Mercurial > sdl-ios-xcode
annotate src/audio/macosx/SDL_coreaudio.c @ 4834:fd5bb97ec05d
Improving Cocoa implementation and fixed a small bug in SDL_shape.c.
author | egottlieb |
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date | Thu, 05 Aug 2010 18:58:45 -0400 |
parents | 4160ba33b597 |
children | 514f811a4887 |
rev | line source |
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1 /* |
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2 SDL - Simple DirectMedia Layer |
3697 | 3 Copyright (C) 1997-2010 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 #include "SDL_config.h" |
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23 |
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24 #include <CoreAudio/CoreAudio.h> |
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25 #include <CoreServices/CoreServices.h> |
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26 #include <AudioUnit/AudioUnit.h> |
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27 #if MAC_OS_X_VERSION_MAX_ALLOWED <= 1050 |
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28 #include <AudioUnit/AUNTComponent.h> |
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29 #endif |
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30 |
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31 #include "SDL_audio.h" |
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32 #include "../SDL_audio_c.h" |
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33 #include "../SDL_sysaudio.h" |
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34 #include "SDL_coreaudio.h" |
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35 |
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36 #define DEBUG_COREAUDIO 0 |
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37 |
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38 typedef struct COREAUDIO_DeviceList |
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39 { |
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40 AudioDeviceID id; |
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41 const char *name; |
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42 } COREAUDIO_DeviceList; |
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43 |
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44 static COREAUDIO_DeviceList *inputDevices = NULL; |
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45 static int inputDeviceCount = 0; |
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46 static COREAUDIO_DeviceList *outputDevices = NULL; |
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47 static int outputDeviceCount = 0; |
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48 |
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49 static void |
2060 | 50 free_device_list(COREAUDIO_DeviceList ** devices, int *devCount) |
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51 { |
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52 if (*devices) { |
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53 int i = *devCount; |
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54 while (i--) |
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55 SDL_free((void *) (*devices)[i].name); |
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56 SDL_free(*devices); |
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57 *devices = NULL; |
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58 } |
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59 *devCount = 0; |
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60 } |
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61 |
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62 |
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63 static void |
2060 | 64 build_device_list(int iscapture, COREAUDIO_DeviceList ** devices, |
65 int *devCount) | |
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66 { |
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67 Boolean outWritable = 0; |
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68 OSStatus result = noErr; |
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69 UInt32 size = 0; |
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70 AudioDeviceID *devs = NULL; |
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71 UInt32 i = 0; |
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72 UInt32 max = 0; |
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73 |
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74 free_device_list(devices, devCount); |
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75 |
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76 result = AudioHardwareGetPropertyInfo(kAudioHardwarePropertyDevices, |
2060 | 77 &size, &outWritable); |
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78 |
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79 if (result != kAudioHardwareNoError) |
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80 return; |
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81 |
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82 devs = (AudioDeviceID *) alloca(size); |
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83 if (devs == NULL) |
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84 return; |
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85 |
2060 | 86 max = size / sizeof(AudioDeviceID); |
87 *devices = (COREAUDIO_DeviceList *) SDL_malloc(max * sizeof(**devices)); | |
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88 if (*devices == NULL) |
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89 return; |
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90 |
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91 result = AudioHardwareGetProperty(kAudioHardwarePropertyDevices, |
2060 | 92 &size, devs); |
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93 if (result != kAudioHardwareNoError) |
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94 return; |
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95 |
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96 for (i = 0; i < max; i++) { |
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97 CFStringRef cfstr = NULL; |
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98 char *ptr = NULL; |
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99 AudioDeviceID dev = devs[i]; |
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100 AudioBufferList *buflist = NULL; |
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101 int usable = 0; |
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102 CFIndex len = 0; |
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103 |
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104 result = AudioDeviceGetPropertyInfo(dev, 0, iscapture, |
2060 | 105 kAudioDevicePropertyStreamConfiguration, |
106 &size, &outWritable); | |
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107 if (result != noErr) |
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108 continue; |
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109 |
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110 buflist = (AudioBufferList *) SDL_malloc(size); |
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111 if (buflist == NULL) |
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112 continue; |
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113 |
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114 result = AudioDeviceGetProperty(dev, 0, iscapture, |
2060 | 115 kAudioDevicePropertyStreamConfiguration, |
116 &size, buflist); | |
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117 |
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118 if (result == noErr) { |
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119 UInt32 j; |
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120 for (j = 0; j < buflist->mNumberBuffers; j++) { |
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121 if (buflist->mBuffers[j].mNumberChannels > 0) { |
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122 usable = 1; |
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123 break; |
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124 } |
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125 } |
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126 } |
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127 |
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128 SDL_free(buflist); |
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129 |
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130 if (!usable) |
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131 continue; |
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132 |
2060 | 133 size = sizeof(CFStringRef); |
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134 result = AudioDeviceGetProperty(dev, 0, iscapture, |
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135 kAudioDevicePropertyDeviceNameCFString, |
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136 &size, &cfstr); |
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137 |
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138 if (result != kAudioHardwareNoError) |
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139 continue; |
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140 |
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141 len = CFStringGetMaximumSizeForEncoding(CFStringGetLength(cfstr), |
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142 kCFStringEncodingUTF8); |
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143 |
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144 ptr = (char *) SDL_malloc(len + 1); |
2060 | 145 usable = ((ptr != NULL) && |
146 (CFStringGetCString | |
147 (cfstr, ptr, len + 1, kCFStringEncodingUTF8))); | |
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148 |
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149 CFRelease(cfstr); |
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150 |
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151 if (usable) { |
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152 len = strlen(ptr); |
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153 /* Some devices have whitespace at the end...trim it. */ |
2060 | 154 while ((len > 0) && (ptr[len - 1] == ' ')) { |
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155 len--; |
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156 } |
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157 usable = (len > 0); |
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158 } |
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159 |
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160 if (!usable) { |
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161 SDL_free(ptr); |
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162 } else { |
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163 ptr[len] = '\0'; |
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164 |
2060 | 165 #if DEBUG_COREAUDIO |
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166 printf("COREAUDIO: Found %s device #%d: '%s' (devid %d)\n", |
2060 | 167 ((iscapture) ? "capture" : "output"), |
168 (int) *devCount, ptr, (int) dev); | |
169 #endif | |
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170 |
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171 (*devices)[*devCount].id = dev; |
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172 (*devices)[*devCount].name = ptr; |
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173 (*devCount)++; |
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174 } |
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175 } |
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176 } |
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177 |
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178 static inline void |
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179 build_device_lists(void) |
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180 { |
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181 build_device_list(0, &outputDevices, &outputDeviceCount); |
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182 build_device_list(1, &inputDevices, &inputDeviceCount); |
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183 } |
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184 |
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185 |
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186 static inline void |
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187 free_device_lists(void) |
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188 { |
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189 free_device_list(&outputDevices, &outputDeviceCount); |
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190 free_device_list(&inputDevices, &inputDeviceCount); |
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191 } |
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192 |
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193 |
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194 static int |
2060 | 195 find_device_id(const char *devname, int iscapture, AudioDeviceID * id) |
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196 { |
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197 int i = ((iscapture) ? inputDeviceCount : outputDeviceCount); |
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198 COREAUDIO_DeviceList *devs = ((iscapture) ? inputDevices : outputDevices); |
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199 while (i--) { |
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200 if (SDL_strcmp(devname, devs->name) == 0) { |
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201 *id = devs->id; |
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202 return 1; |
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203 } |
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204 devs++; |
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205 } |
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206 |
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207 return 0; |
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208 } |
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209 |
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210 |
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211 static int |
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212 COREAUDIO_DetectDevices(int iscapture) |
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213 { |
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214 if (iscapture) { |
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215 build_device_list(1, &inputDevices, &inputDeviceCount); |
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216 return inputDeviceCount; |
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217 } else { |
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218 build_device_list(0, &outputDevices, &outputDeviceCount); |
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219 return outputDeviceCount; |
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220 } |
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221 |
2060 | 222 return 0; /* shouldn't ever hit this. */ |
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223 } |
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224 |
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225 |
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226 static const char * |
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227 COREAUDIO_GetDeviceName(int index, int iscapture) |
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228 { |
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229 if ((iscapture) && (index < inputDeviceCount)) { |
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230 return inputDevices[index].name; |
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231 } else if ((!iscapture) && (index < outputDeviceCount)) { |
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232 return outputDevices[index].name; |
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233 } |
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234 |
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235 SDL_SetError("No such device"); |
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236 return NULL; |
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237 } |
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238 |
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239 |
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240 static void |
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241 COREAUDIO_Deinitialize(void) |
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242 { |
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243 free_device_lists(); |
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244 } |
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245 |
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246 |
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247 /* The CoreAudio callback */ |
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248 static OSStatus |
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249 outputCallback(void *inRefCon, |
2060 | 250 AudioUnitRenderActionFlags * ioActionFlags, |
251 const AudioTimeStamp * inTimeStamp, | |
252 UInt32 inBusNumber, UInt32 inNumberFrames, | |
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253 AudioBufferList * ioData) |
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254 { |
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255 SDL_AudioDevice *this = (SDL_AudioDevice *) inRefCon; |
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256 AudioBuffer *abuf; |
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257 UInt32 remaining, len; |
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258 void *ptr; |
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259 UInt32 i; |
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260 |
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261 /* Only do anything if audio is enabled and not paused */ |
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262 if (!this->enabled || this->paused) { |
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263 for (i = 0; i < ioData->mNumberBuffers; i++) { |
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264 abuf = &ioData->mBuffers[i]; |
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265 SDL_memset(abuf->mData, this->spec.silence, abuf->mDataByteSize); |
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266 } |
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267 return 0; |
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268 } |
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269 |
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270 /* No SDL conversion should be needed here, ever, since we accept |
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271 any input format in OpenAudio, and leave the conversion to CoreAudio. |
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272 */ |
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273 /* |
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274 assert(!this->convert.needed); |
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275 assert(this->spec.channels == ioData->mNumberChannels); |
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276 */ |
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277 |
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278 for (i = 0; i < ioData->mNumberBuffers; i++) { |
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279 abuf = &ioData->mBuffers[i]; |
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280 remaining = abuf->mDataByteSize; |
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281 ptr = abuf->mData; |
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282 while (remaining > 0) { |
3636 | 283 if (this->hidden->bufferOffset >= this->hidden->bufferSize) { |
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284 /* Generate the data */ |
3636 | 285 SDL_memset(this->hidden->buffer, this->spec.silence, |
286 this->hidden->bufferSize); | |
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287 SDL_mutexP(this->mixer_lock); |
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288 (*this->spec.callback)(this->spec.userdata, |
3636 | 289 this->hidden->buffer, this->hidden->bufferSize); |
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290 SDL_mutexV(this->mixer_lock); |
3636 | 291 this->hidden->bufferOffset = 0; |
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292 } |
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293 |
3636 | 294 len = this->hidden->bufferSize - this->hidden->bufferOffset; |
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295 if (len > remaining) |
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296 len = remaining; |
3636 | 297 SDL_memcpy(ptr, (char *)this->hidden->buffer + |
298 this->hidden->bufferOffset, len); | |
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299 ptr = (char *)ptr + len; |
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300 remaining -= len; |
3636 | 301 this->hidden->bufferOffset += len; |
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302 } |
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303 } |
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304 |
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305 return 0; |
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306 } |
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307 |
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308 static OSStatus |
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309 inputCallback(void *inRefCon, |
2060 | 310 AudioUnitRenderActionFlags * ioActionFlags, |
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311 const AudioTimeStamp * inTimeStamp, |
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312 UInt32 inBusNumber, UInt32 inNumberFrames, |
2060 | 313 AudioBufferList * ioData) |
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314 { |
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315 //err = AudioUnitRender(afr->fAudioUnit, ioActionFlags, inTimeStamp, inBusNumber, inNumberFrames, afr->fAudioBuffer); |
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316 // !!! FIXME: write me! |
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317 return noErr; |
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318 } |
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319 |
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320 |
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321 static void |
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322 COREAUDIO_CloseDevice(_THIS) |
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323 { |
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324 if (this->hidden != NULL) { |
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325 if (this->hidden->audioUnitOpened) { |
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326 OSStatus result = noErr; |
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327 AURenderCallbackStruct callback; |
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328 const AudioUnitElement output_bus = 0; |
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329 const AudioUnitElement input_bus = 1; |
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330 const int iscapture = this->iscapture; |
2060 | 331 const AudioUnitElement bus = |
332 ((iscapture) ? input_bus : output_bus); | |
333 const AudioUnitScope scope = | |
334 ((iscapture) ? kAudioUnitScope_Output : | |
335 kAudioUnitScope_Input); | |
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336 |
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337 /* stop processing the audio unit */ |
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338 result = AudioOutputUnitStop(this->hidden->audioUnit); |
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339 |
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340 /* Remove the input callback */ |
2060 | 341 SDL_memset(&callback, '\0', sizeof(AURenderCallbackStruct)); |
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342 result = AudioUnitSetProperty(this->hidden->audioUnit, |
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343 kAudioUnitProperty_SetRenderCallback, |
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344 scope, bus, &callback, |
2060 | 345 sizeof(callback)); |
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346 |
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347 CloseComponent(this->hidden->audioUnit); |
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348 this->hidden->audioUnitOpened = 0; |
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349 } |
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350 SDL_free(this->hidden->buffer); |
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351 SDL_free(this->hidden); |
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352 this->hidden = NULL; |
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353 } |
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354 } |
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355 |
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356 |
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357 #define CHECK_RESULT(msg) \ |
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358 if (result != noErr) { \ |
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359 COREAUDIO_CloseDevice(this); \ |
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360 SDL_SetError("CoreAudio error (%s): %d", msg, (int) result); \ |
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361 return 0; \ |
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362 } |
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363 |
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364 static int |
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365 find_device_by_name(_THIS, const char *devname, int iscapture) |
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366 { |
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367 AudioDeviceID devid = 0; |
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368 OSStatus result = noErr; |
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369 UInt32 size = 0; |
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370 UInt32 alive = 0; |
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371 pid_t pid = 0; |
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372 |
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373 if (devname == NULL) { |
2060 | 374 size = sizeof(AudioDeviceID); |
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375 const AudioHardwarePropertyID propid = |
2060 | 376 ((iscapture) ? kAudioHardwarePropertyDefaultInputDevice : |
377 kAudioHardwarePropertyDefaultOutputDevice); | |
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378 |
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379 result = AudioHardwareGetProperty(propid, &size, &devid); |
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380 CHECK_RESULT("AudioHardwareGetProperty (default device)"); |
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381 } else { |
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382 if (!find_device_id(devname, iscapture, &devid)) { |
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383 SDL_SetError("CoreAudio: No such audio device."); |
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384 return 0; |
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385 } |
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386 } |
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387 |
2060 | 388 size = sizeof(alive); |
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389 result = AudioDeviceGetProperty(devid, 0, iscapture, |
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390 kAudioDevicePropertyDeviceIsAlive, |
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391 &size, &alive); |
2060 | 392 CHECK_RESULT |
393 ("AudioDeviceGetProperty (kAudioDevicePropertyDeviceIsAlive)"); | |
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394 |
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395 if (!alive) { |
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396 SDL_SetError("CoreAudio: requested device exists, but isn't alive."); |
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397 return 0; |
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398 } |
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399 |
2060 | 400 size = sizeof(pid); |
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401 result = AudioDeviceGetProperty(devid, 0, iscapture, |
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402 kAudioDevicePropertyHogMode, &size, &pid); |
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403 |
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404 /* some devices don't support this property, so errors are fine here. */ |
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405 if ((result == noErr) && (pid != -1)) { |
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406 SDL_SetError("CoreAudio: requested device is being hogged."); |
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407 return 0; |
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408 } |
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409 |
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410 this->hidden->deviceID = devid; |
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411 return 1; |
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412 } |
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413 |
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414 |
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415 static int |
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416 prepare_audiounit(_THIS, const char *devname, int iscapture, |
2060 | 417 const AudioStreamBasicDescription * strdesc) |
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418 { |
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419 OSStatus result = noErr; |
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420 AURenderCallbackStruct callback; |
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421 ComponentDescription desc; |
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422 Component comp = NULL; |
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423 const AudioUnitElement output_bus = 0; |
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424 const AudioUnitElement input_bus = 1; |
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425 const AudioUnitElement bus = ((iscapture) ? input_bus : output_bus); |
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426 const AudioUnitScope scope = ((iscapture) ? kAudioUnitScope_Output : |
2060 | 427 kAudioUnitScope_Input); |
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428 |
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429 if (!find_device_by_name(this, devname, iscapture)) { |
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430 SDL_SetError("Couldn't find requested CoreAudio device"); |
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431 return 0; |
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432 } |
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433 |
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434 SDL_memset(&desc, '\0', sizeof(ComponentDescription)); |
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435 desc.componentType = kAudioUnitType_Output; |
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436 desc.componentSubType = kAudioUnitSubType_DefaultOutput; |
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437 desc.componentManufacturer = kAudioUnitManufacturer_Apple; |
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438 |
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439 comp = FindNextComponent(NULL, &desc); |
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440 if (comp == NULL) { |
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441 SDL_SetError("Couldn't find requested CoreAudio component"); |
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442 return 0; |
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443 } |
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444 |
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445 /* Open & initialize the audio unit */ |
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446 result = OpenAComponent(comp, &this->hidden->audioUnit); |
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447 CHECK_RESULT("OpenAComponent"); |
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448 |
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449 this->hidden->audioUnitOpened = 1; |
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450 |
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451 result = AudioUnitSetProperty(this->hidden->audioUnit, |
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452 kAudioOutputUnitProperty_CurrentDevice, |
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453 kAudioUnitScope_Global, 0, |
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454 &this->hidden->deviceID, |
2060 | 455 sizeof(AudioDeviceID)); |
456 CHECK_RESULT | |
457 ("AudioUnitSetProperty (kAudioOutputUnitProperty_CurrentDevice)"); | |
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458 |
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459 /* Set the data format of the audio unit. */ |
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460 result = AudioUnitSetProperty(this->hidden->audioUnit, |
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461 kAudioUnitProperty_StreamFormat, |
2060 | 462 scope, bus, strdesc, sizeof(*strdesc)); |
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463 CHECK_RESULT("AudioUnitSetProperty (kAudioUnitProperty_StreamFormat)"); |
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464 |
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465 /* Set the audio callback */ |
2060 | 466 SDL_memset(&callback, '\0', sizeof(AURenderCallbackStruct)); |
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467 callback.inputProc = ((iscapture) ? inputCallback : outputCallback); |
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468 callback.inputProcRefCon = this; |
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469 result = AudioUnitSetProperty(this->hidden->audioUnit, |
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470 kAudioUnitProperty_SetRenderCallback, |
2060 | 471 scope, bus, &callback, sizeof(callback)); |
472 CHECK_RESULT | |
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473 ("AudioUnitSetProperty (kAudioUnitProperty_SetRenderCallback)"); |
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474 |
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475 /* Calculate the final parameters for this audio specification */ |
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476 SDL_CalculateAudioSpec(&this->spec); |
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477 |
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478 /* Allocate a sample buffer */ |
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479 this->hidden->bufferOffset = this->hidden->bufferSize = this->spec.size; |
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480 this->hidden->buffer = SDL_malloc(this->hidden->bufferSize); |
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481 |
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482 result = AudioUnitInitialize(this->hidden->audioUnit); |
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483 CHECK_RESULT("AudioUnitInitialize"); |
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484 |
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485 /* Finally, start processing of the audio unit */ |
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486 result = AudioOutputUnitStart(this->hidden->audioUnit); |
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487 CHECK_RESULT("AudioOutputUnitStart"); |
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488 |
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489 /* We're running! */ |
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490 return 1; |
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491 } |
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492 |
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493 |
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494 static int |
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495 COREAUDIO_OpenDevice(_THIS, const char *devname, int iscapture) |
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496 { |
2016 | 497 AudioStreamBasicDescription strdesc; |
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498 SDL_AudioFormat test_format = SDL_FirstAudioFormat(this->spec.format); |
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499 int valid_datatype = 0; |
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500 |
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501 /* Initialize all variables that we clean on shutdown */ |
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502 this->hidden = (struct SDL_PrivateAudioData *) |
2060 | 503 SDL_malloc((sizeof *this->hidden)); |
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504 if (this->hidden == NULL) { |
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505 SDL_OutOfMemory(); |
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506 return (0); |
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507 } |
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508 SDL_memset(this->hidden, 0, (sizeof *this->hidden)); |
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509 |
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510 /* Setup a AudioStreamBasicDescription with the requested format */ |
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511 SDL_memset(&strdesc, '\0', sizeof(AudioStreamBasicDescription)); |
2016 | 512 strdesc.mFormatID = kAudioFormatLinearPCM; |
513 strdesc.mFormatFlags = kLinearPCMFormatFlagIsPacked; | |
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514 strdesc.mChannelsPerFrame = this->spec.channels; |
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515 strdesc.mSampleRate = this->spec.freq; |
2016 | 516 strdesc.mFramesPerPacket = 1; |
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517 |
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518 while ((!valid_datatype) && (test_format)) { |
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519 this->spec.format = test_format; |
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520 /* Just a list of valid SDL formats, so people don't pass junk here. */ |
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521 switch (test_format) { |
2043 | 522 case AUDIO_U8: |
523 case AUDIO_S8: | |
524 case AUDIO_U16LSB: | |
525 case AUDIO_S16LSB: | |
526 case AUDIO_U16MSB: | |
527 case AUDIO_S16MSB: | |
528 case AUDIO_S32LSB: | |
529 case AUDIO_S32MSB: | |
530 case AUDIO_F32LSB: | |
531 case AUDIO_F32MSB: | |
532 valid_datatype = 1; | |
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533 strdesc.mBitsPerChannel = SDL_AUDIO_BITSIZE(this->spec.format); |
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534 if (SDL_AUDIO_ISBIGENDIAN(this->spec.format)) |
2043 | 535 strdesc.mFormatFlags |= kLinearPCMFormatFlagIsBigEndian; |
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536 |
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537 if (SDL_AUDIO_ISFLOAT(this->spec.format)) |
2043 | 538 strdesc.mFormatFlags |= kLinearPCMFormatFlagIsFloat; |
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539 else if (SDL_AUDIO_ISSIGNED(this->spec.format)) |
2043 | 540 strdesc.mFormatFlags |= kLinearPCMFormatFlagIsSignedInteger; |
541 break; | |
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542 } |
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543 } |
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544 |
2043 | 545 if (!valid_datatype) { /* shouldn't happen, but just in case... */ |
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546 COREAUDIO_CloseDevice(this); |
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547 SDL_SetError("Unsupported audio format"); |
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548 return 0; |
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549 } |
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550 |
2016 | 551 strdesc.mBytesPerFrame = |
552 strdesc.mBitsPerChannel * strdesc.mChannelsPerFrame / 8; | |
553 strdesc.mBytesPerPacket = | |
554 strdesc.mBytesPerFrame * strdesc.mFramesPerPacket; | |
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555 |
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556 if (!prepare_audiounit(this, devname, iscapture, &strdesc)) { |
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557 COREAUDIO_CloseDevice(this); |
2060 | 558 return 0; /* prepare_audiounit() will call SDL_SetError()... */ |
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559 } |
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560 |
2060 | 561 return 1; /* good to go. */ |
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562 } |
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563 |
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564 static int |
2060 | 565 COREAUDIO_Init(SDL_AudioDriverImpl * impl) |
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566 { |
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567 /* Set the function pointers */ |
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568 impl->DetectDevices = COREAUDIO_DetectDevices; |
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569 impl->GetDeviceName = COREAUDIO_GetDeviceName; |
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570 impl->OpenDevice = COREAUDIO_OpenDevice; |
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571 impl->CloseDevice = COREAUDIO_CloseDevice; |
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572 impl->Deinitialize = COREAUDIO_Deinitialize; |
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573 impl->ProvidesOwnCallbackThread = 1; |
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574 |
2060 | 575 build_device_lists(); /* do an initial check for devices... */ |
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576 |
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577 return 1; /* this audio target is available. */ |
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578 } |
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579 |
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580 AudioBootStrap COREAUDIO_bootstrap = { |
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581 "coreaudio", "Mac OS X CoreAudio", COREAUDIO_Init, 0 |
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582 }; |
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583 |
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584 /* vi: set ts=4 sw=4 expandtab: */ |