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annotate src/audio/mint/SDL_mintaudio_gsxb.c @ 1361:19418e4422cb

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New configure-based build system. Still work in progress, but much improved
author Sam Lantinga <slouken@libsdl.org>
date Thu, 16 Feb 2006 10:11:48 +0000
parents c71e05b4dc2e
children d910939febfa
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
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23 /*
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24 MiNT audio driver
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25 using XBIOS functions (GSXB compatible driver)
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26
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27 Patrice Mandin
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28 */
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29
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30 /* Mint includes */
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31 #include <mint/osbind.h>
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32 #include <mint/falcon.h>
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33 #include <mint/cookie.h>
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34
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35 #include "SDL_audio.h"
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36 #include "../SDL_audio_c.h"
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37 #include "../SDL_sysaudio.h"
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38
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39 #include "SDL_atarimxalloc_c.h"
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40
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41 #include "SDL_mintaudio.h"
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42 #include "SDL_mintaudio_gsxb.h"
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43
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44 /*--- Defines ---*/
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45
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46 #define MINT_AUDIO_DRIVER_NAME "mint_gsxb"
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47
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48 /* Debug print info */
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49 #define DEBUG_NAME "audio:gsxb: "
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50 #if 0
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51 #define DEBUG_PRINT(what) \
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52 { \
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53 printf what; \
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54 }
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55 #else
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56 #define DEBUG_PRINT(what)
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57 #endif
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58
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59 /*--- Static variables ---*/
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60
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61 static unsigned long cookie_snd, cookie_gsxb;
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62
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63 /*--- Audio driver functions ---*/
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64
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65 static void Mint_CloseAudio(_THIS);
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66 static int Mint_OpenAudio(_THIS, SDL_AudioSpec *spec);
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67 static void Mint_LockAudio(_THIS);
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68 static void Mint_UnlockAudio(_THIS);
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69
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70 /* To check/init hardware audio */
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71 static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec);
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72 static void Mint_InitAudio(_THIS, SDL_AudioSpec *spec);
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73
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74 /* GSXB callbacks */
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75 static void Mint_GsxbInterrupt(void);
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76 static void Mint_GsxbNullInterrupt(void);
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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 const char *envr = SDL_getenv("SDL_AUDIODRIVER");
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83
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84 /* Check if user asked a different audio driver */
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85 if ((envr) && (SDL_strcmp(envr, MINT_AUDIO_DRIVER_NAME)!=0)) {
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86 DEBUG_PRINT((DEBUG_NAME "user asked a different audio driver\n"));
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87 return(0);
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88 }
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89
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90 /* Cookie _SND present ? if not, assume ST machine */
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91 if (Getcookie(C__SND, &cookie_snd) == C_NOTFOUND) {
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92 cookie_snd = SND_PSG;
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93 }
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94
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95 /* Check if we have 16 bits audio */
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96 if ((cookie_snd & SND_16BIT)==0) {
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97 DEBUG_PRINT((DEBUG_NAME "no 16 bits sound\n"));
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98 return(0);
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99 }
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100
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101 /* Cookie GSXB present ? */
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102 cookie_gsxb = (Getcookie(C_GSXB, &cookie_gsxb) == C_FOUND);
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103
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104 /* Is it GSXB ? */
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105 if (((cookie_snd & SND_GSXB)==0) || (cookie_gsxb==0)) {
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106 DEBUG_PRINT((DEBUG_NAME "no GSXB audio\n"));
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107 return(0);
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108 }
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109
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110 /* Check if audio is lockable */
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111 if (Locksnd()!=1) {
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112 DEBUG_PRINT((DEBUG_NAME "audio locked by other application\n"));
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113 return(0);
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114 }
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115
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116 Unlocksnd();
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117
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118 DEBUG_PRINT((DEBUG_NAME "GSXB audio available!\n"));
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119 return(1);
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120 }
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121
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122 static void Audio_DeleteDevice(SDL_AudioDevice *device)
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123 {
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124 SDL_free(device->hidden);
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125 SDL_free(device);
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126 }
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127
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128 static SDL_AudioDevice *Audio_CreateDevice(int devindex)
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129 {
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130 SDL_AudioDevice *this;
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131
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132 /* Initialize all variables that we clean on shutdown */
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133 this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice));
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134 if ( this ) {
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135 SDL_memset(this, 0, (sizeof *this));
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136 this->hidden = (struct SDL_PrivateAudioData *)
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137 SDL_malloc((sizeof *this->hidden));
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138 }
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139 if ( (this == NULL) || (this->hidden == NULL) ) {
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140 SDL_OutOfMemory();
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141 if ( this ) {
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142 SDL_free(this);
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143 }
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144 return(0);
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145 }
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146 SDL_memset(this->hidden, 0, (sizeof *this->hidden));
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147
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148 /* Set the function pointers */
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149 this->OpenAudio = Mint_OpenAudio;
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parents:
diff changeset
150 this->CloseAudio = Mint_CloseAudio;
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parents:
diff changeset
151 this->LockAudio = Mint_LockAudio;
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parents:
diff changeset
152 this->UnlockAudio = Mint_UnlockAudio;
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parents:
diff changeset
153 this->free = Audio_DeleteDevice;
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parents:
diff changeset
154
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parents:
diff changeset
155 return this;
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parents:
diff changeset
156 }
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parents:
diff changeset
157
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parents:
diff changeset
158 AudioBootStrap MINTAUDIO_GSXB_bootstrap = {
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parents:
diff changeset
159 MINT_AUDIO_DRIVER_NAME, "MiNT GSXB audio driver",
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parents:
diff changeset
160 Audio_Available, Audio_CreateDevice
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parents:
diff changeset
161 };
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parents:
diff changeset
162
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parents:
diff changeset
163 static void Mint_LockAudio(_THIS)
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parents:
diff changeset
164 {
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parents:
diff changeset
165 /* Stop replay */
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parents:
diff changeset
166 Buffoper(0);
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Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
167 }
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parents:
diff changeset
168
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parents:
diff changeset
169 static void Mint_UnlockAudio(_THIS)
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parents:
diff changeset
170 {
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parents:
diff changeset
171 /* Restart replay */
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Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
172 Buffoper(SB_PLA_ENA|SB_PLA_RPT);
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Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
173 }
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parents:
diff changeset
174
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parents:
diff changeset
175 static void Mint_CloseAudio(_THIS)
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Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
176 {
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parents:
diff changeset
177 /* Stop replay */
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parents:
diff changeset
178 Buffoper(0);
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parents:
diff changeset
179
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parents:
diff changeset
180 /* Uninstall interrupt */
1097
c83fa1c650dd Move GSXB callback to C source
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parents: 962
diff changeset
181 if (NSetinterrupt(2, SI_NONE, Mint_GsxbNullInterrupt)<0) {
644
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parents:
diff changeset
182 DEBUG_PRINT((DEBUG_NAME "NSetinterrupt() failed in close\n"));
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parents:
diff changeset
183 }
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parents:
diff changeset
184
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parents:
diff changeset
185 /* Wait if currently playing sound */
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Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
186 while (SDL_MintAudio_mutex != 0) {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
187 }
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parents:
diff changeset
188
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parents:
diff changeset
189 /* Clear buffers */
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parents:
diff changeset
190 if (SDL_MintAudio_audiobuf[0]) {
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Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
191 Mfree(SDL_MintAudio_audiobuf[0]);
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parents:
diff changeset
192 SDL_MintAudio_audiobuf[0] = SDL_MintAudio_audiobuf[1] = NULL;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
193 }
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parents:
diff changeset
194
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
195 /* Unlock sound system */
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parents:
diff changeset
196 Unlocksnd();
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parents:
diff changeset
197 }
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parents:
diff changeset
198
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parents:
diff changeset
199 static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec)
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parents:
diff changeset
200 {
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parents:
diff changeset
201 long snd_format;
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parents:
diff changeset
202 int i, resolution, format_signed, format_bigendian;
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parents:
diff changeset
203
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diff changeset
204 resolution = spec->format & 0x00ff;
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parents:
diff changeset
205 format_signed = ((spec->format & 0x8000)!=0);
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
206 format_bigendian = ((spec->format & 0x1000)!=0);
704
c4803992e09c Small bugfixes
Patrice Mandin <patmandin@gmail.com>
parents: 644
diff changeset
207
c4803992e09c Small bugfixes
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parents: 644
diff changeset
208 DEBUG_PRINT((DEBUG_NAME "asked: %d bits, ",spec->format & 0x00ff));
c4803992e09c Small bugfixes
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diff changeset
209 DEBUG_PRINT(("signed=%d, ", ((spec->format & 0x8000)!=0)));
c4803992e09c Small bugfixes
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diff changeset
210 DEBUG_PRINT(("big endian=%d, ", ((spec->format & 0x1000)!=0)));
644
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
211 DEBUG_PRINT(("channels=%d, ", spec->channels));
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parents:
diff changeset
212 DEBUG_PRINT(("freq=%d\n", spec->freq));
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parents:
diff changeset
213
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parents:
diff changeset
214 /* Check formats available */
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parents:
diff changeset
215 snd_format = Sndstatus(SND_QUERYFORMATS);
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parents:
diff changeset
216 switch (resolution) {
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parents:
diff changeset
217 case 8:
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diff changeset
218 if ((snd_format & SND_FORMAT8)==0) {
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parents:
diff changeset
219 SDL_SetError("Mint_CheckAudio: 8 bits samples not supported");
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diff changeset
220 return -1;
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parents:
diff changeset
221 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
222 snd_format = Sndstatus(SND_QUERY8BIT);
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parents:
diff changeset
223 break;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
224 case 16:
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
225 if ((snd_format & SND_FORMAT16)==0) {
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parents:
diff changeset
226 SDL_SetError("Mint_CheckAudio: 16 bits samples not supported");
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diff changeset
227 return -1;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
228 }
594422ab8f9f Atari MiNT: added more audio drivers
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diff changeset
229 snd_format = Sndstatus(SND_QUERY16BIT);
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parents:
diff changeset
230 break;
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parents:
diff changeset
231 default:
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
232 SDL_SetError("Mint_CheckAudio: Unsupported sample resolution");
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parents:
diff changeset
233 return -1;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
234 break;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
235 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
236
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
237 /* Check signed/unsigned format */
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
238 if (format_signed) {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
239 if (snd_format & SND_FORMATSIGNED) {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
240 /* Ok */
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
241 } else if (snd_format & SND_FORMATUNSIGNED) {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
242 /* Give unsigned format */
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
243 spec->format = spec->format & (~0x8000);
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
244 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
245 } else {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
246 if (snd_format & SND_FORMATUNSIGNED) {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
247 /* Ok */
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
248 } else if (snd_format & SND_FORMATSIGNED) {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
249 /* Give signed format */
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parents:
diff changeset
250 spec->format |= 0x8000;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
251 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
252 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
253
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
254 if (format_bigendian) {
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parents:
diff changeset
255 if (snd_format & SND_FORMATBIGENDIAN) {
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
256 /* Ok */
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
257 } else if (snd_format & SND_FORMATLITTLEENDIAN) {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
258 /* Give little endian format */
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
259 spec->format = spec->format & (~0x1000);
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parents:
diff changeset
260 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
261 } else {
704
c4803992e09c Small bugfixes
Patrice Mandin <patmandin@gmail.com>
parents: 644
diff changeset
262 if (snd_format & SND_FORMATLITTLEENDIAN) {
644
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
263 /* Ok */
704
c4803992e09c Small bugfixes
Patrice Mandin <patmandin@gmail.com>
parents: 644
diff changeset
264 } else if (snd_format & SND_FORMATBIGENDIAN) {
644
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
265 /* Give big endian format */
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
266 spec->format |= 0x1000;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
267 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
268 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
269
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
270 /* Calculate and select the closest frequency */
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
271 MINTAUDIO_freqcount=0;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
272 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: 1097
diff changeset
273 SDL_MintAudio_AddFrequency(this,
856f76a099c7 Can use both clocks of FDI interface on Falcon, plus digital output
Patrice Mandin <patmandin@gmail.com>
parents: 1097
diff changeset
274 MASTERCLOCK_44K/(MASTERPREDIV_MILAN*(1<<i)), MASTERCLOCK_44K,
856f76a099c7 Can use both clocks of FDI interface on Falcon, plus digital output
Patrice Mandin <patmandin@gmail.com>
parents: 1097
diff changeset
275 (1<<i)-1, -1);
644
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
276 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
277
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
278 #if 1
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
279 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
280 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
281 i, MINTAUDIO_frequencies[i].frequency, MINTAUDIO_frequencies[i].masterclock,
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
282 MINTAUDIO_frequencies[i].predivisor
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 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
285 #endif
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
286
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
287 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
288 spec->freq=MINTAUDIO_frequencies[MINTAUDIO_numfreq].frequency;
644
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parents:
diff changeset
289
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
290 DEBUG_PRINT((DEBUG_NAME "obtained: %d bits, ",spec->format & 0x00ff));
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
291 DEBUG_PRINT(("signed=%d, ", ((spec->format & 0x8000)!=0)));
704
c4803992e09c Small bugfixes
Patrice Mandin <patmandin@gmail.com>
parents: 644
diff changeset
292 DEBUG_PRINT(("big endian=%d, ", ((spec->format & 0x1000)!=0)));
644
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
293 DEBUG_PRINT(("channels=%d, ", spec->channels));
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
294 DEBUG_PRINT(("freq=%d\n", spec->freq));
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
295
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
296 return 0;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
297 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
298
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299 static void Mint_InitAudio(_THIS, SDL_AudioSpec *spec)
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300 {
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
301 int channels_mode, prediv;
644
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302 void *buffer;
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303
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304 /* Stop currently playing sound */
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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 switch (spec->format & 0xff) {
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313 case 8:
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314 if (spec->channels==2) {
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315 channels_mode=STEREO8;
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316 } else {
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317 channels_mode=MONO8;
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318 }
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319 break;
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320 case 16:
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321 if (spec->channels==2) {
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322 channels_mode=STEREO16;
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323 } else {
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324 channels_mode=MONO16;
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325 }
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326 break;
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327 default:
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328 channels_mode=STEREO16;
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329 break;
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330 }
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331 if (Setmode(channels_mode)<0) {
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332 DEBUG_PRINT((DEBUG_NAME "Setmode() failed\n"));
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333 }
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334
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parents: 769
diff changeset
335 prediv = MINTAUDIO_frequencies[MINTAUDIO_numfreq].predivisor;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
336 Devconnect(DMAPLAY, DAC, CLKEXT, prediv, 1);
644
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337
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338 /* Set buffer */
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339 buffer = SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf];
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340 if (Setbuffer(0, buffer, buffer + spec->size)<0) {
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341 DEBUG_PRINT((DEBUG_NAME "Setbuffer() failed\n"));
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342 }
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343
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344 /* Install interrupt */
1097
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diff changeset
345 if (NSetinterrupt(2, SI_PLAY, Mint_GsxbInterrupt)<0) {
644
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346 DEBUG_PRINT((DEBUG_NAME "NSetinterrupt() failed\n"));
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347 }
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348
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349 /* Go */
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350 Buffoper(SB_PLA_ENA|SB_PLA_RPT);
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351 DEBUG_PRINT((DEBUG_NAME "hardware initialized\n"));
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352 }
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353
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354 static int Mint_OpenAudio(_THIS, SDL_AudioSpec *spec)
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355 {
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356 /* Lock sound system */
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357 if (Locksnd()!=1) {
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358 SDL_SetError("Mint_OpenAudio: Audio system already in use");
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359 return(-1);
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360 }
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361
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362 SDL_MintAudio_device = this;
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363
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diff changeset
364 /* Check audio capabilities */
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365 if (Mint_CheckAudio(this, spec)==-1) {
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366 return -1;
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367 }
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diff changeset
368
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369 SDL_CalculateAudioSpec(spec);
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diff changeset
370
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diff changeset
371 /* Allocate memory for audio buffers in DMA-able RAM */
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diff changeset
372 DEBUG_PRINT((DEBUG_NAME "buffer size=%d\n", spec->size));
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diff changeset
373
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diff changeset
374 SDL_MintAudio_audiobuf[0] = Atari_SysMalloc(spec->size *2, MX_STRAM);
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diff changeset
375 if (SDL_MintAudio_audiobuf[0]==NULL) {
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376 SDL_SetError("MINT_OpenAudio: Not enough memory for audio buffer");
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377 return (-1);
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378 }
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diff changeset
379 SDL_MintAudio_audiobuf[1] = SDL_MintAudio_audiobuf[0] + spec->size ;
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380 SDL_MintAudio_numbuf=0;
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents: 1107
diff changeset
381 SDL_memset(SDL_MintAudio_audiobuf[0], spec->silence, spec->size *2);
644
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diff changeset
382 SDL_MintAudio_audiosize = spec->size;
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parents:
diff changeset
383 SDL_MintAudio_mutex = 0;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
384
594422ab8f9f Atari MiNT: added more audio drivers
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diff changeset
385 DEBUG_PRINT((DEBUG_NAME "buffer 0 at 0x%08x\n", SDL_MintAudio_audiobuf[0]));
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parents:
diff changeset
386 DEBUG_PRINT((DEBUG_NAME "buffer 1 at 0x%08x\n", SDL_MintAudio_audiobuf[1]));
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parents:
diff changeset
387
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
388 /* Setup audio hardware */
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diff changeset
389 Mint_InitAudio(this, spec);
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parents:
diff changeset
390
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diff changeset
391 return(1); /* We don't use threaded audio */
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392 }
1097
c83fa1c650dd Move GSXB callback to C source
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parents: 962
diff changeset
393
c83fa1c650dd Move GSXB callback to C source
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parents: 962
diff changeset
394 static void Mint_GsxbInterrupt(void)
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parents: 962
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395 {
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parents: 962
diff changeset
396 Uint8 *newbuf;
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parents: 962
diff changeset
397
c83fa1c650dd Move GSXB callback to C source
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parents: 962
diff changeset
398 if (SDL_MintAudio_mutex)
c83fa1c650dd Move GSXB callback to C source
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parents: 962
diff changeset
399 return;
c83fa1c650dd Move GSXB callback to C source
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parents: 962
diff changeset
400
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
401 SDL_MintAudio_mutex=1;
c83fa1c650dd Move GSXB callback to C source
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parents: 962
diff changeset
402
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
403 SDL_MintAudio_numbuf ^= 1;
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
404 SDL_MintAudio_Callback();
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
405 newbuf = SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf];
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
406 Setbuffer(0, newbuf, newbuf + SDL_MintAudio_audiosize);
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
407
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
408 SDL_MintAudio_mutex=0;
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
409 }
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
410
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
411 static void Mint_GsxbNullInterrupt(void)
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
412 {
c83fa1c650dd Move GSXB callback to C source
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parents: 962
diff changeset
413 }