Mercurial > sdl-ios-xcode

annotate src/audio/mint/SDL_mintaudio_mcsn.c @ 3842:6b04ca2f1016 SDL-ryan-multiple-audio-device

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Moved DirectSound audio target to SDL 1.3 API and did some house cleaning.
author Ryan C. Gordon <icculus@icculus.org>
date Tue, 17 Oct 2006 06:37:42 +0000
parents 1f156fd874fa
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 XBIOS functions (MacSound compatible 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 #include <support.h>
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32
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33 /* Mint includes */
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34 #include <mint/osbind.h>
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35 #include <mint/falcon.h>
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36 #include <mint/cookie.h>
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37
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38 #include "SDL_audio.h"
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39 #include "../SDL_audio_c.h"
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40 #include "../SDL_sysaudio.h"
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41
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42 #include "../../video/ataricommon/SDL_atarimxalloc_c.h"
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43
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44 #include "SDL_mintaudio.h"
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45 #include "SDL_mintaudio_mcsn.h"
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46
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47 /*--- Defines ---*/
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48
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49 #define MINT_AUDIO_DRIVER_NAME "mint_mcsn"
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50
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51 /* Debug print info */
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52 #define DEBUG_NAME "audio:mcsn: "
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53 #if 0
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54 #define DEBUG_PRINT(what) \
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55 { \
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56 printf what; \
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57 }
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58 #else
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59 #define DEBUG_PRINT(what)
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60 #endif
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61
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62 /*--- Static variables ---*/
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63
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64 static unsigned long cookie_snd = 0;
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65 static unsigned long cookie_mch = 0;
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66 static cookie_mcsn_t *cookie_mcsn = NULL;
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67
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68 static int
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69 MINTMCSN_Available(void)
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70 {
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71 unsigned long dummy = 0;
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72
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73 SDL_MintAudio_mint_present = (Getcookie(C_MiNT, &dummy) == C_FOUND);
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74
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75 /* We can't use XBIOS in interrupt with Magic, don't know about thread */
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76 if (Getcookie(C_MagX, &dummy) == C_FOUND) {
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77 return (0);
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78 }
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79
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80 /* Cookie _MCH present ? if not, assume ST machine */
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81 if (Getcookie(C__MCH, &cookie_mch) == C_NOTFOUND) {
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82 cookie_mch = MCH_ST;
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83 }
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84
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85 /* Cookie _SND present ? if not, assume ST machine */
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86 if (Getcookie(C__SND, &cookie_snd) == C_NOTFOUND) {
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87 cookie_snd = SND_PSG;
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88 }
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89
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90 /* Check if we have 16 bits audio */
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91 if ((cookie_snd & SND_16BIT) == 0) {
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92 DEBUG_PRINT((DEBUG_NAME "no 16 bits sound\n"));
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93 return (0);
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94 }
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95
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96 /* Cookie MCSN present ? */
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97 if (Getcookie(C_McSn, (long *) &cookie_mcsn) != C_FOUND) {
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98 DEBUG_PRINT((DEBUG_NAME "no MCSN audio\n"));
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99 return (0);
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100 }
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101
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102 /* Check if interrupt at end of replay */
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103 if (cookie_mcsn->pint == 0) {
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104 DEBUG_PRINT((DEBUG_NAME "no interrupt at end of replay\n"));
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105 return (0);
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106 }
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107
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108 /* Check if audio is lockable */
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109 if (Locksnd() != 1) {
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110 DEBUG_PRINT((DEBUG_NAME "audio locked by other application\n"));
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111 return (0);
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112 }
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113
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114 Unlocksnd();
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115
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116 DEBUG_PRINT((DEBUG_NAME "MCSN audio available!\n"));
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117 return (1);
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118 }
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119
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120 static void
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121 MINTMCSN_LockDevice(_THIS)
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122 {
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123 /* Stop replay */
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124 Buffoper(0);
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125 }
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126
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127 static void
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128 MINTMCSN_UnlockDevice(_THIS)
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129 {
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130 /* Restart replay */
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131 Buffoper(SB_PLA_ENA | SB_PLA_RPT);
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132 }
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133
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134 static void
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135 MINTMCSN_CloseDevice(_THIS)
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136 {
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137 if (this->hidden != NULL) {
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138 /* Stop replay */
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139 SDL_MintAudio_WaitThread();
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140 Buffoper(0);
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141
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142 if (!SDL_MintAudio_mint_present) {
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143 /* Uninstall interrupt */
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144 Jdisint(MFP_DMASOUND);
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145 }
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146
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147 /* Wait if currently playing sound */
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148 while (SDL_MintAudio_mutex != 0) {}
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149
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150 /* Clear buffers */
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151 if (SDL_MintAudio_audiobuf[0]) {
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152 Mfree(SDL_MintAudio_audiobuf[0]);
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153 SDL_MintAudio_audiobuf[0] = SDL_MintAudio_audiobuf[1] = NULL;
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154 }
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diff changeset
155
1f156fd874fa Moved more audio drivers to 1.3 API (all 5 MiNT backends, BSD, IRIX...), and
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156 /* Unlock sound system */
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157 Unlocksnd();
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158
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159 SDL_free(this->hidden);
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160 this->hidden = NULL;
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161 }
644
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162 }
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163
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164 static int
3820
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165 MINTMCSN_CheckAudio(_THIS)
644
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166 {
1895
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167 int i;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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168 unsigned long masterclock, masterprediv;
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169
2043
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170 DEBUG_PRINT((DEBUG_NAME "asked: %d bits, ",
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171 SDL_AUDIO_BITSIZE(this->spec.format)));
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172 DEBUG_PRINT(("float=%d, ", SDL_AUDIO_ISFLOAT(this->spec.format)));
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173 DEBUG_PRINT(("signed=%d, ", SDL_AUDIO_ISSIGNED(this->spec.format)));
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174 DEBUG_PRINT(("big endian=%d, ", SDL_AUDIO_ISBIGENDIAN(this->spec.format)));
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175 DEBUG_PRINT(("channels=%d, ", this->spec.channels));
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176 DEBUG_PRINT(("freq=%d\n", this->spec.freq));
644
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177
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178 if (this->spec.channels > 2) {
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179 this->spec.channels = 2; /* no more than stereo! */
2005
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
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180 }
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diff changeset
181
1895
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182 /* Check formats available */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
183 MINTAUDIO_freqcount = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
184 switch (cookie_mcsn->play) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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185 case MCSN_ST:
3820
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186 this->spec.channels = 1;
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187 this->spec.format = AUDIO_S8; /* FIXME: is it signed or unsigned ? */
1895
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188 SDL_MintAudio_AddFrequency(this, 12500, 0, 0, -1);
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189 break;
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diff changeset
190 case MCSN_TT: /* Also STE, Mega STE */
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191 this->spec.format = AUDIO_S8;
1895
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diff changeset
192 masterclock = MASTERCLOCK_STE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
193 masterprediv = MASTERPREDIV_STE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
194 if ((cookie_mch >> 16) == MCH_TT) {
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195 masterclock = MASTERCLOCK_TT;
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196 masterprediv = MASTERPREDIV_TT;
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197 }
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diff changeset
198 for (i = 0; i < 4; i++) {
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199 SDL_MintAudio_AddFrequency(this,
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200 masterclock / (masterprediv *
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
201 (1 << i)),
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diff changeset
202 masterclock, 3 - i, -1);
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203 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
204 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
205 case MCSN_FALCON: /* Also Mac */
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diff changeset
206 for (i = 1; i < 12; i++) {
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207 /* Remove unusable Falcon codec predivisors */
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diff changeset
208 if ((i == 6) || (i == 8) || (i == 10)) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
209 continue;
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diff changeset
210 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
211 SDL_MintAudio_AddFrequency(this,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
212 MASTERCLOCK_FALCON1 /
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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213 (MASTERPREDIV_FALCON * (i + 1)),
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diff changeset
214 CLK25M, i + 1, -1);
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diff changeset
215 }
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diff changeset
216 if (cookie_mcsn->res1 != 0) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
217 for (i = 1; i < 4; i++) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
218 SDL_MintAudio_AddFrequency(this,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
219 (cookie_mcsn->res1) /
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diff changeset
220 (MASTERPREDIV_FALCON *
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
221 (1 << i)), CLKEXT,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
222 (1 << i) - 1, -1);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
223 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
224 }
3820
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225 this->spec.format |= SDL_AUDIO_MASK_SIGNED; /* Audio is always signed */
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226 if ((SDL_AUDIO_BITSIZE(this->spec.format)) == 16) {
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227 this->spec.format |= SDL_AUDIO_MASK_ENDIAN; /* Audio is always big endian */
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228 this->spec.channels = 2; /* 16 bits always stereo */
1895
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229 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
230 break;
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diff changeset
231 }
644
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232
961
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diff changeset
233 #if 1
1895
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diff changeset
234 for (i = 0; i < MINTAUDIO_freqcount; i++) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
235 DEBUG_PRINT((DEBUG_NAME "freq %d: %lu Hz, clock %lu, prediv %d\n",
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
236 i, MINTAUDIO_frequencies[i].frequency,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
237 MINTAUDIO_frequencies[i].masterclock,
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diff changeset
238 MINTAUDIO_frequencies[i].predivisor));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
239 }
961
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diff changeset
240 #endif
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
241
3820
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242 MINTAUDIO_numfreq = SDL_MintAudio_SearchFrequency(this, this->spec.freq);
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diff changeset
243 this->spec.freq = MINTAUDIO_frequencies[MINTAUDIO_numfreq].frequency;
644
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244
2043
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diff changeset
245 DEBUG_PRINT((DEBUG_NAME "obtained: %d bits, ",
3820
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diff changeset
246 SDL_AUDIO_BITSIZE(this->spec.format)));
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diff changeset
247 DEBUG_PRINT(("float=%d, ", SDL_AUDIO_ISFLOAT(this->spec.format)));
1f156fd874fa Moved more audio drivers to 1.3 API (all 5 MiNT backends, BSD, IRIX...), and
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diff changeset
248 DEBUG_PRINT(("signed=%d, ", SDL_AUDIO_ISSIGNED(this->spec.format)));
1f156fd874fa Moved more audio drivers to 1.3 API (all 5 MiNT backends, BSD, IRIX...), and
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diff changeset
249 DEBUG_PRINT(("big endian=%d, ", SDL_AUDIO_ISBIGENDIAN(this->spec.format)));
1f156fd874fa Moved more audio drivers to 1.3 API (all 5 MiNT backends, BSD, IRIX...), and
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diff changeset
250 DEBUG_PRINT(("channels=%d, ", this->spec.channels));
1f156fd874fa Moved more audio drivers to 1.3 API (all 5 MiNT backends, BSD, IRIX...), and
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diff changeset
251 DEBUG_PRINT(("freq=%d\n", this->spec.freq));
644
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252
1895
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diff changeset
253 return 0;
644
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diff changeset
254 }
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diff changeset
255
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diff changeset
256 static void
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257 MINTMCSN_InitAudio(_THIS)
644
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diff changeset
258 {
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diff changeset
259 int channels_mode, prediv, dmaclock;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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260 void *buffer;
644
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261
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262 /* Stop currently playing sound */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
263 SDL_MintAudio_quit_thread = SDL_FALSE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
264 SDL_MintAudio_thread_finished = SDL_TRUE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
265 SDL_MintAudio_WaitThread();
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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266 Buffoper(0);
644
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diff changeset
267
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diff changeset
268 /* Set replay tracks */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
269 Settracks(0, 0);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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270 Setmontracks(0);
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271
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
272 /* Select replay format */
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273 channels_mode = STEREO16;
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274 switch (SDL_AUDIO_BITSIZE(this->spec.format)) {
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275 case 8:
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276 if (this->spec.channels == 2) {
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277 channels_mode = STEREO8;
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278 } else {
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279 channels_mode = MONO8;
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280 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
281 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
282 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
283 if (Setmode(channels_mode) < 0) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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284 DEBUG_PRINT((DEBUG_NAME "Setmode() failed\n"));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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285 }
644
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286
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diff changeset
287 dmaclock = MINTAUDIO_frequencies[MINTAUDIO_numfreq].masterclock;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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288 prediv = MINTAUDIO_frequencies[MINTAUDIO_numfreq].predivisor;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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289 switch (cookie_mcsn->play) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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290 case MCSN_TT:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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291 Devconnect(DMAPLAY, DAC, CLK25M, CLKOLD, 1);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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292 Soundcmd(SETPRESCALE, prediv);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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293 DEBUG_PRINT((DEBUG_NAME "STE/TT prescaler selected\n"));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
294 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
295 case MCSN_FALCON:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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296 Devconnect(DMAPLAY, DAC, dmaclock, prediv, 1);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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297 DEBUG_PRINT((DEBUG_NAME "Falcon prescaler selected\n"));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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298 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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299 }
644
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300
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
301 /* Set buffer */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
302 buffer = SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf];
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303 if (Setbuffer(0, buffer, buffer + this->spec.size) < 0) {
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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304 DEBUG_PRINT((DEBUG_NAME "Setbuffer() failed\n"));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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305 }
644
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306
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
307 if (SDL_MintAudio_mint_present) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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308 SDL_MintAudio_thread_pid = tfork(SDL_MintAudio_Thread, 0);
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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diff changeset
309 } else {
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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diff changeset
310 /* Install interrupt */
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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diff changeset
311 Jdisint(MFP_DMASOUND);
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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diff changeset
312 Xbtimer(XB_TIMERA, 8, 1, SDL_MintAudio_XbiosInterrupt);
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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diff changeset
313 Jenabint(MFP_DMASOUND);
644
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diff changeset
314
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
315 if (Setinterrupt(SI_TIMERA, SI_PLAY) < 0) {
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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diff changeset
316 DEBUG_PRINT((DEBUG_NAME "Setinterrupt() failed\n"));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
317 }
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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diff changeset
318 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
319
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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diff changeset
320 /* Go */
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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diff changeset
321 Buffoper(SB_PLA_ENA | SB_PLA_RPT);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
322 DEBUG_PRINT((DEBUG_NAME "hardware initialized\n"));
644
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diff changeset
323 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
324
1895
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diff changeset
325 static int
3820
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diff changeset
326 MINTMCSN_OpenDevice(_THIS, const char *devname, int iscapture)
644
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
327 {
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
328 /* Lock sound system */
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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diff changeset
329 if (Locksnd() != 1) {
3820
1f156fd874fa Moved more audio drivers to 1.3 API (all 5 MiNT backends, BSD, IRIX...), and
Ryan C. Gordon <icculus@icculus.org>
parents: 3798
diff changeset
330 SDL_SetError("MINTMCSN_OpenDevice: Audio system already in use");
1f156fd874fa Moved more audio drivers to 1.3 API (all 5 MiNT backends, BSD, IRIX...), and
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diff changeset
331 return 0;
1895
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diff changeset
332 }
644
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parents:
diff changeset
333
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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diff changeset
334 SDL_MintAudio_device = this;
644
594422ab8f9f Atari MiNT: added more audio drivers
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diff changeset
335
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
336 /* Check audio capabilities */
3820
1f156fd874fa Moved more audio drivers to 1.3 API (all 5 MiNT backends, BSD, IRIX...), and
Ryan C. Gordon <icculus@icculus.org>
parents: 3798
diff changeset
337 if (MINTMCSN_CheckAudio(this) == -1) {
1f156fd874fa Moved more audio drivers to 1.3 API (all 5 MiNT backends, BSD, IRIX...), and
Ryan C. Gordon <icculus@icculus.org>
parents: 3798
diff changeset
338 return 0;
1895
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diff changeset
339 }
644
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parents:
diff changeset
340
3820
1f156fd874fa Moved more audio drivers to 1.3 API (all 5 MiNT backends, BSD, IRIX...), and
Ryan C. Gordon <icculus@icculus.org>
parents: 3798
diff changeset
341 /* Initialize all variables that we clean on shutdown */
1f156fd874fa Moved more audio drivers to 1.3 API (all 5 MiNT backends, BSD, IRIX...), and
Ryan C. Gordon <icculus@icculus.org>
parents: 3798
diff changeset
342 this->hidden = (struct SDL_PrivateAudioData *)
1f156fd874fa Moved more audio drivers to 1.3 API (all 5 MiNT backends, BSD, IRIX...), and
Ryan C. Gordon <icculus@icculus.org>
parents: 3798
diff changeset
343 SDL_malloc((sizeof *this->hidden));
1f156fd874fa Moved more audio drivers to 1.3 API (all 5 MiNT backends, BSD, IRIX...), and
Ryan C. Gordon <icculus@icculus.org>
parents: 3798
diff changeset
344 if (this->hidden == NULL) {
1f156fd874fa Moved more audio drivers to 1.3 API (all 5 MiNT backends, BSD, IRIX...), and
Ryan C. Gordon <icculus@icculus.org>
parents: 3798
diff changeset
345 SDL_OutOfMemory();
1f156fd874fa Moved more audio drivers to 1.3 API (all 5 MiNT backends, BSD, IRIX...), and
Ryan C. Gordon <icculus@icculus.org>
parents: 3798
diff changeset
346 return 0;
1f156fd874fa Moved more audio drivers to 1.3 API (all 5 MiNT backends, BSD, IRIX...), and
Ryan C. Gordon <icculus@icculus.org>
parents: 3798
diff changeset
347 }
1f156fd874fa Moved more audio drivers to 1.3 API (all 5 MiNT backends, BSD, IRIX...), and
Ryan C. Gordon <icculus@icculus.org>
parents: 3798
diff changeset
348 SDL_memset(this->hidden, 0, (sizeof *this->hidden));
1f156fd874fa Moved more audio drivers to 1.3 API (all 5 MiNT backends, BSD, IRIX...), and
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parents: 3798
diff changeset
349
1f156fd874fa Moved more audio drivers to 1.3 API (all 5 MiNT backends, BSD, IRIX...), and
Ryan C. Gordon <icculus@icculus.org>
parents: 3798
diff changeset
350 SDL_CalculateAudioSpec(&this->spec);
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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diff changeset
351
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
352 /* Allocate memory for audio buffers in DMA-able RAM */
3820
1f156fd874fa Moved more audio drivers to 1.3 API (all 5 MiNT backends, BSD, IRIX...), and
Ryan C. Gordon <icculus@icculus.org>
parents: 3798
diff changeset
353 DEBUG_PRINT((DEBUG_NAME "buffer size=%d\n", this->spec.size));
644
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
354
3820
1f156fd874fa Moved more audio drivers to 1.3 API (all 5 MiNT backends, BSD, IRIX...), and
Ryan C. Gordon <icculus@icculus.org>
parents: 3798
diff changeset
355 SDL_MintAudio_audiobuf[0] = Atari_SysMalloc(this->spec.size * 2, MX_STRAM);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
356 if (SDL_MintAudio_audiobuf[0] == NULL) {
3820
1f156fd874fa Moved more audio drivers to 1.3 API (all 5 MiNT backends, BSD, IRIX...), and
Ryan C. Gordon <icculus@icculus.org>
parents: 3798
diff changeset
357 SDL_free(this->hidden);
1f156fd874fa Moved more audio drivers to 1.3 API (all 5 MiNT backends, BSD, IRIX...), and
Ryan C. Gordon <icculus@icculus.org>
parents: 3798
diff changeset
358 this->hidden = NULL;
1f156fd874fa Moved more audio drivers to 1.3 API (all 5 MiNT backends, BSD, IRIX...), and
Ryan C. Gordon <icculus@icculus.org>
parents: 3798
diff changeset
359 SDL_OutOfMemory();
1f156fd874fa Moved more audio drivers to 1.3 API (all 5 MiNT backends, BSD, IRIX...), and
Ryan C. Gordon <icculus@icculus.org>
parents: 3798
diff changeset
360 return 0;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
361 }
3820
1f156fd874fa Moved more audio drivers to 1.3 API (all 5 MiNT backends, BSD, IRIX...), and
Ryan C. Gordon <icculus@icculus.org>
parents: 3798
diff changeset
362 SDL_MintAudio_audiobuf[1] = SDL_MintAudio_audiobuf[0] + this->spec.size;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
363 SDL_MintAudio_numbuf = 0;
3820
1f156fd874fa Moved more audio drivers to 1.3 API (all 5 MiNT backends, BSD, IRIX...), and
Ryan C. Gordon <icculus@icculus.org>
parents: 3798
diff changeset
364 SDL_memset(SDL_MintAudio_audiobuf[0],this->spec.silence,this->spec.size*2);
1f156fd874fa Moved more audio drivers to 1.3 API (all 5 MiNT backends, BSD, IRIX...), and
Ryan C. Gordon <icculus@icculus.org>
parents: 3798
diff changeset
365 SDL_MintAudio_audiosize = this->spec.size;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
366 SDL_MintAudio_mutex = 0;
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
367
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
368 DEBUG_PRINT((DEBUG_NAME "buffer 0 at 0x%08x\n",
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
369 SDL_MintAudio_audiobuf[0]));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
370 DEBUG_PRINT((DEBUG_NAME "buffer 1 at 0x%08x\n",
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
371 SDL_MintAudio_audiobuf[1]));
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
372
2027
d48ead2d2ba5 Save/restore FPU registers in interrupt
Patrice Mandin <patmandin@gmail.com>
parents: 2005
diff changeset
373 SDL_MintAudio_CheckFpu();
d48ead2d2ba5 Save/restore FPU registers in interrupt
Patrice Mandin <patmandin@gmail.com>
parents: 2005
diff changeset
374
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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diff changeset
375 /* Setup audio hardware */
3820
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376 MINTMCSN_InitAudio(this);
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377
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378 return 1; /* good to go. */
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379 }
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380
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381 static int
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382 MINTMCSN_Init(SDL_AudioDriverImpl *impl)
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383 {
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384 /* Set the function pointers */
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385 impl->OpenDevice = MINTMCSN_OpenDevice;
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386 impl->CloseDevice = MINTMCSN_CloseDevice;
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387 impl->LockAudio = MINTMCSN_LockAudio;
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388 impl->UnlockAudio = MINTMCSN_UnlockAudio;
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389 impl->OnlyHasDefaultOutputDevice = 1;
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390 impl->ProvidesOwnCallbackThread = 1;
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391 impl->SkipMixerLock = 1;
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392
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393 return 1;
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394 }
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395
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396 AudioBootStrap MINTAUDIO_MCSN_bootstrap = {
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397 MINT_AUDIO_DRIVER_NAME, "MiNT MCSN audio driver",
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398 MINTMCSN_Available, MINTMCSN_Init, 0
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399 };
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400
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401 /* vi: set ts=4 sw=4 expandtab: */