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annotate src/audio/mint/SDL_mintaudio_mcsn.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
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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 (MacSound 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_mcsn.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_mcsn"
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53
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54 /* Debug print info */
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55 #define DEBUG_NAME "audio:mcsn: "
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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_mch;
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68 static cookie_mcsn_t *cookie_mcsn;
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69
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70 /*--- Audio driver functions ---*/
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71
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72 static void Mint_CloseAudio(_THIS);
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73 static int Mint_OpenAudio(_THIS, SDL_AudioSpec *spec);
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74 static void Mint_LockAudio(_THIS);
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75 static void Mint_UnlockAudio(_THIS);
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76
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77 /* To check/init hardware audio */
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78 static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec);
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79 static void Mint_InitAudio(_THIS, SDL_AudioSpec *spec);
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80
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81 /*--- Audio driver bootstrap functions ---*/
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82
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83 static int Audio_Available(void)
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84 {
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85 const char *envr = getenv("SDL_AUDIODRIVER");
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86
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87 /* Check if user asked a different audio driver */
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88 if ((envr) && (strcmp(envr, MINT_AUDIO_DRIVER_NAME)!=0)) {
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89 DEBUG_PRINT((DEBUG_NAME "user asked a different audio driver\n"));
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90 return(0);
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91 }
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92
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93 /* Cookie _MCH present ? if not, assume ST machine */
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94 if (Getcookie(C__MCH, &cookie_mch) == C_NOTFOUND) {
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95 cookie_mch = MCH_ST;
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96 }
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97
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98 /* Cookie _SND present ? if not, assume ST machine */
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99 if (Getcookie(C__SND, &cookie_snd) == C_NOTFOUND) {
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100 cookie_snd = SND_PSG;
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101 }
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102
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103 /* Check if we have 16 bits audio */
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104 if ((cookie_snd & SND_16BIT)==0) {
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105 DEBUG_PRINT((DEBUG_NAME "no 16 bits sound\n"));
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106 return(0);
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107 }
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108
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109 /* Cookie MCSN present ? */
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110 if (Getcookie(C_McSn, (long *) &cookie_mcsn) != C_FOUND) {
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111 DEBUG_PRINT((DEBUG_NAME "no MCSN audio\n"));
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112 return(0);
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113 }
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114
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115 /* Check if interrupt at end of replay */
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116 if (cookie_mcsn->pint == 0) {
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117 DEBUG_PRINT((DEBUG_NAME "no interrupt at end of replay\n"));
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118 return(0);
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119 }
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120
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121 /* Check if audio is lockable */
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122 if (Locksnd()!=1) {
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123 DEBUG_PRINT((DEBUG_NAME "audio locked by other application\n"));
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124 return(0);
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125 }
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126
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127 Unlocksnd();
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128
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129 DEBUG_PRINT((DEBUG_NAME "MCSN audio available!\n"));
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130 return(1);
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131 }
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132
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133 static void Audio_DeleteDevice(SDL_AudioDevice *device)
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134 {
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135 free(device->hidden);
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136 free(device);
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137 }
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138
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139 static SDL_AudioDevice *Audio_CreateDevice(int devindex)
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140 {
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141 SDL_AudioDevice *this;
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142
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143 /* Initialize all variables that we clean on shutdown */
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144 this = (SDL_AudioDevice *)malloc(sizeof(SDL_AudioDevice));
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145 if ( this ) {
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146 memset(this, 0, (sizeof *this));
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147 this->hidden = (struct SDL_PrivateAudioData *)
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diff changeset
148 malloc((sizeof *this->hidden));
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parents:
diff changeset
149 }
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parents:
diff changeset
150 if ( (this == NULL) || (this->hidden == NULL) ) {
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parents:
diff changeset
151 SDL_OutOfMemory();
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parents:
diff changeset
152 if ( this ) {
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parents:
diff changeset
153 free(this);
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parents:
diff changeset
154 }
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parents:
diff changeset
155 return(0);
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parents:
diff changeset
156 }
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parents:
diff changeset
157 memset(this->hidden, 0, (sizeof *this->hidden));
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parents:
diff changeset
158
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parents:
diff changeset
159 /* Set the function pointers */
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parents:
diff changeset
160 this->OpenAudio = Mint_OpenAudio;
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parents:
diff changeset
161 this->CloseAudio = Mint_CloseAudio;
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parents:
diff changeset
162 this->LockAudio = Mint_LockAudio;
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parents:
diff changeset
163 this->UnlockAudio = Mint_UnlockAudio;
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parents:
diff changeset
164 this->free = Audio_DeleteDevice;
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parents:
diff changeset
165
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diff changeset
166 return this;
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parents:
diff changeset
167 }
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diff changeset
168
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parents:
diff changeset
169 AudioBootStrap MINTAUDIO_MCSN_bootstrap = {
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diff changeset
170 MINT_AUDIO_DRIVER_NAME, "MiNT MCSN audio driver",
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diff changeset
171 Audio_Available, Audio_CreateDevice
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diff changeset
172 };
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diff changeset
173
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diff changeset
174 static void Mint_LockAudio(_THIS)
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diff changeset
175 {
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diff changeset
176 /* Stop replay */
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diff changeset
177 Buffoper(0);
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diff changeset
178 }
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diff changeset
179
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diff changeset
180 static void Mint_UnlockAudio(_THIS)
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parents:
diff changeset
181 {
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diff changeset
182 /* Restart replay */
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parents:
diff changeset
183 Buffoper(SB_PLA_ENA|SB_PLA_RPT);
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Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
184 }
594422ab8f9f Atari MiNT: added more audio drivers
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diff changeset
185
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
186 static void Mint_CloseAudio(_THIS)
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diff changeset
187 {
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diff changeset
188 /* Stop replay */
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diff changeset
189 Buffoper(0);
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parents:
diff changeset
190
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diff changeset
191 /* Uninstall interrupt */
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diff changeset
192 Jdisint(MFP_DMASOUND);
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diff changeset
193
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diff changeset
194 /* Wait if currently playing sound */
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diff changeset
195 while (SDL_MintAudio_mutex != 0) {
594422ab8f9f Atari MiNT: added more audio drivers
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diff changeset
196 }
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diff changeset
197
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diff changeset
198 /* Clear buffers */
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diff changeset
199 if (SDL_MintAudio_audiobuf[0]) {
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parents:
diff changeset
200 Mfree(SDL_MintAudio_audiobuf[0]);
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diff changeset
201 SDL_MintAudio_audiobuf[0] = SDL_MintAudio_audiobuf[1] = NULL;
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parents:
diff changeset
202 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
203
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diff changeset
204 /* Unlock sound system */
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parents:
diff changeset
205 Unlocksnd();
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parents:
diff changeset
206 }
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diff changeset
207
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diff changeset
208 static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec)
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diff changeset
209 {
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diff changeset
210 int i;
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diff changeset
211 unsigned long masterclock, masterprediv;
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diff changeset
212
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diff changeset
213 DEBUG_PRINT((DEBUG_NAME "asked: %d bits, ",spec->format & 0x00ff));
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diff changeset
214 DEBUG_PRINT(("signed=%d, ", ((spec->format & 0x8000)!=0)));
704
c4803992e09c Small bugfixes
Patrice Mandin <patmandin@gmail.com>
parents: 644
diff changeset
215 DEBUG_PRINT(("big endian=%d, ", ((spec->format & 0x1000)!=0)));
644
594422ab8f9f Atari MiNT: added more audio drivers
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diff changeset
216 DEBUG_PRINT(("channels=%d, ", spec->channels));
594422ab8f9f Atari MiNT: added more audio drivers
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diff changeset
217 DEBUG_PRINT(("freq=%d\n", spec->freq));
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parents:
diff changeset
218
594422ab8f9f Atari MiNT: added more audio drivers
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diff changeset
219 /* Check formats available */
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diff changeset
220 MINTAUDIO_nfreq=4;
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diff changeset
221 MINTAUDIO_sfreq=0;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
222 switch(cookie_mcsn->play) {
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diff changeset
223 case MCSN_ST:
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diff changeset
224 spec->channels=1;
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diff changeset
225 spec->format=8; /* FIXME: is it signed or unsigned ? */
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diff changeset
226 MINTAUDIO_nfreq=1;
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parents:
diff changeset
227 MINTAUDIO_hardfreq[0]=12500;
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parents:
diff changeset
228 break;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
229 case MCSN_TT: /* Also STE, Mega STE */
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diff changeset
230 spec->format=AUDIO_S8;
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parents:
diff changeset
231 masterclock=MASTERCLOCK_STE;
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parents:
diff changeset
232 masterprediv=MASTERPREDIV_STE;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
233 if ((cookie_mch>>16)==MCH_TT) {
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parents:
diff changeset
234 masterclock=MASTERCLOCK_TT;
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parents:
diff changeset
235 masterprediv=MASTERPREDIV_TT;
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parents:
diff changeset
236 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
237 for (i=MINTAUDIO_sfreq;i<MINTAUDIO_nfreq;i++) {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
238 MINTAUDIO_hardfreq[i]=masterclock/(masterprediv*(1<<i));
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
239 DEBUG_PRINT((DEBUG_NAME "calc:freq(%d)=%lu\n", i, MINTAUDIO_hardfreq[i]));
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
240 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
241 break;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
242 case MCSN_FALCON: /* Also Mac */
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parents:
diff changeset
243 MINTAUDIO_nfreq=12;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
244 MINTAUDIO_sfreq=1;
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parents:
diff changeset
245 masterclock=MASTERCLOCK_FALCON1;
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parents:
diff changeset
246 if (cookie_mcsn->res1 != 0) {
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parents:
diff changeset
247 masterclock=cookie_mcsn->res1;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
248 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
249 for (i=MINTAUDIO_sfreq;i<MINTAUDIO_nfreq;i++) {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
250 MINTAUDIO_hardfreq[i]=masterclock/(MASTERPREDIV_FALCON*(i+1));
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
251 DEBUG_PRINT((DEBUG_NAME "calc:freq(%d)=%lu\n", i, MINTAUDIO_hardfreq[i]));
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
252 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
253 spec->format |= 0x8000; /* Audio is always signed */
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parents:
diff changeset
254 if ((spec->format & 0x00ff)==16) {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
255 spec->format |= 0x1000; /* Audio is always big endian */
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parents:
diff changeset
256 spec->channels=2; /* 16 bits always stereo */
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parents:
diff changeset
257 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
258 break;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
259 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
260
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parents:
diff changeset
261 MINTAUDIO_numfreq=SDL_MintAudio_SearchFrequency(this, (cookie_mch>>16)==MCH_F30, spec->freq);
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
262 spec->freq=MINTAUDIO_hardfreq[MINTAUDIO_numfreq];
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parents:
diff changeset
263
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
264 DEBUG_PRINT((DEBUG_NAME "obtained: %d bits, ",spec->format & 0x00ff));
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
265 DEBUG_PRINT(("signed=%d, ", ((spec->format & 0x8000)!=0)));
704
c4803992e09c Small bugfixes
Patrice Mandin <patmandin@gmail.com>
parents: 644
diff changeset
266 DEBUG_PRINT(("big endian=%d, ", ((spec->format & 0x1000)!=0)));
644
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
267 DEBUG_PRINT(("channels=%d, ", spec->channels));
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parents:
diff changeset
268 DEBUG_PRINT(("freq=%d\n", spec->freq));
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parents:
diff changeset
269
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diff changeset
270 return 0;
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parents:
diff changeset
271 }
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parents:
diff changeset
272
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diff changeset
273 static void Mint_InitAudio(_THIS, SDL_AudioSpec *spec)
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parents:
diff changeset
274 {
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parents:
diff changeset
275 int channels_mode;
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parents:
diff changeset
276 void *buffer;
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parents:
diff changeset
277
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diff changeset
278 /* Stop currently playing sound */
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parents:
diff changeset
279 Buffoper(0);
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parents:
diff changeset
280
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parents:
diff changeset
281 /* Set replay tracks */
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parents:
diff changeset
282 Settracks(0,0);
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
283 Setmontracks(0);
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
284
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
285 /* Select replay format */
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
286 channels_mode=STEREO16;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
287 switch (spec->format & 0xff) {
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
288 case 8:
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
289 if (spec->channels==2) {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
290 channels_mode=STEREO8;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
291 } else {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
292 channels_mode=MONO8;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
293 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
294 break;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
295 }
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
296 if (Setmode(channels_mode)<0) {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
297 DEBUG_PRINT((DEBUG_NAME "Setmode() failed\n"));
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298 }
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299
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300 switch(cookie_mcsn->play) {
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301 case MCSN_TT:
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302 Devconnect(DMAPLAY, DAC, CLK25M, CLKOLD, 1);
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303 Soundcmd(SETPRESCALE, 3-MINTAUDIO_numfreq);
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304 DEBUG_PRINT((DEBUG_NAME "STE/TT prescaler selected\n"));
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305 break;
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306 case MCSN_FALCON:
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307 if (cookie_mcsn->res1 != 0) {
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308 Devconnect(DMAPLAY, DAC, CLKEXT, MINTAUDIO_numfreq, 1);
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309 DEBUG_PRINT((DEBUG_NAME "External clock selected, prescaler %d\n", MINTAUDIO_numfreq));
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310 } else {
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311 Devconnect(DMAPLAY, DAC, CLK25M, MINTAUDIO_numfreq, 1);
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312 DEBUG_PRINT((DEBUG_NAME "25.175 MHz clock selected, prescaler %d\n", MINTAUDIO_numfreq));
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313 }
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314 break;
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315 }
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316
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317 /* Set buffer */
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318 buffer = SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf];
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319 if (Setbuffer(0, buffer, buffer + spec->size)<0) {
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320 DEBUG_PRINT((DEBUG_NAME "Setbuffer() failed\n"));
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321 }
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322
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323 /* Install interrupt */
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324 Jdisint(MFP_DMASOUND);
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325 Xbtimer(XB_TIMERA, 8, 1, SDL_MintAudio_XbiosInterrupt);
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326 Jenabint(MFP_DMASOUND);
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327
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328 if (Setinterrupt(SI_TIMERA, SI_PLAY)<0) {
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329 DEBUG_PRINT((DEBUG_NAME "Setinterrupt() failed\n"));
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330 }
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331
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332 /* Go */
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333 Buffoper(SB_PLA_ENA|SB_PLA_RPT);
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334 DEBUG_PRINT((DEBUG_NAME "hardware initialized\n"));
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335 }
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336
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337 static int Mint_OpenAudio(_THIS, SDL_AudioSpec *spec)
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338 {
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339 /* Lock sound system */
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340 if (Locksnd()!=1) {
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341 SDL_SetError("Mint_OpenAudio: Audio system already in use");
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342 return(-1);
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343 }
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344
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345 SDL_MintAudio_device = this;
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346
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347 /* Check audio capabilities */
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348 if (Mint_CheckAudio(this, spec)==-1) {
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349 return -1;
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350 }
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351
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352 SDL_CalculateAudioSpec(spec);
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353
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354 /* Allocate memory for audio buffers in DMA-able RAM */
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355 DEBUG_PRINT((DEBUG_NAME "buffer size=%d\n", spec->size));
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356
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357 SDL_MintAudio_audiobuf[0] = Atari_SysMalloc(spec->size *2, MX_STRAM);
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358 if (SDL_MintAudio_audiobuf[0]==NULL) {
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359 SDL_SetError("MINT_OpenAudio: Not enough memory for audio buffer");
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360 return (-1);
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361 }
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362 SDL_MintAudio_audiobuf[1] = SDL_MintAudio_audiobuf[0] + spec->size ;
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363 SDL_MintAudio_numbuf=0;
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364 memset(SDL_MintAudio_audiobuf[0], spec->silence, spec->size *2);
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365 SDL_MintAudio_audiosize = spec->size;
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366 SDL_MintAudio_mutex = 0;
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367
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368 DEBUG_PRINT((DEBUG_NAME "buffer 0 at 0x%08x\n", SDL_MintAudio_audiobuf[0]));
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369 DEBUG_PRINT((DEBUG_NAME "buffer 1 at 0x%08x\n", SDL_MintAudio_audiobuf[1]));
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370
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371 /* Setup audio hardware */
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372 Mint_InitAudio(this, spec);
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373
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374 return(1); /* We don't use threaded audio */
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375 }