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annotate src/audio/mint/SDL_mintaudio_gsxb.c @ 889:eac8c69b5706

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ate: Fri, 09 Apr 2004 20:07:10 +0200 From: Hibernatus Subject: [SDL] BUG: changing video mode in opengl + windows In WIN_GL_SetupWindow (SDL12/src/video/wincommon/SDL_wingl.c) you call WIN_GL_ResetWindow when SetPixelFormat fails. WIN_GL_ResetWindow cannot properly work in its current state, because there are several things to update once you've created a new window. At least DirectInput doesn't work anymore here (which is somewhat annoying for the player :). I think you can simply remove that function. Many games don't try to recover from that exception, that's why the newest ATI drivers emulate 16 bpp display in 32 bpp mode so the error never occurs (but the games may run much slower). Having SDL_SetVideoMode return NULL would be better than actually setting the video mode and losing focus, directinput and maybe directsound too. It also made my previous drivers crash (when switching from 32 bpp windowed to 16 bpp fullscreen).
author Sam Lantinga <slouken@libsdl.org>
date Sun, 16 May 2004 18:02:48 +0000
parents b8d311d90021
children 185acc07127a
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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b8d311d90021 Updated copyright information for 2004 (Happy New Year!)
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3 Copyright (C) 1997-2004 Sam Lantinga
644
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Library General Public License for more details.
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14
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15 You should have received a copy of the GNU Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22
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23 /*
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24 MiNT audio driver
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25 using XBIOS functions (GSXB compatible driver)
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26
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27 Patrice Mandin
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28 */
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29
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30 #include <stdlib.h>
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31 #include <stdio.h>
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32 #include <string.h>
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33
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34 /* Mint includes */
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35 #include <mint/osbind.h>
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36 #include <mint/falcon.h>
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37 #include <mint/cookie.h>
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38
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39 #include "SDL_endian.h"
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40 #include "SDL_audio.h"
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41 #include "SDL_audio_c.h"
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42 #include "SDL_audiomem.h"
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43 #include "SDL_sysaudio.h"
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44
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45 #include "SDL_atarimxalloc_c.h"
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46
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47 #include "SDL_mintaudio.h"
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48 #include "SDL_mintaudio_gsxb.h"
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49
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50 /*--- Defines ---*/
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51
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52 #define MINT_AUDIO_DRIVER_NAME "mint_gsxb"
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53
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54 /* Debug print info */
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55 #define DEBUG_NAME "audio:gsxb: "
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56 #if 0
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57 #define DEBUG_PRINT(what) \
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58 { \
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59 printf what; \
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60 }
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61 #else
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62 #define DEBUG_PRINT(what)
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63 #endif
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64
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65 /*--- Static variables ---*/
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66
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67 static unsigned long cookie_snd, cookie_gsxb;
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68
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69 /*--- Audio driver functions ---*/
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70
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71 static void Mint_CloseAudio(_THIS);
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72 static int Mint_OpenAudio(_THIS, SDL_AudioSpec *spec);
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73 static void Mint_LockAudio(_THIS);
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74 static void Mint_UnlockAudio(_THIS);
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75
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76 /* To check/init hardware audio */
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77 static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec);
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78 static void Mint_InitAudio(_THIS, SDL_AudioSpec *spec);
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79
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80 /*--- Audio driver bootstrap functions ---*/
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81
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82 static int Audio_Available(void)
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83 {
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84 const char *envr = 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) && (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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105
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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 Audio_DeleteDevice(SDL_AudioDevice *device)
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125 {
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126 free(device->hidden);
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127 free(device);
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128 }
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129
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130 static SDL_AudioDevice *Audio_CreateDevice(int devindex)
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131 {
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132 SDL_AudioDevice *this;
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133
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134 /* Initialize all variables that we clean on shutdown */
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135 this = (SDL_AudioDevice *)malloc(sizeof(SDL_AudioDevice));
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136 if ( this ) {
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137 memset(this, 0, (sizeof *this));
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138 this->hidden = (struct SDL_PrivateAudioData *)
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139 malloc((sizeof *this->hidden));
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140 }
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141 if ( (this == NULL) || (this->hidden == NULL) ) {
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142 SDL_OutOfMemory();
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143 if ( this ) {
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144 free(this);
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145 }
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146 return(0);
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147 }
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148 memset(this->hidden, 0, (sizeof *this->hidden));
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149
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150 /* Set the function pointers */
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diff changeset
151 this->OpenAudio = Mint_OpenAudio;
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diff changeset
152 this->CloseAudio = Mint_CloseAudio;
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diff changeset
153 this->LockAudio = Mint_LockAudio;
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parents:
diff changeset
154 this->UnlockAudio = Mint_UnlockAudio;
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diff changeset
155 this->free = Audio_DeleteDevice;
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156
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157 return this;
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158 }
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diff changeset
159
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diff changeset
160 AudioBootStrap MINTAUDIO_GSXB_bootstrap = {
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diff changeset
161 MINT_AUDIO_DRIVER_NAME, "MiNT GSXB audio driver",
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diff changeset
162 Audio_Available, Audio_CreateDevice
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diff changeset
163 };
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diff changeset
164
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diff changeset
165 static void Mint_LockAudio(_THIS)
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diff changeset
166 {
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parents:
diff changeset
167 /* Stop replay */
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diff changeset
168 Buffoper(0);
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diff changeset
169 }
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diff changeset
170
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diff changeset
171 static void Mint_UnlockAudio(_THIS)
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172 {
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parents:
diff changeset
173 /* Restart replay */
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parents:
diff changeset
174 Buffoper(SB_PLA_ENA|SB_PLA_RPT);
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parents:
diff changeset
175 }
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diff changeset
176
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diff changeset
177 static void Mint_CloseAudio(_THIS)
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178 {
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diff changeset
179 /* Stop replay */
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diff changeset
180 Buffoper(0);
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181
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182 DEBUG_PRINT((DEBUG_NAME "closeaudio: replay stopped\n"));
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183
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parents:
diff changeset
184 /* Uninstall interrupt */
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diff changeset
185 if (NSetinterrupt(2, SI_NONE, SDL_MintAudio_EmptyGsxbInterrupt)<0) {
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diff changeset
186 DEBUG_PRINT((DEBUG_NAME "NSetinterrupt() failed in close\n"));
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187 }
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188
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diff changeset
189 DEBUG_PRINT((DEBUG_NAME "closeaudio: interrupt disabled\n"));
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190
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diff changeset
191 /* Wait if currently playing sound */
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diff changeset
192 while (SDL_MintAudio_mutex != 0) {
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193 }
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diff changeset
194
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195 DEBUG_PRINT((DEBUG_NAME "closeaudio: no more interrupt running\n"));
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196
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diff changeset
197 /* Clear buffers */
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diff changeset
198 if (SDL_MintAudio_audiobuf[0]) {
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diff changeset
199 Mfree(SDL_MintAudio_audiobuf[0]);
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diff changeset
200 SDL_MintAudio_audiobuf[0] = SDL_MintAudio_audiobuf[1] = NULL;
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diff changeset
201 }
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diff changeset
202
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diff changeset
203 DEBUG_PRINT((DEBUG_NAME "closeaudio: buffers freed\n"));
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diff changeset
204
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diff changeset
205 /* Unlock sound system */
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parents:
diff changeset
206 Unlocksnd();
594422ab8f9f Atari MiNT: added more audio drivers
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diff changeset
207 }
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diff changeset
208
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diff changeset
209 static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec)
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210 {
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diff changeset
211 long snd_format;
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diff changeset
212 int i, resolution, format_signed, format_bigendian;
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diff changeset
213
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diff changeset
214 resolution = spec->format & 0x00ff;
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diff changeset
215 format_signed = ((spec->format & 0x8000)!=0);
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diff changeset
216 format_bigendian = ((spec->format & 0x1000)!=0);
704
c4803992e09c Small bugfixes
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parents: 644
diff changeset
217
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diff changeset
218 DEBUG_PRINT((DEBUG_NAME "asked: %d bits, ",spec->format & 0x00ff));
c4803992e09c Small bugfixes
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diff changeset
219 DEBUG_PRINT(("signed=%d, ", ((spec->format & 0x8000)!=0)));
c4803992e09c Small bugfixes
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diff changeset
220 DEBUG_PRINT(("big endian=%d, ", ((spec->format & 0x1000)!=0)));
644
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221 DEBUG_PRINT(("channels=%d, ", spec->channels));
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diff changeset
222 DEBUG_PRINT(("freq=%d\n", spec->freq));
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parents:
diff changeset
223
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parents:
diff changeset
224 /* Check formats available */
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diff changeset
225 snd_format = Sndstatus(SND_QUERYFORMATS);
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parents:
diff changeset
226 switch (resolution) {
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parents:
diff changeset
227 case 8:
594422ab8f9f Atari MiNT: added more audio drivers
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diff changeset
228 if ((snd_format & SND_FORMAT8)==0) {
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parents:
diff changeset
229 SDL_SetError("Mint_CheckAudio: 8 bits samples not supported");
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diff changeset
230 return -1;
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parents:
diff changeset
231 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
232 snd_format = Sndstatus(SND_QUERY8BIT);
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parents:
diff changeset
233 break;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
234 case 16:
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
235 if ((snd_format & SND_FORMAT16)==0) {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
236 SDL_SetError("Mint_CheckAudio: 16 bits samples not supported");
594422ab8f9f Atari MiNT: added more audio drivers
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diff changeset
237 return -1;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
238 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
239 snd_format = Sndstatus(SND_QUERY16BIT);
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parents:
diff changeset
240 break;
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parents:
diff changeset
241 default:
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
242 SDL_SetError("Mint_CheckAudio: Unsupported sample resolution");
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parents:
diff changeset
243 return -1;
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parents:
diff changeset
244 break;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
245 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
246
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
247 /* Check signed/unsigned format */
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parents:
diff changeset
248 if (format_signed) {
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parents:
diff changeset
249 if (snd_format & SND_FORMATSIGNED) {
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parents:
diff changeset
250 /* Ok */
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
251 } else if (snd_format & SND_FORMATUNSIGNED) {
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parents:
diff changeset
252 /* Give unsigned format */
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diff changeset
253 spec->format = spec->format & (~0x8000);
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diff changeset
254 }
594422ab8f9f Atari MiNT: added more audio drivers
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diff changeset
255 } else {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
256 if (snd_format & SND_FORMATUNSIGNED) {
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parents:
diff changeset
257 /* Ok */
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
258 } else if (snd_format & SND_FORMATSIGNED) {
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parents:
diff changeset
259 /* Give signed format */
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diff changeset
260 spec->format |= 0x8000;
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parents:
diff changeset
261 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
262 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
263
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
264 if (format_bigendian) {
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parents:
diff changeset
265 if (snd_format & SND_FORMATBIGENDIAN) {
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parents:
diff changeset
266 /* Ok */
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diff changeset
267 } else if (snd_format & SND_FORMATLITTLEENDIAN) {
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parents:
diff changeset
268 /* Give little endian format */
594422ab8f9f Atari MiNT: added more audio drivers
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diff changeset
269 spec->format = spec->format & (~0x1000);
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parents:
diff changeset
270 }
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diff changeset
271 } else {
704
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diff changeset
272 if (snd_format & SND_FORMATLITTLEENDIAN) {
644
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diff changeset
273 /* Ok */
704
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diff changeset
274 } else if (snd_format & SND_FORMATBIGENDIAN) {
644
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parents:
diff changeset
275 /* Give big endian format */
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diff changeset
276 spec->format |= 0x1000;
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diff changeset
277 }
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parents:
diff changeset
278 }
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parents:
diff changeset
279
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parents:
diff changeset
280 /* Calculate and select the closest frequency */
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parents:
diff changeset
281 MINTAUDIO_sfreq=1;
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diff changeset
282 MINTAUDIO_nfreq=12;
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parents:
diff changeset
283 for (i=MINTAUDIO_sfreq;i<MINTAUDIO_nfreq;i++) {
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parents:
diff changeset
284 MINTAUDIO_hardfreq[i]=MASTERCLOCK_44K/(MASTERPREDIV_MILAN*(i+1));
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parents:
diff changeset
285 DEBUG_PRINT((DEBUG_NAME "calc:freq(%d)=%lu\n", i, MINTAUDIO_hardfreq[i]));
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parents:
diff changeset
286 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
287
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parents:
diff changeset
288 MINTAUDIO_numfreq=SDL_MintAudio_SearchFrequency(this, 1, spec->freq);
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parents:
diff changeset
289 spec->freq=MINTAUDIO_hardfreq[MINTAUDIO_numfreq];
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parents:
diff changeset
290
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parents:
diff changeset
291 DEBUG_PRINT((DEBUG_NAME "obtained: %d bits, ",spec->format & 0x00ff));
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parents:
diff changeset
292 DEBUG_PRINT(("signed=%d, ", ((spec->format & 0x8000)!=0)));
704
c4803992e09c Small bugfixes
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parents: 644
diff changeset
293 DEBUG_PRINT(("big endian=%d, ", ((spec->format & 0x1000)!=0)));
644
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
294 DEBUG_PRINT(("channels=%d, ", spec->channels));
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
295 DEBUG_PRINT(("freq=%d\n", spec->freq));
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
296
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
297 return 0;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
298 }
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299
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300 static void Mint_InitAudio(_THIS, SDL_AudioSpec *spec)
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301 {
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302 int channels_mode;
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303 void *buffer;
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304
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305 /* Stop currently playing sound */
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306 Buffoper(0);
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307
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308 /* Set replay tracks */
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309 Settracks(0,0);
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310 Setmontracks(0);
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311
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312 /* Select replay format */
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313 switch (spec->format & 0xff) {
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314 case 8:
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315 if (spec->channels==2) {
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316 channels_mode=STEREO8;
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317 } else {
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318 channels_mode=MONO8;
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319 }
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320 break;
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321 case 16:
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322 if (spec->channels==2) {
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323 channels_mode=STEREO16;
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324 } else {
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325 channels_mode=MONO16;
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326 }
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327 break;
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328 default:
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329 channels_mode=STEREO16;
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330 break;
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331 }
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332 if (Setmode(channels_mode)<0) {
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333 DEBUG_PRINT((DEBUG_NAME "Setmode() failed\n"));
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334 }
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335
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336 Devconnect(DMAPLAY, DAC, CLKEXT, MINTAUDIO_numfreq, 1);
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337
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338 /* Set buffer */
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339 buffer = SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf];
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340 if (Setbuffer(0, buffer, buffer + spec->size)<0) {
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341 DEBUG_PRINT((DEBUG_NAME "Setbuffer() failed\n"));
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342 }
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343
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344 /* Install interrupt */
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345 if (NSetinterrupt(2, SI_PLAY, SDL_MintAudio_GsxbInterrupt)<0) {
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346 DEBUG_PRINT((DEBUG_NAME "NSetinterrupt() failed\n"));
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347 }
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348
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349 /* Go */
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350 Buffoper(SB_PLA_ENA|SB_PLA_RPT);
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351 DEBUG_PRINT((DEBUG_NAME "hardware initialized\n"));
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352 }
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353
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354 static int Mint_OpenAudio(_THIS, SDL_AudioSpec *spec)
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355 {
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356 /* Lock sound system */
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357 if (Locksnd()!=1) {
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358 SDL_SetError("Mint_OpenAudio: Audio system already in use");
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359 return(-1);
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360 }
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361
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362 SDL_MintAudio_device = this;
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363
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364 /* Check audio capabilities */
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365 if (Mint_CheckAudio(this, spec)==-1) {
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366 return -1;
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367 }
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368
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369 SDL_CalculateAudioSpec(spec);
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370
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371 /* Allocate memory for audio buffers in DMA-able RAM */
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372 DEBUG_PRINT((DEBUG_NAME "buffer size=%d\n", spec->size));
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373
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374 SDL_MintAudio_audiobuf[0] = Atari_SysMalloc(spec->size *2, MX_STRAM);
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375 if (SDL_MintAudio_audiobuf[0]==NULL) {
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376 SDL_SetError("MINT_OpenAudio: Not enough memory for audio buffer");
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377 return (-1);
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378 }
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379 SDL_MintAudio_audiobuf[1] = SDL_MintAudio_audiobuf[0] + spec->size ;
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380 SDL_MintAudio_numbuf=0;
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381 memset(SDL_MintAudio_audiobuf[0], spec->silence, spec->size *2);
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382 SDL_MintAudio_audiosize = spec->size;
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383 SDL_MintAudio_mutex = 0;
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384
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385 DEBUG_PRINT((DEBUG_NAME "buffer 0 at 0x%08x\n", SDL_MintAudio_audiobuf[0]));
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386 DEBUG_PRINT((DEBUG_NAME "buffer 1 at 0x%08x\n", SDL_MintAudio_audiobuf[1]));
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387
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388 /* Setup audio hardware */
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389 Mint_InitAudio(this, spec);
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390
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391 return(1); /* We don't use threaded audio */
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392 }