, 13, 15,
   -1,-3,-5,-7,-9,-11,-13,-15,
};

/* IMA4 ADPCM Step index adjust decode table */
static const long IMA4Index_adjust[16] = {
   -1,-1,-1,-1, 2, 4, 6, 8,
   -1,-1,-1,-1, 2, 4, 6, 8
};

/* A quick'n'dirty lookup table to decode a muLaw-encoded byte sample into a
 * signed 16-bit sample */
static const ALshort muLawDecompressionTable[256] = {
    -32124,-31100,-30076,-29052,-28028,-27004,-25980,-24956,
    -23932,-22908,-21884,-20860,-19836,-18812,-17788,-16764,
    -15996,-15484,-14972,-14460,-13948,-13436,-12924,-12412,
    -11900,-11388,-10876,-10364, -9852, -9340, -8828, -8316,
     -7932, -7676, -7420, -7164, -6908, -6652, -6396, -6140,
     -5884, -5628, -5372, -5116, -4860, -4604, -4348, -4092,
     -3900, -3772, -3644, -3516, -3388, -3260, -3132, -3004,
     -2876, -2748, -2620, -2492, -2364, -2236, -2108, -1980,
     -1884, -1820, -1756, -1692, -1628, -1564, -1500, -1436,
     -1372, -1308, -1244, -1180, -1116, -1052,  -988,  -924,
      -876,  -844,  -812,  -780,  -748,  -716,  -684,  -652,
      -620,  -588,  -556,  -524,  -492,  -460,  -428,  -396,
      -372,  -356,  -340,  -324,  -308,  -292,  -276,  -260,
      -244,  -228,  -212,  -196,  -180,  -164,  -148,  -132,
      -120,  -112,  -104,   -96,   -88,   -80,   -72,   -64,
       -56,   -48,   -40,   -32,   -24,   -16,    -8,     0,
     32124, 31100, 30076, 29052, 28028, 27004, 25980, 24956,
     23932, 22908, 21884, 20860, 19836, 18812, 17788, 16764,
     15996, 15484, 14972, 14460, 13948, 13436, 12924, 12412,
     11900, 11388, 10876, 10364,  9852,  9340,  8828,  8316,
      7932,  7676,  7420,  7164,  6908,  6652,  6396,  6140,
      5884,  5628,  5372,  5116,  4860,  4604,  4348,  4092,
      3900,  3772,  3644,  3516,  3388,  3260,  3132,  3004,
      2876,  2748,  2620,  2492,  2364,  2236,  2108,  1980,
      1884,  1820,  1756,  1692,  1628,  1564,  1500,  1436,
      1372,  1308,  1244,  1180,  1116,  1052,   988,   924,
       876,   844,   812,   780,   748,   716,   684,   652,
       620,   588,   556,   524,   492,   460,   428,   396,
       372,   356,   340,   324,   308,   292,   276,   260,
       244,   228,   212,   196,   180,   164,   148,   132,
       120,   112,   104,    96,    88,    80,    72,    64,
        56,    48,    40,    32,    24,    16,     8,     0
};

/* Values used when encoding a muLaw sample */
static const int muLawBias = 0x84;
static const int muLawClip = 32635;
static const char muLawCompressTable[256] =
{
     0,0,1,1,2,2,2,2,3,3,3,3,3,3,3,3,
     4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
     5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,
     5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,
     6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
     6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
     6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
     6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
     7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
     7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
     7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
     7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
     7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
     7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
     7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
     7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7
};


/*
 *    alGenBuffers(ALsizei n, ALuint *buffers)
 *
 *    Generates n AL Buffers, and stores the Buffers Names in the array pointed
 *    to by buffers
 */
AL_API ALvoid AL_APIENTRY alGenBuffers(ALsizei n, ALuint *buffers)
{
    ALCcontext *Context;
    ALsizei i=0;

    Context = GetContextRef();
    if(!Context) return;

    /* Check that we are actually generating some Buffers */
    if(n < 0 || IsBadWritePtr((void*)buffers, n * sizeof(ALuint)))
        alSetError(Context, AL_INVALID_VALUE);
    else
    {
        ALCdevice *device = Context->Device;
        ALenum err;

        // Create all the new Buffers
        while(i < n)
        {
            ALbuffer *buffer = calloc(1, sizeof(ALbuffer));
            if(!buffer)
            {
                alSetError(Context, AL_OUT_OF_MEMORY);
                alDeleteBuffers(i, buffers);
                break;
            }
            RWLockInit(&buffer->lock);

            err = NewThunkEntry(&buffer->buffer);
            if(err == AL_NO_ERROR)
                err = InsertUIntMapEntry(&device->BufferMap, buffer->buffer, buffer);
            if(err != AL_NO_ERROR)
            {
                FreeThunkEntry(buffer->buffer);
                memset(buffer, 0, sizeof(ALbuffer));
                free(buffer);

                alSetError(Context, err);
                alDeleteBuffers(i, buffers);
                break;
            }

            buffers[i++] = buffer->buffer;
        }
    }

    ALCcontext_DecRef(Context);
}

/*
 *    alDeleteBuffers(ALsizei n, ALuint *buffers)
 *
 *    Deletes the n AL Buffers pointed to by buffers
 */
AL_API ALvoid AL_APIENTRY alDeleteBuffers(ALsizei n, const ALuint *buffers)
{
    ALCcontext *Context;
    ALCdevice *device;
    ALbuffer *ALBuf;
    ALsizei i;

    Context = GetContextRef();
    if(!Context) return;

    device = Context->Device;
    /* Check we are actually Deleting some Buffers */
    if(n < 0)
        alSetError(Context, AL_INVALID_VALUE);
    else
    {
        /* Check that all the buffers are valid and can actually be deleted */
        for(i = 0;i < n;i++)
        {
            if(!buffers[i])
                continue;

            /* Check for valid Buffer ID */
            if((ALBuf=LookupBuffer(device->BufferMap, buffers[i])) == NULL)
            {
                alSetError(Context, AL_INVALID_NAME);
                n = 0;
                break;
            }
            else if(ALBuf->ref != 0)
            {
                /* Buffer still in use, cannot be deleted */
                alSetError(Context, AL_INVALID_OPERATION);
                n = 0;
                break;
            }
        }

        for(i = 0;i < n;i++)
        {
            if((ALBuf=RemoveBuffer(device->BufferMap, buffers[i])) == NULL)
                continue;
            FreeThunkEntry(ALBuf->buffer);

            /* Release the memory used to store audio data */
            free(ALBuf->data);

            /* Release buffer structure */
            memset(ALBuf, 0, sizeof(ALbuffer));
            free(ALBuf);
        }
    }

    ALCcontext_DecRef(Context);
}

/*
 *    alIsBuffer(ALuint buffer)
 *
 *    Checks if buffer is a valid Buffer Name
 */
AL_API ALboolean AL_APIENTRY alIsBuffer(ALuint buffer)
{
    ALCcontext *Context;
    ALboolean  result;

    Context = GetContextRef();
    if(!Context) return AL_FALSE;

    result = ((!buffer || LookupBuffer(Context->Device->BufferMap, buffer)) ?
              AL_TRUE : AL_FALSE);

    ALCcontext_DecRef(Context);

    return result;
}

/*
 *    alBufferData(ALuint buffer, ALenum format, const ALvoid *data,
 *                 ALsizei size, ALsizei freq)
 *
 *    Fill buffer with audio data
 */
AL_API ALvoid AL_APIENTRY alBufferData(ALuint buffer,ALenum format,const ALvoid *data,ALsizei size,ALsizei freq)
{
    enum UserFmtChannels SrcChannels;
    enum UserFmtType SrcType;
    ALCcontext *Context;
    ALCdevice *device;
    ALbuffer *ALBuf;
    ALenum err;

    Context = GetContextRef();
    if(!Context) return;

    device = Context->Device;
    if((ALBuf=LookupBuffer(device->BufferMap, buffer)) == NULL)
        alSetError(Context, AL_INVALID_NAME);
    else if(size < 0 || freq < 0)
        alSetError(Context, AL_INVALID_VALUE);
    else if(DecomposeUserFormat(format, &SrcChannels, &SrcType) == AL_FALSE)
        alSetError(Context, AL_INVALID_ENUM);
    else switch(SrcType)
    {
        case UserFmtByte:
        case UserFmtUByte:
        case UserFmtShort:
        case UserFmtUShort:
        case UserFmtInt:
        case UserFmtUInt:
        case UserFmtFloat: {
            ALuint FrameSize = FrameSizeFromUserFmt(SrcChannels, SrcType);
            if((size%FrameSize) != 0)
                err = AL_INVALID_VALUE;
            else
                err = LoadData(ALBuf, freq, format, size/FrameSize,
                               SrcChannels, SrcType, data, AL_TRUE);
            if(err != AL_NO_ERROR)
                alSetError(Context, err);
        }   break;

        case UserFmtByte3:
        case UserFmtUByte3:
        case UserFmtDouble: {
            ALuint FrameSize = FrameSizeFromUserFmt(SrcChannels, SrcType);
            ALenum NewFormat = AL_FORMAT_MONO_FLOAT32;
            switch(SrcChannels)
            {
                case UserFmtMono: NewFormat = AL_FORMAT_MONO_FLOAT32; break;
                case UserFmtStereo: NewFormat = AL_FORMAT_STEREO_FLOAT32; break;
                case UserFmtRear: NewFormat = AL_FORMAT_REAR32; break;
                case UserFmtQuad: NewFormat = AL_FORMAT_QUAD32; break;
                case UserFmtX51: NewFormat = AL_FORMAT_51CHN32; break;
                case UserFmtX61: NewFormat = AL_FORMAT_61CHN32; break;
                case UserFmtX71: NewFormat = AL_FORMAT_71CHN32; break;
            }
            if((size%FrameSize) != 0)
                err = AL_INVALID_VALUE;
            else
                err = LoadData(ALBuf, freq, NewFormat, size/FrameSize,
                               SrcChannels, SrcType, data, AL_TRUE);
            if(err != AL_NO_ERROR)
                alSetError(Context, err);
        }   break;

        case UserFmtMulaw:
        case UserFmtIMA4: {
            /* Here is where things vary:
             * nVidia and Apple use 64+1 sample frames per block -> block_size=36 bytes per channel
             * Most PC sound software uses 2040+1 sample frames per block -> block_size=1024 bytes per channel
             */
            ALuint FrameSize = (SrcType == UserFmtIMA4) ?
                               (ChannelsFromUserFmt(SrcChannels) * 36) :
                               FrameSizeFromUserFmt(SrcChannels, SrcType);
            ALenum NewFormat = AL_FORMAT_MONO16;
            switch(SrcChannels)
            {
                case UserFmtMono: NewFormat = AL_FORMAT_MONO16; break;
                case UserFmtStereo: NewFormat = AL_FORMAT_STEREO16; break;
                case UserFmtRear: NewFormat = AL_FORMAT_REAR16; break;
                case UserFmtQuad: NewFormat = AL_FORMAT_QUAD16; break;
                case UserFmtX51: NewFormat = AL_FORMAT_51CHN16; break;
                case UserFmtX61: NewFormat = AL_FORMAT_61CHN16; break;
                case UserFmtX71: NewFormat = AL_FORMAT_71CHN16; break;
            }
            if((size%FrameSize) != 0)
                err = AL_INVALID_VALUE;
            else
                err = LoadData(ALBuf, freq, NewFormat, size/FrameSize,
                               SrcChannels, SrcType, data, AL_TRUE);
            if(err != AL_NO_ERROR)
                alSetError(Context, err);
        }   break;
    }

    ALCcontext_DecRef(Context);
}

/*
 *    alBufferSubDataSOFT(ALuint buffer, ALenum format, const ALvoid *data,
 *                        ALsizei offset, ALsizei length)
 *
 *    Update buffer's audio data
 */
AL_API ALvoid AL_APIENTRY alBufferSubDataSOFT(ALuint buffer,ALenum format,const ALvoid *data,ALsizei offset,ALsizei length)
{
    enum UserFmtChannels SrcChannels;
    enum UserFmtType SrcType;
    ALCcontext *Context;
    ALCdevice  *device;
    ALbuffer   *ALBuf;

    Context = GetContextRef();
    if(!Context) return;

    device = Context->Device;
    if((ALBuf=LookupBuffer(device->BufferMap, buffer)) == NULL)
        alSetError(Context, AL_INVALID_NAME);
    else if(length < 0 || offset < 0 || (length > 0 && data == NULL))
        alSetError(Context, AL_INVALID_VALUE);
    else if(DecomposeUserFormat(format, &SrcChannels, &SrcType) == AL_FALSE)
        alSetError(Context, AL_INVALID_ENUM);
    else
    {
        WriteLock(&ALBuf->lock);
        if(SrcChannels != ALBuf->OriginalChannels || SrcType != ALBuf->OriginalType)
            alSetError(Context, AL_INVALID_ENUM);
        else if(offset > ALBuf->OriginalSize ||
                length > ALBuf->OriginalSize-offset ||
                (offset%ALBuf->OriginalAlign) != 0 ||
                (length%ALBuf->OriginalAlign) != 0)
            alSetError(Context, AL_INVALID_VALUE);
        else
        {
            ALuint Channels = ChannelsFromFmt(ALBuf->FmtChannels);
            ALuint Bytes = BytesFromFmt(ALBuf->FmtType);
            if(SrcType == UserFmtIMA4)
            {
                /* offset -> byte offset, length -> block count */
                offset /= 36;
                offset *= 65;
                offset *= Bytes;
                length /= ALBuf->OriginalAlign;
            }
            else
            {
                ALuint OldBytes = BytesFromUserFmt(SrcType);

                offset /= OldBytes;
                offset *= Bytes;
                length /= OldBytes * Channels;
            }
            ConvertData(&((ALubyte*)ALBuf->data)[offset], ALBuf->FmtType,
                        data, SrcType, Channels, length);
        }
        WriteUnlock(&ALBuf->lock);
    }

    ALCcontext_DecRef(Context);
}


AL_API void AL_APIENTRY alBufferSamplesSOFT(ALuint buffer,
  ALuint samplerate, ALenum internalformat, ALsizei frames,
  ALenum channels, ALenum type, const ALvoid *data)
{
    ALCcontext *Context;
    ALCdevice *device;
    ALbuffer *ALBuf;
    ALenum err;

    Context = GetContextRef();
    if(!Context) return;

    device = Context->Device;
    if((ALBuf=LookupBuffer(device->BufferMap, buffer)) == NULL)
        alSetError(Context, AL_INVALID_NAME);
    else if(frames < 0 || samplerate == 0)
        alSetError(Context, AL_INVALID_VALUE);
    else if(IsValidType(type) == AL_FALSE || IsValidChannels(channels) == AL_FALSE)
        alSetError(Context, AL_INVALID_ENUM);
    else
    {
        err = AL_NO_ERROR;
        if(type == UserFmtIMA4)
        {
            if((frames%65) == 0) frames /= 65;
            else err = AL_INVALID_VALUE;
        }
        if(err == AL_NO_ERROR)
            err = LoadData(ALBuf, samplerate, internalformat, frames,
                           channels, type, data, AL_FALSE);
        if(err != AL_NO_ERROR)
            alSetError(Context, err);
    }

    ALCcontext_DecRef(Context);
}

AL_API void AL_APIENTRY alBufferSubSamplesSOFT(ALuint buffer,
  ALsizei offset, ALsizei frames,
  ALenum channels, ALenum type, const ALvoid *data)
{
    ALCcontext *Context;
    ALCdevice  *device;
    ALbuffer   *ALBuf;

    Context = GetContextRef();
    if(!Context) return;

    device = Context->Device;
    if((ALBuf=LookupBuffer(device->BufferMap, buffer)) == NULL)
        alSetError(Context, AL_INVALID_NAME);
    else if(frames < 0 || offset < 0 || (frames > 0 && data == NULL))
        alSetError(Context, AL_INVALID_VALUE);
    else if(IsValidType(type) == AL_FALSE)
        alSetError(Context, AL_INVALID_ENUM);
    else
    {
        ALuint FrameSize;
        ALuint FrameCount;

        WriteLock(&ALBuf->lock);
        FrameSize = FrameSizeFromFmt(ALBuf->FmtChannels, ALBuf->FmtType);
        FrameCount = ALBuf->size / FrameSize;
        if(channels != (ALenum)ALBuf->FmtChannels)
            alSetError(Context, AL_INVALID_ENUM);
        else if((ALuint)offset > FrameCount || (ALuint)frames > FrameCount-offset)
            alSetError(Context, AL_INVALID_VALUE);
        else if(type == UserFmtIMA4 && (frames%65) != 0)
            alSetError(Context, AL_INVALID_VALUE);
        else
        {
            /* offset -> byte offset */
            offset *= FrameSize;
            /* frames -> IMA4 block count */
            if(type == UserFmtIMA4) frames /= 65;
            ConvertData(&((ALubyte*)ALBuf->data)[offset], ALBuf->FmtType,
                        data, type,
                        ChannelsFromFmt(ALBuf->FmtChannels), frames);
        }
        WriteUnlock(&ALBuf->lock);
    }

    ALCcontext_DecRef(Context);
}

AL_API void AL_APIENTRY alGetBufferSamplesSOFT(ALuint buffer,
  ALsizei offset, ALsizei frames,
  ALenum channels, ALenum type, ALvoid *data)
{
    ALCcontext *Context;
    ALCdevice  *device;
    ALbuffer   *ALBuf;

    Context = GetContextRef();
    if(!Context) return;

    device = Context->Device;
    if((ALBuf=LookupBuffer(device->BufferMap, buffer)) == NULL)
        alSetError(Context, AL_INVALID_NAME);
    else if(frames < 0 || offset < 0 || (frames > 0 && data == NULL))
        alSetError(Context, AL_INVALID_VALUE);
    else if(IsValidType(type) == AL_FALSE)
        alSetError(Context, AL_INVALID_ENUM);
    else
    {
        ALuint FrameSize;
        ALuint FrameCount;

        ReadLock(&ALBuf->lock);
        FrameSize = FrameSizeFromFmt(ALBuf->FmtChannels, ALBuf->FmtType);
        FrameCount = ALBuf->size / FrameSize;
        if(channels != (ALenum)ALBuf->FmtChannels)
            alSetError(Context, AL_INVALID_ENUM);
        else if((ALuint)offset > FrameCount || (ALuint)frames > FrameCount-offset)
            alSetError(Context, AL_INVALID_VALUE);
        else if(type == UserFmtIMA4 && (frames%65) != 0)
            alSetError(Context, AL_INVALID_VALUE);
        else
        {
            /* offset -> byte offset */
            offset *= FrameSize;
            /* frames -> IMA4 block count */
            if(type == UserFmtIMA4) frames /= 65;
            ConvertData(data, type,
                        &((ALubyte*)ALBuf->data)[offset], ALBuf->FmtType,
                        ChannelsFromFmt(ALBuf->FmtChannels), frames);
        }
        ReadUnlock(&ALBuf->lock);
    }

    ALCcontext_DecRef(Context);
}

AL_API ALboolean AL_APIENTRY alIsBufferFormatSupportedSOFT(ALenum format)
{
    enum FmtChannels DstChannels;
    enum FmtType DstType;
    ALCcontext *Context;
    ALboolean ret;

    Context = GetContextRef();
    if(!Context) return AL_FALSE;

    ret = DecomposeFormat(format, &DstChannels, &DstType);

    ALCcontext_DecRef(Context);

    return ret;
}


AL_API void AL_APIENTRY alBufferf(ALuint buffer, ALenum eParam, ALfloat flValue)
{
    ALCcontext    *pContext;
    ALCdevice     *device;

    (void)flValue;

    pContext = GetContextRef();
    if(!pContext) return;

    device = pContext->Device;
    if(LookupBuffer(device->BufferMap, buffer) == NULL)
        alSetError(pContext, AL_INVALID_NAME);
    else
    {
        switch(eParam)
        {
        default:
            alSetError(pContext, AL_INVALID_ENUM);
            break;
        }
    }

    ALCcontext_DecRef(pContext);
}


AL_API void AL_APIENTRY alBuffer3f(ALuint buffer, ALenum eParam, ALfloat flValue1, ALfloat flValue2, ALfloat flValue3)
{
    ALCcontext    *pContext;
    ALCdevice     *device;

    (void)flValue1;
    (void)flValue2;
    (void)flValue3;

    pContext = GetContextRef();
    if(!pContext) return;

    device = pContext->Device;
    if(LookupBuffer(device->BufferMap, buffer) == NULL)
        alSetError(pContext, AL_INVALID_NAME);
    else
    {
        switch(eParam)
        {
        default:
            alSetError(pContext, AL_INVALID_ENUM);
            break;
        }
    }

    ALCcontext_DecRef(pContext);
}


AL_API void AL_APIENTRY alBufferfv(ALuint buffer, ALenum eParam, const ALfloat* flValues)
{
    ALCcontext    *pContext;
    ALCdevice     *device;

    pContext = GetContextRef();
    if(!pContext) return;

    device = pContext->Device;
    if(!flValues)
        alSetError(pContext, AL_INVALID_VALUE);
    else if(LookupBuffer(device->BufferMap, buffer) == NULL)
        alSetError(pContext, AL_INVALID_NAME);
    else
    {
        switch(eParam)
        {
        default:
            alSetError(pContext, AL_INVALID_ENUM);
            break;
        }
    }

    ALCcontext_DecRef(pContext);
}


AL_API void AL_APIENTRY alBufferi(ALuint buffer, ALenum eParam, ALint lValue)
{
    ALCcontext    *pContext;
    ALCdevice     *device;

    (void)lValue;

    pContext = GetContextRef();
    if(!pContext) return;

    device = pContext->Device;
    if(LookupBuffer(device->BufferMap, buffer) == NULL)
        alSetError(pContext, AL_INVALID_NAME);
    else
    {
        switch(eParam)
        {
        default:
            alSetError(pContext, AL_INVALID_ENUM);
            break;
        }
    }

    ALCcontext_DecRef(pContext);
}


AL_API void AL_APIENTRY alBuffer3i( ALuint buffer, ALenum eParam, ALint lValue1, ALint lValue2, ALint lValue3)
{
    ALCcontext    *pContext;
    ALCdevice     *device;

    (void)lValue1;
    (void)lValue2;
    (void)lValue3;

    pContext = GetContextRef();
    if(!pContext) return;

    device = pContext->Device;
    if(LookupBuffer(device->BufferMap, buffer) == NULL)
        alSetError(pContext, AL_INVALID_NAME);
    else
    {
        switch(eParam)
        {
        default:
            alSetError(pContext, AL_INVALID_ENUM);
            break;
        }
    }

    ALCcontext_DecRef(pContext);
}


AL_API void AL_APIENTRY alBufferiv(ALuint buffer, ALenum eParam, const ALint* plValues)
{
    ALCcontext    *pContext;
    ALCdevice     *device;
    ALbuffer      *ALBuf;

    pContext = GetContextRef();
    if(!pContext) return;

    device = pContext->Device;
    if(!plValues)
        alSetError(pContext, AL_INVALID_VALUE);
    else if((ALBuf=LookupBuffer(device->BufferMap, buffer)) == NULL)
        alSetError(pContext, AL_INVALID_NAME);
    else
    {
        switch(eParam)
        {
        case AL_LOOP_POINTS_SOFT:
            WriteLock(&ALBuf->lock);
            if(ALBuf->ref != 0)
                alSetError(pContext, AL_INVALID_OPERATION);
            else if(plValues[0] < 0 || plValues[1] < 0 ||
                    plValues[0] >= plValues[1] || ALBuf->size == 0)
                alSetError(pContext, AL_INVALID_VALUE);
            else
            {
                ALint maxlen = ALBuf->size /
                               FrameSizeFromFmt(ALBuf->FmtChannels, ALBuf->FmtType);
                if(plValues[0] > maxlen || plValues[1] > maxlen)
                    alSetError(pContext, AL_INVALID_VALUE);
                else
                {
                    ALBuf->LoopStart = plValues[0];
                    ALBuf->LoopEnd = plValues[1];
                }
            }
            WriteUnlock(&ALBuf->lock);
            break;

        default:
            alSetError(pContext, AL_INVALID_ENUM);
            break;
        }
    }

    ALCcontext_DecRef(pContext);
}


AL_API ALvoid AL_APIENTRY alGetBufferf(ALuint buffer, ALenum eParam, ALfloat *pflValue)
{
    ALCcontext    *pContext;
    ALCdevice     *device;

    pContext = GetContextRef();
    if(!pContext) return;

    device = pContext->Device;
    if(!pflValue)
        alSetError(pContext, AL_INVALID_VALUE);
    else if(LookupBuffer(device->BufferMap, buffer) == NULL)
        alSetError(pContext, AL_INVALID_NAME);
    else
    {
        switch(eParam)
        {
        default:
            alSetError(pContext, AL_INVALID_ENUM);
            break;
        }
    }

    ALCcontext_DecRef(pContext);
}


AL_API void AL_APIENTRY alGetBuffer3f(ALuint buffer, ALenum eParam, ALfloat* pflValue1, ALfloat* pflValue2, ALfloat* pflValue3)
{
    ALCcontext    *pContext;
    ALCdevice     *device;

    pContext = GetContextRef();
    if(!pContext) return;

    device = pContext->Device;
    if(!pflValue1 || !pflValue2 || !pflValue3)
        alSetError(pContext, AL_INVALID_VALUE);
    else if(LookupBuffer(device->BufferMap, buffer) == NULL)
        alSetError(pContext, AL_INVALID_NAME);
    else
    {
        switch(eParam)
        {
        default:
            alSetError(pContext, AL_INVALID_ENUM);
            break;
        }
    }

    ALCcontext_DecRef(pContext);
}


AL_API void AL_APIENTRY alGetBufferfv(ALuint buffer, ALenum eParam, ALfloat* pflValues)
{
    ALCcontext    *pContext;
    ALCdevice     *device;

    pContext = GetContextRef();
    if(!pContext) return;

    device = pContext->Device;
    if(!pflValues)
        alSetError(pContext, AL_INVALID_VALUE);
    else if(LookupBuffer(device->BufferMap, buffer) == NULL)
        alSetError(pContext, AL_INVALID_NAME);
    else
    {
        switch(eParam)
        {
        default:
            alSetError(pContext, AL_INVALID_ENUM);
            break;
        }
    }

    ALCcontext_DecRef(pContext);
}


AL_API ALvoid AL_APIENTRY alGetBufferi(ALuint buffer, ALenum eParam, ALint *plValue)
{
    ALCcontext    *pContext;
    ALbuffer      *pBuffer;
    ALCdevice     *device;

    pContext = GetContextRef();
    if(!pContext) return;

    device = pContext->Device;
    if(!plValue)
        alSetError(pContext, AL_INVALID_VALUE);
    else if((pBuffer=LookupBuffer(device->BufferMap, buffer)) == NULL)
        alSetError(pContext, AL_INVALID_NAME);
    else
    {
        switch(eParam)
        {
        case AL_FREQUENCY:
            *plValue = pBuffer->Frequency;
            break;

        case AL_BITS:
            *plValue = BytesFromFmt(pBuffer->FmtType) * 8;
            break;

        case AL_CHANNELS:
            *plValue = ChannelsFromFmt(pBuffer->FmtChannels);
            break;

        case AL_SIZE:
            *plValue = pBuffer->size;
            break;

        default:
            alSetError(pContext, AL_INVALID_ENUM);
            break;
        }
    }

    ALCcontext_DecRef(pContext);
}


AL_API void AL_APIENTRY alGetBuffer3i(ALuint buffer, ALenum eParam, ALint* plValue1, ALint* plValue2, ALint* plValue3)
{
    ALCcontext    *pContext;
    ALCdevice     *device;

    pContext = GetContextRef();
    if(!pContext) return;

    device = pContext->Device;
    if(!plValue1 || !plValue2 || !plValue3)
        alSetError(pContext, AL_INVALID_VALUE);
    else if(LookupBuffer(device->BufferMap, buffer) == NULL)
        alSetError(pContext, AL_INVALID_NAME);
    else
    {
        switch(eParam)
        {
        default:
            alSetError(pContext, AL_INVALID_ENUM);
            break;
        }
    }

    ALCcontext_DecRef(pContext);
}


AL_API void AL_APIENTRY alGetBufferiv(ALuint buffer, ALenum eParam, ALint* plValues)
{
    ALCcontext    *pContext;
    ALCdevice     *device;
    ALbuffer      *ALBuf;

    switch(eParam)
    {
    case AL_FREQUENCY:
    case AL_BITS:
    case AL_CHANNELS:
    case AL_SIZE:
        alGetBufferi(buffer, eParam, plValues);
        return;
    }

    pContext = GetContextRef();
    if(!pContext) return;

    device = pContext->Device;
    if(!plValues)
        alSetError(pContext, AL_INVALID_VALUE);
    else if((ALBuf=LookupBuffer(device->BufferMap, buffer)) == NULL)
        alSetError(pContext, AL_INVALID_NAME);
    else
    {
        switch(eParam)
        {
        case AL_LOOP_POINTS_SOFT:
            ReadLock(&ALBuf->lock);
            plValues[0] = ALBuf->LoopStart;
            plValues[1] = ALBuf->LoopEnd;
            ReadUnlock(&ALBuf->lock);
            break;

        default:
            alSetError(pContext, AL_INVALID_ENUM);
            break;
        }
    }

    ALCcontext_DecRef(pContext);
}


typedef ALubyte ALmulaw;
typedef ALubyte ALima4;
typedef struct {
    ALbyte b[3];
} ALbyte3;
typedef struct {
    ALubyte b[3];
} ALubyte3;

static __inline ALshort DecodeMuLaw(ALmulaw val)
{ return muLawDecompressionTable[val]; }

static ALmulaw EncodeMuLaw(ALshort val)
{
    ALint mant, exp, sign;

    sign = (val>>8) & 0x80;
    if(sign)
    {
        /* -32768 doesn't properly negate on a short; it results in itself.
         * So clamp to -32767 */
        val = maxi(val, -32767);
        val = -val;
    }

    val = mini(val, muLawClip);
    val += muLawBias;

    exp = muLawCompressTable[(val>>7) & 0xff];
    mant = (val >> (exp+3)) & 0x0f;

    return ~(sign | (exp<<4) | mant);
}

static void DecodeIMA4Block(ALshort *dst, const ALima4 *src, ALint numchans)
{
    ALint sample[MAXCHANNELS], index[MAXCHANNELS];
    ALuint code[MAXCHANNELS];
    ALsizei j,k,c;

    for(c = 0;c < numchans;c++)
    {
        sample[c]  = *(src++);
        sample[c] |= *(src++) << 8;
        sample[c]  = (sample[c]^0x8000) - 32768;
        index[c]  = *(src++);
        index[c] |= *(src++) << 8;
        index[c]  = (index[c]^0x8000) - 32768;

        index[c] = clampi(index[c], 0, 88);

        dst[c] = sample[c];
    }

    j = 1;
    while(j < 65)
    {
        for(c = 0;c < numchans;c++)
        {
            code[c]  = *(src++);
            code[c] |= *(src++) << 8;
            code[c] |= *(src++) << 16;
            code[c] |= *(src++) << 24;
        }

        for(k = 0;k < 8;k++,j++)
        {
            for(c = 0;c < numchans;c++)
            {
                int nibble = code[c]&0xf;
                code[c] >>= 4;

                sample[c] += IMA4Codeword[nibble] * IMAStep_size[index[c]] / 8;
                sample[c] = clampi(sample[c], -32768, 32767);

                index[c] += IMA4Index_adjust[nibble];
                index[c] = clampi(index[c], 0, 88);

                dst[j*numchans + c] = sample[c];
            }
        }
    }
}

static void EncodeIMA4Block(ALima4 *dst, const ALshort *src, ALint *sample, ALint *index, ALint numchans)
{
    ALsizei j,k,c;

    for(c = 0;c < numchans;c++)
    {
        int diff = src[c] - sample[c];
        int step = IMAStep_size[index[c]];
        int nibble;

        nibble = 0;
        if(diff < 0)
        {
            nibble = 0x8;
            diff = -diff;
        }

        diff = mini(step*2, diff);
        nibble |= (diff*8/step - 1) / 2;

        sample[c] += IMA4Codeword[nibble] * step / 8;
        sample[c] = clampi(sample[c], -32768, 32767);

        index[c] += IMA4Index_adjust[nibble];
        index[c] = clampi(index[c], 0, 88);

        *(dst++) = sample[c] & 0xff;
        *(dst++) = (sample[c]>>8) & 0xff;
        *(dst++) = index[c] & 0xff;
        *(dst++) = (index[c]>>8) & 0xff;
    }

    j = 1;
    while(j < 65)
    {
        for(c = 0;c < numchans;c++)
        {
            for(k = 0;k < 8;k++)
            {
                int diff = src[(j+k)*numchans + c] - sample[c];
                int step = IMAStep_size[index[c]];
                int nibble;

                nibble = 0;
                if(diff < 0)
                {
                    nibble = 0x8;
                    diff = -diff;
                }

                diff = mini(step*2, diff);
                nibble |= (diff*8/step - 1) / 2;

                sample[c] += IMA4Codeword[nibble] * step / 8;
                sample[c] = clampi(sample[c], -32768, 32767);

                index[c] += IMA4Index_adjust[nibble];
                index[c] = clampi(index[c], 0, 88);

                if(!(k&1)) *dst = nibble;
                else *(dst++) |= nibble<<4;
            }
        }
        j += 8;
    }
}

static const union {
    ALuint u;
    ALubyte b[sizeof(ALuint)];
} EndianTest = { 1 };
#define IS_LITTLE_ENDIAN (EndianTest.b[0] == 1)

static __inline ALint DecodeByte3(ALbyte3 val)
{
    if(IS_LITTLE_ENDIAN)
        return (val.b[2]<<16) | (((ALubyte)val.b[1])<<8) | ((ALubyte)val.b[0]);
    return (val.b[0]<<16) | (((ALubyte)val.b[1])<<8) | ((ALubyte)val.b[2]);
}

static __inline ALbyte3 EncodeByte3(ALint val)
{
    if(IS_LITTLE_ENDIAN)
    {
        ALbyte3 ret = {{ val, val>>8, val>>16 }};
        return ret;
    }
    else
    {
        ALbyte3 ret = {{ val>>16, val>>8, val }};
        return ret;
    }
}

static __inline ALint DecodeUByte3(ALubyte3 val)
{
    if(IS_LITTLE_ENDIAN)
        return (val.b[2]<<16) | (val.b[1]<<8) | (val.b[0]);
    return (val.b[0]<<16) | (val.b[1]<<8) | val.b[2];
}

static __inline ALubyte3 EncodeUByte3(ALint val)
{
    if(IS_LITTLE_ENDIAN)
    {
        ALubyte3 ret = {{ val, val>>8, val>>16 }};
        return ret;
    }
    else
    {
        ALubyte3 ret = {{ val>>16, val>>8, val }};
        return ret;
    }
}


static __inline ALbyte Conv_ALbyte_ALbyte(ALbyte val)
{ return val; }
static __inline ALbyte Conv_ALbyte_ALubyte(ALubyte val)
{ return val-128; }
static __inline ALbyte Conv_ALbyte_ALshort(ALshort val)
{ return val>>8; }
static __inline ALbyte Conv_ALbyte_ALushort(ALushort val)
{ return (val>>8)-128; }
static __inline ALbyte Conv_ALbyte_ALint(ALint val)
{ return val>>24; }
static __inline ALbyte Conv_ALbyte_ALuint(ALuint val)
{ return (val>>24)-128; }
static __inline ALbyte Conv_ALbyte_ALfloat(ALfloat val)
{
    if(val > 1.0f) return 127;
    if(val < -1.0f) return -128;
    return (ALint)(val * 127.0f);
}
static __inline ALbyte Conv_ALbyte_ALdouble(ALdouble val)
{
    if(val > 1.0) return 127;
    if(val < -1.0) return -128;
    return (ALint)(val * 127.0);
}
static __inline ALbyte Conv_ALbyte_ALmulaw(ALmulaw val)
{ return Conv_ALbyte_ALshort(DecodeMuLaw(val)); }
static __inline ALbyte Conv_ALbyte_ALbyte3(ALbyte3 val)
{ return DecodeByte3(val)>>16; }
static __inline ALbyte Conv_ALbyte_ALubyte3(ALubyte3 val)
{ return (DecodeUByte3(val)>>16)-128; }

static __inline ALubyte Conv_ALubyte_ALbyte(ALbyte val)
{ return val+128; }
static __inline ALubyte Conv_ALubyte_ALubyte(ALubyte val)
{ return val; }
static __inline ALubyte Conv_ALubyte_ALshort(ALshort val)
{ return (val>>8)+128; }
static __inline ALubyte Conv_ALubyte_ALushort(ALushort val)
{ return val>>8; }
static __inline ALubyte Conv_ALubyte_ALint(ALint val)
{ return (val>>24)+128; }
static __inline ALubyte Conv_ALubyte_ALuint(ALuint val)
{ return val>>24; }
static __inline ALubyte Conv_ALubyte_ALfloat(ALfloat val)
{
    if(val > 1.0f) return 255;
    if(val < -1.0f) return 0;
    return (ALint)(val * 127.0f) + 128;
}
static __inline ALubyte Conv_ALubyte_ALdouble(ALdouble val)
{
    if(val > 1.0) return 255;
    if(val < -1.0) return 0;
    return (ALint)(val * 127.0) + 128;
}
static __inline ALubyte Conv_ALubyte_ALmulaw(ALmulaw val)
{ return Conv_ALubyte_ALshort(DecodeMuLaw(val)); }
static __inline ALubyte Conv_ALubyte_ALbyte3(ALbyte3 val)
{ return (DecodeByte3(val)>>16)+128; }
static __inline ALubyte Conv_ALubyte_ALubyte3(ALubyte3 val)
{ return DecodeUByte3(val)>>16; }

static __inline ALshort Conv_ALshort_ALbyte(ALbyte val)
{ return val<<8; }
static __inline ALshort Conv_ALshort_ALubyte(ALubyte val)
{ return (val-128)<<8; }
static __inline ALshort Conv_ALshort_ALshort(ALshort val)
{ return val; }
static __inline ALshort Conv_ALshort_ALushort(ALushort val)
{ return val-32768; }
static __inline ALshort Conv_ALshort_ALint(ALint val)
{ return val>>16; }
static __inline ALshort Conv_ALshort_ALuint(ALuint val)
{ return (val>>16)-32768; }
static __inline ALshort Conv_ALshort_ALfloat(ALfloat val)
{
    if(val > 1.0f) return 32767;
    if(val < -1.0f) return -32768;
    return (ALint)(val * 32767.0f);
}
static __inline ALshort Conv_ALshort_ALdouble(ALdouble val)
{
    if(val > 1.0) return 32767;
    if(val < -1.0) return -32768;
    return (ALint)(val * 32767.0);
}
static __inline ALshort Conv_ALshort_ALmulaw(ALmulaw val)
{ return Conv_ALshort_ALshort(DecodeMuLaw(val)); }
static __inline ALshort Conv_ALshort_ALbyte3(ALbyte3 val)
{ return DecodeByte3(val)>>8; }
static __inline ALshort Conv_ALshort_ALubyte3(ALubyte3 val)
{ return (DecodeUByte3(val)>>8)-32768; }

static __inline ALushort Conv_ALushort_ALbyte(ALbyte val)
{ return (val+128)<<8; }
static __inline ALushort Conv_ALushort_ALubyte(ALubyte val)
{ return val<<8; }
static __inline ALushort Conv_ALushort_ALshort(ALshort val)
{ return val+32768; }
static __inline ALushort Conv_ALushort_ALushort(ALushort val)
{ return val; }
static __inline ALushort Conv_ALushort_ALint(ALint val)
{ return (val>>16)+32768; }
static __inline ALushort Conv_ALushort_ALuint(ALuint val)
{ return val>>16; }
static __inline ALushort Conv_ALushort_ALfloat(ALfloat val)
{
    if(val > 1.0f) return 65535;
    if(val < -1.0f) return 0;
    return (ALint)(val * 32767.0f) + 32768;
}
static __inline ALushort Conv_ALushort_ALdouble(ALdouble val)
{
    if(val > 1.0) return 65535;
    if(val < -1.0) return 0;
    return (ALint)(val * 32767.0) + 32768;
}
static __inline ALushort Conv_ALushort_ALmulaw(ALmulaw val)
{ return Conv_ALushort_ALshort(DecodeMuLaw(val)); }
static __inline ALushort Conv_ALushort_ALbyte3(ALbyte3 val)
{ return (DecodeByte3(val)>>8)+32768; }
static __inline ALushort Conv_ALushort_ALubyte3(ALubyte3 val)
{ return DecodeUByte3(val)>>8; }

static __inline ALint Conv_ALint_ALbyte(ALbyte val)
{ return val<<24; }
static __inline ALint Conv_ALint_ALubyte(ALubyte val)
{ return (val-128)<<24; }
static __inline ALint Conv_ALint_ALshort(ALshort val)
{ return val<<16; }
static __inline ALint Conv_ALint_ALushort(ALushort val)
{ return (val-32768)<<16; }
static __inline ALint Conv_ALint_ALint(ALint val)
{ return val; }
static __inline ALint Conv_ALint_ALuint(ALuint val)
{ return val-2147483648u; }
static __inline ALint Conv_ALint_ALfloat(ALfloat val)
{
    if(val > 1.0f) return 2147483647;
    if(val < -1.0f) return -2147483647-1;
    return (ALint)(val * 2147483647.0);
}
static __inline ALint Conv_ALint_ALdouble(ALdouble val)
{
    if(val > 1.0) return 2147483647;
    if(val < -1.0) return -2147483647-1;
    return (ALint)(val * 2147483647.0);
}
static __inline ALint Conv_ALint_ALmulaw(ALmulaw val)
{ return Conv_ALint_ALshort(DecodeMuLaw(val)); }
static __inline ALint Conv_ALint_ALbyte3(ALbyte3 val)
{ return DecodeByte3(val)<<8; }
static __inline ALint Conv_ALint_ALubyte3(ALubyte3 val)
{ return (DecodeUByte3(val)-8388608)<<8; }

static __inline ALuint Conv_ALuint_ALbyte(ALbyte val)
{ return (val+128)<<24; }
static __inline ALuint Conv_ALuint_ALubyte(ALubyte val)
{ return val<<24; }
static __inline ALuint Conv_ALuint_ALshort(ALshort val)
{ return (val+32768)<<16; }
static __inline ALuint Conv_ALuint_ALushort(ALushort val)
{ return val<<16; }
static __inline ALuint Conv_ALuint_ALint(ALint val)
{ return val+2147483648u; }
static __inline ALuint Conv_ALuint_ALuint(ALuint val)
{ return val; }
static __inline ALuint Conv_ALuint_ALfloat(ALfloat val)
{
    if(val > 1.0f) return 4294967295u;
    if(val < -1.0f) return 0;
    return (ALint)(val * 2147483647.0) + 2147483648u;
}
static __inline ALuint Conv_ALuint_ALdouble(ALdouble val)
{
    if(val > 1.0) return 4294967295u;
    if(val < -1.0) return 0;
    return (ALint)(val * 2147483647.0) + 2147483648u;
}
static __inline ALuint Conv_ALuint_ALmulaw(ALmulaw val)
{ return Conv_ALuint_ALshort(DecodeMuLaw(val)); }
static __inline ALuint Conv_ALuint_ALbyte3(ALbyte3 val)
{ return (DecodeByte3(val)+8388608)<<8; }
static __inline ALuint Conv_ALuint_ALubyte3(ALubyte3 val)
{ return DecodeUByte3(val)<<8; }

static __inline ALfloat Conv_ALfloat_ALbyte(ALbyte val)
{ return val * (1.0f/127.0f); }
static __inline ALfloat Conv_ALfloat_ALubyte(ALubyte val)
{ return (val-128) * (1.0f/127.0f); }
static __inline ALfloat Conv_ALfloat_ALshort(ALshort val)
{ return val * (1.0f/32767.0f); }
static __inline ALfloat Conv_ALfloat_ALushort(ALushort val)
{ return (val-32768) * (1.0f/32767.0f); }
static __inline ALfloat Conv_ALfloat_ALint(ALint val)
{ return val * (1.0/2147483647.0); }
static __inline ALfloat Conv_ALfloat_ALuint(ALuint val)
{ return (ALint)(val-2147483648u) * (1.0/2147483647.0); }
static __inline ALfloat Conv_ALfloat_ALfloat(ALfloat val)
{ return (val==val) ? val : 0.0f; }
static __inline ALfloat Conv_ALfloat_ALdouble(ALdouble val)
{ return (val==val) ? val : 0.0; }
static __inline ALfloat Conv_ALfloat_ALmulaw(ALmulaw val)
{ return Conv_ALfloat_ALshort(DecodeMuLaw(val)); }
static __inline ALfloat Conv_ALfloat_ALbyte3(ALbyte3 val)
{ return DecodeByte3(val) * (1.0/8388607.0); }
static __inline ALfloat Conv_ALfloat_ALubyte3(ALubyte3 val)
{ return (DecodeUByte3(val)-8388608) * (1.0/8388607.0); }

static __inline ALdouble Conv_ALdouble_ALbyte(ALbyte val)
{ return val * (1.0/127.0); }
static __inline ALdouble Conv_ALdouble_ALubyte(ALubyte val)
{ return (val-128) * (1.0/127.0); }
static __inline ALdouble Conv_ALdouble_ALshort(ALshort val)
{ return val * (1.0/32767.0); }
static __inline ALdouble Conv_ALdouble_ALushort(ALushort val)
{ return (val-32768) * (1.0/32767.0); }
static __inline ALdouble Conv_ALdouble_ALint(ALint val)
{ return val * (1.0/2147483647.0); }
static __inline ALdouble Conv_ALdouble_ALuint(ALuint val)
{ return (ALint)(val-2147483648u) * (1.0/2147483647.0); }
static __inline ALdouble Conv_ALdouble_ALfloat(ALfloat val)
{ return (val==val) ? val : 0.0f; }
static __inline ALdouble Conv_ALdouble_ALdouble(ALdouble val)
{ return (val==val) ? val : 0.0; }
static __inline ALdouble Conv_ALdouble_ALmulaw(ALmulaw val)
{ return Conv_ALdouble_ALshort(DecodeMuLaw(val)); }
static __inline ALdouble Conv_ALdouble_ALbyte3(ALbyte3 val)
{ return DecodeByte3(val) * (1.0/8388607.0); }
static __inline ALdouble Conv_ALdouble_ALubyte3(ALubyte3 val)
{ return (DecodeUByte3(val)-8388608) * (1.0/8388607.0); }

#define DECL_TEMPLATE(T)                                                      \
static __inline ALmulaw Conv_ALmulaw_##T(T val)                               \
{ return EncodeMuLaw(Conv_ALshort_##T(val)); }

DECL_TEMPLATE(ALbyte)
DECL_TEMPLATE(ALubyte)
DECL_TEMPLATE(ALshort)
DECL_TEMPLATE(ALushort)
DECL_TEMPLATE(ALint)
DECL_TEMPLATE(ALuint)
DECL_TEMPLATE(ALfloat)
DECL_TEMPLATE(ALdouble)
static __inline ALmulaw Conv_ALmulaw_ALmulaw(ALmulaw val)
{ return val; }
DECL_TEMPLATE(ALbyte3)
DECL_TEMPLATE(ALubyte3)

#undef DECL_TEMPLATE

#define DECL_TEMPLATE(T)                                                      \
static __inline ALbyte3 Conv_ALbyte3_##T(T val)                               \
{ return EncodeByte3(Conv_ALint_##T(val)>>8); }

DECL_TEMPLATE(ALbyte)
DECL_TEMPLATE(ALubyte)
DECL_TEMPLATE(ALshort)
DECL_TEMPLATE(ALushort)
DECL_TEMPLATE(ALint)
DECL_TEMPLATE(ALuint)
DECL_TEMPLATE(ALfloat)
DECL_TEMPLATE(ALdouble)
DECL_TEMPLATE(ALmulaw)
static __inline ALbyte3 Conv_ALbyte3_ALbyte3(ALbyte3 val)
{ return val; }
DECL_TEMPLATE(ALubyte3)

#undef DECL_TEMPLATE

#define DECL_TEMPLATE(T)                                                      \
static __inline ALubyte3 Conv_ALubyte3_##T(T val)                             \
{ return EncodeUByte3(Conv_ALuint_##T(val)>>8); }

DECL_TEMPLATE(ALbyte)
DECL_TEMPLATE(ALubyte)
DECL_TEMPLATE(ALshort)
DECL_TEMPLATE(ALushort)
DECL_TEMPLATE(ALint)
DECL_TEMPLATE(ALuint)
DECL_TEMPLATE(ALfloat)
DECL_TEMPLATE(ALdouble)
DECL_TEMPLATE(ALmulaw)
DECL_TEMPLATE(ALbyte3)
static __inline ALubyte3 Conv_ALubyte3_ALubyte3(ALubyte3 val)
{ return val; }

#undef DECL_TEMPLATE


#define DECL_TEMPLATE(T1, T2)                                                 \
static void Convert_##T1##_##T2(T1 *dst, const T2 *src, ALuint numchans,      \
                                ALuint len)                                   \
{                                                                             \
    ALuint i, j;                                                              \
    for(i = 0;i < len;i++)                                                    \
    {                                                                         \
        for(j = 0;j < numchans;j++)                                           \
            *(dst++) = Conv_##T1##_##T2(*(src++));                            \
    }                                                                         \
}

DECL_TEMPLATE(ALbyte, ALbyte)
DECL_TEMPLATE(ALbyte, ALubyte)
DECL_TEMPLATE(ALbyte, ALshort)
DECL_TEMPLATE(ALbyte, ALushort)
DECL_TEMPLATE(ALbyte, ALint)
DECL_TEMPLATE(ALbyte, ALuint)
DECL_TEMPLATE(ALbyte, ALfloat)
DECL_TEMPLATE(ALbyte, ALdouble)
DECL_TEMPLATE(ALbyte, ALmulaw)
DECL_TEMPLATE(ALbyte, ALbyte3)
DECL_TEMPLATE(ALbyte, ALubyte3)

DECL_TEMPLATE(ALubyte, ALbyte)
DECL_TEMPLATE(ALubyte, ALubyte)
DECL_TEMPLATE(ALubyte, ALshort)
DECL_TEMPLATE(ALubyte, ALushort)
DECL_TEMPLATE(ALubyte, ALint)
DECL_TEMPLATE(ALubyte, ALuint)
DECL_TEMPLATE(ALubyte, ALfloat)
DECL_TEMPLATE(ALubyte, ALdouble)
DECL_TEMPLATE(ALubyte, ALmulaw)
DECL_TEMPLATE(ALubyte, ALbyte3)
DECL_TEMPLATE(ALubyte, ALubyte3)

DECL_TEMPLATE(ALshort, ALbyte)
DECL_TEMPLATE(ALshort, ALubyte)
DECL_TEMPLATE(ALshort, ALshort)
DECL_TEMPLATE(ALshort, ALushort)
DECL_TEMPLATE(ALshort, ALint)
DECL_TEMPLATE(ALshort, ALuint)
DECL_TEMPLATE(ALshort, ALfloat)
DECL_TEMPLATE(ALshort, ALdouble)
DECL_TEMPLATE(ALshort, ALmulaw)
DECL_TEMPLATE(ALshort, ALbyte3)
DECL_TEMPLATE(ALshort, ALubyte3)

DECL_TEMPLATE(ALushort, ALbyte)
DECL_TEMPLATE(ALushort, ALubyte)
DECL_TEMPLATE(ALushort, ALshort)
DECL_TEMPLATE(ALushort, ALushort)
DECL_TEMPLATE(ALushort, ALint)
DECL_TEMPLATE(ALushort, ALuint)
DECL_TEMPLATE(ALushort, ALfloat)
DECL_TEMPLATE(ALushort, ALdouble)
DECL_TEMPLATE(ALushort, ALmulaw)
DECL_TEMPLATE(ALushort, ALbyte3)
DECL_TEMPLATE(ALushort, ALubyte3)

DECL_TEMPLATE(ALint, ALbyte)
DECL_TEMPLATE(ALint, ALubyte)
DECL_TEMPLATE(ALint, ALshort)
DECL_TEMPLATE(ALint, ALushort)
DECL_TEMPLATE(ALint, ALint)
DECL_TEMPLATE(ALint, ALuint)
DECL_TEMPLATE(ALint, ALfloat)
DECL_TEMPLATE(ALint, ALdouble)
DECL_TEMPLATE(ALint, ALmulaw)
DECL_TEMPLATE(ALint, ALbyte3)
DECL_TEMPLATE(ALint, ALubyte3)

DECL_TEMPLATE(ALuint, ALbyte)
DECL_TEMPLATE(ALuint, ALubyte)
DECL_TEMPLATE(ALuint, ALshort)
DECL_TEMPLATE(ALuint, ALushort)
DECL_TEMPLATE(ALuint, ALint)
DECL_TEMPLATE(ALuint, ALuint)
DECL_TEMPLATE(ALuint, ALfloat)
DECL_TEMPLATE(ALuint, ALdouble)
DECL_TEMPLATE(ALuint, ALmulaw)
DECL_TEMPLATE(ALuint, ALbyte3)
DECL_TEMPLATE(ALuint, ALubyte3)

DECL_TEMPLATE(ALfloat, ALbyte)
DECL_TEMPLATE(ALfloat, ALubyte)
DECL_TEMPLATE(ALfloat, ALshort)
DECL_TEMPLATE(ALfloat, ALushort)
DECL_TEMPLATE(ALfloat, ALint)
DECL_TEMPLATE(ALfloat, ALuint)
DECL_TEMPLATE(ALfloat, ALfloat)
DECL_TEMPLATE(ALfloat, ALdouble)
DECL_TEMPLATE(ALfloat, ALmulaw)
DECL_TEMPLATE(ALfloat, ALbyte3)
DECL_TEMPLATE(ALfloat, ALubyte3)

DECL_TEMPLATE(ALdouble, ALbyte)
DECL_TEMPLATE(ALdouble, ALubyte)
DECL_TEMPLATE(ALdouble, ALshort)
DECL_TEMPLATE(ALdouble, ALushort)
DECL_TEMPLATE(ALdouble, ALint)
DECL_TEMPLATE(ALdouble, ALuint)
DECL_TEMPLATE(ALdouble, ALfloat)
DECL_TEMPLATE(ALdouble, ALdouble)
DECL_TEMPLATE(ALdouble, ALmulaw)
DECL_TEMPLATE(ALdouble, ALbyte3)
DECL_TEMPLATE(ALdouble, ALubyte3)

DECL_TEMPLATE(ALmulaw, ALbyte)
DECL_TEMPLATE(ALmulaw, ALubyte)
DECL_TEMPLATE(ALmulaw, ALshort)
DECL_TEMPLATE(ALmulaw, ALushort)
DECL_TEMPLATE(ALmulaw, ALint)
DECL_TEMPLATE(ALmulaw, ALuint)
DECL_TEMPLATE(ALmulaw, ALfloat)
DECL_TEMPLATE(ALmulaw, ALdouble)
DECL_TEMPLATE(ALmulaw, ALmulaw)
DECL_TEMPLATE(ALmulaw, ALbyte3)
DECL_TEMPLATE(ALmulaw, ALubyte3)

DECL_TEMPLATE(ALbyte3, ALbyte)
DECL_TEMPLATE(ALbyte3, ALubyte)
DECL_TEMPLATE(ALbyte3, ALshort)
DECL_TEMPLATE(ALbyte3, ALushort)
DECL_TEMPLATE(ALbyte3, ALint)
DECL_TEMPLATE(ALbyte3, ALuint)
DECL_TEMPLATE(ALbyte3, ALfloat)
DECL_TEMPLATE(ALbyte3, ALdouble)
DECL_TEMPLATE(ALbyte3, ALmulaw)
DECL_TEMPLATE(ALbyte3, ALbyte3)
DECL_TEMPLATE(ALbyte3, ALubyte3)

DECL_TEMPLATE(ALubyte3, ALbyte)
DECL_TEMPLATE(ALubyte3, ALubyte)
DECL_TEMPLATE(ALubyte3, ALshort)
DECL_TEMPLATE(ALubyte3, ALushort)
DECL_TEMPLATE(ALubyte3, ALint)
DECL_TEMPLATE(ALubyte3, ALuint)
DECL_TEMPLATE(ALubyte3, ALfloat)
DECL_TEMPLATE(ALubyte3, ALdouble)
DECL_TEMPLATE(ALubyte3, ALmulaw)
DECL_TEMPLATE(ALubyte3, ALbyte3)
DECL_TEMPLATE(ALubyte3, ALubyte3)

#undef DECL_TEMPLATE

#define DECL_TEMPLATE(T)                                                      \
static void Convert_##T##_ALima4(T *dst, const ALima4 *src, ALuint numchans,  \
                                 ALuint numblocks)                            \
{                                                                             \
    ALuint i, j;                                                              \
    ALshort tmp[65*MAXCHANNELS]; /* Max samples an IMA4 frame can be */       \
    for(i = 0;i < numblocks;i++)                                              \
    {                                                                         \
        DecodeIMA4Block(tmp, src, numchans);                                  \
        src += 36*numchans;                                                   \
        for(j = 0;j < 65*numchans;j++)                                        \
            *(dst++) = Conv_##T##_ALshort(tmp[j]);                            \
    }                                                                         \
}

DECL_TEMPLATE(ALbyte)
DECL_TEMPLATE(ALubyte)
DECL_TEMPLATE(ALshort)
DECL_TEMPLATE(ALushort)
DECL_TEMPLATE(ALint)
DECL_TEMPLATE(ALuint)
DECL_TEMPLATE(ALfloat)
DECL_TEMPLATE(ALdouble)
DECL_TEMPLATE(ALmulaw)
DECL_TEMPLATE(ALbyte3)
DECL_TEMPLATE(ALubyte3)

#undef DECL_TEMPLATE

#define DECL_TEMPLATE(T)                                                      \
static void Convert_ALima4_##T(ALima4 *dst, const T *src, ALuint numchans,    \
                               ALuint numblocks)                              \
{                                                                             \
    ALuint i, j;                                                              \
    ALshort tmp[65*MAXCHANNELS]; /* Max samples an IMA4 frame can be */       \
    ALint sample[MAXCHANNELS] = {0,0,0,0,0,0,0,0};                            \
    ALint index[MAXCHANNELS] = {0,0,0,0,0,0,0,0};                             \
    for(i = 0;i < numblocks;i++)                                              \
    {                                                                         \
        for(j = 0;j < 65*numchans;j++)                                        \
            tmp[j] = Conv_ALshort_##T(*(src++));                              \
        EncodeIMA4Block(dst, tmp, sample, index, numchans);                   \
        dst += 36*numchans;                                                   \
    }                                                                         \
}

DECL_TEMPLATE(ALbyte)
DECL_TEMPLATE(ALubyte)
DECL_TEMPLATE(ALshort)
DECL_TEMPLATE(ALushort)
DECL_TEMPLATE(ALint)
DECL_TEMPLATE(ALuint)
DECL_TEMPLATE(ALfloat)
DECL_TEMPLATE(ALdouble)
DECL_TEMPLATE(ALmulaw)
static void Convert_ALima4_ALima4(ALima4 *dst, const ALima4 *src,
                                  ALuint numchans, ALuint numblocks)
{ memcpy(dst, src, numblocks*36*numchans); }
DECL_TEMPLATE(ALbyte3)
DECL_TEMPLATE(ALubyte3)

#undef DECL_TEMPLATE

#define DECL_TEMPLATE(T)                                                      \
static void Convert_##T(T *dst, const ALvoid *src, enum UserFmtType srcType,  \
                        ALsizei numchans, ALsizei len)                        \
{                                                                             \
    switch(srcType)                                                           \
    {                                                                         \
        case UserFmtByte:                                                     \
            Convert_##T##_ALbyte(dst, src, numchans, len);                    \
            break;                                                            \
        case UserFmtUByte:                                                    \
            Convert_##T##_ALubyte(dst, src, numchans, len);                   \
            break;                                                            \
        case UserFmtShort:                                                    \
            Convert_##T##_ALshort(dst, src, numchans, len);                   \
            break;                                                            \
        case UserFmtUShort:                                                   \
            Convert_##T##_ALushort(dst, src, numchans, len);                  \
            break;                                                            \
        case UserFmtInt:                                                      \
            Convert_##T##_ALint(dst, src, numchans, len);                     \
            break;                                                            \
        case UserFmtUInt:                                                     \
            Convert_##T##_ALuint(dst, src, numchans, len);                    \
            break;                                                            \
        case UserFmtFloat:                                                    \
            Convert_##T##_ALfloat(dst, src, numchans, len);                   \
            break;                                                            \
        case UserFmtDouble:                                                   \
            Convert_##T##_ALdouble(dst, src, numchans, len);                  \
            break;                                                            \
        case UserFmtMulaw:                                                    \
            Convert_##T##_ALmulaw(dst, src, numchans, len);                   \
            break;                                                            \
        case UserFmtIMA4:                                                     \
            Convert_##T##_ALima4(dst, src, numchans, len);                    \
            break;                                                            \
        case UserFmtByte3:                                                    \
            Convert_##T##_ALbyte3(dst, src, numchans, len);                   \
            break;                                                            \
        case UserFmtUByte3:                                                   \
            Convert_##T##_ALubyte3(dst, src, numchans, len);                  \
            break;                                                            \
    }                                                                         \
}

DECL_TEMPLATE(ALbyte)
DECL_TEMPLATE(ALubyte)
DECL_TEMPLATE(ALshort)
DECL_TEMPLATE(ALushort)
DECL_TEMPLATE(ALint)
DECL_TEMPLATE(ALuint)
DECL_TEMPLATE(ALfloat)
DECL_TEMPLATE(ALdouble)
DECL_TEMPLATE(ALmulaw)
DECL_TEMPLATE(ALima4)
DECL_TEMPLATE(ALbyte3)
DECL_TEMPLATE(ALubyte3)

#undef DECL_TEMPLATE


static void ConvertData(ALvoid *dst, enum UserFmtType dstType, const ALvoid *src, enum UserFmtType srcType, ALsizei numchans, ALsizei len)
{
    switch(dstType)
    {
        case UserFmtByte:
            Convert_ALbyte(dst, src, srcType, numchans, len);
            break;
        case UserFmtUByte:
            Convert_ALubyte(dst, src, srcType, numchans, len);
            break;
        case UserFmtShort:
            Convert_ALshort(dst, src, srcType, numchans, len);
            break;
        case UserFmtUShort:
            Convert_ALushort(dst, src, srcType, numchans, len);
            break;
        case UserFmtInt:
            Convert_ALint(dst, src, srcType, numchans, len);
            break;
        case UserFmtUInt:
            Convert_ALuint(dst, src, srcType, numchans, len);
            break;
        case UserFmtFloat:
            Convert_ALfloat(dst, src, srcType, numchans, len);
            break;
        case UserFmtDouble:
            Convert_ALdouble(dst, src, srcType, numchans, len);
            break;
        case UserFmtMulaw:
            Convert_ALmulaw(dst, src, srcType, numchans, len);
            break;
        case UserFmtIMA4:
            Convert_ALima4(dst, src, srcType, numchans, len);
            break;
        case UserFmtByte3:
            Convert_ALbyte3(dst, src, srcType, numchans, len);
            break;
        case UserFmtUByte3:
            Convert_ALubyte3(dst, src, srcType, numchans, len);
            break;
    }
}


/*
 * LoadData
 *
 * Loads the specified data into the buffer, using the specified formats.
 * Currently, the new format must have the same channel configuration as the
 * original format.
 */
static ALenum LoadData(ALbuffer *ALBuf, ALuint freq, ALenum NewFormat, ALsizei frames, enum UserFmtChannels SrcChannels, enum UserFmtType SrcType, const ALvoid *data, ALboolean storesrc)
{
    ALuint NewChannels, NewBytes;
    enum FmtChannels DstChannels;
    enum FmtType DstType;
    ALuint64 newsize;
    ALvoid *temp;

    WriteLock(&ALBuf->lock);
    if(ALBuf->ref != 0)
    {
        WriteUnlock(&ALBuf->lock);
        return AL_INVALID_OPERATION;
    }

    if(DecomposeFormat(NewFormat, &DstChannels, &DstType) == AL_FALSE ||
       (long)SrcChannels != (long)DstChannels)
    {
        WriteUnlock(&ALBuf->lock);
        return AL_INVALID_ENUM;
    }

    NewChannels = ChannelsFromFmt(DstChannels);
    NewBytes = BytesFromFmt(DstType);

    if(SrcType == UserFmtIMA4)
    {
        ALuint OrigChannels = ChannelsFromUserFmt(SrcChannels);

        newsize = frames;
        newsize *= 65;
        newsize *= NewBytes;
        newsize *= NewChannels;
        if(newsize > INT_MAX)
        {
            WriteUnlock(&ALBuf->lock);
            return AL_OUT_OF_MEMORY;
        }

        temp = realloc(ALBuf->data, newsize);
        if(!temp && newsize)
        {
            WriteUnlock(&ALBuf->lock);
            return AL_OUT_OF_MEMORY;
        }
        ALBuf->data = temp;
        ALBuf->size = newsize;

        if(data != NULL)
            ConvertData(ALBuf->data, DstType, data, SrcType, NewChannels, frames);

        if(storesrc)
        {
            ALBuf->OriginalChannels = SrcChannels;
            ALBuf->OriginalType     = SrcType;
            ALBuf->OriginalSize     = frames * 36 * OrigChannels;
            ALBuf->OriginalAlign    = 36 * OrigChannels;
        }
    }
    else
    {
        ALuint OrigBytes = BytesFromUserFmt(SrcType);
        ALuint OrigChannels = ChannelsFromUserFmt(SrcChannels);

        newsize = frames;
        newsize *= NewBytes;
        newsize *= NewChannels;
        if(newsize > INT_MAX)
        {
            WriteUnlock(&ALBuf->lock);
            return AL_OUT_OF_MEMORY;
        }

        temp = realloc(ALBuf->data, newsize);
        if(!temp && newsize)
        {
            WriteUnlock(&ALBuf->lock);
            return AL_OUT_OF_MEMORY;
        }
        ALBuf->data = temp;
        ALBuf->size = newsize;

        if(data != NULL)
            ConvertData(ALBuf->data, DstType, data, SrcType, NewChannels, frames);

        if(storesrc)
        {
            ALBuf->OriginalChannels = SrcChannels;
            ALBuf->OriginalType     = SrcType;
            ALBuf->OriginalSize     = frames * OrigBytes * OrigChannels;
            ALBuf->OriginalAlign    = OrigBytes * OrigChannels;
        }
    }

    if(!storesrc)
    {
        ALBuf->OriginalChannels = DstChannels;
        ALBuf->OriginalType     = DstType;
        ALBuf->OriginalSize     = frames * NewBytes * NewChannels;
        ALBuf->OriginalAlign    = NewBytes * NewChannels;
    }
    ALBuf->Frequency = freq;
    ALBuf->FmtChannels = DstChannels;
    ALBuf->FmtType = DstType;

    ALBuf->LoopStart = 0;
    ALBuf->LoopEnd = newsize / NewChannels / NewBytes;

    WriteUnlock(&ALBuf->lock);
    return AL_NO_ERROR;
}


ALuint BytesFromUserFmt(enum UserFmtType type)
{
    switch(type)
    {
    case UserFmtByte: return sizeof(ALbyte);
    case UserFmtUByte: return sizeof(ALubyte);
    case UserFmtShort: return sizeof(ALshort);
    case UserFmtUShort: return sizeof(ALushort);
    case UserFmtInt: return sizeof(ALint);
    case UserFmtUInt: return sizeof(ALuint);
    case UserFmtFloat: return sizeof(ALfloat);
    case UserFmtDouble: return sizeof(ALdouble);
    case UserFmtByte3: return sizeof(ALbyte3);
    case UserFmtUByte3: return sizeof(ALubyte3);
    case UserFmtMulaw: return sizeof(ALubyte);
    case UserFmtIMA4: break; /* not handled here */
    }
    return 0;
}
ALuint ChannelsFromUserFmt(enum UserFmtChannels chans)
{
    switch(chans)
    {
    case UserFmtMono: return 1;
    case UserFmtStereo: return 2;
    case UserFmtRear: return 2;
    case UserFmtQuad: return 4;
    case UserFmtX51: return 6;
    case UserFmtX61: return 7;
    case UserFmtX71: return 8;
    }
    return 0;
}
ALboolean DecomposeUserFormat(ALenum format, enum UserFmtChannels *chans,
                              enum UserFmtType *type)
{
    switch(format)
    {
        case AL_FORMAT_MONO8:
            *chans = UserFmtMono;
            *type  = UserFmtUByte;
            return AL_TRUE;
        case AL_FORMAT_MONO16:
            *chans = UserFmtMono;
            *type  = UserFmtShort;
            return AL_TRUE;
        case AL_FORMAT_MONO_FLOAT32:
            *chans = UserFmtMono;
            *type  = UserFmtFloat;
            return AL_TRUE;
        case AL_FORMAT_MONO_DOUBLE_EXT:
            *chans = UserFmtMono;
            *type  = UserFmtDouble;
            return AL_TRUE;
        case AL_FORMAT_MONO_IMA4:
            *chans = UserFmtMono;
            *type  = UserFmtIMA4;
            return AL_TRUE;
        case AL_FORMAT_STEREO8:
            *chans = UserFmtStereo;
            *type  = UserFmtUByte;
            return AL_TRUE;
        case AL_FORMAT_STEREO16:
            *chans = UserFmtStereo;
            *type  = UserFmtShort;
            return AL_TRUE;
        case AL_FORMAT_STEREO_FLOAT32:
            *chans = UserFmtStereo;
            *type  = UserFmtFloat;
            return AL_TRUE;
        case AL_FORMAT_STEREO_DOUBLE_EXT:
            *chans = UserFmtStereo;
            *type  = UserFmtDouble;
            return AL_TRUE;
        case AL_FORMAT_STEREO_IMA4:
            *chans = UserFmtStereo;
            *type  = UserFmtIMA4;
            return AL_TRUE;
        case AL_FORMAT_QUAD8_LOKI:
        case AL_FORMAT_QUAD8:
            *chans = UserFmtQuad;
            *type  = UserFmtUByte;
            return AL_TRUE;
        case AL_FORMAT_QUAD16_LOKI:
        case AL_FORMAT_QUAD16:
            *chans = UserFmtQuad;
            *type  = UserFmtShort;
            return AL_TRUE;
        case AL_FORMAT_QUAD32:
            *chans = UserFmtQuad;
            *type  = UserFmtFloat;
            return AL_TRUE;
        case AL_FORMAT_REAR8:
            *chans = UserFmtRear;
            *type  = UserFmtUByte;
            return AL_TRUE;
        case AL_FORMAT_REAR16:
            *chans = UserFmtRear;
            *type  = UserFmtShort;
            return AL_TRUE;
        case AL_FORMAT_REAR32:
            *chans = UserFmtRear;
            *type  = UserFmtFloat;
            return AL_TRUE;
        case AL_FORMAT_51CHN8:
            *chans = UserFmtX51;
            *type  = UserFmtUByte;
            return AL_TRUE;
        case AL_FORMAT_51CHN16:
            *chans = UserFmtX51;
            *type  = UserFmtShort;
            return AL_TRUE;
        case AL_FORMAT_51CHN32:
            *chans = UserFmtX51;
            *type  = UserFmtFloat;
            return AL_TRUE;
        case AL_FORMAT_61CHN8:
            *chans = UserFmtX61;
            *type  = UserFmtUByte;
            return AL_TRUE;
        case AL_FORMAT_61CHN16:
            *chans = UserFmtX61;
            *type  = UserFmtShort;
            return AL_TRUE;
        case AL_FORMAT_61CHN32:
            *chans = UserFmtX61;
            *type  = UserFmtFloat;
            return AL_TRUE;
        case AL_FORMAT_71CHN8:
            *chans = UserFmtX71;
            *type  = UserFmtUByte;
            return AL_TRUE;
        case AL_FORMAT_71CHN16:
            *chans = UserFmtX71;
            *type  = UserFmtShort;
            return AL_TRUE;
        case AL_FORMAT_71CHN32:
            *chans = UserFmtX71;
            *type  = UserFmtFloat;
            return AL_TRUE;
        case AL_FORMAT_MONO_MULAW:
            *chans = UserFmtMono;
            *type  = UserFmtMulaw;
            return AL_TRUE;
        case AL_FORMAT_STEREO_MULAW:
            *chans = UserFmtStereo;
            *type  = UserFmtMulaw;
            return AL_TRUE;
        case AL_FORMAT_QUAD_MULAW:
            *chans = UserFmtQuad;
            *type  = UserFmtMulaw;
            return AL_TRUE;
        case AL_FORMAT_REAR_MULAW:
            *chans = UserFmtRear;
            *type  = UserFmtMulaw;
            return AL_TRUE;
        case AL_FORMAT_51CHN_MULAW:
            *chans = UserFmtX51;
            *type  = UserFmtMulaw;
            return AL_TRUE;
        case AL_FORMAT_61CHN_MULAW:
            *chans = UserFmtX61;
            *type  = UserFmtMulaw;
            return AL_TRUE;
        case AL_FORMAT_71CHN_MULAW:
            *chans = UserFmtX71;
            *type  = UserFmtMulaw;
            return AL_TRUE;
    }
    return AL_FALSE;
}

ALuint BytesFromFmt(enum FmtType type)
{
    switch(type)
    {
    case FmtByte: return sizeof(ALbyte);
    case FmtShort: return sizeof(ALshort);
    case FmtFloat: return sizeof(ALfloat);
    }
    return 0;
}
ALuint ChannelsFromFmt(enum FmtChannels chans)
{
    switch(chans)
    {
    case FmtMono: return 1;
    case FmtStereo: return 2;
    case FmtRear: return 2;
    case FmtQuad: return 4;
    case FmtX51: return 6;
    case FmtX61: return 7;
    case FmtX71: return 8;
    }
    return 0;
}
ALboolean DecomposeFormat(ALenum format, enum FmtChannels *chans, enum FmtType *type)
{
    switch(format)
    {
        case AL_MONO8:
            *chans = FmtMono;
            *type  = FmtByte;
            return AL_TRUE;
        case AL_MONO16:
            *chans = FmtMono;
            *type  = FmtShort;
            return AL_TRUE;
        case AL_MONO32F:
            *chans = FmtMono;
            *type  = FmtFloat;
            return AL_TRUE;
        case AL_STEREO8:
            *chans = FmtStereo;
            *type  = FmtByte;
            return AL_TRUE;
        case AL_STEREO16:
            *chans = FmtStereo;
            *type  = FmtShort;
            return AL_TRUE;
        case AL_STEREO32F:
            *chans = FmtStereo;
            *type  = FmtFloat;
            return AL_TRUE;
        case AL_FORMAT_QUAD8_LOKI:
        case AL_QUAD8:
            *chans = FmtQuad;
            *type  = FmtByte;
            return AL_TRUE;
        case AL_FORMAT_QUAD16_LOKI:
        case AL_QUAD16:
            *chans = FmtQuad;
            *type  = FmtShort;
            return AL_TRUE;
        case AL_QUAD32F:
            *chans = FmtQuad;
            *type  = FmtFloat;
            return AL_TRUE;
        case AL_REAR8:
            *chans = FmtRear;
            *type  = FmtByte;
            return AL_TRUE;
        case AL_REAR16:
            *chans = FmtRear;
            *type  = FmtShort;
            return AL_TRUE;
        case AL_REAR32F:
            *chans = FmtRear;
            *type  = FmtFloat;
            return AL_TRUE;
        case AL_5POINT1_8:
            *chans = FmtX51;
            *type  = FmtByte;
            return AL_TRUE;
        case AL_5POINT1_16:
            *chans = FmtX51;
            *type  = FmtShort;
            return AL_TRUE;
        case AL_5POINT1_32F:
            *chans = FmtX51;
            *type  = FmtFloat;
            return AL_TRUE;
        case AL_6POINT1_8:
            *chans = FmtX61;
            *type  = FmtByte;
            return AL_TRUE;
        case AL_6POINT1_16:
            *chans = FmtX61;
            *type  = FmtShort;
            return AL_TRUE;
        case AL_6POINT1_32F:
            *chans = FmtX61;
            *type  = FmtFloat;
            return AL_TRUE;
        case AL_7POINT1_8:
            *chans = FmtX71;
            *type  = FmtByte;
            return AL_TRUE;
        case AL_7POINT1_16:
            *chans = FmtX71;
            *type  = FmtShort;
            return AL_TRUE;
        case AL_7POINT1_32F:
            *chans = FmtX71;
            *type  = FmtFloat;
            return AL_TRUE;
    }
    return AL_FALSE;
}


static ALboolean IsValidType(ALenum type)
{
    switch(type)
    {
        case AL_BYTE:
        case AL_UNSIGNED_BYTE:
        case AL_SHORT:
        case AL_UNSIGNED_SHORT:
        case AL_INT:
        case AL_UNSIGNED_INT:
        case AL_FLOAT:
        case AL_DOUBLE:
        case AL_MULAW:
        case AL_IMA4:
        case AL_BYTE3:
        case AL_UNSIGNED_BYTE3:
            return AL_TRUE;
    }
    return AL_FALSE;
}

static ALboolean IsValidChannels(ALenum channels)
{
    switch(channels)
    {
        case AL_MONO:
        case AL_STEREO:
        case AL_REAR:
        case AL_QUAD:
        case AL_5POINT1:
        case AL_6POINT1:
        case AL_7POINT1:
            return AL_TRUE;
    }
    return AL_FALSE;
}


/*
 *    ReleaseALBuffers()
 *
 *    INTERNAL: Called to destroy any buffers that still exist on the device
 */
ALvoid ReleaseALBuffers(ALCdevice *device)
{
    ALsizei i;
    for(i = 0;i < device->BufferMap.size;i++)
    {
        ALbuffer *temp = device->BufferMap.array[i].value;
        device->BufferMap.array[i].value = NULL;

        free(temp->data);

        FreeThunkEntry(temp->buffer);
        memset(temp, 0, sizeof(ALbuffer));
        free(temp);
    }
}