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annotate src/audio/nas/SDL_nasaudio.c @ 5267:b530ef003506

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Happy 2011! :)
author Sam Lantinga <slouken@libsdl.org>
date Fri, 11 Feb 2011 22:37:15 -0800
parents 4160ba33b597
children
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2011 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 Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 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 Lesser 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 Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 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 This driver was written by:
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23 Erik Inge Bolsų
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24 knan@mo.himolde.no
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25 */
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26 #include "SDL_config.h"
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27
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28 /* Allow access to a raw mixing buffer */
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29
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30 #include <signal.h>
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31 #include <unistd.h>
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32
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33 #include "SDL_timer.h"
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34 #include "SDL_audio.h"
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35 #include "SDL_loadso.h"
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36 #include "../SDL_audiomem.h"
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37 #include "../SDL_audio_c.h"
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38 #include "SDL_nasaudio.h"
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39
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40 /* The tag name used by nas audio */
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41 #define NAS_DRIVER_NAME "nas"
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42
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43 static struct SDL_PrivateAudioData *this2 = NULL;
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44
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45
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46 static void (*NAS_AuCloseServer) (AuServer *);
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47 static void (*NAS_AuNextEvent) (AuServer *, AuBool, AuEvent *);
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48 static AuBool(*NAS_AuDispatchEvent) (AuServer *, AuEvent *);
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49 static AuFlowID(*NAS_AuCreateFlow) (AuServer *, AuStatus *);
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50 static void (*NAS_AuStartFlow) (AuServer *, AuFlowID, AuStatus *);
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51 static void (*NAS_AuSetElements)
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52 (AuServer *, AuFlowID, AuBool, int, AuElement *, AuStatus *);
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53 static void (*NAS_AuWriteElement)
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54 (AuServer *, AuFlowID, int, AuUint32, AuPointer, AuBool, AuStatus *);
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55 static AuServer *(*NAS_AuOpenServer)
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56 (_AuConst char *, int, _AuConst char *, int, _AuConst char *, char **);
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57 static AuEventHandlerRec *(*NAS_AuRegisterEventHandler)
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58 (AuServer *, AuMask, int, AuID, AuEventHandlerCallback, AuPointer);
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59
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60
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61 #ifdef SDL_AUDIO_DRIVER_NAS_DYNAMIC
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62
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63 static const char *nas_library = SDL_AUDIO_DRIVER_NAS_DYNAMIC;
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64 static void *nas_handle = NULL;
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65
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66 static int
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67 load_nas_sym(const char *fn, void **addr)
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68 {
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69 *addr = SDL_LoadFunction(nas_handle, fn);
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70 if (*addr == NULL) {
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71 return 0;
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72 }
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73 return 1;
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74 }
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75
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76 /* cast funcs to char* first, to please GCC's strict aliasing rules. */
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77 #define SDL_NAS_SYM(x) \
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78 if (!load_nas_sym(#x, (void **) (char *) &NAS_##x)) return -1
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79 #else
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80 #define SDL_NAS_SYM(x) NAS_##x = x
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81 #endif
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82
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83 static int
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84 load_nas_syms(void)
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85 {
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86 SDL_NAS_SYM(AuCloseServer);
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87 SDL_NAS_SYM(AuNextEvent);
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88 SDL_NAS_SYM(AuDispatchEvent);
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89 SDL_NAS_SYM(AuCreateFlow);
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90 SDL_NAS_SYM(AuStartFlow);
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91 SDL_NAS_SYM(AuSetElements);
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92 SDL_NAS_SYM(AuWriteElement);
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93 SDL_NAS_SYM(AuOpenServer);
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94 SDL_NAS_SYM(AuRegisterEventHandler);
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95 return 0;
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96 }
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97
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98 #undef SDL_NAS_SYM
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99
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100 #ifdef SDL_AUDIO_DRIVER_NAS_DYNAMIC
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101
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102 static void
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103 UnloadNASLibrary(void)
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104 {
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105 if (nas_handle != NULL) {
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106 SDL_UnloadObject(nas_handle);
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107 nas_handle = NULL;
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108 }
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109 }
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110
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111 static int
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112 LoadNASLibrary(void)
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113 {
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114 int retval = 0;
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115 if (nas_handle == NULL) {
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116 nas_handle = SDL_LoadObject(nas_library);
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117 if (nas_handle == NULL) {
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118 /* Copy error string so we can use it in a new SDL_SetError(). */
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119 char *origerr = SDL_GetError();
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120 size_t len = SDL_strlen(origerr) + 1;
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121 char *err = (char *) alloca(len);
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122 SDL_strlcpy(err, origerr, len);
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123 retval = -1;
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124 SDL_SetError("NAS: SDL_LoadObject('%s') failed: %s\n",
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125 nas_library, err);
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126 } else {
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127 retval = load_nas_syms();
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128 if (retval < 0) {
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129 UnloadNASLibrary();
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130 }
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131 }
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132 }
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133 return retval;
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134 }
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135
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diff changeset
136 #else
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137
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138 static void
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139 UnloadNASLibrary(void)
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140 {
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141 }
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diff changeset
142
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diff changeset
143 static int
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diff changeset
144 LoadNASLibrary(void)
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145 {
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146 load_nas_syms();
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147 return 0;
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148 }
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149
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diff changeset
150 #endif /* SDL_AUDIO_DRIVER_NAS_DYNAMIC */
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151
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152 /* This function waits until it is possible to write a full sound buffer */
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153 static void
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154 NAS_WaitDevice(_THIS)
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155 {
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156 while (this->hidden->buf_free < this->hidden->mixlen) {
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157 AuEvent ev;
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158 NAS_AuNextEvent(this->hidden->aud, AuTrue, &ev);
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159 NAS_AuDispatchEvent(this->hidden->aud, &ev);
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160 }
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161 }
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162
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163 static void
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164 NAS_PlayDevice(_THIS)
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165 {
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166 while (this->hidden->mixlen > this->hidden->buf_free) {
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diff changeset
167 /*
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diff changeset
168 * We think the buffer is full? Yikes! Ask the server for events,
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169 * in the hope that some of them is LowWater events telling us more
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diff changeset
170 * of the buffer is free now than what we think.
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diff changeset
171 */
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172 AuEvent ev;
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173 NAS_AuNextEvent(this->hidden->aud, AuTrue, &ev);
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174 NAS_AuDispatchEvent(this->hidden->aud, &ev);
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175 }
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176 this->hidden->buf_free -= this->hidden->mixlen;
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177
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178 /* Write the audio data */
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diff changeset
179 NAS_AuWriteElement(this->hidden->aud, this->hidden->flow, 0,
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180 this->hidden->mixlen, this->hidden->mixbuf, AuFalse,
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diff changeset
181 NULL);
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182
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183 this->hidden->written += this->hidden->mixlen;
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184
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185 #ifdef DEBUG_AUDIO
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186 fprintf(stderr, "Wrote %d bytes of audio data\n", this->hidden->mixlen);
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187 #endif
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188 }
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189
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190 static Uint8 *
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191 NAS_GetDeviceBuf(_THIS)
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192 {
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193 return (this->hidden->mixbuf);
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194 }
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diff changeset
195
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196 static void
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197 NAS_CloseDevice(_THIS)
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198 {
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diff changeset
199 if (this->hidden != NULL) {
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200 if (this->hidden->mixbuf != NULL) {
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diff changeset
201 SDL_FreeAudioMem(this->hidden->mixbuf);
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diff changeset
202 this->hidden->mixbuf = NULL;
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diff changeset
203 }
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diff changeset
204 if (this->hidden->aud) {
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diff changeset
205 NAS_AuCloseServer(this->hidden->aud);
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diff changeset
206 this->hidden->aud = 0;
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diff changeset
207 }
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diff changeset
208 SDL_free(this->hidden);
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diff changeset
209 this2 = this->hidden = NULL;
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210 }
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211 }
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diff changeset
212
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213 static unsigned char
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diff changeset
214 sdlformat_to_auformat(unsigned int fmt)
0
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diff changeset
215 {
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216 switch (fmt) {
0
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217 case AUDIO_U8:
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218 return AuFormatLinearUnsigned8;
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219 case AUDIO_S8:
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220 return AuFormatLinearSigned8;
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221 case AUDIO_U16LSB:
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222 return AuFormatLinearUnsigned16LSB;
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diff changeset
223 case AUDIO_U16MSB:
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224 return AuFormatLinearUnsigned16MSB;
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225 case AUDIO_S16LSB:
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226 return AuFormatLinearSigned16LSB;
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227 case AUDIO_S16MSB:
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228 return AuFormatLinearSigned16MSB;
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diff changeset
229 }
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230 return AuNone;
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diff changeset
231 }
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diff changeset
232
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233 static AuBool
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234 event_handler(AuServer * aud, AuEvent * ev, AuEventHandlerRec * hnd)
0
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235 {
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236 switch (ev->type) {
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237 case AuEventTypeElementNotify:
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238 {
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239 AuElementNotifyEvent *event = (AuElementNotifyEvent *) ev;
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240
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241 switch (event->kind) {
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242 case AuElementNotifyKindLowWater:
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243 if (this2->buf_free >= 0) {
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244 this2->really += event->num_bytes;
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245 gettimeofday(&this2->last_tv, 0);
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246 this2->buf_free += event->num_bytes;
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247 } else {
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248 this2->buf_free = event->num_bytes;
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249 }
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diff changeset
250 break;
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diff changeset
251 case AuElementNotifyKindState:
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252 switch (event->cur_state) {
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253 case AuStatePause:
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diff changeset
254 if (event->reason != AuReasonUser) {
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255 if (this2->buf_free >= 0) {
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256 this2->really += event->num_bytes;
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257 gettimeofday(&this2->last_tv, 0);
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258 this2->buf_free += event->num_bytes;
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diff changeset
259 } else {
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260 this2->buf_free = event->num_bytes;
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261 }
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parents: 1402
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262 }
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parents: 1402
diff changeset
263 break;
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parents: 1402
diff changeset
264 }
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parents: 1402
diff changeset
265 }
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parents: 1402
diff changeset
266 }
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parents: 1402
diff changeset
267 }
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diff changeset
268 return AuTrue;
0
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parents:
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269 }
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parents:
diff changeset
270
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parents:
diff changeset
271 static AuDeviceID
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parents:
diff changeset
272 find_device(_THIS, int nch)
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parents:
diff changeset
273 {
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274 /* These "Au" things are all macros, not functions... */
1895
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275 int i;
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diff changeset
276 for (i = 0; i < AuServerNumDevices(this->hidden->aud); i++) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1402
diff changeset
277 if ((AuDeviceKind(AuServerDevice(this->hidden->aud, i)) ==
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parents: 1402
diff changeset
278 AuComponentKindPhysicalOutput) &&
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diff changeset
279 AuDeviceNumTracks(AuServerDevice(this->hidden->aud, i)) == nch) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
280 return AuDeviceIdentifier(AuServerDevice(this->hidden->aud, i));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1402
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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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parents: 1402
diff changeset
282 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
283 return AuNone;
0
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parents:
diff changeset
284 }
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parents:
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285
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286 static int
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parents: 1982
diff changeset
287 NAS_OpenDevice(_THIS, const char *devname, int iscapture)
0
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288 {
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diff changeset
289 AuElement elms[3];
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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290 int buffer_size;
1982
3b4ce57c6215 First shot at new audio data types (int32 and float32).
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diff changeset
291 SDL_AudioFormat test_format, format;
1895
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292
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diff changeset
293 /* Initialize all variables that we clean on shutdown */
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parents: 1982
diff changeset
294 this->hidden = (struct SDL_PrivateAudioData *)
2060
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diff changeset
295 SDL_malloc((sizeof *this->hidden));
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parents: 1982
diff changeset
296 if (this->hidden == NULL) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents: 1982
diff changeset
297 SDL_OutOfMemory();
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parents: 1982
diff changeset
298 return 0;
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
299 }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
300 SDL_memset(this->hidden, 0, (sizeof *this->hidden));
0
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301
1895
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302 /* Try for a closest match on audio format */
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Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
303 format = 0;
2049
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diff changeset
304 for (test_format = SDL_FirstAudioFormat(this->spec.format);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
305 !format && test_format;) {
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
306 format = sdlformat_to_auformat(test_format);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
307 if (format == AuNone) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
308 test_format = SDL_NextAudioFormat();
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
309 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
310 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
311 if (format == 0) {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
312 NAS_CloseDevice(this);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
313 SDL_SetError("NAS: Couldn't find any hardware audio formats");
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
314 return 0;
1895
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diff changeset
315 }
2049
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
316 this->spec.format = test_format;
0
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parents:
diff changeset
317
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
318 this->hidden->aud = NAS_AuOpenServer("", 0, NULL, 0, NULL, NULL);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1402
diff changeset
319 if (this->hidden->aud == 0) {
2049
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
320 NAS_CloseDevice(this);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
321 SDL_SetError("NAS: Couldn't open connection to NAS server");
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
322 return 0;
1895
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diff changeset
323 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
324
2049
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
325 this->hidden->dev = find_device(this, this->spec.channels);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1402
diff changeset
326 if ((this->hidden->dev == AuNone)
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
327 || (!(this->hidden->flow = NAS_AuCreateFlow(this->hidden->aud, 0)))) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
328 NAS_CloseDevice(this);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
329 SDL_SetError("NAS: Couldn't find a fitting device on NAS server");
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
330 return 0;
1895
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diff changeset
331 }
0
74212992fb08 Initial revision
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parents:
diff changeset
332
2049
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
333 buffer_size = this->spec.freq;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
334 if (buffer_size < 4096)
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1402
diff changeset
335 buffer_size = 4096;
0
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parents:
diff changeset
336
1895
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diff changeset
337 if (buffer_size > 32768)
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1402
diff changeset
338 buffer_size = 32768; /* So that the buffer won't get unmanageably big. */
0
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parents:
diff changeset
339
1895
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diff changeset
340 /* Calculate the final parameters for this audio specification */
2049
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
341 SDL_CalculateAudioSpec(&this->spec);
1895
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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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parents: 1402
diff changeset
343 this2 = this->hidden;
0
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parents:
diff changeset
344
2060
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
345 AuMakeElementImportClient(elms, this->spec.freq, format,
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
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diff changeset
346 this->spec.channels, AuTrue, buffer_size,
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
347 buffer_size / 4, 0, NULL);
2049
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
348 AuMakeElementExportDevice(elms + 1, 0, this->hidden->dev, this->spec.freq,
1895
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diff changeset
349 AuUnlimitedSamples, 0, NULL);
2060
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diff changeset
350 NAS_AuSetElements(this->hidden->aud, this->hidden->flow, AuTrue, 2, elms,
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
351 NULL);
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
352 NAS_AuRegisterEventHandler(this->hidden->aud, AuEventHandlerIDMask, 0,
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
353 this->hidden->flow, event_handler,
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
354 (AuPointer) NULL);
0
74212992fb08 Initial revision
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parents:
diff changeset
355
2049
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
356 NAS_AuStartFlow(this->hidden->aud, this->hidden->flow, NULL);
0
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parents:
diff changeset
357
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1402
diff changeset
358 /* Allocate mixing buffer */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
359 this->hidden->mixlen = this->spec.size;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
360 this->hidden->mixbuf = (Uint8 *) SDL_AllocAudioMem(this->hidden->mixlen);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
361 if (this->hidden->mixbuf == NULL) {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
362 NAS_CloseDevice(this);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
363 SDL_OutOfMemory();
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
364 return 0;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
365 }
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
366 SDL_memset(this->hidden->mixbuf, this->spec.silence, this->spec.size);
0
74212992fb08 Initial revision
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parents:
diff changeset
367
1895
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Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
368 /* We're ready to rock and roll. :-) */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
369 return 1;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
370 }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
371
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
372 static void
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
373 NAS_Deinitialize(void)
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
374 {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
375 UnloadNASLibrary();
0
74212992fb08 Initial revision
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parents:
diff changeset
376 }
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1402
diff changeset
377
2049
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
378 static int
2060
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
379 NAS_Init(SDL_AudioDriverImpl * impl)
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
380 {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
381 if (LoadNASLibrary() < 0) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
382 return 0;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
383 } else {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
384 AuServer *aud = NAS_AuOpenServer("", 0, NULL, 0, NULL, NULL);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
385 if (aud == NULL) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
386 SDL_SetError("NAS: AuOpenServer() failed (no audio server?)");
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parents: 1982
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387 return 0;
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parents: 1982
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388 }
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parents: 1982
diff changeset
389 NAS_AuCloseServer(aud);
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parents: 1982
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390 }
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parents: 1982
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391
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parents: 1982
diff changeset
392 /* Set the function pointers */
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parents: 1982
diff changeset
393 impl->OpenDevice = NAS_OpenDevice;
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
394 impl->PlayDevice = NAS_PlayDevice;
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parents: 1982
diff changeset
395 impl->WaitDevice = NAS_WaitDevice;
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parents: 1982
diff changeset
396 impl->GetDeviceBuf = NAS_GetDeviceBuf;
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
397 impl->CloseDevice = NAS_CloseDevice;
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
398 impl->Deinitialize = NAS_Deinitialize;
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
399 impl->OnlyHasDefaultOutputDevice = 1; /* !!! FIXME: is this true? */
2049
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parents: 1982
diff changeset
400
3699
4160ba33b597 Removed test for "driver is valid, but doesn't see any audio devices."
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parents: 3697
diff changeset
401 return 1; /* this audio target is available. */
2049
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
402 }
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
403
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
404 AudioBootStrap NAS_bootstrap = {
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
405 NAS_DRIVER_NAME, "Network Audio System", NAS_Init, 0
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
406 };
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
407
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
408 /* vi: set ts=4 sw=4 expandtab: */