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annotate src/audio/macosx/SDL_coreaudio.c @ 3785:da2ea0694d11 SDL-ryan-multiple-audio-device

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Ton of work on CoreAudio driver for new 1.3 features...most of the multi-device support is wired up, and the starts of capture support, too. All is still subject to change, and what's there is still a little flakey.
author Ryan C. Gordon <icculus@icculus.org>
date Tue, 03 Oct 2006 05:58:44 +0000
parents 37c9c4590689
children b70f4e9291bb
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 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 <AudioUnit/AudioUnit.h>
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26
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27 #include "SDL_audio.h"
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28 #include "../SDL_audio_c.h"
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29 #include "../SDL_sysaudio.h"
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30 #include "SDL_coreaudio.h"
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31
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32
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33 typedef struct COREAUDIO_DeviceList
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34 {
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35 AudioDeviceID id;
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36 const char *name;
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37 } COREAUDIO_DeviceList;
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38
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39 static COREAUDIO_DeviceList *inputDevices = NULL;
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40 static int inputDeviceCount = 0;
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41 static COREAUDIO_DeviceList *outputDevices = NULL;
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42 static int outputDeviceCount = 0;
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43
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44 static void
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45 free_device_list(COREAUDIO_DeviceList **devices, int *devCount)
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46 {
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47 if (*devices) {
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48 int i = *devCount;
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49 while (i--)
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50 SDL_free((void *) (*devices)[i].name);
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51 SDL_free(*devices);
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52 *devices = NULL;
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53 }
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54 *devCount = 0;
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55 }
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56
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57
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58 static void
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59 build_device_list(int iscapture, COREAUDIO_DeviceList **devices, int *devCount)
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60 {
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61 Boolean outWritable = 0;
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62 OSStatus result = noErr;
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63 UInt32 size = 0;
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64 AudioDeviceID *devs = NULL;
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65 UInt32 i = 0;
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66 UInt32 max = 0;
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67
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68 free_device_list(devices, devCount);
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69
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70 result = AudioHardwareGetPropertyInfo(kAudioHardwarePropertyDevices,
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71 &size, &outWritable);
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72
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73 if (result != kAudioHardwareNoError)
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74 return;
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75
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76 devs = (AudioDeviceID *) alloca(size);
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77 if (devs == NULL)
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78 return;
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79
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80 max = size / sizeof (AudioDeviceID);
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81 *devices = (COREAUDIO_DeviceList *) SDL_malloc(max * sizeof (**devices));
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82 if (*devices == NULL)
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83 return;
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84
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85 result = AudioHardwareGetProperty(kAudioHardwarePropertyDevices,
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86 &size, devs);
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87 if (result != kAudioHardwareNoError)
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88 return;
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89
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90 for (i = 0; i < max; i++) {
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91 char *ptr = NULL;
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92 AudioDeviceID dev = devs[i];
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93 AudioBufferList *buflist = NULL;
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94 int usable = 0;
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95
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96 result = AudioDeviceGetPropertyInfo(dev, 0, iscapture,
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97 kAudioDevicePropertyStreamConfiguration,
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98 &size, &outWritable);
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99 if (result != noErr)
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100 continue;
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101
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102 buflist = (AudioBufferList *) SDL_malloc(size);
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103 if (buflist == NULL)
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104 continue;
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105
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106 result = AudioDeviceGetProperty(dev, 0, iscapture,
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107 kAudioDevicePropertyStreamConfiguration,
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108 &size, buflist);
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109
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110 if (result == noErr) {
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111 UInt32 j;
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112 for (j = 0; j < buflist->mNumberBuffers; j++) {
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113 if (buflist->mBuffers[j].mNumberChannels > 0) {
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114 usable = 1;
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115 break;
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116 }
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117 }
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118 }
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119
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120 SDL_free(buflist);
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121
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122 if (!usable)
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123 continue;
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124
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125 /* !!! FIXME: use CFStrings, instead, and convert to UTF-8. */
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126 result = AudioDeviceGetPropertyInfo(dev, 0, iscapture,
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127 kAudioDevicePropertyDeviceName,
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128 &size, &outWritable);
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129
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130 if (result != kAudioHardwareNoError)
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131 continue;
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132
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133 ptr = (char *) SDL_malloc(size + 1);
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134 if (ptr == NULL)
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135 continue;
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136
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137 result = AudioDeviceGetProperty(dev, 0, iscapture,
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138 kAudioDevicePropertyDeviceName,
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139 &size, ptr);
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140
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141 if (result != kAudioHardwareNoError)
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142 continue;
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143
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144 while ((size > 0) && (ptr[size-1] == ' '))
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145 size--; /* I have a USB device with whitespace at the end... */
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146
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147 if (size == 0) {
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148 SDL_free(ptr);
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149 } else {
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150 ptr[size] = '\0';
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151 (*devices)[*devCount].id = dev;
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152 (*devices)[*devCount].name = ptr;
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153 (*devCount)++;
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154 }
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155 }
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156 }
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157
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158 static int
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159 find_device_id(const char *devname, int iscapture, AudioDeviceID *id)
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160 {
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161 int i = ((iscapture) ? inputDeviceCount : outputDeviceCount);
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162 COREAUDIO_DeviceList *devs = ((iscapture) ? inputDevices : outputDevices);
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163 while (i--) {
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164 if (SDL_strcmp(devname, devs->name) == 0) {
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165 *id = devs->id;
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166 return 1;
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167 }
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168 devs++;
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169 }
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170
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171 return 0;
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172 }
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173
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174
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175 /* Audio driver functions */
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176
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177 static int COREAUDIO_OpenAudio(_THIS, const char *devname, int iscapture);
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178 static void COREAUDIO_WaitAudio(_THIS);
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179 static void COREAUDIO_PlayAudio(_THIS);
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180 static Uint8 *COREAUDIO_GetAudioBuf(_THIS);
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181 static void COREAUDIO_CloseAudio(_THIS);
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182
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183 /* Audio driver bootstrap functions */
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184
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185 static int
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186 COREAUDIO_Available(void)
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187 {
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188 return (1);
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189 }
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190
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191 static int
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192 COREAUDIO_Init(SDL_AudioDriverImpl *impl)
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193 {
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194 /* !!! FIXME: should these _really_ be static? */
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195 build_device_list(0, &outputDevices, &outputDeviceCount);
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196 build_device_list(1, &inputDevices, &inputDeviceCount);
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197
3784
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198 /* Set the function pointers */
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199 impl->OpenAudio = COREAUDIO_OpenAudio;
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200 impl->WaitAudio = COREAUDIO_WaitAudio;
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201 impl->PlayAudio = COREAUDIO_PlayAudio;
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diff changeset
202 impl->GetAudioBuf = COREAUDIO_GetAudioBuf;
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203 impl->CloseAudio = COREAUDIO_CloseAudio;
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204
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205 return 1;
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206 }
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207
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diff changeset
208 AudioBootStrap COREAUDIO_bootstrap = {
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209 "coreaudio", "Mac OS X CoreAudio",
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diff changeset
210 COREAUDIO_Available, COREAUDIO_Init
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diff changeset
211 };
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212
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213 /* The CoreAudio callback */
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214 static OSStatus
3785
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215 outputCallback(void *inRefCon,
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216 AudioUnitRenderActionFlags *ioActionFlags,
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217 const AudioTimeStamp * inTimeStamp,
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218 UInt32 inBusNumber, UInt32 inNumberFrames,
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diff changeset
219 AudioBufferList *ioDataList)
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220 {
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diff changeset
221 SDL_AudioDevice *this = (SDL_AudioDevice *) inRefCon;
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222 AudioBuffer *ioData = &ioDataList->mBuffers[0];
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223 UInt32 remaining, len;
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diff changeset
224 void *ptr;
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diff changeset
225
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226 if (ioDataList->mNumberBuffers != 1) {
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227 fprintf(stderr, "!!! FIXME SDL!\n");
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228 return noErr;
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diff changeset
229 }
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diff changeset
230
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diff changeset
231 /* Only do anything if audio is enabled and not paused */
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diff changeset
232 if (!this->enabled || this->paused) {
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
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parents: 1312
diff changeset
233 SDL_memset(ioData->mData, this->spec.silence, ioData->mDataByteSize);
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234 return 0;
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235 }
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diff changeset
236
935
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237 /* No SDL conversion should be needed here, ever, since we accept
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238 any input format in OpenAudio, and leave the conversion to CoreAudio.
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diff changeset
239 */
1338
604d73db6802 Removed uses of stdlib.h and string.h
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diff changeset
240 /*
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diff changeset
241 assert(!this->convert.needed);
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242 assert(this->spec.channels == ioData->mNumberChannels);
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diff changeset
243 */
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diff changeset
244
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diff changeset
245 remaining = ioData->mDataByteSize;
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diff changeset
246 ptr = ioData->mData;
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
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diff changeset
247 while (remaining > 0) {
3784
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diff changeset
248 if (this->hidden->bufferOffset >= this->hidden->bufferSize) {
935
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diff changeset
249 /* Generate the data */
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diff changeset
250 SDL_memset(this->hidden->buffer, this->spec.silence,
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diff changeset
251 this->hidden->bufferSize);
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diff changeset
252 SDL_mutexP(this->mixer_lock);
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diff changeset
253 (*this->spec.callback) (this->spec.userdata, this->hidden->buffer,
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diff changeset
254 this->hidden->bufferSize);
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diff changeset
255 SDL_mutexV(this->mixer_lock);
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diff changeset
256 this->hidden->bufferOffset = 0;
935
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257 }
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258
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259 len = this->hidden->bufferSize - this->hidden->bufferOffset;
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260 if (len > remaining)
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261 len = remaining;
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262 SDL_memcpy(ptr,
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263 (char *) this->hidden->buffer + this->hidden->bufferOffset,
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264 len);
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265 ptr = (char *) ptr + len;
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266 remaining -= len;
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267 this->hidden->bufferOffset += len;
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268 }
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269
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270 return 0;
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271 }
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272
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273 static OSStatus
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274 inputCallback(void *inRefCon,
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275 AudioUnitRenderActionFlags *ioActionFlags,
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276 const AudioTimeStamp * inTimeStamp,
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277 UInt32 inBusNumber, UInt32 inNumberFrames,
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278 AudioBufferList *ioData)
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279 {
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280 //err = AudioUnitRender(afr->fAudioUnit, ioActionFlags, inTimeStamp, inBusNumber, inNumberFrames, afr->fAudioBuffer);
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281 // !!! FIXME: write me!
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282 return noErr;
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283 }
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284
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285
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286 /* Dummy functions -- we don't use thread-based audio */
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287 void
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288 COREAUDIO_WaitAudio(_THIS)
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289 {
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290 return;
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291 }
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292
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293 void
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294 COREAUDIO_PlayAudio(_THIS)
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295 {
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296 return;
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297 }
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298
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299 Uint8 *
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300 COREAUDIO_GetAudioBuf(_THIS)
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301 {
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302 return (NULL);
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303 }
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304
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305 void
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306 COREAUDIO_CloseAudio(_THIS)
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307 {
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308 if (this->hidden != NULL) {
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309 OSStatus result = noErr;
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310 AURenderCallbackStruct callback;
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311 const AudioUnitElement output_bus = 0;
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312 const AudioUnitElement input_bus = 1;
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313 const int iscapture = this->hidden->isCapture;
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314 const AudioUnitElement bus = ((iscapture) ? input_bus : output_bus);
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315 const AudioUnitScope scope = ((iscapture) ? kAudioUnitScope_Output :
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316 kAudioUnitScope_Input);
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317
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318 /* stop processing the audio unit */
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319 result = AudioOutputUnitStop(this->hidden->audioUnit);
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320
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321 /* Remove the input callback */
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322 memset(&callback, '\0', sizeof (AURenderCallbackStruct));
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323 result = AudioUnitSetProperty(this->hidden->audioUnit,
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324 kAudioUnitProperty_SetRenderCallback,
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325 scope, bus, &callback, sizeof (callback));
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326
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327 CloseComponent(this->hidden->audioUnit);
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328
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329 SDL_free(this->hidden->buffer);
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330 SDL_free(this->hidden);
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331 this->hidden = NULL;
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332 }
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333 }
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334
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335
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336 #define CHECK_RESULT(msg) \
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337 if (result != noErr) { \
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338 COREAUDIO_CloseAudio(this); \
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339 SDL_SetError("CoreAudio error (%s): %d", msg, (int) result); \
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340 return 0; \
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341 }
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342
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343 static int
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344 find_device_by_name(_THIS, const char *devname, int iscapture)
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345 {
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346 AudioDeviceID devid = 0;
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347 OSStatus result = noErr;
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348 UInt32 size = 0;
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349 UInt32 alive = 0;
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350 pid_t pid = 0;
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351
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352 if (devname == NULL) {
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353 size = sizeof (AudioDeviceID);
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354 const AudioHardwarePropertyID propid =
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355 ((iscapture) ? kAudioHardwarePropertyDefaultInputDevice :
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356 kAudioHardwarePropertyDefaultOutputDevice);
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357
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358 result = AudioHardwareGetProperty(propid, &size, &devid);
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359 CHECK_RESULT("AudioHardwareGetProperty (default device)");
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360 } else {
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361 if (!find_device_id(devname, iscapture, &devid)) {
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362 SDL_SetError("CoreAudio: No such audio device.");
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363 return 0;
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364 }
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365 }
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366
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367 size = sizeof (alive);
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368 result = AudioDeviceGetProperty(devid, 0, iscapture,
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369 kAudioDevicePropertyDeviceIsAlive,
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370 &size, &alive);
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371 CHECK_RESULT("AudioDeviceGetProperty (kAudioDevicePropertyDeviceIsAlive)");
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372
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373 if (!alive) {
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374 SDL_SetError("CoreAudio: requested device exists, but isn't alive.");
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375 return 0;
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376 }
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377
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378 size = sizeof (pid);
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379 result = AudioDeviceGetProperty(devid, 0, iscapture,
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380 kAudioDevicePropertyHogMode, &size, &pid);
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381
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382 /* some devices don't support this property, so errors are fine here. */
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383 if ((result == noErr) && (pid != -1)) {
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384 SDL_SetError("CoreAudio: requested device is being hogged.");
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385 return 0;
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386 }
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
387
3785
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
388 this->hidden->deviceID = devid;
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
389 return 1;
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
390 }
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
391
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
392
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
393 static int
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
394 prepare_audiounit(_THIS, const char *devname, int iscapture,
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
395 const AudioStreamBasicDescription *strdesc)
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
396 {
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
397 OSStatus result = noErr;
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
398 AURenderCallbackStruct callback;
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
399 ComponentDescription desc;
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
400 Component comp = NULL;
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
401 int use_system_device = 0;
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
402 UInt32 enableIO = 0;
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
403 const AudioUnitElement output_bus = 0;
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
404 const AudioUnitElement input_bus = 1;
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
405 const AudioUnitElement bus = ((iscapture) ? input_bus : output_bus);
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
406 const AudioUnitScope scope = ((iscapture) ? kAudioUnitScope_Output :
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
407 kAudioUnitScope_Input);
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
408
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
409 /* !!! FIXME: move something like this to higher level. */
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
410 if ( (devname == NULL) && (SDL_getenv("SDL_AUDIO_DEVNAME")) )
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
411 devname = SDL_getenv("SDL_AUDIO_DEVNAME");
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Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
412
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
413 if (!find_device_by_name(this, devname, iscapture)) {
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
414 SDL_SetError("Couldn't find requested CoreAudio device");
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
415 return 0;
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
416 }
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
417
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
418 memset(&desc, '\0', sizeof(ComponentDescription));
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
419 desc.componentType = kAudioUnitType_Output;
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Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
420 desc.componentSubType = kAudioUnitSubType_HALOutput;
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
421 desc.componentManufacturer = kAudioUnitManufacturer_Apple;
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
422
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
423 comp = FindNextComponent(NULL, &desc);
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
424 if (comp == NULL) {
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
425 SDL_SetError("Couldn't find requested CoreAudio component");
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
426 return 0;
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
427 }
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
428
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
429 /* Open & initialize the audio unit */
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
430 result = OpenAComponent(comp, &this->hidden->audioUnit);
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
431 CHECK_RESULT("OpenAComponent");
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
432
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
433 // !!! FIXME: this is wrong?
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
434 enableIO = ((iscapture) ? 1 : 0);
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
435 result = AudioUnitSetProperty(this->hidden->audioUnit,
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
436 kAudioOutputUnitProperty_EnableIO,
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
437 kAudioUnitScope_Input, input_bus,
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
438 &enableIO, sizeof (enableIO));
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
439 CHECK_RESULT("AudioUnitSetProperty (kAudioUnitProperty_EnableIO input)");
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
440
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
441 // !!! FIXME: this is wrong?
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
442 enableIO = ((iscapture) ? 0 : 1);
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
443 result = AudioUnitSetProperty(this->hidden->audioUnit,
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
444 kAudioOutputUnitProperty_EnableIO,
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
445 kAudioUnitScope_Output, output_bus,
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
446 &enableIO, sizeof (enableIO));
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
447 CHECK_RESULT("AudioUnitSetProperty (kAudioUnitProperty_EnableIO output)");
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
448
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
449 result = AudioUnitSetProperty(this->hidden->audioUnit,
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
450 kAudioOutputUnitProperty_CurrentDevice,
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
451 kAudioUnitScope_Global, 0,
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
452 &this->hidden->deviceID,
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
453 sizeof (AudioDeviceID));
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
454 CHECK_RESULT("AudioUnitSetProperty (kAudioOutputUnitProperty_CurrentDevice)");
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
455
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
456 /* Set the data format of the audio unit. */
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
457 result = AudioUnitSetProperty(this->hidden->audioUnit,
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
458 kAudioUnitProperty_StreamFormat,
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
459 scope, bus, strdesc, sizeof (*strdesc));
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
460 CHECK_RESULT("AudioUnitSetProperty (kAudioUnitProperty_StreamFormat)");
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
461
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
462 /* Set the audio callback */
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
463 memset(&callback, '\0', sizeof (AURenderCallbackStruct));
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
464 callback.inputProc = ((iscapture) ? inputCallback : outputCallback);
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
465 callback.inputProcRefCon = this;
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
466 result = AudioUnitSetProperty(this->hidden->audioUnit,
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
467 kAudioUnitProperty_SetRenderCallback,
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
468 scope, bus, &callback, sizeof (callback));
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
469 CHECK_RESULT("AudioUnitSetProperty (kAudioUnitProperty_SetInputCallback)");
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
470
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
471 /* Calculate the final parameters for this audio specification */
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
472 SDL_CalculateAudioSpec(&this->spec);
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
473
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
474 /* Allocate a sample buffer */
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
475 this->hidden->bufferOffset = this->hidden->bufferSize = this->spec.size;
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
476 this->hidden->buffer = SDL_malloc(this->hidden->bufferSize);
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
477
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
478 result = AudioUnitInitialize(this->hidden->audioUnit);
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
479 CHECK_RESULT("AudioUnitInitialize");
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
480
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
481 /* Finally, start processing of the audio unit */
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
482 result = AudioOutputUnitStart(this->hidden->audioUnit);
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
483 CHECK_RESULT("AudioOutputUnitStart");
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
484
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
485 /* We're running! */
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
486 return 1;
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
487 }
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
488
935
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
489
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1487
diff changeset
490 int
3784
37c9c4590689 First batch of heavy lifting on supporting multiple audio devices at once.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
491 COREAUDIO_OpenAudio(_THIS, const char *devname, int iscapture)
935
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
492 {
2016
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
493 AudioStreamBasicDescription strdesc;
3784
37c9c4590689 First batch of heavy lifting on supporting multiple audio devices at once.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
494 SDL_AudioFormat test_format = SDL_FirstAudioFormat(this->spec.format);
2003
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
495 int valid_datatype = 0;
935
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
496
3784
37c9c4590689 First batch of heavy lifting on supporting multiple audio devices at once.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
497 /* Initialize all variables that we clean on shutdown */
37c9c4590689 First batch of heavy lifting on supporting multiple audio devices at once.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
498 this->hidden = (struct SDL_PrivateAudioData *)
37c9c4590689 First batch of heavy lifting on supporting multiple audio devices at once.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
499 SDL_malloc((sizeof *this->hidden));
37c9c4590689 First batch of heavy lifting on supporting multiple audio devices at once.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
500 if (this->hidden == NULL) {
37c9c4590689 First batch of heavy lifting on supporting multiple audio devices at once.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
501 SDL_OutOfMemory();
37c9c4590689 First batch of heavy lifting on supporting multiple audio devices at once.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
502 return (0);
37c9c4590689 First batch of heavy lifting on supporting multiple audio devices at once.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
503 }
37c9c4590689 First batch of heavy lifting on supporting multiple audio devices at once.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
504 SDL_memset(this->hidden, 0, (sizeof *this->hidden));
37c9c4590689 First batch of heavy lifting on supporting multiple audio devices at once.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
505
3785
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
506 this->hidden->isCapture = iscapture;
3784
37c9c4590689 First batch of heavy lifting on supporting multiple audio devices at once.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
507
935
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
508 /* Setup a AudioStreamBasicDescription with the requested format */
2043
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
509 memset(&strdesc, '\0', sizeof(AudioStreamBasicDescription));
2016
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
510 strdesc.mFormatID = kAudioFormatLinearPCM;
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
511 strdesc.mFormatFlags = kLinearPCMFormatFlagIsPacked;
3784
37c9c4590689 First batch of heavy lifting on supporting multiple audio devices at once.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
512 strdesc.mChannelsPerFrame = this->spec.channels;
37c9c4590689 First batch of heavy lifting on supporting multiple audio devices at once.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
513 strdesc.mSampleRate = this->spec.freq;
2016
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
514 strdesc.mFramesPerPacket = 1;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1487
diff changeset
515
2003
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
516 while ((!valid_datatype) && (test_format)) {
3784
37c9c4590689 First batch of heavy lifting on supporting multiple audio devices at once.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
517 this->spec.format = test_format;
2003
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
518 /* Just a list of valid SDL formats, so people don't pass junk here. */
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
519 switch (test_format) {
2043
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
520 case AUDIO_U8:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
521 case AUDIO_S8:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
522 case AUDIO_U16LSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
523 case AUDIO_S16LSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
524 case AUDIO_U16MSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
525 case AUDIO_S16MSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
526 case AUDIO_S32LSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
527 case AUDIO_S32MSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
528 case AUDIO_F32LSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
529 case AUDIO_F32MSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
530 valid_datatype = 1;
3784
37c9c4590689 First batch of heavy lifting on supporting multiple audio devices at once.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
531 strdesc.mBitsPerChannel = SDL_AUDIO_BITSIZE(this->spec.format);
37c9c4590689 First batch of heavy lifting on supporting multiple audio devices at once.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
532 if (SDL_AUDIO_ISBIGENDIAN(this->spec.format))
2043
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
533 strdesc.mFormatFlags |= kLinearPCMFormatFlagIsBigEndian;
935
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
534
3784
37c9c4590689 First batch of heavy lifting on supporting multiple audio devices at once.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
535 if (SDL_AUDIO_ISFLOAT(this->spec.format))
2043
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
536 strdesc.mFormatFlags |= kLinearPCMFormatFlagIsFloat;
3784
37c9c4590689 First batch of heavy lifting on supporting multiple audio devices at once.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
537 else if (SDL_AUDIO_ISSIGNED(this->spec.format))
2043
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
538 strdesc.mFormatFlags |= kLinearPCMFormatFlagIsSignedInteger;
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
539 break;
2003
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
540 }
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
541 }
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
542
2043
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
543 if (!valid_datatype) { /* shouldn't happen, but just in case... */
2003
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
544 SDL_SetError("Unsupported audio format");
3784
37c9c4590689 First batch of heavy lifting on supporting multiple audio devices at once.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
545 return 0;
2003
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
546 }
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
547
2016
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
548 strdesc.mBytesPerFrame =
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
549 strdesc.mBitsPerChannel * strdesc.mChannelsPerFrame / 8;
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
550 strdesc.mBytesPerPacket =
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
551 strdesc.mBytesPerFrame * strdesc.mFramesPerPacket;
935
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
552
3785
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
553 if (!prepare_audiounit(this, devname, iscapture, &strdesc)) {
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
554 return 0; /* prepare_audiounit() will call SDL_SetError()... */
935
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
555 }
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1487
diff changeset
556
3785
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
557 return 1; /* good to go. */
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1487
diff changeset
558 }
935
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
559
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1487
diff changeset
560 /* vi: set ts=4 sw=4 expandtab: */