Mercurial > sdl-ios-xcode

annotate src/audio/macosx/SDL_coreaudio.c @ 2247:93994f65c74c

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Removed hermes since it's LGPL and not compatible with a commercial license. Prepping for using MMX and SSE intrinsics instead of inline assembly. .. except for memcpy equivalents which only get faster if they can exploit the parallelism of loading into multiple SIMD registers. :)
author Sam Lantinga <slouken@libsdl.org>
date Wed, 15 Aug 2007 08:21:10 +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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diff changeset
447
2049
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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)");
2049
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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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diff changeset
475 scope, bus, strdesc, sizeof(*strdesc));
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diff changeset
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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diff changeset
487
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diff changeset
488 /* Calculate the final parameters for this audio specification */
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Ryan C. Gordon <icculus@icculus.org>
parents: 2043
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.
Ryan C. Gordon <icculus@icculus.org>
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.
Ryan C. Gordon <icculus@icculus.org>
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>
parents: 2043
diff changeset
498 /* Finally, start processing of the audio unit */
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
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>
parents: 2043
diff changeset
501
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
502 /* We're running! */
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
503 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
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>
parents: 2043
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>
parents: 2057
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: */