Mercurial > sdl-ios-xcode
annotate src/audio/mint/SDL_mintaudio_mcsn.c @ 1106:524fd51f5d2c
Disable XBIOS in interrupt also under Magic
author | Patrice Mandin <patmandin@gmail.com> |
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date | Fri, 29 Jul 2005 10:59:49 +0000 |
parents | f10892fa2e48 |
children | 856f76a099c7 |
rev | line source |
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1 /* |
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2 SDL - Simple DirectMedia Layer |
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Updated copyright information for 2004 (Happy New Year!)
Sam Lantinga <slouken@libsdl.org>
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3 Copyright (C) 1997-2004 Sam Lantinga |
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4 |
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5 This library is free software; you can redistribute it and/or |
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6 modify it under the terms of the GNU Library General Public |
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7 License as published by the Free Software Foundation; either |
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8 version 2 of the License, or (at your option) any later version. |
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9 |
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10 This library is distributed in the hope that it will be useful, |
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 Library General Public License for more details. |
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14 |
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15 You should have received a copy of the GNU Library General Public |
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16 License along with this library; if not, write to the Free |
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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18 |
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19 Sam Lantinga |
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20 slouken@libsdl.org |
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21 */ |
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22 |
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23 /* |
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24 MiNT audio driver |
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25 using XBIOS functions (MacSound compatible driver) |
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26 |
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27 Patrice Mandin |
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28 */ |
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29 |
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30 #include <stdlib.h> |
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31 #include <stdio.h> |
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32 #include <string.h> |
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33 |
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34 /* Mint includes */ |
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35 #include <mint/osbind.h> |
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36 #include <mint/falcon.h> |
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37 #include <mint/cookie.h> |
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38 |
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39 #include "SDL_endian.h" |
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40 #include "SDL_audio.h" |
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41 #include "SDL_audio_c.h" |
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42 #include "SDL_audiomem.h" |
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43 #include "SDL_sysaudio.h" |
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44 |
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45 #include "SDL_atarimxalloc_c.h" |
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46 |
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47 #include "SDL_mintaudio.h" |
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48 #include "SDL_mintaudio_mcsn.h" |
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49 |
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50 /*--- Defines ---*/ |
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51 |
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52 #define MINT_AUDIO_DRIVER_NAME "mint_mcsn" |
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53 |
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54 /* Debug print info */ |
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55 #define DEBUG_NAME "audio:mcsn: " |
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56 #if 0 |
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57 #define DEBUG_PRINT(what) \ |
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58 { \ |
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59 printf what; \ |
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60 } |
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61 #else |
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62 #define DEBUG_PRINT(what) |
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63 #endif |
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64 |
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65 /*--- Static variables ---*/ |
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66 |
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67 static unsigned long cookie_snd, cookie_mch; |
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68 static cookie_mcsn_t *cookie_mcsn; |
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69 |
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70 /*--- Audio driver functions ---*/ |
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71 |
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72 static void Mint_CloseAudio(_THIS); |
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73 static int Mint_OpenAudio(_THIS, SDL_AudioSpec *spec); |
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74 static void Mint_LockAudio(_THIS); |
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75 static void Mint_UnlockAudio(_THIS); |
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76 |
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77 /* To check/init hardware audio */ |
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78 static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec); |
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79 static void Mint_InitAudio(_THIS, SDL_AudioSpec *spec); |
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80 |
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81 /*--- Audio driver bootstrap functions ---*/ |
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82 |
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83 static int Audio_Available(void) |
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84 { |
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85 unsigned long dummy; |
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86 const char *envr = getenv("SDL_AUDIODRIVER"); |
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87 |
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88 /* We can't use XBIOS in interrupt under MiNT */ |
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89 if (Getcookie(C_MiNT, &dummy) == C_FOUND) { |
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90 return(0); |
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91 } |
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92 |
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93 /* nor with Magic */ |
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94 if (Getcookie(C_MagX, &dummy) == C_FOUND) { |
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95 return(0); |
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96 } |
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97 |
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98 /* Check if user asked a different audio driver */ |
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99 if ((envr) && (strcmp(envr, MINT_AUDIO_DRIVER_NAME)!=0)) { |
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100 DEBUG_PRINT((DEBUG_NAME "user asked a different audio driver\n")); |
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101 return(0); |
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102 } |
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103 |
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104 /* Cookie _MCH present ? if not, assume ST machine */ |
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105 if (Getcookie(C__MCH, &cookie_mch) == C_NOTFOUND) { |
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106 cookie_mch = MCH_ST; |
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107 } |
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108 |
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109 /* Cookie _SND present ? if not, assume ST machine */ |
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110 if (Getcookie(C__SND, &cookie_snd) == C_NOTFOUND) { |
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111 cookie_snd = SND_PSG; |
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112 } |
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113 |
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114 /* Check if we have 16 bits audio */ |
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115 if ((cookie_snd & SND_16BIT)==0) { |
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116 DEBUG_PRINT((DEBUG_NAME "no 16 bits sound\n")); |
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117 return(0); |
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118 } |
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119 |
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120 /* Cookie MCSN present ? */ |
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121 if (Getcookie(C_McSn, (long *) &cookie_mcsn) != C_FOUND) { |
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122 DEBUG_PRINT((DEBUG_NAME "no MCSN audio\n")); |
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123 return(0); |
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124 } |
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125 |
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126 /* Check if interrupt at end of replay */ |
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127 if (cookie_mcsn->pint == 0) { |
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128 DEBUG_PRINT((DEBUG_NAME "no interrupt at end of replay\n")); |
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129 return(0); |
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130 } |
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131 |
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132 /* Check if audio is lockable */ |
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133 if (Locksnd()!=1) { |
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134 DEBUG_PRINT((DEBUG_NAME "audio locked by other application\n")); |
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135 return(0); |
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136 } |
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137 |
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138 Unlocksnd(); |
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139 |
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140 DEBUG_PRINT((DEBUG_NAME "MCSN audio available!\n")); |
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141 return(1); |
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142 } |
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143 |
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144 static void Audio_DeleteDevice(SDL_AudioDevice *device) |
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145 { |
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146 free(device->hidden); |
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147 free(device); |
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148 } |
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149 |
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150 static SDL_AudioDevice *Audio_CreateDevice(int devindex) |
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151 { |
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152 SDL_AudioDevice *this; |
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153 |
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154 /* Initialize all variables that we clean on shutdown */ |
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155 this = (SDL_AudioDevice *)malloc(sizeof(SDL_AudioDevice)); |
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156 if ( this ) { |
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157 memset(this, 0, (sizeof *this)); |
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158 this->hidden = (struct SDL_PrivateAudioData *) |
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159 malloc((sizeof *this->hidden)); |
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160 } |
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161 if ( (this == NULL) || (this->hidden == NULL) ) { |
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162 SDL_OutOfMemory(); |
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163 if ( this ) { |
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164 free(this); |
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165 } |
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166 return(0); |
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167 } |
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168 memset(this->hidden, 0, (sizeof *this->hidden)); |
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169 |
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170 /* Set the function pointers */ |
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171 this->OpenAudio = Mint_OpenAudio; |
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172 this->CloseAudio = Mint_CloseAudio; |
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173 this->LockAudio = Mint_LockAudio; |
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174 this->UnlockAudio = Mint_UnlockAudio; |
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175 this->free = Audio_DeleteDevice; |
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176 |
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177 return this; |
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178 } |
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179 |
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180 AudioBootStrap MINTAUDIO_MCSN_bootstrap = { |
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181 MINT_AUDIO_DRIVER_NAME, "MiNT MCSN audio driver", |
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182 Audio_Available, Audio_CreateDevice |
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183 }; |
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184 |
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185 static void Mint_LockAudio(_THIS) |
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186 { |
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187 /* Stop replay */ |
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188 Buffoper(0); |
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189 } |
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190 |
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191 static void Mint_UnlockAudio(_THIS) |
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192 { |
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193 /* Restart replay */ |
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194 Buffoper(SB_PLA_ENA|SB_PLA_RPT); |
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195 } |
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196 |
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197 static void Mint_CloseAudio(_THIS) |
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198 { |
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199 /* Stop replay */ |
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200 Buffoper(0); |
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201 |
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202 /* Uninstall interrupt */ |
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203 Jdisint(MFP_DMASOUND); |
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204 |
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205 /* Wait if currently playing sound */ |
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206 while (SDL_MintAudio_mutex != 0) { |
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207 } |
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208 |
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209 /* Clear buffers */ |
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210 if (SDL_MintAudio_audiobuf[0]) { |
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211 Mfree(SDL_MintAudio_audiobuf[0]); |
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212 SDL_MintAudio_audiobuf[0] = SDL_MintAudio_audiobuf[1] = NULL; |
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213 } |
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214 |
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215 /* Unlock sound system */ |
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216 Unlocksnd(); |
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217 } |
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218 |
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219 static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec) |
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220 { |
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221 int i; |
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222 unsigned long masterclock, masterprediv; |
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223 |
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224 DEBUG_PRINT((DEBUG_NAME "asked: %d bits, ",spec->format & 0x00ff)); |
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225 DEBUG_PRINT(("signed=%d, ", ((spec->format & 0x8000)!=0))); |
704 | 226 DEBUG_PRINT(("big endian=%d, ", ((spec->format & 0x1000)!=0))); |
644
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227 DEBUG_PRINT(("channels=%d, ", spec->channels)); |
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228 DEBUG_PRINT(("freq=%d\n", spec->freq)); |
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229 |
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230 /* Check formats available */ |
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231 MINTAUDIO_freqcount=0; |
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232 switch(cookie_mcsn->play) { |
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233 case MCSN_ST: |
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234 spec->channels=1; |
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235 spec->format=8; /* FIXME: is it signed or unsigned ? */ |
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236 SDL_MintAudio_AddFrequency(this, 12500, 0, 0); |
644
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237 break; |
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238 case MCSN_TT: /* Also STE, Mega STE */ |
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239 spec->format=AUDIO_S8; |
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240 masterclock=MASTERCLOCK_STE; |
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241 masterprediv=MASTERPREDIV_STE; |
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242 if ((cookie_mch>>16)==MCH_TT) { |
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243 masterclock=MASTERCLOCK_TT; |
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244 masterprediv=MASTERPREDIV_TT; |
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245 } |
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246 for (i=0; i<4; i++) { |
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247 SDL_MintAudio_AddFrequency(this, masterclock/(masterprediv*(1<<i)), masterclock, 3-i); |
644
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248 } |
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249 break; |
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250 case MCSN_FALCON: /* Also Mac */ |
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251 for (i=1; i<12; i++) { |
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252 /* Remove unusable Falcon codec predivisors */ |
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253 if ((i==6) || (i==8) || (i==10)) { |
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254 continue; |
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255 } |
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256 SDL_MintAudio_AddFrequency(this, MASTERCLOCK_FALCON1/(MASTERPREDIV_FALCON*(i+1)), CLK25M, i+1); |
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257 } |
644
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258 if (cookie_mcsn->res1 != 0) { |
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259 for (i=1; i<4; i++) { |
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260 SDL_MintAudio_AddFrequency(this, (cookie_mcsn->res1)/(MASTERPREDIV_FALCON*(1<<i)), CLKEXT, (1<<i)-1); |
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261 } |
644
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262 } |
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263 spec->format |= 0x8000; /* Audio is always signed */ |
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264 if ((spec->format & 0x00ff)==16) { |
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265 spec->format |= 0x1000; /* Audio is always big endian */ |
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266 spec->channels=2; /* 16 bits always stereo */ |
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267 } |
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268 break; |
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269 } |
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270 |
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271 #if 1 |
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272 for (i=0; i<MINTAUDIO_freqcount; i++) { |
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273 DEBUG_PRINT((DEBUG_NAME "freq %d: %lu Hz, clock %lu, prediv %d\n", |
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274 i, MINTAUDIO_frequencies[i].frequency, MINTAUDIO_frequencies[i].masterclock, |
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275 MINTAUDIO_frequencies[i].predivisor |
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276 )); |
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277 } |
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278 #endif |
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279 |
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280 MINTAUDIO_numfreq=SDL_MintAudio_SearchFrequency(this, spec->freq); |
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281 spec->freq=MINTAUDIO_frequencies[MINTAUDIO_numfreq].frequency; |
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282 |
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283 DEBUG_PRINT((DEBUG_NAME "obtained: %d bits, ",spec->format & 0x00ff)); |
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284 DEBUG_PRINT(("signed=%d, ", ((spec->format & 0x8000)!=0))); |
704 | 285 DEBUG_PRINT(("big endian=%d, ", ((spec->format & 0x1000)!=0))); |
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286 DEBUG_PRINT(("channels=%d, ", spec->channels)); |
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287 DEBUG_PRINT(("freq=%d\n", spec->freq)); |
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288 |
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289 return 0; |
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290 } |
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291 |
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292 static void Mint_InitAudio(_THIS, SDL_AudioSpec *spec) |
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293 { |
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294 int channels_mode, prediv, dmaclock; |
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295 void *buffer; |
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296 |
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297 /* Stop currently playing sound */ |
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298 Buffoper(0); |
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299 |
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300 /* Set replay tracks */ |
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301 Settracks(0,0); |
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302 Setmontracks(0); |
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303 |
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304 /* Select replay format */ |
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305 channels_mode=STEREO16; |
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306 switch (spec->format & 0xff) { |
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307 case 8: |
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308 if (spec->channels==2) { |
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309 channels_mode=STEREO8; |
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310 } else { |
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311 channels_mode=MONO8; |
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312 } |
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313 break; |
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314 } |
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315 if (Setmode(channels_mode)<0) { |
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316 DEBUG_PRINT((DEBUG_NAME "Setmode() failed\n")); |
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317 } |
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318 |
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319 dmaclock = MINTAUDIO_frequencies[MINTAUDIO_numfreq].masterclock; |
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320 prediv = MINTAUDIO_frequencies[MINTAUDIO_numfreq].predivisor; |
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321 switch(cookie_mcsn->play) { |
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322 case MCSN_TT: |
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323 Devconnect(DMAPLAY, DAC, CLK25M, CLKOLD, 1); |
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324 Soundcmd(SETPRESCALE, prediv); |
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325 DEBUG_PRINT((DEBUG_NAME "STE/TT prescaler selected\n")); |
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326 break; |
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327 case MCSN_FALCON: |
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328 Devconnect(DMAPLAY, DAC, dmaclock, prediv, 1); |
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329 DEBUG_PRINT((DEBUG_NAME "Falcon prescaler selected\n")); |
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330 break; |
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331 } |
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332 |
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333 /* Set buffer */ |
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334 buffer = SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf]; |
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335 if (Setbuffer(0, buffer, buffer + spec->size)<0) { |
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336 DEBUG_PRINT((DEBUG_NAME "Setbuffer() failed\n")); |
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337 } |
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338 |
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339 /* Install interrupt */ |
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340 Jdisint(MFP_DMASOUND); |
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341 Xbtimer(XB_TIMERA, 8, 1, SDL_MintAudio_XbiosInterrupt); |
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342 Jenabint(MFP_DMASOUND); |
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343 |
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344 if (Setinterrupt(SI_TIMERA, SI_PLAY)<0) { |
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345 DEBUG_PRINT((DEBUG_NAME "Setinterrupt() failed\n")); |
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346 } |
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347 |
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348 /* Go */ |
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349 Buffoper(SB_PLA_ENA|SB_PLA_RPT); |
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350 DEBUG_PRINT((DEBUG_NAME "hardware initialized\n")); |
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351 } |
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352 |
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353 static int Mint_OpenAudio(_THIS, SDL_AudioSpec *spec) |
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354 { |
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355 /* Lock sound system */ |
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356 if (Locksnd()!=1) { |
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357 SDL_SetError("Mint_OpenAudio: Audio system already in use"); |
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358 return(-1); |
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359 } |
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360 |
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361 SDL_MintAudio_device = this; |
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362 |
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363 /* Check audio capabilities */ |
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364 if (Mint_CheckAudio(this, spec)==-1) { |
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365 return -1; |
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366 } |
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367 |
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368 SDL_CalculateAudioSpec(spec); |
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369 |
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370 /* Allocate memory for audio buffers in DMA-able RAM */ |
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371 DEBUG_PRINT((DEBUG_NAME "buffer size=%d\n", spec->size)); |
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372 |
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373 SDL_MintAudio_audiobuf[0] = Atari_SysMalloc(spec->size *2, MX_STRAM); |
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374 if (SDL_MintAudio_audiobuf[0]==NULL) { |
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375 SDL_SetError("MINT_OpenAudio: Not enough memory for audio buffer"); |
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376 return (-1); |
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377 } |
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378 SDL_MintAudio_audiobuf[1] = SDL_MintAudio_audiobuf[0] + spec->size ; |
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379 SDL_MintAudio_numbuf=0; |
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380 memset(SDL_MintAudio_audiobuf[0], spec->silence, spec->size *2); |
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381 SDL_MintAudio_audiosize = spec->size; |
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382 SDL_MintAudio_mutex = 0; |
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383 |
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384 DEBUG_PRINT((DEBUG_NAME "buffer 0 at 0x%08x\n", SDL_MintAudio_audiobuf[0])); |
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385 DEBUG_PRINT((DEBUG_NAME "buffer 1 at 0x%08x\n", SDL_MintAudio_audiobuf[1])); |
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386 |
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387 /* Setup audio hardware */ |
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388 Mint_InitAudio(this, spec); |
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389 |
594422ab8f9f
Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff
changeset
|
390 return(1); /* We don't use threaded audio */ |
594422ab8f9f
Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff
changeset
|
391 } |