Mercurial > sdl-ios-xcode

annotate src/audio/mint/SDL_mintaudio_xbios.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 (Falcon)
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26
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27 Patrice Mandin, Didier Méquignon
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28 */
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29
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30 #include <unistd.h>
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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 "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_dma8.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_xbios"
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50
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51 /* Debug print info */
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52 #define DEBUG_NAME "audio:xbios: "
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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;
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65
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66 /*--- Audio driver functions ---*/
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67
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68 static void Mint_CloseAudio(_THIS);
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69 static int Mint_OpenAudio(_THIS, SDL_AudioSpec *spec);
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70 static void Mint_LockAudio(_THIS);
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71 static void Mint_UnlockAudio(_THIS);
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72
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73 /* To check/init hardware audio */
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74 static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec);
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75 static void Mint_InitAudio(_THIS, SDL_AudioSpec *spec);
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76
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77 /*--- Audio driver bootstrap functions ---*/
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78
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79 static int Audio_Available(void)
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80 {
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81 unsigned long dummy;
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82 const char *envr = SDL_getenv("SDL_AUDIODRIVER");
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83
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84 SDL_MintAudio_mint_present = (Getcookie(C_MiNT, &dummy) == C_FOUND);
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85
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86 /* We can't use XBIOS in interrupt with Magic, don't know about thread */
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87 if (Getcookie(C_MagX, &dummy) == C_FOUND) {
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88 return(0);
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89 }
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90
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91 /* Check if user asked a different audio driver */
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92 if ((envr) && (SDL_strcmp(envr, MINT_AUDIO_DRIVER_NAME)!=0)) {
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93 DEBUG_PRINT((DEBUG_NAME "user asked a different audio driver\n"));
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94 return(0);
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95 }
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96
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97 /* Cookie _SND present ? if not, assume ST machine */
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98 if (Getcookie(C__SND, &cookie_snd) == C_NOTFOUND) {
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99 cookie_snd = SND_PSG;
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100 }
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101
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102 /* Check if we have 16 bits audio */
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103 if ((cookie_snd & SND_16BIT)==0) {
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104 DEBUG_PRINT((DEBUG_NAME "no 16 bits sound\n"));
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105 return(0);
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106 }
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107
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108 /* Check if audio is lockable */
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109 if (Locksnd()!=1) {
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110 DEBUG_PRINT((DEBUG_NAME "audio locked by other application\n"));
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111 return(0);
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112 }
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113
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114 Unlocksnd();
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115
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116 DEBUG_PRINT((DEBUG_NAME "XBIOS audio available!\n"));
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117 return(1);
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118 }
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119
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120 static void Audio_DeleteDevice(SDL_AudioDevice *device)
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121 {
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122 SDL_free(device->hidden);
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123 SDL_free(device);
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124 }
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125
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126 static SDL_AudioDevice *Audio_CreateDevice(int devindex)
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127 {
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128 SDL_AudioDevice *this;
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129
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130 /* Initialize all variables that we clean on shutdown */
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131 this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice));
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132 if ( this ) {
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133 SDL_memset(this, 0, (sizeof *this));
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134 this->hidden = (struct SDL_PrivateAudioData *)
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135 SDL_malloc((sizeof *this->hidden));
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136 }
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137 if ( (this == NULL) || (this->hidden == NULL) ) {
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138 SDL_OutOfMemory();
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139 if ( this ) {
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140 SDL_free(this);
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141 }
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142 return(0);
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143 }
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144 SDL_memset(this->hidden, 0, (sizeof *this->hidden));
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145
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146 /* Set the function pointers */
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147 this->OpenAudio = Mint_OpenAudio;
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parents:
diff changeset
148 this->CloseAudio = Mint_CloseAudio;
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parents:
diff changeset
149 this->LockAudio = Mint_LockAudio;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
150 this->UnlockAudio = Mint_UnlockAudio;
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parents:
diff changeset
151 this->free = Audio_DeleteDevice;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
152
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
153 return this;
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
154 }
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
155
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
156 AudioBootStrap MINTAUDIO_XBIOS_bootstrap = {
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
157 MINT_AUDIO_DRIVER_NAME, "MiNT XBIOS audio driver",
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
158 Audio_Available, Audio_CreateDevice
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
159 };
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
160
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
161 static void Mint_LockAudio(_THIS)
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
162 {
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
163 /* Stop replay */
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
164 Buffoper(0);
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
165 }
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
166
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
167 static void Mint_UnlockAudio(_THIS)
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
168 {
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
169 /* Restart replay */
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
170 Buffoper(SB_PLA_ENA|SB_PLA_RPT);
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
171 }
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
172
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
173 static void Mint_CloseAudio(_THIS)
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
174 {
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
175 /* Stop replay */
1111
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
Patrice Mandin <patmandin@gmail.com>
parents: 1107
diff changeset
176 SDL_MintAudio_WaitThread();
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
177 Buffoper(0);
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
178
1111
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
Patrice Mandin <patmandin@gmail.com>
parents: 1107
diff changeset
179 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
180 /* Uninstall interrupt */
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
Patrice Mandin <patmandin@gmail.com>
parents: 1107
diff changeset
181 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
182 }
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
183
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
184 /* Wait if currently playing sound */
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
185 while (SDL_MintAudio_mutex != 0) {
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
186 }
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
187
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
188 /* Clear buffers */
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
189 if (SDL_MintAudio_audiobuf[0]) {
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
190 Mfree(SDL_MintAudio_audiobuf[0]);
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
191 SDL_MintAudio_audiobuf[0] = SDL_MintAudio_audiobuf[1] = NULL;
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
192 }
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
193
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
194 /* Unlock sound system */
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
195 Unlocksnd();
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
196 }
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
197
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
198 /* Falcon XBIOS implementation of Devconnect() is buggy with external clock */
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
199 static void Devconnect2(int src, int dst, int sclk, int pre)
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
200 {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
201 static const unsigned short MASK1[3] = { 0, 0x6000, 0 };
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
202 static const unsigned short MASK2[4] = { 0xFFF0, 0xFF8F, 0xF0FF, 0x0FFF };
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
203 static const unsigned short INDEX1[4] = { 1, 3, 5, 7 };
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
204 static const unsigned short INDEX2[4] = { 0, 2, 4, 6 };
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
205 unsigned short sync_div,dev_ctrl,dest_ctrl;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
206 void *oldstack;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
207
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
208 if (dst==0) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
209 return;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
210 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
211
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
212 oldstack=(void *)Super(0);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
213
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
214 dev_ctrl = DMAAUDIO_IO.dev_ctrl;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
215 dest_ctrl = DMAAUDIO_IO.dest_ctrl;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
216 dev_ctrl &= MASK2[src];
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
217
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
218 if (src==ADC) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
219 dev_ctrl |= MASK1[sclk];
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
220 } else {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
221 dev_ctrl |= (INDEX1[sclk] << (src<<4));
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
222 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
223
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
224 if (dst & DMAREC) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
225 dest_ctrl &= 0xFFF0;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
226 dest_ctrl |= INDEX1[src];
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
227 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
228
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
229 if (dst & DSPRECV) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
230 dest_ctrl &= 0xFF8F;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
231 dest_ctrl |= (INDEX1[src]<<4);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
232 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
233
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
234 if (dst & EXTOUT) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
235 dest_ctrl &= 0xF0FF;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
236 dest_ctrl |= (INDEX1[src]<<8);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
237 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
238
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
239 if (dst & DAC) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
240 dev_ctrl &= 0x0FFF;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
241 dev_ctrl |= MASK1[sclk];
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
242 dest_ctrl &= 0x0FFF;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
243 dest_ctrl |= (INDEX2[src]<<12);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
244 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
245
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
246 sync_div = DMAAUDIO_IO.sync_div;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
247 if (sclk==CLKEXT) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
248 pre<<=8;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
249 sync_div &= 0xF0FF;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
250 } else {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
251 sync_div &= 0xFFF0;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
252 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
253 sync_div |= pre;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
254
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
255 DMAAUDIO_IO.dev_ctrl = dev_ctrl;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
256 DMAAUDIO_IO.dest_ctrl = dest_ctrl;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
257 DMAAUDIO_IO.sync_div = sync_div;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
258
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
259 Super(oldstack);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
260 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
261
1107
856f76a099c7 Can use both clocks of FDI interface on Falcon, plus digital output
Patrice Mandin <patmandin@gmail.com>
parents: 1106
diff changeset
262 static void Mint_CheckExternalClock(_THIS)
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
263 {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
264 #define SIZE_BUF_CLOCK_MEASURE (44100/10)
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
265
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
266 unsigned long cookie_snd;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
267 char *buffer;
1107
856f76a099c7 Can use both clocks of FDI interface on Falcon, plus digital output
Patrice Mandin <patmandin@gmail.com>
parents: 1106
diff changeset
268 int i, j;
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
269
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
270 /* DSP present with its GPIO port ? */
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
271 if (Getcookie(C__SND, &cookie_snd) == C_NOTFOUND) {
1107
856f76a099c7 Can use both clocks of FDI interface on Falcon, plus digital output
Patrice Mandin <patmandin@gmail.com>
parents: 1106
diff changeset
272 return;
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
273 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
274 if ((cookie_snd & SND_DSP)==0) {
1107
856f76a099c7 Can use both clocks of FDI interface on Falcon, plus digital output
Patrice Mandin <patmandin@gmail.com>
parents: 1106
diff changeset
275 return;
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
276 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
277
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
278 buffer = Atari_SysMalloc(SIZE_BUF_CLOCK_MEASURE, MX_STRAM);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
279 if (buffer==NULL) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
280 DEBUG_PRINT((DEBUG_NAME "Not enough memory for the measure\n"));
1107
856f76a099c7 Can use both clocks of FDI interface on Falcon, plus digital output
Patrice Mandin <patmandin@gmail.com>
parents: 1106
diff changeset
281 return;
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
282 }
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents: 1111
diff changeset
283 SDL_memset(buffer, 0, SIZE_BUF_CLOCK_MEASURE);
961
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 Buffoper(0);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
286 Settracks(0,0);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
287 Setmontracks(0);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
288 Setmode(MONO8);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
289 Jdisint(MFP_TIMERA);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
290
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
291 for (i=0; i<2; i++) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
292 Gpio(GPIO_SET,7); /* DSP port gpio outputs */
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diff changeset
293 Gpio(GPIO_WRITE,2+i); /* 22.5792/24.576 MHz for 44.1/48KHz */
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diff changeset
294 Devconnect2(DMAPLAY, DAC, CLKEXT, CLK50K); /* Matrix and clock source */
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diff changeset
295 Setbuffer(0, buffer, buffer + SIZE_BUF_CLOCK_MEASURE); /* Set buffer */
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diff changeset
296 Xbtimer(XB_TIMERA, 5, 38, SDL_MintAudio_XbiosInterruptMeasureClock); /* delay mode timer A, prediv /64, 1KHz */
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diff changeset
297 Jenabint(MFP_TIMERA);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
298 SDL_MintAudio_clocktics = 0;
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diff changeset
299 Buffoper(SB_PLA_ENA);
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diff changeset
300 usleep(110000);
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301
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diff changeset
302 if((Buffoper(-1) & 1)==0) {
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diff changeset
303 if (SDL_MintAudio_clocktics) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
304 unsigned long khz;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
305
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
306 khz = ((SIZE_BUF_CLOCK_MEASURE/SDL_MintAudio_clocktics) +1) & 0xFFFFFFFE;
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diff changeset
307 DEBUG_PRINT((DEBUG_NAME "measure %d: freq=%lu KHz\n", i+1, khz));
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308
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diff changeset
309 if(khz==44) {
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diff changeset
310 for (j=1; j<4; j++) {
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diff changeset
311 SDL_MintAudio_AddFrequency(this, MASTERCLOCK_44K/(MASTERPREDIV_FALCON*(1<<j)), MASTERCLOCK_44K, (1<<j)-1, 2+i);
961
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312 }
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313 } else if (khz==48) {
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diff changeset
314 for (j=1; j<4; j++) {
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diff changeset
315 SDL_MintAudio_AddFrequency(this, MASTERCLOCK_48K/(MASTERPREDIV_FALCON*(1<<j)), MASTERCLOCK_48K, (1<<j)-1, 2+i);
961
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316 }
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317 }
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318 } else {
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319 DEBUG_PRINT((DEBUG_NAME "No measure\n"));
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320 }
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321 } else {
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diff changeset
322 DEBUG_PRINT((DEBUG_NAME "No SDMA clock\n"));
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323 }
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324
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325 Buffoper(0); /* stop */
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diff changeset
326 Jdisint(MFP_TIMERA); /* Uninstall interrupt */
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327 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
328
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diff changeset
329 Mfree(buffer);
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330 }
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331
644
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332 static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec)
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333 {
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diff changeset
334 int i;
961
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diff changeset
335 Uint32 extclock;
644
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336
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337 DEBUG_PRINT((DEBUG_NAME "asked: %d bits, ",spec->format & 0x00ff));
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338 DEBUG_PRINT(("signed=%d, ", ((spec->format & 0x8000)!=0)));
704
c4803992e09c Small bugfixes
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diff changeset
339 DEBUG_PRINT(("big endian=%d, ", ((spec->format & 0x1000)!=0)));
644
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diff changeset
340 DEBUG_PRINT(("channels=%d, ", spec->channels));
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diff changeset
341 DEBUG_PRINT(("freq=%d\n", spec->freq));
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342
594422ab8f9f Atari MiNT: added more audio drivers
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diff changeset
343 spec->format |= 0x8000; /* Audio is always signed */
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diff changeset
344 if ((spec->format & 0x00ff)==16) {
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diff changeset
345 spec->format |= 0x1000; /* Audio is always big endian */
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diff changeset
346 spec->channels=2; /* 16 bits always stereo */
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diff changeset
347 }
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348
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diff changeset
349 MINTAUDIO_freqcount=0;
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diff changeset
350
856f76a099c7 Can use both clocks of FDI interface on Falcon, plus digital output
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diff changeset
351 /* Add external clocks if present */
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diff changeset
352 Mint_CheckExternalClock(this);
961
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diff changeset
353
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
354 /* Standard clocks */
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
355 for (i=1;i<12;i++) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
356 /* Remove unusable Falcon codec predivisors */
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
357 if ((i==6) || (i==8) || (i==10)) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
358 continue;
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diff changeset
359 }
1107
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diff changeset
360 SDL_MintAudio_AddFrequency(this, MASTERCLOCK_FALCON1/(MASTERPREDIV_FALCON*(i+1)), MASTERCLOCK_FALCON1, i, -1);
961
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diff changeset
361 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
362
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
363 #if 1
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
364 for (i=0; i<MINTAUDIO_freqcount; i++) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
365 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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diff changeset
366 i, MINTAUDIO_frequencies[i].frequency, MINTAUDIO_frequencies[i].masterclock,
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
367 MINTAUDIO_frequencies[i].predivisor
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
368 ));
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
369 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
370 #endif
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
371
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diff changeset
372 MINTAUDIO_numfreq=SDL_MintAudio_SearchFrequency(this, spec->freq);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
373 spec->freq=MINTAUDIO_frequencies[MINTAUDIO_numfreq].frequency;
644
594422ab8f9f Atari MiNT: added more audio drivers
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diff changeset
374
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diff changeset
375 DEBUG_PRINT((DEBUG_NAME "obtained: %d bits, ",spec->format & 0x00ff));
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
376 DEBUG_PRINT(("signed=%d, ", ((spec->format & 0x8000)!=0)));
704
c4803992e09c Small bugfixes
Patrice Mandin <patmandin@gmail.com>
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diff changeset
377 DEBUG_PRINT(("big endian=%d, ", ((spec->format & 0x1000)!=0)));
644
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
378 DEBUG_PRINT(("channels=%d, ", spec->channels));
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
379 DEBUG_PRINT(("freq=%d\n", spec->freq));
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
380
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diff changeset
381 return 0;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
382 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
383
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
384 static void Mint_InitAudio(_THIS, SDL_AudioSpec *spec)
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
385 {
961
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diff changeset
386 int channels_mode, dmaclock, prediv;
644
594422ab8f9f Atari MiNT: added more audio drivers
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diff changeset
387 void *buffer;
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 /* Stop currently playing sound */
1111
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
Patrice Mandin <patmandin@gmail.com>
parents: 1107
diff changeset
390 SDL_MintAudio_quit_thread = SDL_FALSE;
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
Patrice Mandin <patmandin@gmail.com>
parents: 1107
diff changeset
391 SDL_MintAudio_thread_finished = SDL_TRUE;
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
Patrice Mandin <patmandin@gmail.com>
parents: 1107
diff changeset
392 SDL_MintAudio_WaitThread();
644
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
393 Buffoper(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 /* Set replay tracks */
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
396 Settracks(0,0);
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
397 Setmontracks(0);
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
398
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
399 /* Select replay format */
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
400 channels_mode=STEREO16;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
401 switch (spec->format & 0xff) {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
402 case 8:
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
403 if (spec->channels==2) {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
404 channels_mode=STEREO8;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
405 } else {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
406 channels_mode=MONO8;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
407 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
408 break;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
409 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
410 if (Setmode(channels_mode)<0) {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
411 DEBUG_PRINT((DEBUG_NAME "Setmode() failed\n"));
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
412 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
413
961
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diff changeset
414 dmaclock = MINTAUDIO_frequencies[MINTAUDIO_numfreq].masterclock;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
415 prediv = MINTAUDIO_frequencies[MINTAUDIO_numfreq].predivisor;
1107
856f76a099c7 Can use both clocks of FDI interface on Falcon, plus digital output
Patrice Mandin <patmandin@gmail.com>
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diff changeset
416 if (MINTAUDIO_frequencies[MINTAUDIO_numfreq].gpio_bits != -1) {
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
417 Gpio(GPIO_SET,7); /* DSP port gpio outputs */
1107
856f76a099c7 Can use both clocks of FDI interface on Falcon, plus digital output
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diff changeset
418 Gpio(GPIO_WRITE, MINTAUDIO_frequencies[MINTAUDIO_numfreq].gpio_bits);
856f76a099c7 Can use both clocks of FDI interface on Falcon, plus digital output
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diff changeset
419 Devconnect2(DMAPLAY, DAC|EXTOUT, CLKEXT, prediv);
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
420 } else {
1100
76459577e620 Checking external clock on DSP port was leaving audio crossbar in limbo state
Patrice Mandin <patmandin@gmail.com>
parents: 1095
diff changeset
421 Devconnect2(DMAPLAY, DAC, CLK25M, prediv);
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
422 }
644
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
423
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
424 /* Set buffer */
594422ab8f9f Atari MiNT: added more audio drivers
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diff changeset
425 buffer = SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf];
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
426 if (Setbuffer(0, buffer, buffer + spec->size)<0) {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
427 DEBUG_PRINT((DEBUG_NAME "Setbuffer() failed\n"));
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
428 }
594422ab8f9f Atari MiNT: added more audio drivers
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429
1111
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
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parents: 1107
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430 if (SDL_MintAudio_mint_present) {
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431 SDL_MintAudio_thread_pid = tfork(SDL_MintAudio_Thread, 0);
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432 } else {
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parents: 1107
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433 /* Install interrupt */
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parents: 1107
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434 Jdisint(MFP_DMASOUND);
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parents: 1107
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435 Xbtimer(XB_TIMERA, 8, 1, SDL_MintAudio_XbiosInterrupt);
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parents: 1107
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436 Jenabint(MFP_DMASOUND);
644
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437
1111
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parents: 1107
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438 if (Setinterrupt(SI_TIMERA, SI_PLAY)<0) {
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
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parents: 1107
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439 DEBUG_PRINT((DEBUG_NAME "Setinterrupt() failed\n"));
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
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parents: 1107
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440 }
644
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441 }
594422ab8f9f Atari MiNT: added more audio drivers
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442
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443 /* Go */
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444 Buffoper(SB_PLA_ENA|SB_PLA_RPT);
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445 DEBUG_PRINT((DEBUG_NAME "hardware initialized\n"));
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446 }
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447
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448 static int Mint_OpenAudio(_THIS, SDL_AudioSpec *spec)
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449 {
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450 /* Lock sound system */
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451 if (Locksnd()!=1) {
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452 SDL_SetError("Mint_OpenAudio: Audio system already in use");
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453 return(-1);
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454 }
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455
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456 SDL_MintAudio_device = this;
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457
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458 /* Check audio capabilities */
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459 if (Mint_CheckAudio(this, spec)==-1) {
594422ab8f9f Atari MiNT: added more audio drivers
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460 return -1;
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parents:
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461 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
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462
594422ab8f9f Atari MiNT: added more audio drivers
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463 SDL_CalculateAudioSpec(spec);
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
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464
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Patrice Mandin <patmandin@gmail.com>
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465 /* Allocate memory for audio buffers in DMA-able RAM */
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parents:
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466 DEBUG_PRINT((DEBUG_NAME "buffer size=%d\n", spec->size));
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
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467
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468 SDL_MintAudio_audiobuf[0] = Atari_SysMalloc(spec->size *2, MX_STRAM);
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
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469 if (SDL_MintAudio_audiobuf[0]==NULL) {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
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470 SDL_SetError("MINT_OpenAudio: Not enough memory for audio buffer");
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471 return (-1);
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
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472 }
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
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473 SDL_MintAudio_audiobuf[1] = SDL_MintAudio_audiobuf[0] + spec->size ;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
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474 SDL_MintAudio_numbuf=0;
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents: 1111
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475 SDL_memset(SDL_MintAudio_audiobuf[0], spec->silence, spec->size *2);
644
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
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476 SDL_MintAudio_audiosize = spec->size;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
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477 SDL_MintAudio_mutex = 0;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
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478
594422ab8f9f Atari MiNT: added more audio drivers
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479 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:
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480 DEBUG_PRINT((DEBUG_NAME "buffer 1 at 0x%08x\n", SDL_MintAudio_audiobuf[1]));
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
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481
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
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482 /* Setup audio hardware */
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
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483 Mint_InitAudio(this, spec);
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
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484
1111
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
Patrice Mandin <patmandin@gmail.com>
parents: 1107
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485 return(1); /* We don't use SDL threaded audio */
644
594422ab8f9f Atari MiNT: added more audio drivers
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486 }