Mercurial > sdl-ios-xcode

annotate src/audio/mint/SDL_mintaudio_xbios.c @ 1100:76459577e620

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Checking external clock on DSP port was leaving audio crossbar in limbo state
author Patrice Mandin <patmandin@gmail.com>
date Thu, 21 Jul 2005 21:33:15 +0000
parents f10892fa2e48
children 524fd51f5d2c
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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b8d311d90021 Updated copyright information for 2004 (Happy New Year!)
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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 <stdlib.h>
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31 #include <stdio.h>
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32 #include <string.h>
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33 #include <unistd.h>
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34
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35 /* Mint includes */
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36 #include <mint/osbind.h>
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37 #include <mint/falcon.h>
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38 #include <mint/cookie.h>
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39
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40 #include "SDL_endian.h"
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41 #include "SDL_audio.h"
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42 #include "SDL_audio_c.h"
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43 #include "SDL_audiomem.h"
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44 #include "SDL_sysaudio.h"
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45
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46 #include "SDL_atarimxalloc_c.h"
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47
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48 #include "SDL_mintaudio.h"
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49 #include "SDL_mintaudio_dma8.h"
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50
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51 /*--- Defines ---*/
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52
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53 #define MINT_AUDIO_DRIVER_NAME "mint_xbios"
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54
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55 /* Debug print info */
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56 #define DEBUG_NAME "audio:xbios: "
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57 #if 0
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58 #define DEBUG_PRINT(what) \
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59 { \
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60 printf what; \
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61 }
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62 #else
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63 #define DEBUG_PRINT(what)
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64 #endif
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65
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66 /*--- Static variables ---*/
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67
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68 static unsigned long cookie_snd;
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69
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70 /*--- Audio driver functions ---*/
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71
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72 static void Mint_CloseAudio(_THIS);
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73 static int Mint_OpenAudio(_THIS, SDL_AudioSpec *spec);
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74 static void Mint_LockAudio(_THIS);
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75 static void Mint_UnlockAudio(_THIS);
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76
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77 /* To check/init hardware audio */
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78 static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec);
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79 static void Mint_InitAudio(_THIS, SDL_AudioSpec *spec);
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80
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81 /*--- Audio driver bootstrap functions ---*/
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82
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83 static int Audio_Available(void)
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84 {
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85 unsigned long dummy;
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86 const char *envr = getenv("SDL_AUDIODRIVER");
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87
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88 /* We can't use XBIOS in interrupt under MiNT */
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89 if (Getcookie(C_MiNT, &dummy) == C_FOUND) {
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90 return(0);
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91 }
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92
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93 /* Check if user asked a different audio driver */
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94 if ((envr) && (strcmp(envr, MINT_AUDIO_DRIVER_NAME)!=0)) {
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95 DEBUG_PRINT((DEBUG_NAME "user asked a different audio driver\n"));
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96 return(0);
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97 }
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98
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99 /* Cookie _SND present ? if not, assume ST machine */
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100 if (Getcookie(C__SND, &cookie_snd) == C_NOTFOUND) {
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101 cookie_snd = SND_PSG;
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102 }
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103
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104 /* Check if we have 16 bits audio */
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105 if ((cookie_snd & SND_16BIT)==0) {
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106 DEBUG_PRINT((DEBUG_NAME "no 16 bits sound\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 "XBIOS 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 free(device->hidden);
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125 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 *)malloc(sizeof(SDL_AudioDevice));
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134 if ( this ) {
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135 memset(this, 0, (sizeof *this));
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136 this->hidden = (struct SDL_PrivateAudioData *)
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137 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 free(this);
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143 }
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144 return(0);
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145 }
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146 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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150 this->CloseAudio = Mint_CloseAudio;
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151 this->LockAudio = Mint_LockAudio;
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diff changeset
152 this->UnlockAudio = Mint_UnlockAudio;
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diff changeset
153 this->free = Audio_DeleteDevice;
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diff changeset
154
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diff changeset
155 return this;
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diff changeset
156 }
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diff changeset
157
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diff changeset
158 AudioBootStrap MINTAUDIO_XBIOS_bootstrap = {
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diff changeset
159 MINT_AUDIO_DRIVER_NAME, "MiNT XBIOS audio driver",
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diff changeset
160 Audio_Available, Audio_CreateDevice
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diff changeset
161 };
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diff changeset
162
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diff changeset
163 static void Mint_LockAudio(_THIS)
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parents:
diff changeset
164 {
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diff changeset
165 /* Stop replay */
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diff changeset
166 Buffoper(0);
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diff changeset
167 }
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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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diff changeset
171 /* Restart replay */
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parents:
diff changeset
172 Buffoper(SB_PLA_ENA|SB_PLA_RPT);
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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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parents:
diff changeset
176 {
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diff changeset
177 /* Stop replay */
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diff changeset
178 Buffoper(0);
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179
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diff changeset
180 /* Uninstall interrupt */
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diff changeset
181 Jdisint(MFP_DMASOUND);
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182
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diff changeset
183 /* Wait if currently playing sound */
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parents:
diff changeset
184 while (SDL_MintAudio_mutex != 0) {
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parents:
diff changeset
185 }
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parents:
diff changeset
186
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diff changeset
187 /* Clear buffers */
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parents:
diff changeset
188 if (SDL_MintAudio_audiobuf[0]) {
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Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
189 Mfree(SDL_MintAudio_audiobuf[0]);
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parents:
diff changeset
190 SDL_MintAudio_audiobuf[0] = SDL_MintAudio_audiobuf[1] = NULL;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
191 }
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diff changeset
192
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parents:
diff changeset
193 /* Unlock sound system */
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Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
194 Unlocksnd();
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
195 }
594422ab8f9f Atari MiNT: added more audio drivers
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diff changeset
196
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
197 /* Falcon XBIOS implementation of Devconnect() is buggy with external clock */
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
198 static void Devconnect2(int src, int dst, int sclk, int pre)
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
199 {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
200 static const unsigned short MASK1[3] = { 0, 0x6000, 0 };
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
201 static const unsigned short MASK2[4] = { 0xFFF0, 0xFF8F, 0xF0FF, 0x0FFF };
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
202 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
203 static const unsigned short INDEX2[4] = { 0, 2, 4, 6 };
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
204 unsigned short sync_div,dev_ctrl,dest_ctrl;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
205 void *oldstack;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
206
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
207 if (dst==0) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
208 return;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
209 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
210
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
211 oldstack=(void *)Super(0);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
212
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
213 dev_ctrl = DMAAUDIO_IO.dev_ctrl;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
214 dest_ctrl = DMAAUDIO_IO.dest_ctrl;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
215 dev_ctrl &= MASK2[src];
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
216
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
217 if (src==ADC) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
218 dev_ctrl |= MASK1[sclk];
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
219 } else {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
220 dev_ctrl |= (INDEX1[sclk] << (src<<4));
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
221 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
222
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
223 if (dst & DMAREC) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
224 dest_ctrl &= 0xFFF0;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
225 dest_ctrl |= INDEX1[src];
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
226 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
227
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
228 if (dst & DSPRECV) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
229 dest_ctrl &= 0xFF8F;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
230 dest_ctrl |= (INDEX1[src]<<4);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
231 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
232
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
233 if (dst & EXTOUT) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
234 dest_ctrl &= 0xF0FF;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
235 dest_ctrl |= (INDEX1[src]<<8);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
236 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
237
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
238 if (dst & DAC) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
239 dev_ctrl &= 0x0FFF;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
240 dev_ctrl |= MASK1[sclk];
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
241 dest_ctrl &= 0x0FFF;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
242 dest_ctrl |= (INDEX2[src]<<12);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
243 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
244
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
245 sync_div = DMAAUDIO_IO.sync_div;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
246 if (sclk==CLKEXT) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
247 pre<<=8;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
248 sync_div &= 0xF0FF;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
249 } else {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
250 sync_div &= 0xFFF0;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
251 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
252 sync_div |= pre;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
253
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
254 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
255 DMAAUDIO_IO.dest_ctrl = dest_ctrl;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
256 DMAAUDIO_IO.sync_div = sync_div;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
257
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
258 Super(oldstack);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
259 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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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 static Uint32 Mint_CheckExternalClock(void)
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
262 {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
263 #define SIZE_BUF_CLOCK_MEASURE (44100/10)
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
264
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
265 unsigned long cookie_snd;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
266 Uint32 masterclock;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
267 char *buffer;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
268 int i;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
269
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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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) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
272 return 0;
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) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
275 return 0;
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"));
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
281 return 0;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
282 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
283 memset(buffer, 0, SIZE_BUF_CLOCK_MEASURE);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
284
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
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diff changeset
285 masterclock=0;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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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 Buffoper(0);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
288 Settracks(0,0);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
289 Setmontracks(0);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
290 Setmode(MONO8);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
291 Jdisint(MFP_TIMERA);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
292
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
293 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
294 Gpio(GPIO_SET,7); /* DSP port gpio outputs */
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
295 Gpio(GPIO_WRITE,2+i); /* 22.5792/24.576 MHz for 44.1/48KHz */
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
296 Devconnect2(DMAPLAY, DAC, CLKEXT, CLK50K); /* Matrix and clock source */
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
297 Setbuffer(0, buffer, buffer + SIZE_BUF_CLOCK_MEASURE); /* Set buffer */
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
298 Xbtimer(XB_TIMERA, 5, 38, SDL_MintAudio_XbiosInterruptMeasureClock); /* delay mode timer A, prediv /64, 1KHz */
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
299 Jenabint(MFP_TIMERA);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
300 SDL_MintAudio_clocktics = 0;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
301 Buffoper(SB_PLA_ENA);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
302 usleep(110000);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
303
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
304 if((Buffoper(-1) & 1)==0) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
305 if (SDL_MintAudio_clocktics) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
306 unsigned long khz;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
307
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
308 khz = ((SIZE_BUF_CLOCK_MEASURE/SDL_MintAudio_clocktics) +1) & 0xFFFFFFFE;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
309 DEBUG_PRINT((DEBUG_NAME "measure %d: freq=%lu KHz\n", i+1, khz));
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
310
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
311 if (i==0) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
312 if(khz==44) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
313 masterclock = MASTERCLOCK_44K;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
314 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
315 } else {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
316 if(khz==48) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
317 masterclock = MASTERCLOCK_48K;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
318 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
319 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
320 } else {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
321 DEBUG_PRINT((DEBUG_NAME "No measure\n"));
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
322 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
323 } else {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
324 DEBUG_PRINT((DEBUG_NAME "No SDMA clock\n"));
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
325 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
326
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
327 Buffoper(0); /* stop */
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
328 Jdisint(MFP_TIMERA); /* Uninstall interrupt */
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
329 if (masterclock == 0)
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
330 break;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
331 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
332
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
333 Mfree(buffer);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
334 return masterclock;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
335 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
336
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
337 static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec)
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
338 {
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
339 int i;
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
340 Uint32 extclock;
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
341
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
342 DEBUG_PRINT((DEBUG_NAME "asked: %d bits, ",spec->format & 0x00ff));
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
343 DEBUG_PRINT(("signed=%d, ", ((spec->format & 0x8000)!=0)));
704
c4803992e09c Small bugfixes
Patrice Mandin <patmandin@gmail.com>
parents: 644
diff changeset
344 DEBUG_PRINT(("big endian=%d, ", ((spec->format & 0x1000)!=0)));
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
345 DEBUG_PRINT(("channels=%d, ", spec->channels));
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
346 DEBUG_PRINT(("freq=%d\n", spec->freq));
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
347
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
348 spec->format |= 0x8000; /* Audio is always signed */
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
349 if ((spec->format & 0x00ff)==16) {
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
350 spec->format |= 0x1000; /* Audio is always big endian */
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
351 spec->channels=2; /* 16 bits always stereo */
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
352 }
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
353
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
354 extclock=Mint_CheckExternalClock();
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
355
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
356 /* Standard clocks */
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
357 MINTAUDIO_freqcount=0;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
358 for (i=1;i<12;i++) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
359 /* Remove unusable Falcon codec predivisors */
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
360 if ((i==6) || (i==8) || (i==10)) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
361 continue;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
362 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
363 SDL_MintAudio_AddFrequency(this, MASTERCLOCK_FALCON1/(MASTERPREDIV_FALCON*(i+1)), MASTERCLOCK_FALCON1, i);
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
364 }
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
365
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
366 if (extclock>0) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
367 for (i=1; i<4; i++) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
368 SDL_MintAudio_AddFrequency(this, extclock/(MASTERPREDIV_FALCON*(1<<i)), extclock, (1<<i)-1);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
369 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
370 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
371
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
372 #if 1
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
373 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
374 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
375 i, MINTAUDIO_frequencies[i].frequency, MINTAUDIO_frequencies[i].masterclock,
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
376 MINTAUDIO_frequencies[i].predivisor
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
377 ));
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
378 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
379 #endif
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
380
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
381 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
382 spec->freq=MINTAUDIO_frequencies[MINTAUDIO_numfreq].frequency;
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
383
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
384 DEBUG_PRINT((DEBUG_NAME "obtained: %d bits, ",spec->format & 0x00ff));
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
385 DEBUG_PRINT(("signed=%d, ", ((spec->format & 0x8000)!=0)));
704
c4803992e09c Small bugfixes
Patrice Mandin <patmandin@gmail.com>
parents: 644
diff changeset
386 DEBUG_PRINT(("big endian=%d, ", ((spec->format & 0x1000)!=0)));
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
387 DEBUG_PRINT(("channels=%d, ", spec->channels));
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
388 DEBUG_PRINT(("freq=%d\n", spec->freq));
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
389
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
390 return 0;
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
391 }
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
392
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
393 static void Mint_InitAudio(_THIS, SDL_AudioSpec *spec)
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
394 {
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
395 int channels_mode, dmaclock, prediv;
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
396 void *buffer;
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
397
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
398 /* Stop currently playing sound */
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
399 Buffoper(0);
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
400
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
401 /* Set replay tracks */
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
402 Settracks(0,0);
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
403 Setmontracks(0);
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
404
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
405 /* Select replay format */
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
406 channels_mode=STEREO16;
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
407 switch (spec->format & 0xff) {
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
408 case 8:
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
409 if (spec->channels==2) {
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
410 channels_mode=STEREO8;
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
411 } else {
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
412 channels_mode=MONO8;
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
413 }
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
414 break;
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
415 }
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
416 if (Setmode(channels_mode)<0) {
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
417 DEBUG_PRINT((DEBUG_NAME "Setmode() failed\n"));
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
418 }
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
419
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
420 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
421 prediv = MINTAUDIO_frequencies[MINTAUDIO_numfreq].predivisor;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
422 if (dmaclock != MASTERCLOCK_FALCON1) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
423 Gpio(GPIO_SET,7); /* DSP port gpio outputs */
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
424 if (dmaclock == MASTERCLOCK_44K) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
425 Gpio(GPIO_WRITE,2); /* 22.5792 MHz for 44.1KHz */
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
426 } else {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
427 Gpio(GPIO_WRITE,3); /* 24.576 MHz for 48KHz */
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
428 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
429 Devconnect2(DMAPLAY, DAC, CLKEXT, prediv);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
430 } 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
431 Devconnect2(DMAPLAY, DAC, CLK25M, prediv);
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
432 }
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
433
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
434 /* Set buffer */
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
435 buffer = SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf];
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
436 if (Setbuffer(0, buffer, buffer + spec->size)<0) {
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
437 DEBUG_PRINT((DEBUG_NAME "Setbuffer() failed\n"));
594422ab8f9f Atari MiNT: added more audio drivers
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438 }
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439
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440 /* Install interrupt */
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441 Jdisint(MFP_DMASOUND);
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442 Xbtimer(XB_TIMERA, 8, 1, SDL_MintAudio_XbiosInterrupt);
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443 Jenabint(MFP_DMASOUND);
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444
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445 if (Setinterrupt(SI_TIMERA, SI_PLAY)<0) {
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446 DEBUG_PRINT((DEBUG_NAME "Setinterrupt() failed\n"));
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447 }
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448
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449 /* Go */
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450 Buffoper(SB_PLA_ENA|SB_PLA_RPT);
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451 DEBUG_PRINT((DEBUG_NAME "hardware initialized\n"));
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452 }
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453
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454 static int Mint_OpenAudio(_THIS, SDL_AudioSpec *spec)
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455 {
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456 /* Lock sound system */
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457 if (Locksnd()!=1) {
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458 SDL_SetError("Mint_OpenAudio: Audio system already in use");
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459 return(-1);
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460 }
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461
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462 SDL_MintAudio_device = this;
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463
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464 /* Check audio capabilities */
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465 if (Mint_CheckAudio(this, spec)==-1) {
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466 return -1;
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467 }
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468
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469 SDL_CalculateAudioSpec(spec);
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470
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471 /* Allocate memory for audio buffers in DMA-able RAM */
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472 DEBUG_PRINT((DEBUG_NAME "buffer size=%d\n", spec->size));
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473
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474 SDL_MintAudio_audiobuf[0] = Atari_SysMalloc(spec->size *2, MX_STRAM);
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475 if (SDL_MintAudio_audiobuf[0]==NULL) {
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476 SDL_SetError("MINT_OpenAudio: Not enough memory for audio buffer");
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477 return (-1);
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478 }
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479 SDL_MintAudio_audiobuf[1] = SDL_MintAudio_audiobuf[0] + spec->size ;
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480 SDL_MintAudio_numbuf=0;
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481 memset(SDL_MintAudio_audiobuf[0], spec->silence, spec->size *2);
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482 SDL_MintAudio_audiosize = spec->size;
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483 SDL_MintAudio_mutex = 0;
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484
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485 DEBUG_PRINT((DEBUG_NAME "buffer 0 at 0x%08x\n", SDL_MintAudio_audiobuf[0]));
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486 DEBUG_PRINT((DEBUG_NAME "buffer 1 at 0x%08x\n", SDL_MintAudio_audiobuf[1]));
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487
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488 /* Setup audio hardware */
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489 Mint_InitAudio(this, spec);
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490
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491 return(1); /* We don't use threaded audio */
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492 }