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annotate src/audio/macosx/SDL_coreaudio.c @ 3787:8d74a4721ca9 SDL-ryan-multiple-audio-device

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Added deinitialize hook.
author Ryan C. Gordon <icculus@icculus.org>
date Tue, 03 Oct 2006 16:26:42 +0000
parents b70f4e9291bb
children 7006b176ef4f
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 static void COREAUDIO_Deinitialize(void);
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183
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184 /* Audio driver bootstrap functions */
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185
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186 static int
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187 COREAUDIO_Available(void)
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188 {
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189 return (1);
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190 }
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191
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192 static int
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193 COREAUDIO_Init(SDL_AudioDriverImpl *impl)
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194 {
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195 /* !!! FIXME: should these _really_ be static? */
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196 build_device_list(0, &outputDevices, &outputDeviceCount);
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197 build_device_list(1, &inputDevices, &inputDeviceCount);
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198
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199 /* Set the function pointers */
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200 impl->OpenAudio = COREAUDIO_OpenAudio;
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201 impl->WaitAudio = COREAUDIO_WaitAudio;
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202 impl->PlayAudio = COREAUDIO_PlayAudio;
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203 impl->GetAudioBuf = COREAUDIO_GetAudioBuf;
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204 impl->CloseAudio = COREAUDIO_CloseAudio;
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205 impl->Deinitialize = COREAUDIO_Deinitialize;
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206
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207 return 1;
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208 }
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209
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
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diff changeset
210 AudioBootStrap COREAUDIO_bootstrap = {
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211 "coreaudio", "Mac OS X CoreAudio",
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diff changeset
212 COREAUDIO_Available, COREAUDIO_Init
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213 };
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214
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215
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diff changeset
216 static void
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217 COREAUDIO_Deinitialize(void)
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218 {
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219 free_device_list(0, &outputDevices, &outputDeviceCount);
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220 free_device_list(1, &inputDevices, &inputDeviceCount);
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221 }
8d74a4721ca9 Added deinitialize hook.
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diff changeset
222
8d74a4721ca9 Added deinitialize hook.
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223
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224 /* The CoreAudio callback */
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225 static OSStatus
3785
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226 outputCallback(void *inRefCon,
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227 AudioUnitRenderActionFlags *ioActionFlags,
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228 const AudioTimeStamp * inTimeStamp,
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diff changeset
229 UInt32 inBusNumber, UInt32 inNumberFrames,
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diff changeset
230 AudioBufferList *ioDataList)
935
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diff changeset
231 {
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diff changeset
232 SDL_AudioDevice *this = (SDL_AudioDevice *) inRefCon;
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diff changeset
233 AudioBuffer *ioData = &ioDataList->mBuffers[0];
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234 UInt32 remaining, len;
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diff changeset
235 void *ptr;
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diff changeset
236
3786
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diff changeset
237 /*
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238 * !!! FIXME: I'm not sure if you can ever have more than one
b70f4e9291bb High level now lets user select a specific audio device with an environment
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diff changeset
239 * buffer, or what this signifies, or what to do with it...
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diff changeset
240 */
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diff changeset
241 if (ioDataList->mNumberBuffers != 1) {
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242 return noErr;
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diff changeset
243 }
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244
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245 /* Only do anything if audio is enabled and not paused */
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diff changeset
246 if (!this->enabled || this->paused) {
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
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parents: 1312
diff changeset
247 SDL_memset(ioData->mData, this->spec.silence, ioData->mDataByteSize);
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248 return 0;
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249 }
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diff changeset
250
935
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251 /* No SDL conversion should be needed here, ever, since we accept
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252 any input format in OpenAudio, and leave the conversion to CoreAudio.
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diff changeset
253 */
1338
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diff changeset
254 /*
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diff changeset
255 assert(!this->convert.needed);
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diff changeset
256 assert(this->spec.channels == ioData->mNumberChannels);
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diff changeset
257 */
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258
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259 remaining = ioData->mDataByteSize;
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260 ptr = ioData->mData;
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261 while (remaining > 0) {
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262 if (this->hidden->bufferOffset >= this->hidden->bufferSize) {
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263 /* Generate the data */
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264 SDL_memset(this->hidden->buffer, this->spec.silence,
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265 this->hidden->bufferSize);
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266 SDL_mutexP(this->mixer_lock);
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267 (*this->spec.callback) (this->spec.userdata, this->hidden->buffer,
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268 this->hidden->bufferSize);
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269 SDL_mutexV(this->mixer_lock);
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270 this->hidden->bufferOffset = 0;
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271 }
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272
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273 len = this->hidden->bufferSize - this->hidden->bufferOffset;
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274 if (len > remaining)
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275 len = remaining;
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276 SDL_memcpy(ptr,
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277 (char *) this->hidden->buffer + this->hidden->bufferOffset,
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278 len);
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279 ptr = (char *) ptr + len;
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280 remaining -= len;
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281 this->hidden->bufferOffset += len;
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282 }
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283
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284 return 0;
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285 }
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286
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287 static OSStatus
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288 inputCallback(void *inRefCon,
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289 AudioUnitRenderActionFlags *ioActionFlags,
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290 const AudioTimeStamp * inTimeStamp,
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291 UInt32 inBusNumber, UInt32 inNumberFrames,
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292 AudioBufferList *ioData)
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293 {
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294 //err = AudioUnitRender(afr->fAudioUnit, ioActionFlags, inTimeStamp, inBusNumber, inNumberFrames, afr->fAudioBuffer);
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295 // !!! FIXME: write me!
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296 return noErr;
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297 }
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298
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299
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300 /* Dummy functions -- we don't use thread-based audio */
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301 void
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302 COREAUDIO_WaitAudio(_THIS)
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303 {
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304 return;
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305 }
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306
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307 void
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308 COREAUDIO_PlayAudio(_THIS)
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309 {
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310 return;
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311 }
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312
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313 Uint8 *
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314 COREAUDIO_GetAudioBuf(_THIS)
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315 {
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316 return (NULL);
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317 }
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318
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319 void
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320 COREAUDIO_CloseAudio(_THIS)
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321 {
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322 if (this->hidden != NULL) {
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323 OSStatus result = noErr;
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324 AURenderCallbackStruct callback;
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325 const AudioUnitElement output_bus = 0;
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326 const AudioUnitElement input_bus = 1;
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327 const int iscapture = this->hidden->isCapture;
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328 const AudioUnitElement bus = ((iscapture) ? input_bus : output_bus);
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329 const AudioUnitScope scope = ((iscapture) ? kAudioUnitScope_Output :
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330 kAudioUnitScope_Input);
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331
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332 /* stop processing the audio unit */
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333 result = AudioOutputUnitStop(this->hidden->audioUnit);
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334
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335 /* Remove the input callback */
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336 memset(&callback, '\0', sizeof (AURenderCallbackStruct));
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337 result = AudioUnitSetProperty(this->hidden->audioUnit,
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338 kAudioUnitProperty_SetRenderCallback,
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339 scope, bus, &callback, sizeof (callback));
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340
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341 CloseComponent(this->hidden->audioUnit);
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342
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343 SDL_free(this->hidden->buffer);
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344 SDL_free(this->hidden);
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345 this->hidden = NULL;
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346 }
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347 }
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348
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349
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350 #define CHECK_RESULT(msg) \
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351 if (result != noErr) { \
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352 COREAUDIO_CloseAudio(this); \
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353 SDL_SetError("CoreAudio error (%s): %d", msg, (int) result); \
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354 return 0; \
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355 }
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356
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357 static int
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358 find_device_by_name(_THIS, const char *devname, int iscapture)
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359 {
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360 AudioDeviceID devid = 0;
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361 OSStatus result = noErr;
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362 UInt32 size = 0;
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363 UInt32 alive = 0;
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364 pid_t pid = 0;
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365
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366 if (devname == NULL) {
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367 size = sizeof (AudioDeviceID);
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368 const AudioHardwarePropertyID propid =
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369 ((iscapture) ? kAudioHardwarePropertyDefaultInputDevice :
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370 kAudioHardwarePropertyDefaultOutputDevice);
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371
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372 result = AudioHardwareGetProperty(propid, &size, &devid);
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373 CHECK_RESULT("AudioHardwareGetProperty (default device)");
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374 } else {
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375 if (!find_device_id(devname, iscapture, &devid)) {
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376 SDL_SetError("CoreAudio: No such audio device.");
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377 return 0;
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378 }
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379 }
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diff changeset
380
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381 size = sizeof (alive);
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382 result = AudioDeviceGetProperty(devid, 0, iscapture,
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383 kAudioDevicePropertyDeviceIsAlive,
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diff changeset
384 &size, &alive);
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385 CHECK_RESULT("AudioDeviceGetProperty (kAudioDevicePropertyDeviceIsAlive)");
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386
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387 if (!alive) {
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388 SDL_SetError("CoreAudio: requested device exists, but isn't alive.");
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diff changeset
389 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
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 size = sizeof (pid);
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 result = AudioDeviceGetProperty(devid, 0, 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
394 kAudioDevicePropertyHogMode, &size, &pid);
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
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 /* some devices don't support this property, so errors are fine here. */
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 if ((result == noErr) && (pid != -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
398 SDL_SetError("CoreAudio: requested device is being hogged.");
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 return 0;
935
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
400 }
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
401
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
402 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
403 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
404 }
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
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
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 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
408 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
409 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
410 {
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 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
412 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
413 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
414 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
415 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
416 UInt32 enableIO = 0;
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Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
417 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
418 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
419 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
420 const AudioUnitScope scope = ((iscapture) ? kAudioUnitScope_Output :
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Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
421 kAudioUnitScope_Input);
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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 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
424 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
425 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
426 }
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 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
429 desc.componentType = kAudioUnitType_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
430 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
431 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
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 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
434 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
435 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
436 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
437 }
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
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 /* 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
440 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
441 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
442
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 // !!! 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
444 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
445 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
446 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
447 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
448 &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
449 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
450
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 // !!! 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
452 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
453 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
454 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
455 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
456 &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
457 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
458
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 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
460 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
461 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
462 &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
463 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
464 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
465
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 /* 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
467 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
468 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
469 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
470 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
471
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 /* 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
473 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
474 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
475 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
476 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
477 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
478 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
479 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
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 /* 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
482 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
483
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 /* 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
485 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
486 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
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 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
489 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
490
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
491 /* 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
492 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
493 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
494
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
495 /* 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
496 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
497 }
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
498
935
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
499
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
500 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
501 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
502 {
2016
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
503 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
504 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
505 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
506
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 /* 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
508 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
509 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
510 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
511 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
512 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
513 }
37c9c4590689 First batch of heavy lifting on supporting multiple audio devices at once.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
514 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
515
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
516 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
517
935
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
518 /* Setup a AudioStreamBasicDescription with the requested format */
2043
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
519 memset(&strdesc, '\0', sizeof(AudioStreamBasicDescription));
2016
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
520 strdesc.mFormatID = kAudioFormatLinearPCM;
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
521 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
522 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
523 strdesc.mSampleRate = this->spec.freq;
2016
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
524 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
525
2003
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
526 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
527 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
528 /* 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
529 switch (test_format) {
2043
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
530 case AUDIO_U8:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
531 case AUDIO_S8:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
532 case AUDIO_U16LSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
533 case AUDIO_S16LSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
534 case AUDIO_U16MSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
535 case AUDIO_S16MSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
536 case AUDIO_S32LSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
537 case AUDIO_S32MSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
538 case AUDIO_F32LSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
539 case AUDIO_F32MSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
540 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
541 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
542 if (SDL_AUDIO_ISBIGENDIAN(this->spec.format))
2043
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
543 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
544
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 if (SDL_AUDIO_ISFLOAT(this->spec.format))
2043
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
546 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
547 else if (SDL_AUDIO_ISSIGNED(this->spec.format))
2043
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
548 strdesc.mFormatFlags |= kLinearPCMFormatFlagIsSignedInteger;
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
549 break;
2003
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
550 }
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
551 }
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
552
2043
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
553 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
554 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
555 return 0;
2003
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
556 }
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
557
2016
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
558 strdesc.mBytesPerFrame =
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
559 strdesc.mBitsPerChannel * strdesc.mChannelsPerFrame / 8;
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
560 strdesc.mBytesPerPacket =
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
561 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
562
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
563 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
564 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
565 }
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
566
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
567 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
568 }
935
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
569
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
570 /* vi: set ts=4 sw=4 expandtab: */