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annotate src/audio/macosx/SDL_coreaudio.c @ 2191:29e07f91bc1f

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Rename LockAudio,UnlockAudio to LockDevice,UnlockDevice. Also some small fixes
author Patrice Mandin <patmandin@gmail.com>
date Fri, 13 Jul 2007 23:58:22 +0000
parents 21942f552734
children 6359f74f3170
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 #define DEBUG_COREAUDIO 0
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33
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34 typedef struct COREAUDIO_DeviceList
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35 {
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36 AudioDeviceID id;
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37 const char *name;
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38 } COREAUDIO_DeviceList;
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39
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40 static COREAUDIO_DeviceList *inputDevices = NULL;
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41 static int inputDeviceCount = 0;
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42 static COREAUDIO_DeviceList *outputDevices = NULL;
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43 static int outputDeviceCount = 0;
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44
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45 static void
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46 free_device_list(COREAUDIO_DeviceList ** devices, int *devCount)
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47 {
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48 if (*devices) {
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49 int i = *devCount;
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50 while (i--)
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51 SDL_free((void *) (*devices)[i].name);
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52 SDL_free(*devices);
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53 *devices = NULL;
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54 }
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55 *devCount = 0;
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56 }
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57
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58
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59 static void
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60 build_device_list(int iscapture, COREAUDIO_DeviceList ** devices,
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61 int *devCount)
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62 {
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63 Boolean outWritable = 0;
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64 OSStatus result = noErr;
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65 UInt32 size = 0;
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66 AudioDeviceID *devs = NULL;
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67 UInt32 i = 0;
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68 UInt32 max = 0;
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69
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70 free_device_list(devices, devCount);
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71
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72 result = AudioHardwareGetPropertyInfo(kAudioHardwarePropertyDevices,
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73 &size, &outWritable);
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74
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75 if (result != kAudioHardwareNoError)
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76 return;
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77
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78 devs = (AudioDeviceID *) alloca(size);
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79 if (devs == NULL)
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80 return;
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81
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82 max = size / sizeof(AudioDeviceID);
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83 *devices = (COREAUDIO_DeviceList *) SDL_malloc(max * sizeof(**devices));
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84 if (*devices == NULL)
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85 return;
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86
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87 result = AudioHardwareGetProperty(kAudioHardwarePropertyDevices,
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88 &size, devs);
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89 if (result != kAudioHardwareNoError)
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90 return;
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91
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92 for (i = 0; i < max; i++) {
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93 CFStringRef cfstr = NULL;
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94 char *ptr = NULL;
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95 AudioDeviceID dev = devs[i];
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96 AudioBufferList *buflist = NULL;
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97 int usable = 0;
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98 CFIndex len = 0;
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99
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100 result = AudioDeviceGetPropertyInfo(dev, 0, iscapture,
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101 kAudioDevicePropertyStreamConfiguration,
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102 &size, &outWritable);
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103 if (result != noErr)
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104 continue;
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105
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106 buflist = (AudioBufferList *) SDL_malloc(size);
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107 if (buflist == NULL)
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108 continue;
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109
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110 result = AudioDeviceGetProperty(dev, 0, iscapture,
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111 kAudioDevicePropertyStreamConfiguration,
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112 &size, buflist);
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113
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114 if (result == noErr) {
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115 UInt32 j;
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116 for (j = 0; j < buflist->mNumberBuffers; j++) {
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117 if (buflist->mBuffers[j].mNumberChannels > 0) {
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118 usable = 1;
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119 break;
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120 }
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121 }
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122 }
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123
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124 SDL_free(buflist);
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125
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126 if (!usable)
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127 continue;
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128
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129 size = sizeof(CFStringRef);
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130 result = AudioDeviceGetProperty(dev, 0, iscapture,
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131 kAudioDevicePropertyDeviceNameCFString,
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132 &size, &cfstr);
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133
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134 if (result != kAudioHardwareNoError)
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135 continue;
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136
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137 len = CFStringGetMaximumSizeForEncoding(CFStringGetLength(cfstr),
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138 kCFStringEncodingUTF8);
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139
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140 ptr = (char *) SDL_malloc(len + 1);
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141 usable = ((ptr != NULL) &&
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142 (CFStringGetCString
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143 (cfstr, ptr, len + 1, kCFStringEncodingUTF8)));
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144
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145 CFRelease(cfstr);
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146
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147 if (usable) {
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148 len = strlen(ptr);
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149 /* Some devices have whitespace at the end...trim it. */
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150 while ((len > 0) && (ptr[len - 1] == ' ')) {
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151 len--;
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152 }
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153 usable = (len > 0);
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154 }
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155
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156 if (!usable) {
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157 SDL_free(ptr);
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158 } else {
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159 ptr[len] = '\0';
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160
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161 #if DEBUG_COREAUDIO
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162 printf("COREAUDIO: Found %s device #%d: '%s' (devid %d)\n",
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163 ((iscapture) ? "capture" : "output"),
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164 (int) *devCount, ptr, (int) dev);
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165 #endif
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166
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167 (*devices)[*devCount].id = dev;
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168 (*devices)[*devCount].name = ptr;
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169 (*devCount)++;
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170 }
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171 }
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172 }
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173
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174 static inline void
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175 build_device_lists(void)
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176 {
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177 build_device_list(0, &outputDevices, &outputDeviceCount);
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178 build_device_list(1, &inputDevices, &inputDeviceCount);
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179 }
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180
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181
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182 static inline void
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183 free_device_lists(void)
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184 {
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185 free_device_list(&outputDevices, &outputDeviceCount);
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186 free_device_list(&inputDevices, &inputDeviceCount);
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187 }
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188
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189
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190 static int
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191 find_device_id(const char *devname, int iscapture, AudioDeviceID * id)
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192 {
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193 int i = ((iscapture) ? inputDeviceCount : outputDeviceCount);
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194 COREAUDIO_DeviceList *devs = ((iscapture) ? inputDevices : outputDevices);
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195 while (i--) {
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196 if (SDL_strcmp(devname, devs->name) == 0) {
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197 *id = devs->id;
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198 return 1;
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199 }
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200 devs++;
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201 }
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202
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203 return 0;
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204 }
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205
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206
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207 static int
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208 COREAUDIO_DetectDevices(int iscapture)
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209 {
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210 if (iscapture) {
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211 build_device_list(1, &inputDevices, &inputDeviceCount);
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212 return inputDeviceCount;
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213 } else {
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214 build_device_list(0, &outputDevices, &outputDeviceCount);
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215 return outputDeviceCount;
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216 }
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217
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218 return 0; /* shouldn't ever hit this. */
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219 }
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220
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221
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222 static const char *
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223 COREAUDIO_GetDeviceName(int index, int iscapture)
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224 {
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225 if ((iscapture) && (index < inputDeviceCount)) {
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226 return inputDevices[index].name;
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227 } else if ((!iscapture) && (index < outputDeviceCount)) {
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228 return outputDevices[index].name;
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229 }
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230
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231 SDL_SetError("No such device");
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232 return NULL;
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233 }
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234
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235
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236 static void
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237 COREAUDIO_Deinitialize(void)
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238 {
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239 free_device_lists();
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240 }
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241
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242
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243 /* The CoreAudio callback */
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244 static OSStatus
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245 outputCallback(void *inRefCon,
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246 AudioUnitRenderActionFlags * ioActionFlags,
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247 const AudioTimeStamp * inTimeStamp,
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248 UInt32 inBusNumber, UInt32 inNumberFrames,
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249 AudioBufferList * ioDataList)
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250 {
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251 SDL_AudioDevice *this = (SDL_AudioDevice *) inRefCon;
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252 AudioBuffer *ioData = &ioDataList->mBuffers[0];
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253 UInt32 remaining, len;
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254 void *ptr;
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255
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256 /* Is there ever more than one buffer, and what do you do with it? */
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257 if (ioDataList->mNumberBuffers != 1) {
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258 return noErr;
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259 }
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260
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261 /* Only do anything if audio is enabled and not paused */
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262 if (!this->enabled || this->paused) {
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263 SDL_memset(ioData->mData, this->spec.silence, ioData->mDataByteSize);
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264 return 0;
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265 }
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266
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267 /* No SDL conversion should be needed here, ever, since we accept
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268 any input format in OpenAudio, and leave the conversion to CoreAudio.
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269 */
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270 /*
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271 assert(!this->convert.needed);
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272 assert(this->spec.channels == ioData->mNumberChannels);
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273 */
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274
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275 remaining = ioData->mDataByteSize;
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276 ptr = ioData->mData;
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277 while (remaining > 0) {
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278 if (this->hidden->bufferOffset >= this->hidden->bufferSize) {
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279 /* Generate the data */
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280 SDL_memset(this->hidden->buffer, this->spec.silence,
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281 this->hidden->bufferSize);
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282 SDL_mutexP(this->mixer_lock);
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283 (*this->spec.callback) (this->spec.userdata, this->hidden->buffer,
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284 this->hidden->bufferSize);
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285 SDL_mutexV(this->mixer_lock);
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286 this->hidden->bufferOffset = 0;
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287 }
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288
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289 len = this->hidden->bufferSize - this->hidden->bufferOffset;
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290 if (len > remaining)
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291 len = remaining;
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292 SDL_memcpy(ptr,
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293 (char *) this->hidden->buffer + this->hidden->bufferOffset,
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294 len);
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295 ptr = (char *) ptr + len;
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296 remaining -= len;
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297 this->hidden->bufferOffset += len;
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298 }
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299
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300 return 0;
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301 }
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302
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303 static OSStatus
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304 inputCallback(void *inRefCon,
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305 AudioUnitRenderActionFlags * ioActionFlags,
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306 const AudioTimeStamp * inTimeStamp,
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307 UInt32 inBusNumber, UInt32 inNumberFrames,
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308 AudioBufferList * ioData)
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309 {
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310 //err = AudioUnitRender(afr->fAudioUnit, ioActionFlags, inTimeStamp, inBusNumber, inNumberFrames, afr->fAudioBuffer);
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311 // !!! FIXME: write me!
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312 return noErr;
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313 }
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314
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315
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316 static void
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317 COREAUDIO_CloseDevice(_THIS)
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318 {
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319 if (this->hidden != NULL) {
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320 if (this->hidden->audioUnitOpened) {
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321 OSStatus result = noErr;
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322 AURenderCallbackStruct callback;
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323 const AudioUnitElement output_bus = 0;
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324 const AudioUnitElement input_bus = 1;
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325 const int iscapture = this->iscapture;
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326 const AudioUnitElement bus =
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327 ((iscapture) ? input_bus : output_bus);
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328 const AudioUnitScope scope =
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329 ((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 SDL_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,
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340 sizeof(callback));
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341
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342 CloseComponent(this->hidden->audioUnit);
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343 this->hidden->audioUnitOpened = 0;
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344 }
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345 SDL_free(this->hidden->buffer);
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346 SDL_free(this->hidden);
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347 this->hidden = NULL;
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348 }
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349 }
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350
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351
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352 #define CHECK_RESULT(msg) \
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353 if (result != noErr) { \
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354 COREAUDIO_CloseDevice(this); \
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355 SDL_SetError("CoreAudio error (%s): %d", msg, (int) result); \
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356 return 0; \
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357 }
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358
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359 static int
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360 find_device_by_name(_THIS, const char *devname, int iscapture)
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361 {
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362 AudioDeviceID devid = 0;
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363 OSStatus result = noErr;
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364 UInt32 size = 0;
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365 UInt32 alive = 0;
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366 pid_t pid = 0;
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367
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368 if (devname == NULL) {
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369 size = sizeof(AudioDeviceID);
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370 const AudioHardwarePropertyID propid =
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371 ((iscapture) ? kAudioHardwarePropertyDefaultInputDevice :
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372 kAudioHardwarePropertyDefaultOutputDevice);
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373
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374 result = AudioHardwareGetProperty(propid, &size, &devid);
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375 CHECK_RESULT("AudioHardwareGetProperty (default device)");
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376 } else {
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377 if (!find_device_id(devname, iscapture, &devid)) {
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378 SDL_SetError("CoreAudio: No such audio device.");
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379 return 0;
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380 }
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381 }
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382
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383 size = sizeof(alive);
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384 result = AudioDeviceGetProperty(devid, 0, iscapture,
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385 kAudioDevicePropertyDeviceIsAlive,
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386 &size, &alive);
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387 CHECK_RESULT
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388 ("AudioDeviceGetProperty (kAudioDevicePropertyDeviceIsAlive)");
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389
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390 if (!alive) {
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391 SDL_SetError("CoreAudio: requested device exists, but isn't alive.");
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392 return 0;
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393 }
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394
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395 size = sizeof(pid);
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396 result = AudioDeviceGetProperty(devid, 0, iscapture,
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397 kAudioDevicePropertyHogMode, &size, &pid);
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398
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399 /* some devices don't support this property, so errors are fine here. */
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400 if ((result == noErr) && (pid != -1)) {
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401 SDL_SetError("CoreAudio: requested device is being hogged.");
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402 return 0;
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403 }
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404
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405 this->hidden->deviceID = devid;
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406 return 1;
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407 }
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408
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409
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diff changeset
410 static int
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411 prepare_audiounit(_THIS, const char *devname, int iscapture,
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412 const AudioStreamBasicDescription * strdesc)
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413 {
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414 OSStatus result = noErr;
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415 AURenderCallbackStruct callback;
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416 ComponentDescription desc;
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417 Component comp = NULL;
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418 int use_system_device = 0;
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419 UInt32 enableIO = 0;
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420 const AudioUnitElement output_bus = 0;
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421 const AudioUnitElement input_bus = 1;
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422 const AudioUnitElement bus = ((iscapture) ? input_bus : output_bus);
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423 const AudioUnitScope scope = ((iscapture) ? kAudioUnitScope_Output :
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424 kAudioUnitScope_Input);
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425
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426 if (!find_device_by_name(this, devname, iscapture)) {
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427 SDL_SetError("Couldn't find requested CoreAudio device");
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428 return 0;
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429 }
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430
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431 SDL_memset(&desc, '\0', sizeof(ComponentDescription));
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432 desc.componentType = kAudioUnitType_Output;
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433 desc.componentSubType = kAudioUnitSubType_HALOutput;
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434 desc.componentManufacturer = kAudioUnitManufacturer_Apple;
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435
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436 comp = FindNextComponent(NULL, &desc);
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437 if (comp == NULL) {
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438 SDL_SetError("Couldn't find requested CoreAudio component");
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439 return 0;
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440 }
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441
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442 /* Open & initialize the audio unit */
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443 result = OpenAComponent(comp, &this->hidden->audioUnit);
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444 CHECK_RESULT("OpenAComponent");
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diff changeset
445
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446 this->hidden->audioUnitOpened = 1;
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447
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448 // !!! FIXME: this is wrong?
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449 enableIO = ((iscapture) ? 1 : 0);
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450 result = AudioUnitSetProperty(this->hidden->audioUnit,
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451 kAudioOutputUnitProperty_EnableIO,
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452 kAudioUnitScope_Input, input_bus,
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453 &enableIO, sizeof(enableIO));
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454 CHECK_RESULT("AudioUnitSetProperty (kAudioUnitProperty_EnableIO input)");
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455
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456 // !!! FIXME: this is wrong?
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457 enableIO = ((iscapture) ? 0 : 1);
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458 result = AudioUnitSetProperty(this->hidden->audioUnit,
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diff changeset
459 kAudioOutputUnitProperty_EnableIO,
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diff changeset
460 kAudioUnitScope_Output, output_bus,
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461 &enableIO, sizeof(enableIO));
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462 CHECK_RESULT("AudioUnitSetProperty (kAudioUnitProperty_EnableIO output)");
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463
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diff changeset
464 result = AudioUnitSetProperty(this->hidden->audioUnit,
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465 kAudioOutputUnitProperty_CurrentDevice,
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diff changeset
466 kAudioUnitScope_Global, 0,
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467 &this->hidden->deviceID,
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468 sizeof(AudioDeviceID));
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diff changeset
469 CHECK_RESULT
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470 ("AudioUnitSetProperty (kAudioOutputUnitProperty_CurrentDevice)");
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471
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diff changeset
472 /* Set the data format of the audio unit. */
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473 result = AudioUnitSetProperty(this->hidden->audioUnit,
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diff changeset
474 kAudioUnitProperty_StreamFormat,
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475 scope, bus, strdesc, sizeof(*strdesc));
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476 CHECK_RESULT("AudioUnitSetProperty (kAudioUnitProperty_StreamFormat)");
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diff changeset
477
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diff changeset
478 /* Set the audio callback */
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479 SDL_memset(&callback, '\0', sizeof(AURenderCallbackStruct));
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diff changeset
480 callback.inputProc = ((iscapture) ? inputCallback : outputCallback);
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diff changeset
481 callback.inputProcRefCon = this;
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diff changeset
482 result = AudioUnitSetProperty(this->hidden->audioUnit,
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diff changeset
483 kAudioUnitProperty_SetRenderCallback,
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diff changeset
484 scope, bus, &callback, sizeof(callback));
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485 CHECK_RESULT
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diff changeset
486 ("AudioUnitSetProperty (kAudioUnitProperty_SetInputCallback)");
2049
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487
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diff changeset
488 /* Calculate the final parameters for this audio specification */
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diff changeset
489 SDL_CalculateAudioSpec(&this->spec);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
490
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
491 /* Allocate a sample buffer */
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
492 this->hidden->bufferOffset = this->hidden->bufferSize = this->spec.size;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents: 2043
diff changeset
493 this->hidden->buffer = SDL_malloc(this->hidden->bufferSize);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents: 2043
diff changeset
494
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
495 result = AudioUnitInitialize(this->hidden->audioUnit);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
496 CHECK_RESULT("AudioUnitInitialize");
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
497
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
498 /* Finally, start processing of the audio unit */
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents: 2043
diff changeset
499 result = AudioOutputUnitStart(this->hidden->audioUnit);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
500 CHECK_RESULT("AudioOutputUnitStart");
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
501
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
502 /* We're running! */
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diff changeset
503 return 1;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
504 }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
505
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
506
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
507 static int
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
508 COREAUDIO_OpenDevice(_THIS, const char *devname, int iscapture)
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
509 {
2016
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
510 AudioStreamBasicDescription strdesc;
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
511 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
512 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
513
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
514 /* Initialize all variables that we clean on shutdown */
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
515 this->hidden = (struct SDL_PrivateAudioData *)
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
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diff changeset
516 SDL_malloc((sizeof *this->hidden));
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
517 if (this->hidden == NULL) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
518 SDL_OutOfMemory();
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
519 return (0);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
520 }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
521 SDL_memset(this->hidden, 0, (sizeof *this->hidden));
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
522
935
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
523 /* Setup a AudioStreamBasicDescription with the requested format */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
524 SDL_memset(&strdesc, '\0', sizeof(AudioStreamBasicDescription));
2016
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
525 strdesc.mFormatID = kAudioFormatLinearPCM;
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
526 strdesc.mFormatFlags = kLinearPCMFormatFlagIsPacked;
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
527 strdesc.mChannelsPerFrame = this->spec.channels;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
528 strdesc.mSampleRate = this->spec.freq;
2016
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
529 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
530
2003
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
531 while ((!valid_datatype) && (test_format)) {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
532 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
533 /* 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
534 switch (test_format) {
2043
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
535 case AUDIO_U8:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
536 case AUDIO_S8:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
537 case AUDIO_U16LSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
538 case AUDIO_S16LSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
539 case AUDIO_U16MSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
540 case AUDIO_S16MSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
541 case AUDIO_S32LSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
542 case AUDIO_S32MSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
543 case AUDIO_F32LSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
544 case AUDIO_F32MSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
545 valid_datatype = 1;
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
546 strdesc.mBitsPerChannel = SDL_AUDIO_BITSIZE(this->spec.format);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
547 if (SDL_AUDIO_ISBIGENDIAN(this->spec.format))
2043
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
548 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
549
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
550 if (SDL_AUDIO_ISFLOAT(this->spec.format))
2043
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
551 strdesc.mFormatFlags |= kLinearPCMFormatFlagIsFloat;
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
552 else if (SDL_AUDIO_ISSIGNED(this->spec.format))
2043
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
553 strdesc.mFormatFlags |= kLinearPCMFormatFlagIsSignedInteger;
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
554 break;
2003
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
555 }
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
2043
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
558 if (!valid_datatype) { /* shouldn't happen, but just in case... */
2055
72cc2226d6a3 Fix potential memory leaks if CoreAudio initialization fails.
Ryan C. Gordon <icculus@icculus.org>
parents: 2049
diff changeset
559 COREAUDIO_CloseDevice(this);
2003
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
560 SDL_SetError("Unsupported audio format");
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
561 return 0;
2003
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
562 }
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
563
2016
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
564 strdesc.mBytesPerFrame =
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
565 strdesc.mBitsPerChannel * strdesc.mChannelsPerFrame / 8;
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
566 strdesc.mBytesPerPacket =
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
567 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
568
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
569 if (!prepare_audiounit(this, devname, iscapture, &strdesc)) {
2057
c2fed8bb6700 Oh for crying out loud...
Ryan C. Gordon <icculus@icculus.org>
parents: 2055
diff changeset
570 COREAUDIO_CloseDevice(this);
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2057
diff changeset
571 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
572 }
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
573
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2057
diff changeset
574 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
575 }
935
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
576
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
577 static int
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2057
diff changeset
578 COREAUDIO_Init(SDL_AudioDriverImpl * impl)
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
579 {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
580 /* Set the function pointers */
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
581 impl->DetectDevices = COREAUDIO_DetectDevices;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
582 impl->GetDeviceName = COREAUDIO_GetDeviceName;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
583 impl->OpenDevice = COREAUDIO_OpenDevice;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
584 impl->CloseDevice = COREAUDIO_CloseDevice;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
585 impl->Deinitialize = COREAUDIO_Deinitialize;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
586 impl->ProvidesOwnCallbackThread = 1;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
587
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2057
diff changeset
588 build_device_lists(); /* do an initial check for devices... */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
589
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
590 return 1;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
591 }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
592
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
593 AudioBootStrap COREAUDIO_bootstrap = {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
594 "coreaudio", "Mac OS X CoreAudio", COREAUDIO_Init, 0
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
595 };
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
596
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
597 /* vi: set ts=4 sw=4 expandtab: */