Mercurial > sdl-ios-xcode

annotate src/audio/mint/SDL_mintaudio_mcsn.c @ 4328:4abf24b03b1d SDL-1.2

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Only show the dynamic audio libraries if we'll be dynamically loading them
author Sam Lantinga <slouken@libsdl.org>
date Tue, 13 Oct 2009 06:45:02 +0000
parents 04a75cf3ff1c
children
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 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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148 /* Initialize all variables that we clean on shutdown */
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Sam Lantinga <slouken@libsdl.org>
parents: 1111
diff changeset
149 this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice));
644
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diff changeset
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 *)
1336
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parents: 1111
diff changeset
153 SDL_malloc((sizeof *this->hidden));
644
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diff changeset
154 }
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parents:
diff changeset
155 if ( (this == NULL) || (this->hidden == NULL) ) {
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parents:
diff changeset
156 SDL_OutOfMemory();
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diff changeset
157 if ( this ) {
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
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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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diff changeset
164 /* Set the function pointers */
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diff changeset
165 this->OpenAudio = Mint_OpenAudio;
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diff changeset
166 this->CloseAudio = Mint_CloseAudio;
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diff changeset
167 this->LockAudio = Mint_LockAudio;
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diff changeset
168 this->UnlockAudio = Mint_UnlockAudio;
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diff changeset
169 this->free = Audio_DeleteDevice;
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diff changeset
170
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diff changeset
171 return this;
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diff changeset
172 }
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diff changeset
173
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diff changeset
174 AudioBootStrap MINTAUDIO_MCSN_bootstrap = {
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diff changeset
175 MINT_AUDIO_DRIVER_NAME, "MiNT MCSN audio driver",
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176 Audio_Available, Audio_CreateDevice
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diff changeset
177 };
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178
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diff changeset
179 static void Mint_LockAudio(_THIS)
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diff changeset
180 {
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diff changeset
181 /* Stop replay */
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diff changeset
182 Buffoper(0);
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diff changeset
183 }
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diff changeset
184
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diff changeset
185 static void Mint_UnlockAudio(_THIS)
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parents:
diff changeset
186 {
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parents:
diff changeset
187 /* Restart replay */
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parents:
diff changeset
188 Buffoper(SB_PLA_ENA|SB_PLA_RPT);
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parents:
diff changeset
189 }
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diff changeset
190
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diff changeset
191 static void Mint_CloseAudio(_THIS)
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diff changeset
192 {
594422ab8f9f Atari MiNT: added more audio drivers
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diff changeset
193 /* Stop replay */
1111
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
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parents: 1107
diff changeset
194 SDL_MintAudio_WaitThread();
644
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diff changeset
195 Buffoper(0);
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diff changeset
196
1111
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
Patrice Mandin <patmandin@gmail.com>
parents: 1107
diff changeset
197 if (!SDL_MintAudio_mint_present) {
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
Patrice Mandin <patmandin@gmail.com>
parents: 1107
diff changeset
198 /* Uninstall interrupt */
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
Patrice Mandin <patmandin@gmail.com>
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diff changeset
199 Jdisint(MFP_DMASOUND);
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
Patrice Mandin <patmandin@gmail.com>
parents: 1107
diff changeset
200 }
644
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
201
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
202 /* Wait if currently playing sound */
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
203 while (SDL_MintAudio_mutex != 0) {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
204 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
205
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
206 /* Clear buffers */
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
207 if (SDL_MintAudio_audiobuf[0]) {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
208 Mfree(SDL_MintAudio_audiobuf[0]);
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parents:
diff changeset
209 SDL_MintAudio_audiobuf[0] = SDL_MintAudio_audiobuf[1] = NULL;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
210 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
211
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
212 /* Unlock sound system */
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
213 Unlocksnd();
594422ab8f9f Atari MiNT: added more audio drivers
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diff changeset
214 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
215
594422ab8f9f Atari MiNT: added more audio drivers
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diff changeset
216 static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec)
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parents:
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));
594422ab8f9f Atari MiNT: added more audio drivers
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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
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
224 DEBUG_PRINT(("channels=%d, ", spec->channels));
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
225 DEBUG_PRINT(("freq=%d\n", spec->freq));
594422ab8f9f Atari MiNT: added more audio drivers
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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
Ryan C. Gordon <icculus@icculus.org>
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
594422ab8f9f Atari MiNT: added more audio drivers
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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
594422ab8f9f Atari MiNT: added more audio drivers
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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 */
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
240 spec->format=AUDIO_S8;
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parents:
diff changeset
241 masterclock=MASTERCLOCK_STE;
594422ab8f9f Atari MiNT: added more audio drivers
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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
Patrice Mandin <patmandin@gmail.com>
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
Patrice Mandin <patmandin@gmail.com>
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>
parents: 1106
diff changeset
259 CLK25M, i+1, -1);
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
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
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
269 spec->format |= 0x1000; /* Audio is always big endian */
594422ab8f9f Atari MiNT: added more audio drivers
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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
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
273 }
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
274
4177
04a75cf3ff1c Disable debug code
Patrice Mandin <patmandin@gmail.com>
parents: 4159
diff changeset
275 #if 0
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
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
Patrice Mandin <patmandin@gmail.com>
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
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
286
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
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));
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
291 DEBUG_PRINT(("freq=%d\n", spec->freq));
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292
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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 {
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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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299 void *buffer;
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300
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301 /* Stop currently playing sound */
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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;
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303 SDL_MintAudio_thread_finished = SDL_TRUE;
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304 SDL_MintAudio_WaitThread();
644
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305 Buffoper(0);
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306
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307 /* Set replay tracks */
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308 Settracks(0,0);
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309 Setmontracks(0);
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310
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311 /* Select replay format */
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312 channels_mode=STEREO16;
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313 switch (spec->format & 0xff) {
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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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318 channels_mode=MONO8;
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319 }
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320 break;
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321 }
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322 if (Setmode(channels_mode)<0) {
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323 DEBUG_PRINT((DEBUG_NAME "Setmode() failed\n"));
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324 }
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325
961
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diff changeset
326 dmaclock = MINTAUDIO_frequencies[MINTAUDIO_numfreq].masterclock;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
327 prediv = MINTAUDIO_frequencies[MINTAUDIO_numfreq].predivisor;
644
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328 switch(cookie_mcsn->play) {
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329 case MCSN_TT:
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330 Devconnect(DMAPLAY, DAC, CLK25M, CLKOLD, 1);
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331 Soundcmd(SETPRESCALE, prediv);
644
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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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335 Devconnect(DMAPLAY, DAC, dmaclock, prediv, 1);
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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
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346 if (SDL_MintAudio_mint_present) {
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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);
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352 Jenabint(MFP_DMASOUND);
644
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353
1111
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diff changeset
354 if (Setinterrupt(SI_TIMERA, SI_PLAY)<0) {
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355 DEBUG_PRINT((DEBUG_NAME "Setinterrupt() failed\n"));
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356 }
644
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357 }
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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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361 DEBUG_PRINT((DEBUG_NAME "hardware initialized\n"));
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362 }
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363
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diff changeset
364 static int Mint_OpenAudio(_THIS, SDL_AudioSpec *spec)
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365 {
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366 /* Lock sound system */
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diff changeset
367 if (Locksnd()!=1) {
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368 SDL_SetError("Mint_OpenAudio: Audio system already in use");
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369 return(-1);
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370 }
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diff changeset
371
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372 SDL_MintAudio_device = this;
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373
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diff changeset
374 /* Check audio capabilities */
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375 if (Mint_CheckAudio(this, spec)==-1) {
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376 return -1;
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377 }
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diff changeset
378
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diff changeset
379 SDL_CalculateAudioSpec(spec);
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diff changeset
380
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diff changeset
381 /* Allocate memory for audio buffers in DMA-able RAM */
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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);
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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");
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diff changeset
387 return (-1);
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diff changeset
388 }
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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
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diff changeset
392 SDL_MintAudio_audiosize = spec->size;
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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
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parents:
diff changeset
395 DEBUG_PRINT((DEBUG_NAME "buffer 0 at 0x%08x\n", SDL_MintAudio_audiobuf[0]));
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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
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parents: 3851
diff changeset
398 SDL_MintAudio_CheckFpu();
e958a003b69b Add function to check FPU presence
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parents: 3851
diff changeset
399
644
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
400 /* Setup audio hardware */
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parents:
diff changeset
401 Mint_InitAudio(this, spec);
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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
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diff changeset
404 }