Mercurial > sdl-ios-xcode

annotate src/audio/mint/SDL_mintaudio_mcsn.c @ 3950:9d9e15ab1697 SDL-1.2

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Check if yasm supports a nasm-specific syntax we use (it doesn't in 0.5.0, which is still common in Linux distros, and does in 0.6.0). Disable it if we don't, attempting to fallback to using nasm. Thanks to Mike Frysinger for the patch. Fixes Bugzilla #393.
author Ryan C. Gordon <icculus@icculus.org>
date Mon, 04 Jun 2007 11:06:48 +0000
parents e958a003b69b
children a1b03ba2fcd0
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, cookie_mch;
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65 static cookie_mcsn_t *cookie_mcsn;
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66
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67 /*--- Audio driver functions ---*/
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68
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69 static void Mint_CloseAudio(_THIS);
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70 static int Mint_OpenAudio(_THIS, SDL_AudioSpec *spec);
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71 static void Mint_LockAudio(_THIS);
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72 static void Mint_UnlockAudio(_THIS);
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73
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74 /* To check/init hardware audio */
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75 static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec);
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76 static void Mint_InitAudio(_THIS, SDL_AudioSpec *spec);
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77
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78 /*--- Audio driver bootstrap functions ---*/
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79
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80 static int Audio_Available(void)
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81 {
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82 unsigned long dummy;
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83 const char *envr = SDL_getenv("SDL_AUDIODRIVER");
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84
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85 SDL_MintAudio_mint_present = (Getcookie(C_MiNT, &dummy) == C_FOUND);
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86
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87 /* We can't use XBIOS in interrupt with Magic, don't know about thread */
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88 if (Getcookie(C_MagX, &dummy) == C_FOUND) {
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89 return(0);
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90 }
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91
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92 /* Check if user asked a different audio driver */
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93 if ((envr) && (SDL_strcmp(envr, MINT_AUDIO_DRIVER_NAME)!=0)) {
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94 DEBUG_PRINT((DEBUG_NAME "user asked a different audio driver\n"));
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95 return(0);
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96 }
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97
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98 /* Cookie _MCH present ? if not, assume ST machine */
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99 if (Getcookie(C__MCH, &cookie_mch) == C_NOTFOUND) {
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100 cookie_mch = MCH_ST;
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101 }
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102
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103 /* Cookie _SND present ? if not, assume ST machine */
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104 if (Getcookie(C__SND, &cookie_snd) == C_NOTFOUND) {
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105 cookie_snd = SND_PSG;
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106 }
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107
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108 /* Check if we have 16 bits audio */
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109 if ((cookie_snd & SND_16BIT)==0) {
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110 DEBUG_PRINT((DEBUG_NAME "no 16 bits sound\n"));
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111 return(0);
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112 }
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113
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114 /* Cookie MCSN present ? */
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115 if (Getcookie(C_McSn, (long *) &cookie_mcsn) != C_FOUND) {
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116 DEBUG_PRINT((DEBUG_NAME "no MCSN audio\n"));
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117 return(0);
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118 }
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119
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120 /* Check if interrupt at end of replay */
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121 if (cookie_mcsn->pint == 0) {
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122 DEBUG_PRINT((DEBUG_NAME "no interrupt at end of replay\n"));
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123 return(0);
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124 }
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125
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126 /* Check if audio is lockable */
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127 if (Locksnd()!=1) {
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128 DEBUG_PRINT((DEBUG_NAME "audio locked by other application\n"));
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129 return(0);
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130 }
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131
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132 Unlocksnd();
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133
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134 DEBUG_PRINT((DEBUG_NAME "MCSN audio available!\n"));
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135 return(1);
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136 }
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137
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138 static void Audio_DeleteDevice(SDL_AudioDevice *device)
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139 {
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140 SDL_free(device->hidden);
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141 SDL_free(device);
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142 }
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143
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144 static SDL_AudioDevice *Audio_CreateDevice(int devindex)
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145 {
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146 SDL_AudioDevice *this;
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147
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diff changeset
148 /* Initialize all variables that we clean on shutdown */
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents: 1111
diff changeset
149 this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice));
644
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150 if ( this ) {
1336
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parents: 1111
diff changeset
151 SDL_memset(this, 0, (sizeof *this));
644
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diff changeset
152 this->hidden = (struct SDL_PrivateAudioData *)
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diff changeset
153 SDL_malloc((sizeof *this->hidden));
644
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154 }
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diff changeset
155 if ( (this == NULL) || (this->hidden == NULL) ) {
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diff changeset
156 SDL_OutOfMemory();
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diff changeset
157 if ( this ) {
1336
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parents: 1111
diff changeset
158 SDL_free(this);
644
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diff changeset
159 }
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diff changeset
160 return(0);
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diff changeset
161 }
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
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parents: 1111
diff changeset
162 SDL_memset(this->hidden, 0, (sizeof *this->hidden));
644
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163
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164 /* Set the function pointers */
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165 this->OpenAudio = Mint_OpenAudio;
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166 this->CloseAudio = Mint_CloseAudio;
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167 this->LockAudio = Mint_LockAudio;
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168 this->UnlockAudio = Mint_UnlockAudio;
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169 this->free = Audio_DeleteDevice;
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170
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171 return this;
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172 }
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173
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174 AudioBootStrap MINTAUDIO_MCSN_bootstrap = {
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175 MINT_AUDIO_DRIVER_NAME, "MiNT MCSN audio driver",
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176 Audio_Available, Audio_CreateDevice
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177 };
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178
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diff changeset
179 static void Mint_LockAudio(_THIS)
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180 {
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diff changeset
181 /* Stop replay */
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182 Buffoper(0);
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183 }
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diff changeset
184
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diff changeset
185 static void Mint_UnlockAudio(_THIS)
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186 {
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diff changeset
187 /* Restart replay */
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diff changeset
188 Buffoper(SB_PLA_ENA|SB_PLA_RPT);
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diff changeset
189 }
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190
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diff changeset
191 static void Mint_CloseAudio(_THIS)
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diff changeset
192 {
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193 /* Stop replay */
1111
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
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diff changeset
194 SDL_MintAudio_WaitThread();
644
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195 Buffoper(0);
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diff changeset
196
1111
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
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diff changeset
197 if (!SDL_MintAudio_mint_present) {
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
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diff changeset
198 /* Uninstall interrupt */
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
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diff changeset
199 Jdisint(MFP_DMASOUND);
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
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diff changeset
200 }
644
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diff changeset
201
594422ab8f9f Atari MiNT: added more audio drivers
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diff changeset
202 /* Wait if currently playing sound */
594422ab8f9f Atari MiNT: added more audio drivers
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diff changeset
203 while (SDL_MintAudio_mutex != 0) {
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diff changeset
204 }
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diff changeset
205
594422ab8f9f Atari MiNT: added more audio drivers
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diff changeset
206 /* Clear buffers */
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diff changeset
207 if (SDL_MintAudio_audiobuf[0]) {
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diff changeset
208 Mfree(SDL_MintAudio_audiobuf[0]);
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diff changeset
209 SDL_MintAudio_audiobuf[0] = SDL_MintAudio_audiobuf[1] = NULL;
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diff changeset
210 }
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diff changeset
211
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parents:
diff changeset
212 /* Unlock sound system */
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diff changeset
213 Unlocksnd();
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diff changeset
214 }
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diff changeset
215
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diff changeset
216 static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec)
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diff changeset
217 {
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diff changeset
218 int i;
594422ab8f9f Atari MiNT: added more audio drivers
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diff changeset
219 unsigned long masterclock, masterprediv;
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diff changeset
220
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diff changeset
221 DEBUG_PRINT((DEBUG_NAME "asked: %d bits, ",spec->format & 0x00ff));
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diff changeset
222 DEBUG_PRINT(("signed=%d, ", ((spec->format & 0x8000)!=0)));
704
c4803992e09c Small bugfixes
Patrice Mandin <patmandin@gmail.com>
parents: 644
diff changeset
223 DEBUG_PRINT(("big endian=%d, ", ((spec->format & 0x1000)!=0)));
644
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diff changeset
224 DEBUG_PRINT(("channels=%d, ", spec->channels));
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diff changeset
225 DEBUG_PRINT(("freq=%d\n", spec->freq));
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parents:
diff changeset
226
3851
405a192b68e7 Backport from 1.3: most of the audio drivers can now handle data
Ryan C. Gordon <icculus@icculus.org>
parents: 1412
diff changeset
227 if (spec->channels > 2) {
405a192b68e7 Backport from 1.3: most of the audio drivers can now handle data
Ryan C. Gordon <icculus@icculus.org>
parents: 1412
diff changeset
228 spec->channels = 2; /* no more than stereo! */
405a192b68e7 Backport from 1.3: most of the audio drivers can now handle data
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parents: 1412
diff changeset
229 }
405a192b68e7 Backport from 1.3: most of the audio drivers can now handle data
Ryan C. Gordon <icculus@icculus.org>
parents: 1412
diff changeset
230
644
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parents:
diff changeset
231 /* Check formats available */
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
232 MINTAUDIO_freqcount=0;
644
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parents:
diff changeset
233 switch(cookie_mcsn->play) {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
234 case MCSN_ST:
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parents:
diff changeset
235 spec->channels=1;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
236 spec->format=8; /* FIXME: is it signed or unsigned ? */
1107
856f76a099c7 Can use both clocks of FDI interface on Falcon, plus digital output
Patrice Mandin <patmandin@gmail.com>
parents: 1106
diff changeset
237 SDL_MintAudio_AddFrequency(this, 12500, 0, 0, -1);
644
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
238 break;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
239 case MCSN_TT: /* Also STE, Mega STE */
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parents:
diff changeset
240 spec->format=AUDIO_S8;
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parents:
diff changeset
241 masterclock=MASTERCLOCK_STE;
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parents:
diff changeset
242 masterprediv=MASTERPREDIV_STE;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
243 if ((cookie_mch>>16)==MCH_TT) {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
244 masterclock=MASTERCLOCK_TT;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
245 masterprediv=MASTERPREDIV_TT;
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parents:
diff changeset
246 }
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
247 for (i=0; i<4; i++) {
1107
856f76a099c7 Can use both clocks of FDI interface on Falcon, plus digital output
Patrice Mandin <patmandin@gmail.com>
parents: 1106
diff changeset
248 SDL_MintAudio_AddFrequency(this, masterclock/(masterprediv*(1<<i)),
856f76a099c7 Can use both clocks of FDI interface on Falcon, plus digital output
Patrice Mandin <patmandin@gmail.com>
parents: 1106
diff changeset
249 masterclock, 3-i, -1);
644
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
250 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
251 break;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
252 case MCSN_FALCON: /* Also Mac */
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
253 for (i=1; i<12; i++) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
254 /* Remove unusable Falcon codec predivisors */
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
255 if ((i==6) || (i==8) || (i==10)) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
256 continue;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
257 }
1107
856f76a099c7 Can use both clocks of FDI interface on Falcon, plus digital output
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parents: 1106
diff changeset
258 SDL_MintAudio_AddFrequency(this, MASTERCLOCK_FALCON1/(MASTERPREDIV_FALCON*(i+1)),
856f76a099c7 Can use both clocks of FDI interface on Falcon, plus digital output
Patrice Mandin <patmandin@gmail.com>
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diff changeset
259 CLK25M, i+1, -1);
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
260 }
644
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
261 if (cookie_mcsn->res1 != 0) {
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
262 for (i=1; i<4; i++) {
1107
856f76a099c7 Can use both clocks of FDI interface on Falcon, plus digital output
Patrice Mandin <patmandin@gmail.com>
parents: 1106
diff changeset
263 SDL_MintAudio_AddFrequency(this, (cookie_mcsn->res1)/(MASTERPREDIV_FALCON*(1<<i)),
856f76a099c7 Can use both clocks of FDI interface on Falcon, plus digital output
Patrice Mandin <patmandin@gmail.com>
parents: 1106
diff changeset
264 CLKEXT, (1<<i)-1, -1);
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
265 }
644
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
266 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
267 spec->format |= 0x8000; /* Audio is always signed */
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
268 if ((spec->format & 0x00ff)==16) {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
269 spec->format |= 0x1000; /* Audio is always big endian */
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parents:
diff changeset
270 spec->channels=2; /* 16 bits always stereo */
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
271 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
272 break;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
273 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
274
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
275 #if 1
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
276 for (i=0; i<MINTAUDIO_freqcount; i++) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
277 DEBUG_PRINT((DEBUG_NAME "freq %d: %lu Hz, clock %lu, prediv %d\n",
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
278 i, MINTAUDIO_frequencies[i].frequency, MINTAUDIO_frequencies[i].masterclock,
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
279 MINTAUDIO_frequencies[i].predivisor
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
280 ));
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
281 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
282 #endif
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
283
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
284 MINTAUDIO_numfreq=SDL_MintAudio_SearchFrequency(this, spec->freq);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
285 spec->freq=MINTAUDIO_frequencies[MINTAUDIO_numfreq].frequency;
644
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
286
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
287 DEBUG_PRINT((DEBUG_NAME "obtained: %d bits, ",spec->format & 0x00ff));
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
288 DEBUG_PRINT(("signed=%d, ", ((spec->format & 0x8000)!=0)));
704
c4803992e09c Small bugfixes
Patrice Mandin <patmandin@gmail.com>
parents: 644
diff changeset
289 DEBUG_PRINT(("big endian=%d, ", ((spec->format & 0x1000)!=0)));
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
290 DEBUG_PRINT(("channels=%d, ", spec->channels));
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diff changeset
291 DEBUG_PRINT(("freq=%d\n", spec->freq));
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diff changeset
292
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diff changeset
293 return 0;
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294 }
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295
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296 static void Mint_InitAudio(_THIS, SDL_AudioSpec *spec)
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297 {
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
298 int channels_mode, prediv, dmaclock;
644
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diff changeset
299 void *buffer;
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300
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301 /* Stop currently playing sound */
1111
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
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diff changeset
302 SDL_MintAudio_quit_thread = SDL_FALSE;
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
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diff changeset
303 SDL_MintAudio_thread_finished = SDL_TRUE;
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
Patrice Mandin <patmandin@gmail.com>
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diff changeset
304 SDL_MintAudio_WaitThread();
644
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305 Buffoper(0);
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306
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diff changeset
307 /* Set replay tracks */
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diff changeset
308 Settracks(0,0);
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309 Setmontracks(0);
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310
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diff changeset
311 /* Select replay format */
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diff changeset
312 channels_mode=STEREO16;
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diff changeset
313 switch (spec->format & 0xff) {
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diff changeset
314 case 8:
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315 if (spec->channels==2) {
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316 channels_mode=STEREO8;
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317 } else {
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diff changeset
318 channels_mode=MONO8;
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319 }
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diff changeset
320 break;
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321 }
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322 if (Setmode(channels_mode)<0) {
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diff changeset
323 DEBUG_PRINT((DEBUG_NAME "Setmode() failed\n"));
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324 }
594422ab8f9f Atari MiNT: added more audio drivers
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325
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
326 dmaclock = MINTAUDIO_frequencies[MINTAUDIO_numfreq].masterclock;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
327 prediv = MINTAUDIO_frequencies[MINTAUDIO_numfreq].predivisor;
644
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diff changeset
328 switch(cookie_mcsn->play) {
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diff changeset
329 case MCSN_TT:
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330 Devconnect(DMAPLAY, DAC, CLK25M, CLKOLD, 1);
961
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diff changeset
331 Soundcmd(SETPRESCALE, prediv);
644
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diff changeset
332 DEBUG_PRINT((DEBUG_NAME "STE/TT prescaler selected\n"));
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333 break;
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334 case MCSN_FALCON:
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diff changeset
335 Devconnect(DMAPLAY, DAC, dmaclock, prediv, 1);
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diff changeset
336 DEBUG_PRINT((DEBUG_NAME "Falcon prescaler selected\n"));
644
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337 break;
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338 }
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339
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340 /* Set buffer */
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341 buffer = SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf];
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342 if (Setbuffer(0, buffer, buffer + spec->size)<0) {
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343 DEBUG_PRINT((DEBUG_NAME "Setbuffer() failed\n"));
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344 }
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345
1111
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
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diff changeset
346 if (SDL_MintAudio_mint_present) {
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
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347 SDL_MintAudio_thread_pid = tfork(SDL_MintAudio_Thread, 0);
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348 } else {
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349 /* Install interrupt */
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350 Jdisint(MFP_DMASOUND);
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351 Xbtimer(XB_TIMERA, 8, 1, SDL_MintAudio_XbiosInterrupt);
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
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352 Jenabint(MFP_DMASOUND);
644
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diff changeset
353
1111
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diff changeset
354 if (Setinterrupt(SI_TIMERA, SI_PLAY)<0) {
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
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diff changeset
355 DEBUG_PRINT((DEBUG_NAME "Setinterrupt() failed\n"));
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
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diff changeset
356 }
644
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diff changeset
357 }
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diff changeset
358
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diff changeset
359 /* Go */
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360 Buffoper(SB_PLA_ENA|SB_PLA_RPT);
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diff changeset
361 DEBUG_PRINT((DEBUG_NAME "hardware initialized\n"));
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diff changeset
362 }
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diff changeset
363
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diff changeset
364 static int Mint_OpenAudio(_THIS, SDL_AudioSpec *spec)
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diff changeset
365 {
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diff changeset
366 /* Lock sound system */
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diff changeset
367 if (Locksnd()!=1) {
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diff changeset
368 SDL_SetError("Mint_OpenAudio: Audio system already in use");
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diff changeset
369 return(-1);
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diff changeset
370 }
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diff changeset
371
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diff changeset
372 SDL_MintAudio_device = this;
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diff changeset
373
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parents:
diff changeset
374 /* Check audio capabilities */
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diff changeset
375 if (Mint_CheckAudio(this, spec)==-1) {
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diff changeset
376 return -1;
594422ab8f9f Atari MiNT: added more audio drivers
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diff changeset
377 }
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diff changeset
378
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diff changeset
379 SDL_CalculateAudioSpec(spec);
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parents:
diff changeset
380
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parents:
diff changeset
381 /* Allocate memory for audio buffers in DMA-able RAM */
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parents:
diff changeset
382 DEBUG_PRINT((DEBUG_NAME "buffer size=%d\n", spec->size));
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parents:
diff changeset
383
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
384 SDL_MintAudio_audiobuf[0] = Atari_SysMalloc(spec->size *2, MX_STRAM);
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
385 if (SDL_MintAudio_audiobuf[0]==NULL) {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
386 SDL_SetError("MINT_OpenAudio: Not enough memory for audio buffer");
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
387 return (-1);
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
388 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
389 SDL_MintAudio_audiobuf[1] = SDL_MintAudio_audiobuf[0] + spec->size ;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
390 SDL_MintAudio_numbuf=0;
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents: 1111
diff changeset
391 SDL_memset(SDL_MintAudio_audiobuf[0], spec->silence, spec->size *2);
644
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
392 SDL_MintAudio_audiosize = spec->size;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
393 SDL_MintAudio_mutex = 0;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
394
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
395 DEBUG_PRINT((DEBUG_NAME "buffer 0 at 0x%08x\n", SDL_MintAudio_audiobuf[0]));
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
396 DEBUG_PRINT((DEBUG_NAME "buffer 1 at 0x%08x\n", SDL_MintAudio_audiobuf[1]));
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
397
3865
e958a003b69b Add function to check FPU presence
Patrice Mandin <patmandin@gmail.com>
parents: 3851
diff changeset
398 SDL_MintAudio_CheckFpu();
e958a003b69b Add function to check FPU presence
Patrice Mandin <patmandin@gmail.com>
parents: 3851
diff changeset
399
644
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
400 /* Setup audio hardware */
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
401 Mint_InitAudio(this, spec);
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parents:
diff changeset
402
1111
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
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diff changeset
403 return(1); /* We don't use SDL threaded audio */
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
404 }