Mercurial > sdl-ios-xcode
annotate src/audio/mint/SDL_mintaudio_stfa.c @ 2208:b03710fb0333
Fixed bug #467
Remove trailing commas from enums
author | Sam Lantinga <slouken@libsdl.org> |
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date | Sun, 22 Jul 2007 13:22:47 +0000 |
parents | 29e07f91bc1f |
children | 99210400e8b9 |
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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!)
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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 #include "SDL_config.h" |
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23 |
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24 /* |
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25 MiNT audio driver |
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26 using XBIOS functions (STFA driver) |
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27 |
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28 Patrice Mandin |
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29 */ |
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30 |
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31 /* Mint includes */ |
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32 #include <mint/osbind.h> |
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33 #include <mint/falcon.h> |
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34 #include <mint/cookie.h> |
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35 |
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36 #include "SDL_audio.h" |
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37 #include "../SDL_audio_c.h" |
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38 #include "../SDL_sysaudio.h" |
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39 |
1412 | 40 #include "../../video/ataricommon/SDL_atarimxalloc_c.h" |
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41 |
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42 #include "SDL_mintaudio.h" |
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43 #include "SDL_mintaudio_stfa.h" |
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44 |
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45 /*--- Defines ---*/ |
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46 |
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47 #define MINT_AUDIO_DRIVER_NAME "mint_stfa" |
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48 |
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49 /* Debug print info */ |
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50 #define DEBUG_NAME "audio:stfa: " |
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51 #if 0 |
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52 #define DEBUG_PRINT(what) \ |
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53 { \ |
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54 printf what; \ |
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55 } |
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56 #else |
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57 #define DEBUG_PRINT(what) |
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58 #endif |
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59 |
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60 /*--- Static variables ---*/ |
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61 |
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62 static unsigned long cookie_snd = 0; |
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63 static unsigned long cookie_mch = 0; |
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64 static cookie_stfa_t *cookie_stfa = NULL; |
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65 |
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66 static const int freqs[16] = { |
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67 4995, 6269, 7493, 8192, |
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68 9830, 10971, 12538, 14985, |
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69 16384, 19819, 21943, 24576, |
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70 30720, 32336, 43885, 49152 |
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71 }; |
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72 |
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73 static void |
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74 MINTSTFA_LockDevice(_THIS) |
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75 { |
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76 /* Stop replay */ |
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77 void *oldpile = (void *) Super(0); |
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78 cookie_stfa->sound_enable = STFA_PLAY_DISABLE; |
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79 Super(oldpile); |
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80 } |
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81 |
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82 static void |
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83 MINTSTFA_UnlockDevice(_THIS) |
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84 { |
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85 /* Restart replay */ |
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86 void *oldpile = (void *) Super(0); |
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87 cookie_stfa->sound_enable = STFA_PLAY_ENABLE | STFA_PLAY_REPEAT; |
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88 Super(oldpile); |
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89 } |
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90 |
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91 static void |
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92 MINTSTFA_CloseDevice(_THIS) |
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93 { |
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94 if (this->hidden != NULL) { |
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95 /* Stop replay */ |
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96 void *oldpile = (void *) Super(0); |
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97 cookie_stfa->sound_enable = STFA_PLAY_DISABLE; |
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98 Super(oldpile); |
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99 |
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100 /* Wait if currently playing sound */ |
2060 | 101 while (SDL_MintAudio_mutex != 0) { |
102 } | |
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103 |
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104 /* Clear buffers */ |
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105 if (SDL_MintAudio_audiobuf[0]) { |
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106 Mfree(SDL_MintAudio_audiobuf[0]); |
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107 SDL_MintAudio_audiobuf[0] = SDL_MintAudio_audiobuf[1] = NULL; |
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108 } |
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109 |
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110 SDL_free(this->hidden); |
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111 this->hidden = NULL; |
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112 } |
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113 } |
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114 |
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115 static int |
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116 MINTSTFA_CheckAudio(_THIS) |
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117 { |
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118 int i; |
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119 |
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121 SDL_AUDIO_BITSIZE(this->spec.format))); |
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122 DEBUG_PRINT(("float=%d, ", SDL_AUDIO_ISFLOAT(this->spec.format))); |
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123 DEBUG_PRINT(("signed=%d, ", SDL_AUDIO_ISSIGNED(this->spec.format))); |
2060 | 124 DEBUG_PRINT(("big endian=%d, ", |
125 SDL_AUDIO_ISBIGENDIAN(this->spec.format))); | |
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126 DEBUG_PRINT(("channels=%d, ", this->spec.channels)); |
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127 DEBUG_PRINT(("freq=%d\n", this->spec.freq)); |
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128 |
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129 if (SDL_AUDIO_BITSIZE(this->spec.format) > 16) { |
2060 | 130 this->spec.format = AUDIO_S16SYS; /* clamp out int32/float32 ... */ |
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131 } |
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132 |
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133 if (this->spec.channels > 2) { |
2060 | 134 this->spec.channels = 2; /* no more than stereo! */ |
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135 } |
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136 |
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137 /* Check formats available */ |
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138 MINTAUDIO_freqcount = 0; |
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139 for (i = 0; i < 16; i++) { |
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140 SDL_MintAudio_AddFrequency(this, freqs[i], 0, i, -1); |
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141 } |
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142 |
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143 #if 1 |
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144 for (i = 0; i < MINTAUDIO_freqcount; i++) { |
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145 DEBUG_PRINT((DEBUG_NAME "freq %d: %lu Hz, clock %lu, prediv %d\n", |
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146 i, MINTAUDIO_frequencies[i].frequency, |
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147 MINTAUDIO_frequencies[i].masterclock, |
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148 MINTAUDIO_frequencies[i].predivisor)); |
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149 } |
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150 #endif |
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151 |
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152 MINTAUDIO_numfreq = SDL_MintAudio_SearchFrequency(this, this->spec.freq); |
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153 this->spec.freq = MINTAUDIO_frequencies[MINTAUDIO_numfreq].frequency; |
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154 |
2043 | 155 DEBUG_PRINT((DEBUG_NAME "obtained: %d bits, ", |
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156 SDL_AUDIO_BITSIZE(this->spec.format))); |
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157 DEBUG_PRINT(("float=%d, ", SDL_AUDIO_ISFLOAT(this->spec.format))); |
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158 DEBUG_PRINT(("signed=%d, ", SDL_AUDIO_ISSIGNED(this->spec.format))); |
2060 | 159 DEBUG_PRINT(("big endian=%d, ", |
160 SDL_AUDIO_ISBIGENDIAN(this->spec.format))); | |
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161 DEBUG_PRINT(("channels=%d, ", this->spec.channels)); |
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162 DEBUG_PRINT(("freq=%d\n", this->spec.freq)); |
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163 |
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164 return 0; |
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165 } |
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166 |
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167 static void |
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168 MINTSTFA_InitAudio(_THIS) |
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169 { |
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170 void *buffer = SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf]; |
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171 void *oldpile = (void *) Super(0); |
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172 |
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173 /* Stop replay */ |
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174 cookie_stfa->sound_enable = STFA_PLAY_DISABLE; |
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175 |
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176 /* Select replay format */ |
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177 cookie_stfa->sound_control = |
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178 MINTAUDIO_frequencies[MINTAUDIO_numfreq].predivisor; |
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179 if (SDL_AUDIO_BITSIZE(this->spec.format) == 8) { |
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180 cookie_stfa->sound_control |= STFA_FORMAT_8BIT; |
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181 } else { |
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182 cookie_stfa->sound_control |= STFA_FORMAT_16BIT; |
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183 } |
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184 if (this->spec.channels == 2) { |
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185 cookie_stfa->sound_control |= STFA_FORMAT_STEREO; |
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186 } else { |
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187 cookie_stfa->sound_control |= STFA_FORMAT_MONO; |
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188 } |
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189 if (SDL_AUDIO_ISSIGNED(this->spec.format) != 0) { |
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190 cookie_stfa->sound_control |= STFA_FORMAT_SIGNED; |
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191 } else { |
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192 cookie_stfa->sound_control |= STFA_FORMAT_UNSIGNED; |
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193 } |
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194 if (SDL_AUDIO_ISBIGENDIAN(this->spec.format) != 0) { |
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195 cookie_stfa->sound_control |= STFA_FORMAT_BIGENDIAN; |
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196 } else { |
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197 cookie_stfa->sound_control |= STFA_FORMAT_LITENDIAN; |
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198 } |
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199 |
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200 /* Set buffer */ |
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201 cookie_stfa->sound_start = (unsigned long) buffer; |
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202 cookie_stfa->sound_end = (unsigned long) (buffer + this->spec.size); |
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203 |
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204 /* Set interrupt */ |
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205 cookie_stfa->stfa_it = SDL_MintAudio_StfaInterrupt; |
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206 |
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207 /* Restart replay */ |
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208 cookie_stfa->sound_enable = STFA_PLAY_ENABLE | STFA_PLAY_REPEAT; |
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209 |
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210 Super(oldpile); |
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211 |
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212 DEBUG_PRINT((DEBUG_NAME "hardware initialized\n")); |
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213 } |
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214 |
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215 static int |
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216 MINTSTFA_OpenDevice(_THIS, const char *devname, int iscapture) |
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217 { |
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218 SDL_MintAudio_device = this; |
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219 |
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220 /* Check audio capabilities */ |
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221 if (MINTSTFA_CheckAudio(this) == -1) { |
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222 return 0; |
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223 } |
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224 |
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225 /* Initialize all variables that we clean on shutdown */ |
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226 this->hidden = (struct SDL_PrivateAudioData *) |
2060 | 227 SDL_malloc((sizeof *this->hidden)); |
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228 if (this->hidden == NULL) { |
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229 SDL_OutOfMemory(); |
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230 return 0; |
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231 } |
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232 SDL_memset(this->hidden, 0, (sizeof *this->hidden)); |
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233 |
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234 SDL_CalculateAudioSpec(&this->spec); |
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235 |
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236 /* Allocate memory for audio buffers in DMA-able RAM */ |
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237 DEBUG_PRINT((DEBUG_NAME "buffer size=%d\n", this->spec.size)); |
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238 |
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240 Atari_SysMalloc(this->spec.size * 2, MX_STRAM); | |
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241 if (SDL_MintAudio_audiobuf[0] == NULL) { |
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242 SDL_OutOfMemory(); |
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243 SDL_free(this->hidden); |
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244 this->hidden = NULL; |
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245 return 0; |
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246 } |
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247 SDL_MintAudio_audiobuf[1] = SDL_MintAudio_audiobuf[0] + this->spec.size; |
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248 SDL_MintAudio_numbuf = 0; |
2060 | 249 SDL_memset(SDL_MintAudio_audiobuf[0], this->spec.silence, |
250 this->spec.size * 2); | |
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251 SDL_MintAudio_audiosize = this->spec.size; |
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252 SDL_MintAudio_mutex = 0; |
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253 |
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254 DEBUG_PRINT((DEBUG_NAME "buffer 0 at 0x%08x\n", |
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255 SDL_MintAudio_audiobuf[0])); |
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256 DEBUG_PRINT((DEBUG_NAME "buffer 1 at 0x%08x\n", |
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257 SDL_MintAudio_audiobuf[1])); |
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258 |
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259 SDL_MintAudio_CheckFpu(); |
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260 |
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261 /* Setup audio hardware */ |
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262 MINTSTFA_InitAudio(this); |
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263 |
2060 | 264 return 1; /* good to go. */ |
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265 } |
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266 |
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267 |
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268 static int |
2060 | 269 MINTSTFA_Init(SDL_AudioDriverImpl * impl) |
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270 { |
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271 /* Cookie _MCH present ? if not, assume ST machine */ |
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272 if (Getcookie(C__MCH, &cookie_mch) == C_NOTFOUND) { |
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273 cookie_mch = MCH_ST; |
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274 } |
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275 |
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276 /* Cookie _SND present ? if not, assume ST machine */ |
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277 if (Getcookie(C__SND, &cookie_snd) == C_NOTFOUND) { |
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278 cookie_snd = SND_PSG; |
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279 } |
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280 |
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281 /* Cookie STFA present ? */ |
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282 if (Getcookie(C_STFA, (long *) &cookie_stfa) != C_FOUND) { |
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283 SDL_SetError(DEBUG_NAME "no STFA audio"); |
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284 return (0); |
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285 } |
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286 |
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287 SDL_MintAudio_stfa = cookie_stfa; |
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288 |
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289 DEBUG_PRINT((DEBUG_NAME "STFA audio available!\n")); |
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290 |
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291 /* Set the function pointers */ |
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292 impl->OpenDevice = MINTSTFA_OpenDevice; |
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293 impl->CloseDevice = MINTSTFA_CloseDevice; |
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294 impl->LockDevice = MINTSTFA_LockDevice; |
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295 impl->UnlockDevice = MINTSTFA_UnlockDevice; |
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296 impl->OnlyHasDefaultOutputDevice = 1; |
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297 impl->ProvidesOwnCallbackThread = 1; |
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298 impl->SkipMixerLock = 1; |
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299 |
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300 return 1; |
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301 } |
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302 |
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303 AudioBootStrap MINTAUDIO_STFA_bootstrap = { |
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304 MINT_AUDIO_DRIVER_NAME, "MiNT STFA audio driver", MINTSTFA_Init, 0 |
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305 }; |
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306 |
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307 /* vi: set ts=4 sw=4 expandtab: */ |