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annotate src/audio/mint/SDL_mintaudio_gsxb.c @ 3851:405a192b68e7 SDL-1.2

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Backport from 1.3: most of the audio drivers can now handle data conversion at a higher level when they can't open the hardware in the exact format requested.
author Ryan C. Gordon <icculus@icculus.org>
date Fri, 01 Sep 2006 22:50:24 +0000
parents a8181c4040b8
children 5b5e549382b3
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2004 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Library General Public License for more details.
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14
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15 You should have received a copy of the GNU Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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24 /*
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25 MiNT audio driver
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26 using XBIOS functions (GSXB compatible driver)
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27
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28 Patrice Mandin
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29 */
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30
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31 /* Mint includes */
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32 #include <mint/osbind.h>
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33 #include <mint/falcon.h>
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34 #include <mint/cookie.h>
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35
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36 #include "SDL_audio.h"
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37 #include "../SDL_audio_c.h"
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38 #include "../SDL_sysaudio.h"
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39
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40 #include "../../video/ataricommon/SDL_atarimxalloc_c.h"
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41
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42 #include "SDL_mintaudio.h"
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43 #include "SDL_mintaudio_gsxb.h"
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44
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45 /*--- Defines ---*/
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46
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47 #define MINT_AUDIO_DRIVER_NAME "mint_gsxb"
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48
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49 /* Debug print info */
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50 #define DEBUG_NAME "audio:gsxb: "
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51 #if 0
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52 #define DEBUG_PRINT(what) \
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53 { \
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54 printf what; \
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55 }
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56 #else
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57 #define DEBUG_PRINT(what)
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58 #endif
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59
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60 /*--- Static variables ---*/
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61
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62 static unsigned long cookie_snd, cookie_gsxb;
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63
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64 /*--- Audio driver functions ---*/
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65
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66 static void Mint_CloseAudio(_THIS);
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67 static int Mint_OpenAudio(_THIS, SDL_AudioSpec *spec);
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68 static void Mint_LockAudio(_THIS);
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69 static void Mint_UnlockAudio(_THIS);
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70
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71 /* To check/init hardware audio */
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72 static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec);
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73 static void Mint_InitAudio(_THIS, SDL_AudioSpec *spec);
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74
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75 /* GSXB callbacks */
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76 static void Mint_GsxbInterrupt(void);
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77 static void Mint_GsxbNullInterrupt(void);
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78
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79 /*--- Audio driver bootstrap functions ---*/
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80
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81 static int Audio_Available(void)
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82 {
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83 const char *envr = SDL_getenv("SDL_AUDIODRIVER");
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84
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85 /* Check if user asked a different audio driver */
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86 if ((envr) && (SDL_strcmp(envr, MINT_AUDIO_DRIVER_NAME)!=0)) {
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87 DEBUG_PRINT((DEBUG_NAME "user asked a different audio driver\n"));
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88 return(0);
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89 }
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90
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91 /* Cookie _SND present ? if not, assume ST machine */
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92 if (Getcookie(C__SND, &cookie_snd) == C_NOTFOUND) {
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93 cookie_snd = SND_PSG;
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94 }
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95
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96 /* Check if we have 16 bits audio */
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97 if ((cookie_snd & SND_16BIT)==0) {
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98 DEBUG_PRINT((DEBUG_NAME "no 16 bits sound\n"));
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99 return(0);
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100 }
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101
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102 /* Cookie GSXB present ? */
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103 cookie_gsxb = (Getcookie(C_GSXB, &cookie_gsxb) == C_FOUND);
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104
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105 /* Is it GSXB ? */
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106 if (((cookie_snd & SND_GSXB)==0) || (cookie_gsxb==0)) {
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107 DEBUG_PRINT((DEBUG_NAME "no GSXB audio\n"));
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108 return(0);
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109 }
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110
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111 /* Check if audio is lockable */
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112 if (Locksnd()!=1) {
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113 DEBUG_PRINT((DEBUG_NAME "audio locked by other application\n"));
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114 return(0);
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115 }
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116
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117 Unlocksnd();
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118
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119 DEBUG_PRINT((DEBUG_NAME "GSXB audio available!\n"));
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120 return(1);
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121 }
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122
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123 static void Audio_DeleteDevice(SDL_AudioDevice *device)
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124 {
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125 SDL_free(device->hidden);
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126 SDL_free(device);
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127 }
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128
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129 static SDL_AudioDevice *Audio_CreateDevice(int devindex)
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130 {
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131 SDL_AudioDevice *this;
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132
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133 /* Initialize all variables that we clean on shutdown */
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134 this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice));
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135 if ( this ) {
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136 SDL_memset(this, 0, (sizeof *this));
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137 this->hidden = (struct SDL_PrivateAudioData *)
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138 SDL_malloc((sizeof *this->hidden));
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139 }
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140 if ( (this == NULL) || (this->hidden == NULL) ) {
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141 SDL_OutOfMemory();
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142 if ( this ) {
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143 SDL_free(this);
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144 }
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145 return(0);
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146 }
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147 SDL_memset(this->hidden, 0, (sizeof *this->hidden));
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148
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diff changeset
149 /* Set the function pointers */
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diff changeset
150 this->OpenAudio = Mint_OpenAudio;
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151 this->CloseAudio = Mint_CloseAudio;
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152 this->LockAudio = Mint_LockAudio;
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153 this->UnlockAudio = Mint_UnlockAudio;
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154 this->free = Audio_DeleteDevice;
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155
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diff changeset
156 return this;
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diff changeset
157 }
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158
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diff changeset
159 AudioBootStrap MINTAUDIO_GSXB_bootstrap = {
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diff changeset
160 MINT_AUDIO_DRIVER_NAME, "MiNT GSXB audio driver",
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diff changeset
161 Audio_Available, Audio_CreateDevice
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diff changeset
162 };
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163
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diff changeset
164 static void Mint_LockAudio(_THIS)
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165 {
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diff changeset
166 /* Stop replay */
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diff changeset
167 Buffoper(0);
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diff changeset
168 }
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169
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diff changeset
170 static void Mint_UnlockAudio(_THIS)
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171 {
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diff changeset
172 /* Restart replay */
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diff changeset
173 Buffoper(SB_PLA_ENA|SB_PLA_RPT);
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parents:
diff changeset
174 }
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175
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diff changeset
176 static void Mint_CloseAudio(_THIS)
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diff changeset
177 {
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parents:
diff changeset
178 /* Stop replay */
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diff changeset
179 Buffoper(0);
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180
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diff changeset
181 /* Uninstall interrupt */
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c83fa1c650dd Move GSXB callback to C source
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parents: 962
diff changeset
182 if (NSetinterrupt(2, SI_NONE, Mint_GsxbNullInterrupt)<0) {
644
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diff changeset
183 DEBUG_PRINT((DEBUG_NAME "NSetinterrupt() failed in close\n"));
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diff changeset
184 }
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185
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diff changeset
186 /* Wait if currently playing sound */
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187 while (SDL_MintAudio_mutex != 0) {
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diff changeset
188 }
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189
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parents:
diff changeset
190 /* Clear buffers */
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parents:
diff changeset
191 if (SDL_MintAudio_audiobuf[0]) {
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parents:
diff changeset
192 Mfree(SDL_MintAudio_audiobuf[0]);
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parents:
diff changeset
193 SDL_MintAudio_audiobuf[0] = SDL_MintAudio_audiobuf[1] = NULL;
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parents:
diff changeset
194 }
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diff changeset
195
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diff changeset
196 /* Unlock sound system */
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diff changeset
197 Unlocksnd();
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diff changeset
198 }
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199
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diff changeset
200 static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec)
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diff changeset
201 {
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diff changeset
202 long snd_format;
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diff changeset
203 int i, resolution, format_signed, format_bigendian;
3851
405a192b68e7 Backport from 1.3: most of the audio drivers can now handle data
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parents: 1412
diff changeset
204 SDL_AudioFormat test_format = SDL_FirstAudioFormat(spec->format);
405a192b68e7 Backport from 1.3: most of the audio drivers can now handle data
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diff changeset
205 int valid_datatype = 0;
644
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diff changeset
206
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diff changeset
207 resolution = spec->format & 0x00ff;
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diff changeset
208 format_signed = ((spec->format & 0x8000)!=0);
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diff changeset
209 format_bigendian = ((spec->format & 0x1000)!=0);
704
c4803992e09c Small bugfixes
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diff changeset
210
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diff changeset
211 DEBUG_PRINT((DEBUG_NAME "asked: %d bits, ",spec->format & 0x00ff));
c4803992e09c Small bugfixes
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diff changeset
212 DEBUG_PRINT(("signed=%d, ", ((spec->format & 0x8000)!=0)));
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diff changeset
213 DEBUG_PRINT(("big endian=%d, ", ((spec->format & 0x1000)!=0)));
644
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214 DEBUG_PRINT(("channels=%d, ", spec->channels));
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215 DEBUG_PRINT(("freq=%d\n", spec->freq));
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diff changeset
216
3851
405a192b68e7 Backport from 1.3: most of the audio drivers can now handle data
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diff changeset
217 if (spec->channels > 2) {
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diff changeset
218 spec->channels = 2; /* no more than stereo! */
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diff changeset
219 }
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diff changeset
220
405a192b68e7 Backport from 1.3: most of the audio drivers can now handle data
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diff changeset
221 while ((!valid_datatype) && (test_format)) {
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diff changeset
222 /* Check formats available */
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diff changeset
223 snd_format = Sndstatus(SND_QUERYFORMATS);
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diff changeset
224 spec->format = test_format;
405a192b68e7 Backport from 1.3: most of the audio drivers can now handle data
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diff changeset
225 resolution = SDL_AUDIO_BITSIZE(spec->format);
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diff changeset
226 format_signed = SDL_AUDIO_ISSIGNED(spec->format);
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diff changeset
227 format_bigendian = SDL_AUDIO_ISBIGENDIAN(spec->format);
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diff changeset
228 switch (test_format) {
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diff changeset
229 case AUDIO_U8:
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diff changeset
230 case AUDIO_S8:
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diff changeset
231 if (snd_format & SND_FORMAT8) {
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diff changeset
232 valid_datatype = 1;
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diff changeset
233 snd_format = Sndstatus(SND_QUERY8BIT);
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diff changeset
234 }
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parents: 1412
diff changeset
235 break;
405a192b68e7 Backport from 1.3: most of the audio drivers can now handle data
Ryan C. Gordon <icculus@icculus.org>
parents: 1412
diff changeset
236
405a192b68e7 Backport from 1.3: most of the audio drivers can now handle data
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diff changeset
237 case AUDIO_U16LSB:
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diff changeset
238 case AUDIO_S16LSB:
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diff changeset
239 case AUDIO_U16MSB:
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diff changeset
240 case AUDIO_S16MSB:
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diff changeset
241 if (snd_format & SND_FORMAT16) {
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diff changeset
242 valid_datatype = 1;
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diff changeset
243 snd_format = Sndstatus(SND_QUERY16BIT);
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diff changeset
244 }
405a192b68e7 Backport from 1.3: most of the audio drivers can now handle data
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parents: 1412
diff changeset
245 break;
405a192b68e7 Backport from 1.3: most of the audio drivers can now handle data
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parents: 1412
diff changeset
246
405a192b68e7 Backport from 1.3: most of the audio drivers can now handle data
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parents: 1412
diff changeset
247 default:
405a192b68e7 Backport from 1.3: most of the audio drivers can now handle data
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diff changeset
248 test_format = SDL_NextAudioFormat();
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diff changeset
249 break;
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diff changeset
250 }
405a192b68e7 Backport from 1.3: most of the audio drivers can now handle data
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parents: 1412
diff changeset
251 }
405a192b68e7 Backport from 1.3: most of the audio drivers can now handle data
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parents: 1412
diff changeset
252
405a192b68e7 Backport from 1.3: most of the audio drivers can now handle data
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diff changeset
253 if (!valid_datatype) {
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diff changeset
254 SDL_SetError("Unsupported audio format");
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diff changeset
255 return (-1);
405a192b68e7 Backport from 1.3: most of the audio drivers can now handle data
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diff changeset
256 }
644
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parents:
diff changeset
257
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parents:
diff changeset
258 /* Check signed/unsigned format */
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diff changeset
259 if (format_signed) {
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diff changeset
260 if (snd_format & SND_FORMATSIGNED) {
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parents:
diff changeset
261 /* Ok */
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parents:
diff changeset
262 } else if (snd_format & SND_FORMATUNSIGNED) {
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parents:
diff changeset
263 /* Give unsigned format */
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parents:
diff changeset
264 spec->format = spec->format & (~0x8000);
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diff changeset
265 }
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diff changeset
266 } else {
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parents:
diff changeset
267 if (snd_format & SND_FORMATUNSIGNED) {
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parents:
diff changeset
268 /* Ok */
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parents:
diff changeset
269 } else if (snd_format & SND_FORMATSIGNED) {
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parents:
diff changeset
270 /* Give signed format */
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parents:
diff changeset
271 spec->format |= 0x8000;
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parents:
diff changeset
272 }
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parents:
diff changeset
273 }
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parents:
diff changeset
274
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diff changeset
275 if (format_bigendian) {
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parents:
diff changeset
276 if (snd_format & SND_FORMATBIGENDIAN) {
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parents:
diff changeset
277 /* Ok */
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parents:
diff changeset
278 } else if (snd_format & SND_FORMATLITTLEENDIAN) {
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parents:
diff changeset
279 /* Give little endian format */
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parents:
diff changeset
280 spec->format = spec->format & (~0x1000);
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diff changeset
281 }
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parents:
diff changeset
282 } else {
704
c4803992e09c Small bugfixes
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diff changeset
283 if (snd_format & SND_FORMATLITTLEENDIAN) {
644
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parents:
diff changeset
284 /* Ok */
704
c4803992e09c Small bugfixes
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diff changeset
285 } else if (snd_format & SND_FORMATBIGENDIAN) {
644
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parents:
diff changeset
286 /* Give big endian format */
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parents:
diff changeset
287 spec->format |= 0x1000;
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parents:
diff changeset
288 }
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parents:
diff changeset
289 }
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parents:
diff changeset
290
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parents:
diff changeset
291 /* 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
292 MINTAUDIO_freqcount=0;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
293 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
294 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
295 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
296 (1<<i)-1, -1);
644
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
297 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
298
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
299 #if 1
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
300 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
301 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
302 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
303 MINTAUDIO_frequencies[i].predivisor
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
304 ));
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
305 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
306 #endif
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 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
309 spec->freq=MINTAUDIO_frequencies[MINTAUDIO_numfreq].frequency;
644
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parents:
diff changeset
310
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
311 DEBUG_PRINT((DEBUG_NAME "obtained: %d bits, ",spec->format & 0x00ff));
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parents:
diff changeset
312 DEBUG_PRINT(("signed=%d, ", ((spec->format & 0x8000)!=0)));
704
c4803992e09c Small bugfixes
Patrice Mandin <patmandin@gmail.com>
parents: 644
diff changeset
313 DEBUG_PRINT(("big endian=%d, ", ((spec->format & 0x1000)!=0)));
644
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parents:
diff changeset
314 DEBUG_PRINT(("channels=%d, ", spec->channels));
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Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
315 DEBUG_PRINT(("freq=%d\n", spec->freq));
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parents:
diff changeset
316
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parents:
diff changeset
317 return 0;
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parents:
diff changeset
318 }
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parents:
diff changeset
319
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parents:
diff changeset
320 static void Mint_InitAudio(_THIS, SDL_AudioSpec *spec)
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
321 {
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
322 int channels_mode, prediv;
644
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
323 void *buffer;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
324
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
325 /* Stop currently playing sound */
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Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
326 Buffoper(0);
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parents:
diff changeset
327
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Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
328 /* Set replay tracks */
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Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
329 Settracks(0,0);
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parents:
diff changeset
330 Setmontracks(0);
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Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
331
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
332 /* Select replay format */
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
333 switch (spec->format & 0xff) {
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
334 case 8:
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
335 if (spec->channels==2) {
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
336 channels_mode=STEREO8;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
337 } else {
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
338 channels_mode=MONO8;
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
339 }
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
340 break;
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
341 case 16:
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
342 if (spec->channels==2) {
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
343 channels_mode=STEREO16;
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
344 } else {
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
345 channels_mode=MONO16;
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 break;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
348 default:
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
349 channels_mode=STEREO16;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
350 break;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
351 }
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
352 if (Setmode(channels_mode)<0) {
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
353 DEBUG_PRINT((DEBUG_NAME "Setmode() failed\n"));
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
354 }
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
355
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
356 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
357 Devconnect(DMAPLAY, DAC, CLKEXT, prediv, 1);
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
358
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
359 /* Set buffer */
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
360 buffer = SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf];
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
361 if (Setbuffer(0, buffer, buffer + spec->size)<0) {
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
362 DEBUG_PRINT((DEBUG_NAME "Setbuffer() failed\n"));
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
363 }
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 /* Install interrupt */
1097
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
366 if (NSetinterrupt(2, SI_PLAY, Mint_GsxbInterrupt)<0) {
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
367 DEBUG_PRINT((DEBUG_NAME "NSetinterrupt() failed\n"));
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
368 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
369
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
370 /* Go */
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
371 Buffoper(SB_PLA_ENA|SB_PLA_RPT);
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
372 DEBUG_PRINT((DEBUG_NAME "hardware initialized\n"));
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
373 }
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 static int Mint_OpenAudio(_THIS, SDL_AudioSpec *spec)
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
376 {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
377 /* Lock sound system */
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
378 if (Locksnd()!=1) {
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
379 SDL_SetError("Mint_OpenAudio: Audio system already in use");
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
380 return(-1);
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
381 }
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_device = this;
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
384
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
385 /* Check audio capabilities */
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
386 if (Mint_CheckAudio(this, spec)==-1) {
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
387 return -1;
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
388 }
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 SDL_CalculateAudioSpec(spec);
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 /* Allocate memory for audio buffers in DMA-able RAM */
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
393 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
394
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
395 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
396 if (SDL_MintAudio_audiobuf[0]==NULL) {
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
397 SDL_SetError("MINT_OpenAudio: Not enough memory for audio buffer");
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
398 return (-1);
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
399 }
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
400 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
401 SDL_MintAudio_numbuf=0;
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents: 1107
diff changeset
402 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
403 SDL_MintAudio_audiosize = spec->size;
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
404 SDL_MintAudio_mutex = 0;
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
405
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
406 DEBUG_PRINT((DEBUG_NAME "buffer 0 at 0x%08x\n", SDL_MintAudio_audiobuf[0]));
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
407 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
408
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
409 /* Setup audio hardware */
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
410 Mint_InitAudio(this, spec);
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
411
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
412 return(1); /* We don't use threaded audio */
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
413 }
1097
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_GsxbInterrupt(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 Uint8 *newbuf;
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
418
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
419 if (SDL_MintAudio_mutex)
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
420 return;
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
421
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
422 SDL_MintAudio_mutex=1;
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
423
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
424 SDL_MintAudio_numbuf ^= 1;
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
425 SDL_MintAudio_Callback();
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
426 newbuf = SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf];
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
427 Setbuffer(0, newbuf, newbuf + SDL_MintAudio_audiosize);
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
428
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
429 SDL_MintAudio_mutex=0;
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
430 }
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
431
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
432 static void Mint_GsxbNullInterrupt(void)
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
433 {
c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
parents: 962
diff changeset
434 }