Mercurial > sdl-ios-xcode

annotate src/audio/nas/SDL_nasaudio.c @ 2938:2929ed239d2a

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Adjusted default choice of audio driver. If a driver can definitely see available devices, it is chosen. Otherwise, we'll take the first driver that initializes but saw no devices...this might be because it can't enumerate them, or there really aren't any available. This prevents the dsp driver from hogging control when there are no /dev/dsp* nodes (for example, on a Linux box with ALSA and no OSS emulation).
author Ryan C. Gordon <icculus@icculus.org>
date Thu, 01 Jan 2009 07:54:58 +0000
parents 99210400e8b9
children 1e431c2631ee
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 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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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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142
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diff changeset
143 static int
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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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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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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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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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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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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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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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212
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213 static unsigned char
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214 sdlformat_to_auformat(unsigned int fmt)
0
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215 {
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216 switch (fmt) {
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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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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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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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259 } else {
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260 this2->buf_free = event->num_bytes;
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261 }
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parents: 1402
diff changeset
262 }
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
263 break;
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
264 }
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
265 }
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
266 }
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Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
267 }
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
268 return AuTrue;
0
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parents:
diff changeset
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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diff changeset
274 /* These "Au" things are all macros, not functions... */
1895
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diff changeset
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)) ==
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
278 AuComponentKindPhysicalOutput) &&
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parents: 1402
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
diff changeset
281 }
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
282 }
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
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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parents: 1982
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));
2049
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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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Ryan C. Gordon <icculus@icculus.org>
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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diff changeset
301
1895
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diff changeset
302 /* Try for a closest match on audio 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
303 format = 0;
2049
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
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>
parents: 1402
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>
parents: 1402
diff changeset
309 }
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
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
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
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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parents: 1402
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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parents: 1402
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.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
335 buffer_size = 4096;
0
74212992fb08 Initial revision
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parents:
diff changeset
336
1895
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parents: 1402
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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parents: 1402
diff changeset
342
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
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>
parents: 2049
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
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
349 AuUnlimitedSamples, 0, NULL);
2060
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Sam Lantinga <slouken@libsdl.org>
parents: 2049
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
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
356 NAS_AuStartFlow(this->hidden->aud, this->hidden->flow, NULL);
0
74212992fb08 Initial revision
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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.
Sam Lantinga <slouken@libsdl.org>
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
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
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
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
376 }
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
377
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
378 static int
2060
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Sam Lantinga <slouken@libsdl.org>
parents: 2049
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) {
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
386 SDL_SetError("NAS: AuOpenServer() failed (no audio server?)");
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
387 return 0;
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
388 }
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
389 NAS_AuCloseServer(aud);
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
390 }
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
391
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
392 /* Set the function pointers */
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Ryan C. Gordon <icculus@icculus.org>
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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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
395 impl->WaitDevice = NAS_WaitDevice;
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Ryan C. Gordon <icculus@icculus.org>
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
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
400
2938
2929ed239d2a Adjusted default choice of audio driver.
Ryan C. Gordon <icculus@icculus.org>
parents: 2859
diff changeset
401 return 2; /* 2 == definitely has an audio device. */
2049
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
402 }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
403
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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 };
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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: */