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annotate src/audio/macosx/SDL_coreaudio.c @ 4763:518d1679d2d0

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Merged Daniel's Google Summer of Code work from SDL-gsoc2010_IME
author Sam Lantinga <slouken@libsdl.org>
date Sun, 22 Aug 2010 12:39:27 -0700
parents 4160ba33b597
children 514f811a4887
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2010 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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24 #include <CoreAudio/CoreAudio.h>
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25 #include <CoreServices/CoreServices.h>
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26 #include <AudioUnit/AudioUnit.h>
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27 #if MAC_OS_X_VERSION_MAX_ALLOWED <= 1050
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28 #include <AudioUnit/AUNTComponent.h>
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29 #endif
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30
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31 #include "SDL_audio.h"
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32 #include "../SDL_audio_c.h"
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33 #include "../SDL_sysaudio.h"
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34 #include "SDL_coreaudio.h"
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35
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36 #define DEBUG_COREAUDIO 0
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37
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38 typedef struct COREAUDIO_DeviceList
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39 {
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40 AudioDeviceID id;
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41 const char *name;
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42 } COREAUDIO_DeviceList;
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43
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44 static COREAUDIO_DeviceList *inputDevices = NULL;
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45 static int inputDeviceCount = 0;
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46 static COREAUDIO_DeviceList *outputDevices = NULL;
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47 static int outputDeviceCount = 0;
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48
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49 static void
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50 free_device_list(COREAUDIO_DeviceList ** devices, int *devCount)
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51 {
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52 if (*devices) {
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53 int i = *devCount;
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54 while (i--)
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55 SDL_free((void *) (*devices)[i].name);
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56 SDL_free(*devices);
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57 *devices = NULL;
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58 }
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59 *devCount = 0;
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60 }
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61
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62
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63 static void
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64 build_device_list(int iscapture, COREAUDIO_DeviceList ** devices,
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65 int *devCount)
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66 {
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67 Boolean outWritable = 0;
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68 OSStatus result = noErr;
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69 UInt32 size = 0;
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70 AudioDeviceID *devs = NULL;
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71 UInt32 i = 0;
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72 UInt32 max = 0;
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73
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74 free_device_list(devices, devCount);
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75
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76 result = AudioHardwareGetPropertyInfo(kAudioHardwarePropertyDevices,
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77 &size, &outWritable);
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78
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79 if (result != kAudioHardwareNoError)
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80 return;
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81
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82 devs = (AudioDeviceID *) alloca(size);
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83 if (devs == NULL)
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84 return;
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85
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86 max = size / sizeof(AudioDeviceID);
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87 *devices = (COREAUDIO_DeviceList *) SDL_malloc(max * sizeof(**devices));
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88 if (*devices == NULL)
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89 return;
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90
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91 result = AudioHardwareGetProperty(kAudioHardwarePropertyDevices,
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92 &size, devs);
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93 if (result != kAudioHardwareNoError)
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94 return;
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95
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96 for (i = 0; i < max; i++) {
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97 CFStringRef cfstr = NULL;
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98 char *ptr = NULL;
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99 AudioDeviceID dev = devs[i];
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100 AudioBufferList *buflist = NULL;
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101 int usable = 0;
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102 CFIndex len = 0;
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103
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104 result = AudioDeviceGetPropertyInfo(dev, 0, iscapture,
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105 kAudioDevicePropertyStreamConfiguration,
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106 &size, &outWritable);
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107 if (result != noErr)
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108 continue;
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109
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110 buflist = (AudioBufferList *) SDL_malloc(size);
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111 if (buflist == NULL)
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112 continue;
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113
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114 result = AudioDeviceGetProperty(dev, 0, iscapture,
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115 kAudioDevicePropertyStreamConfiguration,
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116 &size, buflist);
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117
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118 if (result == noErr) {
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119 UInt32 j;
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120 for (j = 0; j < buflist->mNumberBuffers; j++) {
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121 if (buflist->mBuffers[j].mNumberChannels > 0) {
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122 usable = 1;
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123 break;
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124 }
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125 }
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126 }
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127
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128 SDL_free(buflist);
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129
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130 if (!usable)
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131 continue;
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132
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133 size = sizeof(CFStringRef);
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134 result = AudioDeviceGetProperty(dev, 0, iscapture,
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135 kAudioDevicePropertyDeviceNameCFString,
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136 &size, &cfstr);
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137
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138 if (result != kAudioHardwareNoError)
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139 continue;
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140
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141 len = CFStringGetMaximumSizeForEncoding(CFStringGetLength(cfstr),
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142 kCFStringEncodingUTF8);
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143
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144 ptr = (char *) SDL_malloc(len + 1);
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145 usable = ((ptr != NULL) &&
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146 (CFStringGetCString
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147 (cfstr, ptr, len + 1, kCFStringEncodingUTF8)));
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148
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149 CFRelease(cfstr);
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150
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151 if (usable) {
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152 len = strlen(ptr);
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153 /* Some devices have whitespace at the end...trim it. */
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154 while ((len > 0) && (ptr[len - 1] == ' ')) {
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155 len--;
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156 }
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157 usable = (len > 0);
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158 }
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159
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160 if (!usable) {
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161 SDL_free(ptr);
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162 } else {
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163 ptr[len] = '\0';
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164
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165 #if DEBUG_COREAUDIO
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166 printf("COREAUDIO: Found %s device #%d: '%s' (devid %d)\n",
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167 ((iscapture) ? "capture" : "output"),
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168 (int) *devCount, ptr, (int) dev);
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169 #endif
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170
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171 (*devices)[*devCount].id = dev;
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172 (*devices)[*devCount].name = ptr;
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173 (*devCount)++;
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174 }
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175 }
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176 }
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177
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178 static inline void
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179 build_device_lists(void)
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180 {
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181 build_device_list(0, &outputDevices, &outputDeviceCount);
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182 build_device_list(1, &inputDevices, &inputDeviceCount);
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183 }
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184
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185
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186 static inline void
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187 free_device_lists(void)
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188 {
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189 free_device_list(&outputDevices, &outputDeviceCount);
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190 free_device_list(&inputDevices, &inputDeviceCount);
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191 }
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192
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193
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194 static int
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195 find_device_id(const char *devname, int iscapture, AudioDeviceID * id)
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196 {
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197 int i = ((iscapture) ? inputDeviceCount : outputDeviceCount);
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198 COREAUDIO_DeviceList *devs = ((iscapture) ? inputDevices : outputDevices);
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199 while (i--) {
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200 if (SDL_strcmp(devname, devs->name) == 0) {
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201 *id = devs->id;
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202 return 1;
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203 }
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204 devs++;
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205 }
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206
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207 return 0;
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208 }
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209
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210
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211 static int
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212 COREAUDIO_DetectDevices(int iscapture)
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213 {
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214 if (iscapture) {
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215 build_device_list(1, &inputDevices, &inputDeviceCount);
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216 return inputDeviceCount;
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217 } else {
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218 build_device_list(0, &outputDevices, &outputDeviceCount);
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219 return outputDeviceCount;
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220 }
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221
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222 return 0; /* shouldn't ever hit this. */
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223 }
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224
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225
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226 static const char *
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227 COREAUDIO_GetDeviceName(int index, int iscapture)
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228 {
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229 if ((iscapture) && (index < inputDeviceCount)) {
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230 return inputDevices[index].name;
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231 } else if ((!iscapture) && (index < outputDeviceCount)) {
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232 return outputDevices[index].name;
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233 }
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234
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235 SDL_SetError("No such device");
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236 return NULL;
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237 }
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238
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239
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240 static void
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241 COREAUDIO_Deinitialize(void)
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242 {
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243 free_device_lists();
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244 }
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245
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246
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247 /* The CoreAudio callback */
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248 static OSStatus
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249 outputCallback(void *inRefCon,
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250 AudioUnitRenderActionFlags * ioActionFlags,
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251 const AudioTimeStamp * inTimeStamp,
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252 UInt32 inBusNumber, UInt32 inNumberFrames,
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253 AudioBufferList * ioData)
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254 {
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255 SDL_AudioDevice *this = (SDL_AudioDevice *) inRefCon;
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256 AudioBuffer *abuf;
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257 UInt32 remaining, len;
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258 void *ptr;
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259 UInt32 i;
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260
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261 /* Only do anything if audio is enabled and not paused */
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262 if (!this->enabled || this->paused) {
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263 for (i = 0; i < ioData->mNumberBuffers; i++) {
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264 abuf = &ioData->mBuffers[i];
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265 SDL_memset(abuf->mData, this->spec.silence, abuf->mDataByteSize);
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266 }
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267 return 0;
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268 }
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269
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270 /* No SDL conversion should be needed here, ever, since we accept
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271 any input format in OpenAudio, and leave the conversion to CoreAudio.
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272 */
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273 /*
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274 assert(!this->convert.needed);
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275 assert(this->spec.channels == ioData->mNumberChannels);
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276 */
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277
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278 for (i = 0; i < ioData->mNumberBuffers; i++) {
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279 abuf = &ioData->mBuffers[i];
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280 remaining = abuf->mDataByteSize;
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281 ptr = abuf->mData;
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282 while (remaining > 0) {
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283 if (this->hidden->bufferOffset >= this->hidden->bufferSize) {
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284 /* Generate the data */
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285 SDL_memset(this->hidden->buffer, this->spec.silence,
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286 this->hidden->bufferSize);
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287 SDL_mutexP(this->mixer_lock);
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288 (*this->spec.callback)(this->spec.userdata,
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289 this->hidden->buffer, this->hidden->bufferSize);
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290 SDL_mutexV(this->mixer_lock);
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291 this->hidden->bufferOffset = 0;
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292 }
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293
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294 len = this->hidden->bufferSize - this->hidden->bufferOffset;
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295 if (len > remaining)
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296 len = remaining;
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297 SDL_memcpy(ptr, (char *)this->hidden->buffer +
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298 this->hidden->bufferOffset, len);
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299 ptr = (char *)ptr + len;
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300 remaining -= len;
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301 this->hidden->bufferOffset += len;
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302 }
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303 }
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304
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305 return 0;
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306 }
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307
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308 static OSStatus
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309 inputCallback(void *inRefCon,
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310 AudioUnitRenderActionFlags * ioActionFlags,
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311 const AudioTimeStamp * inTimeStamp,
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312 UInt32 inBusNumber, UInt32 inNumberFrames,
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313 AudioBufferList * ioData)
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314 {
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315 //err = AudioUnitRender(afr->fAudioUnit, ioActionFlags, inTimeStamp, inBusNumber, inNumberFrames, afr->fAudioBuffer);
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316 // !!! FIXME: write me!
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317 return noErr;
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318 }
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319
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320
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321 static void
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322 COREAUDIO_CloseDevice(_THIS)
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323 {
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324 if (this->hidden != NULL) {
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325 if (this->hidden->audioUnitOpened) {
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326 OSStatus result = noErr;
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327 AURenderCallbackStruct callback;
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328 const AudioUnitElement output_bus = 0;
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329 const AudioUnitElement input_bus = 1;
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330 const int iscapture = this->iscapture;
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331 const AudioUnitElement bus =
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332 ((iscapture) ? input_bus : output_bus);
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333 const AudioUnitScope scope =
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334 ((iscapture) ? kAudioUnitScope_Output :
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335 kAudioUnitScope_Input);
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336
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337 /* stop processing the audio unit */
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338 result = AudioOutputUnitStop(this->hidden->audioUnit);
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339
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340 /* Remove the input callback */
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341 SDL_memset(&callback, '\0', sizeof(AURenderCallbackStruct));
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342 result = AudioUnitSetProperty(this->hidden->audioUnit,
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343 kAudioUnitProperty_SetRenderCallback,
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344 scope, bus, &callback,
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345 sizeof(callback));
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346
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347 CloseComponent(this->hidden->audioUnit);
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348 this->hidden->audioUnitOpened = 0;
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349 }
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350 SDL_free(this->hidden->buffer);
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351 SDL_free(this->hidden);
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352 this->hidden = NULL;
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353 }
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354 }
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355
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356
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357 #define CHECK_RESULT(msg) \
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358 if (result != noErr) { \
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359 COREAUDIO_CloseDevice(this); \
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360 SDL_SetError("CoreAudio error (%s): %d", msg, (int) result); \
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361 return 0; \
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362 }
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363
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364 static int
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365 find_device_by_name(_THIS, const char *devname, int iscapture)
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366 {
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367 AudioDeviceID devid = 0;
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368 OSStatus result = noErr;
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369 UInt32 size = 0;
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370 UInt32 alive = 0;
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371 pid_t pid = 0;
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372
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373 if (devname == NULL) {
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374 size = sizeof(AudioDeviceID);
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375 const AudioHardwarePropertyID propid =
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376 ((iscapture) ? kAudioHardwarePropertyDefaultInputDevice :
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377 kAudioHardwarePropertyDefaultOutputDevice);
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378
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379 result = AudioHardwareGetProperty(propid, &size, &devid);
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380 CHECK_RESULT("AudioHardwareGetProperty (default device)");
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381 } else {
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382 if (!find_device_id(devname, iscapture, &devid)) {
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383 SDL_SetError("CoreAudio: No such audio device.");
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384 return 0;
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385 }
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386 }
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387
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388 size = sizeof(alive);
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389 result = AudioDeviceGetProperty(devid, 0, iscapture,
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390 kAudioDevicePropertyDeviceIsAlive,
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391 &size, &alive);
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392 CHECK_RESULT
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393 ("AudioDeviceGetProperty (kAudioDevicePropertyDeviceIsAlive)");
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394
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395 if (!alive) {
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396 SDL_SetError("CoreAudio: requested device exists, but isn't alive.");
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397 return 0;
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398 }
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399
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400 size = sizeof(pid);
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401 result = AudioDeviceGetProperty(devid, 0, iscapture,
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402 kAudioDevicePropertyHogMode, &size, &pid);
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403
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404 /* some devices don't support this property, so errors are fine here. */
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405 if ((result == noErr) && (pid != -1)) {
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406 SDL_SetError("CoreAudio: requested device is being hogged.");
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407 return 0;
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408 }
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409
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diff changeset
410 this->hidden->deviceID = devid;
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411 return 1;
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412 }
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413
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414
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diff changeset
415 static int
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416 prepare_audiounit(_THIS, const char *devname, int iscapture,
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417 const AudioStreamBasicDescription * strdesc)
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418 {
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419 OSStatus result = noErr;
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420 AURenderCallbackStruct callback;
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421 ComponentDescription desc;
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422 Component comp = NULL;
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423 const AudioUnitElement output_bus = 0;
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424 const AudioUnitElement input_bus = 1;
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425 const AudioUnitElement bus = ((iscapture) ? input_bus : output_bus);
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426 const AudioUnitScope scope = ((iscapture) ? kAudioUnitScope_Output :
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427 kAudioUnitScope_Input);
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428
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429 if (!find_device_by_name(this, devname, iscapture)) {
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430 SDL_SetError("Couldn't find requested CoreAudio device");
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431 return 0;
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432 }
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433
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434 SDL_memset(&desc, '\0', sizeof(ComponentDescription));
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435 desc.componentType = kAudioUnitType_Output;
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436 desc.componentSubType = kAudioUnitSubType_DefaultOutput;
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437 desc.componentManufacturer = kAudioUnitManufacturer_Apple;
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438
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439 comp = FindNextComponent(NULL, &desc);
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440 if (comp == NULL) {
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441 SDL_SetError("Couldn't find requested CoreAudio component");
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442 return 0;
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443 }
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diff changeset
444
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diff changeset
445 /* Open & initialize the audio unit */
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446 result = OpenAComponent(comp, &this->hidden->audioUnit);
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diff changeset
447 CHECK_RESULT("OpenAComponent");
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448
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449 this->hidden->audioUnitOpened = 1;
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450
2049
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451 result = AudioUnitSetProperty(this->hidden->audioUnit,
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452 kAudioOutputUnitProperty_CurrentDevice,
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453 kAudioUnitScope_Global, 0,
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454 &this->hidden->deviceID,
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455 sizeof(AudioDeviceID));
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456 CHECK_RESULT
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diff changeset
457 ("AudioUnitSetProperty (kAudioOutputUnitProperty_CurrentDevice)");
2049
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458
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diff changeset
459 /* Set the data format of the audio unit. */
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460 result = AudioUnitSetProperty(this->hidden->audioUnit,
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461 kAudioUnitProperty_StreamFormat,
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462 scope, bus, strdesc, sizeof(*strdesc));
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463 CHECK_RESULT("AudioUnitSetProperty (kAudioUnitProperty_StreamFormat)");
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diff changeset
464
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465 /* Set the audio callback */
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466 SDL_memset(&callback, '\0', sizeof(AURenderCallbackStruct));
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diff changeset
467 callback.inputProc = ((iscapture) ? inputCallback : outputCallback);
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diff changeset
468 callback.inputProcRefCon = this;
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diff changeset
469 result = AudioUnitSetProperty(this->hidden->audioUnit,
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diff changeset
470 kAudioUnitProperty_SetRenderCallback,
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diff changeset
471 scope, bus, &callback, sizeof(callback));
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472 CHECK_RESULT
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diff changeset
473 ("AudioUnitSetProperty (kAudioUnitProperty_SetRenderCallback)");
2049
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474
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diff changeset
475 /* Calculate the final parameters for this audio specification */
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diff changeset
476 SDL_CalculateAudioSpec(&this->spec);
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diff changeset
477
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diff changeset
478 /* Allocate a sample buffer */
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diff changeset
479 this->hidden->bufferOffset = this->hidden->bufferSize = this->spec.size;
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diff changeset
480 this->hidden->buffer = SDL_malloc(this->hidden->bufferSize);
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diff changeset
481
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diff changeset
482 result = AudioUnitInitialize(this->hidden->audioUnit);
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diff changeset
483 CHECK_RESULT("AudioUnitInitialize");
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diff changeset
484
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diff changeset
485 /* Finally, start processing of the audio unit */
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diff changeset
486 result = AudioOutputUnitStart(this->hidden->audioUnit);
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diff changeset
487 CHECK_RESULT("AudioOutputUnitStart");
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diff changeset
488
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
489 /* We're running! */
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diff changeset
490 return 1;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
491 }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
492
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
493
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
494 static int
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
495 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>
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diff changeset
496 {
2016
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
497 AudioStreamBasicDescription strdesc;
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents: 2043
diff changeset
498 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
499 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
500
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
501 /* 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>
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diff changeset
502 this->hidden = (struct SDL_PrivateAudioData *)
2060
866052b01ee5 indent is evil
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diff changeset
503 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>
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diff changeset
504 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
505 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
506 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
507 }
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 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
509
935
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
510 /* 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
511 SDL_memset(&strdesc, '\0', sizeof(AudioStreamBasicDescription));
2016
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
512 strdesc.mFormatID = kAudioFormatLinearPCM;
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
513 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
514 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
515 strdesc.mSampleRate = this->spec.freq;
2016
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
516 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
517
2003
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
518 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
519 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
520 /* 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
521 switch (test_format) {
2043
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
522 case AUDIO_U8:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
523 case AUDIO_S8:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
524 case AUDIO_U16LSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
525 case AUDIO_S16LSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
526 case AUDIO_U16MSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
527 case AUDIO_S16MSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
528 case AUDIO_S32LSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
529 case AUDIO_S32MSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
530 case AUDIO_F32LSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
531 case AUDIO_F32MSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
532 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
533 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
534 if (SDL_AUDIO_ISBIGENDIAN(this->spec.format))
2043
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
535 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
536
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
537 if (SDL_AUDIO_ISFLOAT(this->spec.format))
2043
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
538 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
539 else if (SDL_AUDIO_ISSIGNED(this->spec.format))
2043
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
540 strdesc.mFormatFlags |= kLinearPCMFormatFlagIsSignedInteger;
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
541 break;
2003
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
542 }
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
543 }
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
544
2043
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
545 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
546 COREAUDIO_CloseDevice(this);
2003
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
547 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
548 return 0;
2003
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
549 }
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
550
2016
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
551 strdesc.mBytesPerFrame =
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
552 strdesc.mBitsPerChannel * strdesc.mChannelsPerFrame / 8;
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
553 strdesc.mBytesPerPacket =
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
554 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
555
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
556 if (!prepare_audiounit(this, devname, iscapture, &strdesc)) {
2057
c2fed8bb6700 Oh for crying out loud...
Ryan C. Gordon <icculus@icculus.org>
parents: 2055
diff changeset
557 COREAUDIO_CloseDevice(this);
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2057
diff changeset
558 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
559 }
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1487
diff changeset
560
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2057
diff changeset
561 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
562 }
935
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
563
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
564 static int
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2057
diff changeset
565 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
566 {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
567 /* 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
568 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
569 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
570 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
571 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
572 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
573 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
574
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2057
diff changeset
575 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
576
3699
4160ba33b597 Removed test for "driver is valid, but doesn't see any audio devices."
Ryan C. Gordon <icculus@icculus.org>
parents: 3697
diff changeset
577 return 1; /* this audio target is available. */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
578 }
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 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
581 "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
582 };
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
583
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
584 /* vi: set ts=4 sw=4 expandtab: */