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annotate src/audio/mint/SDL_mintaudio_gsxb.c @ 2060:866052b01ee5

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indent is evil
author Sam Lantinga <slouken@libsdl.org>
date Sat, 28 Oct 2006 16:48:03 +0000
parents 5f6550e5184f
children 29e07f91bc1f
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 static void
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71 MINTGSXB_LockDevice(_THIS)
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72 {
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73 /* Stop replay */
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74 Buffoper(0);
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75 }
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76
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77 static void
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78 MINTGSXB_UnlockDevice(_THIS)
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79 {
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80 /* Restart replay */
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81 Buffoper(SB_PLA_ENA | SB_PLA_RPT);
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82 }
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83
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84 static void
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85 MINTGSXB_CloseDevice(_THIS)
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86 {
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87 if (this->hidden != NULL) {
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88 /* Stop replay */
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89 Buffoper(0);
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90
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91 /* Uninstall interrupt */
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92 if (NSetinterrupt(2, SI_NONE, MINTGSXB_GsxbNullInterrupt) < 0) {
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93 DEBUG_PRINT((DEBUG_NAME "NSetinterrupt() failed in close\n"));
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94 }
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96 /* Wait if currently playing sound */
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97 while (SDL_MintAudio_mutex != 0) {
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98 }
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100 /* Clear buffers */
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101 if (SDL_MintAudio_audiobuf[0]) {
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102 Mfree(SDL_MintAudio_audiobuf[0]);
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103 SDL_MintAudio_audiobuf[0] = SDL_MintAudio_audiobuf[1] = NULL;
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104 }
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105
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106 /* Unlock sound system */
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107 Unlocksnd();
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108
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109 SDL_free(this->hidden);
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110 this->hidden = NULL;
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111 }
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112 }
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113
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114 static int
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115 MINTGSXB_CheckAudio(_THIS)
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116 {
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117 long snd_format;
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118 int i, resolution, format_signed, format_bigendian;
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119 SDL_AudioFormat test_format = SDL_FirstAudioFormat(this->spec.format);
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120 int valid_datatype = 0;
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121
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122 resolution = SDL_AUDIO_BITSIZE(this->spec.format);
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123 format_signed = SDL_AUDIO_ISSIGNED(this->spec.format);
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124 format_bigendian = SDL_AUDIO_ISBIGENDIAN(this->spec.format);
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125
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126 DEBUG_PRINT((DEBUG_NAME "asked: %d bits, ", resolution));
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127 DEBUG_PRINT(("float=%d, ", SDL_AUDIO_ISFLOAT(this->spec.format)));
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128 DEBUG_PRINT(("signed=%d, ", format_signed));
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129 DEBUG_PRINT(("big endian=%d, ", format_bigendian));
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130 DEBUG_PRINT(("channels=%d, ", this->spec.channels));
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131 DEBUG_PRINT(("freq=%d\n", this->spec.freq));
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133 if (this->spec.channels > 2) {
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134 this->spec.channels = 2; /* no more than stereo! */
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135 }
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136
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137 while ((!valid_datatype) && (test_format)) {
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138 /* Check formats available */
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139 snd_format = Sndstatus(SND_QUERYFORMATS);
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140 this->spec.format = test_format;
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141 resolution = SDL_AUDIO_BITSIZE(this->spec.format);
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142 format_signed = SDL_AUDIO_ISSIGNED(this->spec.format);
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143 format_bigendian = SDL_AUDIO_ISBIGENDIAN(this->spec.format);
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144 switch (test_format) {
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145 case AUDIO_U8:
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146 case AUDIO_S8:
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147 if (snd_format & SND_FORMAT8) {
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148 valid_datatype = 1;
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149 snd_format = Sndstatus(SND_QUERY8BIT);
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150 }
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151 break;
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152
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153 case AUDIO_U16LSB:
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154 case AUDIO_S16LSB:
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155 case AUDIO_U16MSB:
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156 case AUDIO_S16MSB:
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157 if (snd_format & SND_FORMAT16) {
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158 valid_datatype = 1;
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159 snd_format = Sndstatus(SND_QUERY16BIT);
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160 }
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161 break;
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162
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163 case AUDIO_S32LSB:
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164 case AUDIO_S32MSB:
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165 if (snd_format & SND_FORMAT32) {
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166 valid_datatype = 1;
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167 snd_format = Sndstatus(SND_QUERY32BIT);
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168 }
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169 break;
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170
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171 /* no float support... */
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172
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173 default:
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174 test_format = SDL_NextAudioFormat();
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175 break;
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176 }
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177 }
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178
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179 if (!valid_datatype) {
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180 SDL_SetError("Unsupported audio format");
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181 return (-1);
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182 }
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183
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184 /* Check signed/unsigned format */
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185 if (format_signed) {
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186 if (snd_format & SND_FORMATSIGNED) {
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187 /* Ok */
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188 } else if (snd_format & SND_FORMATUNSIGNED) {
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189 /* Give unsigned format */
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190 this->spec.format = this->spec.format & (~SDL_AUDIO_MASK_SIGNED);
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191 }
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192 } else {
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193 if (snd_format & SND_FORMATUNSIGNED) {
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194 /* Ok */
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195 } else if (snd_format & SND_FORMATSIGNED) {
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196 /* Give signed format */
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197 this->spec.format |= SDL_AUDIO_MASK_SIGNED;
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198 }
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199 }
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200
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201 if (format_bigendian) {
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202 if (snd_format & SND_FORMATBIGENDIAN) {
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203 /* Ok */
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204 } else if (snd_format & SND_FORMATLITTLEENDIAN) {
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205 /* Give little endian format */
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206 this->spec.format = this->spec.format & (~SDL_AUDIO_MASK_ENDIAN);
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207 }
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208 } else {
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209 if (snd_format & SND_FORMATLITTLEENDIAN) {
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210 /* Ok */
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211 } else if (snd_format & SND_FORMATBIGENDIAN) {
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212 /* Give big endian format */
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213 this->spec.format |= SDL_AUDIO_MASK_ENDIAN;
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214 }
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215 }
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216
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217 /* Calculate and select the closest frequency */
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218 MINTAUDIO_freqcount = 0;
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219 for (i = 1; i < 4; i++) {
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220 SDL_MintAudio_AddFrequency(this,
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221 MASTERCLOCK_44K / (MASTERPREDIV_MILAN *
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222 (1 << i)),
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223 MASTERCLOCK_44K, (1 << i) - 1, -1);
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224 }
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225
961
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226 #if 1
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227 for (i = 0; i < MINTAUDIO_freqcount; i++) {
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228 DEBUG_PRINT((DEBUG_NAME "freq %d: %lu Hz, clock %lu, prediv %d\n",
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229 i, MINTAUDIO_frequencies[i].frequency,
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230 MINTAUDIO_frequencies[i].masterclock,
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231 MINTAUDIO_frequencies[i].predivisor));
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232 }
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233 #endif
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234
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235 MINTAUDIO_numfreq = SDL_MintAudio_SearchFrequency(this, this->spec.freq);
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236 this->spec.freq = MINTAUDIO_frequencies[MINTAUDIO_numfreq].frequency;
1895
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237
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diff changeset
238 DEBUG_PRINT((DEBUG_NAME "obtained: %d bits, ",
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239 SDL_AUDIO_BITSIZE(this->spec.format)));
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240 DEBUG_PRINT(("float=%d, ", SDL_AUDIO_ISFLOAT(this->spec.format)));
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241 DEBUG_PRINT(("signed=%d, ", SDL_AUDIO_ISSIGNED(this->spec.format)));
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242 DEBUG_PRINT(("big endian=%d, ",
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243 SDL_AUDIO_ISBIGENDIAN(this->spec.format)));
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244 DEBUG_PRINT(("channels=%d, ", this->spec.channels));
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245 DEBUG_PRINT(("freq=%d\n", this->spec.freq));
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246
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247 return 0;
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248 }
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249
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250 static void
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251 MINTGSXB_InitAudio(_THIS)
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252 {
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253 int channels_mode, prediv;
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254 void *buffer;
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255
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256 /* Stop currently playing sound */
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257 Buffoper(0);
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258
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259 /* Set replay tracks */
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260 Settracks(0, 0);
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261 Setmontracks(0);
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262
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263 /* Select replay format */
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diff changeset
264 switch (SDL_AUDIO_BITSIZE(this->spec.format)) {
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265 case 8:
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266 if (this->spec.channels == 2) {
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267 channels_mode = STEREO8;
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268 } else {
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269 channels_mode = MONO8;
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270 }
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diff changeset
271 break;
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diff changeset
272 case 16:
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273 if (this->spec.channels == 2) {
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274 channels_mode = STEREO16;
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275 } else {
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276 channels_mode = MONO16;
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277 }
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278 break;
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diff changeset
279 case 32:
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280 if (this->spec.channels == 2) {
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diff changeset
281 channels_mode = STEREO32;
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diff changeset
282 } else {
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diff changeset
283 channels_mode = MONO32;
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diff changeset
284 }
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diff changeset
285 break;
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286 default:
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287 channels_mode = STEREO16;
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288 break;
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289 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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290 if (Setmode(channels_mode) < 0) {
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291 DEBUG_PRINT((DEBUG_NAME "Setmode() failed\n"));
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292 }
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293
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294 prediv = MINTAUDIO_frequencies[MINTAUDIO_numfreq].predivisor;
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295 Devconnect(DMAPLAY, DAC, CLKEXT, prediv, 1);
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296
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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297 /* Set buffer */
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298 buffer = SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf];
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299 if (Setbuffer(0, buffer, buffer + this->spec.size) < 0) {
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300 DEBUG_PRINT((DEBUG_NAME "Setbuffer() failed\n"));
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301 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
302
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
303 /* Install interrupt */
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diff changeset
304 if (NSetinterrupt(2, SI_PLAY, MINTGSXB_GsxbInterrupt) < 0) {
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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305 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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306 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
307
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
308 /* Go */
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diff changeset
309 Buffoper(SB_PLA_ENA | SB_PLA_RPT);
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310 DEBUG_PRINT((DEBUG_NAME "hardware initialized\n"));
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diff changeset
311 }
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diff changeset
312
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313 static int
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diff changeset
314 MINTGSXB_OpenDevice(_THIS, const char *devname, int iscapture)
644
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diff changeset
315 {
1895
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316 /* Lock sound system */
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317 if (Locksnd() != 1) {
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diff changeset
318 SDL_SetError("MINTGSXB_OpenDevice: Audio system already in use");
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319 return 0;
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320 }
644
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321
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322 SDL_MintAudio_device = this;
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323
1895
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324 /* Check audio capabilities */
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325 if (MINTGSXB_CheckAudio(this) == -1) {
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326 return 0;
1895
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327 }
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diff changeset
328
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329 /* Initialize all variables that we clean on shutdown */
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diff changeset
330 this->hidden = (struct SDL_PrivateAudioData *)
2060
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331 SDL_malloc((sizeof *this->hidden));
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332 if (this->hidden == NULL) {
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diff changeset
333 SDL_OutOfMemory();
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diff changeset
334 return 0;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
335 }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
336 SDL_memset(this->hidden, 0, (sizeof *this->hidden));
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
337
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
338 SDL_CalculateAudioSpec(&this->spec);
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339
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340 /* Allocate memory for audio buffers in DMA-able RAM */
2049
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341 DEBUG_PRINT((DEBUG_NAME "buffer size=%d\n", this->spec.size));
644
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diff changeset
342
2060
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diff changeset
343 SDL_MintAudio_audiobuf[0] =
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344 Atari_SysMalloc(this->spec.size * 2, MX_STRAM);
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345 if (SDL_MintAudio_audiobuf[0] == NULL) {
2049
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diff changeset
346 SDL_free(this->hidden);
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diff changeset
347 this->hidden = NULL;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
348 SDL_OutOfMemory();
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
349 return 0;
1895
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350 }
2049
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diff changeset
351 SDL_MintAudio_audiobuf[1] = SDL_MintAudio_audiobuf[0] + this->spec.size;
1895
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352 SDL_MintAudio_numbuf = 0;
2060
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353 SDL_memset(SDL_MintAudio_audiobuf[0], this->spec.silence,
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diff changeset
354 this->spec.size * 2);
2049
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355 SDL_MintAudio_audiosize = this->spec.size;
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356 SDL_MintAudio_mutex = 0;
644
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357
1895
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diff changeset
358 DEBUG_PRINT((DEBUG_NAME "buffer 0 at 0x%08x\n",
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
359 SDL_MintAudio_audiobuf[0]));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
360 DEBUG_PRINT((DEBUG_NAME "buffer 1 at 0x%08x\n",
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
361 SDL_MintAudio_audiobuf[1]));
644
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diff changeset
362
2027
d48ead2d2ba5 Save/restore FPU registers in interrupt
Patrice Mandin <patmandin@gmail.com>
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diff changeset
363 SDL_MintAudio_CheckFpu();
d48ead2d2ba5 Save/restore FPU registers in interrupt
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diff changeset
364
1895
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diff changeset
365 /* Setup audio hardware */
2049
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diff changeset
366 MINTGSXB_InitAudio(this);
644
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diff changeset
367
2060
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diff changeset
368 return 1; /* good to go. */
644
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diff changeset
369 }
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diff changeset
370
1895
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diff changeset
371 static void
2049
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diff changeset
372 MINTGSXB_GsxbInterrupt(void)
644
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diff changeset
373 {
1895
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diff changeset
374 Uint8 *newbuf;
644
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375
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diff changeset
376 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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377 return;
644
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diff changeset
378
1895
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diff changeset
379 SDL_MintAudio_mutex = 1;
644
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diff changeset
380
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381 SDL_MintAudio_numbuf ^= 1;
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
382 SDL_MintAudio_Callback();
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
383 newbuf = SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf];
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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384 Setbuffer(0, newbuf, newbuf + SDL_MintAudio_audiosize);
644
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parents:
diff changeset
385
1895
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386 SDL_MintAudio_mutex = 0;
644
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diff changeset
387 }
1097
c83fa1c650dd Move GSXB callback to C source
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diff changeset
388
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
389 static void
2049
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390 MINTGSXB_GsxbNullInterrupt(void)
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c83fa1c650dd Move GSXB callback to C source
Patrice Mandin <patmandin@gmail.com>
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391 {
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392 }
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393
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394 static int
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866052b01ee5 indent is evil
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395 MINTGSXB_Init(SDL_AudioDriverImpl * impl)
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396 {
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397 /* Cookie _SND present ? if not, assume ST machine */
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398 if (Getcookie(C__SND, &cookie_snd) == C_NOTFOUND) {
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399 cookie_snd = SND_PSG;
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400 }
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401
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402 /* Check if we have 16 bits audio */
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403 if ((cookie_snd & SND_16BIT) == 0) {
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404 SDL_SetError(DEBUG_NAME "no 16-bit sound");
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405 return 0;
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406 }
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407
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408 /* Cookie GSXB present ? */
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409 cookie_gsxb = (Getcookie(C_GSXB, &cookie_gsxb) == C_FOUND);
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410
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411 /* Is it GSXB ? */
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412 if (((cookie_snd & SND_GSXB) == 0) || (cookie_gsxb == 0)) {
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413 SDL_SetError(DEBUG_NAME "no GSXB audio");
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414 return 0;
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415 }
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416
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417 /* Check if audio is lockable */
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418 if (Locksnd() != 1) {
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419 SDL_SetError(DEBUG_NAME "audio locked by other application");
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420 return 0;
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421 }
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422
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423 Unlocksnd();
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424
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425 DEBUG_PRINT((DEBUG_NAME "GSXB audio available!\n"));
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426
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427 /* Set the function pointers */
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428 impl->OpenDevice = MINTGSXB_OpenDevice;
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429 impl->CloseDevice = MINTGSXB_CloseDevice;
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430 impl->LockAudio = MINTGSXB_LockAudio;
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431 impl->UnlockAudio = MINTGSXB_UnlockAudio;
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432 impl->OnlyHasDefaultOutputDevice = 1;
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433 impl->ProvidesOwnCallbackThread = 1;
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434 impl->SkipMixerLock = 1;
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435
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436 return 1;
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437 }
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438
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439 AudioBootStrap MINTAUDIO_GSXB_bootstrap = {
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440 MINT_AUDIO_DRIVER_NAME, "MiNT GSXB audio driver", MINTGSXB_Init, 0
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441 };
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442
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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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443 /* vi: set ts=4 sw=4 expandtab: */