Mercurial > sdl-ios-xcode

annotate src/audio/mint/SDL_mintaudio_gsxb.c @ 1338:604d73db6802

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Removed uses of stdlib.h and string.h
author Sam Lantinga <slouken@libsdl.org>
date Tue, 07 Feb 2006 09:29:18 +0000
parents 3692456e7b0f
children c71e05b4dc2e
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 (GSXB compatible driver)
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26
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27 Patrice Mandin
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28 */
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29
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30 /* Mint includes */
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31 #include <mint/osbind.h>
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32 #include <mint/falcon.h>
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33 #include <mint/cookie.h>
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34
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35 #include "SDL_stdlib.h"
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36 #include "SDL_string.h"
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37 #include "SDL_endian.h"
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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_audiomem.h"
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41 #include "SDL_sysaudio.h"
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42
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43 #include "SDL_atarimxalloc_c.h"
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44
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45 #include "SDL_mintaudio.h"
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46 #include "SDL_mintaudio_gsxb.h"
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47
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48 /*--- Defines ---*/
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49
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50 #define MINT_AUDIO_DRIVER_NAME "mint_gsxb"
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51
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52 /* Debug print info */
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53 #define DEBUG_NAME "audio:gsxb: "
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54 #if 0
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55 #define DEBUG_PRINT(what) \
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56 { \
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57 printf what; \
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58 }
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59 #else
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60 #define DEBUG_PRINT(what)
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61 #endif
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62
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63 /*--- Static variables ---*/
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64
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65 static unsigned long cookie_snd, cookie_gsxb;
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66
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67 /*--- Audio driver functions ---*/
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68
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69 static void Mint_CloseAudio(_THIS);
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70 static int Mint_OpenAudio(_THIS, SDL_AudioSpec *spec);
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71 static void Mint_LockAudio(_THIS);
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72 static void Mint_UnlockAudio(_THIS);
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73
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74 /* To check/init hardware audio */
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75 static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec);
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76 static void Mint_InitAudio(_THIS, SDL_AudioSpec *spec);
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77
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78 /* GSXB callbacks */
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79 static void Mint_GsxbInterrupt(void);
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80 static void Mint_GsxbNullInterrupt(void);
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81
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82 /*--- Audio driver bootstrap functions ---*/
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83
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84 static int Audio_Available(void)
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85 {
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86 const char *envr = SDL_getenv("SDL_AUDIODRIVER");
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87
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88 /* Check if user asked a different audio driver */
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89 if ((envr) && (SDL_strcmp(envr, MINT_AUDIO_DRIVER_NAME)!=0)) {
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90 DEBUG_PRINT((DEBUG_NAME "user asked a different audio driver\n"));
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91 return(0);
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92 }
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93
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94 /* Cookie _SND present ? if not, assume ST machine */
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95 if (Getcookie(C__SND, &cookie_snd) == C_NOTFOUND) {
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96 cookie_snd = SND_PSG;
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97 }
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98
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99 /* Check if we have 16 bits audio */
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100 if ((cookie_snd & SND_16BIT)==0) {
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101 DEBUG_PRINT((DEBUG_NAME "no 16 bits sound\n"));
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102 return(0);
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103 }
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104
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105 /* Cookie GSXB present ? */
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106 cookie_gsxb = (Getcookie(C_GSXB, &cookie_gsxb) == C_FOUND);
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107
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108 /* Is it GSXB ? */
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109 if (((cookie_snd & SND_GSXB)==0) || (cookie_gsxb==0)) {
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110 DEBUG_PRINT((DEBUG_NAME "no GSXB audio\n"));
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111 return(0);
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112 }
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113
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114 /* Check if audio is lockable */
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115 if (Locksnd()!=1) {
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116 DEBUG_PRINT((DEBUG_NAME "audio locked by other application\n"));
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117 return(0);
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118 }
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119
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120 Unlocksnd();
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121
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122 DEBUG_PRINT((DEBUG_NAME "GSXB audio available!\n"));
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123 return(1);
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124 }
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125
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126 static void Audio_DeleteDevice(SDL_AudioDevice *device)
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127 {
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128 SDL_free(device->hidden);
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129 SDL_free(device);
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130 }
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131
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132 static SDL_AudioDevice *Audio_CreateDevice(int devindex)
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133 {
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134 SDL_AudioDevice *this;
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135
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136 /* Initialize all variables that we clean on shutdown */
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137 this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice));
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138 if ( this ) {
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139 SDL_memset(this, 0, (sizeof *this));
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140 this->hidden = (struct SDL_PrivateAudioData *)
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141 SDL_malloc((sizeof *this->hidden));
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142 }
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143 if ( (this == NULL) || (this->hidden == NULL) ) {
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144 SDL_OutOfMemory();
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145 if ( this ) {
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146 SDL_free(this);
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147 }
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148 return(0);
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149 }
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3692456e7b0f Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents: 1107
diff changeset
150 SDL_memset(this->hidden, 0, (sizeof *this->hidden));
644
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diff changeset
151
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parents:
diff changeset
152 /* Set the function pointers */
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diff changeset
153 this->OpenAudio = Mint_OpenAudio;
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parents:
diff changeset
154 this->CloseAudio = Mint_CloseAudio;
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parents:
diff changeset
155 this->LockAudio = Mint_LockAudio;
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parents:
diff changeset
156 this->UnlockAudio = Mint_UnlockAudio;
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parents:
diff changeset
157 this->free = Audio_DeleteDevice;
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parents:
diff changeset
158
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parents:
diff changeset
159 return this;
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parents:
diff changeset
160 }
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parents:
diff changeset
161
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parents:
diff changeset
162 AudioBootStrap MINTAUDIO_GSXB_bootstrap = {
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parents:
diff changeset
163 MINT_AUDIO_DRIVER_NAME, "MiNT GSXB audio driver",
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parents:
diff changeset
164 Audio_Available, Audio_CreateDevice
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parents:
diff changeset
165 };
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
166
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parents:
diff changeset
167 static void Mint_LockAudio(_THIS)
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Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
168 {
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parents:
diff changeset
169 /* Stop replay */
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parents:
diff changeset
170 Buffoper(0);
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Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
171 }
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parents:
diff changeset
172
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parents:
diff changeset
173 static void Mint_UnlockAudio(_THIS)
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Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
174 {
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Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
175 /* Restart replay */
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Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
176 Buffoper(SB_PLA_ENA|SB_PLA_RPT);
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Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
177 }
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parents:
diff changeset
178
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Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
179 static void Mint_CloseAudio(_THIS)
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Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
180 {
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parents:
diff changeset
181 /* Stop replay */
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parents:
diff changeset
182 Buffoper(0);
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parents:
diff changeset
183
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parents:
diff changeset
184 /* Uninstall interrupt */
1097
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
185 if (NSetinterrupt(2, SI_NONE, Mint_GsxbNullInterrupt)<0) {
644
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
186 DEBUG_PRINT((DEBUG_NAME "NSetinterrupt() failed in close\n"));
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Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
187 }
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parents:
diff changeset
188
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Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
189 /* Wait if currently playing sound */
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Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
190 while (SDL_MintAudio_mutex != 0) {
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
191 }
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parents:
diff changeset
192
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Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
193 /* Clear buffers */
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Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
194 if (SDL_MintAudio_audiobuf[0]) {
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
195 Mfree(SDL_MintAudio_audiobuf[0]);
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
196 SDL_MintAudio_audiobuf[0] = SDL_MintAudio_audiobuf[1] = NULL;
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
197 }
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
198
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parents:
diff changeset
199 /* Unlock sound system */
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parents:
diff changeset
200 Unlocksnd();
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
201 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
202
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
203 static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec)
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
204 {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
205 long snd_format;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
206 int i, resolution, format_signed, format_bigendian;
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Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
207
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
208 resolution = spec->format & 0x00ff;
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parents:
diff changeset
209 format_signed = ((spec->format & 0x8000)!=0);
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
210 format_bigendian = ((spec->format & 0x1000)!=0);
704
c4803992e09c Small bugfixes
Patrice Mandin <patmandin@gmail.com>
parents: 644
diff changeset
211
c4803992e09c Small bugfixes
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parents: 644
diff changeset
212 DEBUG_PRINT((DEBUG_NAME "asked: %d bits, ",spec->format & 0x00ff));
c4803992e09c Small bugfixes
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parents: 644
diff changeset
213 DEBUG_PRINT(("signed=%d, ", ((spec->format & 0x8000)!=0)));
c4803992e09c Small bugfixes
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parents: 644
diff changeset
214 DEBUG_PRINT(("big endian=%d, ", ((spec->format & 0x1000)!=0)));
644
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
215 DEBUG_PRINT(("channels=%d, ", spec->channels));
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parents:
diff changeset
216 DEBUG_PRINT(("freq=%d\n", spec->freq));
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Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
217
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
218 /* Check formats available */
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parents:
diff changeset
219 snd_format = Sndstatus(SND_QUERYFORMATS);
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parents:
diff changeset
220 switch (resolution) {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
221 case 8:
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
222 if ((snd_format & SND_FORMAT8)==0) {
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parents:
diff changeset
223 SDL_SetError("Mint_CheckAudio: 8 bits samples not supported");
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parents:
diff changeset
224 return -1;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
225 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
226 snd_format = Sndstatus(SND_QUERY8BIT);
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parents:
diff changeset
227 break;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
228 case 16:
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
229 if ((snd_format & SND_FORMAT16)==0) {
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parents:
diff changeset
230 SDL_SetError("Mint_CheckAudio: 16 bits samples not supported");
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parents:
diff changeset
231 return -1;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
232 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
233 snd_format = Sndstatus(SND_QUERY16BIT);
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
234 break;
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parents:
diff changeset
235 default:
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
236 SDL_SetError("Mint_CheckAudio: Unsupported sample resolution");
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
237 return -1;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
238 break;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
239 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
240
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
241 /* Check signed/unsigned format */
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
242 if (format_signed) {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
243 if (snd_format & SND_FORMATSIGNED) {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
244 /* Ok */
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
245 } else if (snd_format & SND_FORMATUNSIGNED) {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
246 /* Give unsigned format */
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
247 spec->format = spec->format & (~0x8000);
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parents:
diff changeset
248 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
249 } else {
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
250 if (snd_format & SND_FORMATUNSIGNED) {
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
251 /* Ok */
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
252 } else if (snd_format & SND_FORMATSIGNED) {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
253 /* Give signed format */
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
254 spec->format |= 0x8000;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
255 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
256 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
257
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
258 if (format_bigendian) {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
259 if (snd_format & SND_FORMATBIGENDIAN) {
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
260 /* Ok */
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
261 } else if (snd_format & SND_FORMATLITTLEENDIAN) {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
262 /* Give little endian format */
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
263 spec->format = spec->format & (~0x1000);
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
264 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
265 } else {
704
c4803992e09c Small bugfixes
Patrice Mandin <patmandin@gmail.com>
parents: 644
diff changeset
266 if (snd_format & SND_FORMATLITTLEENDIAN) {
644
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
267 /* Ok */
704
c4803992e09c Small bugfixes
Patrice Mandin <patmandin@gmail.com>
parents: 644
diff changeset
268 } else if (snd_format & SND_FORMATBIGENDIAN) {
644
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
269 /* Give big endian format */
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
270 spec->format |= 0x1000;
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parents:
diff changeset
271 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
272 }
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parents:
diff changeset
273
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
274 /* Calculate and select the closest frequency */
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
275 MINTAUDIO_freqcount=0;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
276 for (i=1;i<4;i++) {
1107
856f76a099c7 Can use both clocks of FDI interface on Falcon, plus digital output
Patrice Mandin <patmandin@gmail.com>
parents: 1097
diff changeset
277 SDL_MintAudio_AddFrequency(this,
856f76a099c7 Can use both clocks of FDI interface on Falcon, plus digital output
Patrice Mandin <patmandin@gmail.com>
parents: 1097
diff changeset
278 MASTERCLOCK_44K/(MASTERPREDIV_MILAN*(1<<i)), MASTERCLOCK_44K,
856f76a099c7 Can use both clocks of FDI interface on Falcon, plus digital output
Patrice Mandin <patmandin@gmail.com>
parents: 1097
diff changeset
279 (1<<i)-1, -1);
644
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
280 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
281
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
282 #if 1
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
283 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
284 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
285 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
286 MINTAUDIO_frequencies[i].predivisor
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
287 ));
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
288 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
289 #endif
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 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
292 spec->freq=MINTAUDIO_frequencies[MINTAUDIO_numfreq].frequency;
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
293
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
294 DEBUG_PRINT((DEBUG_NAME "obtained: %d bits, ",spec->format & 0x00ff));
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
295 DEBUG_PRINT(("signed=%d, ", ((spec->format & 0x8000)!=0)));
704
c4803992e09c Small bugfixes
Patrice Mandin <patmandin@gmail.com>
parents: 644
diff changeset
296 DEBUG_PRINT(("big endian=%d, ", ((spec->format & 0x1000)!=0)));
644
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
297 DEBUG_PRINT(("channels=%d, ", spec->channels));
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
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diff changeset
298 DEBUG_PRINT(("freq=%d\n", spec->freq));
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diff changeset
299
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300 return 0;
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parents:
diff changeset
301 }
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parents:
diff changeset
302
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parents:
diff changeset
303 static void Mint_InitAudio(_THIS, SDL_AudioSpec *spec)
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Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
304 {
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
305 int channels_mode, prediv;
644
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parents:
diff changeset
306 void *buffer;
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307
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diff changeset
308 /* Stop currently playing sound */
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Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
309 Buffoper(0);
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diff changeset
310
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parents:
diff changeset
311 /* Set replay tracks */
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parents:
diff changeset
312 Settracks(0,0);
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diff changeset
313 Setmontracks(0);
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parents:
diff changeset
314
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parents:
diff changeset
315 /* Select replay format */
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parents:
diff changeset
316 switch (spec->format & 0xff) {
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parents:
diff changeset
317 case 8:
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parents:
diff changeset
318 if (spec->channels==2) {
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parents:
diff changeset
319 channels_mode=STEREO8;
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parents:
diff changeset
320 } else {
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parents:
diff changeset
321 channels_mode=MONO8;
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parents:
diff changeset
322 }
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parents:
diff changeset
323 break;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
324 case 16:
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diff changeset
325 if (spec->channels==2) {
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parents:
diff changeset
326 channels_mode=STEREO16;
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parents:
diff changeset
327 } else {
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parents:
diff changeset
328 channels_mode=MONO16;
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Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
329 }
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parents:
diff changeset
330 break;
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parents:
diff changeset
331 default:
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parents:
diff changeset
332 channels_mode=STEREO16;
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Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
333 break;
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parents:
diff changeset
334 }
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
335 if (Setmode(channels_mode)<0) {
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Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
336 DEBUG_PRINT((DEBUG_NAME "Setmode() failed\n"));
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
337 }
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
338
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
339 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
340 Devconnect(DMAPLAY, DAC, CLKEXT, prediv, 1);
644
594422ab8f9f Atari MiNT: added more audio drivers
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diff changeset
341
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
342 /* Set buffer */
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parents:
diff changeset
343 buffer = SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf];
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parents:
diff changeset
344 if (Setbuffer(0, buffer, buffer + spec->size)<0) {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
345 DEBUG_PRINT((DEBUG_NAME "Setbuffer() failed\n"));
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
346 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
347
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
348 /* Install interrupt */
1097
c83fa1c650dd Move GSXB callback to C source
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parents: 962
diff changeset
349 if (NSetinterrupt(2, SI_PLAY, Mint_GsxbInterrupt)<0) {
644
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
350 DEBUG_PRINT((DEBUG_NAME "NSetinterrupt() failed\n"));
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
351 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
352
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
353 /* Go */
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
354 Buffoper(SB_PLA_ENA|SB_PLA_RPT);
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
355 DEBUG_PRINT((DEBUG_NAME "hardware initialized\n"));
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
356 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
357
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
358 static int Mint_OpenAudio(_THIS, SDL_AudioSpec *spec)
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
359 {
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parents:
diff changeset
360 /* Lock sound system */
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
361 if (Locksnd()!=1) {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
362 SDL_SetError("Mint_OpenAudio: Audio system already in use");
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
363 return(-1);
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
364 }
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
365
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
366 SDL_MintAudio_device = this;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
367
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
368 /* Check audio capabilities */
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
369 if (Mint_CheckAudio(this, spec)==-1) {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
370 return -1;
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
371 }
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
372
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
373 SDL_CalculateAudioSpec(spec);
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
374
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
375 /* Allocate memory for audio buffers in DMA-able RAM */
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
376 DEBUG_PRINT((DEBUG_NAME "buffer size=%d\n", spec->size));
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
377
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
378 SDL_MintAudio_audiobuf[0] = Atari_SysMalloc(spec->size *2, MX_STRAM);
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
379 if (SDL_MintAudio_audiobuf[0]==NULL) {
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
380 SDL_SetError("MINT_OpenAudio: Not enough memory for audio buffer");
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
381 return (-1);
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
382 }
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
383 SDL_MintAudio_audiobuf[1] = SDL_MintAudio_audiobuf[0] + spec->size ;
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
384 SDL_MintAudio_numbuf=0;
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents: 1107
diff changeset
385 SDL_memset(SDL_MintAudio_audiobuf[0], spec->silence, spec->size *2);
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
386 SDL_MintAudio_audiosize = spec->size;
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
387 SDL_MintAudio_mutex = 0;
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
388
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
389 DEBUG_PRINT((DEBUG_NAME "buffer 0 at 0x%08x\n", SDL_MintAudio_audiobuf[0]));
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
390 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:
diff changeset
391
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
392 /* Setup audio hardware */
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
393 Mint_InitAudio(this, spec);
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
394
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
395 return(1); /* We don't use threaded audio */
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
396 }
1097
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
397
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
398 static void Mint_GsxbInterrupt(void)
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
399 {
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
400 Uint8 *newbuf;
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
401
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
402 if (SDL_MintAudio_mutex)
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
403 return;
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
404
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
405 SDL_MintAudio_mutex=1;
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
406
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
407 SDL_MintAudio_numbuf ^= 1;
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
408 SDL_MintAudio_Callback();
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
409 newbuf = SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf];
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
410 Setbuffer(0, newbuf, newbuf + SDL_MintAudio_audiosize);
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
411
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
412 SDL_MintAudio_mutex=0;
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
413 }
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
414
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
415 static void Mint_GsxbNullInterrupt(void)
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
416 {
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
417 }