text: /**
   * 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);
  static ALboolean DecomposeUserFormat(ALenum format, enum UserFmtChannels *chans, enum UserFmtType *type);
  static ALboolean DecomposeFormat(ALenum format, enum FmtChannels *chans, enum FmtType *type);
  
  
  /*
   * 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
  };
  
  
  /* A quick'n'dirty lookup table to decode an aLaw-encoded byte sample into a
   * signed 16-bit sample */
  static const ALshort aLawDecompressionTable[256] = {
       -5504, -5248, -6016, -5760, -4480, -4224, -4992, -4736,
       -7552, -7296, -8064, -7808, -6528, -6272, -7040, -6784,
       -2752, -2624, -3008, -2880, -2240, -2112, -2496, -2368,
       -3776, -3648, -4032, -3904, -3264, -3136, -3520, -3392,
      -22016,-20992,-24064,-23040,-17920,-16896,-19968,-18944,
      -30208,-29184,-32256,-31232,-26112,-25088,-28160,-27136,
      -11008,-10496,-12032,-11520, -8960, -8448, -9984, -9472,
      -15104,-14592,-16128,-15616,-13056,-12544,-14080,-13568,
        -344,  -328,  -376,  -360,  -280,  -264,  -312,  -296,
        -472,  -456,  -504,  -488,  -408,  -392,  -440,  -424,
         -88,   -72,  -120,  -104,   -24,    -8,   -56,   -40,
        -216,  -200,  -248,  -232,  -152,  -136,  -184,  -168,
       -1376, -1312, -1504, -1440, -1120, -1056, -1248, -1184,
       -1888, -1824, -2016, -1952, -1632, -1568, -1760, -1696,
        -688,  -656,  -752,  -720,  -560,  -528,  -624,  -592,
        -944,  -912, -1008,  -976,  -816,  -784,  -880,  -848,
        5504,  5248,  6016,  5760,  4480,  4224,  4992,  4736,
        7552,  7296,  8064,  7808,  6528,  6272,  7040,  6784,
        2752,  2624,  3008,  2880,  2240,  2112,  2496,  2368,
        3776,  3648,  4032,  3904,  3264,  3136,  3520,  3392,
       22016, 20992, 24064, 23040, 17920, 16896, 19968, 18944,
       30208, 29184, 32256, 31232, 26112, 25088, 28160, 27136,
       11008, 10496, 12032, 11520,  8960,  8448,  9984,  9472,
       15104, 14592, 16128, 15616, 13056, 12544, 14080, 13568,
         344,   328,   376,   360,   280,   264,   312,   296,
         472,   456,   504,   488,   408,   392,   440,   424,
          88,    72,   120,   104,    24,     8,    56,    40,
         216,   200,   248,   232,   152,   136,   184,   168,
        1376,  1312,  1504,  1440,  1120,  1056,  1248,  1184,
        1888,  1824,  2016,  1952,  1632,  1568,  1760,  1696,
         688,   656,   752,   720,   560,   528,   624,   592,
         944,   912,  1008,   976,   816,   784,   880,   848
  };
  
  /* Values used when encoding an aLaw sample */
  static const int aLawClip = 32635;
  static const char aLawCompressTable[128] = {
      1,1,2,2,3,3,3,3,4,4,4,4,4,4,4,4,
      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,
      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, 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, 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, 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;
      ALuint FrameSize;
      ALenum NewFormat;
      ALbuffer *ALBuf;
      ALenum err;
  
      Context = GetContextRef();
      if(!Context) return;
  
      device = Context->Device;
      if((ALBuf=LookupBuffer(device, 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:
              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:
              FrameSize = FrameSizeFromUserFmt(SrcChannels, SrcType);
              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 UserFmtAlaw:
              FrameSize = FrameSizeFromUserFmt(SrcChannels, SrcType);
              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;
  
          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 = ChannelsFromUserFmt(SrcChannels) * 36;
              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*65,
                                 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, 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
      {
          ALuint original_align;
  
          WriteLock(&ALBuf->lock);
  
          original_align = ((ALBuf->OriginalType == UserFmtIMA4) ?
                            (ChannelsFromUserFmt(ALBuf->OriginalChannels)*36) :
                            FrameSizeFromUserFmt(ALBuf->OriginalChannels,
                                                 ALBuf->OriginalType));
  
          if(SrcChannels != ALBuf->OriginalChannels || SrcType != ALBuf->OriginalType)
              alSetError(Context, AL_INVALID_ENUM);
          else if(offset > ALBuf->OriginalSize ||
                  length > ALBuf->OriginalSize-offset ||
                  (offset%original_align) != 0 ||
                  (length%original_align) != 0)
              alSetError(Context, AL_INVALID_VALUE);
          else
          {
              ALuint Channels = ChannelsFromFmt(ALBuf->FmtChannels);
              ALuint Bytes = BytesFromFmt(ALBuf->FmtType);
              if(SrcType == UserFmtIMA4)
              {
                  /* offset -> byte offset, length -> sample count */
                  offset /= 36;
                  offset *= 65;
                  offset *= Bytes;
                  length /= original_align;
                  length *= 65;
              }
              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 samples,
    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, buffer)) == NULL)
          alSetError(Context, AL_INVALID_NAME);
      else if(samples < 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 = LoadData(ALBuf, samplerate, internalformat, samples,
                         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 samples,
    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, buffer)) == NULL)
          alSetError(Context, AL_INVALID_NAME);
      else if(samples < 0 || offset < 0 || (samples > 0 && data == NULL))
          alSetError(Context, AL_INVALID_VALUE);
      else if(IsValidType(type) == AL_FALSE)
          alSetError(Context, AL_INVALID_ENUM);
      else
      {
          ALuint FrameSize;
  
          WriteLock(&ALBuf->lock);
          FrameSize = FrameSizeFromFmt(ALBuf->FmtChannels, ALBuf->FmtType);
          if(channels != (ALenum)ALBuf->FmtChannels)
              alSetError(Context, AL_INVALID_ENUM);
          else if(offset > ALBuf->SampleLen || samples > ALBuf->SampleLen-offset)
              alSetError(Context, AL_INVALID_VALUE);
          else
          {
              /* offset -> byte offset */
              offset *= FrameSize;
              ConvertData(&((ALubyte*)ALBuf->data)[offset], ALBuf->FmtType,
                          data, type,
                          ChannelsFromFmt(ALBuf->FmtChannels), samples);
          }
          WriteUnlock(&ALBuf->lock);
      }
  
      ALCcontext_DecRef(Context);
  }
  
  AL_API void AL_APIENTRY alGetBufferSamplesSOFT(ALuint buffer,
    ALsizei offset, ALsizei samples,
    ALenum channels, ALenum type, ALvoid *data)
  {
      ALCcontext *Context;
      ALCdevice  *device;
      ALbuffer   *ALBuf;
  
      Context = GetContextRef();
      if(!Context) return;
  
      device = Context->Device;
      if((ALBuf=LookupBuffer(device, buffer)) == NULL)
          alSetError(Context, AL_INVALID_NAME);
      else if(samples < 0 || offset < 0 || (samples > 0 && data == NULL))
          alSetError(Context, AL_INVALID_VALUE);
      else if(IsValidType(type) == AL_FALSE)
          alSetError(Context, AL_INVALID_ENUM);
      else
      {
          ALuint FrameSize;
  
          ReadLock(&ALBuf->lock);
          FrameSize = FrameSizeFromFmt(ALBuf->FmtChannels, ALBuf->FmtType);
          if(channels != (ALenum)ALBuf->FmtChannels)
              alSetError(Context, AL_INVALID_ENUM);
          else if(offset > ALBuf->SampleLen || samples > ALBuf->SampleLen-offset)
              alSetError(Context, AL_INVALID_VALUE);
          else if(type == UserFmtIMA4 && (samples%65) != 0)
              alSetError(Context, AL_INVALID_VALUE);
          else
          {
              /* offset -> byte offset */
              offset *= FrameSize;
              ConvertData(data, type,
                          &((ALubyte*)ALBuf->data)[offset], ALBuf->FmtType,
                          ChannelsFromFmt(ALBuf->FmtChannels), samples);
          }
          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, 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, 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, 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, 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, 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, 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] >= plValues[1] || plValues[0] < 0 ||
                      plValues[1] > ALBuf->SampleLen)
                  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;
      ALbuffer      *pBuffer;
  
      pContext = GetContextRef();
      if(!pContext) return;
  
      device = pContext->Device;
      if(!pflValue)
          alSetError(pContext, AL_INVALID_VALUE);
      else if((pBuffer=LookupBuffer(device, buffer)) == NULL)
          alSetError(pContext, AL_INVALID_NAME);
      else
      {
          switch(eParam)
          {
          case AL_SEC_LENGTH_SOFT:
              ReadLock(&pBuffer->lock);
              if(pBuffer->SampleLen != 0)
                  *pflValue = pBuffer->SampleLen / (ALfloat)pBuffer->Frequency;
              else
                  *pflValue = 0.0f;
              ReadUnlock(&pBuffer->lock);
              break;
  
          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, 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;
  
      switch(eParam)
      {
      case AL_SEC_LENGTH_SOFT:
          alGetBufferf(buffer, eParam, pflValues);
          return;
      }
  
      pContext = GetContextRef();
      if(!pContext) return;
  
      device = pContext->Device;
      if(!pflValues)
          alSetError(pContext, AL_INVALID_VALUE);
      else if(LookupBuffer(device, 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, 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:
              ReadLock(&pBuffer->lock);
              *plValue = pBuffer->SampleLen *
                         FrameSizeFromFmt(pBuffer->FmtChannels, pBuffer->FmtType);
              ReadUnlock(&pBuffer->lock);
              break;
  
          case AL_INTERNAL_FORMAT_SOFT:
              *plValue = pBuffer->Format;
              break;
  
          case AL_BYTE_LENGTH_SOFT:
              *plValue = pBuffer->OriginalSize;
              break;
  
          case AL_SAMPLE_LENGTH_SOFT:
              *plValue = pBuffer->SampleLen;
              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, 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:
      case AL_INTERNAL_FORMAT_SOFT:
      case AL_BYTE_LENGTH_SOFT:
      case AL_SAMPLE_LENGTH_SOFT:
          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, 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 ALalaw;
  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 __inline ALshort DecodeALaw(ALalaw val)
  { return aLawDecompressionTable[val]; }
  
  static ALalaw EncodeALaw(ALshort val)
  {
      ALint mant, exp, sign;
  
      sign = ((~val) >> 8) & 0x80;
      if(!sign)
      {
          val = maxi(val, -32767);
          val = -val;
      }
      val = mini(val, aLawClip);
  
      if(val >= 256)
      {
          exp = aLawCompressTable[(val>>8) & 0x7f];
          mant = (val >> (exp+3)) & 0x0f;
      }
      else
      {
          exp = 0;
          mant = val >> 4;
      }
  
      return ((exp<<4) | mant) ^ (sign^0x55);
  }
  
  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_ALalaw(ALalaw val)
  { return Conv_ALbyte_ALshort(DecodeALaw(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_ALalaw(ALalaw val)
  { return Conv_ALubyte_ALshort(DecodeALaw(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_ALalaw(ALalaw val)
  { return Conv_ALshort_ALshort(DecodeALaw(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_ALalaw(ALalaw val)
  { return Conv_ALushort_ALshort(DecodeALaw(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_ALalaw(ALalaw val)
  { return Conv_ALint_ALshort(DecodeALaw(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_ALalaw(ALalaw val)
  { return Conv_ALuint_ALshort(DecodeALaw(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 (ALfloat)(val * (1.0/2147483647.0)); }
  static __inline ALfloat Conv_ALfloat_ALuint(ALuint val)
  { return (ALfloat)((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) ? (ALfloat)val : 0.0f; }
  static __inline ALfloat Conv_ALfloat_ALmulaw(ALmulaw val)
  { return Conv_ALfloat_ALshort(DecodeMuLaw(val)); }
  static __inline ALfloat Conv_ALfloat_ALalaw(ALalaw val)
  { return Conv_ALfloat_ALshort(DecodeALaw(val)); }
  static __inline ALfloat Conv_ALfloat_ALbyte3(ALbyte3 val)
  { return (ALfloat)(DecodeByte3(val) * (1.0/8388607.0)); }
  static __inline ALfloat Conv_ALfloat_ALubyte3(ALubyte3 val)
  { return (ALfloat)((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_ALalaw(ALalaw val)
  { return Conv_ALdouble_ALshort(DecodeALaw(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(ALalaw)
  DECL_TEMPLATE(ALbyte3)
  DECL_TEMPLATE(ALubyte3)
  
  #undef DECL_TEMPLATE
  
  #define DECL_TEMPLATE(T)                                                      \
  static __inline ALalaw Conv_ALalaw_##T(T val)                                 \
  { return EncodeALaw(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)
  DECL_TEMPLATE(ALmulaw)
  static __inline ALalaw Conv_ALalaw_ALalaw(ALalaw 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)
  DECL_TEMPLATE(ALalaw)
  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(ALalaw)
  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, ALalaw)
  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, ALalaw)
  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, ALalaw)
  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, ALalaw)
  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, ALalaw)
  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, ALalaw)
  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, ALalaw)
  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, ALalaw)
  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, ALalaw)
  DECL_TEMPLATE(ALmulaw, ALbyte3)
  DECL_TEMPLATE(ALmulaw, ALubyte3)
  
  DECL_TEMPLATE(ALalaw, ALbyte)
  DECL_TEMPLATE(ALalaw, ALubyte)
  DECL_TEMPLATE(ALalaw, ALshort)
  DECL_TEMPLATE(ALalaw, ALushort)
  DECL_TEMPLATE(ALalaw, ALint)
  DECL_TEMPLATE(ALalaw, ALuint)
  DECL_TEMPLATE(ALalaw, ALfloat)
  DECL_TEMPLATE(ALalaw, ALdouble)
  DECL_TEMPLATE(ALalaw, ALmulaw)
  DECL_TEMPLATE(ALalaw, ALalaw)
  DECL_TEMPLATE(ALalaw, ALbyte3)
  DECL_TEMPLATE(ALalaw, 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, ALalaw)
  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, ALalaw)
  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 len)                                  \
  {                                                                             \
      ALshort tmp[65*MAXCHANNELS]; /* Max samples an IMA4 frame can be */       \
      ALuint i, j, k;                                                           \
                                                                                \
      i = 0;                                                                    \
      while(i < len)                                                            \
      {                                                                         \
          DecodeIMA4Block(tmp, src, numchans);                                  \
          src += 36*numchans;                                                   \
                                                                                \
          for(j = 0;j < 65 && i < len;j++,i++)                                  \
          {                                                                     \
              for(k = 0;k < numchans;k++)                                       \
                  *(dst++) = Conv_##T##_ALshort(tmp[j*numchans + k]);           \
          }                                                                     \
      }                                                                         \
  }
  
  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(ALalaw)
  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 len)                                    \
  {                                                                             \
      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};                             \
      ALuint i, j;                                                              \
                                                                                \
      for(i = 0;i < len;i += 65)                                                \
      {                                                                         \
          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)
  DECL_TEMPLATE(ALalaw)
  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 UserFmtAlaw:                                                     \
              Convert_##T##_ALalaw(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(ALalaw)
  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 UserFmtAlaw:
              Convert_ALalaw(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;
  
      if(DecomposeFormat(NewFormat, &DstChannels, &DstType) == AL_FALSE ||
         (long)SrcChannels != (long)DstChannels)
          return AL_INVALID_ENUM;
  
      NewChannels = ChannelsFromFmt(DstChannels);
      NewBytes = BytesFromFmt(DstType);
  
      newsize = frames;
      newsize *= NewBytes;
      newsize *= NewChannels;
      if(newsize > INT_MAX)
          return AL_OUT_OF_MEMORY;
  
      WriteLock(&ALBuf->lock);
      if(ALBuf->ref != 0)
      {
          WriteUnlock(&ALBuf->lock);
          return AL_INVALID_OPERATION;
      }
  
      temp = realloc(ALBuf->data, (size_t)newsize);
      if(!temp && newsize)
      {
          WriteUnlock(&ALBuf->lock);
          return AL_OUT_OF_MEMORY;
      }
      ALBuf->data = temp;
  
      if(data != NULL)
          ConvertData(ALBuf->data, DstType, data, SrcType, NewChannels, frames);
  
      if(storesrc)
      {
          ALBuf->OriginalChannels = SrcChannels;
          ALBuf->OriginalType     = SrcType;
          if(SrcType == UserFmtIMA4)
              ALBuf->OriginalSize = frames / 65 * 36 * ChannelsFromUserFmt(SrcChannels);
          else
              ALBuf->OriginalSize = frames * FrameSizeFromUserFmt(SrcChannels, SrcType);
      }
      else
      {
          ALBuf->OriginalChannels = DstChannels;
          ALBuf->OriginalType     = DstType;
          ALBuf->OriginalSize     = frames * NewBytes * NewChannels;
      }
  
      ALBuf->Frequency = freq;
      ALBuf->FmtChannels = DstChannels;
      ALBuf->FmtType = DstType;
      ALBuf->Format = NewFormat;
  
      ALBuf->SampleLen = frames;
      ALBuf->LoopStart = 0;
      ALBuf->LoopEnd = ALBuf->SampleLen;
  
      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 UserFmtAlaw: 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;
  }
  static ALboolean DecomposeUserFormat(ALenum format, enum UserFmtChannels *chans,
                                       enum UserFmtType *type)
  {
      static const struct {
          ALenum format;
          enum UserFmtChannels channels;
          enum UserFmtType type;
      } list[] = {
          { AL_FORMAT_MONO8,           UserFmtMono, UserFmtUByte  },
          { AL_FORMAT_MONO16,          UserFmtMono, UserFmtShort  },
          { AL_FORMAT_MONO_FLOAT32,    UserFmtMono, UserFmtFloat  },
          { AL_FORMAT_MONO_DOUBLE_EXT, UserFmtMono, UserFmtDouble },
          { AL_FORMAT_MONO_IMA4,       UserFmtMono, UserFmtIMA4   },
          { AL_FORMAT_MONO_MULAW,      UserFmtMono, UserFmtMulaw  },
          { AL_FORMAT_MONO_ALAW_EXT,   UserFmtMono, UserFmtAlaw   },
  
          { AL_FORMAT_STEREO8,           UserFmtStereo, UserFmtUByte  },
          { AL_FORMAT_STEREO16,          UserFmtStereo, UserFmtShort  },
          { AL_FORMAT_STEREO_FLOAT32,    UserFmtStereo, UserFmtFloat  },
          { AL_FORMAT_STEREO_DOUBLE_EXT, UserFmtStereo, UserFmtDouble },
          { AL_FORMAT_STEREO_IMA4,       UserFmtStereo, UserFmtIMA4   },
          { AL_FORMAT_STEREO_MULAW,      UserFmtStereo, UserFmtMulaw  },
          { AL_FORMAT_STEREO_ALAW_EXT,   UserFmtStereo, UserFmtAlaw   },
  
          { AL_FORMAT_REAR8,      UserFmtRear, UserFmtUByte },
          { AL_FORMAT_REAR16,     UserFmtRear, UserFmtShort },
          { AL_FORMAT_REAR32,     UserFmtRear, UserFmtFloat },
          { AL_FORMAT_REAR_MULAW, UserFmtRear, UserFmtMulaw },
  
          { AL_FORMAT_QUAD8_LOKI,  UserFmtQuad, UserFmtUByte },
          { AL_FORMAT_QUAD16_LOKI, UserFmtQuad, UserFmtShort },
  
          { AL_FORMAT_QUAD8,      UserFmtQuad, UserFmtUByte },
          { AL_FORMAT_QUAD16,     UserFmtQuad, UserFmtShort },
          { AL_FORMAT_QUAD32,     UserFmtQuad, UserFmtFloat },
          { AL_FORMAT_QUAD_MULAW, UserFmtQuad, UserFmtMulaw },
  
          { AL_FORMAT_51CHN8,      UserFmtX51, UserFmtUByte },
          { AL_FORMAT_51CHN16,     UserFmtX51, UserFmtShort },
          { AL_FORMAT_51CHN32,     UserFmtX51, UserFmtFloat },
          { AL_FORMAT_51CHN_MULAW, UserFmtX51, UserFmtMulaw },
  
          { AL_FORMAT_61CHN8,      UserFmtX61, UserFmtUByte },
          { AL_FORMAT_61CHN16,     UserFmtX61, UserFmtShort },
          { AL_FORMAT_61CHN32,     UserFmtX61, UserFmtFloat },
          { AL_FORMAT_61CHN_MULAW, UserFmtX61, UserFmtMulaw },
  
          { AL_FORMAT_71CHN8,      UserFmtX71, UserFmtUByte },
          { AL_FORMAT_71CHN16,     UserFmtX71, UserFmtShort },
          { AL_FORMAT_71CHN32,     UserFmtX71, UserFmtFloat },
          { AL_FORMAT_71CHN_MULAW, UserFmtX71, UserFmtMulaw },
      };
      ALuint i;
  
      for(i = 0;i < sizeof(list)/sizeof(list[0]);i++)
      {
          if(list[i].format == format)
          {
              *chans = list[i].channels;
              *type  = list[i].type;
              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;
  }
  static ALboolean DecomposeFormat(ALenum format, enum FmtChannels *chans, enum FmtType *type)
  {
      static const struct {
          ALenum format;
          enum FmtChannels channels;
          enum FmtType type;
      } list[] = {
          { AL_MONO8_SOFT,   FmtMono, FmtByte  },
          { AL_MONO16_SOFT,  FmtMono, FmtShort },
          { AL_MONO32F_SOFT, FmtMono, FmtFloat },
  
          { AL_STEREO8_SOFT,   FmtStereo, FmtByte  },
          { AL_STEREO16_SOFT,  FmtStereo, FmtShort },
          { AL_STEREO32F_SOFT, FmtStereo, FmtFloat },
  
          { AL_REAR8_SOFT,   FmtRear, FmtByte  },
          { AL_REAR16_SOFT,  FmtRear, FmtShort },
          { AL_REAR32F_SOFT, FmtRear, FmtFloat },
  
          { AL_FORMAT_QUAD8_LOKI,  FmtQuad, FmtByte  },
          { AL_FORMAT_QUAD16_LOKI, FmtQuad, FmtShort },
  
          { AL_QUAD8_SOFT,   FmtQuad, FmtByte  },
          { AL_QUAD16_SOFT,  FmtQuad, FmtShort },
          { AL_QUAD32F_SOFT, FmtQuad, FmtFloat },
  
          { AL_5POINT1_8_SOFT,   FmtX51, FmtByte  },
          { AL_5POINT1_16_SOFT,  FmtX51, FmtShort },
          { AL_5POINT1_32F_SOFT, FmtX51, FmtFloat },
  
          { AL_6POINT1_8_SOFT,   FmtX61, FmtByte  },
          { AL_6POINT1_16_SOFT,  FmtX61, FmtShort },
          { AL_6POINT1_32F_SOFT, FmtX61, FmtFloat },
  
          { AL_7POINT1_8_SOFT,   FmtX71, FmtByte  },
          { AL_7POINT1_16_SOFT,  FmtX71, FmtShort },
          { AL_7POINT1_32F_SOFT, FmtX71, FmtFloat },
      };
      ALuint i;
  
      for(i = 0;i < sizeof(list)/sizeof(list[0]);i++)
      {
          if(list[i].format == format)
          {
              *chans = list[i].channels;
              *type  = list[i].type;
              return AL_TRUE;
          }
      }
  
      return AL_FALSE;
  }
  
  
  static ALboolean IsValidType(ALenum type)
  {
      switch(type)
      {
          case AL_BYTE_SOFT:
          case AL_UNSIGNED_BYTE_SOFT:
          case AL_SHORT_SOFT:
          case AL_UNSIGNED_SHORT_SOFT:
          case AL_INT_SOFT:
          case AL_UNSIGNED_INT_SOFT:
          case AL_FLOAT_SOFT:
          case AL_DOUBLE_SOFT:
          case AL_BYTE3_SOFT:
          case AL_UNSIGNED_BYTE3_SOFT:
              return AL_TRUE;
      }
      return AL_FALSE;
  }
  
  static ALboolean IsValidChannels(ALenum channels)
  {
      switch(channels)
      {
          case AL_MONO_SOFT:
          case AL_STEREO_SOFT:
          case AL_REAR_SOFT:
          case AL_QUAD_SOFT:
          case AL_5POINT1_SOFT:
          case AL_6POINT1_SOFT:
          case AL_7POINT1_SOFT:
              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);
      }
  }
  