Mercurial > sdl-ios-xcode
annotate src/audio/bsd/SDL_bsdaudio.c @ 2690:ca01c20274c0 gsoc2008_nds
More work and some bugfixes on the graphics driver.
author | Darren Alton <dalton@stevens.edu> |
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date | Sat, 16 Aug 2008 07:44:35 +0000 |
parents | e27bdcc80744 |
children | 99210400e8b9 |
rev | line source |
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Good idea, renaming OpenBSD audio to BSD audio.
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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 * Driver for native OpenBSD/NetBSD audio(4). |
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26 * vedge@vedge.com.ar. |
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27 */ |
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28 |
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29 #include <errno.h> |
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30 #include <unistd.h> |
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31 #include <fcntl.h> |
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32 #include <sys/time.h> |
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33 #include <sys/ioctl.h> |
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34 #include <sys/stat.h> |
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35 #include <sys/types.h> |
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36 #include <sys/audioio.h> |
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37 |
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38 #include "SDL_timer.h" |
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39 #include "SDL_audio.h" |
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40 #include "../SDL_audiomem.h" |
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41 #include "../SDL_audio_c.h" |
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42 #include "../SDL_audiodev_c.h" |
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43 #include "SDL_bsdaudio.h" |
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44 |
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45 /* The tag name used by NetBSD/OpenBSD audio */ |
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46 #ifdef __NetBSD__ |
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47 #define BSD_AUDIO_DRIVER_NAME "netbsd" |
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48 #define BSD_AUDIO_DRIVER_DESC "Native NetBSD audio" |
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49 #else |
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50 #define BSD_AUDIO_DRIVER_NAME "openbsd" |
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51 #define BSD_AUDIO_DRIVER_DESC "Native OpenBSD audio" |
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52 #endif |
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53 |
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54 /* Open the audio device for playback, and don't block if busy */ |
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55 /* #define USE_BLOCKING_WRITES */ |
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56 |
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57 /* Use timer for synchronization */ |
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58 /* #define USE_TIMER_SYNC */ |
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59 |
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60 /* #define DEBUG_AUDIO */ |
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61 /* #define DEBUG_AUDIO_STREAM */ |
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62 |
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63 #ifdef USE_BLOCKING_WRITES |
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64 #define OPEN_FLAGS_OUTPUT O_WRONLY |
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65 #define OPEN_FLAGS_INPUT O_RDONLY |
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66 #else |
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67 #define OPEN_FLAGS_OUTPUT (O_WRONLY|O_NONBLOCK) |
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68 #define OPEN_FLAGS_INPUT (O_RDONLY|O_NONBLOCK) |
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69 #endif |
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70 |
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71 /* !!! FIXME: so much cut and paste with dsp/dma drivers... */ |
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72 static char **outputDevices = NULL; |
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73 static int outputDeviceCount = 0; |
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74 static char **inputDevices = NULL; |
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75 static int inputDeviceCount = 0; |
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76 |
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77 static inline void |
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78 free_device_list(char ***devs, int *count) |
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79 { |
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80 SDL_FreeUnixAudioDevices(devs, count); |
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81 } |
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82 |
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83 static inline void |
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84 build_device_list(int iscapture, char ***devs, int *count) |
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85 { |
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86 const int flags = ((iscapture) ? OPEN_FLAGS_INPUT : OPEN_FLAGS_OUTPUT); |
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87 free_device_list(devs, count); |
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88 SDL_EnumUnixAudioDevices(flags, 0, NULL, devs, count); |
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89 } |
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90 |
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91 static inline void |
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92 build_device_lists(void) |
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93 { |
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94 build_device_list(0, &outputDevices, &outputDeviceCount); |
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95 build_device_list(1, &inputDevices, &inputDeviceCount); |
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96 } |
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97 |
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98 |
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99 static inline void |
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100 free_device_lists(void) |
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101 { |
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102 free_device_list(&outputDevices, &outputDeviceCount); |
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103 free_device_list(&inputDevices, &inputDeviceCount); |
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104 } |
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105 |
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106 |
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107 static void |
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108 BSDAUDIO_Deinitialize(void) |
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109 { |
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110 free_device_lists(); |
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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 BSDAUDIO_DetectDevices(int iscapture) |
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116 { |
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117 if (iscapture) { |
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118 build_device_list(1, &inputDevices, &inputDeviceCount); |
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119 return inputDeviceCount; |
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120 } else { |
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121 build_device_list(0, &outputDevices, &outputDeviceCount); |
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122 return outputDeviceCount; |
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123 } |
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124 |
2060 | 125 return 0; /* shouldn't ever hit this. */ |
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126 } |
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127 |
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128 static const char * |
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129 BSDAUDIO_GetDeviceName(int index, int iscapture) |
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130 { |
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131 if ((iscapture) && (index < inputDeviceCount)) { |
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132 return inputDevices[index]; |
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133 } else if ((!iscapture) && (index < outputDeviceCount)) { |
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134 return outputDevices[index]; |
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135 } |
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136 |
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137 SDL_SetError("No such device"); |
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138 return NULL; |
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139 } |
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140 |
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141 |
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142 static void |
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143 BSDAUDIO_Status(_THIS) |
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144 { |
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145 #ifdef DEBUG_AUDIO |
2065 | 146 /* *INDENT-OFF* */ |
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147 audio_info_t info; |
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148 |
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149 if (ioctl(this->hidden->audio_fd, AUDIO_GETINFO, &info) < 0) { |
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150 fprintf(stderr, "AUDIO_GETINFO failed.\n"); |
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151 return; |
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152 } |
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153 fprintf(stderr, "\n" |
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154 "[play/record info]\n" |
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155 "buffer size : %d bytes\n" |
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156 "sample rate : %i Hz\n" |
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157 "channels : %i\n" |
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158 "precision : %i-bit\n" |
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159 "encoding : 0x%x\n" |
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160 "seek : %i\n" |
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161 "sample count : %i\n" |
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162 "EOF count : %i\n" |
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163 "paused : %s\n" |
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164 "error occured : %s\n" |
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165 "waiting : %s\n" |
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166 "active : %s\n" |
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167 "", |
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168 info.play.buffer_size, |
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169 info.play.sample_rate, |
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170 info.play.channels, |
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171 info.play.precision, |
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172 info.play.encoding, |
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173 info.play.seek, |
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174 info.play.samples, |
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175 info.play.eof, |
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176 info.play.pause ? "yes" : "no", |
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177 info.play.error ? "yes" : "no", |
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178 info.play.waiting ? "yes" : "no", |
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179 info.play.active ? "yes" : "no"); |
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180 |
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181 fprintf(stderr, "\n" |
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182 "[audio info]\n" |
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183 "monitor_gain : %i\n" |
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184 "hw block size : %d bytes\n" |
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185 "hi watermark : %i\n" |
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186 "lo watermark : %i\n" |
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187 "audio mode : %s\n" |
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188 "", |
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189 info.monitor_gain, |
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190 info.blocksize, |
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191 info.hiwat, info.lowat, |
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192 (info.mode == AUMODE_PLAY) ? "PLAY" |
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193 : (info.mode = AUMODE_RECORD) ? "RECORD" |
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194 : (info.mode == AUMODE_PLAY_ALL ? "PLAY_ALL" : "?")); |
2060 | 195 /* *INDENT-ON* */ |
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196 #endif /* DEBUG_AUDIO */ |
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197 } |
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198 |
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199 |
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200 /* This function waits until it is possible to write a full sound buffer */ |
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201 static void |
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202 BSDAUDIO_WaitDevice(_THIS) |
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203 { |
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204 #ifndef USE_BLOCKING_WRITES /* Not necessary when using blocking writes */ |
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205 /* See if we need to use timed audio synchronization */ |
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206 if (this->hidden->frame_ticks) { |
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207 /* Use timer for general audio synchronization */ |
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208 Sint32 ticks; |
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209 |
2060 | 210 ticks = |
211 ((Sint32) (this->hidden->next_frame - SDL_GetTicks())) - | |
212 FUDGE_TICKS; | |
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213 if (ticks > 0) { |
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214 SDL_Delay(ticks); |
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215 } |
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216 } else { |
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217 /* Use select() for audio synchronization */ |
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218 fd_set fdset; |
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219 struct timeval timeout; |
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220 |
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221 FD_ZERO(&fdset); |
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222 FD_SET(this->hidden->audio_fd, &fdset); |
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223 timeout.tv_sec = 10; |
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224 timeout.tv_usec = 0; |
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225 #ifdef DEBUG_AUDIO |
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226 fprintf(stderr, "Waiting for audio to get ready\n"); |
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227 #endif |
2060 | 228 if (select(this->hidden->audio_fd + 1, NULL, &fdset, NULL, &timeout) |
229 <= 0) { | |
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230 const char *message = |
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231 "Audio timeout - buggy audio driver? (disabled)"; |
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232 /* In general we should never print to the screen, |
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233 but in this case we have no other way of letting |
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234 the user know what happened. |
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235 */ |
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236 fprintf(stderr, "SDL: %s\n", message); |
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237 this->enabled = 0; |
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238 /* Don't try to close - may hang */ |
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239 this->hidden->audio_fd = -1; |
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240 #ifdef DEBUG_AUDIO |
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241 fprintf(stderr, "Done disabling audio\n"); |
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242 #endif |
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243 } |
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244 #ifdef DEBUG_AUDIO |
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245 fprintf(stderr, "Ready!\n"); |
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246 #endif |
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247 } |
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248 #endif /* !USE_BLOCKING_WRITES */ |
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249 } |
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250 |
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251 static void |
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252 BSDAUDIO_PlayDevice(_THIS) |
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253 { |
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254 int written, p = 0; |
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255 |
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256 /* Write the audio data, checking for EAGAIN on broken audio drivers */ |
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257 do { |
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258 written = write(this->hidden->audio_fd, |
2060 | 259 &this->hidden->mixbuf[p], this->hidden->mixlen - p); |
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260 |
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261 if (written > 0) |
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262 p += written; |
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263 if (written == -1 && errno != 0 && errno != EAGAIN && errno != EINTR) { |
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264 /* Non recoverable error has occurred. It should be reported!!! */ |
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265 perror("audio"); |
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266 break; |
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267 } |
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268 |
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269 if (p < written |
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270 || ((written < 0) && ((errno == 0) || (errno == EAGAIN)))) { |
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271 SDL_Delay(1); /* Let a little CPU time go by */ |
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272 } |
2669
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First commit. Added header configs for DS as well as a Makefile. Initial work on framebuffer video driver, currently not functioning as desired.
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273 } while (p < written); |
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274 |
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275 /* If timer synchronization is enabled, set the next write frame */ |
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276 if (this->hidden->frame_ticks) { |
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277 this->hidden->next_frame += this->hidden->frame_ticks; |
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278 } |
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279 |
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280 /* If we couldn't write, assume fatal error for now */ |
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281 if (written < 0) { |
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282 this->enabled = 0; |
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283 } |
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284 #ifdef DEBUG_AUDIO |
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285 fprintf(stderr, "Wrote %d bytes of audio data\n", written); |
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286 #endif |
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287 } |
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288 |
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289 static Uint8 * |
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290 BSDAUDIO_GetDeviceBuf(_THIS) |
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291 { |
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292 return (this->hidden->mixbuf); |
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293 } |
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294 |
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295 static void |
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296 BSDAUDIO_CloseDevice(_THIS) |
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297 { |
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298 if (this->hidden != NULL) { |
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299 if (this->hidden->mixbuf != NULL) { |
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300 SDL_FreeAudioMem(this->hidden->mixbuf); |
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301 this->hidden->mixbuf = NULL; |
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302 } |
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303 if (this->hidden->audio_fd >= 0) { |
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304 close(this->hidden->audio_fd); |
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305 this->hidden->audio_fd = -1; |
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306 } |
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307 SDL_free(this->hidden); |
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308 this->hidden = NULL; |
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309 } |
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310 } |
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Good idea, renaming OpenBSD audio to BSD audio.
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311 |
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312 static int |
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313 BSDAUDIO_OpenDevice(_THIS, const char *devname, int iscapture) |
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314 { |
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315 const int flags = ((iscapture) ? OPEN_FLAGS_INPUT : OPEN_FLAGS_OUTPUT); |
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316 SDL_AudioFormat format = 0; |
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317 audio_info_t info; |
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318 |
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319 /* We don't care what the devname is...we'll try to open anything. */ |
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320 /* ...but default to first name in the list... */ |
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321 if (devname == NULL) { |
2060 | 322 if (((iscapture) && (inputDeviceCount == 0)) || |
323 ((!iscapture) && (outputDeviceCount == 0))) { | |
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324 SDL_SetError("No such audio device"); |
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325 return 0; |
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326 } |
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327 devname = ((iscapture) ? inputDevices[0] : outputDevices[0]); |
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328 } |
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329 |
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330 /* Initialize all variables that we clean on shutdown */ |
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331 this->hidden = (struct SDL_PrivateAudioData *) |
2060 | 332 SDL_malloc((sizeof *this->hidden)); |
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333 if (this->hidden == NULL) { |
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334 SDL_OutOfMemory(); |
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335 return 0; |
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changeset
|
336 } |
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diff
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|
337 SDL_memset(this->hidden, 0, (sizeof *this->hidden)); |
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|
338 |
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diff
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|
339 /* Open the audio device */ |
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diff
changeset
|
340 this->hidden->audio_fd = open(devname, flags, 0); |
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Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff
changeset
|
341 if (this->hidden->audio_fd < 0) { |
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diff
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|
342 SDL_SetError("Couldn't open %s: %s", devname, strerror(errno)); |
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Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff
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|
343 return 0; |
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Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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|
344 } |
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345 |
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|
346 AUDIO_INITINFO(&info); |
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347 |
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348 /* Calculate the final parameters for this audio specification */ |
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|
349 SDL_CalculateAudioSpec(&this->spec); |
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350 |
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|
351 /* Set to play mode */ |
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Good idea, renaming OpenBSD audio to BSD audio.
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diff
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|
352 info.mode = AUMODE_PLAY; |
2049
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353 if (ioctl(this->hidden->audio_fd, AUDIO_SETINFO, &info) < 0) { |
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|
354 BSDAUDIO_CloseDevice(this); |
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355 SDL_SetError("Couldn't put device into play mode"); |
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|
356 return 0; |
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Good idea, renaming OpenBSD audio to BSD audio.
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357 } |
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358 |
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359 AUDIO_INITINFO(&info); |
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|
360 for (format = SDL_FirstAudioFormat(this->spec.format); |
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361 format; format = SDL_NextAudioFormat()) { |
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362 switch (format) { |
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363 case AUDIO_U8: |
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364 info.play.encoding = AUDIO_ENCODING_ULINEAR; |
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365 info.play.precision = 8; |
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366 break; |
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367 case AUDIO_S8: |
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368 info.play.encoding = AUDIO_ENCODING_SLINEAR; |
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369 info.play.precision = 8; |
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370 break; |
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371 case AUDIO_S16LSB: |
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372 info.play.encoding = AUDIO_ENCODING_SLINEAR_LE; |
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373 info.play.precision = 16; |
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374 break; |
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375 case AUDIO_S16MSB: |
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376 info.play.encoding = AUDIO_ENCODING_SLINEAR_BE; |
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377 info.play.precision = 16; |
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378 break; |
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379 case AUDIO_U16LSB: |
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380 info.play.encoding = AUDIO_ENCODING_ULINEAR_LE; |
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381 info.play.precision = 16; |
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382 break; |
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383 case AUDIO_U16MSB: |
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384 info.play.encoding = AUDIO_ENCODING_ULINEAR_BE; |
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385 info.play.precision = 16; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
386 break; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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387 default: |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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388 continue; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
389 } |
2049
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|
390 |
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Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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|
391 if (ioctl(this->hidden->audio_fd, AUDIO_SETINFO, &info) == 0) { |
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|
392 break; |
2049
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|
393 } |
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Good idea, renaming OpenBSD audio to BSD audio.
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parents:
diff
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|
394 } |
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Good idea, renaming OpenBSD audio to BSD audio.
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diff
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|
395 |
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|
396 if (!format) { |
2049
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diff
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|
397 BSDAUDIO_CloseDevice(this); |
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|
398 SDL_SetError("No supported encoding for 0x%x", this->spec.format); |
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|
399 return 0; |
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Good idea, renaming OpenBSD audio to BSD audio.
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parents:
diff
changeset
|
400 } |
12b6d331d82a
Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
401 |
2049
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diff
changeset
|
402 this->spec.format = format; |
1567
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Good idea, renaming OpenBSD audio to BSD audio.
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parents:
diff
changeset
|
403 |
12b6d331d82a
Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
404 AUDIO_INITINFO(&info); |
2049
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diff
changeset
|
405 info.play.channels = this->spec.channels; |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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1982
diff
changeset
|
406 if (ioctl(this->hidden->audio_fd, AUDIO_SETINFO, &info) == -1) { |
5f6550e5184f
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1982
diff
changeset
|
407 this->spec.channels = 1; |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents:
1982
diff
changeset
|
408 } |
1567
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Good idea, renaming OpenBSD audio to BSD audio.
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parents:
diff
changeset
|
409 AUDIO_INITINFO(&info); |
2049
5f6550e5184f
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1982
diff
changeset
|
410 info.play.sample_rate = this->spec.freq; |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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1982
diff
changeset
|
411 info.blocksize = this->spec.size; |
1567
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Good idea, renaming OpenBSD audio to BSD audio.
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parents:
diff
changeset
|
412 info.hiwat = 5; |
12b6d331d82a
Good idea, renaming OpenBSD audio to BSD audio.
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parents:
diff
changeset
|
413 info.lowat = 3; |
2049
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1982
diff
changeset
|
414 (void) ioctl(this->hidden->audio_fd, AUDIO_SETINFO, &info); |
5f6550e5184f
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1982
diff
changeset
|
415 (void) ioctl(this->hidden->audio_fd, AUDIO_GETINFO, &info); |
5f6550e5184f
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1982
diff
changeset
|
416 this->spec.freq = info.play.sample_rate; |
1567
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Good idea, renaming OpenBSD audio to BSD audio.
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parents:
diff
changeset
|
417 /* Allocate mixing buffer */ |
2049
5f6550e5184f
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1982
diff
changeset
|
418 this->hidden->mixlen = this->spec.size; |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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1982
diff
changeset
|
419 this->hidden->mixbuf = (Uint8 *) SDL_AllocAudioMem(this->hidden->mixlen); |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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1982
diff
changeset
|
420 if (this->hidden->mixbuf == NULL) { |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents:
1982
diff
changeset
|
421 BSDAUDIO_CloseDevice(this); |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents:
1982
diff
changeset
|
422 SDL_OutOfMemory(); |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff
changeset
|
423 return 0; |
1567
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Good idea, renaming OpenBSD audio to BSD audio.
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parents:
diff
changeset
|
424 } |
2049
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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1982
diff
changeset
|
425 SDL_memset(this->hidden->mixbuf, this->spec.silence, this->spec.size); |
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diff
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|
426 |
2049
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parents:
1982
diff
changeset
|
427 BSDAUDIO_Status(this); |
1567
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Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
428 |
12b6d331d82a
Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
429 /* We're ready to rock and roll. :-) */ |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff
changeset
|
430 return (0); |
1567
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Good idea, renaming OpenBSD audio to BSD audio.
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parents:
diff
changeset
|
431 } |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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changeset
|
432 |
2049
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1982
diff
changeset
|
433 static int |
2060 | 434 BSDAUDIO_Init(SDL_AudioDriverImpl * impl) |
2049
5f6550e5184f
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parents:
1982
diff
changeset
|
435 { |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents:
1982
diff
changeset
|
436 /* Set the function pointers */ |
5f6550e5184f
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parents:
1982
diff
changeset
|
437 impl->DetectDevices = BSDAUDIO_DetectDevices; |
5f6550e5184f
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parents:
1982
diff
changeset
|
438 impl->GetDeviceName = BSDAUDIO_GetDeviceName; |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents:
1982
diff
changeset
|
439 impl->OpenDevice = BSDAUDIO_OpenDevice; |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents:
1982
diff
changeset
|
440 impl->PlayDevice = BSDAUDIO_PlayDevice; |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents:
1982
diff
changeset
|
441 impl->WaitDevice = BSDAUDIO_WaitDevice; |
5f6550e5184f
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Ryan C. Gordon <icculus@icculus.org>
parents:
1982
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442 impl->GetDeviceBuf = BSDAUDIO_GetDeviceBuf; |
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Ryan C. Gordon <icculus@icculus.org>
parents:
1982
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443 impl->CloseDevice = BSDAUDIO_CloseDevice; |
5f6550e5184f
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Ryan C. Gordon <icculus@icculus.org>
parents:
1982
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444 impl->Deinitialize = BSDAUDIO_Deinitialize; |
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Ryan C. Gordon <icculus@icculus.org>
parents:
1982
diff
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445 |
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Ryan C. Gordon <icculus@icculus.org>
parents:
1982
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446 build_device_lists(); |
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Ryan C. Gordon <icculus@icculus.org>
parents:
1982
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447 return 1; |
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Ryan C. Gordon <icculus@icculus.org>
parents:
1982
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448 } |
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Ryan C. Gordon <icculus@icculus.org>
parents:
1982
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449 |
5f6550e5184f
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Ryan C. Gordon <icculus@icculus.org>
parents:
1982
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450 |
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Ryan C. Gordon <icculus@icculus.org>
parents:
1982
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451 AudioBootStrap BSD_AUDIO_bootstrap = { |
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Ryan C. Gordon <icculus@icculus.org>
parents:
1982
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452 BSD_AUDIO_DRIVER_NAME, BSD_AUDIO_DRIVER_DESC, BSDAUDIO_Init, 0 |
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Ryan C. Gordon <icculus@icculus.org>
parents:
1982
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453 }; |
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Ryan C. Gordon <icculus@icculus.org>
parents:
1982
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454 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1583
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455 /* vi: set ts=4 sw=4 expandtab: */ |