Mercurial > sdl-ios-xcode

annotate src/audio/mint/SDL_mintaudio_gsxb.c @ 3825:76c5a414b996 SDL-ryan-multiple-audio-device

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Dynamic loading for NAS audio driver.
author Ryan C. Gordon <icculus@icculus.org>
date Sat, 07 Oct 2006 07:25:30 +0000
parents 1f156fd874fa
children 66fb40445587
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2004 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Library General Public License for more details.
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14
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15 You should have received a copy of the GNU Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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24 /*
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25 MiNT audio driver
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26 using XBIOS functions (GSXB compatible driver)
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27
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28 Patrice Mandin
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29 */
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30
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31 /* Mint includes */
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32 #include <mint/osbind.h>
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33 #include <mint/falcon.h>
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34 #include <mint/cookie.h>
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35
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36 #include "SDL_audio.h"
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37 #include "../SDL_audio_c.h"
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38 #include "../SDL_sysaudio.h"
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39
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40 #include "../../video/ataricommon/SDL_atarimxalloc_c.h"
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41
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42 #include "SDL_mintaudio.h"
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43 #include "SDL_mintaudio_gsxb.h"
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44
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45 /*--- Defines ---*/
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46
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47 #define MINT_AUDIO_DRIVER_NAME "mint_gsxb"
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48
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49 /* Debug print info */
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50 #define DEBUG_NAME "audio:gsxb: "
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51 #if 0
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52 #define DEBUG_PRINT(what) \
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53 { \
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54 printf what; \
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55 }
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56 #else
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57 #define DEBUG_PRINT(what)
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58 #endif
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59
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60 /*--- Static variables ---*/
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61
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62 static unsigned long cookie_snd, cookie_gsxb;
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63
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64 /*--- Audio driver functions ---*/
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65
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66 /* GSXB callbacks */
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67 static void MINTGSXB_GsxbInterrupt(void);
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68 static void MINTGSXB_GsxbNullInterrupt(void);
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69
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70
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71 static int
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72 MINTGSXB_Available(void)
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73 {
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74 /* Cookie _SND present ? if not, assume ST machine */
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75 if (Getcookie(C__SND, &cookie_snd) == C_NOTFOUND) {
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76 cookie_snd = SND_PSG;
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77 }
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78
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79 /* Check if we have 16 bits audio */
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80 if ((cookie_snd & SND_16BIT) == 0) {
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81 DEBUG_PRINT((DEBUG_NAME "no 16 bits sound\n"));
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82 return (0);
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83 }
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84
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85 /* Cookie GSXB present ? */
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86 cookie_gsxb = (Getcookie(C_GSXB, &cookie_gsxb) == C_FOUND);
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87
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88 /* Is it GSXB ? */
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89 if (((cookie_snd & SND_GSXB) == 0) || (cookie_gsxb == 0)) {
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90 DEBUG_PRINT((DEBUG_NAME "no GSXB audio\n"));
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91 return (0);
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92 }
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93
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94 /* Check if audio is lockable */
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95 if (Locksnd() != 1) {
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96 DEBUG_PRINT((DEBUG_NAME "audio locked by other application\n"));
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97 return (0);
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98 }
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99
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100 Unlocksnd();
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101
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102 DEBUG_PRINT((DEBUG_NAME "GSXB audio available!\n"));
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103 return (1);
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104 }
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105
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106
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107 static void
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108 MINTGSXB_LockDevice(_THIS)
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109 {
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110 /* Stop replay */
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111 Buffoper(0);
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112 }
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113
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114 static void
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115 MINTGSXB_UnlockDevice(_THIS)
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116 {
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117 /* Restart replay */
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118 Buffoper(SB_PLA_ENA | SB_PLA_RPT);
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119 }
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120
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121 static void
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122 MINTGSXB_CloseDevice(_THIS)
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123 {
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124 if (this->hidden != NULL) {
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125 /* Stop replay */
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126 Buffoper(0);
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127
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128 /* Uninstall interrupt */
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129 if (NSetinterrupt(2, SI_NONE, MINTGSXB_GsxbNullInterrupt) < 0) {
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130 DEBUG_PRINT((DEBUG_NAME "NSetinterrupt() failed in close\n"));
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131 }
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132
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133 /* Wait if currently playing sound */
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134 while (SDL_MintAudio_mutex != 0) {}
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135
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136 /* Clear buffers */
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137 if (SDL_MintAudio_audiobuf[0]) {
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138 Mfree(SDL_MintAudio_audiobuf[0]);
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139 SDL_MintAudio_audiobuf[0] = SDL_MintAudio_audiobuf[1] = NULL;
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140 }
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141
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142 /* Unlock sound system */
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143 Unlocksnd();
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144
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145 SDL_free(this->hidden);
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146 this->hidden = NULL;
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147 }
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148 }
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149
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150 static int
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151 MINTGSXB_CheckAudio(_THIS)
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152 {
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153 long snd_format;
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154 int i, resolution, format_signed, format_bigendian;
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155 SDL_AudioFormat test_format = SDL_FirstAudioFormat(this->spec.format);
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156 int valid_datatype = 0;
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157
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158 resolution = SDL_AUDIO_BITSIZE(this->spec.format);
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159 format_signed = SDL_AUDIO_ISSIGNED(this->spec.format);
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160 format_bigendian = SDL_AUDIO_ISBIGENDIAN(this->spec.format);
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161
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162 DEBUG_PRINT((DEBUG_NAME "asked: %d bits, ", resolution));
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163 DEBUG_PRINT(("float=%d, ", SDL_AUDIO_ISFLOAT(this->spec.format)));
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164 DEBUG_PRINT(("signed=%d, ", format_signed));
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165 DEBUG_PRINT(("big endian=%d, ", format_bigendian));
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166 DEBUG_PRINT(("channels=%d, ", this->spec.channels));
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167 DEBUG_PRINT(("freq=%d\n", this->spec.freq));
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168
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169 if (this->spec.channels > 2) {
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170 this->spec.channels = 2; /* no more than stereo! */
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171 }
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172
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173 while ((!valid_datatype) && (test_format)) {
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174 /* Check formats available */
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175 snd_format = Sndstatus(SND_QUERYFORMATS);
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176 this->spec.format = test_format;
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177 resolution = SDL_AUDIO_BITSIZE(this->spec.format);
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178 format_signed = SDL_AUDIO_ISSIGNED(this->spec.format);
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179 format_bigendian = SDL_AUDIO_ISBIGENDIAN(this->spec.format);
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180 switch (test_format) {
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181 case AUDIO_U8:
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182 case AUDIO_S8:
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183 if (snd_format & SND_FORMAT8) {
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184 valid_datatype = 1;
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185 snd_format = Sndstatus(SND_QUERY8BIT);
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186 }
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187 break;
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188
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189 case AUDIO_U16LSB:
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190 case AUDIO_S16LSB:
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191 case AUDIO_U16MSB:
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192 case AUDIO_S16MSB:
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193 if (snd_format & SND_FORMAT16) {
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194 valid_datatype = 1;
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195 snd_format = Sndstatus(SND_QUERY16BIT);
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196 }
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197 break;
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198
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199 case AUDIO_S32LSB:
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200 case AUDIO_S32MSB:
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201 if (snd_format & SND_FORMAT32) {
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202 valid_datatype = 1;
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203 snd_format = Sndstatus(SND_QUERY32BIT);
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204 }
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205 break;
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206
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207 /* no float support... */
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diff changeset
208
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209 default:
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210 test_format = SDL_NextAudioFormat();
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211 break;
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212 }
2005
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213 }
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214
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215 if (!valid_datatype) {
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216 SDL_SetError("Unsupported audio format");
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217 return (-1);
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218 }
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219
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220 /* Check signed/unsigned format */
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221 if (format_signed) {
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222 if (snd_format & SND_FORMATSIGNED) {
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223 /* Ok */
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224 } else if (snd_format & SND_FORMATUNSIGNED) {
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225 /* Give unsigned format */
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226 this->spec.format = this->spec.format & (~SDL_AUDIO_MASK_SIGNED);
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227 }
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228 } else {
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229 if (snd_format & SND_FORMATUNSIGNED) {
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230 /* Ok */
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231 } else if (snd_format & SND_FORMATSIGNED) {
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232 /* Give signed format */
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233 this->spec.format |= SDL_AUDIO_MASK_SIGNED;
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234 }
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235 }
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236
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237 if (format_bigendian) {
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238 if (snd_format & SND_FORMATBIGENDIAN) {
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239 /* Ok */
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240 } else if (snd_format & SND_FORMATLITTLEENDIAN) {
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241 /* Give little endian format */
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242 this->spec.format = this->spec.format & (~SDL_AUDIO_MASK_ENDIAN);
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243 }
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244 } else {
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245 if (snd_format & SND_FORMATLITTLEENDIAN) {
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246 /* Ok */
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247 } else if (snd_format & SND_FORMATBIGENDIAN) {
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248 /* Give big endian format */
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249 this->spec.format |= SDL_AUDIO_MASK_ENDIAN;
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250 }
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251 }
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diff changeset
252
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253 /* Calculate and select the closest frequency */
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254 MINTAUDIO_freqcount = 0;
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255 for (i = 1; i < 4; i++) {
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diff changeset
256 SDL_MintAudio_AddFrequency(this,
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diff changeset
257 MASTERCLOCK_44K / (MASTERPREDIV_MILAN *
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diff changeset
258 (1 << i)),
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diff changeset
259 MASTERCLOCK_44K, (1 << i) - 1, -1);
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diff changeset
260 }
644
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parents:
diff changeset
261
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
262 #if 1
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263 for (i = 0; i < MINTAUDIO_freqcount; i++) {
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264 DEBUG_PRINT((DEBUG_NAME "freq %d: %lu Hz, clock %lu, prediv %d\n",
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diff changeset
265 i, MINTAUDIO_frequencies[i].frequency,
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266 MINTAUDIO_frequencies[i].masterclock,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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267 MINTAUDIO_frequencies[i].predivisor));
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268 }
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diff changeset
269 #endif
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270
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271 MINTAUDIO_numfreq = SDL_MintAudio_SearchFrequency(this, this->spec.freq);
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272 this->spec.freq = MINTAUDIO_frequencies[MINTAUDIO_numfreq].frequency;
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273
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274 DEBUG_PRINT((DEBUG_NAME "obtained: %d bits, ",
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275 SDL_AUDIO_BITSIZE(this->spec.format)));
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276 DEBUG_PRINT(("float=%d, ", SDL_AUDIO_ISFLOAT(this->spec.format)));
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277 DEBUG_PRINT(("signed=%d, ", SDL_AUDIO_ISSIGNED(this->spec.format)));
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278 DEBUG_PRINT(("big endian=%d, ", SDL_AUDIO_ISBIGENDIAN(this->spec.format)));
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279 DEBUG_PRINT(("channels=%d, ", this->spec.channels));
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280 DEBUG_PRINT(("freq=%d\n", this->spec.freq));
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281
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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282 return 0;
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diff changeset
283 }
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diff changeset
284
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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285 static void
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286 MINTGSXB_InitAudio(_THIS)
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287 {
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288 int channels_mode, prediv;
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289 void *buffer;
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290
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diff changeset
291 /* Stop currently playing sound */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
292 Buffoper(0);
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diff changeset
293
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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294 /* Set replay tracks */
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295 Settracks(0, 0);
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296 Setmontracks(0);
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297
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298 /* Select replay format */
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299 switch (SDL_AUDIO_BITSIZE(this->spec.format)) {
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diff changeset
300 case 8:
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301 if (this->spec.channels == 2) {
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302 channels_mode = STEREO8;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
303 } else {
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diff changeset
304 channels_mode = MONO8;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
305 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
306 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
307 case 16:
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diff changeset
308 if (this->spec.channels == 2) {
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diff changeset
309 channels_mode = STEREO16;
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diff changeset
310 } else {
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311 channels_mode = MONO16;
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312 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
313 break;
2005
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
314 case 32:
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diff changeset
315 if (this->spec.channels == 2) {
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diff changeset
316 channels_mode = STEREO32;
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diff changeset
317 } else {
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diff changeset
318 channels_mode = MONO32;
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diff changeset
319 }
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
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diff changeset
320 break;
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c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
321 default:
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322 channels_mode = STEREO16;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
323 break;
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diff changeset
324 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
325 if (Setmode(channels_mode) < 0) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
326 DEBUG_PRINT((DEBUG_NAME "Setmode() failed\n"));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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327 }
644
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diff changeset
328
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329 prediv = MINTAUDIO_frequencies[MINTAUDIO_numfreq].predivisor;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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330 Devconnect(DMAPLAY, DAC, CLKEXT, prediv, 1);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
331
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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332 /* Set buffer */
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diff changeset
333 buffer = SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf];
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diff changeset
334 if (Setbuffer(0, buffer, buffer + this->spec.size) < 0) {
1895
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diff changeset
335 DEBUG_PRINT((DEBUG_NAME "Setbuffer() failed\n"));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
336 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
337
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
338 /* Install interrupt */
3820
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diff changeset
339 if (NSetinterrupt(2, SI_PLAY, MINTGSXB_GsxbInterrupt) < 0) {
1895
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diff changeset
340 DEBUG_PRINT((DEBUG_NAME "NSetinterrupt() failed\n"));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
341 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
342
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
343 /* Go */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
344 Buffoper(SB_PLA_ENA | SB_PLA_RPT);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
345 DEBUG_PRINT((DEBUG_NAME "hardware initialized\n"));
644
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parents:
diff changeset
346 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
347
1895
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diff changeset
348 static int
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349 MINTGSXB_OpenDevice(_THIS, const char *devname, int iscapture)
644
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diff changeset
350 {
1895
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diff changeset
351 /* Lock sound system */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
352 if (Locksnd() != 1) {
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353 SDL_SetError("MINTGSXB_OpenDevice: Audio system already in use");
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diff changeset
354 return 0;
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diff changeset
355 }
644
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parents:
diff changeset
356
1895
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diff changeset
357 SDL_MintAudio_device = this;
644
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parents:
diff changeset
358
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
359 /* Check audio capabilities */
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diff changeset
360 if (MINTGSXB_CheckAudio(this) == -1) {
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diff changeset
361 return 0;
1895
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diff changeset
362 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
363
3820
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diff changeset
364 /* Initialize all variables that we clean on shutdown */
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diff changeset
365 this->hidden = (struct SDL_PrivateAudioData *)
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diff changeset
366 SDL_malloc((sizeof *this->hidden));
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diff changeset
367 if (this->hidden == NULL) {
1f156fd874fa Moved more audio drivers to 1.3 API (all 5 MiNT backends, BSD, IRIX...), and
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parents: 3798
diff changeset
368 SDL_OutOfMemory();
1f156fd874fa Moved more audio drivers to 1.3 API (all 5 MiNT backends, BSD, IRIX...), and
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diff changeset
369 return 0;
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diff changeset
370 }
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diff changeset
371 SDL_memset(this->hidden, 0, (sizeof *this->hidden));
1f156fd874fa Moved more audio drivers to 1.3 API (all 5 MiNT backends, BSD, IRIX...), and
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diff changeset
372
1f156fd874fa Moved more audio drivers to 1.3 API (all 5 MiNT backends, BSD, IRIX...), and
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
373 SDL_CalculateAudioSpec(&this->spec);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
374
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
375 /* Allocate memory for audio buffers in DMA-able RAM */
3820
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Ryan C. Gordon <icculus@icculus.org>
parents: 3798
diff changeset
376 DEBUG_PRINT((DEBUG_NAME "buffer size=%d\n", this->spec.size));
644
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
377
3820
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Ryan C. Gordon <icculus@icculus.org>
parents: 3798
diff changeset
378 SDL_MintAudio_audiobuf[0] = Atari_SysMalloc(this->spec.size * 2, MX_STRAM);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
379 if (SDL_MintAudio_audiobuf[0] == NULL) {
3820
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Ryan C. Gordon <icculus@icculus.org>
parents: 3798
diff changeset
380 SDL_free(this->hidden);
1f156fd874fa Moved more audio drivers to 1.3 API (all 5 MiNT backends, BSD, IRIX...), and
Ryan C. Gordon <icculus@icculus.org>
parents: 3798
diff changeset
381 this->hidden = NULL;
1f156fd874fa Moved more audio drivers to 1.3 API (all 5 MiNT backends, BSD, IRIX...), and
Ryan C. Gordon <icculus@icculus.org>
parents: 3798
diff changeset
382 SDL_OutOfMemory();
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Ryan C. Gordon <icculus@icculus.org>
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383 return 0;
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384 }
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385 SDL_MintAudio_audiobuf[1] = SDL_MintAudio_audiobuf[0] + this->spec.size;
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386 SDL_MintAudio_numbuf = 0;
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387 SDL_memset(SDL_MintAudio_audiobuf[0],this->spec.silence,this->spec.size*2);
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388 SDL_MintAudio_audiosize = this->spec.size;
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389 SDL_MintAudio_mutex = 0;
644
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390
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391 DEBUG_PRINT((DEBUG_NAME "buffer 0 at 0x%08x\n",
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392 SDL_MintAudio_audiobuf[0]));
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393 DEBUG_PRINT((DEBUG_NAME "buffer 1 at 0x%08x\n",
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394 SDL_MintAudio_audiobuf[1]));
644
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395
2027
d48ead2d2ba5 Save/restore FPU registers in interrupt
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396 SDL_MintAudio_CheckFpu();
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397
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398 /* Setup audio hardware */
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399 MINTGSXB_InitAudio(this);
644
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400
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401 return 1; /* good to go. */
644
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402 }
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parents:
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403
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404 static void
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405 MINTGSXB_GsxbInterrupt(void)
644
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406 {
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407 Uint8 *newbuf;
644
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408
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409 if (SDL_MintAudio_mutex)
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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410 return;
644
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411
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412 SDL_MintAudio_mutex = 1;
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413
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414 SDL_MintAudio_numbuf ^= 1;
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415 SDL_MintAudio_Callback();
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416 newbuf = SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf];
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417 Setbuffer(0, newbuf, newbuf + SDL_MintAudio_audiosize);
644
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418
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419 SDL_MintAudio_mutex = 0;
644
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420 }
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diff changeset
421
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422 static void
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423 MINTGSXB_GsxbNullInterrupt(void)
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diff changeset
424 {
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425 }
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diff changeset
426
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427 static int
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428 MINTGSXB_Init(SDL_AudioDriverImpl *impl)
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429 {
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430 /* Set the function pointers */
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431 impl->OpenDevice = MINTGSXB_OpenDevice;
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432 impl->CloseDevice = MINTGSXB_CloseDevice;
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433 impl->LockAudio = MINTGSXB_LockAudio;
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434 impl->UnlockAudio = MINTGSXB_UnlockAudio;
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435 impl->OnlyHasDefaultOutputDevice = 1;
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436 impl->ProvidesOwnCallbackThread = 1;
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437 impl->SkipMixerLock = 1;
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diff changeset
438
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439 return 1;
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diff changeset
440 }
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diff changeset
441
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diff changeset
442 AudioBootStrap MINTAUDIO_GSXB_bootstrap = {
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443 MINT_AUDIO_DRIVER_NAME, "MiNT GSXB audio driver",
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444 MINTGSXB_Available, MINTGSXB_Init, 0
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diff changeset
445 };
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diff changeset
446
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447 /* vi: set ts=4 sw=4 expandtab: */