macosx/plugins/DFSound/src/macosx.c

   1 /***************************************************************************\r
   2                         macosx.c  -  description\r
   3                              -------------------\r
   4     begin                : Wed May 15 2002\r
   5     copyright            : (C) 2002 by Pete Bernert\r
   6     email                : BlackDove@addcom.de\r
   7  ***************************************************************************/\r
   8 \r
   9 /***************************************************************************\r
  10  *                                                                         *\r
  11  *   This program is free software; you can redistribute it and/or modify  *\r
  12  *   it under the terms of the GNU General Public License as published by  *\r
  13  *   the Free Software Foundation; either version 2 of the License, or     *\r
  14  *   (at your option) any later version. See also the license.txt file for *\r
  15  *   additional informations.                                              *\r
  16  *                                                                         *\r
  17  ***************************************************************************/\r
  18 \r
  19 #include "stdafx.h"\r
  20 \r
  21 #define _IN_MACOSX\r
  22 \r
  23 #ifdef _MACOSX\r
  24 \r
  25 #include <Carbon/Carbon.h>\r
  26 #include "externals.h"\r
  27 \r
  28 #define kMaxSoundBuffers        20\r
  29 \r
  30 //static int                            macBufferSize = 2, macBufferCount = 36;\r
  31 //static float                  macSoundPitch = 1.0;\r
  32 static long                        macSoundVolume = 100;\r
  33 volatile int                    soundBufferAt = -1, soundPlayAt = -1, soundQueued = 0;\r
  34 char                    *soundBuffer[kMaxSoundBuffers+1], *emptyBuffer;\r
  35 SndChannelPtr   sndChannel;\r
  36 //ExtSoundHeader        sndHeader;\r
  37 CmpSoundHeader  sndHeader;\r
  38 SndCallBackUPP  callBackUPP;\r
  39 static int bufferIndex;\r
  40 \r
  41 ////////////////////////////////////////////////////////////////////////\r
  42 // small linux time helper... only used for watchdog\r
  43 ////////////////////////////////////////////////////////////////////////\r
  44 \r
  45 unsigned long timeGetTime()\r
  46 {\r
  47  struct timeval tv;\r
  48  gettimeofday(&tv, 0);                                 // well, maybe there are better ways\r
  49  return tv.tv_sec * 1000 + tv.tv_usec/1000;            // to do that, but at least it works\r
  50 }\r
  51 \r
  52 pascal void MacProcessSound(SndChannelPtr chan, SndCommand *cmd)\r
  53 {\r
  54         #pragma unused (chan, cmd)\r
  55 \r
  56         if (soundQueued <= 0)\r
  57                 sndHeader.samplePtr = emptyBuffer;\r
  58         else\r
  59         {\r
  60                 sndHeader.samplePtr = soundBuffer[soundPlayAt];\r
  61                 soundPlayAt++;\r
  62                 if (soundPlayAt >= kMaxSoundBuffers/*macBufferCount*/)\r
  63                         soundPlayAt = 0;\r
  64                 soundQueued--;\r
  65         }\r
  66         \r
  67         SndCommand buffer   = { bufferCmd, 0, (long) &sndHeader };\r
  68         SndDoImmediate(sndChannel, &buffer);\r
  69 \r
  70         SndCommand callback = { callBackCmd, 0, 0 };\r
  71         SndDoCommand(sndChannel, &callback, true);\r
  72 }\r
  73 \r
  74 ////////////////////////////////////////////////////////////////////////\r
  75 // SETUP SOUND\r
  76 ////////////////////////////////////////////////////////////////////////\r
  77 \r
  78 static int buffer_size;\r
  79 void SetupSound(void)\r
  80 {\r
  81         int     count;\r
  82         \r
  83    callBackUPP = NewSndCallBackUPP(MacProcessSound);\r
  84    \r
  85         if (sndChannel)\r
  86         {\r
  87                 SndDisposeChannel(sndChannel, true);\r
  88                 sndChannel = nil;\r
  89         }\r
  90    \r
  91    buffer_size = 1;\r
  92    while (buffer_size < (44100 / 60))\r
  93       buffer_size <<= 1;\r
  94         \r
  95         memset(&sndHeader, 0, sizeof(sndHeader));\r
  96         sndHeader.numChannels   = (iDisStereo ? 1 : 2);\r
  97         sndHeader.sampleRate    = 44100 << 16;\r
  98         sndHeader.encode        = cmpSH;\r
  99         sndHeader.baseFrequency = kMiddleC;\r
 100         sndHeader.numFrames     = buffer_size;\r
 101         sndHeader.sampleSize    = 16;\r
 102 #ifdef __POWERPC__\r
 103     sndHeader.format        = k16BitBigEndianFormat;\r
 104 #else\r
 105     sndHeader.format        = k16BitLittleEndianFormat;\r
 106 #endif\r
 107     sndHeader.compressionID = fixedCompression;\r
 108    \r
 109         if (soundBufferAt != -1)\r
 110         {\r
 111       free(soundBuffer[0]);\r
 112                 free(emptyBuffer);\r
 113         }\r
 114    \r
 115    soundBuffer[0] = (char *) calloc(buffer_size << 2, kMaxSoundBuffers);\r
 116         for (count = 1; count <= kMaxSoundBuffers; count++)\r
 117                 soundBuffer[count] = soundBuffer[count-1] + (buffer_size << 2);\r
 118         emptyBuffer = (char *) calloc(buffer_size << 2, 1);\r
 119         \r
 120         soundBufferAt = soundPlayAt = soundQueued = 0;\r
 121         bufferIndex = 0;\r
 122         \r
 123         SndNewChannel(&sndChannel, sampledSynth, initStereo, callBackUPP);\r
 124 \r
 125         SndCommand      sndcmd;\r
 126         UInt32          volume;\r
 127         \r
 128         volume = (UInt32) (256.0 * (float) macSoundVolume / 100.0);\r
 129         \r
 130         sndcmd.cmd = volumeCmd;\r
 131    sndcmd.param1 = 0;\r
 132    sndcmd.param2 = (volume << 16) | volume;\r
 133    SndDoCommand(sndChannel, &sndcmd, true);\r
 134 \r
 135    sndcmd.cmd = callBackCmd;\r
 136    sndcmd.param1 = 0;\r
 137    sndcmd.param2 = 0;   \r
 138         SndDoCommand(sndChannel, &sndcmd, true);\r
 139 }\r
 140 \r
 141 ////////////////////////////////////////////////////////////////////////\r
 142 // REMOVE SOUND\r
 143 ////////////////////////////////////////////////////////////////////////\r
 144 \r
 145 void RemoveSound(void)\r
 146 {\r
 147    DisposeSndCallBackUPP(callBackUPP);\r
 148 }\r
 149 \r
 150 ////////////////////////////////////////////////////////////////////////\r
 151 // GET BYTES BUFFERED\r
 152 ////////////////////////////////////////////////////////////////////////\r
 153 \r
 154 unsigned long SoundGetBytesBuffered(void)\r
 155 {\r
 156         int bytes;\r
 157         int playAt = soundPlayAt;\r
 158         \r
 159    if (soundBufferAt < playAt) {\r
 160       bytes = (soundBuffer[kMaxSoundBuffers]-soundBuffer[playAt])+\r
 161       (soundBuffer[soundBufferAt]-soundBuffer[0]);\r
 162    } else {\r
 163                 bytes = soundBuffer[soundBufferAt]-soundBuffer[playAt];\r
 164         }\r
 165         //printf("sb=%i\n", bytes);\r
 166         \r
 167 //      if (bytes < SOUNDSIZE/2)\r
 168 //              return 0;\r
 169         \r
 170         return bytes;\r
 171 }\r
 172 \r
 173 ////////////////////////////////////////////////////////////////////////\r
 174 // FEED SOUND DATA\r
 175 ////////////////////////////////////////////////////////////////////////\r
 176 \r
 177 void SoundFeedStreamData(unsigned char* pSound,long lBytes)\r
 178 {\r
 179     int rem;\r
 180     \r
 181    if (lBytes > (buffer_size<<2)*kMaxSoundBuffers) {\r
 182       printf("sound feed overflow!\n");\r
 183       return;\r
 184    }\r
 185 \r
 186    rem = soundBuffer[kMaxSoundBuffers]-(soundBuffer[soundBufferAt]+bufferIndex);\r
 187    if (lBytes > rem) {\r
 188       memcpy(soundBuffer[soundBufferAt]+bufferIndex, pSound, rem);\r
 189       lBytes -= rem; pSound += rem;\r
 190       soundQueued += kMaxSoundBuffers-soundBufferAt;\r
 191       soundBufferAt = 0; bufferIndex = 0;\r
 192    }\r
 193    memcpy(soundBuffer[soundBufferAt]+bufferIndex, pSound, lBytes);\r
 194    soundBufferAt += (lBytes+bufferIndex)/(buffer_size<<2);\r
 195    soundQueued += (lBytes+bufferIndex)/(buffer_size<<2);\r
 196    bufferIndex = (lBytes+bufferIndex)%(buffer_size<<2);\r
 197    \r
 198    if (soundQueued >= kMaxSoundBuffers) {\r
 199       printf("sound buffer overflow!\n");\r
 200    }\r
 201 }\r
 202 \r
 203 #endif\r