Mercurial > sdl-ios-xcode
annotate src/audio/mint/SDL_mintaudio_dma8.c @ 3820:1f156fd874fa SDL-ryan-multiple-audio-device
Moved more audio drivers to 1.3 API (all 5 MiNT backends, BSD, IRIX...), and
some other tweaks in already-converted drivers.
author | Ryan C. Gordon <icculus@icculus.org> |
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date | Sat, 07 Oct 2006 05:36:36 +0000 |
parents | c8b3d3d13ed1 |
children | 66fb40445587 |
rev | line source |
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1 /* |
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2 SDL - Simple DirectMedia Layer |
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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 DMA 8bits (hardware access) |
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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_dma8.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_dma8" |
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48 |
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49 /* Debug print info */ |
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50 #define DEBUG_NAME "audio:dma8: " |
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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, cookie_mch; |
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63 |
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64 |
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65 static int |
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66 MINTDMA8_Available(void) |
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67 { |
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68 /* Cookie _MCH present ? if not, assume ST machine */ |
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69 if (Getcookie(C__MCH, &cookie_mch) == C_NOTFOUND) { |
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70 cookie_mch = MCH_ST; |
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71 } |
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72 |
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73 /* Cookie _SND present ? if not, assume ST machine */ |
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74 if (Getcookie(C__SND, &cookie_snd) == C_NOTFOUND) { |
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75 cookie_snd = SND_PSG; |
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76 } |
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77 |
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78 /* Check if we have 8 bits audio */ |
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79 if ((cookie_snd & SND_8BIT) == 0) { |
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80 DEBUG_PRINT((DEBUG_NAME "no 8 bits sound\n")); |
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81 return (0); |
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82 } |
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83 |
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84 /* Check if audio is lockable */ |
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85 if (cookie_snd & SND_16BIT) { |
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86 if (Locksnd() != 1) { |
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87 DEBUG_PRINT((DEBUG_NAME "audio locked by other application\n")); |
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88 return (0); |
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89 } |
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90 |
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91 Unlocksnd(); |
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92 } |
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93 |
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94 DEBUG_PRINT((DEBUG_NAME "8 bits audio available!\n")); |
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95 return (1); |
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96 } |
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97 |
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98 static void |
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99 MINTDMA8_LockDevice(_THIS) |
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100 { |
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101 void *oldpile; |
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102 |
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103 /* Stop replay */ |
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104 oldpile = (void *) Super(0); |
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105 DMAAUDIO_IO.control = 0; |
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106 Super(oldpile); |
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107 } |
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108 |
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109 static void |
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110 MINTDMA8_UnlockDevice(_THIS) |
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111 { |
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112 void *oldpile; |
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113 |
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114 /* Restart replay */ |
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115 oldpile = (void *) Super(0); |
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116 DMAAUDIO_IO.control = 3; |
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117 Super(oldpile); |
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118 } |
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119 |
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120 static void |
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121 MINTDMA8_CloseDevice(_THIS) |
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122 { |
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123 if (this->hidden != NULL) { |
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124 /* Stop replay */ |
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125 void *oldpile = (void *) Super(0); |
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126 |
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127 DMAAUDIO_IO.control = 0; |
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128 Super(oldpile); |
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129 |
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130 DEBUG_PRINT((DEBUG_NAME "closeaudio: replay stopped\n")); |
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131 |
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132 /* Disable interrupt */ |
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133 Jdisint(MFP_DMASOUND); |
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134 |
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135 DEBUG_PRINT((DEBUG_NAME "closeaudio: interrupt disabled\n")); |
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136 |
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137 /* Wait if currently playing sound */ |
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138 while (SDL_MintAudio_mutex != 0) {} |
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139 |
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140 DEBUG_PRINT((DEBUG_NAME "closeaudio: no more interrupt running\n")); |
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141 |
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142 /* Clear buffers */ |
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143 if (SDL_MintAudio_audiobuf[0]) { |
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144 Mfree(SDL_MintAudio_audiobuf[0]); |
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145 SDL_MintAudio_audiobuf[0] = SDL_MintAudio_audiobuf[1] = NULL; |
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146 } |
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147 |
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148 DEBUG_PRINT((DEBUG_NAME "closeaudio: buffers freed\n")); |
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149 SDL_free(this->buffer); |
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150 this->buffer = NULL; |
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151 } |
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152 } |
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153 |
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154 static int |
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155 MINTDMA8_CheckAudio(_THIS) |
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156 { |
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157 int i, masterprediv, sfreq; |
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158 unsigned long masterclock; |
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159 |
2043 | 160 DEBUG_PRINT((DEBUG_NAME "asked: %d bits, ", |
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161 SDL_AUDIO_BITSIZE(this->spec.format))); |
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162 DEBUG_PRINT(("float=%d, ", SDL_AUDIO_ISFLOAT(this->spec.format))); |
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163 DEBUG_PRINT(("signed=%d, ", SDL_AUDIO_ISSIGNED(this->spec.format))); |
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164 DEBUG_PRINT(("big endian=%d, ", SDL_AUDIO_ISBIGENDIAN(this->spec.format))); |
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165 DEBUG_PRINT(("channels=%d, ", this->spec.channels)); |
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166 DEBUG_PRINT(("freq=%d\n", this->spec.freq)); |
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167 |
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168 if (this->spec.channels > 2) { |
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169 this->spec.channels = 2; /* no more than stereo! */ |
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170 } |
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171 |
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172 /* Check formats available */ |
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173 this->spec.format = AUDIO_S8; |
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174 |
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175 /* Calculate and select the closest frequency */ |
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176 sfreq = 0; |
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177 masterclock = MASTERCLOCK_STE; |
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178 masterprediv = MASTERPREDIV_STE; |
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179 switch (cookie_mch >> 16) { |
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180 /* |
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181 case MCH_STE: |
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182 masterclock=MASTERCLOCK_STE; |
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183 masterprediv=MASTERPREDIV_STE; |
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184 break; |
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185 */ |
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186 case MCH_TT: |
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187 masterclock = MASTERCLOCK_TT; |
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188 masterprediv = MASTERPREDIV_TT; |
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189 break; |
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190 case MCH_F30: |
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191 case MCH_ARANYM: |
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192 masterclock = MASTERCLOCK_FALCON1; |
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193 masterprediv = MASTERPREDIV_FALCON; |
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194 sfreq = 1; |
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195 break; |
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196 } |
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197 |
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198 MINTAUDIO_freqcount = 0; |
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199 for (i = sfreq; i < 4; i++) { |
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200 SDL_MintAudio_AddFrequency(this, |
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201 masterclock / (masterprediv * (1 << i)), |
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202 masterclock, i - sfreq, -1); |
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203 } |
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204 |
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205 #if 1 |
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206 for (i = 0; i < MINTAUDIO_freqcount; i++) { |
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207 DEBUG_PRINT((DEBUG_NAME "freq %d: %lu Hz, clock %lu, prediv %d\n", |
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208 i, MINTAUDIO_frequencies[i].frequency, |
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209 MINTAUDIO_frequencies[i].masterclock, |
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210 MINTAUDIO_frequencies[i].predivisor)); |
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211 } |
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212 #endif |
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213 |
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214 MINTAUDIO_numfreq = SDL_MintAudio_SearchFrequency(this, this->spec.freq); |
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215 this->spec.freq = MINTAUDIO_frequencies[MINTAUDIO_numfreq].frequency; |
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216 |
2043 | 217 DEBUG_PRINT((DEBUG_NAME "obtained: %d bits, ", |
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218 SDL_AUDIO_BITSIZE(this->spec.format))); |
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219 DEBUG_PRINT(("float=%d, ", SDL_AUDIO_ISFLOAT(this->spec.format))); |
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220 DEBUG_PRINT(("signed=%d, ", SDL_AUDIO_ISSIGNED(this->spec.format))); |
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221 DEBUG_PRINT(("big endian=%d, ", SDL_AUDIO_ISBIGENDIAN(this->spec.format))); |
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222 DEBUG_PRINT(("channels=%d, ", this->spec.channels)); |
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223 DEBUG_PRINT(("freq=%d\n", this->spec.freq)); |
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224 |
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225 return 0; |
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226 } |
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227 |
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228 static void |
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229 MINTDMA8_InitAudio(_THIS) |
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230 { |
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231 void *oldpile; |
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232 unsigned long buffer; |
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233 unsigned char mode; |
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234 |
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235 /* Set replay tracks */ |
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236 if (cookie_snd & SND_16BIT) { |
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237 Settracks(0, 0); |
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238 Setmontracks(0); |
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239 } |
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240 |
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241 oldpile = (void *) Super(0); |
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242 |
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243 /* Stop currently playing sound */ |
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244 DMAAUDIO_IO.control = 0; |
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245 |
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246 /* Set buffer */ |
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247 buffer = (unsigned long) SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf]; |
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248 DMAAUDIO_IO.start_high = (buffer >> 16) & 255; |
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249 DMAAUDIO_IO.start_mid = (buffer >> 8) & 255; |
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250 DMAAUDIO_IO.start_low = buffer & 255; |
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251 |
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252 buffer += SDL_MintAudio_audiosize; |
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253 DMAAUDIO_IO.end_high = (buffer >> 16) & 255; |
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254 DMAAUDIO_IO.end_mid = (buffer >> 8) & 255; |
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255 DMAAUDIO_IO.end_low = buffer & 255; |
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256 |
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257 mode = 3 - MINTAUDIO_frequencies[MINTAUDIO_numfreq].predivisor; |
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258 if (this->spec.channels == 1) { |
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259 mode |= 1 << 7; |
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260 } |
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261 DMAAUDIO_IO.sound_ctrl = mode; |
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262 |
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263 /* Set interrupt */ |
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264 Jdisint(MFP_DMASOUND); |
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265 Xbtimer(XB_TIMERA, 8, 1, SDL_MintAudio_Dma8Interrupt); |
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266 Jenabint(MFP_DMASOUND); |
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267 |
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268 if (cookie_snd & SND_16BIT) { |
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269 if (Setinterrupt(SI_TIMERA, SI_PLAY) < 0) { |
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270 DEBUG_PRINT((DEBUG_NAME "Setinterrupt() failed\n")); |
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271 } |
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272 } |
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273 |
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274 /* Go */ |
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275 DMAAUDIO_IO.control = 3; /* playback + repeat */ |
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276 |
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277 Super(oldpile); |
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278 } |
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279 |
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280 static int |
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281 MINTDMA8_OpenDevice(_THIS, const char *devname, int iscapture) |
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282 { |
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283 SDL_MintAudio_device = this; |
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284 |
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285 /* Check audio capabilities */ |
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286 if (MINTDMA8_CheckAudio(this) == -1) { |
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287 return 0; |
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288 } |
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289 |
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290 /* Initialize all variables that we clean on shutdown */ |
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291 this->hidden = (struct SDL_PrivateAudioData *) |
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292 SDL_malloc((sizeof *this->hidden)); |
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293 if (this->hidden == NULL) { |
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294 SDL_OutOfMemory(); |
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295 return 0; |
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296 } |
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297 SDL_memset(this->hidden, 0, (sizeof *this->hidden)); |
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298 |
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299 SDL_CalculateAudioSpec(&this->spec); |
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300 |
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301 /* Allocate memory for audio buffers in DMA-able RAM */ |
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302 DEBUG_PRINT((DEBUG_NAME "buffer size=%d\n", this->spec.size)); |
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303 |
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304 SDL_MintAudio_audiobuf[0] = Atari_SysMalloc(this->spec.size * 2, MX_STRAM); |
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305 if (SDL_MintAudio_audiobuf[0] == NULL) { |
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306 SDL_free(this->hidden); |
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307 this->hidden = NULL; |
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308 SDL_OutOfMemory(); |
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309 return 0; |
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310 } |
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311 SDL_MintAudio_audiobuf[1] = SDL_MintAudio_audiobuf[0] + this->spec.size; |
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312 SDL_MintAudio_numbuf = 0; |
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313 SDL_memset(SDL_MintAudio_audiobuf[0],this->spec.silence,this->spec.size*2); |
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314 SDL_MintAudio_audiosize = this->spec.size; |
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315 SDL_MintAudio_mutex = 0; |
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316 |
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317 DEBUG_PRINT((DEBUG_NAME "buffer 0 at 0x%08x\n", |
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318 SDL_MintAudio_audiobuf[0])); |
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319 DEBUG_PRINT((DEBUG_NAME "buffer 1 at 0x%08x\n", |
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320 SDL_MintAudio_audiobuf[1])); |
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321 |
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322 SDL_MintAudio_CheckFpu(); |
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323 |
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324 /* Setup audio hardware */ |
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325 MINTDMA8_InitAudio(this); |
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326 |
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327 return 1; /* good to go. */ |
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328 } |
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329 |
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330 static int |
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331 MINTDMA8_Init(SDL_AudioDriverImpl *impl) |
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332 { |
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333 /* Set the function pointers */ |
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334 impl->OpenDevice = MINTDMA8_OpenDevice; |
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335 impl->CloseDevice = MINTDMA8_CloseDevice; |
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parents:
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336 impl->LockAudio = MINTDMA8_LockAudio; |
1f156fd874fa
Moved more audio drivers to 1.3 API (all 5 MiNT backends, BSD, IRIX...), and
Ryan C. Gordon <icculus@icculus.org>
parents:
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337 impl->UnlockAudio = MINTDMA8_UnlockAudio; |
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Moved more audio drivers to 1.3 API (all 5 MiNT backends, BSD, IRIX...), and
Ryan C. Gordon <icculus@icculus.org>
parents:
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338 impl->OnlyHasDefaultOutputDevice = 1; |
1f156fd874fa
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parents:
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339 impl->ProvidesOwnCallbackThread = 1; |
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Moved more audio drivers to 1.3 API (all 5 MiNT backends, BSD, IRIX...), and
Ryan C. Gordon <icculus@icculus.org>
parents:
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340 impl->SkipMixerLock = 1; |
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Moved more audio drivers to 1.3 API (all 5 MiNT backends, BSD, IRIX...), and
Ryan C. Gordon <icculus@icculus.org>
parents:
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341 |
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342 return 1; |
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Ryan C. Gordon <icculus@icculus.org>
parents:
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343 } |
1f156fd874fa
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Ryan C. Gordon <icculus@icculus.org>
parents:
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344 |
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Ryan C. Gordon <icculus@icculus.org>
parents:
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345 AudioBootStrap MINTAUDIO_DMA8_bootstrap = { |
1f156fd874fa
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Ryan C. Gordon <icculus@icculus.org>
parents:
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346 MINT_AUDIO_DRIVER_NAME, "MiNT DMA 8 bits audio driver", |
1f156fd874fa
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parents:
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347 MINTDMA8_Available, MINTDMA8_Init, 0 |
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parents:
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348 }; |
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349 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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350 /* vi: set ts=4 sw=4 expandtab: */ |