Mercurial > sdl-ios-xcode

annotate src/audio/mint/SDL_mintaudio_stfa.c @ 3950:9d9e15ab1697 SDL-1.2

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Check if yasm supports a nasm-specific syntax we use (it doesn't in 0.5.0, which is still common in Linux distros, and does in 0.6.0). Disable it if we don't, attempting to fallback to using nasm. Thanks to Mike Frysinger for the patch. Fixes Bugzilla #393.
author Ryan C. Gordon <icculus@icculus.org>
date Mon, 04 Jun 2007 11:06:48 +0000
parents e958a003b69b
children a1b03ba2fcd0
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 (STFA 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_stfa.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_stfa"
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48
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49 /* Debug print info */
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50 #define DEBUG_NAME "audio:stfa: "
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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_mch;
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63 static cookie_stfa_t *cookie_stfa;
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64
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65 static const int freqs[16]={
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66 4995, 6269, 7493, 8192,
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67 9830, 10971, 12538, 14985,
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68 16384, 19819, 21943, 24576,
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69 30720, 32336, 43885, 49152
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70 };
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71
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72 /*--- Audio driver functions ---*/
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73
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74 static void Mint_CloseAudio(_THIS);
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75 static int Mint_OpenAudio(_THIS, SDL_AudioSpec *spec);
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76 static void Mint_LockAudio(_THIS);
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77 static void Mint_UnlockAudio(_THIS);
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78
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79 /* To check/init hardware audio */
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80 static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec);
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81 static void Mint_InitAudio(_THIS, SDL_AudioSpec *spec);
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82
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83 /*--- Audio driver bootstrap functions ---*/
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84
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85 static int Audio_Available(void)
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86 {
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87 const char *envr = SDL_getenv("SDL_AUDIODRIVER");
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88
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89 /* Check if user asked a different audio driver */
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90 if ((envr) && (SDL_strcmp(envr, MINT_AUDIO_DRIVER_NAME)!=0)) {
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91 DEBUG_PRINT((DEBUG_NAME "user asked a different audio driver\n"));
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92 return(0);
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93 }
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94
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95 /* Cookie _MCH present ? if not, assume ST machine */
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96 if (Getcookie(C__MCH, &cookie_mch) == C_NOTFOUND) {
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97 cookie_mch = MCH_ST;
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98 }
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99
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100 /* Cookie _SND present ? if not, assume ST machine */
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101 if (Getcookie(C__SND, &cookie_snd) == C_NOTFOUND) {
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102 cookie_snd = SND_PSG;
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103 }
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104
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105 /* Cookie STFA present ? */
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106 if (Getcookie(C_STFA, (long *) &cookie_stfa) != C_FOUND) {
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107 DEBUG_PRINT((DEBUG_NAME "no STFA audio\n"));
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108 return(0);
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109 }
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110
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111 SDL_MintAudio_stfa = cookie_stfa;
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112
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113 DEBUG_PRINT((DEBUG_NAME "STFA audio available!\n"));
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114 return(1);
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115 }
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116
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117 static void Audio_DeleteDevice(SDL_AudioDevice *device)
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118 {
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119 SDL_free(device->hidden);
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120 SDL_free(device);
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121 }
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122
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123 static SDL_AudioDevice *Audio_CreateDevice(int devindex)
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124 {
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125 SDL_AudioDevice *this;
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126
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127 /* Initialize all variables that we clean on shutdown */
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128 this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice));
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129 if ( this ) {
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130 SDL_memset(this, 0, (sizeof *this));
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131 this->hidden = (struct SDL_PrivateAudioData *)
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132 SDL_malloc((sizeof *this->hidden));
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133 }
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134 if ( (this == NULL) || (this->hidden == NULL) ) {
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135 SDL_OutOfMemory();
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136 if ( this ) {
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137 SDL_free(this);
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138 }
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139 return(0);
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140 }
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141 SDL_memset(this->hidden, 0, (sizeof *this->hidden));
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142
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143 /* Set the function pointers */
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144 this->OpenAudio = Mint_OpenAudio;
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145 this->CloseAudio = Mint_CloseAudio;
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146 this->LockAudio = Mint_LockAudio;
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147 this->UnlockAudio = Mint_UnlockAudio;
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diff changeset
148 this->free = Audio_DeleteDevice;
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149
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diff changeset
150 return this;
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diff changeset
151 }
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152
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153 AudioBootStrap MINTAUDIO_STFA_bootstrap = {
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diff changeset
154 MINT_AUDIO_DRIVER_NAME, "MiNT STFA audio driver",
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diff changeset
155 Audio_Available, Audio_CreateDevice
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diff changeset
156 };
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157
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diff changeset
158 static void Mint_LockAudio(_THIS)
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159 {
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160 void *oldpile;
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161
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diff changeset
162 /* Stop replay */
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163 oldpile=(void *)Super(0);
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4eb8c66ce282 Hum badly edited source
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diff changeset
164 cookie_stfa->sound_enable=STFA_PLAY_DISABLE;
4eb8c66ce282 Hum badly edited source
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diff changeset
165 Super(oldpile);
644
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166 }
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167
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diff changeset
168 static void Mint_UnlockAudio(_THIS)
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169 {
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170 void *oldpile;
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171
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diff changeset
172 /* Restart replay */
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diff changeset
173 oldpile=(void *)Super(0);
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diff changeset
174 cookie_stfa->sound_enable=STFA_PLAY_ENABLE|STFA_PLAY_REPEAT;
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diff changeset
175 Super(oldpile);
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176 }
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177
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178 static void Mint_CloseAudio(_THIS)
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179 {
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180 void *oldpile;
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181
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182 /* Stop replay */
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183 oldpile=(void *)Super(0);
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184 cookie_stfa->sound_enable=STFA_PLAY_DISABLE;
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185 Super(oldpile);
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186
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diff changeset
187 /* Wait if currently playing sound */
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188 while (SDL_MintAudio_mutex != 0) {
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diff changeset
189 }
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190
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191 /* Clear buffers */
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diff changeset
192 if (SDL_MintAudio_audiobuf[0]) {
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diff changeset
193 Mfree(SDL_MintAudio_audiobuf[0]);
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diff changeset
194 SDL_MintAudio_audiobuf[0] = SDL_MintAudio_audiobuf[1] = NULL;
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195 }
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diff changeset
196 }
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197
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diff changeset
198 static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec)
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diff changeset
199 {
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diff changeset
200 int i;
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201
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diff changeset
202 DEBUG_PRINT((DEBUG_NAME "asked: %d bits, ",spec->format & 0x00ff));
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diff changeset
203 DEBUG_PRINT(("signed=%d, ", ((spec->format & 0x8000)!=0)));
704
c4803992e09c Small bugfixes
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diff changeset
204 DEBUG_PRINT(("big endian=%d, ", ((spec->format & 0x1000)!=0)));
644
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diff changeset
205 DEBUG_PRINT(("channels=%d, ", spec->channels));
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diff changeset
206 DEBUG_PRINT(("freq=%d\n", spec->freq));
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diff changeset
207
3851
405a192b68e7 Backport from 1.3: most of the audio drivers can now handle data
Ryan C. Gordon <icculus@icculus.org>
parents: 1412
diff changeset
208 if (spec->channels > 2) {
405a192b68e7 Backport from 1.3: most of the audio drivers can now handle data
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parents: 1412
diff changeset
209 spec->channels = 2; /* no more than stereo! */
405a192b68e7 Backport from 1.3: most of the audio drivers can now handle data
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parents: 1412
diff changeset
210 }
405a192b68e7 Backport from 1.3: most of the audio drivers can now handle data
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
211
644
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diff changeset
212 /* Check formats available */
961
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diff changeset
213 MINTAUDIO_freqcount=0;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
214 for (i=0;i<16;i++) {
1107
856f76a099c7 Can use both clocks of FDI interface on Falcon, plus digital output
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parents: 962
diff changeset
215 SDL_MintAudio_AddFrequency(this, freqs[i], 0, i, -1);
644
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diff changeset
216 }
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parents:
diff changeset
217
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
218 #if 1
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
219 for (i=0; i<MINTAUDIO_freqcount; i++) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
220 DEBUG_PRINT((DEBUG_NAME "freq %d: %lu Hz, clock %lu, prediv %d\n",
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
221 i, MINTAUDIO_frequencies[i].frequency, MINTAUDIO_frequencies[i].masterclock,
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
222 MINTAUDIO_frequencies[i].predivisor
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
223 ));
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
224 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
225 #endif
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
226
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
227 MINTAUDIO_numfreq=SDL_MintAudio_SearchFrequency(this, spec->freq);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
228 spec->freq=MINTAUDIO_frequencies[MINTAUDIO_numfreq].frequency;
644
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diff changeset
229
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diff changeset
230 DEBUG_PRINT((DEBUG_NAME "obtained: %d bits, ",spec->format & 0x00ff));
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diff changeset
231 DEBUG_PRINT(("signed=%d, ", ((spec->format & 0x8000)!=0)));
704
c4803992e09c Small bugfixes
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diff changeset
232 DEBUG_PRINT(("big endian=%d, ", ((spec->format & 0x1000)!=0)));
644
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diff changeset
233 DEBUG_PRINT(("channels=%d, ", spec->channels));
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diff changeset
234 DEBUG_PRINT(("freq=%d\n", spec->freq));
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diff changeset
235
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diff changeset
236 return 0;
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diff changeset
237 }
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diff changeset
238
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diff changeset
239 static void Mint_InitAudio(_THIS, SDL_AudioSpec *spec)
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parents:
diff changeset
240 {
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parents:
diff changeset
241 void *buffer;
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diff changeset
242 void *oldpile;
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diff changeset
243
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diff changeset
244 buffer = SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf];
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diff changeset
245
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diff changeset
246 oldpile=(void *)Super(0);
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diff changeset
247
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diff changeset
248 /* Stop replay */
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diff changeset
249 cookie_stfa->sound_enable=STFA_PLAY_DISABLE;
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diff changeset
250
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diff changeset
251 /* Select replay format */
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diff changeset
252 cookie_stfa->sound_control = MINTAUDIO_frequencies[MINTAUDIO_numfreq].predivisor;
644
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diff changeset
253 if ((spec->format & 0xff)==8) {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
254 cookie_stfa->sound_control |= STFA_FORMAT_8BIT;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
255 } else {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
256 cookie_stfa->sound_control |= STFA_FORMAT_16BIT;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
257 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
258 if (spec->channels==2) {
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parents:
diff changeset
259 cookie_stfa->sound_control |= STFA_FORMAT_STEREO;
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parents:
diff changeset
260 } else {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
261 cookie_stfa->sound_control |= STFA_FORMAT_MONO;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
262 }
704
c4803992e09c Small bugfixes
Patrice Mandin <patmandin@gmail.com>
parents: 644
diff changeset
263 if ((spec->format & 0x8000)!=0) {
644
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
264 cookie_stfa->sound_control |= STFA_FORMAT_SIGNED;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
265 } else {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
266 cookie_stfa->sound_control |= STFA_FORMAT_UNSIGNED;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
267 }
704
c4803992e09c Small bugfixes
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diff changeset
268 if ((spec->format & 0x1000)!=0) {
c4803992e09c Small bugfixes
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parents: 644
diff changeset
269 cookie_stfa->sound_control |= STFA_FORMAT_BIGENDIAN;
c4803992e09c Small bugfixes
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diff changeset
270 } else {
644
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
271 cookie_stfa->sound_control |= STFA_FORMAT_LITENDIAN;
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parents:
diff changeset
272 }
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diff changeset
273
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diff changeset
274 /* Set buffer */
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diff changeset
275 cookie_stfa->sound_start = (unsigned long) buffer;
594422ab8f9f Atari MiNT: added more audio drivers
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diff changeset
276 cookie_stfa->sound_end = (unsigned long) (buffer + spec->size);
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parents:
diff changeset
277
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parents:
diff changeset
278 /* Set interrupt */
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diff changeset
279 cookie_stfa->stfa_it = SDL_MintAudio_StfaInterrupt;
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parents:
diff changeset
280
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
281 /* Restart replay */
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parents:
diff changeset
282 cookie_stfa->sound_enable=STFA_PLAY_ENABLE|STFA_PLAY_REPEAT;
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parents:
diff changeset
283
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parents:
diff changeset
284 Super(oldpile);
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diff changeset
285
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diff changeset
286 DEBUG_PRINT((DEBUG_NAME "hardware initialized\n"));
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diff changeset
287 }
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diff changeset
288
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diff changeset
289 static int Mint_OpenAudio(_THIS, SDL_AudioSpec *spec)
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parents:
diff changeset
290 {
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parents:
diff changeset
291 SDL_MintAudio_device = this;
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parents:
diff changeset
292
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
293 /* Check audio capabilities */
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parents:
diff changeset
294 if (Mint_CheckAudio(this, spec)==-1) {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
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295 return -1;
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296 }
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297
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298 SDL_CalculateAudioSpec(spec);
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299
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300 /* Allocate memory for audio buffers in DMA-able RAM */
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301 DEBUG_PRINT((DEBUG_NAME "buffer size=%d\n", spec->size));
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302
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303 SDL_MintAudio_audiobuf[0] = Atari_SysMalloc(spec->size *2, MX_STRAM);
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304 if (SDL_MintAudio_audiobuf[0]==NULL) {
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305 SDL_SetError("MINT_OpenAudio: Not enough memory for audio buffer");
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306 return (-1);
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307 }
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308 SDL_MintAudio_audiobuf[1] = SDL_MintAudio_audiobuf[0] + spec->size ;
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309 SDL_MintAudio_numbuf=0;
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310 SDL_memset(SDL_MintAudio_audiobuf[0], spec->silence, spec->size *2);
644
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311 SDL_MintAudio_audiosize = spec->size;
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312 SDL_MintAudio_mutex = 0;
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313
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314 DEBUG_PRINT((DEBUG_NAME "buffer 0 at 0x%08x\n", SDL_MintAudio_audiobuf[0]));
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315 DEBUG_PRINT((DEBUG_NAME "buffer 1 at 0x%08x\n", SDL_MintAudio_audiobuf[1]));
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316
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317 SDL_MintAudio_CheckFpu();
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318
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319 /* Setup audio hardware */
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320 Mint_InitAudio(this, spec);
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321
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322 return(1); /* We don't use threaded audio */
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323 }