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annotate src/audio/mint/SDL_mintaudio_gsxb.c @ 2044:8d5d119b1640

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Minor cleanup in the mint driver that was sitting on my laptop (sorry!).
author Ryan C. Gordon <icculus@icculus.org>
date Sun, 01 Oct 2006 01:12:08 +0000
parents adf732f1f016
children 5f6550e5184f b19680c84cdf
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
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82 Audio_Available(void)
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83 {
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84 const char *envr = SDL_getenv("SDL_AUDIODRIVER");
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85
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86 /* Check if user asked a different audio driver */
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87 if ((envr) && (SDL_strcmp(envr, MINT_AUDIO_DRIVER_NAME) != 0)) {
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88 DEBUG_PRINT((DEBUG_NAME "user asked a different audio driver\n"));
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89 return (0);
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90 }
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91
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92 /* Cookie _SND present ? if not, assume ST machine */
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93 if (Getcookie(C__SND, &cookie_snd) == C_NOTFOUND) {
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94 cookie_snd = SND_PSG;
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95 }
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96
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97 /* Check if we have 16 bits audio */
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98 if ((cookie_snd & SND_16BIT) == 0) {
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99 DEBUG_PRINT((DEBUG_NAME "no 16 bits sound\n"));
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100 return (0);
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101 }
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102
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103 /* Cookie GSXB present ? */
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104 cookie_gsxb = (Getcookie(C_GSXB, &cookie_gsxb) == C_FOUND);
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106 /* Is it GSXB ? */
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107 if (((cookie_snd & SND_GSXB) == 0) || (cookie_gsxb == 0)) {
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108 DEBUG_PRINT((DEBUG_NAME "no GSXB audio\n"));
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109 return (0);
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110 }
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111
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112 /* Check if audio is lockable */
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113 if (Locksnd() != 1) {
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114 DEBUG_PRINT((DEBUG_NAME "audio locked by other application\n"));
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115 return (0);
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116 }
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117
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118 Unlocksnd();
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119
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120 DEBUG_PRINT((DEBUG_NAME "GSXB audio available!\n"));
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121 return (1);
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122 }
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123
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124 static void
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125 Audio_DeleteDevice(SDL_AudioDevice * device)
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126 {
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127 SDL_free(device->hidden);
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128 SDL_free(device);
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129 }
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130
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131 static SDL_AudioDevice *
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132 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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diff changeset
139 SDL_memset(this, 0, (sizeof *this));
644
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140 this->hidden = (struct SDL_PrivateAudioData *)
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diff changeset
141 SDL_malloc((sizeof *this->hidden));
644
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142 }
1895
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diff changeset
143 if ((this == NULL) || (this->hidden == NULL)) {
644
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diff changeset
144 SDL_OutOfMemory();
1895
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diff changeset
145 if (this) {
1336
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diff changeset
146 SDL_free(this);
644
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147 }
1895
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diff changeset
148 return (0);
644
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parents:
diff changeset
149 }
1336
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
150 SDL_memset(this->hidden, 0, (sizeof *this->hidden));
644
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151
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diff changeset
152 /* Set the function pointers */
1895
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153 this->OpenAudio = Mint_OpenAudio;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
154 this->CloseAudio = Mint_CloseAudio;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
155 this->LockAudio = Mint_LockAudio;
644
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diff changeset
156 this->UnlockAudio = Mint_UnlockAudio;
1895
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Sam Lantinga <slouken@libsdl.org>
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157 this->free = Audio_DeleteDevice;
644
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158
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diff changeset
159 return this;
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parents:
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160 }
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parents:
diff changeset
161
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parents:
diff changeset
162 AudioBootStrap MINTAUDIO_GSXB_bootstrap = {
1895
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diff changeset
163 MINT_AUDIO_DRIVER_NAME, "MiNT GSXB audio driver",
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
164 Audio_Available, Audio_CreateDevice
644
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165 };
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diff changeset
166
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diff changeset
167 static void
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diff changeset
168 Mint_LockAudio(_THIS)
644
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169 {
1895
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diff changeset
170 /* Stop replay */
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diff changeset
171 Buffoper(0);
644
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172 }
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173
1895
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diff changeset
174 static void
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
175 Mint_UnlockAudio(_THIS)
644
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diff changeset
176 {
1895
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diff changeset
177 /* Restart replay */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
178 Buffoper(SB_PLA_ENA | SB_PLA_RPT);
644
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179 }
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diff changeset
180
1895
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diff changeset
181 static void
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
182 Mint_CloseAudio(_THIS)
644
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diff changeset
183 {
1895
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diff changeset
184 /* Stop replay */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
185 Buffoper(0);
644
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diff changeset
186
1895
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diff changeset
187 /* Uninstall interrupt */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
188 if (NSetinterrupt(2, SI_NONE, Mint_GsxbNullInterrupt) < 0) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
189 DEBUG_PRINT((DEBUG_NAME "NSetinterrupt() failed in close\n"));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
190 }
644
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diff changeset
191
1895
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parents: 1412
diff changeset
192 /* Wait if currently playing sound */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
193 while (SDL_MintAudio_mutex != 0) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
194 }
644
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diff changeset
195
1895
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diff changeset
196 /* Clear buffers */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
197 if (SDL_MintAudio_audiobuf[0]) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
198 Mfree(SDL_MintAudio_audiobuf[0]);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
199 SDL_MintAudio_audiobuf[0] = SDL_MintAudio_audiobuf[1] = NULL;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
200 }
644
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parents:
diff changeset
201
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1412
diff changeset
202 /* Unlock sound system */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
203 Unlocksnd();
644
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diff changeset
204 }
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parents:
diff changeset
205
1895
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diff changeset
206 static int
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
207 Mint_CheckAudio(_THIS, SDL_AudioSpec * spec)
644
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parents:
diff changeset
208 {
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1412
diff changeset
209 long snd_format;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
210 int i, resolution, format_signed, format_bigendian;
2005
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
211 SDL_AudioFormat test_format = SDL_FirstAudioFormat(spec->format);
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
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parents: 1895
diff changeset
212 int valid_datatype = 0;
644
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diff changeset
213
2005
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
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diff changeset
214 resolution = SDL_AUDIO_BITSIZE(spec->format);
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
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diff changeset
215 format_signed = SDL_AUDIO_ISSIGNED(spec->format);
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
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parents: 1895
diff changeset
216 format_bigendian = SDL_AUDIO_ISBIGENDIAN(spec->format);
704
c4803992e09c Small bugfixes
Patrice Mandin <patmandin@gmail.com>
parents: 644
diff changeset
217
2005
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
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diff changeset
218 DEBUG_PRINT((DEBUG_NAME "asked: %d bits, ", resolution));
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
219 DEBUG_PRINT(("float=%d, ", SDL_AUDIO_ISFLOAT(spec->format)));
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
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parents: 1895
diff changeset
220 DEBUG_PRINT(("signed=%d, ", format_signed));
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
221 DEBUG_PRINT(("big endian=%d, ", format_bigendian));
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1412
diff changeset
222 DEBUG_PRINT(("channels=%d, ", spec->channels));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
223 DEBUG_PRINT(("freq=%d\n", spec->freq));
644
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parents:
diff changeset
224
2005
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
225 if (spec->channels > 2) {
2043
adf732f1f016 Formatting update
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parents: 2027
diff changeset
226 spec->channels = 2; /* no more than stereo! */
2005
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
227 }
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
228
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
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diff changeset
229 while ((!valid_datatype) && (test_format)) {
2044
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parents: 2043
diff changeset
230 /* Check formats available */
8d5d119b1640 Minor cleanup in the mint driver that was sitting on my laptop (sorry!).
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
231 snd_format = Sndstatus(SND_QUERYFORMATS);
2005
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
232 spec->format = test_format;
2044
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Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
233 resolution = SDL_AUDIO_BITSIZE(spec->format);
8d5d119b1640 Minor cleanup in the mint driver that was sitting on my laptop (sorry!).
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
234 format_signed = SDL_AUDIO_ISSIGNED(spec->format);
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parents: 2043
diff changeset
235 format_bigendian = SDL_AUDIO_ISBIGENDIAN(spec->format);
2005
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
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parents: 1895
diff changeset
236 switch (test_format) {
2044
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Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
237 case AUDIO_U8:
8d5d119b1640 Minor cleanup in the mint driver that was sitting on my laptop (sorry!).
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parents: 2043
diff changeset
238 case AUDIO_S8:
2043
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diff changeset
239 if (snd_format & SND_FORMAT8) {
adf732f1f016 Formatting update
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diff changeset
240 valid_datatype = 1;
adf732f1f016 Formatting update
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diff changeset
241 snd_format = Sndstatus(SND_QUERY8BIT);
2005
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
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diff changeset
242 }
2043
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2027
diff changeset
243 break;
2044
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Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
244
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parents: 2043
diff changeset
245 case AUDIO_U16LSB:
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diff changeset
246 case AUDIO_S16LSB:
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diff changeset
247 case AUDIO_U16MSB:
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diff changeset
248 case AUDIO_S16MSB:
2043
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diff changeset
249 if (snd_format & SND_FORMAT16) {
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
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diff changeset
250 valid_datatype = 1;
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2027
diff changeset
251 snd_format = Sndstatus(SND_QUERY16BIT);
adf732f1f016 Formatting update
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diff changeset
252 }
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
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diff changeset
253 break;
2044
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diff changeset
254
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diff changeset
255 case AUDIO_S32LSB:
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diff changeset
256 case AUDIO_S32MSB:
2043
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diff changeset
257 if (snd_format & SND_FORMAT32) {
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diff changeset
258 valid_datatype = 1;
adf732f1f016 Formatting update
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parents: 2027
diff changeset
259 snd_format = Sndstatus(SND_QUERY32BIT);
adf732f1f016 Formatting update
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parents: 2027
diff changeset
260 }
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2027
diff changeset
261 break;
2044
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Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
262
8d5d119b1640 Minor cleanup in the mint driver that was sitting on my laptop (sorry!).
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
263 /* no float support... */
2005
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
264
2044
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Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
265 default:
8d5d119b1640 Minor cleanup in the mint driver that was sitting on my laptop (sorry!).
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diff changeset
266 test_format = SDL_NextAudioFormat();
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parents: 2043
diff changeset
267 break;
1895
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parents: 1412
diff changeset
268 }
2005
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
269 }
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
270
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
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parents: 1895
diff changeset
271 if (!valid_datatype) {
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
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parents: 1895
diff changeset
272 SDL_SetError("Unsupported audio format");
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
273 return (-1);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
274 }
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
275
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
276 /* Check signed/unsigned format */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
277 if (format_signed) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
278 if (snd_format & SND_FORMATSIGNED) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
279 /* Ok */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
280 } else if (snd_format & SND_FORMATUNSIGNED) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
281 /* Give unsigned format */
2005
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
282 spec->format = spec->format & (~SDL_AUDIO_MASK_SIGNED);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
283 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
284 } else {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
285 if (snd_format & SND_FORMATUNSIGNED) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
286 /* Ok */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
287 } else if (snd_format & SND_FORMATSIGNED) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
288 /* Give signed format */
2005
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
289 spec->format |= SDL_AUDIO_MASK_SIGNED;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
290 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
291 }
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
292
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
293 if (format_bigendian) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
294 if (snd_format & SND_FORMATBIGENDIAN) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
295 /* Ok */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
296 } else if (snd_format & SND_FORMATLITTLEENDIAN) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
297 /* Give little endian format */
2005
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
298 spec->format = spec->format & (~SDL_AUDIO_MASK_ENDIAN);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
299 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
300 } else {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
301 if (snd_format & SND_FORMATLITTLEENDIAN) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
302 /* Ok */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
303 } else if (snd_format & SND_FORMATBIGENDIAN) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
304 /* Give big endian format */
2005
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
305 spec->format |= SDL_AUDIO_MASK_ENDIAN;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
306 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
307 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
308
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
309 /* Calculate and select the closest frequency */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
310 MINTAUDIO_freqcount = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
311 for (i = 1; i < 4; i++) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
312 SDL_MintAudio_AddFrequency(this,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
313 MASTERCLOCK_44K / (MASTERPREDIV_MILAN *
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
314 (1 << i)),
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
315 MASTERCLOCK_44K, (1 << i) - 1, -1);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
316 }
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
317
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
318 #if 1
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
319 for (i = 0; i < MINTAUDIO_freqcount; i++) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
320 DEBUG_PRINT((DEBUG_NAME "freq %d: %lu Hz, clock %lu, prediv %d\n",
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
321 i, MINTAUDIO_frequencies[i].frequency,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
322 MINTAUDIO_frequencies[i].masterclock,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
323 MINTAUDIO_frequencies[i].predivisor));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
324 }
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
325 #endif
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
326
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
327 MINTAUDIO_numfreq = SDL_MintAudio_SearchFrequency(this, spec->freq);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
328 spec->freq = MINTAUDIO_frequencies[MINTAUDIO_numfreq].frequency;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
329
2043
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2027
diff changeset
330 DEBUG_PRINT((DEBUG_NAME "obtained: %d bits, ",
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2027
diff changeset
331 SDL_AUDIO_BITSIZE(spec->format)));
2005
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
332 DEBUG_PRINT(("float=%d, ", SDL_AUDIO_ISFLOAT(spec->format)));
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
333 DEBUG_PRINT(("signed=%d, ", SDL_AUDIO_ISSIGNED(spec->format)));
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
334 DEBUG_PRINT(("big endian=%d, ", SDL_AUDIO_ISBIGENDIAN(spec->format)));
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
335 DEBUG_PRINT(("channels=%d, ", spec->channels));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
336 DEBUG_PRINT(("freq=%d\n", spec->freq));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
337
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
338 return 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
339 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
340
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
341 static void
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
342 Mint_InitAudio(_THIS, SDL_AudioSpec * spec)
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
343 {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
344 int channels_mode, prediv;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
345 void *buffer;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
346
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
347 /* Stop currently playing sound */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
348 Buffoper(0);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
349
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
350 /* Set replay tracks */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
351 Settracks(0, 0);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
352 Setmontracks(0);
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
353
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
354 /* Select replay format */
2005
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
355 switch (SDL_AUDIO_BITSIZE(spec->format)) {
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
356 case 8:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
357 if (spec->channels == 2) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
358 channels_mode = STEREO8;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
359 } else {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
360 channels_mode = MONO8;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
361 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
362 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
363 case 16:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
364 if (spec->channels == 2) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
365 channels_mode = STEREO16;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
366 } else {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
367 channels_mode = MONO16;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
368 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
369 break;
2005
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
370 case 32:
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
371 if (spec->channels == 2) {
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
372 channels_mode = STEREO32;
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
373 } else {
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
374 channels_mode = MONO32;
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
375 }
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
376 break;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
377 default:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
378 channels_mode = STEREO16;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
379 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
380 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
381 if (Setmode(channels_mode) < 0) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
382 DEBUG_PRINT((DEBUG_NAME "Setmode() failed\n"));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
383 }
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
384
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
385 prediv = MINTAUDIO_frequencies[MINTAUDIO_numfreq].predivisor;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
386 Devconnect(DMAPLAY, DAC, CLKEXT, prediv, 1);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
387
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
388 /* Set buffer */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
389 buffer = SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf];
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
390 if (Setbuffer(0, buffer, buffer + spec->size) < 0) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
391 DEBUG_PRINT((DEBUG_NAME "Setbuffer() failed\n"));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
392 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
393
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
394 /* Install interrupt */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
395 if (NSetinterrupt(2, SI_PLAY, Mint_GsxbInterrupt) < 0) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
396 DEBUG_PRINT((DEBUG_NAME "NSetinterrupt() failed\n"));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
397 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
398
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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399 /* Go */
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400 Buffoper(SB_PLA_ENA | SB_PLA_RPT);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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401 DEBUG_PRINT((DEBUG_NAME "hardware initialized\n"));
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402 }
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403
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404 static int
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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405 Mint_OpenAudio(_THIS, SDL_AudioSpec * spec)
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406 {
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407 /* Lock sound system */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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408 if (Locksnd() != 1) {
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409 SDL_SetError("Mint_OpenAudio: Audio system already in use");
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410 return (-1);
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411 }
644
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412
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413 SDL_MintAudio_device = this;
644
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414
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415 /* Check audio capabilities */
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416 if (Mint_CheckAudio(this, spec) == -1) {
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417 return -1;
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418 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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419
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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420 SDL_CalculateAudioSpec(spec);
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421
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422 /* Allocate memory for audio buffers in DMA-able RAM */
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423 DEBUG_PRINT((DEBUG_NAME "buffer size=%d\n", spec->size));
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424
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425 SDL_MintAudio_audiobuf[0] = Atari_SysMalloc(spec->size * 2, MX_STRAM);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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426 if (SDL_MintAudio_audiobuf[0] == NULL) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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427 SDL_SetError("MINT_OpenAudio: Not enough memory for audio buffer");
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428 return (-1);
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429 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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430 SDL_MintAudio_audiobuf[1] = SDL_MintAudio_audiobuf[0] + spec->size;
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431 SDL_MintAudio_numbuf = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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432 SDL_memset(SDL_MintAudio_audiobuf[0], spec->silence, spec->size * 2);
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433 SDL_MintAudio_audiosize = spec->size;
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434 SDL_MintAudio_mutex = 0;
644
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435
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436 DEBUG_PRINT((DEBUG_NAME "buffer 0 at 0x%08x\n",
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1412
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437 SDL_MintAudio_audiobuf[0]));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1412
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438 DEBUG_PRINT((DEBUG_NAME "buffer 1 at 0x%08x\n",
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
439 SDL_MintAudio_audiobuf[1]));
644
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440
2027
d48ead2d2ba5 Save/restore FPU registers in interrupt
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diff changeset
441 SDL_MintAudio_CheckFpu();
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diff changeset
442
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443 /* Setup audio hardware */
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444 Mint_InitAudio(this, spec);
644
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445
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446 return (1); /* We don't use threaded audio */
644
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447 }
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448
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449 static void
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
450 Mint_GsxbInterrupt(void)
644
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diff changeset
451 {
1895
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452 Uint8 *newbuf;
644
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453
1895
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454 if (SDL_MintAudio_mutex)
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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455 return;
644
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diff changeset
456
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457 SDL_MintAudio_mutex = 1;
644
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diff changeset
458
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459 SDL_MintAudio_numbuf ^= 1;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1412
diff changeset
460 SDL_MintAudio_Callback();
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1412
diff changeset
461 newbuf = SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf];
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462 Setbuffer(0, newbuf, newbuf + SDL_MintAudio_audiosize);
644
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parents:
diff changeset
463
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464 SDL_MintAudio_mutex = 0;
644
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diff changeset
465 }
1097
c83fa1c650dd Move GSXB callback to C source
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parents: 962
diff changeset
466
1895
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diff changeset
467 static void
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
468 Mint_GsxbNullInterrupt(void)
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diff changeset
469 {
c83fa1c650dd Move GSXB callback to C source
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diff changeset
470 }
c83fa1c650dd Move GSXB callback to C source
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parents: 962
diff changeset
471
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diff changeset
472 /* vi: set ts=4 sw=4 expandtab: */